Models 44

Grok 4.7

by SpaceXAIreasoning defaultClean
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Running live in a sandboxed frame. Click inside it before using the keyboard.

How it went

Total time
12 min 36 s
Cost
$0.354
Output tokens
58,650
Spent thinking
48,714 tokens
Speed
77.7 tok/s
Console errors
0
First token after
1.2 s
First visible text after
11 min 31 s
Prompt tokens
1,739
Code size
27.1 KB
Finish reason
stop
Served by
xAI
Model id
x-ai/grok-4.7
Reasoning sent
model default
Max output
450,000 tokens
Generated
Nov 12, 2026

What it was asked

The prompt
Create a set of four animated weather cards (sunny, rainy, snowy, stormy), made with HTML and CSS only. Requirements: - Absolutely no JavaScript: the file must not contain any <script> tag or inline event handler. - No images, no SVG, no icon fonts: every weather icon is built from HTML elements and pseudo-elements styled with CSS. - Each card shows an animated icon (rotating sun rays, falling rain drops, drifting snowflakes, flashing lightning), a city name, a temperature and a short description. - Each card has its own background gradient matching the weather. - The cards are displayed in a responsive grid (4 per row on desktop, stacked on mobile) and lift up on hover. - Smooth infinite animations using @keyframes, and respect prefers-reduced-motion.
System prompt, sent with every prompt
You are generating a self-contained web demo. It will be rendered automatically in a sandboxed iframe and compared side by side with the output of other AI models given the exact same task.

Output rules:
- Reply with exactly ONE fenced code block containing the complete file: ```html (or ```svg when the task asks for an SVG). No text before or after the code block.
- Everything must be inline: CSS in <style>, JavaScript in <script>. No external files, images, fonts or network requests, except the CDN URLs explicitly allowed by the task.
- Do not use localStorage, sessionStorage, cookies, IndexedDB, alert(), confirm(), prompt() or window.open(): they are blocked in the sandbox and will throw.
- The page must look right in a 1280×800 viewport and adapt gracefully down to 375px wide. No horizontal scrollbar.
- Something meaningful must be visible on first paint: a screenshot is taken automatically about 3 seconds after load, without any interaction.
- Everything that makes the demo interesting must be visible within the first seconds: nothing hidden behind a high score, a later level or a long play session.
- Games must start in a self-playing demo mode (a simple AI plays) behind a "Click or press a key to start" message, so the game can be judged in action without playing.
- The iframe only receives keyboard events after the user clicks it: if the demo uses the keyboard, display a clear "Click or press a key to start" message.
- The code must run with zero errors in the console of the latest Chrome.

Code run-1.html · 966 lines

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Four Skies — Weather Cards</title>
  <style>
    :root {
      --sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
      --serif: Georgia, "Iowan Old Style", "Palatino Linotype", Palatino, "Times New Roman", serif;
      --ink: #f4f0e8;
      --muted: #b7c2d6;
      --page: #0c1220;
    }

    * { box-sizing: border-box; }

    html, body {
      margin: 0;
      background: var(--page);
      overflow-x: hidden;
    }

    body {
      min-height: 100vh;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      gap: 26px;
      padding: 32px 24px 36px;
      color: var(--ink);
      font-family: var(--sans);
      line-height: 1.4;
      -webkit-font-smoothing: antialiased;
      background:
        radial-gradient(880px 480px at 8% -8%, rgba(255, 168, 72, 0.18), transparent 56%),
        radial-gradient(760px 440px at 108% 0%, rgba(126, 164, 255, 0.16), transparent 52%),
        radial-gradient(680px 460px at 78% 118%, rgba(150, 120, 255, 0.13), transparent 50%),
        var(--page);
    }

    h1, h2, p { margin: 0; }

    header {
      width: min(680px, 100%);
      min-width: 0;
      text-align: center;
    }

    .eyebrow {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      margin-bottom: 10px;
      font-size: 0.72rem;
      font-weight: 700;
      letter-spacing: 0.28em;
      text-transform: uppercase;
      color: #f0c27a;
    }

    .live {
      width: 7px;
      height: 7px;
      border-radius: 50%;
      background: #ffb703;
      box-shadow: 0 0 0 0 rgba(255, 183, 3, 0.55);
      animation: ping 2.2s ease-out infinite;
    }

    h1 {
      font-family: var(--serif);
      font-size: clamp(2rem, 4vw, 2.8rem);
      font-weight: 700;
      letter-spacing: -0.03em;
      line-height: 1.05;
      color: #f6f1e7;
    }

    @supports ((-webkit-background-clip: text) or (background-clip: text)) {
      h1 {
        background-image: linear-gradient(105deg, #ffd98a 0%, #fff8ee 46%, #d5e4ff 100%);
        -webkit-background-clip: text;
        background-clip: text;
        color: transparent;
      }
    }

    .lede {
      margin-top: 8px;
      color: var(--muted);
      font-size: 1.02rem;
    }

    .pips {
      display: flex;
      justify-content: center;
      gap: 8px;
      margin-top: 14px;
    }

    .pip {
      width: 8px;
      height: 8px;
      border-radius: 50%;
    }

    .pip.sun { background: #ffb703; box-shadow: 0 0 8px #ffb703; }
    .pip.rain { background: #7eb6e0; }
    .pip.snow { background: #eef5ff; }
    .pip.storm { background: #8d82c9; }

    .grid {
      width: min(1160px, 100%);
      min-width: 0;
      display: grid;
      grid-template-columns: repeat(4, minmax(0, 1fr));
      gap: 18px;
    }

    .card {
      --lift: 0 14px 28px rgba(0, 0, 0, 0.24);
      position: relative;
      overflow: hidden;
      display: flex;
      flex-direction: column;
      align-items: center;
      text-align: center;
      min-width: 0;
      padding: 18px 16px 22px;
      border-radius: 28px;
      border: 1px solid rgba(255, 255, 255, 0.32);
      box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.55), var(--lift);
      transform: translateY(0);
      transition: transform 0.4s cubic-bezier(0.22, 1, 0.36, 1), box-shadow 0.4s ease;
    }

    .card > * {
      position: relative;
      z-index: 1;
    }

    .card::before {
      content: "";
      position: absolute;
      top: 0;
      left: 14%;
      right: 14%;
      height: 1px;
      z-index: 4;
      background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.9), transparent);
    }

    .card:hover {
      transform: translateY(-12px);
    }

    .card-sun {
      background: linear-gradient(180deg, #ffb03a 0%, #ffd36a 42%, #fff1cc 100%);
      color: #5c2e0c;
      --lift: 0 16px 32px rgba(255, 130, 40, 0.24);
    }

    .card-sun:hover { --lift: 0 28px 46px rgba(255, 110, 30, 0.36); }

    .card-rain {
      background: linear-gradient(180deg, #8ebcde 0%, #c5e2f4 40%, #eef6fc 100%);
      color: #123048;
      --lift: 0 16px 32px rgba(40, 90, 140, 0.22);
    }

    .card-rain:hover { --lift: 0 28px 46px rgba(30, 80, 130, 0.32); }

    .card-snow {
      background: linear-gradient(180deg, #b9d4ee 0%, #e7f1fa 44%, #f8fbfe 100%);
      color: #163552;
      --lift: 0 16px 32px rgba(50, 90, 130, 0.18);
    }

    .card-snow:hover { --lift: 0 28px 46px rgba(40, 80, 120, 0.28); }

    .card-storm {
      background: linear-gradient(180deg, #343b66 0%, #1e243f 52%, #14182b 100%);
      color: #f4f6ff;
      border-color: rgba(186, 178, 230, 0.28);
      --lift: 0 16px 34px rgba(0, 0, 0, 0.4);
    }

    .card-storm:hover { --lift: 0 28px 48px rgba(20, 16, 48, 0.55); }

    .card-sun::after {
      content: "";
      position: absolute;
      top: -10%;
      left: 0;
      width: 28%;
      height: 120%;
      z-index: 0;
      pointer-events: none;
      opacity: 0;
      background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.42), transparent);
      transform: translateX(-120%) skewX(-16deg);
      animation: sheen 6.2s ease-in-out infinite;
    }

    .card-storm::after {
      content: "";
      position: absolute;
      inset: 0;
      z-index: 3;
      pointer-events: none;
      opacity: 0;
      background: radial-gradient(circle at 50% 30%, rgba(255, 244, 200, 0.55), rgba(255, 255, 255, 0.04) 40%, transparent 62%);
      animation: skyflash 2.6s ease-in-out infinite;
    }

    .stage {
      position: relative;
      width: 100%;
      height: 156px;
      margin-bottom: 4px;
      overflow: hidden;
    }

    .card-sun .stage {
      background: radial-gradient(circle at 50% 46%, rgba(255, 255, 255, 0.34), transparent 58%);
    }

    .card-rain .stage {
      background: radial-gradient(circle at 50% 40%, rgba(255, 255, 255, 0.2), transparent 60%);
    }

    .card-snow .stage {
      background: radial-gradient(circle at 50% 46%, rgba(255, 255, 255, 0.4), transparent 62%);
    }

    .card-storm .stage {
      background: radial-gradient(circle at 50% 34%, rgba(255, 214, 100, 0.14), transparent 56%);
    }

    .shade {
      position: absolute;
      z-index: 0;
      left: 50%;
      bottom: 6px;
      width: 86px;
      height: 12px;
      margin-left: -43px;
      border-radius: 50%;
      background: radial-gradient(ellipse, rgba(20, 40, 70, 0.2), transparent 70%);
    }

    .card-sun .shade {
      background: radial-gradient(ellipse, rgba(150, 60, 0, 0.22), transparent 70%);
    }

    .card-storm .shade {
      background: radial-gradient(ellipse, rgba(0, 0, 0, 0.35), transparent 70%);
    }

    .tag {
      font-size: 0.68rem;
      font-weight: 700;
      letter-spacing: 0.22em;
      text-transform: uppercase;
    }

    .tag::before {
      content: "";
      display: inline-block;
      width: 7px;
      height: 7px;
      margin-right: 8px;
      border-radius: 50%;
      background: currentColor;
      box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.22);
      vertical-align: 1px;
    }

    .city {
      margin-top: 4px;
      font-family: var(--serif);
      font-size: 1.65rem;
      font-weight: 700;
      letter-spacing: -0.03em;
      line-height: 1.1;
    }

    .region {
      margin-top: 3px;
      font-size: 0.66rem;
      font-weight: 700;
      letter-spacing: 0.16em;
      text-transform: uppercase;
      opacity: 0.72;
    }

    .temp {
      margin-top: 8px;
      font-size: clamp(2.5rem, 3.4vw, 3.25rem);
      font-weight: 650;
      font-weight: 600;
      letter-spacing: -0.045em;
      line-height: 0.95;
      font-variant-numeric: tabular-nums;
    }

    .unit {
      position: relative;
      top: -0.72em;
      margin-left: 1px;
      font-size: 0.4em;
      font-weight: 700;
      letter-spacing: 0;
    }

    .range {
      margin-top: 8px;
      font-size: 0.75rem;
      font-weight: 650;
      font-weight: 600;
      letter-spacing: 0.04em;
      opacity: 0.78;
    }

    .range span { margin: 0 5px; opacity: 0.55; }

    .desc {
      margin-top: 10px;
      max-width: 24ch;
      font-family: var(--serif);
      font-style: italic;
      font-size: 0.96rem;
      line-height: 1.4;
    }

    .card-sun .desc { color: #6d3a12; }
    .card-rain .desc { color: #245074; }
    .card-snow .desc { color: #2d5274; }
    .card-storm .desc { color: #cdd5ee; }
    .card-storm .region,
    .card-storm .range { opacity: 0.78; }

    /* Sun */
    .sun {
      position: absolute;
      z-index: 1;
      left: 50%;
      top: 50%;
      width: 120px;
      height: 120px;
      margin: -60px 0 0 -60px;
      animation: bob 6s ease-in-out infinite;
    }

    .glow {
      position: absolute;
      inset: 8px;
      z-index: 0;
      border-radius: 50%;
      background: radial-gradient(circle, rgba(255, 236, 170, 0.75), rgba(255, 170, 40, 0.08) 62%, transparent 70%);
      animation: pulse 3.2s ease-in-out infinite;
    }

    .rays {
      position: absolute;
      inset: 0;
      z-index: 1;
      animation: spin 11s linear infinite;
    }

    .rays span {
      position: absolute;
      left: 50%;
      border-radius: 4px;
      background: linear-gradient(#ffffff, #ffe08a);
      box-shadow: 0 0 6px #fff, 0 0 10px rgba(255, 186, 48, 0.9);
    }

    .rays-outer span:nth-child(odd) {
      top: 1px;
      width: 4px;
      height: 18px;
      margin-left: -2px;
      transform-origin: 2px 59px;
    }

    .rays-outer span:nth-child(even) {
      top: 8px;
      width: 3px;
      height: 12px;
      margin-left: -1.5px;
      transform-origin: 1.5px 52px;
      opacity: 0.9;
    }

    .rays-outer span:nth-child(1) { transform: rotate(0deg); }
    .rays-outer span:nth-child(2) { transform: rotate(30deg); }
    .rays-outer span:nth-child(3) { transform: rotate(60deg); }
    .rays-outer span:nth-child(4) { transform: rotate(90deg); }
    .rays-outer span:nth-child(5) { transform: rotate(120deg); }
    .rays-outer span:nth-child(6) { transform: rotate(150deg); }
    .rays-outer span:nth-child(7) { transform: rotate(180deg); }
    .rays-outer span:nth-child(8) { transform: rotate(210deg); }
    .rays-outer span:nth-child(9) { transform: rotate(240deg); }
    .rays-outer span:nth-child(10) { transform: rotate(270deg); }
    .rays-outer span:nth-child(11) { transform: rotate(300deg); }
    .rays-outer span:nth-child(12) { transform: rotate(330deg); }

    .rays-inner {
      animation-duration: 7s;
      animation-direction: reverse;
    }

    .rays-inner span {
      top: 20px;
      width: 3px;
      height: 9px;
      margin-left: -1.5px;
      transform-origin: 1.5px 40px;
      background: #fff8df;
      opacity: 0.95;
    }

    .rays-inner span:nth-child(1) { transform: rotate(0deg); }
    .rays-inner span:nth-child(2) { transform: rotate(45deg); }
    .rays-inner span:nth-child(3) { transform: rotate(90deg); }
    .rays-inner span:nth-child(4) { transform: rotate(135deg); }
    .rays-inner span:nth-child(5) { transform: rotate(180deg); }
    .rays-inner span:nth-child(6) { transform: rotate(225deg); }
    .rays-inner span:nth-child(7) { transform: rotate(270deg); }
    .rays-inner span:nth-child(8) { transform: rotate(315deg); }

    .core {
      position: absolute;
      z-index: 2;
      left: 32px;
      top: 32px;
      width: 56px;
      height: 56px;
      border-radius: 50%;
      background: radial-gradient(circle at 34% 32%, #fffef8 0%, #ffe98a 30%, #ffb703 64%, #ff8a00 100%);
      box-shadow:
        0 0 0 6px rgba(255, 220, 110, 0.32),
        0 0 26px 8px rgba(255, 160, 40, 0.5);
      animation: pulse 3.2s ease-in-out infinite;
    }

    .core::before {
      content: "";
      position: absolute;
      inset: 0;
      border-radius: 50%;
      background: radial-gradient(circle at 50% 118%, rgba(170, 70, 0, 0.32), transparent 48%);
    }

    .core::after {
      content: "";
      position: absolute;
      left: 11px;
      top: 10px;
      width: 18px;
      height: 11px;
      border-radius: 50%;
      background: rgba(255, 255, 255, 0.88);
      transform: rotate(-28deg);
    }

    /* Clouds */
    .cloud {
      position: absolute;
      z-index: 2;
      left: 50%;
      top: 12px;
      width: 116px;
      height: 68px;
      margin-left: -58px;
      animation: bob 4.4s ease-in-out infinite;
    }

    .cloud .base,
    .cloud .puff {
      position: absolute;
      background: #fff;
    }

    .cloud .base {
      left: 8px;
      right: 8px;
      bottom: 4px;
      height: 30px;
      border-radius: 16px;
    }

    .cloud .puff { border-radius: 50%; }
    .cloud .puff.a { width: 40px; height: 40px; left: 8px; bottom: 16px; }
    .cloud .puff.b { width: 54px; height: 54px; left: 30px; bottom: 20px; }
    .cloud .puff.c { width: 34px; height: 34px; right: 8px; bottom: 16px; }

    .cloud .puff.b::after {
      content: "";
      position: absolute;
      left: 18%;
      top: 16%;
      width: 42%;
      height: 28%;
      border-radius: 50%;
      background: rgba(255, 255, 255, 0.72);
    }

    .rain-cloud { animation-duration: 4.2s; filter: drop-shadow(0 8px 5px rgba(24, 60, 100, 0.18)); }
    .snow-cloud { animation-duration: 5.1s; filter: drop-shadow(0 8px 5px rgba(30, 60, 100, 0.16)); }

    .storm-cloud {
      animation-duration: 3.5s;
      filter: drop-shadow(0 10px 8px rgba(0, 0, 0, 0.38));
    }

    .storm-cloud .base,
    .storm-cloud .puff.a,
    .storm-cloud .puff.c { background: #5d6688; }

    .storm-cloud .puff.b {
      background: linear-gradient(180deg, #aeb6d0, #667090 58%);
    }

    .storm-cloud .puff.b::after { background: rgba(255, 255, 255, 0.2); }

    /* Precipitation */
    .drops {
      position: absolute;
      z-index: 1;
      left: 50%;
      top: 70px;
      width: 100px;
      height: 72px;
      margin-left: -50px;
    }

    .drop {
      position: absolute;
      top: 0;
      width: 4px;
      height: 12px;
      border-radius: 4px;
      opacity: 0;
      animation: fall 1.15s linear infinite;
    }

    .rain-drops .drop {
      background: linear-gradient(180deg, rgba(255, 255, 255, 0.35), #ffffff);
      box-shadow: 0 2px 3px rgba(16, 48, 80, 0.18);
    }

    .storm-drops .drop {
      width: 3px;
      background: linear-gradient(180deg, rgba(255, 255, 255, 0.15), #d5e2ff);
      box-shadow: 0 0 6px rgba(200, 220, 255, 0.45);
      animation-duration: 0.7s;
    }

    .rain-drops .drop:nth-child(1) { left: 6px; height: 10px; animation-delay: -0.15s; animation-duration: 1.05s; }
    .rain-drops .drop:nth-child(2) { left: 22px; height: 14px; animation-delay: -0.55s; animation-duration: 1.25s; }
    .rain-drops .drop:nth-child(3) { left: 38px; height: 11px; animation-delay: -0.9s; animation-duration: 0.95s; }
    .rain-drops .drop:nth-child(4) { left: 54px; height: 13px; animation-delay: -0.3s; animation-duration: 1.15s; }
    .rain-drops .drop:nth-child(5) { left: 70px; height: 9px; animation-delay: -1.1s; animation-duration: 1.35s; }
    .rain-drops .drop:nth-child(6) { left: 84px; height: 12px; animation-delay: -0.7s; animation-duration: 1.05s; }

    .storm-drops .drop:nth-child(1) { left: 4px; animation-delay: -0.2s; animation-duration: 0.72s; }
    .storm-drops .drop:nth-child(2) { left: 28px; height: 14px; animation-delay: -0.5s; animation-duration: 0.64s; }
    .storm-drops .drop:nth-child(3) { left: 62px; animation-delay: -0.35s; animation-duration: 0.8s; }
    .storm-drops .drop:nth-child(4) { left: 84px; height: 10px; animation-delay: -0.6s; animation-duration: 0.7s; }

    .flakes {
      position: absolute;
      z-index: 1;
      left: 50%;
      top: 66px;
      width: 124px;
      height: 80px;
      margin-left: -62px;
    }

    .flake {
      position: absolute;
      top: 0;
      opacity: 0;
      background: #fff;
    }

    .flake.dot {
      width: 5px;
      height: 5px;
      border-radius: 50%;
      box-shadow: 0 0 0 1px rgba(50, 90, 130, 0.18), 0 0 8px rgba(255, 255, 255, 0.95);
      animation: drift 3.2s linear infinite;
    }

    .flake.star {
      width: 3px;
      height: 16px;
      border-radius: 2px;
      filter: drop-shadow(0 0 1px rgba(40, 80, 120, 0.45)) drop-shadow(0 0 4px rgba(255, 255, 255, 0.9));
      animation: drift 3.8s linear infinite;
    }

    .flake.star::before,
    .flake.star::after {
      content: "";
      position: absolute;
      left: 0;
      top: 0;
      width: 3px;
      height: 16px;
      border-radius: 2px;
      background: #fff;
    }

    .flake.star::before { transform: rotate(60deg); }
    .flake.star::after { transform: rotate(-60deg); }

    .flake.alt { animation-name: drift-alt; }

    .flake:nth-child(1) { left: 6px; animation-delay: -0.4s; animation-duration: 3.6s; }
    .flake:nth-child(2) { left: 26px; animation-delay: -1.6s; animation-duration: 3s; }
    .flake:nth-child(3) { left: 42px; animation-delay: -2.4s; animation-duration: 4.1s; }
    .flake:nth-child(4) { left: 60px; width: 8px; height: 8px; animation-delay: -0.8s; animation-duration: 3.4s; }
    .flake:nth-child(5) { left: 78px; animation-delay: -3.2s; animation-duration: 3.8s; }
    .flake:nth-child(6) { left: 96px; width: 4px; height: 4px; animation-delay: -1.2s; animation-duration: 2.9s; }
    .flake:nth-child(7) { left: 112px; animation-delay: -2s; animation-duration: 4.4s; }

    .spark {
      position: absolute;
      z-index: 1;
      width: 4px;
      height: 4px;
      border-radius: 50%;
      background: #fff;
      box-shadow: 0 0 6px #fff, 0 0 1px rgba(40, 80, 120, 0.35);
      animation: twinkle 2.4s ease-in-out infinite;
    }

    .s1 { left: 12%; top: 18%; }
    .s2 { right: 12%; top: 24%; animation-delay: -0.8s; }
    .s3 { left: 20%; top: 50%; width: 3px; height: 3px; animation-delay: -1.5s; }
    .s4 { right: 18%; top: 54%; width: 3px; height: 3px; animation-delay: -2s; }

    /* Lightning */
    .bolt {
      position: absolute;
      z-index: 1;
      left: 50%;
      top: 54px;
      width: 28px;
      height: 52px;
      margin-left: -8px;
      background: linear-gradient(#fffef2, #ffe56a 42%, #ffc107);
      clip-path: polygon(38% 0, 74% 0, 50% 36%, 82% 36%, 18% 100%, 44% 52%, 10% 52%);
      filter: drop-shadow(0 0 6px rgba(255, 226, 80, 0.95));
      transform: rotate(8deg);
      opacity: 0.7;
      animation: flash 2.6s ease-in-out infinite;
    }

    .bolt.small {
      top: 66px;
      width: 16px;
      height: 30px;
      margin-left: 22px;
      transform: rotate(-16deg);
      animation-delay: -1.35s;
      animation-duration: 3.1s;
    }

    .strike-glow {
      position: absolute;
      z-index: 1;
      left: 50%;
      top: 104px;
      width: 40px;
      height: 10px;
      margin-left: -12px;
      border-radius: 50%;
      background: rgba(255, 220, 100, 0.9);
      filter: blur(3px);
      opacity: 0.25;
      animation: skyflash 2.6s ease-in-out infinite;
    }

    @keyframes spin {
      from { transform: rotate(0deg); }
      to { transform: rotate(360deg); }
    }

    @keyframes pulse {
      0%, 100% { transform: scale(1); }
      50% { transform: scale(1.07); }
    }

    @keyframes bob {
      0%, 100% { transform: translateY(0); }
      50% { transform: translateY(-6px); }
    }

    @keyframes fall {
      0% { transform: translateY(-6px); opacity: 0; }
      14% { opacity: 1; }
      78% { opacity: 0.9; }
      100% { transform: translateY(54px); opacity: 0; }
    }

    @keyframes drift {
      0% { transform: translate3d(0, -4px, 0) rotate(0deg); opacity: 0; }
      12% { opacity: 1; }
      50% { transform: translate3d(8px, 32px, 0) rotate(70deg); opacity: 1; }
      100% { transform: translate3d(-4px, 66px, 0) rotate(150deg); opacity: 0; }
    }

    @keyframes drift-alt {
      0% { transform: translate3d(0, -4px, 0) rotate(0deg); opacity: 0; }
      12% { opacity: 1; }
      50% { transform: translate3d(-10px, 34px, 0) rotate(-60deg); opacity: 1; }
      100% { transform: translate3d(6px, 66px, 0) rotate(-140deg); opacity: 0; }
    }

    @keyframes flash {
      0%, 40%, 100% { opacity: 0.5; }
      6% { opacity: 1; }
      9% { opacity: 0.2; }
      13% { opacity: 1; }
      19% { opacity: 0.45; }
      58% { opacity: 0.35; }
      63% { opacity: 1; }
      70% { opacity: 0.45; }
    }

    @keyframes skyflash {
      0%, 40%, 100% { opacity: 0; }
      6% { opacity: 0.8; }
      9% { opacity: 0.08; }
      13% { opacity: 1; }
      19% { opacity: 0; }
      58% { opacity: 0; }
      63% { opacity: 0.7; }
      70% { opacity: 0; }
    }

    @keyframes sheen {
      0%, 62% { transform: translateX(-120%) skewX(-16deg); opacity: 0; }
      74% { opacity: 1; }
      100% { transform: translateX(480%) skewX(-16deg); opacity: 0; }
    }

    @keyframes twinkle {
      0%, 100% { opacity: 0.3; transform: scale(0.75); }
      50% { opacity: 1; transform: scale(1.25); }
    }

    @keyframes ping {
      0% { box-shadow: 0 0 0 0 rgba(255, 183, 3, 0.55); }
      70% { box-shadow: 0 0 0 8px rgba(255, 183, 3, 0); }
      100% { box-shadow: 0 0 0 0 rgba(255, 183, 3, 0); }
    }

    @media (max-width: 980px) {
      body { justify-content: flex-start; }
      .grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    }

    @media (max-width: 560px) {
      body {
        gap: 16px;
        padding: 18px 14px 28px;
      }

      .lede { font-size: 0.95rem; }
      .grid { grid-template-columns: 1fr; gap: 14px; }
      .city { font-size: 1.5rem; }
      .desc { font-size: 0.95rem; }
    }

    @media (prefers-reduced-motion: reduce) {
      .live,
      .sun,
      .rays,
      .core,
      .glow,
      .cloud,
      .drop,
      .flake,
      .spark,
      .bolt,
      .strike-glow,
      .card-sun::after,
      .card-storm::after {
        animation: none !important;
      }

      .card,
      .card::before {
        transition: none !important;
      }

      .card:hover { transform: none; }

      .bolt { opacity: 1 !important; }
      .strike-glow { opacity: 0.7 !important; }
      .card-storm::after,
      .card-sun::after { opacity: 0 !important; }
      .spark { opacity: 0.9 !important; transform: none !important; }

      .drop,
      .flake {
        opacity: 1 !important;
        transform: none !important;
      }

      .rain-drops .drop:nth-child(1) { top: 2px; }
      .rain-drops .drop:nth-child(2) { top: 18px; }
      .rain-drops .drop:nth-child(3) { top: 8px; }
      .rain-drops .drop:nth-child(4) { top: 28px; }
      .rain-drops .drop:nth-child(5) { top: 12px; }
      .rain-drops .drop:nth-child(6) { top: 34px; }

      .storm-drops .drop:nth-child(1) { top: 4px; }
      .storm-drops .drop:nth-child(2) { top: 20px; }
      .storm-drops .drop:nth-child(3) { top: 10px; }
      .storm-drops .drop:nth-child(4) { top: 28px; }

      .flake:nth-child(1) { top: 2px; }
      .flake:nth-child(2) { top: 16px; }
      .flake:nth-child(3) { top: 8px; }
      .flake:nth-child(4) { top: 30px; }
      .flake:nth-child(5) { top: 14px; }
      .flake:nth-child(6) { top: 36px; }
      .flake:nth-child(7) { top: 22px; }
    }
  </style>
</head>
<body>
  <header>
    <p class="eyebrow"><span class="live" aria-hidden="true"></span>This afternoon</p>
    <h1>Four skies</h1>
    <p class="lede">Sun, rain, snow, and a gathering storm.</p>
    <div class="pips" aria-hidden="true">
      <span class="pip sun"></span>
      <span class="pip rain"></span>
      <span class="pip snow"></span>
      <span class="pip storm"></span>
    </div>
  </header>

  <main class="grid">
    <article class="card card-sun">
      <div class="stage" aria-hidden="true">
        <span class="shade"></span>
        <div class="sun">
          <div class="glow"></div>
          <div class="rays rays-outer">
            <span></span><span></span><span></span><span></span>
            <span></span><span></span><span></span><span></span>
            <span></span><span></span><span></span><span></span>
          </div>
          <div class="rays rays-inner">
            <span></span><span></span><span></span><span></span>
            <span></span><span></span><span></span><span></span>
          </div>
          <div class="core"></div>
        </div>
      </div>
      <p class="tag">Sunny</p>
      <h2 class="city">Lisbon</h2>
      <p class="region">Portugal</p>
      <p class="temp">28<span class="unit">&deg;C</span></p>
      <p class="range">High 31&deg; <span>·</span> Low 20&deg;</p>
      <p class="desc">Clear skies and warm sunshine along the river.</p>
    </article>

    <article class="card card-rain">
      <div class="stage" aria-hidden="true">
        <span class="shade"></span>
        <div class="drops rain-drops">
          <span class="drop"></span>
          <span class="drop"></span>
          <span class="drop"></span>
          <span class="drop"></span>
          <span class="drop"></span>
          <span class="drop"></span>
        </div>
        <div class="cloud rain-cloud">
          <span class="puff a"></span>
          <span class="puff b"></span>
          <span class="puff c"></span>
          <span class="base"></span>
        </div>
      </div>
      <p class="tag">Rainy</p>
      <h2 class="city">Seattle</h2>
      <p class="region">Washington</p>
      <p class="temp">11<span class="unit">&deg;C</span></p>
      <p class="range">High 13&deg; <span>·</span> Low 8&deg;</p>
      <p class="desc">Steady rain softens the streets all afternoon.</p>
    </article>

    <article class="card card-snow">
      <div class="stage" aria-hidden="true">
        <span class="shade"></span>
        <span class="spark s1"></span>
        <span class="spark s2"></span>
        <span class="spark s3"></span>
        <span class="spark s4"></span>
        <div class="flakes">
          <span class="flake star"></span>
          <span class="flake dot alt"></span>
          <span class="flake star alt"></span>
          <span class="flake dot alt"></span>
          <span class="flake star"></span>
          <span class="flake dot"></span>
          <span class="flake star alt"></span>
        </div>
        <div class="cloud snow-cloud">
          <span class="puff a"></span>
          <span class="puff b"></span>
          <span class="puff c"></span>
          <span class="base"></span>
        </div>
      </div>
      <p class="tag">Snowy</p>
      <h2 class="city">Helsinki</h2>
      <p class="region">Finland</p>
      <p class="temp">&minus;4<span class="unit">&deg;C</span></p>
      <p class="range">High &minus;1&deg; <span>·</span> Low &minus;8&deg;</p>
      <p class="desc">Quiet snow drifts through the cold, bright air.</p>
    </article>

    <article class="card card-storm">
      <div class="stage" aria-hidden="true">
        <span class="shade"></span>
        <div class="drops storm-drops">
          <span class="drop"></span>
          <span class="drop"></span>
          <span class="drop"></span>
          <span class="drop"></span>
        </div>
        <span class="bolt"></span>
        <span class="bolt small"></span>
        <span class="strike-glow"></span>
        <div class="cloud storm-cloud">
          <span class="puff a"></span>
          <span class="puff b"></span>
          <span class="puff c"></span>
          <span class="base"></span>
        </div>
      </div>
      <p class="tag">Stormy</p>
      <h2 class="city">Miami</h2>
      <p class="region">Florida</p>
      <p class="temp">24<span class="unit">&deg;C</span></p>
      <p class="range">High 28&deg; <span>·</span> Low 23&deg;</p>
      <p class="desc">Thunder rolls as lightning splits the clouds.</p>
    </article>
  </main>
</body>
</html>
Reasoning trace (48,714 tokens)
I'm starting to build four animated weather cards using only HTML and CSS.

I'm planning the layout and animations. Each card will use HTML elements and pseudo-elements for icons. I'll include city names, temperatures, and descriptions. Background gradients will match each weather type. The grid will be responsive with hover lifts. All animations will be smooth and respect prefers-reduced-motion. The entire solution will be a single fenced HTML block.

I've mapped out the four weather scenarios. Sunny will use a warm yellow gradient with rotating sun rays. Rainy will use a blue-gray gradient with falling rain drops. Snowy will use a cool white-blue gradient with drifting snowflakes. Stormy will use a dark purple gradient with flashing lightning. Each card will feature a specific city, temperature, and short description.

I'm refining the card styling. Each card will have rounded corners, padding, and a subtle shadow. On hover, it will lift up eight pixels and gain a stronger shadow. The sun icon will be built from a central circle with rotating rays created through multiple box-shadows or layered divs.

I'm now detailing the icon construction. The sun will use eight thin rectangular rays positioned around a central body element that rotates. Rain drops will be small elongated ovals falling with staggered animation delays. Snowflakes will be small circles or plus-sign shapes created with pseudo-elements.

Snowflakes will drift sideways as they fall. Lightning will be a zigzag bolt made from skewed rectangles that flashes with opacity changes. The page will use a dark slate background with a subtle atmospheric gradient so the vibrant cards stand out. System fonts will be used throughout. I'm now drafting the HTML structure.

The HTML structure is now set. A header introduces the forecast, and four article cards sit in a main grid. Each card places its icon at the top, followed by the city name, a large temperature, and a short description.

I'm finalizing the stormy card's lightning bolt using CSS clip-path polygons and skewed pseudo-elements. This keeps the icon fully HTML and CSS without any SVG or images.

I'm finalizing the exact color values for each card's gradient. Sunny will use warm peach tones. Rainy will use soft blue-gray. Snowy will use cool white-blue. Stormy will use deep purple. I'm also adding a subtle cloud drift animation.

Text colors are being chosen for contrast. Sunny and snowy cards will use dark text. Rainy will use medium text. Stormy will use light text.

The cards will feature a soft inner glow. The icon will sit on a slightly lighter circular backdrop. The temperature will use a large display font. The city name will be uppercase with wide tracking. A thin divider will separate the description.

On hover the card will lift ten pixels. It will scale up slightly. The shadow will strengthen.

The grid will use four columns on desktop. It will stack on mobile. The container will be centered with a max-width of 1200 pixels.

I'm now writing the CSS keyframe animations. The sun rays will rotate continuously over twelve seconds. I'm also starting a glow animation for the sun's core.

I'm now writing the specific CSS keyframe values. The sun core will pulse by scaling up to 1.06 and brightening its glow. Rain drops will fade in, fall seventy pixels, and fade out. Snowflakes will drift sideways while falling. I'm also starting the lightning flash animation.

The lightning flash will pulse in brief bright flashes followed by darkness. A subtle card background pulse was considered but rejected as too distracting. A prefers-reduced-motion media query will disable all animations and transitions. Hover lifts will remain static for accessibility.

I'm ensuring the rain drops, snowflakes, and lightning bolt remain visible by default when animations are disabled. Decorative icons will use aria-hidden for accessibility. The page will feature a sky-themed radial gradient background and a small weather wordmark.

I'm adding subtle glass-like effects behind each card. The sunny card will feature a warm radial glow. The stormy card will use a dark background with an occasional flash overlay. I'm keeping the content minimal to match the requirements. I've started selecting city names and temperatures for each card.

I've finalized the four city cards. Lisbon will show 28°C in the sunny weather. Seattle will show 11°C for the rainy forecast. Helsinki will show −5°C for the snowy weather. Miami will show 24°C for the stormy forecast. Each card will use a short descriptive line for its weather condition.

The sun icon is being refined to a 160-pixel stage. It will use a 120-pixel core with a radial gradient from pale gold to amber to orange. Twelve thin rays will rotate continuously over fourteen seconds. An outer glow circle and an inner highlight will add depth.

The sun icon will use twelve rays spaced thirty degrees apart. Each ray will be a six-pixel wide rectangle positioned at the center with a calculated transform-origin. A second slower ring of shorter rays and a pulsing halo will add extra depth.

A reusable cloud icon is being built from a rounded base and three overlapping white circles. It will sit beneath the rain drops. The cloud will use a soft blue-white tint and a slight shadow.

Rain drops will be five small translucent blue ovals with staggered fall durations. Snowflakes will be mixed sizes with cross shapes made from pseudo-elements. The storm cloud will use a dark purple-blue gradient.

Snowflakes will use pseudo-elements to form star shapes. Staggered animation delays will keep several flakes visible at once. Negative animation-delay values will place them mid-cycle on first paint.

Negative animation delays will place the snowflakes mid-cycle on first paint. The lightning bolt may be invisible at the three-second screenshot mark because its brief flashes occur at the start and end of its cycle.

The lightning bolt will stay dimly visible between flashes so it remains visible on first paint and at the three-second screenshot. The keyframe cycle will use brief bright flashes followed by dimmer periods.

A sky glow pseudo-element will pulse beneath the storm card. The page header will use an elegant title such as "Four Seasons of Weather" or "Live Skies".

A decorative sun or cloud icon in the header was rejected to keep the layout clean. The page background will use a dark slate with two subtle radial gradients and a light gray text color. The card hover lift is now being written.

The hover lift is now defined with a 0.35-second transition and a 12-pixel upward shift. Cards will stack full-width on mobile at 375 pixels with smaller fonts and tight padding. Descriptions will stay short to prevent wrapping. Rain drops and snowflakes will be placed at static heights so they remain visible when motion is reduced.

A subtle rotating sunburst will be added behind the sun icon using a repeating conic gradient. The rainy card gradient is finalized as a soft blue-white to deep blue shade with dark text.

The snowy card gradient is finalized as a soft white-to-blue shade with dark blue text. The stormy card gradient is set to deep purple with light gray text. A subtle lightning glow will pulse behind the storm card. Each card will use a 28-pixel padding, 28-pixel border radius, and a 380-pixel minimum height with a centered flex column layout.

A pill tag labeled "Sunny", "Rain", "Snow", or "Storm" will sit above each card. The card layout will use a 150-pixel icon area with natural text flow rather than forced alignment. Cards will carry a soft outer shadow and a faint white inset highlight. The page title will be an h1 and each city name an h2. No JavaScript is needed for focus states since there are no interactive elements.

The lightning bolt will be drawn as a single clipped polygon element with a yellow gradient and soft glow. It will sit slightly right of center beneath the storm cloud so the darker cloud lets it pop. A second smaller delayed bolt may be added for extra drama. The rain icon will use a cloud made of overlapping translucent puffs with falling drops.

The rain cloud will bob slightly via a vertical bob animation. The storm icon structure is being drafted with a cloud base, falling drops, and a lightning bolt. The sun icon markup is being written with a core and rotating rays.

The sun icon markup is now complete with six rays, a pulsing halo, and a core shine. The page header will use an eyebrow label, a main title, and a subtitle. The layout is being checked against a 1280×800 viewport to ensure the cards are fully visible on first paint.

The cards are being sized to fit fully within an 800-pixel viewport. The header, body padding, and card spacing are being calculated to prevent the bottom cards from being cut off in the screenshot.

The card layout is now fixed at roughly 350 pixels tall. The container will be 1160 pixels wide on desktop, giving each card 275 pixels. On mobile the cards will be 343 pixels wide. The font choice is shifting toward a modern system UI sans-serif for reliability.

The font stack is finalized as a modern system UI sans-serif. Temperature text will use tighter letter-spacing and a heavier weight. Rain drops will be light cyan with a subtle glow. Snowflakes need a blue tint or shadow to remain visible against the snowy card's light background.

A soft radial gradient backdrop will be added behind each icon to keep symbols readable across all card colors. Snowflakes will be white with a faint blue shadow, and the lower portion of the snowy card will shift toward a deeper blue.

The snow icon stage will use a pale blue radial gradient so flakes remain visible against the light background. Snowflakes will be white with a soft blue shadow and a faint white glow. The storm icon stage will stay slightly lighter so the bolt remains bright against the dark card.

The rain icon will use a medium blue circle with a white cloud and blue-white drops. A ground line or puddle was considered but skipped to avoid clutter. The rain cloud will bob vertically while the falling drops remain independent, so their transforms do not conflict.

The sun icon will be 120 pixels wide and tall. Its six rays will rotate continuously via a 16-second linear keyframe loop. Each ray is a 5-by-16 pixel gradient bar anchored at the center of the sun, with its transform origin set below the center so the rays spin outward from the core.

The sun rays are being repositioned to sit just above the sun's center. Each ray is now 5-by-14 pixels, placed at the top edge with a transform origin at 2.5px by 50px so the rays spin outward from the core.

Twelve sun rays will be spaced at 30-degree intervals around the core. The parent container will rotate the entire group while each ray holds its own independent angle. The sun core will sit above the rays so they appear to emerge from behind the center.

The sun core will use a warm radial gradient with a soft yellow glow and a pulsing animation. A second halo layer will pulse behind the core for extra depth. Eight longer rays will rotate in one direction to keep the sun burst dynamic. The storm card will use a pseudo-element to flash a bright lightning bolt.

The storm card’s pseudo-element will use a soft yellow glow that pulses every 3.2 seconds. The card itself needs relative positioning and overflow hidden so the flash stays contained. Overflow hidden does not clip the card’s own box-shadow, so the hover lift remains visible.

Icons will stay fully inside the card boundaries so overflow:hidden does not clip them. A prefers-reduced-motion media query will disable all animations and keep the storm bolt fully opaque.

A condition word will be added to each card description so the weather is still readable while an icon is mid-animation. Temperature text will use a smaller degree symbol, with negative signs for cold temperatures. The page will prevent horizontal scrollbars with overflow-x hidden and strict box-sizing. A footer credit is being omitted to keep the layout clean.

Descriptions will stay to one or two lines. A grain texture or colored top accent was considered but skipped to keep the design clean. All cards will share the exact same inner structure so the grid stays uniform. A location pin icon was also rejected to avoid extra clutter. The hover lift will use only a vertical shift and a soft shadow, without any color filter.

Rain drops will be teardrop-shaped with a soft blue gradient and a faint white glow. Their heights will vary via nth-child scaling for a natural look. Snowflakes will be drawn as six-point stars using a single element plus two rotated pseudos.

Snowflake drift will be driven by a single shared keyframe that combines vertical translation and rotation. Each flake will receive a unique delay so the swarm does not move in perfect unison.

Three drift variants are planned for the snowflakes: sway-left, sway-right, and sway-straight. The rain drops and snowflakes will start at zero opacity so they remain invisible on first paint until their keyframes begin.

Negative animation delays will keep rain drops visible on first paint by placing them mid-fall at load. The storm cloud will use a dark blue gradient with inset shadows to create depth and dimension.

A tiny drifting cloud will be added to the sunny card to add subtle movement. It will use a horizontal drift keyframe.

The drifting cloud wisp is being dropped to keep the sun icon clean and uncluttered. The page body will use a centered flex column on desktop to compose the layout in the screenshot, switching to top alignment on mobile so the cards do not feel cramped.

The two-column breakpoint is set between 700 and 1100 pixels. At 800 pixels wide the grid could exceed the 800-pixel viewport height and clip cards, so the layout will be optimized for the 1280×800 screenshot target. Intermediate widths will still avoid horizontal scroll.

The grid will use minmax(0, 1fr) to prevent overflow at narrow widths. At 900 pixels or below it will switch to two columns, and at 560 pixels or below to a single column. The description text will use a 0.92rem font size and a 1.45 line height to keep it compact.

City names will stay short and avoid overflow. Text colors are now fixed: dark brown for sunny, deep blue for rain, slate blue for snow, and near-white for storm. A tag pill style with uppercase letter spacing and a translucent background is being added.

The header will use a bold 2.4rem title with tight letter spacing and a subtle subheading in pale blue. A decorative rule or dot row may sit beneath the title. The design is now fully defined and ready for the final CSS.

The output will be a single fenced code block with no surrounding text. Unicode symbols and emoji are allowed as text, not icons. The storm card will use two overlapping lightning bolts: a main bolt and a smaller secondary bolt with staggered timing.

A soft radial gradient shadow will sit beneath each icon to ground the floating elements. Rain drops will fall with a smooth ease-in acceleration curve. Cards will use a faint white border at 28% opacity.

The storm card will use a rich indigo-purple gradient with a soft purple rim light so it remains visible against the dark page background. Its border and box-shadow will use translucent purple tones. The sunny card will glow warmly against the dark background.

Each card icon will sit inside a 148-pixel stage container. The sun icon is centered with a 118-by-118 pixel element offset by negative margins. The cloud icon will be placed in the upper-middle of the stage with precipitation elements positioned below it. The goal is to keep the visual weight of all four icons balanced across the cards.

The rain cloud will sit at the top of the stage with drops falling from below it. The storm cloud and bolt will also fit entirely within the stage bounds. A static sparkle effect will be added to the snow icon alongside the animated flakes.

I will use span elements instead of italic tags for the sun rays to avoid default styling. Empty elements will be kept in the HTML markup. I am checking that clip-path and other modern CSS properties are supported in the latest browsers. Since there is no JavaScript, the code will be kept clean and focused on visual quality.

The four weather cards will display Lisbon, Seattle, Helsinki, and New Orleans with temperatures of 28°C, 11°C, −4°C, and 23°C. Each card will carry a short description matching its weather condition. No focus rings or interactive controls will be added.

The card layout will place the tag above the city name, followed by the temperature and description. City names will use 1.35rem bold, while temperatures will use 3.2rem semibold with tight letter spacing.

A thin white gradient highlight will sit at the top of each card via a `::before` pseudo-element. The degree symbol will use a 1.1rem semibold font, and descriptions will be capped at 22 characters with muted opacity.

The sun icon will combine a soft conic-gradient glow with twelve individual ray bars. The glow will be created by a pseudo-element on `.sun` using `repeating-conic-gradient` and a radial mask to hide the center.

The sun icon will rely on twelve HTML ray spans as the primary visual element, with a soft radial-gradient halo as a subtle secondary glow. All animations will use only transform and opacity for optimal performance.

The page background will use three overlapping radial gradients in warm gold, pale blue, and soft purple to create depth behind the cards. The lightning flash will rely on opacity and box-shadow rather than CSS filters to keep the animation lightweight.

The grid will be constrained to 1180 pixels wide so the cards do not overflow the viewport. The hover lift will use only a vertical translation to avoid any risk of horizontal overflow.

A low horizon gradient will be added inside each card to create depth. The degree symbol will be written as a direct UTF-8 character, and the minus sign will use the Unicode minus character. The design is now fully finalized.

Rain splash dots were considered but skipped as too busy. The storm lightning bolt will be drawn as a clip-path polygon with a classic zigzag shape. A smaller secondary bolt will sit beside it, scaled down and timed to flash at a different interval.

Cloud icons will be built from shared `.cloud` classes with a base shape and overlapping puff elements. Each cloud will bob vertically via a 4.5-second ease-in-out loop. The puff elements will use `border-radius: 50%` to form rounded cloud shapes.

A CSS custom property will set each cloud’s base color. The storm cloud will use a vertical gradient for depth. A highlight puff will be added to the storm cloud.

The rain icon will use a 90-pixel container with three vertically stacked drops. Each drop is a 3-by-11 pixel white gradient bar with staggered delays and heights to create a natural falling pattern.

The rain drop animation will use a 58-pixel vertical travel distance with a 15% opacity fade-in and 80% opacity fade-out. Five drops will be staggered across the container using negative delays so they appear continuously. For reduced motion users, the drops will remain fully visible at their starting positions without any transform or animation.

The snowflake container will be 110 by 74 pixels. Each flake is a white circle with a soft glow and a subtle blue shadow. The drift animation lasts 3.2 seconds. Star-shaped flakes will have a centered cross.

The star-shaped snowflake will be drawn with a central 2-by-14 pixel bar and two 60-degree rotated pseudo-elements so the arms meet precisely at the center.

Dot-shaped snowflakes will join the star flakes for visual variety. The drift animation will use translate3d for smoother GPU rendering, starting with a slight upward shift and a 10% opacity fade-in.

The drift animation will use two staggered keyframe sets so the flakes travel in slightly different paths. The snow stage background will be tinted blue to keep the white flakes visible against the card.

A few snowflakes will be tinted pale blue and given a soft blue shadow. The card gradient runs from white at the top to blue at the bottom so the lower icon area stays visible. The lightning bolt is drawn as a 26-by-48 pixel element with a yellow-to-gold gradient, a clip-path polygon shape, and a drop-shadow glow.

The main lightning bolt will flash every 2.8 seconds with a precise opacity keyframe sequence. A smaller secondary bolt will sit beside it with a staggered delay and longer duration. The sky background will flash in sync with the lightning to create a dramatic storm effect.

The sun icon will use twelve 4-by-16 pixel gradient bars positioned at the top center of the sun. They will rotate continuously via a 18-second infinite spin animation. The transform origin is calculated to match the sun’s center point.

The sun core is a 54-pixel radial gradient with a soft gold-to-orange glow and a subtle yellow halo. It pulses every 3.2 seconds. A small white highlight sits at the top center of the core.

The sun core will pulse by scaling up to 1.06 and back. A soft golden halo ring will sit behind the core and pulse in reverse. Clouds will bob vertically by five pixels without leaving the card stage.

Each card will cast a colored hover shadow that matches its weather: warm orange for sunny, blue for rainy, cool gray for snowy, and purple for stormy. The decorative icon will be hidden from assistive technology with `aria-hidden`, and the card will carry a descriptive `aria-label` reading out the city, weather, and temperature.

The page title will be "Today's Outlook" with a subtitle about four different skies. The card grid is sized so the large temperature text fits comfortably within the 275-pixel card width.

A mobile breakpoint at 560 pixels will shrink the page title to 1.8rem and the temperature to 2.8rem. No footer note will be added to avoid wasting space on first paint. The sun rays are fully contained within the 118-pixel icon circle, so the rotating animation will not cause horizontal overflow.

A subtle animated gradient shift on the cards was considered but rejected to avoid gaudiness and respect reduced motion. The rain card will instead use a pseudo-element to draw faint diagonal streaks across its stage background.

The diagonal streaks behind the rain cloud were abandoned as too messy. Six explicit drop elements will replace them. Seven snowflakes will be used. A thin divider between temperature and description is being considered. A small colored dot beside each city name is also being considered.

The card layout is now fixed. The weather tag will use wide uppercase letter-spacing for an editorial look. The city name will be large and bold with tight letter-spacing. The temperature will sit at 3.4rem with a short line height. A thin 36-by-3 pixel rule will separate the temperature from the description.

The temperature unit will sit slightly above the main number as a superscript. The storm card’s lighter purple gradient top was checked for readable white text.

White text contrast on the storm card’s lighter purple gradient is roughly 7:1, which is acceptable. The sunny card’s dark brown text on gold and the rain card’s dark text on light blue are also being checked for readability.

The rainy card gradient is being lightened so its text zone stays readable. The snow card will use a white-to-blue gradient with dark blue text. The sunny card will use a gold-to-orange gradient with dark brown text. The storm card will keep its dark purple gradient with light text.

The storm card’s gradient is now a deep purple-to-black scale with light gray text. A soft golden radial glow will pulse with the lightning flash. The design is finalized and ready to code.

A soft page vignette was considered but skipped since the cards already use radial gradients. The reduced-motion media query will keep decorative elements visible without transforms. Sun rays will remain in their rotated positions, lightning will stay fully opaque, and rain drops and snowflakes will be distributed vertically so the icons still read. Cards will look fine on touch devices without persistent hover states. The cursor will be set to default since these are not links.

The four city descriptions are now unique and weather-specific. The grid will use percentage widths and max-width to avoid overflow. Box-sizing is set to border-box. Webkit font smoothing is enabled for sharper text.

The storm card’s lightning bolt will rest at 0.55 opacity so it remains visible at all times, flashing to full brightness during each strike. The keyframe sequence now uses precise opacity steps: 0.55 at rest, 1 at peak, 0.3, 1 again, 0.5, and 0.4.

A subtle white highlight will be added to the storm cloud’s second puff via a pseudo-element, kept at lower opacity than the other clouds. The cloud shapes will use three distinct elements: a wide rounded base, a medium left puff, and a smaller right puff.

The storm cloud icon is now defined with three overlapping elements: a wide rounded base, a large center puff, and a medium-right puff. They stack at z-index 1 and 2 so the seams stay invisible. A subtle blue drop-shadow will sit behind the whole cloud.

The storm cloud will cast a dark drop-shadow behind it. The lightning bolt sits above the cloud at z-index 3 and overlaps its bottom edge so it appears to strike from within the cloud. The cloud’s filter and the bolt’s transform will not conflict.

The storm cloud will sit at z-index 3 and the lightning bolt at z-index 2 so the bolt emerges from behind the cloud. Rain drops and snowflakes will start at the cloud’s bottom edge so they fall below the cloud visually.

The stage height is fixed at 162 pixels for all cards to keep the icons aligned. Rain drops will start 78 pixels from the top so they appear to fall from behind the cloud. Snowflakes will start 74 pixels from the top. A faint elliptical shadow will sit at the bottom of each stage. The file is ready to be written.

The responsive grid will use two columns below 960 pixels and one column below 560 pixels. Four columns will appear above 960 pixels to keep the layout safe even if a scrollbar reduces the available width. The cards will be vertically centered at a 1280 by 800 viewport.

The card height is roughly 400 pixels. Combined with the header and page padding, the total layout fits comfortably within the 800-pixel viewport. Cards will not use a fixed minimum height; instead, their content height will define the row, and the grid will stretch them to match.

The storm description is finalized. Extra weather details like humidity were considered but skipped to avoid filler. The no-script rule is being double-checked to ensure no inline handlers or JavaScript URLs remain. Font weights will be set to 600 or 700 for strict CSS validity. A decorative header icon was considered but rejected in favor of a clean typographic title.

A visible afternoon forecast label will be added for context. A soft radial gradient behind each icon will create a sky window effect. The storm stage will use a distinct gradient.

The storm stage will use a soft golden radial glow behind the icon. The sunny card’s warm highlight will stay static; the core sun animation alone provides enough motion. Rain drops will use a deep blue gradient with a faint white inset to remain visible against the light blue background.

Rain drops will be four pixels wide with a two-tone gradient: a white left edge blending into a deep blue body. Snowflakes will be pure white with a pale blue disc behind them and layered over the bluer lower gradient.

The snow stage will use a soft blue radial gradient behind the icon. Star-shaped snowflakes are being thickened to three pixels and given a bright white glow so they remain visible against the pale blue background.

The star-shaped snowflakes will use three-pixel bars with matching pseudo-elements to form a clean cross. Dot flakes will be six to eight pixels wide for visibility. Larger foreground flakes and smaller background ones will create depth. The file will be complete HTML with a doctype, head, and body.

A slight yellow inner glow will be added to the storm cloud’s bottom edge where the lightning bolt emerges. A few rain drops will also be added to the storm card so the icon feels more complete.

The layout is being validated at a 1280-pixel viewport to ensure the four-column grid fits comfortably within the page. Cards will not use a fixed minimum width. A meta theme-color tag and selection color styling were considered but skipped to keep the file lightweight. The animation names are finalized as spin, pulse, bob, fall, drift, drift-alt, flash, and skyflash.

A flaw was spotted in the reduced-motion override: forcing animation-duration to 0.01ms and iteration-count to 1 would snap rain drops and snowflakes to their final keyframe state, which is fully transparent and translated downward, leaving them invisible. The storm bolt’s resting opacity of 0.55 would remain visible, but the falling and drifting icons would vanish entirely.

The reduced-motion override will explicitly disable all animations and transitions instead of forcing a near-zero duration. Rain drops and snowflakes will be pinned to a visible static opacity of 0.9 with fixed vertical positions so they remain visible. The lightning bolt will stay fully opaque at 1.0.

The reduced-motion override will also disable the hover lift and shadow transitions. A sudden jump on hover is preferable to a jarring transition for users who need reduced motion.

A subtle golden box-shadow will be added to each sun ray to increase its luminosity. The rays will also vary in length to create a more natural, organic look. The browser tab title will be set to "Weather Cards". The HTML file is now ready to be composed.

A slow background pulse was considered but rejected as too distracting. Cards will use a 24-pixel border radius with slightly inset content to keep the icons from feeling cramped. Country labels were also dropped to avoid clutter. The HTML file is now being drafted.

The header will feature an eyebrow label, a title, and an immersive lede about four cities and four different afternoons. The HTML structure is now fully drafted.

City names will use h2 elements. The stage wrapper will carry aria-hidden="true". Print styles are unnecessary. Dark text will be used for better readability on the warm gold gradient.

A travel poster aesthetic is being adopted for the cards. Deep terracotta text will contrast with the warm gold gradients. Georgia, Iowan Old Style, and Palatino will serve as the refined serif typeface for city names and condition labels. Temperature and UI elements will use a system sans-serif stack.

The header title will use a 2.6rem regular Georgia with tight negative letter spacing. Header text will be a warm off-white to avoid clashing with the sun card.

A header sun icon was considered but skipped to avoid redundancy with the card animations. The storm card will use a deep box-shadow for depth, and the flash effect will rely on an ::after overlay rather than animating the shadow itself. Rain splashes were also rejected as too complex and hard to read.

The minus sign will use the HTML entity `&minus;` for proper typography. The exact HTML element structure for each weather stage is being mapped out, starting with the sunny card’s nested sun, glow, rays, and core divs.

The rain stage markup is now fully drafted. It uses a cloud container with three puffs and a base, plus six individual drop spans. The snow stage markup is also being structured with a cloud container and puffs.

The snow stage markup is now fully drafted. It uses a cloud container with three puffs and a base, plus a flakes container with seven alternating star and dot shapes. The storm stage markup is also being structured, using a cloud container with four individual drop spans.

The storm stage markup is now complete. The bolt element is placed before the cloud in the DOM so the cloud paints on top, and the cloud precedes the drops so the cloud covers their origins. The storm drops will be offset to the sides so they do not hide behind the bolt.

The storm drops will be positioned at left offsets of 0, 18, 70, and 84 within their container. They will use a light blue-to-white gradient with a 0.75-second animation. A ground flash effect is being added as a thin glowing ellipse beneath the lightning bolt.

The storm bolt will be rotated eight degrees for a dynamic look. The ground flash will use a soft blur filter and a slow opacity pulse.

The small lightning bolt will be rotated minus fourteen degrees and scaled down to eighty-five percent. It will remain fixed while the cloud bob animation moves the cloud up five pixels, revealing more of the bolt beneath. The CSS will be kept compact but readable, with a focus-visible reset added. The body will use a full viewport flex column layout.

A flexbox centering bug on short mobile screens was spotted: `justify-content: center` can clip the top of the page when content overflows the viewport. A media query will disable centering on viewports below 760 pixels tall or 960 pixels wide to prevent the header from becoming unreachable.

The header is estimated at roughly 100 pixels tall. Each card is being measured to see if four stacked cards could exceed the viewport height and trigger the flexbox centering bug.

The card height estimate is 387 pixels. Four cards plus header and gaps total roughly 569 pixels, well under the 800-pixel viewport. This confirms the flexbox centering will not clip the header. On mobile the first card will be fully visible on first paint. A subtle white text shadow will be added to the temperature text for depth.

A subtle golden text shadow will be added to the storm temperature. The rule bar will widen on hover as a micro-interaction, and the grid will be capped at 1160 pixels wide with an 18-pixel gap.

`min()` is confirmed safe for the latest Chrome. Cards will use `overflow: hidden` and a 26-pixel border radius to keep all animations and overlays fully contained. A subtle paper texture was considered but rejected to avoid muddying the gradients.

The temperature display will use a clear "°C" suffix. The final color palette is now locked: a deep midnight blue page background, warm off-white header text, and muted gray accents. Each weather card will carry its own gradient: gold and amber for the sun, soft blue for the rain, pale blue for the snow, and deep purple for the storm.

The storm card text will use a pale blue shade. Each card will gain an inner white highlight via an inset box-shadow to create a glass edge. The hover lift will use a 0.4-second cubic-bezier transition, raising the card 12 pixels and deepening the outer shadow. The full box-shadow must be restated on hover to preserve the inset highlight.

The sun rays will rotate over 18 seconds. The reviewer will likely see the live iframe, so the motion will be visible there even if the automatic screenshot is a still image.

The sun rays will rotate every 10 seconds so the motion stays clearly visible. Rain drops will fall over 1 second, snowflakes will drift over 3.5 seconds, and the lightning flash will pulse every 2.4 seconds so at least one bolt appears within the three-second watch window.

Snowflake sizes will vary through nth-child selectors instead of extra classes. The storm cloud will be darker and larger than the other clouds, with drops positioned to remain visible beneath it. The storm drops will share the same fall animation as the rain drops but use a distinct color override.

A faint ring will be added around the sun for extra polish. All cards, text, and icon cores are rendered immediately in the HTML, so nothing is hidden until animations begin. Because the CSS is inline in the head, there will be no flash of unstyled content. The document will also declare `color-scheme: dark` to match the dark theme.

The city names are being weighed against the narrow four-column grid. At 960 pixels wide each card is roughly 214 pixels, so longer names like New Orleans might wrap. Miami is being considered as a shorter alternative to avoid text overflow.

The four city names are now fixed as Lisbon, Seattle, Helsinki, and Miami. Each description will wrap naturally with a 26-character maximum width, keeping the text inside the narrow card columns.

The description text will use `text-wrap: pretty` instead of a fixed character limit, letting it fill the card width cleanly without overflow. A gradient-colored page title is also being added.

The page title will use a gradient text effect with a fallback color. A `@supports` guard will ensure the gradient only applies when `background-clip: text` is supported, preventing invisible text on older browsers.

A gold uppercase eyebrow label in a system font will sit above each card. The lightning clip-path is being mentally checked against a grid to confirm it reads as a bolt rather than a random polygon. No legend will be added.

The lightning clip-path is confirmed as a classic zigzag bolt. The small bolt will reuse the same clip-path and scale via width and height. `will-change: transform` was skipped to avoid memory overhead. Motion blur is impossible in a static screenshot, so staggered positions will create the illusion of movement. A small orbiting dot around the sun is being considered to imply motion even in still frames.

The orbiting sun dot idea was dropped because a still image cannot imply motion. A soft radial-gradient ellipse shade will sit at the bottom of each cloud to bob with it, giving a grounded shadow effect. The storm cloud shade will be darker. Cloud puffs will layer above the shade.

The storm cloud will use a single solid color with a subtle highlight pseudo-element instead of per-element gradients. This prevents patchy seams where the cloud backgrounds might not align.

The center cloud puff will carry a top highlight to create volume. Rain and snow clouds will use a bright white highlight on the center puff, while the storm cloud uses a much subtler white glow. The pseudo-element is confirmed to sit correctly inside the rounded puff without clipping.

The gold eyebrow label passes contrast checks against the dark background. Each weather description will use a solid color instead of opacity to preserve readability. The final file is ready to be written.

A subtle shimmer will be added to the sun core by animating its background-position over a larger background-size.

The sun core will pulse via a radial gradient animation. Twelve longer rays will form the main rotating set, with eight shorter counter-rotating dashes layered behind for a richer effect.

The inner ray ring will rotate in reverse over seven seconds. Eight shorter dashes sit just outside the sun core so they remain visible behind it.

The sun will bob gently on top of its rotating rays for a living feel. Each cloud will bob at a different speed so the cards do not stay in sync.

The sun stage will receive a warm ground shade at the bottom, while the other three cards will use a cool shade. This shade sits as a static sibling to the bobbing cloud, so it stays fixed beneath the floating cloud for a grounded effect. The sun animation will also be disabled when reduced motion is preferred.

The sun bob will stay fully inside the stage with 21 pixels of clearance. The final font stack uses system sans-serif and Georgia. CSS variables will define the typefaces. A media query for very small heights was considered but skipped as unnecessary.

Card padding is set to 20px by 18px by 22px. The sun icon will be 118px to remain prominent inside the narrow cards. A small colored dot will sit beside each tag, using a pseudo-element with a white glow.

A thin white gradient sweep will animate across the sunny card via a pseudo-element to create a lens-flare effect. The tag and dot colors are finalized.

The sheen sweep will travel across the sunny card at a 5.5-second interval. It will be clipped by the card’s overflow hidden boundary.

A slow mist effect was considered for the rain card but skipped to keep the icon clear. The snow card will gain three static sparkles that twinkle between falling flakes, using a 2.4-second ease-in-out pulse.

The snow sparkles will sit in the upper stage near the cloud edges, using staggered delays so they do not all pulse together. The twinkle keyframe scales each sparkle from 0.8 to 1.2 while fading opacity. The developer is keeping the effect subtle to avoid visual clutter.

The header will stay compact so the cards remain the visual center. The grid will use default stretch alignment to equalize card heights, with descriptions top-aligned and possibly bottom-aligned via flex margin-top auto.

The developer decided against using `margin-top: auto` on the descriptions. Equalizing card heights with flex would leave awkward gaps between the weather rule and the description when content lengths differ. Keeping the descriptions in natural flow is tighter and cleaner.

The four weather descriptions are now finalized at roughly equal length to keep card heights uniform. The developer will also add a viewport meta tag and avoid 100vw units to prevent horizontal scrolling.

A slowly shifting body gradient was considered but rejected in favor of a static background. A faint horizon line was also briefly considered.

Georgia italic will be used for city names to give a poster-like feel. The temperature will appear in a large condensed sans serif. A small time or day label under the description was considered but rejected as redundant.

A high/low temperature range line will be added beneath each description. It uses plain text labels instead of icons, giving the cards a more realistic weather-widget feel. The four cities will show their respective high and low temperatures.

The range row will use a 0.78rem font-weight 600 with wide letter-spacing and 80% opacity. The developer confirmed the extra line fits the card height budget and decided to keep it for a richer weather-widget feel. They are now deciding whether to place the temperature before or after the city name in the card layout.

The card layout is now set. The icon sits at the top. The temperature is the largest text element. The city name appears below it as a caption. The high and low range sits above the description. The description follows.

The tag will sit above the city name rather than beside the temperature. The high and low range will be separated by a small dot character.

The developer is finalizing the file now. They will use `lang="en"` and HTML entities for the degree and minus signs to prevent encoding issues. They are also checking that no script tags or JSON-LD appear anywhere in the markup.

The storm card’s lightning flash will use a brief white overlay at 0.22 opacity. It will sit above the text but remain readable. The sun sheen will also use a narrow white band at 0.28 opacity. To keep text readable, the sheen pseudo-element will be placed behind the card content with a lower z-index.

The sheen sweep will sit behind the card content so the text stays solid on top. A `position: relative` rule will be added to all card children so the z-index stacking works correctly. The storm lightning flash will instead sit in front at low opacity for a more dramatic effect.

The rain and storm cards will both use a `.drops` class, so their absolute positioning must be kept separate. The cloud will sit at z-index 2 and bob at 4.4 seconds. The lightning bolt will layer at z-index 1.

The sun icon will be 120 pixels wide and bob at a 6-second interval. The shade element sits at z-index 0. Rain drops will use staggered delays and varied opacity to look like a natural shower rather than a synchronized line. The rain card will use six drops and the storm card four.

Seven snowflakes will fall, with the fourth one enlarged and slowed to sit in the foreground. The developer is now finalizing the CSS and double-checking the sun icon’s transform-origin math.

The sun icon’s inner rays will be counter-rotated and slightly lighter than the outer rays. The core will be 56 pixels centered in the 120-pixel box. The spin keyframe will rotate the sun 360 degrees. The bob animation is next.

The bob keyframe will shift the sun and cloud up by six pixels. The sun core will pulse by scaling to 1.07. The glow pulse will reverse so the core breathes opposite to the glow.

The sun glow will sit at z-index 0 as a sibling element, unaffected by the core’s scale animation. The core itself will layer at z-index 2 above the rays. A soft golden box-shadow ring will be added to the core to enhance its luminous appearance.

The developer noticed the yellow sun rays could blend into the warm gold card background. They are weighing a darker backdrop behind the sun, a stronger white-hot glow, or a darker edge to the card to keep the icon visible.

A soft white disc behind the sun will anchor the icon against the warm gold card. The sun core will use a white-hot gradient from #fffef6 to #ff9f1c. The rays will start white with gold tips and a bright white glow so they remain visible.

The rain cloud will use a white fill with a subtle gray-blue inset shadow on its circular puffs to define edges against the light blue sky. The storm cloud will sit lighter than the dark card background so it reads as a cloud while still feeling stormy.

The storm card top will be lightened slightly to avoid a muddy appearance while keeping text white. Rain drops will sit below the white cloud against the light background. A subtle inset shadow will define cloud edges, but individual puffs will not receive a border to prevent visible seams.

Cloud groups will use a single drop-shadow filter to outline the combined shape without per-puff borders. Rain and snow clouds get a soft blue shadow, while the storm cloud gets a darker one. The developer confirmed that drop-shadow filters and CSS transforms can coexist on the same element. They are now writing the complete file and adding a main landmark with a visible heading.

The sheen sweep will travel from left to right across the card, fading in and out over a 5.5-second cycle. At the 3-second mark it sits in its invisible phase, so the card appears clean in static screenshots. The developer decided against adding a skip navigation link. They also confirmed that the three cloud drop-shadow filters will not cause performance issues.

The developer is adding a mobile breakpoint at 560 pixels. The grid will switch to two columns between 561 and 960 pixels. Cards will stay wider in that range. The mobile layout will use smaller fonts for the heading, lead text, temperature, and city name. They are also considering a two-by-two grid near 800 pixels.

The developer calculated the exact card dimensions and confirmed that at 800 pixels the two-column layout will push the bottom cards below the fold. This is acceptable because the judging viewport is 1280 by 800 pixels, where four cards still fit. Between 961 and 1280 pixels the grid will use four columns, yielding roughly 214 pixels per card. They are also verifying how the grid width behaves as a flex item within the body container.

The developer refined the responsive breakpoint to 980 pixels. Four columns will only appear when the viewport is wide enough, and the grid will switch to two columns at narrower widths to keep text readable.

The developer finalized the responsive breakpoints: two columns below 980 pixels and a single column below 560 pixels. They verified that even at 375 pixels the cards remain comfortable with centered icons and no overflow. They also checked that long temperature strings like "−4°C" fit within the narrowest card widths.

The temperature will use a clamp of 2.4rem to 3.3rem so it stays readable on narrow viewports. The city name will remain fixed at 1.5rem. The lead text will be capped at 36rem wide to prevent overflow.

A decorative row of four tiny colored dots will sit beneath the header to represent the four weather types. Each dot will be an 8-pixel circle with a distinct background color and soft glow, styled purely with CSS.

The storm dot will use a purple background. The developer is now writing the final code. They will add a `prefers-reduced-motion` override that hides the sun sheen, spark flashes, and lightning glow. All icons are built with CSS only, with no external URLs or SVG.

A blurred white circle behind each icon will create a unique sky mood for every card. The rain stage will use a soft white radial gradient. The snow stage will layer a bright white center with a pale blue edge. The storm stage is next.

The storm stage will use a faint yellow radial gradient. The developer is now finalizing the content: four cities with high and low temperatures and descriptive weather copy for each card.

The four weather tags will be Sunny, Rainy, Snowy, and Stormy. Aria-labels will be omitted to avoid double announcements, and the icon will be marked aria-hidden. The developer is also considering a more obvious lightning bolt shape to prevent clipping issues.

The lightning bolt will be drawn with clip-path on a single HTML span, avoiding extra divs. A bright white core line will be added via a pseudo-element to make the bolt more visible.

The developer decided against adding a bright white core line to the lightning bolt; the gradient alone is sufficient. The flash animation will only vary opacity, leaving the existing drop-shadow filter untouched. They are now beginning to style the storm card's skyflash pseudo-element.

The storm card's skyflash pseudo-element will use a radial gradient with a warm yellow center fading to transparent. It will animate in a 2.6-second ease-in-out loop that fades in and out to match the lightning bolt's timing.

The small lightning bolt will use a negative animation delay so it flashes in immediately alongside the main bolt. Both the bolt and the skyflash will share the same 2.6-second timing values for a unified effect. The developer is now writing the complete file and checking for syntax errors.

A subtle golden selection highlight will be added for polish. Cards will start with an explicit `translateY(0)` transform so the hover lift transitions from a defined baseline. The reduced-motion override will strip the hover transform entirely.

The reduced-motion override will be placed at the end of the stylesheet so it overrides the hover transform. Six raindrops will be added for depth, and the storm card's skyflash pseudo-element will be positioned at z-index 3. Snowflakes will use a slightly blue-white tint, and star-shaped flakes will receive a subtle blue drop-shadow for definition.

The developer confirmed that a drop-shadow filter applied to the parent element will outline the star-shaped snowflake's pseudo-elements as well. Dot flakes will use a soft white glow with a faint blue border. The star shape itself is a 3-by-16 pixel vertical bar with a white background and a 2-pixel border radius.

Star-shaped snowflakes will use a 3-by-16 pixel bar with a 2-pixel border radius, while dot flakes will be perfect circles. The dot flakes will vary in size between 5 and 7 pixels. Their horizontal positions will be hardcoded in pixels within the 120-pixel container. The drift animation will travel 64 pixels across a 168-pixel stage. The sun icon will be 120 pixels wide and centered, sitting 17 pixels from the top of the stage.

The developer finalized the card dimensions. The stage height is set to 158 pixels. The total page height is about 590 pixels. This fits comfortably within the 800-pixel viewport. The sun icon will sit 11 pixels from the top of the stage.

The developer recalculated the stage height to 156 pixels and finalized the exact vertical positions for every element. Rain drops will start at 70 pixels and fall 58 pixels. Snowflakes will start at 68 pixels and fall 70 pixels. The lightning bolt will sit at 58 pixels with a 50-pixel height. The cloud will sit at 14 pixels with a 68-pixel height. The sun shade will end 4 pixels from the bottom. All coordinates fit cleanly within the 156-pixel stage.

The storm rain drops will fall faster and travel a longer distance. A second cloud layer was considered but rejected to keep the storm card clean and uncluttered. The developer is now finalizing the file and will include a page title.

A soft inner shadow will be added to the bottom of each card to ground the text. The animations will all use negative delays so they begin immediately.

A CSS variable will control each card's hover lift and shadow depth. The sun card will use a warm orange shadow that deepens on hover.

A 1-pixel white border with slight opacity will frame every card. The storm card will use a soft purple-tinted border instead. Card padding is finalized at 22 pixels on top and 24 pixels on the bottom, with 18 pixels on each side. The developer is now verifying that text colors remain readable against each card's gradient background.

The sunny card's orange gradient was lightened so the lower half stays bright. This keeps the dark brown text readable against the warm background.

The developer finalized the text colors for all four cards. Sunny text is dark brown on a warm orange gradient. Rain text is dark blue on a light blue sky. Snow text is dark blue on a pale blue-white background. Storm text is white on a deep purple gradient.

The developer finalized the sun card's text colors. The description and temperature range will use a solid dark brown on the warm orange gradient. They are now ready to write the code. A CSS-only wind indicator is also being considered.

The developer rejected the wind indicator idea. They added a dark background to the html and body elements to prevent any white flash during screenshot capture. The body will use min-height: 100vh to fill the viewport.

Horizontal overflow will be hidden on the html and body elements to prevent any horizontal scrollbar. The browser will still allow vertical scrolling when content overflows.

The developer realized that hiding overflow on the body element could clip the cards' hover shadows, since the lift pushes them upward past the card edges. They decided against applying overflow hidden to the html element to avoid this clipping.

The developer decided to add `overflow-x: hidden` to the html and body elements after all. They noted that the header sits above the cards, so any hover shadow that extends into the gap between them will not be clipped.

The developer confirmed that the hover shadow blur will not be clipped by the body padding, since the 46-pixel spread fits within the 60-pixel viewport margin. They decided to proceed with writing the code and will not add a visual note about reduced-motion support.

Sparkles will sit at the stage edges so they remain visible above the cloud. The storm card will skip distant stars since it is daytime. A puddle reflection ellipse will be added to the rain card, with animated ripples at the bottom of the stage.

The developer decided against adding a puddle reflection to the rain card, since a static reflection would look odd. They are now preparing to write the complete code. To make the set stand out, they plan to use an editorial serif and sans mix, a dark atmospheric page, layered animated icons, colored hover shadows, a lightning sky flash, a sheen on the sun, counter-rotating rays, travel-poster color grading, and a high/low temperature range.

A small region label will sit beneath each city name. The four locations will be Portugal, Washington, Finland, and Florida. The developer is now writing the CSS for the region text.

The region label will use uppercase small caps with wide letter spacing and a soft opacity. The developer will set a specific color instead of relying on opacity for contrast. The card height increases by 16 pixels, keeping the total page under 800 pixels. Default h2 margins will be reset to prevent layout issues.

Body line-height is set to 1.4. The region label will be slightly smaller so "Washington" does not wrap. The storm card will use Miami, Florida. The developer is ready to write the complete file in one pass.

The developer finalized the exact rotation angles for the sun icon's 12 outer rays and 8 inner rays. Even-numbered outer rays will be shorter at 11 pixels tall to create a staggered, layered effect.

The sun icon's inner rays will all be the same length, with only their rotation angles differing. A white-hot tip will be added to the odd rays using a brighter gradient. A soft white shine will sit on the core via a pseudo-element with a slight blur. A darker crescent will be placed at the bottom of the core to create a three-dimensional effect.

The sun icon will bob and spin together because its rays are nested inside the same element. The developer will add antialiased font smoothing to the body and is ready to write the complete file.

The sun card's sheen pseudo-element will start with `opacity: 0` and a hidden off-screen transform. This ensures it remains invisible when `prefers-reduced-motion` is active, since the keyframes only animate during playback.

The lightning bolt will sit at 0.7 opacity by default so it remains visible when reduced motion is active. Rain drops and snowflakes will start invisible and only appear once the animation keyframes run, unless reduced motion forces them visible. The developer also noted that CSS animations typically apply before the first paint when the stylesheet is in the head.

The developer noticed a flexbox overflow risk. Default `min-width: auto` on flex items can prevent the grid from shrinking below its content width. They will add `min-width: 0` to the main grid and header to fix this.

The header will use a lede line, an eyebrow label, a main title, and pips beneath. The developer is ready to output the complete file.

The main heading will use a warm-to-cool gradient to suggest the range of weather. A solid fallback color will be applied first, then the gradient will be conditionally enabled via an @supports rule so the text remains visible if background-clip text is unsupported.

The header will use a soft divider line beneath the title, relying only on the pips for visual separation. The developer is now writing the complete document.

The storm card's lightning bolt will be split into two elements. A larger bolt will sit slightly left of center and extend below the cloud. A smaller bolt will sit to the right and angle downward. Both will be partially hidden behind the cloud so the strike appears to emerge from within it.

A blurred yellow glow ellipse will sit beneath the storm bolt and flash with the sky animation. The developer noted that stage overflow will clip the blur slightly, which is acceptable. They are now finalizing the storm stage HTML.

The storm stage HTML is now fully defined. It includes a shade layer, four falling drops, two lightning bolts, a strike glow, and a cloud with three puffs and a base. The rain stage will follow the same structure but omit the bolt.

A shade layer will be added to every stage. Rain drops will use medium blue so they remain visible against the light card background, while storm drops will stay light so they stand out against the dark card. Each stage will carry a dedicated class—`rain-drops` or `storm-drops`—to apply the correct color and animation speed without duplicating shared styles.

The developer decided against adding extra hover effects like speeding up icon animations, since the card lift is sufficient. They will include a white highlight line on the cards that brightens on hover via opacity transition.

A box-sizing reset will be the first rule. The body font will be sans-serif, but the city name and description will use italic serif to create a travel-magazine feel. The description will be slightly smaller at 0.95rem.

Temperature values will use tabular numerals for consistent width. The degree symbol will sit as a small superscript next to the number, with a minus sign for negative temperatures.

The developer spotted a flexbox layout bug. The header shrinks to the width of its shortest child, so the lede line would wrap to a narrow width. They will add a max-width and centering fix to keep the header properly sized.

The header will be capped at 640 pixels wide and the grid at 1160 pixels, preventing flex shrink-wrap. The lede line will read "Four cities, four completely different afternoons." The developer is now writing the complete file.

The developer rejected adding subtle noise via box-shadows. They finalized the `prefers-reduced-motion` media query to strip all animations, transitions, and hover transforms, while forcing the lightning bolt to remain fully visible.

The reduced-motion override now forces rain and snow drops to a fixed visible position and removes their transforms. It also sets the storm strike glow to 65% opacity, the spark to 85% opacity, and hides the storm card sheen.

The developer finalized the exact vertical positions for the storm drops and snowflakes inside the reduced-motion override. They also removed the unused `.rule` class from the CSS and dropped the transition from the card highlight line.

The developer confirmed that clip-path works correctly on rotated elements. They verified that the small storm bolt preserves its initial rotation transform during animation, and that the main bolt’s rotation is set independently. They are now ready to write the final code.

A forced-colors media query will add a 1px border to cards so they remain visible in high-contrast mode. The card border-radius is set to 28px for a modern soft look. Spacing will follow a consistent scale of 4, 8, 12, 16, 22, and 28 pixels.

The developer decided against adding forced-colors support because the icons are background-based and would vanish in high-contrast mode. They are now finalizing the exact rain drop positions, delays, and durations before writing the complete file.

The developer finalized the exact drift positions and delays for the seven snowflakes, alternating stars and dots across the container. They also placed four tiny sparkles at specific offsets in the snow stage. They briefly wondered if the cloud might obscure those sparkles.

Sparkles will twinkle via opacity and scale changes. The snow cloud will sit slightly higher to leave more room for drifting flakes. A light blue tint will be added to the snow card icon area so the flakes stand out.

The developer realized the snow card’s white top would blend with the white cloud, so they are shifting the gradient to a soft blue palette—#d7e7f6 at the top fading to #f7fbff at the bottom—while keeping the text area pale for contrast.

The developer finalized the snow card gradient as a clear sky blue (#c5daf0) fading to pale white (#f8fbfe). This keeps the white cloud and flakes visible against the icon area while placing the text in the lower pale zone for contrast.

The rain card gradient is set to a sky blue top fading to a lighter blue bottom. White rain drops will be used so they remain visible against the upper blue stage.

The sunny card gradient is set to a deep amber sky fading to cream. The sun core will be a bright yellow-white against the orange top, while the rays stay white. Text will sit on the cream bottom in dark brown for strong contrast.

The storm card gradient is set to a deep purple-blue (#2a3158) fading to near-black (#14172a), with light text (#f4f6ff). The storm icon area will use a slightly lighter purple with a glow. The sun stage background is being refined with a radial gradient to create a soft white halo behind the sun.

The developer finalized the stage backgrounds with radial gradients. The rain stage uses a soft white glow at the top. The snow stage uses a brighter white glow. The storm stage uses a faint amber glow. The sun rays will remain white against the orange sky. The description text color is being lightened to improve contrast on the cream bottom of the sun card.

The developer finalized the description text colors for each card to ensure proper contrast against the background gradients. They also added a soft vignette at the top of the storm card to separate the cloud from the dark sky, and briefly considered adding a moon icon.

The city name will use 1.7rem Georgia with a small uppercase region label and negative letter-spacing. A viewport meta tag will be added for mobile. A pulsing dot will be added to the eyebrow line.

The eyebrow line now includes a pulsing amber dot. It uses a 7px circle with a soft glow that expands and fades in a 2.2-second loop. The dot remains visible even in a static screenshot.