Gemini 4 Hydrogen
by Googlereasoning defaultClean
Running live in a sandboxed frame. Click inside it before using the keyboard.
How it went
- Total time
- 1 min 10 s
- Cost
- $0.081
- Output tokens
- 10,663
- Spent thinking
- 1,601 tokens
- Speed
- 156.5 tok/s
- Console errors
- 0
- First token after
- 1.7 s
- First visible text after
- 11.0 s
- Prompt tokens
- 548
- Code size
- 24.5 KB
- Finish reason
- stop
- Served by
- Model id
google/gemini-4-hydrogen- Reasoning sent
model default- Max output
- 40,340 tokens
- Generated
- Nov 13, 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 · 1113 lines
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>Pure CSS Animated Weather Cards</title>
<style>
*,
*::before,
*::after {
box-sizing: border-box;
margin: 0;
padding: 0;
}
:root {
--bg-page: #0c1222;
--text-primary: #ffffff;
--text-muted: rgba(255, 255, 255, 0.78);
--card-radius: 26px;
--transition-card: transform 0.35s cubic-bezier(0.22, 1, 0.36, 1),
box-shadow 0.35s cubic-bezier(0.22, 1, 0.36, 1);
}
html {
font-size: 16px;
}
body {
min-height: 100vh;
font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
Helvetica, Arial, sans-serif;
color: var(--text-primary);
background-color: var(--bg-page);
background-image:
radial-gradient(circle at 15% 20%, rgba(251, 146, 60, 0.14), transparent 40%),
radial-gradient(circle at 50% 80%, rgba(56, 189, 248, 0.12), transparent 45%),
radial-gradient(circle at 85% 25%, rgba(139, 92, 246, 0.15), transparent 42%);
display: flex;
flex-direction: column;
align-items: center;
justify-content: center;
padding: 36px 24px;
overflow-x: hidden;
}
.page-header {
text-align: center;
margin-bottom: 36px;
max-width: 640px;
}
.page-header h1 {
font-size: clamp(1.65rem, 3vw, 2.25rem);
font-weight: 700;
letter-spacing: -0.025em;
margin-bottom: 8px;
background: linear-gradient(120deg, #ffffff 20%, #bae6fd 80%);
-webkit-background-clip: text;
background-clip: text;
color: transparent;
}
.page-header p {
font-size: 0.95rem;
color: rgba(226, 232, 240, 0.72);
line-height: 1.5;
}
.weather-grid {
width: 100%;
max-width: 1180px;
display: grid;
grid-template-columns: repeat(4, minmax(0, 1fr));
gap: 24px;
}
/* =========================
Card Base Styles
========================= */
.weather-card {
position: relative;
border-radius: var(--card-radius);
padding: 28px 24px 26px;
display: flex;
flex-direction: column;
justify-content: space-between;
min-height: 410px;
overflow: hidden;
border: 1px solid rgba(255, 255, 255, 0.22);
box-shadow:
0 18px 40px -12px rgba(2, 6, 23, 0.65),
inset 0 1px 0 rgba(255, 255, 255, 0.28);
transition: var(--transition-card);
isolation: isolate;
}
.weather-card::before {
content: "";
position: absolute;
inset: 0;
background: linear-gradient(
135deg,
rgba(255, 255, 255, 0.22) 0%,
rgba(255, 255, 255, 0.03) 45%,
rgba(0, 0, 0, 0.14) 100%
);
pointer-events: none;
z-index: 0;
}
.weather-card:hover {
transform: translateY(-12px);
box-shadow:
0 28px 52px -12px rgba(2, 6, 23, 0.8),
0 0 0 1px rgba(255, 255, 255, 0.35),
inset 0 1px 0 rgba(255, 255, 255, 0.4);
}
/* Card Weather Gradients */
.card-sunny {
background: linear-gradient(155deg, #f59e0b 0%, #ea580c 52%, #c2410c 100%);
}
.card-rainy {
background: linear-gradient(155deg, #3b82f6 0%, #1d4ed8 48%, #0f172a 100%);
}
.card-snowy {
background: linear-gradient(155deg, #7dd3fc 0%, #38bdf8 44%, #1e40af 100%);
}
.card-stormy {
background: linear-gradient(155deg, #312e81 0%, #1e1b4b 52%, #090d16 100%);
}
.card-top {
position: relative;
z-index: 2;
display: flex;
justify-content: space-between;
align-items: flex-start;
}
.location {
display: flex;
flex-direction: column;
gap: 2px;
}
.city {
font-size: 1.3rem;
font-weight: 700;
letter-spacing: -0.015em;
}
.country {
font-size: 0.78rem;
text-transform: uppercase;
letter-spacing: 0.1em;
color: var(--text-muted);
font-weight: 600;
}
.badge {
font-size: 0.72rem;
font-weight: 600;
padding: 5px 10px;
border-radius: 999px;
background: rgba(255, 255, 255, 0.18);
backdrop-filter: blur(6px);
border: 1px solid rgba(255, 255, 255, 0.22);
letter-spacing: 0.03em;
}
/* Icon Stage */
.icon-stage {
position: relative;
z-index: 2;
height: 158px;
display: flex;
align-items: center;
justify-content: center;
margin: 8px 0;
}
/* Bottom Info */
.card-bottom {
position: relative;
z-index: 2;
}
.temp-row {
display: flex;
align-items: baseline;
gap: 4px;
margin-bottom: 4px;
}
.temp {
font-size: 3.35rem;
font-weight: 700;
line-height: 1;
letter-spacing: -0.04em;
}
.unit {
font-size: 1.5rem;
font-weight: 500;
color: var(--text-muted);
}
.description {
font-size: 1rem;
font-weight: 500;
color: rgba(255, 255, 255, 0.92);
margin-bottom: 16px;
}
.meta-bar {
display: flex;
justify-content: space-between;
padding-top: 14px;
border-top: 1px solid rgba(255, 255, 255, 0.2);
font-size: 0.78rem;
color: var(--text-muted);
}
.meta-item {
display: flex;
flex-direction: column;
gap: 2px;
}
.meta-item strong {
color: #ffffff;
font-weight: 600;
font-size: 0.85rem;
}
/* =========================
1. SUNNY ICON
========================= */
.sun-icon {
position: relative;
width: 124px;
height: 124px;
display: flex;
align-items: center;
justify-content: center;
}
.sun-glow {
position: absolute;
width: 112px;
height: 112px;
border-radius: 50%;
background: radial-gradient(
circle,
rgba(254, 240, 138, 0.52) 0%,
rgba(253, 224, 71, 0) 70%
);
animation: sunPulse 3.6s ease-in-out infinite;
}
.sun-rays {
position: absolute;
inset: 0;
animation: spinSlow 16s linear infinite;
}
.sun-ray {
position: absolute;
top: 50%;
left: 50%;
width: 118px;
height: 6px;
margin-left: -59px;
margin-top: -3px;
}
.sun-ray::before,
.sun-ray::after {
content: "";
position: absolute;
top: 0;
width: 16px;
height: 6px;
border-radius: 999px;
background: linear-gradient(90deg, #fef08a, #fde047);
box-shadow: 0 0 10px rgba(254, 240, 138, 0.7);
}
.sun-ray::before {
left: 0;
}
.sun-ray::after {
right: 0;
}
.sun-ray:nth-child(2) {
transform: rotate(45deg);
}
.sun-ray:nth-child(3) {
transform: rotate(90deg);
}
.sun-ray:nth-child(4) {
transform: rotate(135deg);
}
.sun-core {
position: relative;
width: 62px;
height: 62px;
border-radius: 50%;
background: radial-gradient(circle at 35% 35%, #fef9c3 0%, #fde047 55%, #f59e0b 100%);
box-shadow:
0 0 24px rgba(254, 240, 138, 0.85),
inset -4px -4px 10px rgba(217, 119, 6, 0.45);
animation: sunBreath 4s ease-in-out infinite;
}
/* =========================
SHARED CSS CLOUD SHAPE
========================= */
.cloud {
position: relative;
width: 102px;
height: 36px;
border-radius: 999px;
background: linear-gradient(180deg, #ffffff 0%, #dbeafe 100%);
box-shadow:
0 10px 20px rgba(15, 23, 42, 0.25),
inset 0 -4px 8px rgba(148, 163, 184, 0.35);
z-index: 3;
}
.cloud::before,
.cloud::after {
content: "";
position: absolute;
border-radius: 50%;
background: linear-gradient(180deg, #ffffff 0%, #e0f2fe 100%);
}
.cloud::before {
width: 50px;
height: 50px;
top: -24px;
left: 16px;
}
.cloud::after {
width: 36px;
height: 36px;
top: -15px;
right: 16px;
}
/* =========================
2. RAINY ICON
========================= */
.rain-icon {
position: relative;
width: 124px;
height: 132px;
display: flex;
flex-direction: column;
align-items: center;
justify-content: flex-start;
padding-top: 28px;
}
.rain-icon .cloud {
background: linear-gradient(180deg, #e2e8f0 0%, #94a3b8 100%);
animation: cloudFloat 4.2s ease-in-out infinite;
}
.rain-icon .cloud::before,
.rain-icon .cloud::after {
background: linear-gradient(180deg, #f1f5f9 0%, #cbd5e1 100%);
}
.rain-drops {
position: relative;
width: 90px;
height: 64px;
margin-top: -2px;
overflow: hidden;
}
.drop {
position: absolute;
top: -14px;
width: 4px;
height: 15px;
border-radius: 999px;
background: linear-gradient(180deg, rgba(186, 230, 253, 0.25), #7dd3fc 85%, #ffffff);
animation: rainFall 1.15s linear infinite;
opacity: 0;
}
.drop:nth-child(1) {
left: 12px;
animation-delay: 0s;
}
.drop:nth-child(2) {
left: 28px;
animation-delay: 0.42s;
height: 13px;
}
.drop:nth-child(3) {
left: 44px;
animation-delay: 0.18s;
}
.drop:nth-child(4) {
left: 60px;
animation-delay: 0.68s;
height: 12px;
}
.drop:nth-child(5) {
left: 76px;
animation-delay: 0.34s;
}
/* =========================
3. SNOWY ICON
========================= */
.snow-icon {
position: relative;
width: 128px;
height: 136px;
display: flex;
flex-direction: column;
align-items: center;
justify-content: flex-start;
padding-top: 26px;
}
.snow-icon .cloud {
background: linear-gradient(180deg, #ffffff 0%, #e0f2fe 100%);
animation: cloudFloat 5s ease-in-out infinite;
}
.snowflakes {
position: relative;
width: 106px;
height: 70px;
margin-top: 2px;
overflow: hidden;
}
/* Pure CSS 6-pointed geometric snowflake */
.flake {
position: absolute;
top: -14px;
width: 2px;
height: 12px;
border-radius: 2px;
background: #ffffff;
box-shadow: 0 0 6px rgba(255, 255, 255, 0.85);
animation: snowDrift 3.2s linear infinite;
opacity: 0;
}
.flake::before,
.flake::after {
content: "";
position: absolute;
inset: 0;
border-radius: 2px;
background: #ffffff;
}
.flake::before {
transform: rotate(60deg);
}
.flake::after {
transform: rotate(-60deg);
}
.flake:nth-child(1) {
left: 14px;
animation-delay: 0s;
animation-duration: 3.1s;
}
.flake:nth-child(2) {
left: 34px;
animation-delay: 1.1s;
animation-duration: 3.6s;
}
.flake:nth-child(3) {
left: 54px;
animation-delay: 0.45s;
animation-duration: 2.9s;
}
.flake:nth-child(4) {
left: 74px;
animation-delay: 1.75s;
animation-duration: 3.4s;
}
.flake:nth-child(5) {
left: 90px;
animation-delay: 0.85s;
animation-duration: 3.2s;
}
/* Soft snow pellets for depth */
.snow-dot {
position: absolute;
top: -10px;
width: 5px;
height: 5px;
border-radius: 50%;
background: rgba(255, 255, 255, 0.9);
animation: snowDriftDot 2.8s linear infinite;
opacity: 0;
}
.snow-dot:nth-child(6) {
left: 24px;
animation-delay: 0.6s;
}
.snow-dot:nth-child(7) {
left: 64px;
animation-delay: 1.5s;
}
/* =========================
4. STORMY ICON
========================= */
.card-stormy::after {
content: "";
position: absolute;
inset: 0;
background: radial-gradient(
circle at 50% 38%,
rgba(250, 204, 21, 0.28),
rgba(165, 180, 252, 0.14) 45%,
transparent 75%
);
opacity: 0;
pointer-events: none;
z-index: 1;
animation: cardFlash 4.4s ease-in-out infinite;
}
.storm-icon {
position: relative;
width: 128px;
height: 136px;
display: flex;
flex-direction: column;
align-items: center;
justify-content: flex-start;
padding-top: 24px;
}
.storm-icon .cloud {
background: linear-gradient(180deg, #64748b 0%, #334155 100%);
box-shadow:
0 12px 24px rgba(2, 6, 23, 0.55),
inset 0 -4px 8px rgba(15, 23, 42, 0.55);
animation: cloudRumble 4.4s ease-in-out infinite;
}
.storm-icon .cloud::before,
.storm-icon .cloud::after {
background: linear-gradient(180deg, #94a3b8 0%, #475569 100%);
}
.storm-rain {
position: absolute;
top: 62px;
left: 14px;
width: 100px;
height: 60px;
overflow: hidden;
}
.storm-drop {
position: absolute;
top: -12px;
width: 3px;
height: 14px;
border-radius: 999px;
background: rgba(148, 163, 184, 0.55);
animation: stormRain 0.9s linear infinite;
opacity: 0;
}
.storm-drop:nth-child(1) {
left: 14px;
animation-delay: 0.1s;
}
.storm-drop:nth-child(2) {
left: 82px;
animation-delay: 0.45s;
}
.storm-drop:nth-child(3) {
left: 30px;
animation-delay: 0.7s;
}
/* Pure CSS Lightning Bolt (two skewed geometric segments) */
.lightning {
position: relative;
width: 34px;
height: 58px;
margin-top: -4px;
z-index: 4;
filter: drop-shadow(0 0 12px rgba(250, 204, 21, 0.9));
animation: lightningFlash 4.4s ease-in-out infinite;
}
.lightning::before {
content: "";
position: absolute;
top: 0;
left: 10px;
width: 15px;
height: 30px;
background: linear-gradient(180deg, #fef08a 0%, #facc15 100%);
transform: skewX(-24deg);
border-radius: 2px 0 0 2px;
}
.lightning::after {
content: "";
position: absolute;
top: 21px;
left: 11px;
width: 0;
height: 0;
border-left: 10px solid #facc15;
border-right: 12px solid transparent;
border-top: 36px solid #facc15;
transform: skewX(-22deg);
}
/* =========================
KEYFRAMES
========================= */
@keyframes spinSlow {
from {
transform: rotate(0deg);
}
to {
transform: rotate(360deg);
}
}
@keyframes sunPulse {
0%,
100% {
transform: scale(0.95);
opacity: 0.7;
}
50% {
transform: scale(1.12);
opacity: 1;
}
}
@keyframes sunBreath {
0%,
100% {
transform: scale(1);
}
50% {
transform: scale(1.06);
}
}
@keyframes cloudFloat {
0%,
100% {
transform: translateY(0);
}
50% {
transform: translateY(-5px);
}
}
@keyframes rainFall {
0% {
transform: translate(4px, 0) rotate(14deg);
opacity: 0;
}
18% {
opacity: 0.95;
}
82% {
opacity: 0.9;
}
100% {
transform: translate(-12px, 68px) rotate(14deg);
opacity: 0;
}
}
@keyframes snowDrift {
0% {
transform: translate(0, 0) rotate(0deg);
opacity: 0;
}
15% {
opacity: 1;
}
50% {
transform: translate(9px, 34px) rotate(120deg);
}
85% {
opacity: 0.9;
}
100% {
transform: translate(-7px, 70px) rotate(240deg);
opacity: 0;
}
}
@keyframes snowDriftDot {
0% {
transform: translate(0, 0);
opacity: 0;
}
20% {
opacity: 0.85;
}
80% {
opacity: 0.75;
}
100% {
transform: translate(8px, 68px);
opacity: 0;
}
}
@keyframes lightningFlash {
0%,
58%,
65%,
71%,
100% {
opacity: 0.16;
transform: scale(0.96);
}
60% {
opacity: 1;
transform: scale(1.05);
}
62% {
opacity: 0.35;
}
67% {
opacity: 1;
transform: scale(1.08);
}
}
@keyframes cardFlash {
0%,
58%,
65%,
71%,
100% {
opacity: 0;
}
60%,
67% {
opacity: 1;
}
62% {
opacity: 0.25;
}
}
@keyframes cloudRumble {
0%,
57%,
72%,
100% {
transform: translate(0, 0);
}
60% {
transform: translate(-2px, 1px);
}
63% {
transform: translate(2px, -1px);
}
67% {
transform: translate(-1px, 1px);
}
}
@keyframes stormRain {
0% {
transform: translate(6px, 0) rotate(18deg);
opacity: 0;
}
20% {
opacity: 0.8;
}
100% {
transform: translate(-16px, 64px) rotate(18deg);
opacity: 0;
}
}
/* =========================
RESPONSIVE GRID
========================= */
@media (max-width: 1080px) {
.weather-grid {
grid-template-columns: repeat(2, minmax(0, 1fr));
max-width: 720px;
}
.weather-card {
min-height: 390px;
}
}
@media (max-width: 600px) {
body {
padding: 28px 16px;
}
.page-header {
margin-bottom: 24px;
}
.weather-grid {
grid-template-columns: 1fr;
max-width: 400px;
gap: 18px;
}
.weather-card {
min-height: 360px;
}
}
/* =========================
REDUCED MOTION
========================= */
@media (prefers-reduced-motion: reduce) {
*,
*::before,
*::after {
animation-duration: 0.001ms !important;
animation-iteration-count: 1 !important;
transition-duration: 0.001ms !important;
}
.weather-card:hover {
transform: none;
}
.lightning {
opacity: 1;
}
.drop,
.flake,
.snow-dot,
.storm-drop {
opacity: 0.85;
}
.drop:nth-child(1) {
transform: translate(0, 18px) rotate(14deg);
}
.drop:nth-child(2) {
transform: translate(-4px, 34px) rotate(14deg);
}
.drop:nth-child(3) {
transform: translate(-2px, 14px) rotate(14deg);
}
.drop:nth-child(4) {
transform: translate(-6px, 40px) rotate(14deg);
}
.drop:nth-child(5) {
transform: translate(-3px, 24px) rotate(14deg);
}
.flake:nth-child(1) {
transform: translate(0, 16px);
}
.flake:nth-child(2) {
transform: translate(4px, 38px);
}
.flake:nth-child(3) {
transform: translate(-3px, 22px);
}
.flake:nth-child(4) {
transform: translate(2px, 44px);
}
.flake:nth-child(5) {
transform: translate(-2px, 28px);
}
}
</style>
</head>
<body>
<header class="page-header">
<h1>Pure CSS Weather Forecast</h1>
<p>Four atmospheric cards crafted exclusively with semantic HTML elements and CSS animations.</p>
</header>
<main class="weather-grid">
<!-- Sunny Card -->
<article class="weather-card card-sunny">
<div class="card-top">
<div class="location">
<h2 class="city">Lisbon</h2>
<span class="country">Portugal</span>
</div>
<span class="badge">UV High</span>
</div>
<div class="icon-stage" aria-hidden="true">
<div class="sun-icon">
<div class="sun-glow"></div>
<div class="sun-rays">
<div class="sun-ray"></div>
<div class="sun-ray"></div>
<div class="sun-ray"></div>
<div class="sun-ray"></div>
</div>
<div class="sun-core"></div>
</div>
</div>
<div class="card-bottom">
<div class="temp-row">
<span class="temp">28</span>
<span class="unit">°C</span>
</div>
<p class="description">Bright & Sunny</p>
<div class="meta-bar">
<div class="meta-item">
<span>Wind</span>
<strong>11 km/h</strong>
</div>
<div class="meta-item">
<span>Humidity</span>
<strong>38%</strong>
</div>
<div class="meta-item">
<span>Feels like</span>
<strong>30°C</strong>
</div>
</div>
</div>
</article>
<!-- Rainy Card -->
<article class="weather-card card-rainy">
<div class="card-top">
<div class="location">
<h2 class="city">Seattle</h2>
<span class="country">United States</span>
</div>
<span class="badge">85% Rain</span>
</div>
<div class="icon-stage" aria-hidden="true">
<div class="rain-icon">
<div class="cloud"></div>
<div class="rain-drops">
<span class="drop"></span>
<span class="drop"></span>
<span class="drop"></span>
<span class="drop"></span>
<span class="drop"></span>
</div>
</div>
</div>
<div class="card-bottom">
<div class="temp-row">
<span class="temp">13</span>
<span class="unit">°C</span>
</div>
<p class="description">Steady Rain</p>
<div class="meta-bar">
<div class="meta-item">
<span>Wind</span>
<strong>19 km/h</strong>
</div>
<div class="meta-item">
<span>Humidity</span>
<strong>89%</strong>
</div>
<div class="meta-item">
<span>Feels like</span>
<strong>11°C</strong>
</div>
</div>
</div>
</article>
<!-- Snowy Card -->
<article class="weather-card card-snowy">
<div class="card-top">
<div class="location">
<h2 class="city">Reykjavik</h2>
<span class="country">Iceland</span>
</div>
<span class="badge">Frost</span>
</div>
<div class="icon-stage" aria-hidden="true">
<div class="snow-icon">
<div class="cloud"></div>
<div class="snowflakes">
<span class="flake"></span>
<span class="flake"></span>
<span class="flake"></span>
<span class="flake"></span>
<span class="flake"></span>
<span class="snow-dot"></span>
<span class="snow-dot"></span>
</div>
</div>
</div>
<div class="card-bottom">
<div class="temp-row">
<span class="temp">-3</span>
<span class="unit">°C</span>
</div>
<p class="description">Light Snowfall</p>
<div class="meta-bar">
<div class="meta-item">
<span>Wind</span>
<strong>14 km/h</strong>
</div>
<div class="meta-item">
<span>Humidity</span>
<strong>76%</strong>
</div>
<div class="meta-item">
<span>Feels like</span>
<strong>-8°C</strong>
</div>
</div>
</div>
</article>
<!-- Stormy Card -->
<article class="weather-card card-stormy">
<div class="card-top">
<div class="location">
<h2 class="city">Tokyo</h2>
<span class="country">Japan</span>
</div>
<span class="badge">Alert</span>
</div>
<div class="icon-stage" aria-hidden="true">
<div class="storm-icon">
<div class="cloud"></div>
<div class="storm-rain">
<span class="storm-drop"></span>
<span class="storm-drop"></span>
<span class="storm-drop"></span>
</div>
<div class="lightning"></div>
</div>
</div>
<div class="card-bottom">
<div class="temp-row">
<span class="temp">19</span>
<span class="unit">°C</span>
</div>
<p class="description">Thunderstorm</p>
<div class="meta-bar">
<div class="meta-item">
<span>Wind</span>
<strong>42 km/h</strong>
</div>
<div class="meta-item">
<span>Humidity</span>
<strong>94%</strong>
</div>
<div class="meta-item">
<span>Feels like</span>
<strong>17°C</strong>
</div>
</div>
</div>
</article>
</main>
</body>
</html>Reasoning trace (1,601 tokens)
**Crafting Pure CSS Weather Cards** I'm focusing on generating four distinct, animated weather cards using only HTML and CSS. The core challenge is to achieve rich visuals and dynamic effects without any JavaScript, external images, SVG, or icon fonts, adhering strictly to the pure CSS constraint. **Designing Dynamic Weather Icons** I'm working on creating four distinct, animated weather cards using only HTML and CSS. The key is to use pure CSS techniques like pseudo-elements and keyframe animations to render everything, from sun rays and raindrops to snowflakes and lightning bolts, all while avoiding any external resources or JavaScript. **Enhancing Weather Card Details** I'm now refining the content for each card, aiming for a clear temperature display with elegant typography, a concise weather descriptor like "Clear & Radiant," and subtle secondary atmospheric details such as humidity or wind, all while maintaining a clean, scannable aesthetic. The backgrounds are also being set to distinct, fitting gradients. **Generating Fluid CSS Icons** I'm currently deep in the specifics of crafting each CSS icon. For the sunny icon, I'm experimenting with a multi-element approach for the rays, aiming for smooth rotation and a subtle glow. The rainy icon is next, focusing on animated raindrops. **Building Animated Snowflakes** I'm refining the snowy icon, focusing on creating a frosted cloud and then the six individual snowflakes. The biggest challenge is constructing the geometric snowflake shape purely in CSS using only tiny divs and pseudo-elements, then animating their drift and sway.