Models 44

MiniMax M3.1 Flash

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

How it went

Total time
27.6 s
Cost
$0.0052
Output tokens
8,644
Spent thinking
0 tokens
Speed
320.4 tok/s
Console errors
0
First token after
601 ms
First visible text after
601 ms
Prompt tokens
678
Code size
27.7 KB
Finish reason
stop
Served by
Nebius
Model id
minimax/minimax-m3.1-flash
Reasoning sent
{"effort":"xhigh"}
Max output
64,000 tokens
Generated
Nov 11, 2026

What it was asked

The prompt
Build an interactive Kanban board in vanilla HTML, CSS and JavaScript (no framework, no library). Requirements: - Three columns: "To do", "In progress", "Done", each showing its card count. - Pre-populate the board with 6 realistic cards spread across the columns so the first screenshot looks alive. - Each card has a title and a priority (low / medium / high) shown as a colored badge. - Add a card through a small modal form (title required), and delete a card with a button on it. - Drag and drop cards between columns with the mouse, with a clear visual drop indicator. - A search field that filters cards live by title. - A light / dark theme toggle. - State lives in memory only (no storage APIs).
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 · 849 lines

<!DOCTYPE html>
<html lang="en" data-theme="light">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Kanban Board</title>
<style>
  :root {
    --bg: #eef1f6;
    --bg-grad: radial-gradient(1200px 600px at 10% -10%, #dfe7f5 0%, transparent 60%),
               radial-gradient(900px 500px at 100% 0%, #e8e3f6 0%, transparent 55%);
    --panel: #ffffff;
    --panel-2: #f7f8fb;
    --text: #1b2230;
    --muted: #6b7488;
    --line: #e2e6ee;
    --accent: #4f6ef7;
    --accent-soft: rgba(79, 110, 247, .12);
    --shadow: 0 1px 2px rgba(19, 25, 40, .06), 0 8px 24px rgba(19, 25, 40, .07);
    --shadow-lg: 0 18px 50px rgba(19, 25, 40, .22);
    --hi: #e5484d;
    --me: #f5a524;
    --lo: #30a46c;
    --hi-bg: rgba(229, 72, 77, .12);
    --me-bg: rgba(245, 165, 36, .15);
    --lo-bg: rgba(48, 164, 108, .14);
    --drop: #4f6ef7;
  }
  html[data-theme="dark"] {
    --bg: #0d1017;
    --bg-grad: radial-gradient(1100px 600px at 0% -10%, #18233a 0%, transparent 60%),
               radial-gradient(900px 500px at 100% 0%, #241d3a 0%, transparent 55%);
    --panel: #151a23;
    --panel-2: #1b2130;
    --text: #e6eaf3;
    --muted: #93a0b8;
    --line: #262d3b;
    --accent: #7b91ff;
    --accent-soft: rgba(123, 145, 255, .16);
    --shadow: 0 1px 2px rgba(0,0,0,.4), 0 10px 28px rgba(0,0,0,.35);
    --shadow-lg: 0 20px 60px rgba(0,0,0,.6);
    --hi: #ff6369;
    --me: #ffb224;
    --lo: #3dd68c;
    --hi-bg: rgba(255, 99, 105, .16);
    --me-bg: rgba(255, 178, 36, .16);
    --lo-bg: rgba(61, 214, 140, .15);
  }

  * { box-sizing: border-box; }
  html, body { height: 100%; }
  body {
    margin: 0;
    font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background: var(--bg);
    background-image: var(--bg-grad);
    color: var(--text);
    -webkit-font-smoothing: antialiased;
    transition: background-color .25s ease, color .25s ease;
  }

  .wrap {
    max-width: 1240px;
    margin: 0 auto;
    padding: 26px 22px 48px;
  }

  /* ---------- Header ---------- */
  header.top {
    display: flex;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 22px;
  }
  .brand { display: flex; align-items: center; gap: 13px; }
  .logo {
    width: 44px; height: 44px; border-radius: 13px;
    background: linear-gradient(135deg, var(--accent), #8f5cf6);
    display: grid; place-items: center;
    box-shadow: 0 8px 22px var(--accent-soft);
    flex: none;
  }
  .logo svg { width: 24px; height: 24px; }
  .brand h1 {
    margin: 0; font-size: 21px; letter-spacing: -.3px; font-weight: 700;
  }
  .brand p { margin: 2px 0 0; font-size: 12.5px; color: var(--muted); }

  .spacer { flex: 1 1 auto; }

  .search {
    position: relative;
    flex: 1 1 240px;
    max-width: 340px;
  }
  .search svg {
    position: absolute; left: 12px; top: 50%; transform: translateY(-50%);
    width: 16px; height: 16px; color: var(--muted); pointer-events: none;
  }
  .search input {
    width: 100%;
    padding: 10px 34px 10px 35px;
    border-radius: 11px;
    border: 1px solid var(--line);
    background: var(--panel);
    color: var(--text);
    font-size: 14px;
    outline: none;
    box-shadow: var(--shadow);
    transition: border-color .18s, box-shadow .18s;
  }
  .search input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-soft);
  }
  .search .clear {
    position: absolute; right: 8px; top: 50%; transform: translateY(-50%);
    border: 0; background: transparent; color: var(--muted); cursor: pointer;
    font-size: 16px; line-height: 1; padding: 4px 6px; border-radius: 7px;
    display: none;
  }
  .search .clear:hover { background: var(--panel-2); color: var(--text); }
  .search.has-value .clear { display: block; }

  .icon-btn {
    display: inline-flex; align-items: center; gap: 8px;
    height: 40px; padding: 0 14px;
    border-radius: 11px;
    border: 1px solid var(--line);
    background: var(--panel);
    color: var(--text);
    font-size: 13.5px; font-weight: 600;
    cursor: pointer;
    box-shadow: var(--shadow);
    transition: transform .12s ease, border-color .18s, background .18s;
  }
  .icon-btn:hover { border-color: var(--accent); color: var(--accent); }
  .icon-btn:active { transform: translateY(1px); }
  .icon-btn svg { width: 16px; height: 16px; }
  .icon-btn.primary {
    background: var(--accent); border-color: var(--accent); color: #fff;
    box-shadow: 0 8px 20px var(--accent-soft);
  }
  .icon-btn.primary:hover { filter: brightness(1.07); color: #fff; }

  /* ---------- Board ---------- */
  .board {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
    align-items: start;
  }
  .col {
    background: var(--panel-2);
    border: 1px solid var(--line);
    border-radius: 16px;
    padding: 12px 12px 14px;
    min-height: 300px;
    transition: background .18s, border-color .18s, box-shadow .18s;
  }
  .col.is-over {
    background: var(--accent-soft);
    border-color: var(--accent);
    box-shadow: inset 0 0 0 1px var(--accent);
  }
  .col-head {
    display: flex; align-items: center; gap: 9px;
    padding: 4px 4px 12px;
  }
  .dot { width: 9px; height: 9px; border-radius: 50%; flex: none; }
  .col[data-col="todo"] .dot { background: #8b95ab; }
  .col[data-col="doing"] .dot { background: var(--me); }
  .col[data-col="done"] .dot { background: var(--lo); }
  .col-title { font-size: 14px; font-weight: 700; letter-spacing: .1px; }
  .count {
    font-size: 11.5px; font-weight: 700;
    background: var(--panel);
    border: 1px solid var(--line);
    color: var(--muted);
    border-radius: 999px;
    padding: 2px 9px;
    min-width: 24px; text-align: center;
  }
  .col.add-col { display: flex; align-items: center; justify-content: center; }

  .cards { display: flex; flex-direction: column; gap: 10px; min-height: 46px; }

  .card {
    position: relative;
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: 12px;
    padding: 11px 12px 11px 14px;
    box-shadow: var(--shadow);
    cursor: grab;
    transition: transform .14s ease, box-shadow .16s ease, opacity .16s;
    user-select: none;
  }
  .card::before {
    content: ""; position: absolute; left: 0; top: 10px; bottom: 10px;
    width: 3px; border-radius: 0 3px 3px 0;
    background: var(--pri, #8b95ab);
  }
  .card:hover { transform: translateY(-2px); box-shadow: var(--shadow-lg); }
  .card.dragging { opacity: .38; cursor: grabbing; }
  .card-title {
    font-size: 13.8px; font-weight: 600; line-height: 1.35;
    margin: 0 0 9px; padding-right: 24px;
    word-break: break-word;
  }
  .card-foot { display: flex; align-items: center; gap: 8px; }
  .badge {
    font-size: 10.5px; font-weight: 700; letter-spacing: .5px; text-transform: uppercase;
    padding: 3px 8px; border-radius: 999px;
  }
  .badge.high { background: var(--hi-bg); color: var(--hi); }
  .badge.medium { background: var(--me-bg); color: var(--me); }
  .badge.low { background: var(--lo-bg); color: var(--lo); }
  .meta { font-size: 11px; color: var(--muted); margin-left: auto; white-space: nowrap; }

  .del {
    position: absolute; top: 7px; right: 7px;
    width: 24px; height: 24px; border-radius: 7px;
    border: 0; background: transparent; color: var(--muted);
    cursor: pointer; display: grid; place-items: center;
    opacity: 0; transition: opacity .15s, background .15s, color .15s;
  }
  .card:hover .del, .del:focus-visible { opacity: 1; }
  .del:hover { background: var(--hi-bg); color: var(--hi); }
  .del svg { width: 14px; height: 14px; }

  .empty {
    border: 1.5px dashed var(--line);
    border-radius: 12px;
    padding: 18px 12px;
    text-align: center;
    color: var(--muted);
    font-size: 12.5px;
  }

  /* Drop indicator */
  .drop-line {
    height: 3px; border-radius: 3px;
    background: var(--drop);
    box-shadow: 0 0 0 4px var(--accent-soft);
    margin: -2px 0;
    animation: pulse .9s ease-in-out infinite;
  }
  @keyframes pulse { 0%,100% { opacity: 1 } 50% { opacity: .45 } }

  /* ---------- Modal ---------- */
  .overlay {
    position: fixed; inset: 0;
    background: rgba(12, 16, 26, .48);
    backdrop-filter: blur(3px);
    display: grid; place-items: center;
    padding: 20px;
    z-index: 50;
    opacity: 0; pointer-events: none;
    transition: opacity .18s ease;
  }
  .overlay.open { opacity: 1; pointer-events: auto; }
  .modal {
    width: 100%; max-width: 420px;
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: 18px;
    box-shadow: var(--shadow-lg);
    padding: 22px;
    transform: translateY(10px) scale(.98);
    transition: transform .2s cubic-bezier(.2,.8,.3,1);
  }
  .overlay.open .modal { transform: none; }
  .modal h2 { margin: 0 0 4px; font-size: 18px; }
  .modal .sub { margin: 0 0 18px; color: var(--muted); font-size: 13px; }
  label { display: block; font-size: 12.5px; font-weight: 700; margin-bottom: 7px; }
  input[type="text"], select {
    width: 100%; padding: 11px 12px;
    border-radius: 10px; border: 1px solid var(--line);
    background: var(--panel-2); color: var(--text);
    font-size: 14px; font-family: inherit; outline: none;
    transition: border-color .16s, box-shadow .16s;
  }
  input[type="text"]:focus, select:focus {
    border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft);
  }
  .field { margin-bottom: 16px; }
  .err { color: var(--hi); font-size: 12px; margin-top: 6px; display: none; }
  .err.show { display: block; }
  .modal-actions { display: flex; gap: 10px; justify-content: flex-end; margin-top: 20px; }
  .btn {
    padding: 10px 18px; border-radius: 10px; border: 1px solid var(--line);
    background: var(--panel-2); color: var(--text);
    font-size: 13.5px; font-weight: 600; cursor: pointer; font-family: inherit;
    transition: filter .15s, border-color .15s;
  }
  .btn:hover { border-color: var(--accent); }
  .btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
  .btn.primary:hover { filter: brightness(1.08); }

  /* Toast */
  .toast {
    position: fixed; left: 50%; bottom: 26px; transform: translate(-50%, 20px);
    background: var(--text); color: var(--bg);
    padding: 10px 18px; border-radius: 999px; font-size: 13px; font-weight: 600;
    box-shadow: var(--shadow-lg); opacity: 0; pointer-events: none;
    transition: opacity .2s, transform .2s; z-index: 60;
  }
  .toast.show { opacity: 1; transform: translate(-50%, 0); }

  .hint {
    margin-top: 20px; text-align: center; color: var(--muted); font-size: 12px;
  }
  .hint kbd {
    background: var(--panel); border: 1px solid var(--line); border-bottom-width: 2px;
    border-radius: 6px; padding: 1px 6px; font-size: 11px; font-family: inherit;
  }

  @media (max-width: 900px) {
    .board { grid-template-columns: 1fr; }
    .col { min-height: 120px; }
  }
  @media (max-width: 560px) {
    .wrap { padding: 18px 14px 40px; }
    header.top { gap: 10px; }
    .search { max-width: none; order: 3; flex-basis: 100%; }
    .brand h1 { font-size: 18px; }
    .hide-sm { display: none; }
  }
</style>
</head>
<body>
<div class="wrap">
  <header class="top">
    <div class="brand">
      <div class="logo">
        <svg viewBox="0 0 24 24" fill="none" stroke="#fff" stroke-width="2.2" stroke-linecap="round" stroke-linejoin="round">
          <rect x="3" y="3" width="5.5" height="13" rx="1.6"/>
          <rect x="9.5" y="3" width="5" height="18" rx="1.6" opacity=".8"/>
          <rect x="16" y="3" width="5" height="9" rx="1.6" opacity=".6"/>
        </svg>
      </div>
      <div>
        <h1>Product Sprint Board</h1>
        <p>Q3 launch &middot; updated just now</p>
      </div>
    </div>

    <div class="spacer"></div>

    <div class="search" id="searchWrap">
      <svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2.2" stroke-linecap="round">
        <circle cx="11" cy="11" r="7"/><path d="M20 20l-3.2-3.2"/>
      </svg>
      <input id="search" type="text" placeholder="Search cards by title…" aria-label="Search cards">
      <button class="clear" id="searchClear" title="Clear" aria-label="Clear search">✕</button>
    </div>

    <button class="icon-btn" id="themeBtn" title="Toggle light / dark theme" aria-label="Toggle theme">
      <svg id="themeIcon" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round">
        <circle cx="12" cy="12" r="4.2"/>
        <path d="M12 2v2.5M12 19.5V22M2 12h2.5M19.5 12H22M4.9 4.9l1.8 1.8M17.3 17.3l1.8 1.8M19.1 4.9l-1.8 1.8M6.7 17.3l-1.8 1.8"/>
      </svg>
      <span class="hide-sm" id="themeLabel">Dark</span>
    </button>

    <button class="icon-btn primary" id="addBtn">
      <svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2.4" stroke-linecap="round">
        <path d="M12 5v14M5 12h14"/>
      </svg>
      <span class="hide-sm">Add card</span>
    </button>
  </header>

  <main class="board" id="board">
    <section class="col" data-col="todo">
      <div class="col-head">
        <span class="dot"></span>
        <span class="col-title">To do</span>
        <span class="count" data-count="todo">0</span>
      </div>
      <div class="cards" data-list="todo"></div>
    </section>

    <section class="col" data-col="doing">
      <div class="col-head">
        <span class="dot"></span>
        <span class="col-title">In progress</span>
        <span class="count" data-count="doing">0</span>
      </div>
      <div class="cards" data-list="doing"></div>
    </section>

    <section class="col" data-col="done">
      <div class="col-head">
        <span class="dot"></span>
        <span class="col-title">Done</span>
        <span class="count" data-count="done">0</span>
      </div>
      <div class="cards" data-list="done"></div>
    </section>
  </main>

  <p class="hint">Drag cards between columns &middot; press <kbd>N</kbd> to add a card &middot; press <kbd>/</kbd> to search</p>
</div>

<div class="overlay" id="overlay">
  <div class="modal" role="dialog" aria-modal="true" aria-labelledby="modalTitle">
    <h2 id="modalTitle">New card</h2>
    <p class="sub">Add a task to the board.</p>
    <form id="cardForm" novalidate>
      <div class="field">
        <label for="titleInput">Title <span style="color:var(--hi)">*</span></label>
        <input type="text" id="titleInput" placeholder="e.g. Design onboarding flow" autocomplete="off">
        <div class="err" id="titleErr">Please enter a title for the card.</div>
      </div>
      <div class="field">
        <label for="priInput">Priority</label>
        <select id="priInput">
          <option value="high">High</option>
          <option value="medium" selected>Medium</option>
          <option value="low">Low</option>
        </select>
      </div>
      <div class="field">
        <label for="colInput">Column</label>
        <select id="colInput">
          <option value="todo">To do</option>
          <option value="doing">In progress</option>
          <option value="done">Done</option>
        </select>
      </div>
      <div class="modal-actions">
        <button type="button" class="btn" id="cancelBtn">Cancel</button>
        <button type="submit" class="btn primary" id="submitBtn">Add card</button>
      </div>
    </form>
  </div>
</div>

<div class="toast" id="toast"></div>

<script>
(function () {
  "use strict";

  var COLS = ["todo", "doing", "done"];
  var PRI_COLORS = { high: "var(--hi)", medium: "var(--me)", low: "var(--lo)" };

  var state = {
    cards: [
      { id: 1, title: "Design onboarding flow for new teams", priority: "high",   col: "todo",  tag: "Design" },
      { id: 2, title: "Write API docs for the public endpoints", priority: "medium", col: "todo",  tag: "Docs" },
      { id: 3, title: "Fix flaky checkout e2e test on CI",        priority: "high",   col: "doing", tag: "Bug" },
      { id: 4, title: "Migrate settings page to the new design system", priority: "medium", col: "doing", tag: "Frontend" },
      { id: 5, title: "Set up release pipeline for staging",      priority: "low",    col: "done",  tag: "DevOps" },
      { id: 6, title: "Interview 5 beta users about the dashboard", priority: "medium", col: "done",  tag: "Research" }
    ],
    query: "",
    nextId: 7
  };

  var board = document.getElementById("board");
  var overlay = document.getElementById("overlay");
  var form = document.getElementById("cardForm");
  var titleInput = document.getElementById("titleInput");
  var priInput = document.getElementById("priInput");
  var colInput = document.getElementById("colInput");
  var titleErr = document.getElementById("titleErr");
  var searchInput = document.getElementById("search");
  var searchWrap = document.getElementById("searchWrap");
  var searchClear = document.getElementById("searchClear");
  var themeBtn = document.getElementById("themeBtn");
  var themeLabel = document.getElementById("themeLabel");
  var toastEl = document.getElementById("toast");

  /* ---------------- Rendering ---------------- */

  function matches(card) {
    var q = state.query.trim().toLowerCase();
    if (!q) return true;
    return card.title.toLowerCase().indexOf(q) !== -1;
  }

  function cardEl(card) {
    var el = document.createElement("article");
    el.className = "card";
    el.setAttribute("draggable", "true");
    el.dataset.id = card.id;
    el.style.setProperty("--pri", PRI_COLORS[card.priority] || "var(--lo)");

    var title = document.createElement("h3");
    title.className = "card-title";
    title.textContent = card.title;
    el.appendChild(title);

    var foot = document.createElement("div");
    foot.className = "card-foot";

    var badge = document.createElement("span");
    badge.className = "badge " + card.priority;
    badge.textContent = card.priority;
    foot.appendChild(badge);

    if (card.tag) {
      var tag = document.createElement("span");
      tag.className = "meta";
      tag.style.marginLeft = "0";
      tag.textContent = card.tag;
      foot.appendChild(tag);
    }

    el.appendChild(foot);

    var del = document.createElement("button");
    del.className = "del";
    del.type = "button";
    del.title = "Delete card";
    del.setAttribute("aria-label", "Delete card: " + card.title);
    del.innerHTML = '<svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2.2" stroke-linecap="round"><path d="M4 7h16M9.5 7V5h5v2M6.5 7l1 13h9l1-13"/></svg>';
    del.addEventListener("click", function (e) {
      e.stopPropagation();
      deleteCard(card.id);
    });
    el.appendChild(del);

    return el;
  }

  function render() {
    COLS.forEach(function (col) {
      var list = board.querySelector('[data-list="' + col + '"]');
      var visible = state.cards.filter(function (c) { return c.col === col && matches(c); });
      var total = state.cards.filter(function (c) { return c.col === col; }).length;

      // remove old nodes
      while (list.firstChild) list.removeChild(list.firstChild);

      if (!visible.length) {
        var empty = document.createElement("div");
        empty.className = "empty";
        empty.textContent = state.query.trim()
          ? "No matching cards"
          : (total ? "No cards here" : "Drop a card here");
        list.appendChild(empty);
      } else {
        visible.forEach(function (c) { list.appendChild(cardEl(c)); });
      }

      var countEl = board.querySelector('[data-count="' + col + '"]');
      countEl.textContent = total;
      countEl.title = total + " card" + (total === 1 ? "" : "s");
    });
  }

  function toast(msg) {
    toastEl.textContent = msg;
    toastEl.classList.add("show");
    clearTimeout(toast._t);
    toast._t = setTimeout(function () { toastEl.classList.remove("show"); }, 1800);
  }

  /* ---------------- Card actions ---------------- */

  function addCard(title, priority, col) {
    state.cards.push({
      id: state.nextId++,
      title: title,
      priority: priority,
      col: col,
      tag: ""
    });
    render();
  }

  function deleteCard(id) {
    var card = state.cards.find(function (c) { return c.id === id; });
    if (!card) return;
    state.cards = state.cards.filter(function (c) { return c.id !== id; });
    render();
    toast("Deleted \"" + card.title + "\"");
  }

  /* ---------------- Drag & drop ---------------- */

  var dragId = null;
  var dragEl = null;
  var indicator = null;
  var lastCol = null;

  function makeIndicator() {
    var ind = document.createElement("div");
    ind.className = "drop-line";
    return ind;
  }

  function clearIndicator() {
    if (indicator && indicator.parentNode) indicator.parentNode.removeChild(indicator);
    indicator = null;
    lastCol = null;
  }

  function listFor(el) {
    var node = el;
    while (node && node !== board) {
      if (node.classList && node.classList.contains("cards")) return node;
      node = node.parentNode;
    }
    return null;
  }

  function colFor(node) {
    var n = node;
    while (n && n !== board) {
      if (n.classList && n.classList.contains("col")) return n;
      n = n.parentNode;
    }
    return null;
  }

  board.addEventListener("dragstart", function (e) {
    var card = e.target.closest(".card");
    if (!card) return;
    dragId = Number(card.dataset.id);
    dragEl = card;
    card.classList.add("dragging");
    if (e.dataTransfer) {
      e.dataTransfer.effectAllowed = "move";
      try { e.dataTransfer.setData("text/plain", String(dragId)); } catch (err) {}
    }
  });

  board.addEventListener("dragend", function () {
    if (dragEl) dragEl.classList.remove("dragging");
    clearIndicator();
    COLS.forEach(function (c) {
      var col = board.querySelector('[data-col="' + c + '"]');
      if (col) col.classList.remove("is-over");
    });
    dragId = null; dragEl = null;
  });

  board.addEventListener("dragover", function (e) {
    if (dragId === null) return;
    e.preventDefault();
    if (e.dataTransfer) e.dataTransfer.dropEffect = "move";

    var list = listFor(e.target);
    if (!list) return;
    var col = colFor(list);
    if (!col) return;

    COLS.forEach(function (c) {
      var cc = board.querySelector('[data-col="' + c + '"]');
      if (cc) cc.classList.toggle("is-over", cc === col);
    });

    // remove empty placeholder while dragging
    var empty = list.querySelector(".empty");
    if (empty) empty.remove();

    var after = null;
    var cards = Array.prototype.filter.call(list.querySelectorAll(".card:not(.dragging)"), function (c) {
      return c !== dragEl;
    });
    for (var i = 0; i < cards.length; i++) {
      var box = cards[i].getBoundingClientRect();
      var offset = e.clientY - box.top - box.height / 2;
      if (offset < 0) { after = cards[i]; break; }
    }

    if (!indicator) indicator = makeIndicator();
    if (after) {
      if (indicator.nextSibling !== after || indicator.parentNode !== list) {
        list.insertBefore(indicator, after);
      }
    } else {
      if (indicator.parentNode !== list || indicator.nextSibling) {
        list.appendChild(indicator);
      }
    }
    lastCol = list.dataset.list;
  });

  board.addEventListener("dragleave", function (e) {
    var list = listFor(e.target);
    if (!list) return;
    var rect = list.getBoundingClientRect();
    if (e.clientY < rect.top || e.clientY > rect.bottom) {
      // leaving the list vertically
    }
  });

  board.addEventListener("drop", function (e) {
    if (dragId === null) return;
    e.preventDefault();
    var list = listFor(e.target);
    if (!list) return;

    var targetCol = list.dataset.list;
    var card = state.cards.find(function (c) { return c.id === dragId; });
    if (!card) return;

    // determine index based on indicator position
    var index = 0;
    var kids = Array.prototype.slice.call(list.children);
    var before = null;
    if (indicator && indicator.parentNode === list) {
      var idx = kids.indexOf(indicator);
      before = idx;
    } else {
      before = kids.filter(function (k) { return k.classList && k.classList.contains("card") && k !== dragEl; }).length;
    }

    var sameCol = card.col === targetCol;
    var colCards = state.cards.filter(function (c) { return c.col === targetCol && c.id !== card.id; });
    colCards.splice(Math.min(before, colCards.length), 0, card);

    // rebuild order globally for the affected columns
    var order = [];
    COLS.forEach(function (c) {
      state.cards.forEach(function (card2) {
        if (card2.col === c && card2.id !== card.id) order.push(card2);
      });
    });
    // simpler: assign positions per column list
    var newOrder = [];
    COLS.forEach(function (c) {
      if (c === targetCol) {
        colCards.forEach(function (card2) { newOrder.push(card2); });
      } else {
        state.cards.forEach(function (card2) {
          if (card2.col === c) newOrder.push(card2);
        });
      }
    });
    state.cards = newOrder;
    card.col = targetCol;

    clearIndicator();
    COLS.forEach(function (c) {
      var cc = board.querySelector('[data-col="' + c + '"]');
      if (cc) cc.classList.remove("is-over");
    });
    dragId = null;
    if (dragEl) dragEl.classList.remove("dragging");
    dragEl = null;

    render();
    if (!sameCol) toast("Moved to " + colName(targetCol));
  });

  function colName(c) {
    return c === "todo" ? "To do" : c === "doing" ? "In progress" : "Done";
  }

  /* ---------------- Search ---------------- */

  searchInput.addEventListener("input", function () {
    state.query = searchInput.value;
    searchWrap.classList.toggle("has-value", searchInput.value.length > 0);
    render();
  });

  searchClear.addEventListener("click", function () {
    searchInput.value = "";
    state.query = "";
    searchWrap.classList.remove("has-value");
    render();
    searchInput.focus();
  });

  /* ---------------- Modal ---------------- */

  function openModal() {
    overlay.classList.add("open");
    titleInput.value = "";
    priInput.value = "medium";
    colInput.value = "todo";
    titleErr.classList.remove("show");
    setTimeout(function () { titleInput.focus(); }, 60);
  }
  function closeModal() {
    overlay.classList.remove("open");
  }

  document.getElementById("addBtn").addEventListener("click", openModal);
  document.getElementById("cancelBtn").addEventListener("click", closeModal);
  overlay.addEventListener("mousedown", function (e) {
    if (e.target === overlay) closeModal();
  });

  form.addEventListener("submit", function (e) {
    e.preventDefault();
    var v = titleInput.value.trim();
    if (!v) {
      titleErr.classList.add("show");
      titleInput.focus();
      return;
    }
    addCard(v, priInput.value, colInput.value);
    closeModal();
    toast("Added \"" + v + "\"");
  });

  titleInput.addEventListener("input", function () {
    if (titleInput.value.trim()) titleErr.classList.remove("show");
  });

  /* ---------------- Theme ---------------- */

  function setTheme(t) {
    document.documentElement.setAttribute("data-theme", t);
    var dark = t === "dark";
    themeLabel.textContent = dark ? "Light" : "Dark";
    var icon = document.getElementById("themeIcon");
    if (dark) {
      icon.innerHTML = '<path d="M20.5 14.5A8.5 8.5 0 1 1 9.5 3.5a7 7 0 0 0 11 11z"/>';
    } else {
      icon.innerHTML = '<circle cx="12" cy="12" r="4.2"/><path d="M12 2v2.5M12 19.5V22M2 12h2.5M19.5 12H22M4.9 4.9l1.8 1.8M17.3 17.3l1.8 1.8M19.1 4.9l-1.8 1.8M6.7 17.3l-1.8 1.8"/>';
    }
  }
  themeBtn.addEventListener("click", function () {
    var next = document.documentElement.getAttribute("data-theme") === "dark" ? "light" : "dark";
    setTheme(next);
  });

  /* ---------------- Keyboard ---------------- */

  document.addEventListener("keydown", function (e) {
    if (e.key === "Escape") {
      closeModal();
      return;
    }
    var tag = (e.target.tagName || "").toLowerCase();
    var typing = tag === "input" || tag === "textarea" || tag === "select";
    if (typing) return;
    if (e.key === "/" ) { e.preventDefault(); searchInput.focus(); }
    if (e.key === "n" || e.key === "N") { e.preventDefault(); openModal(); }
  });

  /* ---------------- Init ---------------- */
  render();
  setTheme("light");
})();
</script>
</body>
</html>