:root {
    --bg: #f4f2ee; --surface: #ffffff; --text: #1a1a1a; --muted: #8a8a8a;
    --border: #e2ddd5; --accent: #1a1a1a; --accent-text: #ffffff;
    --shadow: 0 10px 40px rgba(0,0,0,.10);
  }
  [data-theme="dark"] {
    --bg: #121212; --surface: #1c1c1c; --text: #f0ede8; --muted: #8a8a8a;
    --border: #2c2c2c; --accent: #f0ede8; --accent-text: #121212;
    --shadow: 0 10px 40px rgba(0,0,0,.5);
  }
  * { margin: 0; padding: 0; box-sizing: border-box; }
  body {
    background: var(--bg); color: var(--text);
    font: 15px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    min-height: 100vh; transition: background .3s, color .3s;
  }
  .app { display: flex; min-height: 100vh; }
  .panel {
    width: 320px; flex-shrink: 0; padding: 28px 24px; background: var(--surface);
    border-right: 1px solid var(--border); overflow-y: auto; max-height: 100vh;
    position: sticky; top: 0;
  }
  .brand { font-size: 17px; font-weight: 800; letter-spacing: .3px; display: flex; align-items: center; gap: 10px; }
  .brand-logo { width: 34px; height: 34px; border-radius: 8px; }
  .brand-txt { line-height: 1.15; }
  .brand-txt > span { display: block; font-size: 11.5px; font-weight: 400; color: var(--muted); letter-spacing: .2px; }
  .top-links { display: flex; gap: 8px; margin: 12px 0 14px; }
  .top-links a {
    flex: 1; text-align: center; padding: 7px 4px; border: 1px solid var(--border);
    border-radius: 9px; font-size: 12.5px; font-weight: 600; color: var(--text);
    text-decoration: none; background: var(--bg);
  }
  .top-links a:hover { border-color: var(--muted); }
  .tagline { font-size: 13.5px; font-weight: 700; margin: 2px 0 4px; }
  .desc { color: var(--muted); font-size: 12.5px; line-height: 1.45; margin: 0 0 8px; }
  .stats { color: var(--muted); font-size: 11px; line-height: 1.45; margin: 0 0 18px; font-style: italic; }
  .stats::after { content: ' 🙂'; font-style: normal; }
  .dlcount { margin-top: 16px; text-align: center; font-size: 12px; color: var(--muted); }
  .dlcount b { color: var(--text); font-size: 13px; }
  .privacy {
    margin-top: 22px; padding-top: 14px; border-top: 1px solid var(--border);
    font-size: 11px; color: var(--muted); line-height: 1.5; text-align: center;
  }
  .privacy + .footer { margin-top: 10px; padding-top: 0; border-top: 0; }
  .footer {
    margin-top: 22px; padding-top: 14px; border-top: 1px solid var(--border);
    text-align: center; font-size: 11.5px; color: var(--muted);
  }
  .footer .heart { color: #e25555; }
  .field { margin-bottom: 18px; }
  input[type="range"] { width: 100%; accent-color: var(--accent); cursor: pointer; }
  #density-what { text-transform: none; letter-spacing: .2px; }
  .field > label {
    display: block; font-size: 11px; font-weight: 700; text-transform: uppercase;
    letter-spacing: 1.2px; color: var(--muted); margin-bottom: 7px;
  }
  select, input[type="text"], input[type="number"] {
    width: 100%; padding: 9px 11px; border: 1px solid var(--border); border-radius: 9px;
    background: var(--bg); color: var(--text); font: inherit; font-size: 14px;
  }
  select:focus, input:focus { outline: 2px solid var(--muted); outline-offset: -1px; }
  .row { display: flex; gap: 8px; }
  .row > * { flex: 1; }
  .seg { display: flex; border: 1px solid var(--border); border-radius: 9px; overflow: hidden; }
  .seg button {
    flex: 1; padding: 8px 4px; border: 0; background: var(--bg); color: var(--muted);
    font: inherit; font-size: 13px; cursor: pointer;
  }
  .seg button.on { background: var(--accent); color: var(--accent-text); font-weight: 600; }
  .swatches { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; }
  .sw {
    height: 40px; border-radius: 9px; cursor: pointer; border: 2px solid transparent;
    overflow: hidden; display: flex; padding: 0; background: none;
  }
  .sw i { flex: 1; }
  .sw.on { border-color: var(--text); }
  .sw:focus-visible { outline: 2px solid var(--muted); }
  .custom-colors { display: flex; gap: 8px; align-items: center; margin-top: 10px; flex-wrap: wrap; }
  .custom-colors input[type="color"] {
    width: 38px; height: 38px; border: 1px solid var(--border); border-radius: 9px;
    background: none; padding: 2px; cursor: pointer;
  }
  .mini {
    padding: 8px 10px; border: 1px solid var(--border); border-radius: 9px; background: var(--bg);
    color: var(--text); font: inherit; font-size: 13px; cursor: pointer;
  }
  .mini:hover { border-color: var(--muted); }
  .btn {
    width: 100%; padding: 13px; border: 0; border-radius: 11px; background: var(--accent);
    color: var(--accent-text); font: inherit; font-size: 15px; font-weight: 700;
    cursor: pointer; margin-top: 4px;
  }
  .btn:hover { opacity: .88; }
  .btn.ghost {
    background: transparent; color: var(--text); border: 1px solid var(--border); font-weight: 600;
  }
  .btn-row .btn { padding: 12px 6px; font-size: 13.5px; }
  .stage {
    flex: 1; display: flex; flex-direction: column; align-items: center; justify-content: center;
    padding: 36px; gap: 16px; min-width: 0;
  }
  #preview {
    max-width: 100%; max-height: 78vh; border-radius: 14px; box-shadow: var(--shadow);
    background: var(--surface);
  }
  .meta { color: var(--muted); font-size: 12.5px; text-align: center; }
  .toast {
    position: fixed; bottom: 22px; left: 50%; transform: translateX(-50%);
    background: var(--accent); color: var(--accent-text); padding: 10px 18px;
    border-radius: 10px; font-size: 14px; opacity: 0; pointer-events: none; transition: opacity .3s;
  }
  .toast.show { opacity: 1; }
  .lang { position: absolute; top: 28px; right: 24px; display: flex; gap: 2px; }
  .panel { position: relative; }
  .lang button {
    border: 0; background: none; color: var(--muted); font: inherit; font-size: 12px;
    cursor: pointer; padding: 2px 4px;
  }
  .lang button.on { color: var(--text); font-weight: 700; text-decoration: underline; }
  @media (max-width: 820px) {
    .app { flex-direction: column-reverse; }
    .panel { width: 100%; max-height: none; position: static; border-right: 0; border-top: 1px solid var(--border); }
    .stage { padding: 20px; }
    #preview { max-height: 55vh; }
  }