:root {
    color-scheme: light;
    --bg: #f6f3ea;
    --surface: #fffdf7;
    --surface-2: #ede5d6;
    --text: #17211d;
    --muted: #5f6f66;
    --line: rgba(23, 33, 29, 0.13);
    --accent: #2f7d62;
    --accent-2: #c99a3e;
    --shadow: 0 24px 80px rgba(47, 62, 52, 0.16);
  }
  @media (prefers-color-scheme: dark) {
    :root {
      color-scheme: dark;
      --bg: #0b1110;
      --surface: #111c1a;
      --surface-2: #162521;
      --text: #eef7f2;
      --muted: #a6bbb3;
      --line: rgba(238, 247, 242, 0.12);
      --accent: #8ee8c7;
      --accent-2: #d7b56d;
      --shadow: 0 24px 80px rgba(0, 0, 0, 0.35);
    }
  }
  * { box-sizing: border-box; }
  body {
    margin: 0;
    font-family: "Manrope", "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", ui-sans-serif, system-ui, sans-serif;
    background: radial-gradient(circle at top left, color-mix(in srgb, var(--accent) 16%, transparent), transparent 34rem), var(--bg);
    color: var(--text);
    line-height: 1.65;
  }
  a { color: inherit; }
  .site-header {
    position: sticky;
    top: 0;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: .9rem clamp(1rem, 4vw, 4rem);
    backdrop-filter: blur(18px);
    background: color-mix(in srgb, var(--bg) 82%, transparent);
    border-bottom: 1px solid var(--line);
  }
  .brand { display: inline-flex; align-items: center; gap: .7rem; text-decoration: none; font-weight: 850; }
  .brand img { width: 2.1rem; height: 2.1rem; object-fit: contain; }
  nav { display: flex; gap: 1rem; align-items: center; }
  nav a { color: var(--muted); font-size: .94rem; text-decoration: none; }
  nav a:hover { color: var(--text); }
  main {
    width: min(1060px, calc(100% - 2rem));
    margin: 0 auto;
    padding: clamp(2.2rem, 7vw, 5rem) 0 4rem;
    display: grid;
    grid-template-columns: minmax(0, .82fr) minmax(320px, 1.18fr);
    gap: clamp(1.5rem, 5vw, 3rem);
    align-items: start;
  }
  .intro { padding-top: .5rem; }
  .eyebrow { margin: 0 0 .85rem; color: var(--accent); text-transform: uppercase; letter-spacing: .14em; font-size: .78rem; font-weight: 850; }
  h1 { margin: 0; font-family: "Noto Sans TC", "PingFang TC", "Manrope", sans-serif; font-size: clamp(2rem, 5vw, 3.65rem); line-height: 1.16; letter-spacing: 0; }
  .lead { color: var(--muted); font-size: 1.05rem; margin: 1.2rem 0 0; max-width: 40rem; }
  .notes {
    display: grid;
    gap: .8rem;
    margin-top: 2rem;
    padding: 0;
    list-style: none;
  }
  .notes li {
    padding: .9rem 1rem;
    border: 1px solid var(--line);
    border-radius: 1rem;
    background: color-mix(in srgb, var(--surface) 72%, transparent);
    color: var(--muted);
  }
  .notes strong { color: var(--text); display: block; }
  .form-shell {
    border: 1px solid var(--line);
    border-radius: 1.4rem;
    background: linear-gradient(180deg, color-mix(in srgb, var(--surface) 94%, transparent), color-mix(in srgb, var(--surface-2) 48%, transparent));
    box-shadow: var(--shadow);
    padding: clamp(1.1rem, 4vw, 1.75rem);
  }
  form { display: grid; gap: 1rem; }
  .field { display: grid; gap: .42rem; }
  label { font-weight: 800; }
  .hint { color: var(--muted); font-size: .88rem; }
  input, select, textarea {
    width: 100%;
    border: 1px solid var(--line);
    border-radius: .8rem;
    background: color-mix(in srgb, var(--surface) 82%, transparent);
    color: var(--text);
    font: inherit;
    padding: .82rem .9rem;
    outline: none;
  }
  textarea { min-height: 8rem; resize: vertical; }
  input:focus, select:focus, textarea:focus { border-color: color-mix(in srgb, var(--accent) 58%, var(--line)); box-shadow: 0 0 0 4px color-mix(in srgb, var(--accent) 16%, transparent); }
  .two { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
  .checks { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .65rem; }
  .check {
    display: flex;
    align-items: center;
    gap: .5rem;
    border: 1px solid var(--line);
    border-radius: .8rem;
    padding: .72rem .8rem;
    color: var(--muted);
    background: color-mix(in srgb, var(--surface) 62%, transparent);
  }
  .check input { width: 1rem; height: 1rem; margin: 0; }
  .actions { display: flex; gap: .8rem; flex-wrap: wrap; align-items: center; margin-top: .35rem; }
  button, .button {
    border: 1px solid var(--line);
    border-radius: 999px;
    min-height: 3rem;
    padding: .78rem 1.05rem;
    font: inherit;
    font-weight: 850;
    text-decoration: none;
    cursor: pointer;
  }
  button.primary { background: var(--text); color: var(--bg); }
  .button.secondary { background: color-mix(in srgb, var(--surface) 82%, transparent); color: var(--text); }
  .status { color: var(--muted); font-size: .9rem; margin: .35rem 0 0; }
  footer {
    width: min(1060px, calc(100% - 2rem));
    margin: 0 auto;
    padding: 2rem 0 3rem;
    color: var(--muted);
    border-top: 1px solid var(--line);
    font-size: .9rem;
  }
  @media (max-width: 820px) {
    main { grid-template-columns: 1fr; }
    .two, .checks { grid-template-columns: 1fr; }
    nav a[href="/tools/"] { display: none; }
    .actions { flex-direction: column; align-items: stretch; }
    button, .button { width: 100%; text-align: center; }
  }