:root {
      color-scheme: dark;
      --bg: #090a08;
      --panel: #11120f;
      --ink: #f7f1df;
      --muted: #b7ad97;
      --quiet: #7a715f;
      --line: rgba(247, 241, 223, 0.16);
      --line-strong: rgba(247, 241, 223, 0.3);
      --signal: #a7ff4f;
      --copper: #ff9f5f;
      --red: #ff6a5f;
      --max: 1360px;
      --mono: "IBM Plex Mono", "SFMono-Regular", Consolas, monospace;
      --body: "Aptos", "Segoe UI", "Helvetica Neue", sans-serif;
      --display: Georgia, "Times New Roman", serif;
    }

    * {
      box-sizing: border-box;
    }

    body {
      margin: 0;
      min-width: 320px;
      min-height: 100vh;
      color: var(--ink);
      background: #090a08;
      font-family: var(--body);
      line-height: 1.45;
    }

    main {
      width: min(var(--max), calc(100% - 40px));
      margin: 0 auto;
      padding: 34px 0 58px;
    }

    header {
      padding: 18px 0 24px;
      border-bottom: 1px solid var(--line);
    }

    .eyebrow,
    .step-count,
    .limit,
    .tiny {
      font-family: var(--mono);
      font-size: 12px;
      letter-spacing: 0.08em;
      text-transform: uppercase;
    }

    .eyebrow {
      color: var(--copper);
    }

    h1,
    h2,
    p {
      margin: 0;
    }

    h1 {
      max-width: 1040px;
      margin-top: 12px;
      font-family: var(--display);
      font-size: clamp(2.8rem, 7vw, 5.8rem);
      font-weight: 500;
      line-height: 0.95;
      letter-spacing: 0;
      text-wrap: balance;
    }

    .lead {
      max-width: 920px;
      margin-top: 18px;
      color: var(--muted);
      font-size: clamp(1.02rem, 2vw, 1.3rem);
    }

    .back-link {
      display: inline-flex;
      margin-top: 22px;
      color: var(--ink);
      font-family: var(--mono);
      font-size: 12px;
      font-weight: 800;
      letter-spacing: 0.06em;
      text-transform: uppercase;
      text-decoration: none;
    }

    .step-count {
      margin: 20px 0 14px;
      color: var(--muted);
    }

    form {
      display: block;
    }

    .step {
      display: none;
      min-height: 520px;
      border: 1px solid var(--line);
      background: rgba(17, 18, 15, 0.84);
      padding: clamp(18px, 4vw, 34px);
    }

    .step.active {
      display: block;
    }

    .step h2 {
      max-width: 980px;
      font-family: var(--display);
      font-size: clamp(2rem, 4vw, 3.15rem);
      font-weight: 500;
      line-height: 1;
      letter-spacing: 0;
    }

    .hint {
      max-width: 860px;
      margin-top: 10px;
      color: var(--muted);
    }

    .field {
      margin-top: 20px;
    }

    .field + .field {
      margin-top: 18px;
    }

    .label-row {
      display: flex;
      justify-content: space-between;
      gap: 12px;
      align-items: baseline;
      margin-bottom: 8px;
    }

    label,
    .label {
      display: block;
      color: var(--ink);
      font-weight: 750;
    }

    .limit,
    .tiny {
      color: var(--quiet);
      white-space: nowrap;
    }

    input[type="text"],
    textarea,
    select {
      width: 100%;
      min-height: 46px;
      border: 1px solid var(--line);
      background: #090a08;
      color: var(--ink);
      padding: 11px 12px;
      font: inherit;
      border-radius: 0;
    }

    textarea {
      min-height: 82px;
      resize: vertical;
    }

    .choice-grid {
      display: grid;
      grid-template-columns: repeat(4, minmax(0, 1fr));
      gap: 8px;
      margin-top: 10px;
    }

    .choice {
      min-height: 42px;
      display: flex;
      align-items: center;
      gap: 8px;
      border: 1px solid var(--line);
      background: rgba(247, 241, 223, 0.04);
      padding: 9px 10px;
      color: var(--muted);
      font-size: 0.94rem;
      font-weight: 650;
      cursor: pointer;
      user-select: none;
    }

    .choice input {
      flex: 0 0 auto;
      accent-color: var(--signal);
    }

    .choice:has(input:checked) {
      border-color: rgba(167, 255, 79, 0.68);
      background: rgba(167, 255, 79, 0.1);
      color: var(--ink);
    }

    .more-wrap {
      margin-top: 10px;
    }

    .more-panel {
      display: none;
      margin-top: 10px;
      padding-top: 10px;
      border-top: 1px solid var(--line);
    }

    .more-panel.open {
      display: block;
    }

    .inline-note {
      margin-top: 10px;
      color: var(--quiet);
      font-size: 0.94rem;
    }

    .warning {
      display: none;
      margin-top: 8px;
      color: var(--red);
      font-size: 0.95rem;
    }

    .warning.visible {
      display: block;
    }

    .nav-actions {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 12px;
      margin-top: 16px;
    }

    .left-actions,
    .right-actions {
      display: flex;
      align-items: center;
      gap: 10px;
      flex-wrap: wrap;
    }

    button {
      min-height: 44px;
      border: 1px solid var(--line-strong);
      background: rgba(247, 241, 223, 0.07);
      color: var(--ink);
      padding: 0 14px;
      font-weight: 800;
      cursor: pointer;
    }

    button.primary {
      border-color: rgba(167, 255, 79, 0.72);
      background: var(--signal);
      color: #11150d;
    }

    button.text-button {
      min-height: 34px;
      border-color: transparent;
      background: transparent;
      color: var(--muted);
      padding: 0;
      font-family: var(--mono);
      font-size: 12px;
      letter-spacing: 0.06em;
      text-transform: uppercase;
    }

    button:disabled {
      opacity: 0.42;
      cursor: not-allowed;
    }

    .packet-step {
      min-height: unset;
    }

    pre {
      max-height: 56vh;
      overflow: auto;
      white-space: pre-wrap;
      margin: 20px 0 0;
      border: 1px solid var(--line);
      background: #090a08;
      color: var(--muted);
      padding: 14px;
      font-family: var(--mono);
      font-size: 12px;
      line-height: 1.45;
    }

    @media (max-width: 760px) {
      main {
        width: min(100% - 22px, var(--max));
        padding-top: 20px;
      }

      .step {
        min-height: auto;
      }

      .choice-grid {
        grid-template-columns: 1fr;
      }

      .nav-actions {
        align-items: stretch;
        flex-direction: column;
      }

      .left-actions,
      .right-actions {
        width: 100%;
      }

      button:not(.text-button) {
        flex: 1;
      }
    }