/* ClearanceAlert — Base Styles: variables, reset, lock screen, setup */

/* ── DESIGN SYSTEM ─────────────────────────────────── */
  :root {
    --black:    #0a0a0a;
    --dark:     #111111;
    --panel:    #1a1a1a;
    --border:   #2a2a2a;
    --muted:    #444444;
    --dim:      #888888;
    --text:     #e8e4d9;
    --amber:    #f59e0b;
    --amber-d:  #b45309;
    --amber-l:  #fcd34d;
    --red:      #ef4444;
    --red-d:    #991b1b;
    --green:    #22c55e;
    --blue:     #3b82f6;
    --font-display: 'Barlow Condensed', sans-serif;
    --font-mono: 'Share Tech Mono', monospace;
  }

  * { margin: 0; padding: 0; box-sizing: border-box; -webkit-tap-highlight-color: transparent; }

  html, body {
    width: 100%; height: 100%;
    background: var(--black);
    color: var(--text);
    font-family: var(--font-display);
    overflow: hidden;
    user-select: none;
  }

  /* ── SCREENS ────────────────────────────────────────── */
  .screen { 
    position: absolute; inset: 0;
    display: flex; flex-direction: column;
    opacity: 0; pointer-events: none;
    transition: opacity 0.3s ease;
  }
  .screen.active { opacity: 1; pointer-events: all; }

  /* ── SETUP SCREEN ────────────────────────────────────── */
  #screen-setup {
    background: var(--black);
    justify-content: center;
    align-items: center;
    padding: 24px;
    gap: 0;
  }

  .setup-header {
    text-align: center;
    margin-bottom: 40px;
  }

  .logo-icon {
    font-size: 64px;
    display: block;
    margin-bottom: 12px;
    filter: drop-shadow(0 0 24px rgba(245, 158, 11, 0.4));
    animation: pulse-glow 2s ease-in-out infinite;
  }

  @keyframes pulse-glow {
    0%, 100% { filter: drop-shadow(0 0 24px rgba(245, 158, 11, 0.4)); }
    50%       { filter: drop-shadow(0 0 40px rgba(245, 158, 11, 0.7)); }
  }

  .app-name {
    font-size: 42px;
    font-weight: 900;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--amber);
    line-height: 1;
  }

  .app-tagline {
    font-size: 14px;
    font-weight: 400;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--dim);
    margin-top: 6px;
  }

  .setup-card {
    width: 100%;
    max-width: 400px;
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 28px;
  }

  .setup-label {
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--dim);
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 8px;
  }

  .setup-label::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--border);
  }

  /* Height picker */
  .height-picker {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 24px;
  }

  .height-btn {
    width: 56px; height: 56px;
    background: var(--dark);
    border: 1px solid var(--border);
    border-radius: 4px;
    color: var(--amber);
    font-family: var(--font-display);
    font-size: 28px;
    font-weight: 700;
    cursor: pointer;
    display: flex; align-items: center; justify-content: center;
    transition: background 0.15s, border-color 0.15s;
    flex-shrink: 0;
  }

  .height-btn:active { background: var(--border); }

  .height-display {
    flex: 1;
    text-align: center;
    background: var(--dark);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 12px 8px;
  }

  .height-ft {
    font-family: var(--font-mono);
    font-size: 38px;
    color: var(--amber);
    line-height: 1;
  }

  .height-unit {
    font-size: 12px;
    color: var(--dim);
    letter-spacing: 0.12em;
    text-transform: uppercase;
    margin-top: 2px;
  }

  /* Inch selector */
  .inch-picker {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 6px;
    margin-bottom: 28px;
  }

  .inch-btn {
    padding: 10px 4px;
    background: var(--dark);
    border: 1px solid var(--border);
    border-radius: 3px;
    color: var(--dim);
    font-family: var(--font-display);
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    text-align: center;
    transition: all 0.15s;
  }

  .inch-btn.active {
    background: var(--amber-d);
    border-color: var(--amber);
    color: var(--amber-l);
  }

  /* Alert distance */
  .alert-distance {
    margin-bottom: 28px;
  }

  .distance-options {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 6px;
  }

  .dist-btn {
    padding: 10px 4px;
    background: var(--dark);
    border: 1px solid var(--border);
    border-radius: 3px;
    color: var(--dim);
    font-family: var(--font-display);
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    text-align: center;
    transition: all 0.15s;
    line-height: 1.2;
  }

  .dist-btn.active {
    background: var(--amber-d);
    border-color: var(--amber);
    color: var(--amber-l);
  }

  .start-btn {
    width: 100%;
    padding: 18px;
    background: var(--amber);
    border: none;
    border-radius: 4px;
    color: var(--black);
    font-family: var(--font-display);
    font-size: 20px;
    font-weight: 900;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    cursor: pointer;
    transition: background 0.15s, transform 0.1s;
    position: relative;
    overflow: hidden;
  }

  .start-btn:active { transform: scale(0.98); background: var(--amber-l); }

  .start-btn::after {
    content: '';
    position: absolute; inset: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.15) 0%, transparent 50%);
  }

  .disclaimer {
    margin-top: 20px;
    font-size: 11px;
    color: var(--muted);
    text-align: center;
    line-height: 1.5;
    letter-spacing: 0.03em;
  }