:root {
    --bg: #0f0f0f;
    --surface: #1a1a1a;
    --surface2: #242424;
    --border: #2e2e2e;
    --text: #f0f0f0;
    --text-dim: #888;
    --text-faint: #444;
    --accent: #ba9f57;
    --accent-dim: #ba9f57;
    --green: #4ade80;
    --red: #f87171;
    --amber: #fbbf24;
    --radius: 16px;
    --radius-sm: 10px;
  }

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

  body {
    background: var(--bg);
    color: var(--text);
    font-family: 'DM Sans', sans-serif;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 24px;
    overflow: hidden;
    position: relative;
  }

  /* subtle grid background */
  body::before {
    content: '';
    position: fixed;
    inset: 0;
    background-image:
      linear-gradient(var(--border) 1px, transparent 1px),
      linear-gradient(90deg, var(--border) 1px, transparent 1px);
    background-size: 48px 48px;
    opacity: 0.3;
    pointer-events: none;
  }

  #clockApp {
    width: 100%;
    max-width: 600px;
  }

  .live-clock {
    font-family: 'DM Mono', monospace;
    font-size: 16px;
    color: var(--text-dim);
    letter-spacing: 0.05em;
    text-align: center;
    margin-bottom: 20px;
  }

  /* Logo placeholder */
  .logo-placeholder {
    width: 60px;
    height: 60px;
    border: none;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    color: var(--text-faint);
    font-size: 10px;
    font-family: 'DM Mono', monospace;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    text-align: center;
    line-height: 1.3;
  }

  .logo-placeholder img {
    object-fit: contain;
  }

  /* Main card */
  .card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 36px 32px 32px;
    position: relative;
    z-index: 1;
  }

  /* Screens */
  .screen { display: none; }
  .screen.active { display: block; }

  /* Prompt */
  .prompt {
    margin-bottom: 16px;
  }
  .prompt-step {
    font-size: 12px;
    color: var(--text-faint);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-family: 'DM Mono', monospace;
    margin-bottom: 5px;
  }
  .prompt-action {
    font-size: 17px;
    font-weight: 500;
    color: var(--text);
    letter-spacing: 0.02em;
  }
  .prompt-name {
    color: var(--accent);
  }

  /* Display */
  .display {
    background: var(--surface2);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 16px 20px;
    margin-bottom: 20px;
    min-height: 56px;
    display: flex;
    align-items: center;
    gap: 12px;
  }
  .display-value {
    font-family: 'DM Mono', monospace;
    font-size: 28px;
    font-weight: 400;
    color: var(--text);
    letter-spacing: 0.08em;
    flex: 1;
  }
  .display-cursor {
    display: inline-block;
    width: 2px;
    height: 28px;
    background: var(--accent);
    margin-left: 2px;
    animation: blink 1s step-end infinite;
    vertical-align: middle;
  }
  @keyframes blink { 0%,100%{opacity:1} 50%{opacity:0} }

  /* Keypad */
  .keypad {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
  }
  .key {
    background: var(--surface2);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text);
    font-family: 'DM Mono', monospace;
    font-size: 22px;
    font-weight: 400;
    padding: 0;
    height: 80px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.1s, transform 0.08s, border-color 0.1s;
    user-select: none;
    position: relative;
    overflow: hidden;
  }
  .key:active, .key.pressed {
    background: var(--surface);
    border-color: var(--accent);
    transform: scale(0.96);
  }
  .key.key-clear {
    color: var(--red);
    font-size: 13px;
    font-family: 'DM Sans', sans-serif;
    font-weight: 500;
    letter-spacing: 0.05em;
    text-transform: uppercase;
  }
  .key.key-enter {
    background: var(--accent);
    border-color: var(--accent);
    color: #0f0f0f;
    font-size: 13px;
    font-family: 'DM Sans', sans-serif;
    font-weight: 600;
    letter-spacing: 0.05em;
    text-transform: uppercase;
  }
  .key.key-enter:active, .key.key-enter.pressed {
    background: var(--accent-dim);
    border-color: var(--accent-dim);
  }
  .key.key-zero {
    grid-column: 2;
  }
  /* ripple */
  .key::after {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle, rgba(232,255,71,0.15) 0%, transparent 70%);
    opacity: 0;
    transition: opacity 0.3s;
    pointer-events: none;
  }
  .key:active::after { opacity: 1; }

  /* Status / result screen */
  .result {
    text-align: center;
    padding: 16px 0;
  }
  .result-icon {
    width: 72px;
    height: 72px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px;
    font-size: 32px;
  }
  .result-icon.success-in       { background: rgba(74,222,128,0.12);  border: 1px solid rgba(74,222,128,0.3); }
  .result-icon.success-out      { background: rgba(251,191,36,0.12);  border: 1px solid rgba(251,191,36,0.3); }
  .result-icon.success-break    { background: rgba(251,191,36,0.12);  border: 1px solid rgba(251,191,36,0.3); }
  .result-icon.success-endbreak { background: rgba(74,222,128,0.12);  border: 1px solid rgba(74,222,128,0.3); }
  .result-icon.error            { background: rgba(248,113,113,0.12); border: 1px solid rgba(248,113,113,0.3); }
  .result-title {
    font-size: 26px;
    font-weight: 600;
    margin-bottom: 8px;
  }
  .result-title.in       { color: var(--green); }
  .result-title.out      { color: var(--amber); }
  .result-title.break    { color: var(--amber); }
  .result-title.endbreak { color: var(--green); }
  .result-title.error    { color: var(--red); }
  .result-sub {
    font-size: 14px;
    color: var(--text-dim);
    font-family: 'DM Mono', monospace;
    margin-bottom: 6px;
  }
  .result-duration {
    font-size: 13px;
    color: var(--text-faint);
    font-family: 'DM Mono', monospace;
  }

  /* Progress bar for auto-reset */
  .reset-bar {
    height: 2px;
    background: var(--border);
    border-radius: 2px;
    margin-top: 28px;
    overflow: hidden;
  }
  .reset-bar-fill {
    height: 100%;
    background: var(--accent);
    border-radius: 2px;
    width: 100%;
    transform-origin: left;
    animation: shrink 3s linear forwards;
  }
  @keyframes shrink { from{width:100%} to{width:0%} }

  /* Loading spinner */
  .spinner {
    width: 32px; height: 32px;
    border: 2px solid var(--border);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.7s linear infinite;
    margin: 0 auto 20px;
  }
  @keyframes spin { to{transform:rotate(360deg)} }

  .loading-text {
    font-family: 'DM Mono', monospace;
    font-size: 13px;
    color: var(--text-dim);
    text-align: center;
  }

  /* Back button */
  .btn-back {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: none;
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-dim);
    font-family: 'DM Mono', monospace;
    font-size: 12px;
    letter-spacing: 0.05em;
    padding: 7px 12px;
    cursor: pointer;
    margin-bottom: 18px;
    transition: border-color 0.15s, color 0.15s;
  }
  .btn-back:hover { border-color: var(--text-dim); color: var(--text); }
  .btn-back:active { transform: scale(0.97); }

  /* Error hint */
  .error-hint {
    font-size: 12px;
    color: var(--red);
    font-family: 'DM Mono', monospace;
    margin-top: 8px;
    min-height: 18px;
    text-align: center;
  }

  /* Logo — pointer so secret tap feels natural */
  .logo-placeholder { cursor: pointer; }

  /* Login screen */
  .login-input {
    width: 100%;
    background: none;
    border: none;
    outline: none;
    color: var(--text);
    font-size: 18px;
    font-family: 'DM Sans', sans-serif;
  }
  .login-input::placeholder {
    color: var(--text-faint);
  }
  .login-btn {
    width: 100%;
    height: 60px;
  }

  /* Logout button (hidden by default, revealed by secret tap) */
  .logout-btn {
    position: fixed;
    top: 10px;
    right: 10px;
    opacity: 0;
    pointer-events: none;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-dim);
    font-family: 'DM Mono', monospace;
    font-size: 12px;
    padding: 8px 14px;
    cursor: pointer;
    transition: opacity 0.2s;
  }

  /* Centred loading wrapper */
  .loading-center {
    padding: 48px 0;
    text-align: center;
  }

  /* Small vertical spacer */
  .spacer-sm {
    height: 12px;
  }

  /* Action buttons — shown after PIN verified */
  .action-buttons {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-top: 8px;
  }

  .action-btn {
    width: 100%;
    height: 72px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    font-family: 'DM Sans', sans-serif;
    font-size: 16px;
    font-weight: 600;
    letter-spacing: 0.03em;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    transition: transform 0.08s, opacity 0.1s;
    user-select: none;
  }
  .action-btn:active { transform: scale(0.97); opacity: 0.85; }

  .action-btn-in {
    background: var(--accent);
    border-color: var(--accent);
    color: #0f0f0f;
  }
  .action-btn-out {
    background: var(--surface2);
    border-color: var(--border);
    color: var(--red);
  }
  .action-btn-break {
    background: var(--surface2);
    border-color: var(--border);
    color: var(--amber);
  }
  .action-btn-endbreak {
    background: var(--surface2);
    border-color: var(--amber);
    color: var(--amber);
  }

  /* Fade transition */
  .card { animation: fadeUp 0.3s ease; }
  @keyframes fadeUp { from{opacity:0;transform:translateY(12px)} to{opacity:1;transform:translateY(0)} }
  .fade-in { animation: fadeIn 0.25s ease; }
  @keyframes fadeIn { from{opacity:0} to{opacity:1} }