:root {
    --ink: #1a1a1a;
    --paper: #fff8e8;
    --pop-red: #ff3b30;
    --pop-yellow: #ffd60a;
    --pop-blue: #0a84ff;
    --pop-pink: #ff2d92;
    --shadow: 6px 6px 0 var(--ink);
    --shadow-sm: 3px 3px 0 var(--ink);
  }

  * { box-sizing: border-box; margin: 0; padding: 0; }

  html, body {
    background: var(--paper);
    color: var(--ink);
    font-family: 'Space Mono', monospace;
    min-height: 100vh;
    overflow-x: hidden;
  }

  /* Halftone dot background pattern */
  body::before {
    content: '';
    position: fixed;
    inset: 0;
    background-image: radial-gradient(circle, rgba(0,0,0,0.08) 1px, transparent 1.5px);
    background-size: 12px 12px;
    pointer-events: none;
    z-index: 0;
  }

  /* Burst sticker decoration */
  .burst {
    position: absolute;
    width: 90px; height: 90px;
    background: var(--pop-yellow);
    clip-path: polygon(50% 0%, 60% 35%, 95% 25%, 75% 55%, 100% 75%, 65% 70%, 70% 100%, 50% 75%, 30% 100%, 35% 70%, 0% 75%, 25% 55%, 5% 25%, 40% 35%);
    border: 3px solid var(--ink);
    z-index: 1;
    pointer-events: none;
  }

  main {
    position: relative;
    z-index: 2;
    max-width: 760px;
    margin: 0 auto;
    padding: 24px 20px 60px;
  }

  /* Header */
  header {
    text-align: center;
    margin-bottom: 28px;
    position: relative;
  }

  .logo {
    font-family: 'Bungee Shade', cursive;
    font-size: clamp(48px, 9vw, 84px);
    line-height: 0.95;
    letter-spacing: -0.02em;
    color: var(--pop-red);
    text-shadow: 4px 4px 0 var(--ink);
    transform: rotate(-2deg);
    display: inline-block;
  }

  .tagline {
    font-family: 'Bungee', cursive;
    font-size: 13px;
    letter-spacing: 0.15em;
    margin-top: 12px;
    background: var(--ink);
    color: var(--paper);
    display: inline-block;
    padding: 6px 14px;
    transform: rotate(1deg);
  }

  /* Mode tabs */
  .modes {
    display: flex;
    gap: 10px;
    justify-content: center;
    margin-bottom: 24px;
  }

  .mode-btn {
    font-family: 'Bungee', cursive;
    font-size: 12px;
    letter-spacing: 0.1em;
    padding: 10px 18px;
    background: var(--paper);
    color: var(--ink);
    border: 3px solid var(--ink);
    box-shadow: var(--shadow-sm);
    cursor: pointer;
    transition: transform 0.1s, box-shadow 0.1s;
  }

  .mode-btn:hover { transform: translate(-1px, -1px); box-shadow: 4px 4px 0 var(--ink); }
  .mode-btn:active { transform: translate(2px, 2px); box-shadow: 1px 1px 0 var(--ink); }
  .mode-btn.active { background: var(--pop-blue); color: var(--paper); }

  /* Game card */
  .card {
    background: var(--paper);
    border: 4px solid var(--ink);
    box-shadow: var(--shadow);
    padding: 24px;
    position: relative;
  }

  .card::before {
    content: '';
    position: absolute;
    top: -12px; right: -12px;
    width: 70px; height: 70px;
    background: var(--pop-pink);
    border: 3px solid var(--ink);
    border-radius: 50%;
    z-index: -1;
  }

  /* Round info */
  .round-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
    font-family: 'Bungee', cursive;
    font-size: 12px;
    letter-spacing: 0.1em;
  }

  .round-num { background: var(--pop-yellow); padding: 4px 10px; border: 2px solid var(--ink); }
  .total-score { background: var(--ink); color: var(--paper); padding: 4px 10px; }

  /* Character art area */
  .stage {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-bottom: 20px;
  }

  @media (max-width: 540px) {
    .stage { grid-template-columns: 1fr; }
  }

  .stage-panel {
    border: 3px solid var(--ink);
    aspect-ratio: 1;
    position: relative;
    overflow: hidden;
    background: var(--paper);
  }

  .stage-panel-label {
    position: absolute;
    top: 8px; left: 8px;
    font-family: 'Bungee', cursive;
    font-size: 10px;
    background: var(--ink);
    color: var(--paper);
    padding: 3px 8px;
    z-index: 5;
    letter-spacing: 0.08em;
  }

  .character {
    width: 100%;
    height: 100%;
    display: block;
  }

  .target-color {
    position: absolute;
    inset: 30px;
    border: 3px solid var(--ink);
    box-shadow: inset 0 0 0 3px var(--paper);
  }

  /* Prompt */
  .prompt {
    font-family: 'Bungee', cursive;
    font-size: 14px;
    text-align: center;
    margin-bottom: 18px;
    padding: 10px;
    background: var(--pop-yellow);
    border: 3px solid var(--ink);
    letter-spacing: 0.05em;
  }

  /* Sliders */
  .sliders {
    display: flex;
    flex-direction: column;
    gap: 14px;
    margin-bottom: 20px;
  }

  .slider-row {
    display: grid;
    grid-template-columns: 28px 1fr 50px;
    gap: 12px;
    align-items: center;
  }

  .slider-label {
    font-family: 'Bungee', cursive;
    font-size: 16px;
    text-align: center;
    background: var(--ink);
    color: var(--paper);
    padding: 4px 0;
  }

  .slider-value {
    font-family: 'Space Mono', monospace;
    font-weight: 700;
    font-size: 13px;
    text-align: right;
    background: var(--paper);
    border: 2px solid var(--ink);
    padding: 3px 6px;
  }

  input[type=range] {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 28px;
    background: transparent;
    cursor: pointer;
  }

  input[type=range]::-webkit-slider-runnable-track {
    height: 14px;
    border: 3px solid var(--ink);
    border-radius: 0;
  }

  input[type=range]::-moz-range-track {
    height: 14px;
    border: 3px solid var(--ink);
    border-radius: 0;
  }

  /* Hue track: full rainbow */
  #hue::-webkit-slider-runnable-track {
    background: linear-gradient(to right, #ff0000, #ffff00, #00ff00, #00ffff, #0000ff, #ff00ff, #ff0000);
  }
  #hue::-moz-range-track {
    background: linear-gradient(to right, #ff0000, #ffff00, #00ff00, #00ffff, #0000ff, #ff00ff, #ff0000);
  }

  input[type=range]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 22px;
    height: 28px;
    background: var(--paper);
    border: 3px solid var(--ink);
    cursor: grab;
    margin-top: -10px;
    box-shadow: 2px 2px 0 var(--ink);
  }
  input[type=range]::-moz-range-thumb {
    width: 22px;
    height: 28px;
    background: var(--paper);
    border: 3px solid var(--ink);
    cursor: grab;
    border-radius: 0;
    box-shadow: 2px 2px 0 var(--ink);
  }

  /* Submit button */
  .submit-btn {
    width: 100%;
    font-family: 'Bungee', cursive;
    font-size: 18px;
    letter-spacing: 0.15em;
    padding: 14px;
    background: var(--pop-red);
    color: var(--paper);
    border: 4px solid var(--ink);
    box-shadow: var(--shadow);
    cursor: pointer;
    transition: transform 0.1s, box-shadow 0.1s;
  }
  .submit-btn:hover:not(:disabled) { transform: translate(-2px, -2px); box-shadow: 8px 8px 0 var(--ink); }
  .submit-btn:active:not(:disabled) { transform: translate(3px, 3px); box-shadow: 3px 3px 0 var(--ink); }
  .submit-btn:disabled { opacity: 0.5; cursor: not-allowed; }

  /* Result panel */
  .result {
    display: none;
    margin-top: 20px;
    padding: 16px;
    border: 3px solid var(--ink);
    background: var(--pop-blue);
    color: var(--paper);
  }
  .result.show { display: block; animation: pop 0.4s; }
  @keyframes pop { 0% { transform: scale(0.85); opacity: 0; } 100% { transform: scale(1); opacity: 1; } }

  .result-row { display: flex; justify-content: space-between; margin-bottom: 6px; font-size: 13px; }
  .result-row b { font-family: 'Bungee', cursive; letter-spacing: 0.1em; }
  .swatch-pair { display: flex; gap: 8px; margin: 12px 0; height: 40px; }
  .swatch-pair > div { flex: 1; border: 2px solid var(--ink); position: relative; }
  .swatch-pair > div::after { content: attr(data-label); position: absolute; bottom: -18px; left: 0; font-size: 10px; font-family: 'Bungee', cursive; color: var(--ink); }

  .next-btn {
    width: 100%;
    margin-top: 24px;
    font-family: 'Bungee', cursive;
    font-size: 14px;
    letter-spacing: 0.1em;
    padding: 10px;
    background: var(--pop-yellow);
    color: var(--ink);
    border: 3px solid var(--ink);
    cursor: pointer;
  }
  .next-btn:hover { background: var(--paper); }

  /* End screen */
  .end-screen {
    display: none;
    padding: 24px;
  }
  .end-screen.show {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    align-items: start;
  }

  .end-left { text-align: center; }

  .end-right {
    display: flex;
    align-items: center;
    justify-content: center;
  }

  .end-right .mini-chart { width: 100%; margin: 0; }

  @media (max-width: 540px) {
    .end-screen.show { grid-template-columns: 1fr; }
  }

  .final-score {
    font-family: 'Bungee Shade', cursive;
    font-size: clamp(56px, 14vw, 96px);
    color: var(--pop-red);
    text-shadow: 4px 4px 0 var(--ink);
    line-height: 1;
    margin: 16px 0;
  }
  .final-label { font-family: 'Bungee', cursive; font-size: 12px; letter-spacing: 0.2em; }
  .grade {
    display: inline-block;
    font-family: 'Bungee', cursive;
    font-size: 22px;
    padding: 8px 20px;
    background: var(--pop-yellow);
    border: 3px solid var(--ink);
    margin: 14px 0;
    letter-spacing: 0.15em;
  }

  .end-actions { display: flex; gap: 10px; flex-wrap: wrap; justify-content: center; margin-top: 18px; }
  .end-actions button {
    font-family: 'Bungee', cursive;
    font-size: 12px;
    letter-spacing: 0.1em;
    padding: 12px 18px;
    border: 3px solid var(--ink);
    cursor: pointer;
    box-shadow: var(--shadow-sm);
  }
  .end-actions button:hover { transform: translate(-1px, -1px); box-shadow: 4px 4px 0 var(--ink); }
  .share-btn { background: var(--pop-pink); color: var(--paper); }
  .replay-btn { background: var(--paper); color: var(--ink); }

  /* Round dots */
  .progress-dots { display: flex; gap: 6px; justify-content: center; margin-bottom: 20px; }
  .dot { width: 14px; height: 14px; border: 2px solid var(--ink); background: var(--paper); }
  .dot.done { background: var(--pop-blue); }
  .dot.active { background: var(--pop-yellow); }

  /* Info section */
  .info {
    margin-top: 50px;
    padding: 24px;
    border: 3px solid var(--ink);
    background: var(--paper);
    box-shadow: var(--shadow-sm);
  }
  .info-section-title { font-family: 'Bungee', cursive; font-size: 18px; margin-bottom: 12px; letter-spacing: 0.08em; }
  .info h2 { font-family: 'Bungee', cursive; font-size: 13px; margin: 16px 0 6px; letter-spacing: 0.05em; color: var(--pop-red); }
  .info h3 { font-family: 'Space Mono', monospace; font-size: 13px; font-weight: 700; margin: 14px 0 4px; }
  .info p { font-size: 13px; line-height: 1.6; margin-bottom: 8px; }

  footer {
    text-align: center;
    margin-top: 40px;
    font-size: 11px;
    letter-spacing: 0.1em;
    opacity: 0.7;
  }

  /* Toast */
  .toast {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--ink);
    color: var(--paper);
    padding: 12px 20px;
    font-family: 'Bungee', cursive;
    font-size: 12px;
    letter-spacing: 0.1em;
    border: 3px solid var(--pop-yellow);
    z-index: 100;
    transition: transform 0.3s;
  }
  .toast.show { transform: translateX(-50%) translateY(0); }

  /* Stats bar */
  .stats-bar {
    display: flex;
    gap: 10px;
    padding: 10px 20px;
    margin-bottom: 20px;
    border: 3px solid var(--ink);
    background: var(--paper);
  }

  .stat-block {
    flex: 1;
    display: flex;
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
    padding: 8px 12px;
    border: 2px solid var(--ink);
    font-family: 'Bungee', cursive;
  }

  .stat-block.stat-streak { background: var(--pop-yellow); color: var(--ink); }
  .stat-block.stat-best   { background: var(--pop-blue); color: var(--paper); }
  .stat-block.stat-played { background: var(--pop-pink); color: var(--paper); }

  .stat-block.stat-streak .stat-value { color: var(--pop-red); }

  .stat-value { font-size: 22px; line-height: 1; }
  .stat-label { font-size: 11px; letter-spacing: 0.08em; }

  .stats-bar-empty {
    flex: 1;
    text-align: center;
    font-family: 'Bungee', cursive;
    font-size: 11px;
    letter-spacing: 0.08em;
    padding: 12px;
  }

  /* Result badge */
  .result-badge {
    padding: 12px 16px;
    border: 3px solid var(--ink);
    font-family: 'Bungee', cursive;
    font-size: 14px;
    letter-spacing: 0.05em;
    margin: 14px 0 4px;
    animation: pop 0.4s;
    line-height: 1.4;
  }

  .result-badge.badge-best   { background: var(--pop-yellow); color: var(--ink); }
  .result-badge.badge-streak { background: var(--pop-pink); color: var(--paper); }
  .result-badge.badge-close  { background: var(--pop-blue); color: var(--paper); }

  .badge-sub {
    font-family: 'Space Mono', monospace;
    font-size: 11px;
    font-weight: 400;
    letter-spacing: 0;
    display: block;
    margin-top: 2px;
    opacity: 0.9;
  }

  /* Mini chart */
  .mini-chart {
    margin: 18px 0 6px;
    border: 3px solid var(--ink);
    background: var(--paper);
    padding: 10px 12px 8px;
  }

  .mini-chart svg { width: 100%; height: auto; display: block; }

  .mini-chart-title {
    font-family: 'Bungee', cursive;
    font-size: 10px;
    letter-spacing: 0.08em;
    margin-bottom: 8px;
  }