:root {
      --bg: #080c10;
      --surface: #0d1520;
      --border: #1a2f45;
      --accent: #00e5ff;
      --accent2: #ff4757;
      --text: #c8d8e8;
      --dim: #4a6070;
      --glow: 0 0 12px rgba(0, 229, 255, 0.5);
    }

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

    body {
      background-color: var(--bg);
      background-image:
        linear-gradient(rgba(0, 229, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 229, 255, 0.03) 1px, transparent 1px);
      background-size: 40px 40px;
      color: var(--text);
      font-family: 'Share Tech Mono', monospace;
      min-height: 100vh;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      padding: 2rem;
    }

    /* Scanline overlay */
    body::before {
      content: '';
      position: fixed;
      inset: 0;
      background: repeating-linear-gradient(
        0deg,
        transparent,
        transparent 2px,
        rgba(0, 0, 0, 0.08) 2px,
        rgba(0, 0, 0, 0.08) 4px
      );
      pointer-events: none;
      z-index: 100;
    }

    h1 {
      font-family: 'Press Start 2P', monospace;
      font-size: clamp(0.9rem, 3vw, 1.4rem);
      color: var(--accent);
      text-shadow: var(--glow), 0 0 30px rgba(0, 229, 255, 0.3);
      letter-spacing: 0.05em;
      margin-bottom: 3rem;
      text-align: center;
      animation: flicker 6s infinite;
    }

    h1::before {
      content: '> ';
      color: var(--accent2);
      text-shadow: 0 0 12px rgba(255, 71, 87, 0.6);
    }

    @keyframes flicker {
      0%, 95%, 100% { opacity: 1; }
      96% { opacity: 0.7; }
      97% { opacity: 1; }
      98% { opacity: 0.85; }
    }

    div {
      background: var(--surface);
      border: 1px solid var(--border);
      border-top: 2px solid var(--accent);
      padding: 2rem 2.5rem;
      width: 100%;
      max-width: 480px;
      position: relative;
      box-shadow: 0 0 40px rgba(0, 229, 255, 0.06), inset 0 0 40px rgba(0, 0, 0, 0.4);
    }

    div::before {
      content: 'GAME SELECT';
      position: absolute;
      top: -0.75rem;
      left: 1.2rem;
      background: var(--surface);
      padding: 0 0.5rem;
      font-family: 'Press Start 2P', monospace;
      font-size: 0.55rem;
      color: var(--accent);
      letter-spacing: 0.1em;
    }

    ul {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 0.75rem;
    }

    li {
      border: 1px solid var(--border);
      transition: border-color 0.2s, background 0.2s;
    }

    li:hover {
      border-color: var(--accent);
      background: rgba(0, 229, 255, 0.05);
    }

    li a {
      display: block;
      padding: 0.85rem 1.2rem;
      color: var(--text);
      text-decoration: none;
      font-size: 0.95rem;
      letter-spacing: 0.05em;
      transition: color 0.2s, text-shadow 0.2s;
      position: relative;
    }

    li a::before {
      content: '▶';
      color: var(--dim);
      margin-right: 0.8rem;
      font-size: 0.7rem;
      transition: color 0.2s, margin-right 0.2s;
    }

    li:hover a {
      color: var(--accent);
      text-shadow: 0 0 8px rgba(0, 229, 255, 0.5);
    }

    li:hover a::before {
      color: var(--accent2);
      margin-right: 1rem;
    }

    /* GitHub link */
    body > a {
      display: inline-flex;
      align-items: center;
      gap: 0.5rem;
      margin-top: 2rem;
      color: var(--dim);
      text-decoration: none;
      font-size: 0.8rem;
      letter-spacing: 0.1em;
      border: 1px solid var(--border);
      padding: 0.5rem 1rem;
      transition: color 0.2s, border-color 0.2s;
    }

    body > a::before {
      content: '⌥';
      font-size: 1rem;
    }

    body > a:hover {
      color: var(--accent);
      border-color: var(--accent);
      text-shadow: 0 0 8px rgba(0, 229, 255, 0.4);
    }

    /* Mobile tap state (hover doesn't work on touch) */
    @media (hover: none) {
      li:active {
        border-color: var(--accent);
        background: rgba(0, 229, 255, 0.08);
      }
      li:active a {
        color: var(--accent);
        text-shadow: 0 0 8px rgba(0, 229, 255, 0.5);
      }
      li:active a::before {
        color: var(--accent2);
        margin-right: 1rem;
      }
      body > a:active {
        color: var(--accent);
        border-color: var(--accent);
      }
    }

    /* Smartphone */
    @media (max-width: 480px) {
      body {
        padding: 1.5rem 1rem;
        justify-content: flex-start;
        padding-top: 3rem;
      }

      h1 {
        font-size: clamp(0.65rem, 4.5vw, 0.95rem);
        margin-bottom: 2rem;
        line-height: 1.8;
      }

      div {
        padding: 1.75rem 1.25rem;
      }

      li a {
        padding: 1rem 1rem;
        font-size: 1rem;
      }

      ul {
        gap: 0.6rem;
      }

      body > a {
        font-size: 0.75rem;
        padding: 0.6rem 1.1rem;
        margin-top: 1.5rem;
      }
    }

    /* Corner decorations */
    div::after {
      content: '';
      position: absolute;
      bottom: -1px;
      right: -1px;
      width: 16px;
      height: 16px;
      border-bottom: 2px solid var(--accent2);
      border-right: 2px solid var(--accent2);
    }