:root {
      --bg: #0a0a0f;
      --board: #1a1a2e;
      --board-border: #2a2a4e;
      --cell-empty: #0d0d1a;
      --cell-empty-border: #1e1e3a;
      --red: #cc0044;
      --red-win: #ff2266;
      --red-glow: #ff2266;
      --yellow: #cc8800;
      --yellow-win: #ffcc00;
      --yellow-glow: #ffcc00;
      --text: #ccc;
      --text-dim: #555;
      --text-dimmer: #333;
      --btn-border: #333;
      --min-vh: min(100vh, min(100dvh, 100svh));
      --min-vw: min(100vw, min(100dvw, 100svw));
    }

    /* FIXED: was "-" */
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }

    #hover-row {
      max-width: var(--min-vw);
      --border: 1px solid yellow;
    }

    body {
      background: var(--bg);
      min-height: var(--min-vh);
      max-width: var(--min-vw);
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      font-family: "Courier New", monospace;
      /* fixed quotes */
      padding: 24px 16px;
      color: var(--text);
    }

    #title-label {
      font-size: 11px;
      letter-spacing: 0.4em;
      color: var(--text-dim);
      text-transform: uppercase;
      margin-bottom: 4px;
      text-align: center;
    }

    #title {
      font-size: 32px;
      font-weight: 900;
      letter-spacing: 0.05em;
      text-align: center;
      margin-bottom: 24px;
    }

    #player-config {
      display: flex;
      gap: 16px;
      margin-bottom: 20px;
      flex-wrap: wrap;
      justify-content: center;
    }

    #auth-bar {
      min-height: 26px;
      margin: -12px 0 18px;
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 12px;
      color: var(--text-dim);
      font-size: 11px;
      letter-spacing: 0.12em;
      text-transform: uppercase;
      text-align: center;
      flex-wrap: wrap;
    }

    #signin-btn,
    #logout-btn {
      background: transparent;
      border: 1px solid var(--btn-border);
      color: #888;
      padding: 5px 14px;
      font-size: 10px;
      letter-spacing: 0.16em;
      cursor: pointer;
      font-family: inherit;
      text-transform: uppercase;
    }

    #signin-btn:hover,
    #logout-btn:hover {
      border-color: #777;
      color: #bbb;
    }

    .player-select-wrap {
      text-align: center;
    }

    .player-select-label {
      font-size: 10px;
      color: #666;
      letter-spacing: 0.2em;
      margin-bottom: 4px;
    }

    select {
      background: #111;
      border: 1px solid #333;
      color: var(--text);
      padding: 4px 8px;
      font-size: 12px;
      font-family: inherit;
      cursor: pointer;
      outline: none;
    }

    select option {
      background: #111;
    }

    #status-bar {
      height: 28px;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 12px;
      gap: 8px;
      font-size: 13px;
      letter-spacing: 0.1em;
    }

    #board-wrap {
      max-width: var(--min-vw);
      position: relative;
    }

    #hover-row {
      display: flex;
      height: 20px;
      margin-bottom: 4px;
    }

    .hover-cell {
      width: 60px;
      display: flex;
      justify-content: center;
      align-items: center;
    }

    .hover-pip {
      width: 10px;
      height: 10px;
      border-radius: 50%;
      opacity: 0;
      transition: opacity 0.1s;
    }

    #board {
      max-width: var(--min-vw);
      background: var(--board);
      border: 2px solid var(--board-border);
      padding: 8px;
      border-radius: 4px;
      display: inline-block;
      cursor: default;
    }

    .board-row {
      display: flex;
    }

    .board-cell {
      width: 60px;
      height: 60px;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .disc {
      width: 46px;
      height: 46px;
      border-radius: 50%;
      background: var(--cell-empty);
      border: 1px solid var(--cell-empty-border);
      transition:
        background 0.1s,
        box-shadow 0.15s,
        transform 0.15s;
    }

    .disc.red {
      background: var(--red);
      border: none;
      box-shadow: inset 0 -3px 6px rgba(0, 0, 0, 0.4);
    }

    .disc.yellow {
      background: var(--yellow);
      border: none;
      box-shadow: inset 0 -3px 6px rgba(0, 0, 0, 0.4);
    }

    .disc.win-red {
      background: var(--red-win);
      box-shadow: 0 0 16px var(--red-glow);
      border: 2px solid #ff88aa;
    }

    .disc.win-yellow {
      background: var(--yellow-win);
      box-shadow: 0 0 16px var(--yellow-glow);
      border: 2px solid #ffee88;
    }

    .disc.falling {
      animation: fall var(--fall-duration, 0.5s) cubic-bezier(0.33, 0, 0.66, 1.4) forwards;
    }

    @keyframes fall {
      from {
        transform: translateY(var(--fall-from));
      }

      to {
        transform: translateY(0);
      }
    }

    #col-labels {
      display: flex;
      margin-top: 4px;
    }

    .col-label {
      width: 60px;
      text-align: center;
      font-size: 10px;
      color: var(--text-dimmer);
    }

    #controls {
      margin-top: 20px;
      display: flex;
      gap: 12px;
      align-items: center;
    }

    #reset-btn,
    #start-btn {
      background: transparent;
      border: 1px solid var(--btn-border);
      color: #666;
      padding: 6px 20px;
      font-size: 11px;
      letter-spacing: 0.2em;
      cursor: pointer;
      font-family: inherit;
      text-transform: uppercase;
      transition:
        border-color 0.15s,
        color 0.15s;
    }

    #reset-btn:hover,
    #start-btn:hover {
      border-color: #666;
      color: #aaa;
    }

    #thought-panel {
      margin-top: 12px;
      max-width: 440px;
      width: 100%;
      min-height: 0;
      max-height: 120px;
      overflow-y: auto;
      font-size: 10px;
      color: #7a7aaa;
      letter-spacing: 0.05em;
      line-height: 1.5;
      padding: 0 8px;
      text-align: left;
      white-space: pre-wrap;
      word-break: break-word;
      transition: opacity 0.3s;
    }

    #thought-panel:empty {
      display: none;
    }

    #move-count {
      font-size: 10px;
      color: var(--text-dimmer);
      letter-spacing: 0.1em;
    }

    #history-line {
      margin-top: 12px;
      font-size: 9px;
      color: #2a2a4a;
      letter-spacing: 0.1em;
      text-align: center;
      max-width: 420px;
      word-break: break-all;
    }

    @keyframes blink {

      0%,
      100% {
        opacity: 1;
      }

      50% {
        opacity: 0.2;
      }
    }

    .blink {
      animation: blink 1s infinite;
    }

    #nav-links {
      font-size: 10px;
      letter-spacing: 0.2em;
      margin-bottom: 16px;
      text-align: center;
    }

    #nav-links a {
      color: #888;
      text-decoration: none;
      margin: 0 12px;
      transition: color 0.2s;
    }

    #nav-links a:hover {
      color: #aaa;
    }

    .nav-divider {
      color: #444;
    }

    @keyframes suggest-pulse {

      0%,
      100% {
        box-shadow:
          0 0 0 2px var(--suggest-color),
          0 0 8px var(--suggest-color);
        opacity: 0.55;
      }

      50% {
        box-shadow:
          0 0 0 3px var(--suggest-color),
          0 0 20px var(--suggest-color);
        opacity: 0.85;
      }
    }

    .disc.suggested {
      animation: suggest-pulse 0.9s ease-in-out infinite;
      background: var(--suggest-color);
      border: none;
    }

    @media (prefers-color-scheme: light) {
      :root {
        --bg: #f0f0f5;
        --board: #dddde8;
        --board-border: #b0b0c8;
        --cell-empty: #ffffff;
        --cell-empty-border: #c0c0d8;
        --red: #cc0044;
        --red-win: #ff2266;
        --red-glow: #ff2266;
        --yellow: #cc8800;
        --yellow-win: #e6a800;
        --yellow-glow: #e6a800;
        --text: #222;
        --text-dim: #666;
        --text-dimmer: #999;
        --btn-border: #aaa;
      }

      body {
        background: var(--bg);
        color: var(--text);
      }

      select {
        background: #fff;
        border-color: #aaa;
        color: #222;
      }

      select option {
        background: #fff;
      }

      #reset-btn,
      #start-btn {
        color: #555;
      }

      #reset-btn:hover,
      #start-btn:hover {
        border-color: #666;
        color: #222;
      }

      #thought-panel {
        color: #6666aa;
      }

      #history-line {
        color: #999;
      }
    }