:root {
            --bg: #0a0a0a;
            --panel: #141414;
            --accent: #f1c40f;
            --blue: #3498db;
            --border: #2a2a2a;
            --danger: #ff4d4d;
            --text: #fff;
            --text-muted: #888;
            --card-bg: #222;
            --overlay-bg: rgba(0, 0, 0, .62);
            --modal-bg: #101010;
        }

        [data-theme="light"] {
            --bg: #f0f4f8;
            --panel: #ffffff;
            --accent: #f1c40f;
            --blue: #3498db;
            --border: #ddd;
            --danger: #ff4d4d;
            --text: #2c3e50;
            --text-muted: #6b7a90;
            --card-bg: #ffffff;
            --overlay-bg: rgba(255, 255, 255, .8);
            --modal-bg: #ffffff;
        }

        body {
            margin: 0;
            background: var(--bg);
            color: var(--text);
            font-family: "Courier New", Courier, monospace;
            display: flex;
            flex-direction: column;
            align-items: center;
            overflow-x: hidden;
            transition: background 0.3s, color 0.3s;
        }

        .topbar {
            width: 100%;
            max-width: 460px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 10px;
            flex-wrap: wrap;
            margin-top: 10px;
            padding: 0 10px;
            box-sizing: border-box;
        }

        .smallbtn {
            text-decoration: none;
            background: var(--blue);
            color: #fff;
            padding: 8px 12px;
            border-radius: 8px;
            font-weight: 700;
            border: none;
            cursor: pointer;
            font-size: 0.9rem;
        }

        .badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 8px 12px;
            border-radius: 10px;
            background: var(--card-bg);
            color: var(--accent);
            font-weight: 800;
            font-size: 0.9rem;
        }

        .header {
            margin-top: 8px;
            text-align: center;
            width: 100%;
            max-width: 460px;
            padding: 0 10px;
            box-sizing: border-box;
        }

        .title {
            margin: 0;
            color: var(--accent);
            letter-spacing: 1px;
        }

        .hud {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-top: 10px;
            gap: 10px;
            flex-wrap: wrap;
        }

        .card {
            background: var(--panel);
            border: 1px solid var(--border);
            border-radius: 12px;
            padding: 10px 12px;
            min-width: 140px;
            box-sizing: border-box;
        }

        .label {
            color: var(--text-muted);
            font-size: 12px;
            font-weight: 700;
            display: block;
            margin-bottom: 4px;
        }

        .value {
            font-size: 22px;
            font-weight: 900;
            color: var(--text);
        }

        .actions {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
            justify-content: flex-end;
            flex: 1;
        }

        .btn {
            background: #333;
            color: #fff;
            border: 1px solid #444;
            padding: 10px 12px;
            border-radius: 10px;
            cursor: pointer;
            font-weight: 800;
        }

        .btn:active {
            transform: translateY(1px);
        }

        .btn.primary {
            background: var(--blue);
            border-color: transparent;
        }

        .btn.danger {
            background: #3a1d1d;
            border-color: #663333;
            color: #ffd6d6;
        }

        #gameWrap {
            width: 100%;
            max-width: 460px;
            padding: 0 10px;
            box-sizing: border-box;
            margin-top: 10px;
        }

        #gameContainer {
            position: relative;
            border: 4px solid #2980b9;
            border-radius: 12px;
            box-shadow: 0 0 20px rgba(41, 128, 185, .45);
            overflow: hidden;
            background: #000;
            touch-action: none;
        }

        canvas {
            display: block;
            width: 100%;
            height: auto;
        }

        .hint {
            margin: 10px 0 0;
            color: var(--text-muted);
            font-size: 0.9rem;
            text-align: center;
        }

        /* Leaderboard */
        #leaderboard {
            width: 100%;
            max-width: 460px;
            background: var(--panel);
            margin-top: 16px;
            padding: 14px;
            border-radius: 12px;
            border: 1px solid var(--border);
            box-sizing: border-box;
        }

        #leaderboard h3 {
            margin: 0 0 10px 0;
            color: var(--blue);
            text-align: center;
            border-bottom: 1px solid var(--border);
            padding-bottom: 10px;
        }

        .score-row {
            display: flex;
            justify-content: space-between;
            padding: 6px 0;
            border-bottom: 1px solid var(--border);
            font-size: 14px;
        }

        .score-row:last-child {
            border-bottom: none;
        }

        .rank {
            color: var(--text-muted);
            margin-right: 10px;
        }

        .muted {
            color: var(--text-muted);
            text-align: center;
            padding: 10px 0;
            font-size: 13px;
        }

        /* Overlay */
        .overlay {
            position: absolute;
            inset: 0;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--overlay-bg);
            opacity: 0;
            pointer-events: none;
            transition: .15s;
        }

        .overlay.show {
            opacity: 1;
            pointer-events: auto;
        }

        .modal {
            width: min(92%, 360px);
            background: var(--modal-bg);
            border: 1px solid var(--border);
            border-radius: 14px;
            padding: 14px;
            box-shadow: 0 8px 30px rgba(0, 0, 0, .6);
            text-align: center;
        }

        .modal h2 {
            margin: 6px 0 10px 0;
            color: var(--accent);
        }

        .modal p {
            margin: 6px 0;
            color: var(--text);
            font-weight: 700;
        }

        .modal .sub {
            color: var(--text-muted);
            font-weight: 600;
            font-size: 13px;
            margin-top: 10px;
            line-height: 1.4;
        }

        .btn.off {
            opacity: 0.55;
        }

        /* 커스텀 팝업 모달 */
        .popup-overlay {
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.6);
            display: flex;
            align-items: center;
            justify-content: center;
            z-index: 2000;
            opacity: 0;
            pointer-events: none;
            transition: opacity 0.25s ease;
        }
        .popup-overlay.show {
            opacity: 1;
            pointer-events: auto;
        }
        .popup-modal {
            background: var(--modal-bg);
            border: 1px solid var(--border);
            border-radius: 18px;
            padding: 30px 25px;
            max-width: 340px;
            width: 90%;
            box-shadow: 0 15px 40px rgba(0, 0, 0, 0.4);
            text-align: center;
            transform: scale(0.9);
            transition: transform 0.25s ease;
        }
        .popup-overlay.show .popup-modal {
            transform: scale(1);
        }
        .popup-icon {
            font-size: 3.5rem;
            margin-bottom: 15px;
        }
        .popup-title {
            font-size: 1.5rem;
            font-weight: 900;
            color: var(--accent);
            margin-bottom: 12px;
        }
        .popup-message {
            font-size: 1rem;
            color: var(--text);
            line-height: 1.6;
            margin-bottom: 8px;
        }
        .popup-score-box {
            background: var(--card-bg);
            border-radius: 12px;
            padding: 15px;
            margin: 15px 0;
            border: 1px solid var(--border);
        }
        .popup-score-row {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 6px 0;
            font-weight: 600;
        }
        .popup-score-row .label {
            color: var(--text-muted);
            font-size: 0.95rem;
        }
        .popup-score-row .value {
            color: var(--text);
            font-size: 1.1rem;
            font-weight: 800;
        }
        .popup-score-row .value.highlight {
            color: var(--accent);
        }
        .popup-score-row .value.new-record {
            color: #27ae60;
        }
        .popup-btn {
            padding: 14px 28px;
            border: none;
            border-radius: 12px;
            background: var(--blue);
            color: white;
            font-weight: 800;
            font-size: 1rem;
            cursor: pointer;
            box-shadow: 0 4px 0 #2980b9;
            transition: 0.1s;
            margin: 5px;
        }
        .popup-btn:active {
            transform: translateY(3px);
            box-shadow: none;
        }
        .popup-btn.secondary {
            background: var(--card-bg);
            color: var(--text);
            box-shadow: 0 4px 0 var(--border);
        }
        .popup-btn.danger {
            background: var(--danger);
            box-shadow: 0 4px 0 #cc3d3d;
        }
        .popup-buttons {
            display: flex;
            gap: 10px;
            justify-content: center;
            margin-top: 15px;
            flex-wrap: wrap;
        }
        .popup-sub {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-top: 12px;
        }