:root {
            --primary: #1a1a1a;
            --primary-dark: #0d0d0d;
            --secondary: #2d2d2d;
            --accent: #ff6b35;
            --accent-dark: #e55a2b;
            --success: #22c55e;
            --success-dark: #16a34a;
            --warning: #f59e0b;
            --warning-dark: #d97706;
            --danger: #ef4444;
            --danger-dark: #dc2626;
            --dark: #0f0f0f;
            --light: #1f1f1f;
            --white: #ffffff;
            --text-primary: #ffffff;
            --text-secondary: #b3b3b3;
            --text-muted: #666666;
            --bg-primary: #0a0a0a;
            --bg-secondary: #141414;
            --bg-card: #1e1e1e;
            --border: #333333;
            --shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
            --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.6);
            --border-radius: 12px;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        body {
            font-family: 'Inter', sans-serif;
            background: linear-gradient(135deg, var(--dark) 0%, var(--primary) 100%);
            min-height: 100vh;
            padding: 20px;
            color: var(--text-primary);
        }

        .container {
            max-width: 480px;
            margin: 0 auto;
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--border-radius);
            box-shadow: var(--shadow-lg);
            overflow: hidden;
        }

        /* Navigation */
        .nav-tabs {
            display: flex;
            background: var(--bg-secondary);
            border-bottom: 1px solid var(--border);
        }

        .nav-tab {
            flex: 1;
            padding: 16px 12px;
            background: none;
            border: none;
            color: var(--text-secondary);
            font-size: 0.9rem;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            border-bottom: 2px solid transparent;
        }

        .nav-tab.active {
            color: var(--accent);
            border-bottom-color: var(--accent);
            background: var(--bg-card);
        }

        .nav-tab:hover {
            color: var(--text-primary);
        }

        /* Tab Content */
        .tab-content {
            display: none;
        }

        .tab-content.active {
            display: block;
        }

        /* Header */
        .header {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            color: var(--text-primary);
            padding: 24px 20px;
            text-align: center;
            position: relative;
            border-bottom: 1px solid var(--border);
        }

        .header::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="20" cy="20" r="2" fill="rgba(255,255,255,0.05)"/><circle cx="80" cy="40" r="1.5" fill="rgba(255,255,255,0.05)"/><circle cx="40" cy="80" r="1" fill="rgba(255,255,255,0.05)"/><circle cx="70" cy="70" r="1.5" fill="rgba(255,255,255,0.05)"/></svg>');
            opacity: 0.3;
        }

        .header-content {
            position: relative;
            z-index: 1;
        }

        .app-title {
            font-size: 1.8rem;
            font-weight: 800;
            margin-bottom: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 12px;
        }

        .app-subtitle {
            font-size: 0.9rem;
            opacity: 0.8;
            font-weight: 400;
            color: var(--text-secondary);
        }

        /* Game Info */
        .game-info {
            padding: 20px;
            background: var(--bg-secondary);
            border-bottom: 1px solid var(--border);
        }

        .game-status {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 16px;
        }

        .round-info {
            background: var(--bg-card);
            border: 1px solid var(--border);
            padding: 12px 16px;
            border-radius: 8px;
            box-shadow: var(--shadow);
        }

        .round-label {
            font-size: 0.8rem;
            color: var(--accent);
            font-weight: 600;
            margin-bottom: 4px;
        }

        .round-number {
            font-size: 1.4rem;
            font-weight: 700;
            color: var(--text-primary);
        }

        .winning-score {
            text-align: center;
            font-size: 0.9rem;
            color: var(--text-secondary);
            font-weight: 500;
        }

        .target-score {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--accent);
        }

        .game-timer {
            text-align: center;
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-top: 8px;
        }

        .turn-indicator {
            text-align: center;
            font-size: 0.9rem;
            color: var(--warning);
            margin-top: 8px;
            font-weight: 600;
        }

        /* Players */
        .players-container {
            padding: 24px 20px;
            background: var(--bg-primary);
        }

        .player {
            background: var(--bg-card);
            border: 2px solid var(--border);
            border-radius: var(--border-radius);
            margin-bottom: 20px;
            overflow: hidden;
            transition: var(--transition);
            box-shadow: var(--shadow);
        }

        .player.leading {
            border-color: var(--accent);
            box-shadow: 0 4px 20px rgba(255, 107, 53, 0.3);
        }

        .player.winner {
            border-color: var(--success);
            box-shadow: 0 4px 20px rgba(34, 197, 94, 0.3);
        }

        .player.challenger {
            border-color: var(--warning);
            box-shadow: 0 4px 20px rgba(245, 158, 11, 0.3);
        }

        .player-header {
            padding: 16px 20px;
            background: var(--bg-secondary);
            border-bottom: 1px solid var(--border);
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .player.leading .player-header {
            background: linear-gradient(135deg, rgba(255, 107, 53, 0.15) 0%, var(--bg-secondary) 100%);
        }

        .player.winner .player-header {
            background: linear-gradient(135deg, rgba(34, 197, 94, 0.15) 0%, var(--bg-secondary) 100%);
        }

        .player.challenger .player-header {
            background: linear-gradient(135deg, rgba(245, 158, 11, 0.15) 0%, var(--bg-secondary) 100%);
        }

        .player-name {
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--text-primary);
            flex: 1;
            margin-right: 12px;
        }

        .player-name input {
            background: none;
            border: none;
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--text-primary);
            width: 100%;
            padding: 4px 0;
            border-bottom: 2px solid transparent;
            transition: var(--transition);
        }

        .player-name input:focus {
            outline: none;
            border-bottom-color: var(--accent);
        }

        .player-name input::placeholder {
            color: var(--text-muted);
        }

        .player-status {
            font-size: 0.8rem;
            color: var(--text-muted);
            margin-left: 8px;
        }

        .player.challenger .player-status {
            color: var(--warning);
            font-weight: 600;
        }

        .player-score {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--text-primary);
            min-width: 60px;
            text-align: right;
            position: relative;
        }

        .player.winner .player-score {
            color: var(--success);
        }

        .score-history {
            position: absolute;
            top: -8px;
            right: -8px;
            background: var(--accent);
            color: var(--white);
            font-size: 0.7rem;
            padding: 2px 6px;
            border-radius: 10px;
            opacity: 0;
            transform: translateY(-10px);
            transition: var(--transition);
        }

        .score-history.show {
            opacity: 1;
            transform: translateY(0);
        }

        .player-controls {
            padding: 20px;
            display: flex;
            gap: 12px;
            background: var(--bg-card);
        }

        .score-btn {
            flex: 1;
            padding: 16px 12px;
            border: none;
            border-radius: 10px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 6px;
            box-shadow: var(--shadow);
        }

        .hole-btn {
            background: linear-gradient(135deg, var(--success) 0%, var(--success-dark) 100%);
            color: var(--white);
        }

        .hole-btn:hover, .hole-btn:active {
            transform: translateY(-2px);
            box-shadow: 0 4px 16px rgba(34, 197, 94, 0.4);
        }

        .board-btn {
            background: linear-gradient(135deg, var(--warning) 0%, var(--warning-dark) 100%);
            color: var(--white);
        }

        .board-btn:hover, .board-btn:active {
            transform: translateY(-2px);
            box-shadow: 0 4px 16px rgba(245, 158, 11, 0.4);
        }

        .undo-btn {
            background: linear-gradient(135deg, var(--danger) 0%, var(--danger-dark) 100%);
            color: var(--white);
            flex: 0.6;
        }

        .undo-btn:hover, .undo-btn:active {
            transform: translateY(-2px);
            box-shadow: 0 4px 16px rgba(239, 68, 68, 0.4);
        }

        .btn-icon {
            font-size: 1.2rem;
        }

        .btn-text {
            font-size: 0.85rem;
            font-weight: 600;
        }

        .btn-points {
            font-size: 0.75rem;
            opacity: 0.9;
        }

        /* Game Controls */
        .game-controls {
            padding: 20px;
            background: var(--bg-secondary);
            border-top: 1px solid var(--border);
        }

        .control-btn {
            width: 100%;
            padding: 16px;
            border: none;
            border-radius: 10px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            margin-bottom: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            box-shadow: var(--shadow);
        }

        .reset-btn {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            color: var(--text-primary);
            border: 1px solid var(--border);
        }

        .reset-btn:hover, .reset-btn:active {
            transform: translateY(-2px);
            box-shadow: 0 4px 16px rgba(26, 26, 26, 0.4);
            border-color: var(--accent);
        }

        /* Tournament Setup */
        .tournament-setup {
            padding: 20px;
        }

        .player-list {
            margin-bottom: 20px;
        }

        .player-input {
            display: flex;
            gap: 8px;
            margin-bottom: 12px;
        }

        .player-input input {
            flex: 1;
            padding: 12px;
            background: var(--bg-secondary);
            border: 1px solid var(--border);
            border-radius: 8px;
            color: var(--text-primary);
            font-size: 1rem;
        }

        .player-input input::placeholder {
            color: var(--text-muted);
        }

        .player-input button {
            padding: 12px 16px;
            background: var(--accent);
            border: none;
            border-radius: 8px;
            color: var(--white);
            cursor: pointer;
            transition: var(--transition);
        }

        .player-input button:hover {
            background: var(--accent-dark);
        }

        .tournament-players {
            background: var(--bg-secondary);
            border: 1px solid var(--border);
            border-radius: 8px;
            padding: 16px;
            margin-bottom: 20px;
            max-height: 300px;
            overflow-y: auto;
        }

        .tournament-player {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 12px 0;
            border-bottom: 1px solid var(--border);
        }

        .tournament-player:last-child {
            border-bottom: none;
        }

        .tournament-player-name {
            font-weight: 600;
            color: var(--text-primary);
        }

        .tournament-player-record {
            font-size: 0.9rem;
            color: var(--text-secondary);
        }

        .remove-player {
            background: var(--danger);
            border: none;
            color: var(--white);
            width: 24px;
            height: 24px;
            border-radius: 50%;
            cursor: pointer;
            font-size: 0.8rem;
        }

        /* Tournament Bracket */
        .bracket {
            padding: 20px;
        }

        .bracket-round {
            margin-bottom: 24px;
        }

        .bracket-title {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--accent);
            margin-bottom: 16px;
            text-align: center;
        }

        .bracket-match {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: 8px;
            padding: 16px;
            margin-bottom: 12px;
            cursor: pointer;
            transition: var(--transition);
        }

        .bracket-match:hover {
            border-color: var(--accent);
        }

        .bracket-match.active {
            border-color: var(--success);
            background: rgba(34, 197, 94, 0.1);
        }

        .bracket-match.completed {
            opacity: 0.7;
        }

        .match-players {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 8px;
        }

        .match-player {
            font-weight: 600;
            color: var(--text-primary);
        }

        .match-player.winner {
            color: var(--success);
        }

        .match-vs {
            color: var(--text-muted);
            font-size: 0.9rem;
        }

        .match-score {
            text-align: center;
            font-size: 0.9rem;
            color: var(--text-secondary);
        }

        /* Score History */
        .score-history-container {
            padding: 20px;
            max-height: 400px;
            overflow-y: auto;
        }

        .history-item {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: 8px;
            padding: 16px;
            margin-bottom: 12px;
            position: relative;
        }

        .history-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 8px;
        }

        .history-players {
            font-weight: 600;
            color: var(--text-primary);
        }

        .history-time {
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        .history-score {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--accent);
            text-align: center;
            margin-bottom: 8px;
        }

        .history-duration {
            font-size: 0.8rem;
            color: var(--text-secondary);
            text-align: center;
        }

        .delete-history {
            position: absolute;
            top: 8px;
            right: 8px;
            background: var(--danger);
            border: none;
            color: var(--white);
            width: 20px;
            height: 20px;
            border-radius: 50%;
            cursor: pointer;
            font-size: 0.7rem;
            opacity: 0.7;
            transition: var(--transition);
        }

        .delete-history:hover {
            opacity: 1;
        }

        /* Winner Modal */
        .modal {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(0, 0, 0, 0.9);
            display: flex;
            align-items: center;
            justify-content: center;
            z-index: 1000;
            opacity: 0;
            visibility: hidden;
            transition: var(--transition);
            padding: 20px;
        }

        .modal.show {
            opacity: 1;
            visibility: visible;
        }

        .modal-content {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--border-radius);
            padding: 32px 24px;
            text-align: center;
            max-width: 320px;
            width: 100%;
            transform: scale(0.8);
            transition: var(--transition);
            box-shadow: var(--shadow-lg);
        }

        .modal.show .modal-content {
            transform: scale(1);
        }

        .winner-icon {
            font-size: 4rem;
            color: var(--accent);
            margin-bottom: 16px;
        }

        .winner-text {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 8px;
        }

        .winner-subtitle {
            font-size: 1rem;
            color: var(--text-secondary);
            margin-bottom: 24px;
        }

        .modal-btn {
            background: linear-gradient(135deg, var(--accent) 0%, var(--accent-dark) 100%);
            color: var(--white);
            border: none;
            padding: 12px 24px;
            border-radius: 8px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            margin: 0 8px;
            box-shadow: var(--shadow);
        }

        .modal-btn:hover, .modal-btn:active {
            transform: translateY(-2px);
            box-shadow: 0 4px 16px rgba(255, 107, 53, 0.4);
        }

        .modal-btn.secondary {
            background: linear-gradient(135deg, var(--secondary) 0%, var(--primary) 100%);
            border: 1px solid var(--border);
        }

        .modal-btn.secondary:hover, .modal-btn.secondary:active {
            box-shadow: 0 4px 16px rgba(45, 45, 45, 0.4);
        }

        /* Help Button */
        .help-btn {
            position: absolute;
            top: 50%;
            right: 20px;
            transform: translateY(-50%);
            background: rgba(255,255,255,0.1);
            border: 1px solid rgba(255,255,255,0.2);
            color: var(--text-primary);
            width: 36px;
            height: 36px;
            border-radius: 50%;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1rem;
            transition: var(--transition);
        }

        .help-btn:hover {
            background: rgba(255,255,255,0.2);
            border-color: var(--accent);
        }

        /* Animations */
        @keyframes scoreUpdate {
            0% { transform: scale(1); }
            50% { transform: scale(1.1); }
            100% { transform: scale(1); }
        }

        .score-animate {
            animation: scoreUpdate 0.3s ease-in-out;
        }

        @keyframes targetUpdate {
            0% { transform: scale(1); color: var(--accent); }
            50% { transform: scale(1.1); color: var(--success); }
            100% { transform: scale(1); color: var(--accent); }
        }

        .target-animate {
            animation: targetUpdate 0.5s ease-in-out;
        }

        @keyframes fall {
            0% {
                transform: translateY(-10px) rotate(0deg);
                opacity: 1;
            }
            100% {
                transform: translateY(100vh) rotate(360deg);
                opacity: 0;
            }
        }

        /* Responsive */
        @media (max-width: 480px) {
            body {
                padding: 10px;
            }

            .app-title {
                font-size: 1.6rem;
            }

            .player-score {
                font-size: 2rem;
            }

            .score-btn {
                padding: 14px 10px;
                font-size: 0.9rem;
            }

            .btn-icon {
                font-size: 1.1rem;
            }
        }

        /* Touch feedback */
        .score-btn:active,
        .control-btn:active,
        .modal-btn:active {
            transform: translateY(0) scale(0.98);
        }

        /* Tournament Styles */
.tournament-active {
    padding: 0;
}

.current-match {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    padding: 20px;
    text-align: center;
}

.match-header h3 {
    color: var(--accent);
    font-size: 1.2rem;
    margin-bottom: 8px;
}

.match-info {
    color: var(--text-secondary);
    font-size: 1rem;
}

.tournament-bracket-simple {
    padding: 20px;
    max-height: 400px;
    overflow-y: auto;
}

.tournament-round {
    margin-bottom: 24px;
}

.tournament-round-title {
    background: var(--bg-secondary);
    color: var(--accent);
    padding: 12px 16px;
    border-radius: 8px;
    font-weight: 700;
    font-size: 1.1rem;
    text-align: center;
    margin-bottom: 16px;
    border: 1px solid var(--border);
}

.tournament-match {
    background: var(--bg-card);
    border: 2px solid var(--border);
    border-radius: 12px;
    margin-bottom: 12px;
    overflow: hidden;
    transition: var(--transition);
    cursor: pointer;
}

.tournament-match:hover {
    border-color: var(--accent);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.tournament-match.active {
    border-color: var(--success);
    background: rgba(34, 197, 94, 0.1);
}

.tournament-match.completed {
    opacity: 0.7;
    cursor: default;
}

.tournament-match.completed:hover {
    transform: none;
    border-color: var(--border);
}

.match-players {
    padding: 16px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.match-player {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 1rem;
    flex: 1;
    text-align: center;
}

.match-player.winner {
    color: var(--success);
}

.match-player.bye {
    color: var(--text-muted);
    font-style: italic;
}

.match-vs {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin: 0 16px;
    font-weight: 500;
}

.match-status {
    background: var(--bg-secondary);
    padding: 12px 20px;
    text-align: center;
    font-size: 0.9rem;
    color: var(--text-secondary);
    border-top: 1px solid var(--border);
}

.match-status.can-play {
    color: var(--accent);
    font-weight: 600;
}

.match-status.completed {
    color: var(--success);
}

.tournament-controls {
    padding: 20px;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
}

.tournament-winner {
    background: linear-gradient(135deg, var(--success) 0%, var(--success-dark) 100%);
    color: var(--white);
    padding: 24px;
    text-align: center;
    margin: 20px;
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
}

.tournament-winner h3 {
    font-size: 1.5rem;
    margin-bottom: 8px;
}

.tournament-winner p {
    font-size: 1rem;
    opacity: 0.9;
}

/* Mobile optimizations */
@media (max-width: 480px) {
    .match-players {
        padding: 12px 16px;
        flex-direction: column;
        gap: 8px;
    }
    
    .match-vs {
        margin: 0;
        order: 2;
    }
    
    .match-player {
        font-size: 0.9rem;
    }
    
    .tournament-bracket-simple {
        padding: 16px;
    }
    
    .tournament-round-title {
        font-size: 1rem;
        padding: 10px 12px;
    }
}