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

:root {
    --primary-color: #8B4513;
    --secondary-color: #D2691E;
    --background-color: #F5DEB3;
    --board-color: #DEB887;
    --line-color: #8B4513;
    --text-color: #333;
    --white-piece: #FFFFFF;
    --black-piece: #1a1a1a;
    --shadow-color: rgba(0, 0, 0, 0.3);
    --highlight-color: #FFD700;
}

body {
    font-family: 'Microsoft YaHei', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    color: var(--text-color);
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
}

header {
    text-align: center;
    margin-bottom: 20px;
}

header h1 {
    font-size: 2.5rem;
    color: white;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.game-container {
    display: flex;
    gap: 20px;
    justify-content: center;
    align-items: flex-start;
    flex-wrap: wrap;
}

.sidebar {
    width: 250px;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.panel {
    background: white;
    border-radius: 12px;
    padding: 15px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.panel h3 {
    font-size: 1rem;
    margin-bottom: 12px;
    padding-bottom: 8px;
    border-bottom: 2px solid var(--primary-color);
    color: var(--primary-color);
}

.mode-buttons, .difficulty-buttons {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.mode-btn, .diff-btn, .control-btn {
    padding: 10px 15px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: all 0.3s ease;
    background: #f0f0f0;
    color: var(--text-color);
}

.mode-btn:hover, .diff-btn:hover, .control-btn:hover {
    background: var(--secondary-color);
    color: white;
    transform: translateY(-2px);
}

.mode-btn.active, .diff-btn.active {
    background: var(--primary-color);
    color: white;
}

.piece-styles {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 8px;
}

.piece-style {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 10px;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    background: #f8f8f8;
}

.piece-style:hover {
    background: #e8e8e8;
}

.piece-style.active {
    background: var(--highlight-color);
    box-shadow: 0 2px 8px rgba(255, 215, 0, 0.5);
}

.piece-preview {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    margin-bottom: 5px;
}

.piece-preview.classic.black {
    background: radial-gradient(circle at 30% 30%, #6a6a6a, #1a1a1a);
    box-shadow: 2px 2px 4px rgba(0, 0, 0, 0.4);
}

.piece-preview.classic.white {
    background: radial-gradient(circle at 30% 30%, #ffffff, #e0e0e0);
    box-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2);
    border: 1px solid #ccc;
}

.piece-preview.modern.black {
    background: linear-gradient(135deg, #4a4a4a, #1a1a1a);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.5);
}

.piece-preview.modern.white {
    background: linear-gradient(135deg, #ecf0f1, #bdc3c7);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
}

.piece-preview.cute.black {
    background: radial-gradient(circle at 30% 30%, #5a5a5a, #1a1a1a);
    box-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
    position: relative;
}

.piece-preview.cute.black::after {
    content: '';
    position: absolute;
    width: 8px;
    height: 8px;
    background: rgba(255, 255, 255, 0.5);
    border-radius: 50%;
    top: 5px;
    left: 6px;
}

.piece-preview.cute.white {
    background: radial-gradient(circle at 30% 30%, #ffffff, #e8e8e8);
    box-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2);
    border: 1px solid rgba(200, 200, 200, 0.5);
    position: relative;
}

.piece-preview.cute.white::after {
    content: '';
    position: absolute;
    width: 10px;
    height: 10px;
    background: rgba(255, 255, 255, 0.9);
    border-radius: 50%;
    top: 4px;
    left: 5px;
}

.piece-preview.neon.black {
    background: radial-gradient(circle, #1a1a2e, #0f0f23);
    box-shadow: 0 0 10px #00ffff;
    border: 2px solid #00ffff;
}

.piece-preview.neon.white {
    background: radial-gradient(circle, #ffffff, #e0e0e0);
    box-shadow: 0 0 10px #ff00ff;
    border: 2px solid #ff00ff;
}

.piece-preview.wood.black {
    background: radial-gradient(circle at 30% 30%, #5D4037, #1B0000);
    box-shadow: 2px 2px 4px rgba(0, 0, 0, 0.4);
}

.piece-preview.wood.white {
    background: radial-gradient(circle at 30% 30%, #FFF8E1, #D7CCC8);
    box-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2);
    border: 1px solid rgba(161, 136, 127, 0.4);
}

.piece-preview.metal.black {
    background: linear-gradient(135deg, #4a4a4a, #0a0a0a);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.5);
}

.piece-preview.metal.white {
    background: linear-gradient(135deg, #ffffff, #a0a0a0);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
    border: 1px solid #888888;
}

.piece-preview.glass.black {
    background: radial-gradient(circle at 30% 30%, rgba(80, 80, 80, 0.9), rgba(20, 20, 20, 0.8));
    box-shadow: 2px 4px 10px rgba(0, 0, 0, 0.3);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.piece-preview.glass.white {
    background: radial-gradient(circle at 30% 30%, rgba(255, 255, 255, 0.95), rgba(220, 220, 220, 0.85));
    box-shadow: 2px 4px 10px rgba(0, 0, 0, 0.25);
    border: 1px solid rgba(200, 200, 200, 0.6);
}

.piece-preview.gradient.black {
    background: linear-gradient(135deg, #1a237e, #4a148c, #880e4f, #1a1a1a);
    box-shadow: 2px 2px 4px rgba(0, 0, 0, 0.4);
}

.piece-preview.gradient.white {
    background: linear-gradient(135deg, #e3f2fd, #f3e5f5, #fce4ec, #e0e0e0);
    box-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2);
    border: 1px solid rgba(200, 200, 200, 0.5);
}

.piece-preview.classic.white {
    background: radial-gradient(circle at 30% 30%, #ffffff, #e0e0e0);
    box-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2);
    border: 1px solid #ccc;
}

.piece-preview.modern.black {
    background: linear-gradient(135deg, #2c3e50, #000);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.5);
}

.piece-preview.modern.white {
    background: linear-gradient(135deg, #ecf0f1, #bdc3c7);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
}

.piece-style span:last-child {
    font-size: 0.75rem;
    color: var(--text-color);
}

.board-area {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
}

.game-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    max-width: 600px;
    background: white;
    padding: 15px 25px;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.player-info {
    display: flex;
    align-items: center;
    gap: 10px;
}

.player-piece {
    width: 25px;
    height: 25px;
    border-radius: 50%;
}

.player-piece.black {
    background: radial-gradient(circle at 30% 30%, #4a4a4a, var(--black-piece));
    box-shadow: 2px 2px 4px rgba(0, 0, 0, 0.4);
}

.player-piece.white {
    background: radial-gradient(circle at 30% 30%, #ffffff, #e0e0e0);
    box-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2);
    border: 1px solid #ccc;
}

.player-name {
    font-weight: bold;
    color: var(--text-color);
}

.player-time {
    font-family: 'Courier New', monospace;
    font-size: 1rem;
    color: var(--primary-color);
}

.turn-indicator {
    font-size: 1.1rem;
    font-weight: bold;
    color: var(--primary-color);
    padding: 8px 16px;
    background: var(--background-color);
    border-radius: 20px;
}

.board-wrapper {
    background: var(--board-color);
    padding: 20px;
    border-radius: 12px;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.3);
    position: relative;
}

#gameBoard {
    display: block;
    cursor: pointer;
}

.game-controls {
    display: flex;
    gap: 10px;
}

.control-btn {
    padding: 12px 24px;
    font-size: 1rem;
}

.control-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.move-history {
    max-height: 200px;
    overflow-y: auto;
    font-size: 0.85rem;
}

.move-history p {
    padding: 5px 0;
    border-bottom: 1px solid #eee;
}

.move-history p:last-child {
    border-bottom: none;
}

.no-moves {
    color: #999;
    text-align: center;
}

.game-stats {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.stat-item {
    display: flex;
    justify-content: space-between;
    padding: 8px;
    background: #f8f8f8;
    border-radius: 6px;
}

.stat-label {
    color: #666;
}

.stat-value {
    font-weight: bold;
    color: var(--primary-color);
}

.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.modal.hidden {
    display: none;
}

.modal-content {
    background: white;
    padding: 30px;
    border-radius: 16px;
    text-align: center;
    max-width: 400px;
    animation: modalIn 0.3s ease;
}

@keyframes modalIn {
    from {
        transform: scale(0.8);
        opacity: 0;
    }
    to {
        transform: scale(1);
        opacity: 1;
    }
}

.modal-content h2 {
    color: var(--primary-color);
    margin-bottom: 15px;
}

.modal-content p {
    margin-bottom: 20px;
    color: #666;
}

.modal-buttons {
    display: flex;
    gap: 10px;
    justify-content: center;
}

.modal-buttons button {
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1rem;
    transition: all 0.3s ease;
}

#playAgainBtn {
    background: var(--primary-color);
    color: white;
}

#playAgainBtn:hover {
    background: var(--secondary-color);
}

#closeModalBtn {
    background: #e0e0e0;
    color: var(--text-color);
}

#closeModalBtn:hover {
    background: #d0d0d0;
}

.lan-controls {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.server-status {
    padding: 8px 12px;
    background: #f0f0f0;
    border-radius: 6px;
    font-size: 0.9rem;
}

.status-connected {
    color: #4CAF50;
    font-weight: bold;
}

.status-disconnected {
    color: #f44336;
    font-weight: bold;
}

.lan-controls input {
    padding: 10px;
    border: 2px solid #ddd;
    border-radius: 8px;
    font-size: 0.9rem;
}

.lan-controls input:focus {
    outline: none;
    border-color: var(--primary-color);
}

.lan-controls button {
    padding: 10px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    background: var(--primary-color);
    color: white;
    font-size: 0.9rem;
    transition: all 0.3s ease;
}

.lan-controls button:hover {
    background: var(--secondary-color);
}

.lan-controls button:disabled {
    background: #ccc;
    cursor: not-allowed;
}

.room-actions {
    display: flex;
    gap: 10px;
}

.room-actions button {
    flex: 1;
}

.room-code-display {
    font-size: 1.1rem;
    text-align: center;
    padding: 15px;
    background: #f8f8f8;
    border-radius: 8px;
    margin: 10px 0;
}

.room-code-display span {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
    letter-spacing: 3px;
}

.room-hint {
    text-align: center;
    color: #666;
    font-size: 0.85rem;
}

.room-status-text {
    text-align: center;
    color: #888;
    font-size: 0.85rem;
    margin-top: 5px;
}

#joinRoomPanel {
    display: flex;
    gap: 10px;
    margin-top: 10px;
}

#joinRoomPanel input {
    flex: 1;
    text-transform: uppercase;
}

#joinRoomPanel button {
    flex-shrink: 0;
}

.lan-game-info {
    background: #f8f8f8;
    padding: 12px;
    border-radius: 8px;
    margin-bottom: 10px;
}

.lan-game-info p {
    margin: 5px 0;
    font-size: 0.9rem;
}

.role-display {
    font-weight: bold;
    color: var(--primary-color);
}

.swap-btn {
    width: 100%;
    padding: 10px;
    background: #9b59b6;
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: all 0.3s ease;
}

.swap-btn:hover {
    background: #8e44ad;
    transform: translateY(-2px);
}

.swap-btn:disabled {
    background: #ccc;
    cursor: not-allowed;
    transform: none;
}

.hidden {
    display: none !important;
}

.player-info.active {
    background: var(--highlight-color);
    padding: 10px 15px;
    border-radius: 8px;
}

@media (max-width: 1200px) {
    .game-container {
        flex-direction: column;
        align-items: center;
    }
    
    .sidebar {
        width: 100%;
        max-width: 600px;
        flex-direction: row;
        flex-wrap: wrap;
    }
    
    .sidebar .panel {
        flex: 1;
        min-width: 200px;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 10px;
    }
    
    header h1 {
        font-size: 1.8rem;
    }
    
    .game-info {
        flex-direction: column;
        gap: 10px;
        padding: 10px;
    }
    
    .board-wrapper {
        padding: 10px;
    }
    
    .game-controls {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .control-btn {
        padding: 10px 16px;
        font-size: 0.9rem;
    }
    
    .sidebar {
        flex-direction: column;
    }
    
    .sidebar .panel {
        min-width: 100%;
    }
}

@media (max-width: 480px) {
    header h1 {
        font-size: 1.5rem;
    }
    
    .mode-buttons {
        flex-direction: row;
        flex-wrap: wrap;
    }
    
    .mode-btn {
        flex: 1;
        min-width: 80px;
        padding: 8px;
        font-size: 0.8rem;
    }
    
    .piece-styles {
        grid-template-columns: repeat(4, 1fr);
    }
    
    .piece-style {
        padding: 5px;
    }
    
    .piece-preview {
        width: 25px;
        height: 25px;
    }
}

.last-move-hint {
    position: absolute;
    width: 10px;
    height: 10px;
    background: red;
    border-radius: 50%;
    pointer-events: none;
}

.win-line {
    stroke: red;
    stroke-width: 4;
    stroke-linecap: round;
}

.game-notification {
    position: fixed;
    top: 80px;
    left: 50%;
    transform: translateX(-50%) translateY(-20px);
    padding: 15px 30px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1rem;
    font-weight: 500;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    z-index: 2000;
    opacity: 0;
    transition: all 0.3s ease;
}

.game-notification.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

.game-notification.success {
    background: linear-gradient(135deg, #4CAF50, #45a049);
    color: white;
}

.game-notification.error {
    background: linear-gradient(135deg, #f44336, #d32f2f);
    color: white;
}

.game-notification.info {
    background: linear-gradient(135deg, #2196F3, #1976D2);
    color: white;
}

.game-notification.warning {
    background: linear-gradient(135deg, #ff9800, #f57c00);
    color: white;
}

.notification-icon {
    font-size: 1.3rem;
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
}

.notification-message {
    letter-spacing: 0.5px;
}

.confirm-dialog-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 3000;
    backdrop-filter: blur(4px);
}

.confirm-dialog {
    background: white;
    border-radius: 16px;
    padding: 0;
    min-width: 320px;
    max-width: 400px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
    transform: scale(0.9);
    opacity: 0;
    transition: all 0.3s ease;
    overflow: hidden;
}

.confirm-dialog.show {
    transform: scale(1);
    opacity: 1;
}

.confirm-dialog-header {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 18px 24px;
    font-size: 1.15rem;
    font-weight: 600;
}

.confirm-dialog-body {
    padding: 24px;
    color: #555;
    font-size: 1rem;
    line-height: 1.6;
    text-align: center;
}

.confirm-dialog-buttons {
    display: flex;
    gap: 0;
    border-top: 1px solid #eee;
}

.confirm-btn {
    flex: 1;
    padding: 16px;
    border: none;
    background: transparent;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

.confirm-btn.accept {
    color: #4CAF50;
    border-right: 1px solid #eee;
}

.confirm-btn.accept:hover {
    background: rgba(76, 175, 80, 0.1);
}

.confirm-btn.reject {
    color: #f44336;
}

.confirm-btn.reject:hover {
    background: rgba(244, 67, 54, 0.1);
}

.board-styles {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 8px;
    margin-bottom: 15px;
}

.board-style {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 8px;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    background: #f8f8f8;
}

.board-style:hover {
    background: #e8e8e8;
}

.board-style.active {
    background: var(--highlight-color);
    box-shadow: 0 2px 8px rgba(255, 215, 0, 0.5);
}

.board-preview {
    width: 40px;
    height: 40px;
    border-radius: 6px;
    margin-bottom: 5px;
    border: 2px solid #ccc;
}

.board-preview.classic-board {
    background: linear-gradient(135deg, #DEB887, #D2B48C);
}

.board-preview.bamboo-board {
    background: linear-gradient(135deg, #C5E1A5, #9CCC65);
}

.board-preview.dark-board {
    background: linear-gradient(135deg, #424242, #212121);
}

.board-preview.marble-board {
    background: linear-gradient(135deg, #ECEFF1, #E0E0E0);
}

.board-style span:last-child {
    font-size: 0.7rem;
    color: var(--text-color);
}

.board-options {
    border-top: 1px solid #eee;
    padding-top: 12px;
    margin-top: 5px;
}

.option-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 10px;
}

.option-row:last-child {
    margin-bottom: 0;
}

.option-row label {
    font-size: 0.85rem;
    color: #666;
}

.option-row select,
.option-row input[type="color"] {
    padding: 6px 10px;
    border: 1px solid #ddd;
    border-radius: 6px;
    font-size: 0.85rem;
    background: white;
    cursor: pointer;
}

.option-row select:focus,
.option-row input[type="color"]:focus {
    outline: none;
    border-color: var(--primary-color);
}

.option-row input[type="color"] {
    width: 50px;
    height: 32px;
    padding: 2px;
}

.display-options {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.toggle-option {
    display: flex;
    flex-direction: column;
    cursor: pointer;
    padding: 10px;
    border-radius: 8px;
    transition: background 0.2s ease;
    position: relative;
}

.toggle-option:hover {
    background: #f5f5f5;
}

.toggle-option input[type="checkbox"] {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-label {
    display: flex;
    align-items: center;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-color);
    margin-bottom: 4px;
    position: relative;
    padding-left: 50px;
}

.toggle-label::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 40px;
    height: 22px;
    background: #ddd;
    border-radius: 11px;
    transition: all 0.3s ease;
}

.toggle-label::after {
    content: '';
    position: absolute;
    left: 2px;
    top: 50%;
    transform: translateY(-50%);
    width: 18px;
    height: 18px;
    background: white;
    border-radius: 50%;
    transition: all 0.3s ease;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.toggle-option input[type="checkbox"]:checked + .toggle-label::before {
    background: var(--primary-color);
}

.toggle-option input[type="checkbox"]:checked + .toggle-label::after {
    left: 20px;
}

.toggle-hint {
    font-size: 0.75rem;
    color: #999;
    padding-left: 50px;
}

.container.pure-mode {
    padding: 10px;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.container.pure-mode header {
    margin-bottom: 10px;
}

.container.pure-mode header h1 {
    font-size: 1.5rem;
}

.container.pure-mode .sidebar {
    display: none;
}

.container.pure-mode .game-container {
    flex-direction: column;
    align-items: center;
    flex: 1;
    width: 100%;
}

.container.pure-mode .board-area {
    width: 100%;
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    max-width: 100%;
}

.container.pure-mode .board-wrapper {
    width: calc(100vw - 20px);
    max-width: calc(100vh - 180px);
    aspect-ratio: 1;
    padding: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.container.pure-mode .game-info {
    padding: 10px 15px;
    width: calc(100vw - 20px);
    max-width: 600px;
}

.container.pure-mode .game-controls {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    background: white;
    padding: 10px 20px;
    border-radius: 30px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
    z-index: 100;
}

.container.pure-mode .control-btn {
    padding: 8px 16px;
    font-size: 0.85rem;
}

@media (max-width: 768px) {
    .container.pure-mode {
        padding: 5px;
    }
    
    .container.pure-mode header {
        margin-bottom: 5px;
    }
    
    .container.pure-mode header h1 {
        font-size: 1.2rem;
    }
    
    .container.pure-mode .board-wrapper {
        width: calc(100vw - 10px);
        max-width: calc(100vh - 160px);
        padding: 8px;
    }
    
    .container.pure-mode .game-info {
        padding: 8px 10px;
        width: calc(100vw - 10px);
    }
    
    .container.pure-mode .game-controls {
        bottom: 10px;
        padding: 8px 15px;
    }
    
    .container.pure-mode .control-btn {
        padding: 6px 12px;
        font-size: 0.8rem;
    }
}

.pure-mode-toggle {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1000;
    background: white;
    border: none;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
    transition: all 0.3s ease;
}

.pure-mode-toggle:hover {
    transform: scale(1.1);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
}

.container.pure-mode .pure-mode-toggle {
    background: var(--primary-color);
    color: white;
}

.pure-mode-exit {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1001;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
    transition: all 0.3s ease;
}

.pure-mode-exit:hover {
    transform: scale(1.1);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.4);
    background: var(--secondary-color);
}

.pure-mode-exit.hidden {
    display: none;
}