:root {
    --primary-color: #2c3e50;
    --secondary-color: #3498db;
    --accent-color: #e74c3c;
    --light-color: #ecf0f1;
    --dark-color: #2c3e50;
    --text-color: #34495e;
    --highlight-color: #f39c12;
    --success-color: #27ae60;
    --expert-color: #9b59b6;
    --master-color: #e67e22;
    --vct-color: #9b59b6;
    --vcf-color: #e74c3c;
    --player-color: #27ae60;
    --player-light: rgba(39, 174, 96, 0.1);
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

body {
    font-family: 'Helvetica Neue', Arial, sans-serif;
    color: var(--text-color);
    background-color: #f5f7fa;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 2rem;
    display: grid;
    grid-template-columns: 280px 1fr 280px;
    gap: 2rem;
}

header {
    background: linear-gradient(135deg, var(--primary-color), var(--dark-color));
    color: white;
    padding: 1.5rem 0;
    box-shadow: var(--shadow);
    position: relative;
    z-index: 10;
}

.header-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.8rem;
    font-weight: 700;
    letter-spacing: 1px;
    display: flex;
    align-items: center;
}

.logo i {
    margin-right: 0.8rem;
    color: var(--highlight-color);
}

.game-board {
    background-color: white;
    border-radius: 8px;
    box-shadow: var(--shadow);
    padding: 2rem;
    position: relative;
    overflow: hidden;
    grid-column: 2;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.board-title {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    color: var(--primary-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid #eee;
    padding-bottom: 0.5rem;
    width: 100%;
}

#board-container {
    width: 100%;
    max-width: 800px;
    height: auto;
    aspect-ratio: 1/1;
    display: flex;
    justify-content: center;
    align-items: center;
}

canvas {
    background-color: #f8f1e5;
    border: 1px solid #ddd;
    display: block;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.05);
    transition: var(--transition);
    width: 100%;
    height: auto;
    max-width: 800px;
    /* 触摸优化 */
    touch-action: manipulation;
    -webkit-touch-callout: none;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
    -webkit-tap-highlight-color: transparent;
}

canvas:hover {
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.1);
}

.game-controls {
    background-color: white;
    border-radius: 8px;
    box-shadow: var(--shadow);
    padding: 2rem;
    display: flex;
    flex-direction: column;
}

.left-controls {
    grid-column: 1;
}

.right-controls {
    grid-column: 3;
}

.control-section {
    margin-bottom: 1.5rem;
}

.control-title {
    font-size: 1.1rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
    display: flex;
    align-items: center;
}

.control-title i {
    margin-right: 0.5rem;
    color: var(--secondary-color);
}

.centered-title {
    justify-content: center;
}

.btn-group {
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
}

.btn-group-wide {
    flex-direction: row;
}

.btn-group-wide .btn {
    flex: 1;
    padding: 0.8rem 2.5rem;
}

.btn {
    padding: 0.8rem 1.2rem;
    border: none;
    border-radius: 6px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    white-space: nowrap;
}

.btn i {
    margin-right: 0.5rem;
}

.btn-primary {
    background-color: var(--secondary-color);
    color: white;
}

.btn-primary:hover {
    background-color: #2980b9;
    transform: translateY(-2px);
}

.btn-secondary {
    background-color: var(--light-color);
    color: var(--text-color);
}

.btn-secondary:hover {
    background-color: #dfe6e9;
    transform: translateY(-2px);
}

.btn-danger {
    background-color: var(--accent-color);
    color: white;
}

.btn-danger:hover {
    background-color: #c0392b;
    transform: translateY(-2px);
}

.btn-success {
    background-color: var(--success-color);
    color: white;
}

.btn-success:hover {
    background-color: #219653;
    transform: translateY(-2px);
}

.btn-expert {
    background-color: var(--expert-color);
    color: white;
}

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

.btn-master {
    background-color: var(--master-color);
    color: white;
}

.btn-master:hover {
    background-color: #d35400;
    transform: translateY(-2px);
}


.radio-group {
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
}

.radio-option {
    display: flex;
    align-items: center;
    padding: 0.5rem;
    border-radius: 6px;
    transition: var(--transition);
    cursor: pointer;
}

.radio-option:hover {
    background-color: rgba(52, 152, 219, 0.1);
}

.radio-option input {
    margin-right: 0.8rem;
}

/* AI智能设置 - 复选框组美化 */
.checkbox-group {
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
}

.checkbox-option {
    display: flex;
    align-items: center;
    padding: 0.8rem 1rem;
    border-radius: 8px;
    transition: var(--transition);
    cursor: pointer;
    background-color: rgba(52, 152, 219, 0.05);
    border: 1px solid rgba(52, 152, 219, 0.1);
    position: relative;
}

.checkbox-option:hover {
    background-color: rgba(52, 152, 219, 0.1);
    border-color: rgba(52, 152, 219, 0.3);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(52, 152, 219, 0.15);
}

.checkbox-option input {
    margin-right: 1rem;
    width: 18px;
    height: 18px;
    cursor: pointer;
    accent-color: var(--secondary-color);
}

.checkbox-option::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    width: 4px;
    height: 100%;
    background-color: var(--secondary-color);
    border-radius: 8px 0 0 8px;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.checkbox-option input:checked {
    transform: scale(1.1);
}

.checkbox-option:has(input:checked) {
    background-color: rgba(52, 152, 219, 0.15);
    border-color: rgba(52, 152, 219, 0.4);
    box-shadow: 0 2px 8px rgba(52, 152, 219, 0.2);
    color: var(--secondary-color);
    font-weight: 600;
}

.checkbox-option:has(input:checked)::before {
    opacity: 1;
}

/* 为每个选项添加不同的颜色主题 */
.checkbox-option:nth-child(1) {
    border-left: 4px solid var(--success-color);
}

.checkbox-option:nth-child(2) {
    border-left: 4px solid var(--highlight-color);
}

.checkbox-option:nth-child(3) {
    border-left: 4px solid var(--expert-color);
}

.checkbox-option:nth-child(1):hover {
    background-color: rgba(39, 174, 96, 0.1);
    border-color: rgba(39, 174, 96, 0.3);
}

.checkbox-option:nth-child(2):hover {
    background-color: rgba(243, 156, 18, 0.1);
    border-color: rgba(243, 156, 18, 0.3);
}

.checkbox-option:nth-child(3):hover {
    background-color: rgba(155, 89, 182, 0.1);
    border-color: rgba(155, 89, 182, 0.3);
}

.checkbox-option:nth-child(1):has(input:checked) {
    background-color: rgba(39, 174, 96, 0.15);
    border-color: rgba(39, 174, 96, 0.4);
}

.checkbox-option:nth-child(2):has(input:checked) {
    background-color: rgba(243, 156, 18, 0.15);
    border-color: rgba(243, 156, 18, 0.4);
}

.checkbox-option:nth-child(3):has(input:checked) {
    background-color: rgba(155, 89, 182, 0.15);
    border-color: rgba(155, 89, 182, 0.4);
}

/* 复选框图标美化 */
.checkbox-option input {
    position: relative;
}

.checkbox-option input:checked::before {
    content: '✓';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: white;
    font-size: 12px;
    font-weight: bold;
}

/* 复选框内容布局 */
.checkbox-content {
    display: flex;
    align-items: flex-start;
    gap: 0.8rem;
    flex: 1;
}

.checkbox-icon {
    font-size: 1.2rem;
    width: 24px;
    text-align: center;
    margin-top: 0.2rem;
    color: var(--secondary-color);
}

.checkbox-option:nth-child(1) .checkbox-icon {
    color: var(--success-color);
}

.checkbox-option:nth-child(2) .checkbox-icon {
    color: var(--highlight-color);
}

.checkbox-option:nth-child(3) .checkbox-icon {
    color: var(--expert-color);
}

.checkbox-text {
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--text-color);
    display: block;
    margin-bottom: 0.2rem;
}

.checkbox-description {
    font-size: 0.8rem;
    color: #7f8c8d;
    display: block;
    line-height: 1.3;
}

.checkbox-option:has(input:checked) .checkbox-text {
    color: var(--secondary-color);
}

.checkbox-option:has(input:checked) .checkbox-description {
    color: var(--secondary-color);
    opacity: 0.8;
}

/* 响应式调整 */
@media (max-width: 768px) {
    .checkbox-content {
        flex-direction: column;
        gap: 0.4rem;
    }
    
    .checkbox-icon {
        align-self: flex-start;
    }
}

/* AI智能设置 - 紧凑版本 */
.compact-checkbox-group {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.compact-checkbox-option {
    display: flex;
    align-items: center;
    padding: 0.5rem 0.8rem;
    border-radius: 6px;
    transition: var(--transition);
    background-color: rgba(52, 152, 219, 0.05);
    border: 1px solid rgba(52, 152, 219, 0.1);
    cursor: pointer;
}

.compact-checkbox-option:hover {
    background-color: rgba(52, 152, 219, 0.1);
    border-color: rgba(52, 152, 219, 0.3);
    transform: translateY(-1px);
}

.compact-checkbox-option input {
    margin-right: 0.8rem;
    width: 16px;
    height: 16px;
    cursor: pointer;
    accent-color: var(--secondary-color);
}

.compact-checkbox-option:has(input:checked) {
    background-color: rgba(52, 152, 219, 0.15);
    border-color: rgba(52, 152, 219, 0.4);
    color: var(--secondary-color);
    font-weight: 600;
}

.compact-checkbox-text {
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text-color);
}

.compact-checkbox-option:has(input:checked) .compact-checkbox-text {
    color: var(--secondary-color);
}

/* 为每个紧凑选项添加不同的颜色主题 */
.compact-checkbox-option:nth-child(1) {
    border-left: 3px solid var(--success-color);
}

.compact-checkbox-option:nth-child(2) {
    border-left: 3px solid var(--highlight-color);
}

.compact-checkbox-option:nth-child(3) {
    border-left: 3px solid var(--expert-color);
}

.game-info {
    background-color: white;
    border-radius: 8px;
    box-shadow: var(--shadow);
    padding: 1.5rem;
    margin-bottom: 0.5rem;
}

.info-item {
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.8rem;
}

.info-label {
    font-weight: 600;
    color: var(--primary-color);
}

.info-value {
    color: var(--text-color);
}

.highlight {
    color: var(--highlight-color);
    font-weight: 700;
}

.status-message {
    padding: 1rem;
    border-radius: 6px;
    margin-top: 1rem;
    text-align: center;
    font-weight: 600;
    display: none;
    width: 100%;
}

.status-message1 {
    padding: 1rem;
    border-radius: 6px;
    margin-top: 1rem;
    text-align: center;
    font-weight: 600;
    display: none;
    width: 100%;
}

.status-success {
    background-color: rgba(39, 174, 96, 0.1);
    color: var(--success-color);
    display: block;
}

.status-warning {
    background-color: rgba(241, 196, 15, 0.1);
    color: #f1c40f;
    display: block;
}

.status-danger {
    background-color: rgba(231, 76, 60, 0.1);
    color: var(--accent-color);
    display: block;
}

.badge {
    display: inline-block;
    padding: 0.25rem 0.5rem;
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 600;
    margin-left: 0.5rem;
}

.badge-primary {
    background-color: var(--secondary-color);
    color: white;
}

.badge-dark {
    background-color: var(--dark-color);
    color: white;
}

.animate-fade {
    animation: fadeIn 0.5s ease-in-out;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

footer {
    background-color: var(--dark-color);
    color: white;
    text-align: center;
    padding: 1.5rem 0;
    margin-top: auto;
}

.footer-text {
    opacity: 0.8;
    font-size: 0.9rem;
}

@keyframes pieceDrop {
    0% { transform: scale(0.5); opacity: 0; }
    70% { transform: scale(1.1); opacity: 0.8; }
    100% { transform: scale(1); opacity: 1; }
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.ai-thinking {
    display: none !important;
}

.ai-thinking i {
    margin-right: 0.5rem;
    animation: spin 1.5s linear infinite;
}

.player-thinking {
    display: none !important;
}

.player-thinking i {
    margin-right: 0.5rem;
    animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
    0% { opacity: 0.5; transform: scale(1); }
    50% { opacity: 1; transform: scale(1.05); }
    100% { opacity: 0.5; transform: scale(1); }
}

.canvas-disabled {
    pointer-events: none;
    opacity: 0.7;
    cursor: not-allowed;
}

.canvas-enabled {
    pointer-events: auto;
    opacity: 1;
    cursor: pointer;
}

.thinking-progress {
    display: none !important;
}

.thinking-progress-bar {
    height: 100%;
    background-color: var(--secondary-color);
    width: 0%;
    transition: width 0.3s ease;
}

.piece-indicator {
    display: inline-block;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    margin-left: 8px;
    vertical-align: middle;
}

.black-piece {
    background: radial-gradient(circle at 30% 30%, #666, #000);
    box-shadow: inset 0 0 5px rgba(255, 255, 255, 0.3);
}

.white-piece {
    background: radial-gradient(circle at 30% 30%, #fff, #ccc);
    box-shadow: inset 0 0 5px rgba(0, 0, 0, 0.2);
    border: 1px solid #ddd;
}

.vct-detection {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0.5rem;
    background-color: rgba(155, 89, 182, 0.1);
    border-radius: 6px;
    margin-top: 1rem;
    color: var(--expert-color);
    font-weight: 600;
    display: none;
    width: 100%;
}

.vct-detection i {
    margin-right: 0.5rem;
    color: var(--expert-color);
}

.analysis-title {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--expert-color);
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
}

.analysis-title i {
    margin-right: 0.5rem;
}

.analysis-item {
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.3rem;
    font-size: 0.85rem;
}

.analysis-label {
    color: var(--text-color);
}

.analysis-value {
    color: var(--primary-color);
    font-weight: 600;
}

.modal-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    z-index: 1000;
    justify-content: center;
    align-items: center;
}

.modal-content {
    background-color: white;
    width: 90%;
    max-width: 800px;
    max-height: 80vh;
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    overflow: hidden;
    animation: modalFadeIn 0.3s ease-out;
}

@keyframes modalFadeIn {
    from { opacity: 0; transform: translateY(-20px); }
    to { opacity: 1; transform: translateY(0); }
}

.modal-header {
    background: linear-gradient(135deg, var(--primary-color), var(--dark-color));
    color: white;
    padding: 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h2 {
    margin: 0;
    font-size: 1.5rem;
}

.modal-close {
    background: none;
    border: none;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
    transition: transform 0.2s;
}

.modal-close:hover {
    transform: scale(1.2);
}

.modal-body {
    padding: 2rem;
    overflow-y: auto;
    max-height: 60vh;
}

.modal-body h3 {
    color: var(--primary-color);
    margin-top: 1.5rem;
    margin-bottom: 0.8rem;
    border-bottom: 2px solid var(--light-color);
    padding-bottom: 0.5rem;
}

.modal-body ul, .modal-body ol {
    margin-left: 1.5rem;
    margin-bottom: 1rem;
}

.modal-body li {
    margin-bottom: 0.5rem;
    line-height: 1.6;
}

.modal-body p {
    margin-bottom: 1rem;
    line-height: 1.6;
}

.modal-body strong {
    color: var(--primary-color);
}

.feature-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1rem;
    margin: 1.5rem 0;
}

.feature-item {
    background-color: rgba(52, 152, 219, 0.1);
    padding: 1rem;
    border-radius: 6px;
    border-left: 4px solid var(--secondary-color);
}

.feature-item h4 {
    margin-top: 0;
    color: var(--secondary-color);
    display: flex;
    align-items: center;
}

.feature-item h4 i {
    margin-right: 0.5rem;
}

.match-log-content {
    background-color: white;
    width: 90%;
    max-width: 900px;
    max-height: 80vh;
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    overflow: hidden;
    animation: modalFadeIn 0.3s ease-out;
}

.match-log-body {
    padding: 2rem;
    overflow-y: auto;
    max-height: 60vh;
}

.match-log-actions {
    display: flex;
    gap: 1rem;
    margin-top: 1.5rem;
    justify-content: center;
}

.match-log-table {
    width: 100%;
    border-collapse: collapse;
    margin: 1rem 0;
    font-size: 0.9rem;
}

.match-log-table th {
    background-color: var(--light-color);
    padding: 0.8rem;
    text-align: left;
    font-weight: 600;
    color: var(--primary-color);
    border-bottom: 2px solid var(--secondary-color);
}

.match-log-table td {
    padding: 0.8rem;
    border-bottom: 1px solid #eee;
}

.match-log-table tr:hover {
    background-color: rgba(52, 152, 219, 0.05);
}

.move-black {
    color: #2c3e50;
    font-weight: 600;
}

.move-white {
    color: #7f8c8d;
    font-weight: 600;
}

.move-ai {
    color: var(--accent-color);
    font-weight: 600;
}

.move-human {
    color: var(--success-color);
    font-weight: 600;
}

.log-info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
    padding: 1rem;
    background-color: rgba(52, 152, 219, 0.05);
    border-radius: 6px;
}

.log-info-item {
    display: flex;
    flex-direction: column;
}

.log-info-label {
    font-size: 0.85rem;
    color: var(--text-color);
    margin-bottom: 0.25rem;
}

.log-info-value {
    font-weight: 600;
    color: var(--primary-color);
}

.log-filter {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
    align-items: center;
    flex-wrap: wrap;
}

.log-filter select, .log-filter input {
    padding: 0.5rem 0.8rem;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 0.9rem;
}

.log-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
    margin-top: 1.5rem;
    padding: 1rem;
    background-color: rgba(39, 174, 96, 0.05);
    border-radius: 6px;
}

.stat-item {
    text-align: center;
    padding: 0.5rem;
}

.stat-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.stat-label {
    font-size: 0.85rem;
    color: var(--text-color);
    margin-top: 0.25rem;
}

.export-options {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    justify-content: center;
}

.export-option {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 0.5rem;
    border: 1px solid #ddd;
    border-radius: 6px;
    cursor: pointer;
    transition: var(--transition);
    min-width: 80px;
}

.export-option:hover {
    background-color: rgba(52, 152, 219, 0.1);
    transform: translateY(-2px);
}

.export-icon {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.export-label {
    font-size: 0.8rem;
    font-weight: 600;
}

.auto-save-notice {
    background-color: rgba(52, 152, 219, 0.1);
    padding: 0.5rem;
    border-radius: 4px;
    margin-top: 0.5rem;
    font-size: 0.85rem;
    display: none;
}

.log-search {
    margin-bottom: 1rem;
}

.log-search input {
    width: 100%;
    padding: 0.8rem;
    border: 1px solid #ddd;
    border-radius: 6px;
    font-size: 1rem;
}

.log-search input:focus {
    outline: none;
    border-color: var(--secondary-color);
    box-shadow: 0 0 0 2px rgba(52, 152, 219, 0.2);
}

.log-detail-content {
    background-color: white;
    width: 90%;
    max-width: 1000px;
    max-height: 90vh;
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    overflow: hidden;
    animation: modalFadeIn 0.3s ease-out;
}

.log-detail-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 2rem;
}

.log-moves-container {
    max-height: 400px;
    overflow-y: auto;
    border: 1px solid #eee;
    border-radius: 6px;
    padding: 1rem;
}

.log-move-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(60px, 1fr));
    gap: 0.5rem;
}

.log-move-item {
    padding: 0.5rem;
    text-align: center;
    border-radius: 4px;
    cursor: pointer;
    transition: var(--transition);
}

.log-move-item:hover {
    background-color: rgba(52, 152, 219, 0.1);
}

.log-move-explanation {
    margin-top: 4px;
    font-size: 0.85rem;
    color: #34495e;
}

.log-explain-wrap {
    gap: 6px;
}

.explain-badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 600;
}

.explain-attack .explain-badge {
    background-color: rgba(231, 76, 60, 0.1);
    color: #e74c3c;
}

.explain-defense .explain-badge {
    background-color: rgba(52, 152, 219, 0.1);
    color: #3498db;
}

.explain-balanced .explain-badge {
    background-color: rgba(39, 174, 96, 0.1);
    color: #27ae60;
}

.log-move-number {
    font-size: 0.8rem;
    font-weight: 600;
}

.log-move-coord {
    font-size: 0.7rem;
    opacity: 0.8;
}

.import-options {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    justify-content: center;
    margin: 1.5rem 0;
}

.import-option {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 1rem;
    border: 2px solid #ddd;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    min-width: 100px;
}

.import-option:hover {
    background-color: rgba(52, 152, 219, 0.1);
    border-color: #3498db;
    transform: translateY(-2px);
}

.import-icon {
    font-size: 2rem;
    margin-bottom: 0.5rem;
    color: #3498db;
}

.import-label {
    font-weight: 600;
    color: #2c3e50;
}

#file-upload-area:hover {
    border-color: #3498db;
    background-color: rgba(52, 152, 219, 0.05);
}

@media (max-width: 1200px) {
    .container {
        grid-template-columns: 1fr 1fr;
        grid-template-rows: auto auto;
    }
    .game-board {
        grid-column: 1 / span 2;
        grid-row: 1;
        margin-bottom: 2rem;
    }
    .left-controls {
        grid-column: 1;
        grid-row: 2;
    }
    .right-controls {
        grid-column: 2;
        grid-row: 2;
    }
}

@media (max-width: 768px) {
    .container {
        grid-template-columns: 1fr;
        grid-template-rows: auto auto auto;
    }
    .game-board {
        grid-column: 1;
        grid-row: 1;
    }
    .left-controls {
        grid-column: 1;
        grid-row: 2;
    }
    .right-controls {
        grid-column: 1;
        grid-row: 3;
    }
    #board-container, canvas {
        width: 100%;
        height: auto;
        max-width: 800px;
    }
    .modal-content {
        width: 95%;
        max-height: 90vh;
    }
    .modal-body {
        padding: 1.5rem;
    }
    .feature-list {
        grid-template-columns: 1fr;
    }
    .log-detail-grid {
        grid-template-columns: 1fr;
    }
    .log-filter {
        flex-direction: column;
        align-items: stretch;
    }
}