:root {
    --bg-gradient-1: #a8edea;
    --bg-gradient-2: #fed6e3;
    --glass-bg: rgba(255, 255, 255, 0.25);
    --glass-border: rgba(255, 255, 255, 0.4);
    --glass-shadow: rgba(0, 0, 0, 0.1);
    --text-primary: #2d3436;
    --text-secondary: #636e72;
    --accent-color: #0984e3;
    --accent-glow: rgba(9, 132, 227, 0.3);
    --success-color: #00b894;
    --error-color: #d63031;
    --water-light: rgba(116, 185, 255, 0.8);
    --water-medium: rgba(9, 132, 227, 0.85);
    --water-dark: rgba(0, 82, 147, 0.95);
}

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

html, body {
    width: 100%;
    min-height: 100%;
    overflow-x: hidden;
}

body {
    font-family: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    background: linear-gradient(135deg, var(--bg-gradient-1) 0%, var(--bg-gradient-2) 100%);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    color: var(--text-primary);
}

#app {
    width: 100%;
    max-width: 500px;
    min-height: 100vh;
    padding: 16px;
    position: relative;
}

.screen {
    display: none;
    flex-direction: column;
    width: 100%;
    animation: fadeIn 0.3s ease-out;
}

.screen.active {
    display: flex;
}

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

.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    box-shadow: 0 8px 32px var(--glass-shadow);
    padding: 20px;
    width: 100%;
}

.title-card {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
    margin-bottom: 16px;
}

.title-content {
    flex: 1;
    text-align: left;
}

.game-title {
    font-size: 2.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent-color), #74b9ff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 4px;
}

.subtitle {
    font-size: 0.9rem;
    color: var(--text-secondary);
    letter-spacing: 2px;
}

.qr-code-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-left: 20px;
}

.qr-code {
    width: 80px;
    height: 80px;
    border-radius: 10px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.qr-hint {
    font-size: 0.7rem;
    color: var(--text-secondary);
    margin-top: 6px;
}

.stats-card {
    margin-bottom: 12px;
}

.stats-card h2 {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 12px;
    text-align: center;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 10px 8px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 10px;
}

.stat-label {
    font-size: 0.65rem;
    color: var(--text-secondary);
    margin-bottom: 2px;
    text-align: center;
}

.stat-value {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--accent-color);
}

.difficulty-card {
    margin-bottom: 16px;
}

.difficulty-card h2 {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 12px;
    text-align: center;
}

.difficulty-buttons {
    display: flex;
    gap: 8px;
}

.difficulty-btn {
    flex: 1;
    padding: 12px 6px;
    background: rgba(255, 255, 255, 0.2);
    border: 2px solid transparent;
    border-radius: 14px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
}

.difficulty-btn:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
}

.difficulty-btn.active {
    border-color: var(--accent-color);
    background: rgba(9, 132, 227, 0.15);
}

.diff-name {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
}

.diff-info {
    font-size: 0.65rem;
    color: var(--text-secondary);
}

.primary-btn {
    width: 100%;
    padding: 14px 32px;
    font-size: 1rem;
    font-weight: 600;
    color: white;
    background: linear-gradient(135deg, var(--accent-color), #74b9ff);
    border: none;
    border-radius: 14px;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px var(--accent-glow);
}

.primary-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px var(--accent-glow);
}

.primary-btn:active {
    transform: translateY(0);
}

.secondary-btn {
    width: 100%;
    padding: 12px 32px;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--accent-color);
    background: rgba(255, 255, 255, 0.3);
    border: 2px solid var(--accent-color);
    border-radius: 14px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.secondary-btn:hover {
    background: rgba(9, 132, 227, 0.1);
}

.sound-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-top: 12px;
}

.icon-btn {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    border: none;
    cursor: pointer;
    font-size: 1.1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.icon-btn:hover {
    background: rgba(255, 255, 255, 0.5);
    transform: scale(1.05);
}

.sound-label {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

#game-screen {
    min-height: 100vh;
    justify-content: flex-start;
}

.game-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 14px;
    margin-bottom: 12px;
    position: relative;
    z-index: 10;
}

.header-left, .header-right {
    flex: 1;
}

.header-center {
    flex: 2;
    text-align: center;
}

.header-right {
    text-align: right;
}

.score-display, .moves-display {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.score-label, .moves-label {
    font-size: 0.65rem;
    color: var(--text-secondary);
}

.score-value {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--accent-color);
}

.moves-value {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-primary);
}

.game-canvas-container {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
    flex: 1;
    position: relative;
}

#game-canvas {
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.2);
    touch-action: none;
    max-width: 100%;
}

.chain-display {
    position: absolute;
    top: 10px;
    left: 50%;
    transform: translateX(-50%);
    padding: 8px 20px;
    background: linear-gradient(135deg, var(--accent-color), #74b9ff);
    border-radius: 20px;
    animation: chainPulse 0.5s ease-out;
    z-index: 10;
    box-shadow: 0 4px 15px rgba(9, 132, 227, 0.4);
}

@keyframes chainPulse {
    0% { transform: translateX(-50%) scale(0.8); opacity: 0; }
    50% { transform: translateX(-50%) scale(1.1); }
    100% { transform: translateX(-50%) scale(1); opacity: 1; }
}

.chain-text {
    color: white;
    font-weight: 600;
    font-size: 0.9rem;
}

.game-rules {
    background: rgba(255, 255, 255, 0.25);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: 12px;
    padding: 15px 20px;
    margin: 15px 10px;
    max-width: 360px;
    width: 100%;
}

.rules-title {
    font-size: 0.95rem;
    color: var(--text-primary);
    margin-bottom: 10px;
    font-weight: 600;
}

.rules-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.rules-list li {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 6px;
    padding-left: 18px;
    position: relative;
}

.rules-list li::before {
    content: "•";
    position: absolute;
    left: 0;
    color: var(--accent-color);
    font-weight: bold;
}

.rules-list li:last-child {
    margin-bottom: 0;
}

#result-screen {
    justify-content: center;
    min-height: 100vh;
}

.result-card {
    text-align: center;
    max-width: 350px;
    margin: 0 auto;
}

.result-title {
    font-size: 1.8rem;
    margin-bottom: 16px;
}

.result-title.victory {
    color: var(--success-color);
}

.result-title.defeat {
    color: var(--error-color);
}

.result-score {
    margin-bottom: 16px;
}

.result-score-label {
    display: block;
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: 4px;
}

.result-score-value {
    font-size: 2.2rem;
    font-weight: 700;
    color: var(--accent-color);
}

.result-breakdown {
    background: rgba(255, 255, 255, 0.2);
    border-radius: 10px;
    padding: 10px;
    margin-bottom: 16px;
}

.breakdown-item {
    display: flex;
    justify-content: space-between;
    padding: 4px 0;
    font-size: 0.8rem;
}

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

.breakdown-value {
    color: var(--text-primary);
    font-weight: 500;
}

.result-stats {
    display: flex;
    justify-content: space-around;
    margin-bottom: 20px;
}

.result-stats .stat-item {
    background: rgba(255, 255, 255, 0.2);
    padding: 8px 16px;
}

.result-buttons {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

@media (max-width: 380px) {
    #app {
        padding: 12px;
    }

    .title-card {
        padding: 14px;
    }

    .title-content {
        text-align: left;
        margin-bottom: 0;
    }

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

    .subtitle {
        font-size: 0.75rem;
    }

    .qr-code-container {
        margin-left: 12px;
    }

    .qr-code {
        width: 60px;
        height: 60px;
    }

    .qr-hint {
        font-size: 0.6rem;
    }

    .glass-card {
        padding: 12px;
    }

    .stats-grid {
        grid-template-columns: 1fr 1fr;
        gap: 6px;
    }

    .stat-item {
        padding: 8px 4px;
    }

    .difficulty-buttons {
        flex-direction: column;
    }
}

@media (orientation: landscape) and (max-height: 500px) {
    #app {
        max-width: 400px;
        padding: 10px;
    }

    .title-card {
        padding: 12px;
        margin-bottom: 8px;
    }

    .game-title {
        font-size: 1.8rem;
    }

    .stats-card, .difficulty-card {
        padding: 10px;
        margin-bottom: 8px;
    }

    .stats-grid {
        grid-template-columns: repeat(4, 1fr);
        gap: 4px;
    }

    .stat-item {
        padding: 6px 2px;
    }

    .difficulty-buttons {
        flex-direction: row;
    }

    .sound-toggle {
        margin-top: 8px;
    }
}

.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(5px);
    z-index: 1000;
    justify-content: center;
    align-items: center;
}

.modal.active {
    display: flex;
}

.modal-content {
    max-width: 340px;
    width: 90%;
    padding: 20px;
    animation: modalIn 0.3s ease-out;
}

@keyframes modalIn {
    from { transform: scale(0.9); opacity: 0; }
    to { transform: scale(1); opacity: 1; }
}

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

.modal-header h3 {
    font-size: 1.2rem;
    color: var(--text-primary);
}

.share-card-container {
    display: flex;
    justify-content: center;
    margin-bottom: 16px;
}

#share-canvas {
    border-radius: 12px;
    max-width: 100%;
}

.share-actions {
    display: flex;
    justify-content: center;
    margin-bottom: 8px;
}

.share-actions .primary-btn {
    max-width: 200px;
}

.share-tip-container {
    margin-top: 10px;
}

.share-tip {
    text-align: center;
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin: 5px 0;
    line-height: 1.5;
}

.name-input-content {
    text-align: center;
    padding: 30px 20px;
}

.name-input-tip {
    margin: 20px 0;
    color: var(--text-primary);
    font-size: 1rem;
}

.name-input {
    width: 100%;
    padding: 12px 16px;
    font-size: 1rem;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.5);
    color: var(--text-primary);
    text-align: center;
    margin-bottom: 20px;
}

.name-input:focus {
    outline: none;
    border-color: var(--accent-color);
    background: rgba(255, 255, 255, 0.8);
}

.name-input-buttons {
    display: flex;
    gap: 10px;
}

.name-input-buttons .primary-btn,
.name-input-buttons .secondary-btn {
    flex: 1;
}

.btn-group {
    display: flex;
    gap: 10px;
    width: 100%;
    margin-top: 10px;
}

.btn-group .secondary-btn {
    flex: 1;
}

.ranking-content {
    max-height: 80vh;
    overflow-y: auto;
}

.ranking-list {
    margin-top: 16px;
}

.ranking-item {
    display: flex;
    align-items: center;
    padding: 12px 16px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 10px;
    margin-bottom: 8px;
}

.rank-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    margin-right: 10px;
    object-fit: cover;
    flex-shrink: 0;
}

.ranking-item:first-child {
    background: linear-gradient(135deg, rgba(255, 215, 0, 0.3), rgba(255, 215, 0, 0.1));
    border: 2px solid #ffd700;
}

.ranking-item:nth-child(2) {
    background: linear-gradient(135deg, rgba(192, 192, 192, 0.3), rgba(192, 192, 192, 0.1));
    border: 2px solid #c0c0c0;
}

.ranking-item:nth-child(3) {
    background: linear-gradient(135deg, rgba(205, 127, 50, 0.3), rgba(205, 127, 50, 0.1));
    border: 2px solid #cd7f32;
}

.rank-number {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.2rem;
    border-radius: 50%;
    margin-right: 12px;
}

.ranking-item:first-child .rank-number {
    background: #ffd700;
    color: #fff;
}

.ranking-item:nth-child(2) .rank-number {
    background: #c0c0c0;
    color: #fff;
}

.ranking-item:nth-child(3) .rank-number {
    background: #cd7f32;
    color: #fff;
}

.ranking-item:not(:first-child):not(:nth-child(2)):not(:nth-child(3)) .rank-number {
    background: rgba(255, 255, 255, 0.3);
    color: var(--text-secondary);
}

.rank-info {
    flex: 1;
}

.rank-name-row {
    display: flex;
    align-items: center;
    gap: 8px;
}

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

.rank-difficulty {
    font-size: 0.65rem;
    padding: 2px 8px;
    border-radius: 10px;
    font-weight: 500;
}

.rank-difficulty.difficulty-easy {
    background: rgba(0, 198, 107, 0.2);
    color: #00c66b;
}

.rank-difficulty.difficulty-normal {
    background: rgba(9, 132, 227, 0.2);
    color: #0984e3;
}

.rank-difficulty.difficulty-hard {
    background: rgba(239, 68, 68, 0.2);
    color: #ef4444;
}

.rank-date {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.rank-score {
    font-weight: 700;
    font-size: 1.3rem;
    color: var(--accent-color);
}

.loading-tip, .empty-tip {
    text-align: center;
    color: var(--text-secondary);
    padding: 30px 0;
}

.ranking-item.current-player {
    background: linear-gradient(135deg, rgba(9, 132, 227, 0.2), rgba(9, 132, 227, 0.1));
    border: 2px solid #0984e3;
    box-shadow: 0 0 10px rgba(9, 132, 227, 0.3);
}

.ranking-item.current-player .rank-name {
    color: #0984e3;
}

.ranking-ellipsis {
    text-align: center;
    color: var(--text-secondary);
    padding: 10px 0;
    font-size: 0.9rem;
}

.wechat-blocker {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--bg-gradient-1), var(--bg-gradient-2));
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    padding: 20px;
    box-sizing: border-box;
}

.wechat-blocker-content {
    text-align: center;
    padding: 40px 30px;
    max-width: 320px;
    width: 100%;
}

.wechat-blocker-content h2 {
    font-size: 1.5rem;
    color: var(--text-primary);
    margin-bottom: 10px;
}

.wechat-blocker-content p {
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.blocker-qrcode {
    width: 180px;
    height: 180px;
    border-radius: 12px;
    margin-bottom: 15px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
}

.qrcode-hint {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 5px;
}

.qrcode-hint.small {
    font-size: 0.75rem;
    color: #999;
}

.name-input-container {
    margin-bottom: 16px;
}

.name-input-label {
    display: block;
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.name-input {
    width: 100%;
    padding: 10px 14px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.2);
    font-size: 1rem;
    color: var(--text-primary);
    outline: none;
}

.name-input:focus {
    border-color: var(--accent-color);
}