/**
 * Wordle游戏特定样式
 * 基于InstantGames设计系统
 */

/* ===== 游戏特定变量 ===== */
:root {
    /* Wordle颜色 */
    --wordle-correct: #6aaa64;
    --wordle-present: #c9b458;
    --wordle-absent: #787c7e;
    --wordle-tile-bg: var(--surface-color);
    --wordle-tile-border: #d3d3d3;
    --wordle-tile-filled: #878a8c;
    --wordle-key-bg: #d3d3d3;
    --wordle-key-text: var(--text-primary);
    --wordle-tile-size: 62px;
}

/* 暗黑主题适配 */
[data-theme="dark"] {
    --wordle-tile-border: #3a3a3c;
    --wordle-tile-filled: #565758;
    --wordle-key-bg: #818384;
    --wordle-key-text: var(--text-primary);
}

/* ===== Wordle容器样式 ===== */
.wordle-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-xl);
    margin: var(--space-lg) 0;
    width: 100%;
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
}

/* ===== 游戏板样式 ===== */
.game-board {
    display: grid;
    grid-template-rows: repeat(6, var(--wordle-tile-size));
    gap: var(--space-xs);
    padding: var(--space-md);
}

.board-row {
    display: grid;
    grid-template-columns: repeat(5, var(--wordle-tile-size));
    gap: var(--space-xs);
}

.tile {
    width: var(--wordle-tile-size);
    height: var(--wordle-tile-size);
    border: 2px solid var(--wordle-tile-border);
    background-color: var(--wordle-tile-bg);
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: var(--font-size-xl);
    font-weight: 700;
    text-transform: uppercase;
    color: var(--text-primary);
    transition: all var(--transition-base);
    border-radius: var(--radius-sm);
    user-select: none;
}

.tile.filled {
    border-color: var(--wordle-tile-filled);
    animation: tileInput 0.1s ease-in-out;
}

.tile.correct {
    background-color: var(--wordle-correct);
    border-color: var(--wordle-correct);
    color: white;
}

.tile.present {
    background-color: var(--wordle-present);
    border-color: var(--wordle-present);
    color: white;
}

.tile.absent {
    background-color: var(--wordle-absent);
    border-color: var(--wordle-absent);
    color: white;
}

/* ===== 动画效果 ===== */
@keyframes tileInput {
    0% { transform: scale(1); }
    50% { transform: scale(1.1); }
    100% { transform: scale(1); }
}

.tile.flip {
    animation: tileFlip 0.6s ease-in-out forwards;
}

@keyframes tileFlip {
    0% { transform: rotateX(0); }
    50% { 
        transform: rotateX(90deg);
        background-color: var(--wordle-tile-bg);
        border-color: var(--wordle-tile-border);
        color: var(--text-primary);
    }
    100% { transform: rotateX(0); }
}

.tile.shake {
    animation: tileShake 0.5s ease-in-out;
}

@keyframes tileShake {
    0%, 100% { transform: translateX(0); }
    10%, 30%, 50%, 70%, 90% { transform: translateX(-8px); }
    20%, 40%, 60%, 80% { transform: translateX(8px); }
}

.tile.bounce {
    animation: tileBounce 0.5s ease-in-out;
}

@keyframes tileBounce {
    0%, 20% { transform: translateY(0); }
    40% { transform: translateY(-30px); }
    50% { transform: translateY(5px); }
    60% { transform: translateY(-15px); }
    80% { transform: translateY(2px); }
    100% { transform: translateY(0); }
}

/* ===== 虚拟键盘样式 ===== */
.keyboard {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    width: 100%;
    max-width: 484px;
}

.keyboard-row {
    display: flex;
    justify-content: center;
    gap: var(--space-xs);
}

.key {
    min-width: 43px;
    height: 58px;
    background-color: var(--wordle-key-bg);
    color: var(--wordle-key-text);
    border: none;
    border-radius: var(--radius-sm);
    font-size: var(--font-size-sm);
    font-weight: 700;
    text-transform: uppercase;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    user-select: none;
    touch-action: manipulation;
}

.key:hover {
    background-color: #bbb;
    transform: translateY(-1px);
}

.key:active {
    transform: translateY(0);
    background-color: #aaa;
}

.key.key-wide {
    min-width: 65px;
    font-size: var(--font-size-xs);
}

.key.correct {
    background-color: var(--wordle-correct);
    color: white;
}

.key.present {
    background-color: var(--wordle-present);
    color: white;
}

.key.absent {
    background-color: var(--wordle-absent);
    color: white;
}

.key.correct:hover {
    background-color: #5a9a5a;
}

.key.present:hover {
    background-color: #b8a548;
}

.key.absent:hover {
    background-color: #6e726e;
}

/* ===== 帮助模态框样式 ===== */
.help-content {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.help-section {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.help-section h4 {
    color: var(--primary-color);
    font-size: var(--font-size-lg);
    margin: 0;
}

.help-section p {
    margin: 0;
    line-height: 1.6;
    color: var(--text-secondary);
}

.help-section ul {
    margin: 0;
    padding-left: var(--space-lg);
    line-height: 1.6;
    color: var(--text-secondary);
}

.help-section li {
    margin-bottom: var(--space-sm);
}

.color-examples {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    margin-top: var(--space-md);
}

.color-example {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.example-tile {
    width: 40px;
    height: 40px;
    border: 2px solid transparent;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: var(--font-size-lg);
    font-weight: 700;
    text-transform: uppercase;
    color: white;
    border-radius: var(--radius-sm);
}

.example-tile.correct {
    background-color: var(--wordle-correct);
    border-color: var(--wordle-correct);
}

.example-tile.present {
    background-color: var(--wordle-present);
    border-color: var(--wordle-present);
}

.example-tile.absent {
    background-color: var(--wordle-absent);
    border-color: var(--wordle-absent);
}

/* ===== 统计模态框样式 ===== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
}

.stats-grid .stat-item {
    text-align: center;
    padding: var(--space-md);
    background-color: rgba(76, 175, 80, 0.05);
    border-radius: var(--radius-md);
    border: 1px solid rgba(76, 175, 80, 0.2);
}

.guess-distribution {
    margin-top: var(--space-lg);
}

.guess-distribution h4 {
    margin: 0 0 var(--space-md) 0;
    color: var(--text-primary);
    font-size: var(--font-size-lg);
}

.distribution-chart {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.distribution-bar {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.distribution-label {
    width: 20px;
    text-align: center;
    font-weight: 600;
    color: var(--text-primary);
}

.distribution-fill {
    height: 20px;
    background-color: var(--wordle-absent);
    border-radius: var(--radius-sm);
    min-width: 7%;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    padding-right: var(--space-xs);
    color: white;
    font-size: var(--font-size-xs);
    font-weight: 600;
    transition: all var(--transition-base);
}

.distribution-fill.current {
    background-color: var(--wordle-correct);
}

/* ===== 完成统计样式 ===== */
.completion-stats {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
}

.stat-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-sm) 0;
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
}

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

.stat-row span:first-child {
    font-weight: 600;
    color: var(--text-secondary);
}

.stat-row span:last-child {
    font-weight: 700;
    color: var(--text-primary);
    font-family: 'Courier New', monospace;
}

/* ===== 游戏信息面板样式 ===== */
.game-info {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
}

.info-section {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-lg);
}

.game-stats {
    display: flex;
    gap: var(--space-xl);
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-xs);
}

.stat-label {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    font-weight: 600;
}

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

.game-controls {
    display: flex;
    gap: var(--space-sm);
    flex-wrap: wrap;
    justify-content: center;
}

/* ===== 加载屏幕样式 ===== */
.loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--bg-color);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    opacity: 1;
    visibility: visible;
    transition: all var(--transition-base);
}

.loading-screen.hidden {
    opacity: 0;
    visibility: hidden;
}

.loading-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-lg);
}

.loading-spinner {
    width: 50px;
    height: 50px;
    border: 4px solid rgba(76, 175, 80, 0.2);
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.loading-text {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--text-primary);
}

/* ===== 响应式设计 ===== */
@media (max-width: 768px) {
    :root {
        --wordle-tile-size: 56px;
    }
    
    .wordle-container {
        gap: var(--space-lg);
        padding: 0 var(--space-sm);
    }
    
    .game-board {
        padding: var(--space-sm);
    }
    
    .keyboard {
        max-width: 100%;
    }
    
    .key {
        min-width: 32px;
        height: 48px;
        font-size: var(--font-size-xs);
    }
    
    .key.key-wide {
        min-width: 48px;
    }
    
    .info-section {
        flex-direction: column;
        gap: var(--space-md);
    }
    
    .game-stats {
        gap: var(--space-lg);
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .color-examples {
        gap: var(--space-sm);
    }
    
    .color-example {
        gap: var(--space-sm);
    }
    
    .example-tile {
        width: 32px;
        height: 32px;
        font-size: var(--font-size-base);
    }
}

@media (max-width: 480px) {
    :root {
        --wordle-tile-size: 48px;
    }
    
    .tile {
        font-size: var(--font-size-lg);
    }
    
    .key {
        min-width: 28px;
        height: 42px;
    }
    
    .key.key-wide {
        min-width: 42px;
        font-size: 10px;
    }
    
    .game-controls {
        grid-template-columns: 1fr;
        display: grid;
    }
    
    .help-section {
        gap: var(--space-sm);
    }
    
    .color-examples {
        gap: var(--space-xs);
    }
}

/* ===== 无障碍支持 ===== */
@media (prefers-reduced-motion: reduce) {
    .tile,
    .key {
        transition: none;
    }
    
    .tile.flip,
    .tile.shake,
    .tile.bounce {
        animation: none;
    }
    
    .loading-spinner {
        animation: none;
    }
}

/* ===== 高对比度模式 ===== */
@media (prefers-contrast: high) {
    .tile {
        border-width: 3px;
    }
    
    .key {
        border: 2px solid var(--text-primary);
    }
    
    .tile.correct,
    .tile.present,
    .tile.absent {
        border-width: 3px;
    }
}

/* ===== 新功能样式 ===== */

/* 模式选择模态框 */
.mode-grid, .difficulty-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-md);
    margin: var(--space-md) 0;
}

.mode-card, .difficulty-card {
    border: 2px solid rgba(76, 175, 80, 0.2);
    border-radius: var(--radius-md);
    padding: var(--space-md);
    cursor: pointer;
    transition: all var(--transition-base);
    background: var(--surface-color);
}

.mode-card:hover, .difficulty-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.mode-card.active, .difficulty-card.active {
    border-color: var(--primary-color);
    background: rgba(76, 175, 80, 0.1);
}

.mode-icon, .difficulty-icon {
    font-size: 2rem;
    margin-bottom: var(--space-sm);
}

.mode-info h5, .difficulty-info h5 {
    margin: 0 0 var(--space-xs) 0;
    color: var(--text-primary);
    font-size: var(--font-size-lg);
}

.mode-info p, .difficulty-info p {
    margin: 0 0 var(--space-sm) 0;
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    line-height: 1.4;
}

.mode-stats {
    display: flex;
    gap: var(--space-md);
    font-size: var(--font-size-xs);
    color: var(--text-tertiary);
}

.difficulty-multiplier {
    font-weight: bold;
    color: var(--primary-color);
    font-size: var(--font-size-lg);
}

.modal-actions {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    margin-top: var(--space-lg);
}

/* 道具系统样式 */
.power-up-bar {
    margin-top: var(--space-sm);
    padding: var(--space-xs) var(--space-sm);
    background: rgba(76, 175, 80, 0.05);
    border-radius: var(--radius-md);
    border: 1px solid rgba(76, 175, 80, 0.2);
}

/* 强制重置所有可能影响的样式 */
.power-up-bar *, .power-up-grid *, .power-up-btn * {
    box-sizing: border-box !important;
}

.power-up-bar h4 {
    margin: 0 0 6px 0;
    color: var(--text-primary);
    font-size: var(--font-size-sm);
    text-align: center;
    font-weight: 600;
}

.power-up-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-xs);
    max-width: 200px !important;
    margin: 0 auto;
}

.power-up-bar .power-up-btn,
.power-up-grid .power-up-btn,
button.power-up-btn {
    position: relative !important;
    aspect-ratio: 1 !important;
    border: 1px solid rgba(76, 175, 80, 0.3) !important;
    border-radius: var(--radius-sm) !important;
    background: var(--surface-color) !important;
    cursor: pointer !important;
    transition: all var(--transition-fast) !important;
    display: flex !important;
    flex-direction: column !important;
    align-items: center !important;
    justify-content: center !important;
    padding: 4px !important;
    margin: 0 !important;
    min-height: 35px !important;
    max-height: 35px !important;
    width: 35px !important;
    height: 35px !important;
    box-sizing: border-box !important;
    font-size: 12px !important;
}

.power-up-bar .power-up-btn:hover:not(.disabled) {
    border-color: var(--primary-color);
    transform: translateY(-1px);
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.power-up-bar .power-up-btn.disabled {
    opacity: 0.5;
    cursor: not-allowed;
    filter: grayscale(1);
}

.power-up-bar .power-up-icon {
    font-size: 0.9rem !important;
    margin-bottom: 1px;
    line-height: 1;
}

.power-up-bar .power-up-count {
    position: absolute;
    top: -2px;
    right: -2px;
    background: var(--primary-color);
    color: white;
    border-radius: 50%;
    width: 14px !important;
    height: 14px !important;
    font-size: 0.6rem !important;
    font-weight: bold;
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 14px;
    line-height: 1;
}

/* 计时器样式 */
.timer-display {
    font-size: var(--font-size-xl);
    font-weight: bold;
    color: var(--primary-color);
    text-align: center;
    padding: var(--space-sm);
    background: rgba(76, 175, 80, 0.1);
    border-radius: var(--radius-md);
    border: 2px solid rgba(76, 175, 80, 0.3);
    margin: var(--space-md) 0;
    font-family: 'Courier New', monospace;
}

/* 特殊瓦片样式 */
.tile.hint-tile {
    border-color: #4caf50 !important;
    animation: hintGlow 0.5s ease-in-out;
}

.tile.reveal-tile {
    border-color: #2196f3 !important;
    animation: revealGlow 0.5s ease-in-out;
}

@keyframes hintGlow {
    0%, 100% { box-shadow: 0 0 0 rgba(76, 175, 80, 0.5); }
    50% { box-shadow: 0 0 10px rgba(76, 175, 80, 0.8); }
}

@keyframes revealGlow {
    0%, 100% { box-shadow: 0 0 0 rgba(33, 150, 243, 0.5); }
    50% { box-shadow: 0 0 10px rgba(33, 150, 243, 0.8); }
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

/* 响应式适配 */
@media (max-width: 768px) {
    .mode-grid, .difficulty-grid {
        grid-template-columns: 1fr;
    }
    
    .power-up-grid {
        grid-template-columns: repeat(4, 1fr);
        max-width: 180px;
    }
    
    .power-up-btn {
        min-height: 32px;
        max-height: 35px;
        width: 32px;
        padding: 3px;
    }
    
    .power-up-icon {
        font-size: 0.8rem;
    }
    
    .timer-display {
        font-size: var(--font-size-lg);
    }
}

@media (max-width: 480px) {
    .modal-actions {
        flex-direction: column;
    }
    
    .power-up-grid {
        grid-template-columns: repeat(4, 1fr);
        max-width: 160px;
        gap: 3px;
    }
    
    .power-up-btn {
        min-height: 28px;
        max-height: 30px;
        width: 28px;
        padding: 2px;
    }
    
    .power-up-icon {
        font-size: 0.7rem;
        margin-bottom: 0;
    }
    
    .power-up-count {
        width: 12px;
        height: 12px;
        font-size: 0.55rem;
        top: -1px;
        right: -1px;
    }
    
    .mode-card, .difficulty-card {
        padding: var(--space-sm);
    }
    
    .power-up-bar {
        padding: 4px var(--space-xs);
        margin-top: 6px;
    }
    
    .power-up-bar h4 {
        font-size: var(--font-size-xs);
        margin-bottom: 3px;
    }
}

/* ===== 新主题系统样式 ===== */

/* 主题选择器 */
.theme-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
}

.theme-option {
    border: 2px solid rgba(76, 175, 80, 0.2);
    border-radius: var(--radius-md);
    padding: var(--space-md);
    cursor: pointer;
    transition: all var(--transition-base);
    background: var(--surface-color);
    display: flex;
    flex-direction: column;
    align-items: center;
}

.theme-option:hover {
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.theme-option.active {
    border-color: var(--primary-color);
    background: rgba(76, 175, 80, 0.1);
    box-shadow: 0 0 15px rgba(76, 175, 80, 0.3);
}

.theme-preview {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-bottom: var(--space-md);
}

.theme-icon {
    font-size: 2rem;
    margin-bottom: var(--space-sm);
}

.theme-colors {
    display: flex;
    gap: var(--space-xs);
}

.color-dot {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    border: 2px solid rgba(255,255,255,0.8);
}

.theme-info {
    text-align: center;
}

.theme-name {
    font-weight: bold;
    color: var(--text-primary);
    margin-bottom: var(--space-xs);
}

.theme-description {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    line-height: 1.4;
}

/* 主题预览区域 */
.theme-preview-area {
    margin-top: var(--space-lg);
    padding: var(--space-md);
    background: rgba(76, 175, 80, 0.05);
    border-radius: var(--radius-md);
    border: 1px solid rgba(76, 175, 80, 0.2);
}

.theme-preview-area h4 {
    margin: 0 0 var(--space-md) 0;
    text-align: center;
    color: var(--text-primary);
}

.preview-tiles {
    display: flex;
    gap: var(--space-xs);
    justify-content: center;
}

.preview-tile {
    width: 40px;
    height: 40px;
    border: 2px solid var(--wordle-tile-border);
    background-color: var(--wordle-tile-bg);
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: var(--font-size-lg);
    font-weight: 700;
    text-transform: uppercase;
    color: var(--text-primary);
    border-radius: var(--radius-sm);
    transition: all var(--transition-base);
}

.preview-tile.correct {
    background-color: var(--wordle-correct);
    border-color: var(--wordle-correct);
    color: white;
}

.preview-tile.present {
    background-color: var(--wordle-present);
    border-color: var(--wordle-present);
    color: white;
}

.preview-tile.absent {
    background-color: var(--wordle-absent);
    border-color: var(--wordle-absent);
    color: white;
}

/* 3D动画增强 */
.tile {
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    will-change: transform;
}

.tile:hover {
    transform: translateY(-1px);
}

/* 粒子效果兼容 */
#particleCanvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1000;
}

/* 性能优化的动画 */
@media (prefers-reduced-motion: reduce) {
    .tile,
    .key,
    .theme-option {
        transition: none !important;
        animation: none !important;
    }
    
    .tile:hover {
        transform: none;
    }
}

/* 高性能模式 */
.performance-mode .tile {
    transition: background-color 0.2s ease, border-color 0.2s ease;
    will-change: auto;
}

.performance-mode .tile:hover {
    transform: none;
}

/* 主题特效容器 */
.theme-particles {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: -1;
}

/* 响应式主题选择器 */
@media (max-width: 768px) {
    .theme-options {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
        gap: var(--space-sm);
    }
    
    .theme-option {
        padding: var(--space-sm);
    }
    
    .theme-icon {
        font-size: 1.5rem;
    }
    
    .preview-tiles {
        gap: var(--space-xs);
    }
    
    .preview-tile {
        width: 32px;
        height: 32px;
        font-size: var(--font-size-base);
    }
}

@media (max-width: 480px) {
    .theme-options {
        grid-template-columns: 1fr;
    }
    
    .theme-preview-area {
        padding: var(--space-sm);
    }
    
    .preview-tiles {
        flex-wrap: wrap;
        justify-content: center;
    }
}

/* ===== 连击和成就特效样式 ===== */

/* 连击动画 */
@keyframes comboFloat {
    0% {
        transform: translateY(0) scale(0.5);
        opacity: 0;
    }
    20% {
        transform: translateY(-10px) scale(1.2);
        opacity: 1;
    }
    80% {
        transform: translateY(-30px) scale(1);
        opacity: 1;
    }
    100% {
        transform: translateY(-50px) scale(0.8);
        opacity: 0;
    }
}

/* 成就通知动画 */
@keyframes achievementSlide {
    0% {
        transform: translateX(100%);
        opacity: 0;
    }
    10% {
        transform: translateX(0);
        opacity: 1;
    }
    90% {
        transform: translateX(0);
        opacity: 1;
    }
    100% {
        transform: translateX(100%);
        opacity: 0;
    }
}

.achievement-notification {
    animation: achievementSlide 3s ease-out forwards;
}

.achievement-icon {
    font-size: 2rem;
    flex-shrink: 0;
}

.achievement-text {
    flex: 1;
}

.achievement-title {
    font-weight: bold;
    font-size: 1rem;
    margin-bottom: 0.25rem;
}

.achievement-description {
    font-size: 0.875rem;
    opacity: 0.9;
}

/* 连击粒子爆炸 */
.combo-burst-particle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: #FFD700;
    border-radius: 50%;
    pointer-events: none;
    animation: comboBurstParticle 0.8s ease-out forwards;
}

@keyframes comboBurstParticle {
    0% {
        transform: scale(0) rotate(0deg);
        opacity: 1;
    }
    50% {
        transform: scale(1.5) rotate(180deg);
        opacity: 1;
    }
    100% {
        transform: scale(0.5) rotate(360deg);
        opacity: 0;
    }
}

/* 成就爆炸粒子 */
.achievement-burst-particle {
    position: absolute;
    width: 6px;
    height: 6px;
    background: linear-gradient(45deg, #FFD700, #FFA500);
    border-radius: 50%;
    pointer-events: none;
    animation: achievementBurstParticle 1.2s ease-out forwards;
}

@keyframes achievementBurstParticle {
    0% {
        transform: scale(0) rotate(0deg);
        opacity: 1;
        box-shadow: 0 0 10px #FFD700;
    }
    30% {
        transform: scale(2) rotate(120deg);
        opacity: 1;
        box-shadow: 0 0 20px #FFD700;
    }
    100% {
        transform: scale(0.3) rotate(360deg);
        opacity: 0;
        box-shadow: 0 0 5px #FFD700;
    }
}

/* 输入闪烁粒子 */
.input-sparkle-particle {
    position: absolute;
    width: 3px;
    height: 3px;
    background: #4CAF50;
    border-radius: 50%;
    pointer-events: none;
    animation: inputSparkle 0.6s ease-out forwards;
}

@keyframes inputSparkle {
    0% {
        transform: scale(0);
        opacity: 1;
        box-shadow: 0 0 5px #4CAF50;
    }
    50% {
        transform: scale(1.5);
        opacity: 1;
        box-shadow: 0 0 15px #4CAF50;
    }
    100% {
        transform: scale(0.2);
        opacity: 0;
        box-shadow: 0 0 3px #4CAF50;
    }
}

/* 增强的瓦片交互 */
.tile {
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.tile::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    transition: left 0.5s ease;
}

.tile.filled::before {
    left: 100%;
}

/* 连击发光效果 */
.tile.combo-glow {
    animation: comboGlow 0.8s ease-in-out;
}

@keyframes comboGlow {
    0%, 100% {
        box-shadow: 0 0 5px rgba(255, 215, 0, 0.5);
    }
    50% {
        box-shadow: 0 0 25px rgba(255, 215, 0, 0.9);
    }
}

/* 成就高亮 */
.achievement-highlight {
    animation: achievementHighlight 1s ease-in-out;
}

@keyframes achievementHighlight {
    0%, 100% {
        background-color: inherit;
    }
    50% {
        background-color: rgba(255, 215, 0, 0.3);
        box-shadow: 0 0 20px rgba(255, 215, 0, 0.6);
    }
}

/* 完美行特效 */
.perfect-row-tile {
    animation: perfectRowCelebration 1s ease-in-out;
}

@keyframes perfectRowCelebration {
    0%, 100% {
        transform: scale(1) rotate(0deg);
    }
    25% {
        transform: scale(1.1) rotate(5deg);
    }
    50% {
        transform: scale(1.2) rotate(0deg);
    }
    75% {
        transform: scale(1.1) rotate(-5deg);
    }
}

/* 响应式调整 */
@media (max-width: 768px) {
    .achievement-notification {
        top: 10px;
        right: 10px;
        max-width: 250px;
        padding: 0.75rem;
    }
    
    .achievement-icon {
        font-size: 1.5rem;
    }
    
    .achievement-title {
        font-size: 0.875rem;
    }
    
    .achievement-description {
        font-size: 0.75rem;
    }
}

@media (max-width: 480px) {
    .achievement-notification {
        left: 10px;
        right: 10px;
        max-width: none;
    }
}

/* 性能优化 */
@media (prefers-reduced-motion: reduce) {
    .combo-burst-particle,
    .achievement-burst-particle,
    .input-sparkle-particle,
    .tile.combo-glow,
    .achievement-highlight,
    .perfect-row-tile {
        animation: none !important;
    }
    
    .achievement-notification {
        animation: none !important;
        opacity: 1;
        transform: none;
    }
}

/* ===== 性能设置模态框样式 ===== */

.performance-info h4,
.performance-settings h4,
.performance-debug h4 {
    margin: 0 0 var(--space-md) 0;
    color: var(--text-primary);
    font-size: var(--font-size-lg);
}

.performance-metrics {
    background: rgba(76, 175, 80, 0.05);
    border: 1px solid rgba(76, 175, 80, 0.2);
    border-radius: var(--radius-md);
    padding: var(--space-md);
    margin-bottom: var(--space-lg);
}

.metric-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-xs) 0;
    border-bottom: 1px solid rgba(76, 175, 80, 0.1);
}

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

.metric-row span:first-child {
    font-weight: 600;
    color: var(--text-secondary);
}

.metric-value {
    font-weight: bold;
    color: var(--primary-color);
    font-family: 'Courier New', monospace;
}

.performance-options {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
}

.performance-option {
    border: 2px solid rgba(76, 175, 80, 0.2);
    border-radius: var(--radius-md);
    padding: var(--space-md);
    cursor: pointer;
    transition: all var(--transition-base);
    background: var(--surface-color);
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.performance-option:hover {
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.performance-option.active {
    border-color: var(--primary-color);
    background: rgba(76, 175, 80, 0.1);
    box-shadow: 0 0 15px rgba(76, 175, 80, 0.3);
}

.performance-icon {
    font-size: 2rem;
    flex-shrink: 0;
}

.performance-info {
    flex: 1;
}

.performance-info h5 {
    margin: 0 0 var(--space-xs) 0;
    color: var(--text-primary);
    font-size: var(--font-size-lg);
}

.performance-info p {
    margin: 0;
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    line-height: 1.4;
}

.performance-debug {
    margin-bottom: var(--space-lg);
    padding-top: var(--space-lg);
    border-top: 1px solid rgba(76, 175, 80, 0.2);
}

.performance-debug button {
    margin-right: var(--space-sm);
    margin-bottom: var(--space-sm);
}

/* 性能面板样式（由JS创建） */
#performance-panel {
    background: rgba(0, 0, 0, 0.9) !important;
    color: #00ff00 !important;
    border: 1px solid #00ff00 !important;
    box-shadow: 0 0 10px rgba(0, 255, 0, 0.3) !important;
}

/* 响应式调整 */
@media (max-width: 768px) {
    .performance-options {
        gap: var(--space-sm);
    }
    
    .performance-option {
        padding: var(--space-sm);
        flex-direction: column;
        text-align: center;
        gap: var(--space-sm);
    }
    
    .performance-icon {
        font-size: 1.5rem;
    }
    
    .performance-debug button {
        width: 100%;
        margin-right: 0;
    }
}

@media (max-width: 480px) {
    .performance-metrics {
        padding: var(--space-sm);
    }
    
    .metric-row {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-xs);
    }
    
    .modal-actions {
        flex-direction: column;
    }
}

/* ===== 分享系统样式 ===== */

.share-preview-container {
    margin-bottom: var(--space-lg);
}

.share-card-preview {
    background: var(--surface-color);
    border: 2px solid rgba(76, 175, 80, 0.2);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    margin-bottom: var(--space-md);
}

.share-card {
    text-align: center;
}

.share-header {
    margin-bottom: var(--space-md);
}

.share-emoji {
    font-size: 2rem;
    margin-bottom: var(--space-sm);
    display: block;
}

.share-title {
    margin: 0;
    color: var(--text-primary);
    font-size: var(--font-size-lg);
}

.share-content {
    margin-bottom: var(--space-md);
}

.share-text {
    margin: 0 0 var(--space-md) 0;
    color: var(--text-secondary);
    font-size: var(--font-size-base);
    line-height: 1.5;
}

.share-grid {
    font-family: monospace;
    font-size: 1.2rem;
    line-height: 1.2;
    margin: var(--space-md) 0;
    background: rgba(76, 175, 80, 0.05);
    padding: var(--space-md);
    border-radius: var(--radius-md);
}

.grid-row {
    margin-bottom: 2px;
}

.share-footer {
    padding-top: var(--space-md);
    border-top: 1px solid rgba(76, 175, 80, 0.2);
}

.share-info {
    color: var(--text-tertiary);
    font-size: var(--font-size-sm);
}

.share-actions {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.quick-actions {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-md);
}

.share-action-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-md);
    position: relative;
    transition: all var(--transition-base);
}

.share-action-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.share-action-btn .btn-icon {
    font-size: 1.5rem;
}

.share-action-btn .btn-text {
    font-size: var(--font-size-sm);
    font-weight: 600;
}

.share-action-btn .btn-status {
    position: absolute;
    top: -5px;
    right: -5px;
    background: var(--primary-color);
    color: white;
    border-radius: 50%;
    width: 20px;
    height: 20px;
    font-size: var(--font-size-xs);
    display: none;
    align-items: center;
    justify-content: center;
}

.share-action-btn.success .btn-status {
    display: flex;
}

.social-platforms h4 {
    margin: 0 0 var(--space-md) 0;
    color: var(--text-primary);
    font-size: var(--font-size-lg);
    text-align: center;
}

.platform-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-md);
}

.platform-btn {
    border: 2px solid rgba(76, 175, 80, 0.2);
    border-radius: var(--radius-md);
    padding: var(--space-md);
    background: var(--surface-color);
    cursor: pointer;
    transition: all var(--transition-base);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-xs);
}

.platform-btn:hover {
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

.platform-icon {
    font-size: 1.5rem;
}

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

.share-stats {
    padding: var(--space-md);
    background: rgba(76, 175, 80, 0.05);
    border-radius: var(--radius-md);
    border: 1px solid rgba(76, 175, 80, 0.2);
}

.stats-summary {
    text-align: center;
}

.stats-summary h5 {
    margin: 0 0 var(--space-sm) 0;
    color: var(--text-primary);
    font-size: var(--font-size-base);
}

.stats-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-xs);
}

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

.stats-label {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

.stats-value {
    color: var(--primary-color);
    font-weight: bold;
    font-size: var(--font-size-sm);
}

/* 复制成功动画 */
@keyframes copySuccess {
    0% { transform: scale(1); }
    50% { transform: scale(1.1); }
    100% { transform: scale(1); }
}

.share-action-btn.success {
    animation: copySuccess 0.3s ease-out;
}

.share-action-btn.success .btn-status::after {
    content: '✓';
}

/* 响应式设计 */
@media (max-width: 768px) {
    .quick-actions {
        grid-template-columns: 1fr;
    }
    
    .platform-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .share-card-preview {
        padding: var(--space-md);
    }
    
    .share-actions {
        gap: var(--space-md);
    }
}

@media (max-width: 480px) {
    .platform-grid {
        grid-template-columns: 1fr;
    }
    
    .share-grid {
        font-size: 1rem;
        padding: var(--space-sm);
    }
    
    .share-action-btn {
        padding: var(--space-sm);
    }
    
    .platform-btn {
        padding: var(--space-sm);
        flex-direction: row;
        justify-content: center;
        gap: var(--space-sm);
    }
    
    .platform-icon {
        font-size: 1.2rem;
    }
}

/* 打印时隐藏分享相关元素 */
@media print {
    .share-actions,
    .share-stats {
        display: none;
    }
}

/* ==================== 增强统计系统样式 ==================== */

/* 统计导航标签 */
.stats-nav {
    display: flex;
    background: var(--background-color);
    border-radius: var(--radius-md);
    padding: var(--space-xs);
    margin-bottom: var(--space-lg);
    border: 1px solid var(--border-color);
}

.stats-nav-item {
    flex: 1;
    padding: var(--space-sm) var(--space-md);
    text-align: center;
    background: transparent;
    border: none;
    border-radius: var(--radius-sm);
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s ease;
}

.stats-nav-item:hover {
    background: var(--surface-color);
}

.stats-nav-item.active {
    background: var(--primary-color);
    color: white;
}

/* 统计卡片网格 */
.stats-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
}

.stats-card {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--space-md);
    text-align: center;
    transition: all 0.2s ease;
}

.stats-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.stats-card-value {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: var(--space-xs);
}

.stats-card-label {
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.stats-card-trend {
    font-size: var(--font-size-xs);
    margin-top: var(--space-xs);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-xs);
}

.trend-up {
    color: var(--success-color);
}

.trend-down {
    color: var(--error-color);
}

.trend-stable {
    color: var(--text-secondary);
}

/* 图表容器 */
.chart-container {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--space-lg);
    margin-bottom: var(--space-lg);
}

.chart-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--space-md);
    color: var(--text-primary);
}

.chart-canvas {
    max-height: 300px;
    width: 100%;
}

/* 猜测分布图表 */
.guess-distribution-chart {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    margin-top: var(--space-md);
}

.guess-bar {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.guess-number {
    width: 20px;
    font-weight: 600;
    color: var(--text-primary);
}

.guess-bar-fill {
    height: 24px;
    background: var(--primary-color);
    border-radius: var(--radius-sm);
    min-width: 2px;
    transition: width 0.5s ease;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    padding-right: var(--space-xs);
}

.guess-bar-count {
    font-size: var(--font-size-xs);
    color: white;
    font-weight: 600;
}

/* 进度趋势图表 */
.progress-chart {
    height: 200px;
    position: relative;
    margin-top: var(--space-md);
}

.progress-line {
    stroke: var(--primary-color);
    stroke-width: 2;
    fill: none;
}

.progress-area {
    fill: var(--primary-color);
    opacity: 0.1;
}

.progress-point {
    fill: var(--primary-color);
    r: 3;
}

.progress-point:hover {
    r: 5;
    fill: var(--accent-color);
}

/* 成就系统 */
.achievements-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-md);
    margin-top: var(--space-md);
}

.achievement-card {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--space-md);
    text-align: center;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.achievement-card.unlocked {
    border-color: var(--success-color);
    background: linear-gradient(135deg, var(--surface-color) 0%, rgba(76, 175, 80, 0.1) 100%);
}

.achievement-card.unlocked::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 0;
    height: 0;
    border-left: 20px solid transparent;
    border-top: 20px solid var(--success-color);
}

.achievement-card.unlocked::after {
    content: '✓';
    position: absolute;
    top: 2px;
    right: 2px;
    color: white;
    font-size: 12px;
    font-weight: bold;
}

.achievement-icon {
    font-size: 2rem;
    margin-bottom: var(--space-sm);
    filter: grayscale(1);
    transition: filter 0.3s ease;
}

.achievement-card.unlocked .achievement-icon {
    filter: none;
}

.achievement-title {
    font-size: var(--font-size-base);
    font-weight: 600;
    margin-bottom: var(--space-xs);
    color: var(--text-primary);
}

.achievement-description {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    line-height: 1.4;
}

.achievement-date {
    font-size: var(--font-size-xs);
    color: var(--text-tertiary);
    margin-top: var(--space-sm);
    font-style: italic;
}

/* 字母使用频率 */
.letter-usage-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: var(--space-sm);
    margin-top: var(--space-md);
}

.letter-usage-item {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: var(--space-sm);
    text-align: center;
}

.letter-usage-letter {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--space-xs);
}

.letter-usage-count {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

/* 时间分析图表 */
.time-analysis-chart {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    margin-top: var(--space-md);
}

.time-bar {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.time-label {
    width: 80px;
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.time-bar-fill {
    height: 20px;
    background: linear-gradient(90deg, var(--accent-color), var(--primary-color));
    border-radius: var(--radius-sm);
    min-width: 2px;
    transition: width 0.5s ease;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    padding-right: var(--space-xs);
}

.time-bar-percentage {
    font-size: var(--font-size-xs);
    color: white;
    font-weight: 600;
}

/* 统计操作按钮 */
.stats-actions {
    display: flex;
    gap: var(--space-sm);
    margin-top: var(--space-lg);
    justify-content: center;
    flex-wrap: wrap;
}

.stats-action-btn {
    padding: var(--space-sm) var(--space-md);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--surface-color);
    color: var(--text-primary);
    font-size: var(--font-size-sm);
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

.stats-action-btn:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

/* 成就通知动画 */
.achievement-notification {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: linear-gradient(135deg, var(--success-color), var(--accent-color));
    color: white;
    padding: var(--space-lg);
    border-radius: var(--radius-lg);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
    z-index: 1000;
    text-align: center;
    animation: achievementPop 0.6s ease-out;
}

@keyframes achievementPop {
    0% {
        transform: translate(-50%, -50%) scale(0.5);
        opacity: 0;
    }
    50% {
        transform: translate(-50%, -50%) scale(1.1);
    }
    100% {
        transform: translate(-50%, -50%) scale(1);
        opacity: 1;
    }
}

.achievement-notification-icon {
    font-size: 3rem;
    margin-bottom: var(--space-sm);
}

.achievement-notification-title {
    font-size: var(--font-size-lg);
    font-weight: 700;
    margin-bottom: var(--space-xs);
}

.achievement-notification-description {
    font-size: var(--font-size-sm);
    opacity: 0.9;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .stats-cards {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .achievements-grid {
        grid-template-columns: 1fr;
    }
    
    .letter-usage-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .stats-nav {
        flex-direction: column;
    }
    
    .stats-actions {
        justify-content: stretch;
    }
    
    .stats-action-btn {
        flex: 1;
        justify-content: center;
    }
}

/* ==================== 排行榜系统样式 ==================== */

/* 排行榜模态框 */
.leaderboard-modal .modal-content {
    max-width: 900px;
    width: 95%;
}

/* 排行榜导航 */
.leaderboard-nav {
    display: flex;
    background: var(--background-color);
    border-radius: var(--radius-md);
    padding: var(--space-xs);
    margin-bottom: var(--space-lg);
    border: 1px solid var(--border-color);
    overflow-x: auto;
}

.leaderboard-nav-item {
    flex: 1;
    min-width: 120px;
    padding: var(--space-sm) var(--space-md);
    text-align: center;
    background: transparent;
    border: none;
    border-radius: var(--radius-sm);
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s ease;
    white-space: nowrap;
}

.leaderboard-nav-item:hover {
    background: var(--surface-color);
}

.leaderboard-nav-item.active {
    background: var(--primary-color);
    color: white;
}

.leaderboard-nav-icon {
    display: block;
    font-size: 1.2rem;
    margin-bottom: var(--space-xs);
}

/* 分类选择器 */
.category-selector {
    display: flex;
    gap: var(--space-sm);
    margin-bottom: var(--space-lg);
    flex-wrap: wrap;
}

.category-btn {
    padding: var(--space-xs) var(--space-sm);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--surface-color);
    color: var(--text-primary);
    font-size: var(--font-size-sm);
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

.category-btn:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.category-btn.active {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

/* 排行榜列表 */
.leaderboard-list {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.leaderboard-item {
    display: flex;
    align-items: center;
    padding: var(--space-md);
    border-bottom: 1px solid var(--border-color);
    transition: all 0.2s ease;
    position: relative;
}

.leaderboard-item:last-child {
    border-bottom: none;
}

.leaderboard-item:hover {
    background: rgba(var(--primary-color-rgb), 0.05);
}

.leaderboard-item.current-player {
    background: linear-gradient(90deg, rgba(var(--primary-color-rgb), 0.1), transparent);
    border-left: 3px solid var(--primary-color);
}

/* 排名 */
.rank {
    width: 40px;
    text-align: center;
    font-weight: 700;
    font-size: var(--font-size-lg);
    color: var(--text-primary);
}

.rank.top-1 {
    color: #FFD700; /* 金色 */
}

.rank.top-2 {
    color: #C0C0C0; /* 银色 */
}

.rank.top-3 {
    color: #CD7F32; /* 铜色 */
}

/* 玩家信息 */
.player-info {
    display: flex;
    align-items: center;
    flex: 1;
    min-width: 0;
}

.player-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--primary-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    margin-right: var(--space-md);
}

.player-details {
    flex: 1;
    min-width: 0;
}

.player-name {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-xs);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.player-meta {
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.player-region {
    padding: 2px 6px;
    background: rgba(var(--primary-color-rgb), 0.1);
    border-radius: var(--radius-sm);
    font-size: 10px;
    font-weight: 500;
}

/* 统计数值 */
.player-value {
    font-weight: 700;
    font-size: var(--font-size-lg);
    color: var(--primary-color);
    text-align: right;
    min-width: 60px;
}

/* 玩家档案卡片 */
.player-profile-card {
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    color: white;
    padding: var(--space-lg);
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-lg);
    text-align: center;
}

.profile-avatar {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    margin: 0 auto var(--space-md);
}

.profile-name {
    font-size: var(--font-size-xl);
    font-weight: 700;
    margin-bottom: var(--space-xs);
}

.profile-title {
    font-size: var(--font-size-sm);
    opacity: 0.9;
    margin-bottom: var(--space-sm);
}

.profile-level {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    background: rgba(255, 255, 255, 0.2);
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    font-weight: 600;
}

/* 搜索和好友功能 */
.social-actions {
    display: flex;
    gap: var(--space-sm);
    margin-bottom: var(--space-lg);
    flex-wrap: wrap;
}

.search-container {
    flex: 1;
    min-width: 200px;
    position: relative;
}

.search-input {
    width: 100%;
    padding: var(--space-sm) var(--space-md);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--surface-color);
    color: var(--text-primary);
    font-size: var(--font-size-sm);
}

.search-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(var(--primary-color-rgb), 0.2);
}

.search-results {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    max-height: 200px;
    overflow-y: auto;
    z-index: 10;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    margin-top: var(--space-xs);
}

.search-result-item {
    display: flex;
    align-items: center;
    padding: var(--space-sm) var(--space-md);
    cursor: pointer;
    transition: background-color 0.2s ease;
}

.search-result-item:hover {
    background: rgba(var(--primary-color-rgb), 0.05);
}

.search-result-item:not(:last-child) {
    border-bottom: 1px solid var(--border-color);
}

/* 好友按钮 */
.friend-btn {
    padding: var(--space-sm) var(--space-md);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--surface-color);
    color: var(--text-primary);
    font-size: var(--font-size-sm);
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

.friend-btn:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

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

/* 比较模态框 */
.comparison-container {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: var(--space-lg);
    align-items: center;
}

.comparison-player {
    text-align: center;
}

.comparison-vs {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--text-secondary);
}

.comparison-stats {
    margin-top: var(--space-lg);
}

.comparison-stat {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-sm) 0;
    border-bottom: 1px solid var(--border-color);
}

.comparison-stat:last-child {
    border-bottom: none;
}

.stat-name {
    font-weight: 500;
    color: var(--text-primary);
}

.stat-values {
    display: flex;
    gap: var(--space-lg);
    align-items: center;
}

.stat-value {
    font-weight: 600;
    min-width: 60px;
    text-align: center;
}

.stat-value.winner {
    color: var(--success-color);
}

.stat-value.loser {
    color: var(--text-secondary);
}

/* 排行榜操作按钮 */
.leaderboard-actions {
    display: flex;
    gap: var(--space-sm);
    margin-top: var(--space-lg);
    justify-content: center;
    flex-wrap: wrap;
}

.leaderboard-action-btn {
    padding: var(--space-sm) var(--space-md);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--surface-color);
    color: var(--text-primary);
    font-size: var(--font-size-sm);
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

.leaderboard-action-btn:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

/* 升级通知 */
.level-up-notification {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: linear-gradient(135deg, var(--accent-color), var(--primary-color));
    color: white;
    padding: var(--space-xl);
    border-radius: var(--radius-lg);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
    z-index: 1001;
    text-align: center;
    animation: levelUpPop 0.8s ease-out;
}

@keyframes levelUpPop {
    0% {
        transform: translate(-50%, -50%) scale(0.3) rotate(-10deg);
        opacity: 0;
    }
    50% {
        transform: translate(-50%, -50%) scale(1.1) rotate(5deg);
    }
    100% {
        transform: translate(-50%, -50%) scale(1) rotate(0deg);
        opacity: 1;
    }
}

.level-up-icon {
    font-size: 4rem;
    margin-bottom: var(--space-md);
    animation: levelUpBounce 1s infinite;
}

@keyframes levelUpBounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.level-up-title {
    font-size: var(--font-size-xl);
    font-weight: 700;
    margin-bottom: var(--space-sm);
}

.level-up-details {
    font-size: var(--font-size-base);
    opacity: 0.9;
    margin-bottom: var(--space-sm);
}

.level-up-subtitle {
    font-size: var(--font-size-sm);
    opacity: 0.8;
}

/* 空状态 */
.empty-state {
    text-align: center;
    padding: var(--space-xl);
    color: var(--text-secondary);
}

.empty-state-icon {
    font-size: 3rem;
    margin-bottom: var(--space-md);
    opacity: 0.5;
}

.empty-state-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--space-sm);
}

.empty-state-description {
    font-size: var(--font-size-sm);
    line-height: 1.5;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .leaderboard-nav {
        flex-direction: column;
    }
    
    .leaderboard-nav-item {
        flex: none;
        width: 100%;
    }
    
    .category-selector {
        justify-content: center;
    }
    
    .category-btn {
        flex: 1;
        justify-content: center;
    }
    
    .leaderboard-item {
        padding: var(--space-sm);
    }
    
    .player-meta {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-xs);
    }
    
    .comparison-container {
        grid-template-columns: 1fr;
        gap: var(--space-md);
    }
    
    .comparison-vs {
        order: -1;
    }
    
    .social-actions {
        flex-direction: column;
    }
    
    .search-container {
        min-width: auto;
    }
}

@media (max-width: 480px) {
    .leaderboard-modal .modal-content {
        width: 98%;
        margin: var(--space-sm);
    }
    
    .rank {
        width: 30px;
        font-size: var(--font-size-base);
    }
    
    .player-avatar {
        width: 32px;
        height: 32px;
        font-size: 1rem;
        margin-right: var(--space-sm);
    }
    
    .player-value {
        font-size: var(--font-size-base);
        min-width: 50px;
    }
    
    .profile-avatar {
        width: 60px;
        height: 60px;
        font-size: 2rem;
    }
}

/* ===== 打印样式 ===== */
@media print {
    .keyboard,
    .game-controls,
    .header-controls,
    .loading-screen,
    .power-up-bar,
    .timer-display,
    #particleCanvas,
    .theme-particles,
    .achievement-notification,
    .level-up-notification {
        display: none;
    }
    
    .game-board {
        break-inside: avoid;
    }
}

/* ===== 日历系统样式 ===== */
.calendar-modal .modal-content {
    max-width: 800px;
    max-height: 90vh;
    overflow-y: auto;
}

/* 每日挑战卡片 */
.daily-challenge-card {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-light) 100%);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    margin-bottom: var(--space-lg);
    color: white;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.daily-challenge-card::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
    animation: challengeGlow 3s ease-in-out infinite;
}

@keyframes challengeGlow {
    0%, 100% { opacity: 0.3; }
    50% { opacity: 0.7; }
}

.challenge-title {
    font-size: var(--font-size-xl);
    font-weight: 700;
    margin-bottom: var(--space-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
}

.challenge-word {
    font-size: var(--font-size-2xl);
    font-weight: 800;
    letter-spacing: 0.2em;
    margin: var(--space-md) 0;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

.challenge-hint {
    font-size: var(--font-size-base);
    opacity: 0.9;
    margin-bottom: var(--space-sm);
}

.challenge-difficulty {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    background: rgba(255,255,255,0.2);
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
}

.difficulty-stars {
    color: #FFD700;
}

/* 日历导航 */
.calendar-nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-lg);
    padding: var(--space-md);
    background: var(--surface-color);
    border-radius: var(--radius-md);
}

.calendar-nav-btn {
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--radius-sm);
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s ease;
    font-size: var(--font-size-lg);
}

.calendar-nav-btn:hover {
    background: var(--primary-dark);
    transform: scale(1.05);
}

.calendar-month-year {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--text-primary);
}

/* 日历网格 */
.calendar-grid {
    background: var(--surface-color);
    border-radius: var(--radius-md);
    overflow: hidden;
    margin-bottom: var(--space-lg);
}

.calendar-weekdays {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    background: var(--primary-color);
    color: white;
}

.weekday {
    padding: var(--space-sm);
    text-align: center;
    font-weight: 600;
    font-size: var(--font-size-sm);
}

.calendar-days {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 1px;
    background: var(--border-color);
}

.calendar-day {
    background: var(--background-color);
    aspect-ratio: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    position: relative;
    cursor: pointer;
    transition: all 0.2s ease;
    min-height: 60px;
}

.calendar-day:hover {
    background: var(--surface-hover);
}

.calendar-day.today {
    background: var(--primary-light);
    color: white;
    font-weight: 700;
}

.calendar-day.completed {
    background: var(--success-color);
    color: white;
}

.calendar-day.challenge-completed {
    background: var(--warning-color);
    color: white;
}

.calendar-day.perfect-day {
    background: linear-gradient(135deg, var(--success-color) 0%, var(--primary-color) 100%);
    color: white;
}

.day-number {
    font-size: var(--font-size-base);
    font-weight: 600;
    margin-bottom: var(--space-xs);
}

.day-indicators {
    display: flex;
    gap: 2px;
    position: absolute;
    bottom: 4px;
    left: 50%;
    transform: translateX(-50%);
}

.day-indicator {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: currentColor;
    opacity: 0.7;
}

.day-stats {
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
    position: absolute;
    top: 2px;
    right: 4px;
}

/* 连胜统计 */
.streak-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
}

.streak-stat-card {
    background: var(--surface-color);
    border-radius: var(--radius-md);
    padding: var(--space-md);
    text-align: center;
    border: 2px solid var(--border-color);
    transition: all 0.2s ease;
}

.streak-stat-card.current-streak {
    border-color: var(--primary-color);
    background: linear-gradient(135deg, var(--primary-light) 0%, var(--primary-color) 100%);
    color: white;
}

.streak-stat-card.longest-streak {
    border-color: var(--warning-color);
}

.streak-stat-card.perfect-streak {
    border-color: var(--success-color);
}

.streak-icon {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--space-sm);
}

.streak-value {
    font-size: var(--font-size-2xl);
    font-weight: 800;
    margin-bottom: var(--space-xs);
}

.streak-label {
    font-size: var(--font-size-sm);
    opacity: 0.8;
}

/* 成就徽章 */
.badge-showcase {
    margin-bottom: var(--space-lg);
}

.badge-showcase h4 {
    margin-bottom: var(--space-md);
    color: var(--text-primary);
    font-size: var(--font-size-lg);
}

.badge-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: var(--space-md);
}

.badge-item {
    background: var(--surface-color);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--space-md);
    text-align: center;
    transition: all 0.3s ease;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.badge-item.earned {
    border-color: var(--warning-color);
    background: linear-gradient(135deg, var(--warning-light) 0%, var(--warning-color) 100%);
    color: white;
    transform: scale(1.02);
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

.badge-item.earned::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.2) 0%, transparent 60%);
    animation: badgeShine 2s ease-in-out infinite;
}

@keyframes badgeShine {
    0%, 100% { opacity: 0; }
    50% { opacity: 1; }
}

.badge-item:not(.earned) {
    opacity: 0.5;
    filter: grayscale(50%);
}

.badge-icon {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--space-sm);
}

.badge-name {
    font-size: var(--font-size-sm);
    font-weight: 600;
    margin-bottom: var(--space-xs);
}

.badge-description {
    font-size: var(--font-size-xs);
    opacity: 0.8;
    line-height: 1.3;
}

/* 日历操作 */
.calendar-actions {
    display: flex;
    gap: var(--space-sm);
    flex-wrap: wrap;
    justify-content: center;
}

.calendar-action-btn {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--space-sm) var(--space-md);
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    cursor: pointer;
    transition: all 0.2s ease;
    font-size: var(--font-size-sm);
    color: var(--text-primary);
}

.calendar-action-btn:hover {
    background: var(--surface-hover);
    border-color: var(--primary-color);
    transform: translateY(-1px);
}

.calendar-action-btn.primary {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.calendar-action-btn.primary:hover {
    background: var(--primary-dark);
}

/* 徽章通知 */
.badge-notification {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 10000;
    background: linear-gradient(135deg, var(--warning-color) 0%, var(--warning-dark) 100%);
    color: white;
    border-radius: var(--radius-lg);
    padding: var(--space-md);
    box-shadow: 0 6px 20px rgba(0,0,0,0.2);
    animation: slideInRight 0.5s ease-out;
    max-width: 300px;
}

@keyframes slideInRight {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

.badge-notification-content {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.badge-notification .badge-icon {
    font-size: var(--font-size-3xl);
    margin: 0;
    flex-shrink: 0;
}

.badge-info {
    flex: 1;
}

.badge-notification .badge-name {
    font-size: var(--font-size-base);
    font-weight: 700;
    margin-bottom: var(--space-xs);
}

.badge-notification .badge-description {
    font-size: var(--font-size-sm);
    opacity: 0.9;
}

.badge-close {
    background: none;
    border: none;
    color: white;
    font-size: var(--font-size-lg);
    cursor: pointer;
    padding: var(--space-xs);
    line-height: 1;
    opacity: 0.8;
    transition: opacity 0.2s ease;
}

.badge-close:hover {
    opacity: 1;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .calendar-modal .modal-content {
        width: 95%;
        margin: var(--space-sm);
        max-height: 95vh;
    }
    
    .daily-challenge-card {
        padding: var(--space-md);
    }
    
    .challenge-title {
        font-size: var(--font-size-lg);
    }
    
    .challenge-word {
        font-size: var(--font-size-xl);
        letter-spacing: 0.1em;
    }
    
    .calendar-days {
        gap: 0;
    }
    
    .calendar-day {
        min-height: 50px;
    }
    
    .day-number {
        font-size: var(--font-size-sm);
    }
    
    .streak-stats {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .badge-grid {
        grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    }
    
    .calendar-actions {
        gap: var(--space-xs);
    }
    
    .calendar-action-btn {
        padding: var(--space-xs) var(--space-sm);
        font-size: var(--font-size-xs);
    }
    
    .badge-notification {
        top: 10px;
        right: 10px;
        left: 10px;
        max-width: none;
    }
}

@media (max-width: 480px) {
    .daily-challenge-card {
        padding: var(--space-sm);
    }
    
    .challenge-title {
        font-size: var(--font-size-base);
    }
    
    .challenge-word {
        font-size: var(--font-size-lg);
    }
    
    .calendar-month-year {
        font-size: var(--font-size-lg);
    }
    
    .calendar-nav-btn {
        width: 35px;
        height: 35px;
        font-size: var(--font-size-base);
    }
    
    .weekday {
        padding: var(--space-xs);
        font-size: var(--font-size-xs);
    }
    
    .calendar-day {
        min-height: 40px;
    }
    
    .day-number {
        font-size: var(--font-size-xs);
    }
    
    .streak-stats {
        grid-template-columns: 1fr;
    }
    
    .streak-value {
        font-size: var(--font-size-xl);
    }
    
    .badge-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* ===== 游戏控制按钮样式优化 ===== */
.game-controls {
    display: flex;
    gap: var(--space-md);
    flex-wrap: wrap;
    justify-content: center;
    margin-top: var(--space-lg);
}

.game-controls .btn {
    min-width: 120px;
    min-height: 48px;
    padding: var(--space-md) var(--space-lg);
    font-size: var(--font-size-base);
    font-weight: 600;
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
}

.game-controls .btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* 移动设备上的按钮优化 */
@media (max-width: 768px) {
    .game-controls {
        gap: var(--space-sm);
    }
    
    .game-controls .btn {
        min-width: 100px;
        min-height: 44px;
        padding: var(--space-sm) var(--space-md);
        font-size: var(--font-size-sm);
    }
}

@media (max-width: 480px) {
    .game-controls {
        flex-direction: column;
        align-items: center;
    }
    
    .game-controls .btn {
        width: 100%;
        max-width: 200px;
        min-height: 48px;
    }
}