/* 移除外链字体后，删除本地字体声明（未使用） */
:root {
    /* 马卡龙主题（默认） */
    --bg: linear-gradient(135deg, #ffeef8 0%, #e6f3ff 100%);
    --card-bg: rgba(255, 255, 255, 0.9);
    --primary: #ff6b9d;
    --secondary: #c44569;
    --accent: #f8b500;
    --text: #2d3436;
    --text-light: #636e72;
    --border: rgba(0, 0, 0, 0.1);
    --shadow: rgba(0, 0, 0, 0.1);
    --success: #00b894;
    --warning: #fdcb6e;
    --error: #e17055;
}

[data-theme="morandi"] {
    --bg: linear-gradient(135deg, #f5f3f0 0%, #e8e2db 100%);
    --card-bg: rgba(248, 245, 242, 0.95);
    --primary: #a8a8a8;
    --secondary: #7d7d7d;
    --accent: #d4a574;
    --text: #4a4a4a;
    --text-light: #8a8a8a;
}

[data-theme="geek"] {
    --bg: linear-gradient(135deg, #0f0f0f 0%, #1a1a1a 100%);
    --card-bg: rgba(30, 30, 30, 0.9);
    --primary: #00ff88;
    --secondary: #00cc6a;
    --accent: #ff006e;
    --text: #ffffff;
    --text-light: #b0b0b0;
    --border: rgba(255, 255, 255, 0.1);
    --shadow: rgba(0, 0, 0, 0.3);
}

[data-theme="high-contrast"] {
    --bg: #ffffff;
    --card-bg: #ffffff;
    --primary: #000000;
    --secondary: #333333;
    --accent: #ff0000;
    --text: #000000;
    --text-light: #666666;
    --border: #000000;
    --shadow: rgba(0, 0, 0, 0.2);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    background: var(--bg);
    min-height: 100vh;
    color: var(--text);
    overflow-x: hidden;
}

.container {
    display: flex;
    height: 100vh;
    position: relative;
}

/* 顶部栏 */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 60px;
    background: var(--card-bg);
    backdrop-filter: blur(10px);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 20px;
    box-shadow: 0 2px 10px var(--shadow);
    z-index: 1000;
}

.logo {
    font-size: 20px;
    font-weight: bold;
    color: var(--text);
    display: inline-flex;
    align-items: center;
}

.header-controls {
    display: flex;
    gap: 15px;
    align-items: center;
}

.voice-toggle {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 20px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.voice-toggle:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px var(--shadow);
}

.icon {
    display: inline-block;
    width: 1em;
    height: 1em;
    color: var(--text);
    stroke: currentColor;
    fill: none;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
}

/* 删除 .msr 基础类，页面未使用该字体图标 */

/* 实心彩色图标与色板 */
/* 删除 .msr 相关色板与变体，页面仅用原生 <svg> 图标着色 */

.theme-selector {
    display: flex;
    gap: 5px;
    padding: 5px;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 25px;
}

.theme-btn {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    border: 2px solid transparent;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.theme-btn.active {
    border-color: var(--primary);
    transform: scale(1.1);
}

.theme-btn .icon, .theme-btn .msr {
    width: 18px;
    height: 18px;
    color: #fff;
}

.logo .icon, .logo .msr {
    color: var(--primary);
}

/* 放大logo与语音开关的图标，保持一致尺寸 */
.logo .icon {
    width: 24px;
    height: 24px;
}
.voice-toggle .icon {
    width: 24px;
    height: 24px;
}

/* 左侧名单抽屉 */
.drawer {
    position: fixed;
    left: 0;
    top: 60px;
    bottom: 0;
    width: 300px;
    background: var(--card-bg);
    backdrop-filter: blur(10px);
    box-shadow: 2px 0 10px var(--shadow);
    transform: translateX(-100%);
    transition: transform 0.3s ease;
    z-index: 999;
    overflow-y: auto;
}

.drawer.open {
    transform: translateX(0);
}

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

.drawer-content {
    padding: 20px;
}

.student-input {
    width: 100%;
    min-height: 200px;
    padding: 10px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--card-bg);
    color: var(--text);
    resize: vertical;
}

.drawer-actions {
    display: flex;
    gap: 10px;
    margin-top: 15px;
    justify-content: center;
}

/* 右侧历史抽屉 */
.history {
    position: fixed;
    right: 0;
    top: 60px;
    bottom: 0;
    width: 350px;
    background: var(--card-bg);
    backdrop-filter: blur(10px);
    box-shadow: -2px 0 10px var(--shadow);
    transform: translateX(100%);
    transition: transform 0.3s ease;
    z-index: 999;
    overflow-y: auto;
}

.history.open {
    transform: translateX(0);
}

.history-item {
    padding: 15px;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.history-time {
    font-size: 12px;
    color: var(--text-light);
}

/* 主舞台 */
.main {
    flex: 1;
    margin: 60px 0 180px 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 20px;
    transition: all 0.3s ease;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 10;
    pointer-events: none;
}

.main .card {
    pointer-events: auto;
}

.card {
    background: transparent;
    backdrop-filter: none;
    border-radius: 20px;
    padding: 80px;
    text-align: center;
    box-shadow: none;
    max-width: 600px;
    width: 90%;
    position: relative;
    overflow: hidden;
    transform: scale(1.1);
}

/* 多名显示时缩小内边距，增大可用空间 */
.card.compact {
    padding: 40px 30px;
}
.card.compact-10 {
    padding: 30px 20px;
    max-width: 860px; /* 10人时放宽容器宽度 */
    width: 96%;
}

.card__name {
    font-size: 56px;
    font-weight: bold;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    margin-bottom: 30px;
    min-height: 70px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    word-wrap: break-word;
    word-break: break-all;
    line-height: 1.2;
    max-height: 200px;
    overflow: hidden;
    color: var(--text);
}

/* 多名称栅格显示，确保最多10个完整显示 */
.card__name.multi-names {
    display: grid;
    gap: 12px 16px;
    align-content: center;
    justify-items: center;
    max-height: none;
    overflow: visible;
    padding: 10px 0;
}
.card__name.multi-names .name-item {
    display: inline-block;
    line-height: 1.1;
    white-space: normal;
    overflow-wrap: anywhere;
    word-break: break-word;
    max-width: 100%;
    text-align: center;
}

/* 基于数量的网格与字号调节（1-10） */
.card__name.names-1 { grid-template-columns: 1fr; font-size: 80px; }
.card__name.names-2 { grid-template-columns: 1fr 1fr; font-size: 64px; }
.card__name.names-3 { grid-template-columns: 1fr 1fr 1fr; font-size: 48px; }
.card__name.names-4 { grid-template-columns: 1fr 1fr; font-size: 44px; }
.card__name.names-5 { grid-template-columns: 1fr 1fr 1fr; font-size: 40px; }
.card__name.names-6 { grid-template-columns: 1fr 1fr 1fr; font-size: 36px; }
.card__name.names-7 { grid-template-columns: 1fr 1fr 1fr 1fr; font-size: 32px; }
.card__name.names-8 { grid-template-columns: 1fr 1fr 1fr 1fr; font-size: 30px; }
.card__name.names-9 { grid-template-columns: repeat(3, 1fr); font-size: 28px; }
.card__name.names-10 { grid-template-columns: repeat(5, 1fr); font-size: 30px; }
.card__name.names-10 .name-item { letter-spacing: 0.5px; }
/* 10 名时增加适度间距，确保不拥挤且不换行 */
.card__name.multi-names.names-10 { gap: 10px 14px; }

@media (max-width: 768px) {
    .card__name.names-1 { font-size: 42px; }
    .card__name.names-2 { font-size: 34px; }
    .card__name.names-3 { font-size: 28px; }
    .card__name.names-4 { font-size: 26px; }
    .card__name.names-5 { font-size: 24px; }
    .card__name.names-6 { font-size: 22px; }
    .card__name.names-7 { font-size: 20px; }
    .card__name.names-8 { font-size: 19px; }
    .card__name.names-9 { font-size: 18px; }
    .card__name.names-10 { font-size: 18px; }
    .card__name.multi-names { gap: 10px 14px; }
    .card__name.multi-names.names-10 { gap: 6px 10px; }
}

.card__name.long-text {
    font-size: 36px;
}

.card__name.very-long-text {
    font-size: 24px;
}

.card__name.extra-long-text {
    font-size: 18px;
}

.progress-bar {
    height: 4px;
    background: var(--border);
    border-radius: 2px;
    overflow: hidden;
    margin: 20px 0;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    transition: width 0.3s ease;
}

.timer-display {
    font-size: 100px;
    font-weight: bold;
    color: var(--primary);
    margin: 20px 0;
    text-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
    letter-spacing: 2px;
}

/* 控制面板 */
.controls {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--card-bg);
    backdrop-filter: blur(10px);
    padding: 20px;
    box-shadow: 0 -2px 10px var(--shadow);
    z-index: 1000;
}

.control-row {
    display: flex;
    gap: 15px;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 15px;
}

.mode-tabs {
    display: flex;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 25px;
    padding: 5px;
    gap: 8px;
    overflow-x: auto;
}

.mode-tab {
    padding: 10px 20px;
    border: none;
    background: none;
    color: var(--text);
    cursor: pointer;
    border-radius: 20px;
    transition: all 0.3s ease;
    flex: 0 0 auto;
    white-space: nowrap;
}

.mode-tab.active {
    background: var(--primary);
    color: white;
}

.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 25px;
    cursor: pointer;
    font-size: 16px;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

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

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

.btn-danger {
    background: #e53935;
    color: #fff;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px var(--shadow);
}

.slider-container {
    display: flex;
    align-items: center;
    gap: 10px;
    min-width: 200px;
}

.slider {
    flex: 1;
    height: 4px;
    background: var(--border);
    border-radius: 2px;
    outline: none;
    -webkit-appearance: none;
}

.slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 20px;
    height: 20px;
    background: var(--primary);
    border-radius: 50%;
    cursor: pointer;
}

/* 模式选项 */
.mode-options {
    position: relative;
    z-index: 999;
}

/* 移动端触摸优化 */
@media (max-width: 768px) {
    * {
        -webkit-tap-highlight-color: transparent;
        -webkit-touch-callout: none;
        -webkit-user-select: none;
        user-select: none;
    }
    
    body {
        -webkit-overflow-scrolling: touch;
        overscroll-behavior: contain;
    }
    
    .slider::-webkit-slider-thumb {
        width: 24px;
        height: 24px;
    }
    
    .btn, .mode-tab {
        min-height: 44px;
        touch-action: manipulation;
        -webkit-tap-highlight-color: rgba(0, 0, 0, 0.1);
    }
    
    .drawer-toggle {
        min-width: 44px;
        min-height: 44px;
        touch-action: manipulation;
        -webkit-tap-highlight-color: rgba(0, 0, 0, 0.1);
    }
    
    .voice-toggle, .theme-selector {
        min-height: 36px;
        touch-action: manipulation;
        -webkit-tap-highlight-color: rgba(0, 0, 0, 0.1);
    }
    
    .theme-btn {
        min-width: 36px;
        min-height: 36px;
        touch-action: manipulation;
        -webkit-tap-highlight-color: rgba(0, 0, 0, 0.1);
    }
    
    .card {
        -webkit-tap-highlight-color: rgba(0, 0, 0, 0.05);
    }
    
    .slider {
        touch-action: pan-x;
    }
    
    /* 移动端动画优化 */
    .card, .btn, .mode-tab {
        will-change: transform;
    }
    
    /* 防止页面缩放 */
    input, textarea, select {
        font-size: 16px !important;
    }
}

/* 弹幕效果 */
.barrage {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1001;
}

.barrage-item {
    position: absolute;
    background: var(--primary);
    color: white;
    padding: 15px 25px;
    border-radius: 25px;
    font-size: 18px;
    font-weight: bold;
    box-shadow: 0 4px 12px var(--shadow);
    animation: flyIn 0.8s ease-out;
}

@keyframes flyIn {
    from {
        transform: translateX(100vw) translateY(-50px);
        opacity: 0;
    }
    to {
        transform: translateX(calc(100vw - 200px)) translateY(0);
        opacity: 1;
    }
}

/* 3D 翻转卡片 - 性能优化版本 */
.card-3d {
    perspective: 1000px;
    /* 启用GPU加速 */
    transform: translateZ(0);
    will-change: transform;
}

.card-inner {
    position: relative;
    width: 100%;
    height: 200px;
    /* 优化过渡效果，使用GPU加速 */
    transition: transform 1.2s cubic-bezier(0.4, 0, 0.2, 1);
    transform-style: preserve-3d;
    /* 启用硬件加速 */
    transform: translateZ(0);
    will-change: transform;
}

.card-3d.flipping .card-inner {
    transform: rotateY(180deg) translateZ(0);
}

.card-face {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 36px;
    font-weight: bold;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    /* 启用GPU加速 */
    transform: translateZ(0);
    will-change: transform;
}

.card-back {
    transform: rotateY(180deg);
    background: transparent;
    color: var(--text);
}

/* 粒子背景 */
#particles-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1;
}

/* 抽屉切换按钮（玻璃态） */
.drawer-toggle {
    position: fixed;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    color: var(--text);
    border: 1px solid rgba(255, 255, 255, 0.3);
    cursor: pointer;
    z-index: 998;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 60px;
    height: auto;
    min-height: 80px;
    border-radius: 30px;
    box-shadow: 0 8px 24px rgba(0,0,0,0.12);
    padding: 12px 8px;
}

.drawer-toggle.left { left: 14px; }
.drawer-toggle.right { right: 14px; }

.drawer-toggle:hover {
    box-shadow: 0 12px 28px rgba(0,0,0,0.16);
    background: rgba(255, 255, 255, 0.9);
    transform: translateY(-50%) scale(1.05);
}
.drawer-toggle.left:hover { transform: translateY(-50%) translateX(2px) scale(1.05); }
.drawer-toggle.right:hover { transform: translateY(-50%) translateX(-2px) scale(1.05); }
.drawer-toggle:active { transform: translateY(-50%) scale(0.98); }

.drawer-toggle .icon { width: 28px; height: 28px; }
.drawer-toggle .msr { font-size: 28px; }

/* 按钮内容布局 */
.toggle-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 6px;
}

.toggle-text {
    font-size: 16px;
    font-weight: 500;
    writing-mode: vertical-rl;
    text-orientation: mixed;
    color: var(--text);
    line-height: 1.2;
}

.drawer-toggle:focus-visible {
    outline: 3px solid color-mix(in srgb, var(--primary) 35%, #fff 65%);
    outline-offset: 2px;
}

/* 响应式 */
@media (max-width: 768px) {
    body {
        font-size: 14px;
        -webkit-text-size-adjust: 100%;
        -webkit-font-smoothing: antialiased;
        -moz-osx-font-smoothing: grayscale;
    }
    
    .drawer, .history {
        width: 100%;
        border-radius: 0;
    }
    
    .main {
        padding: 15px;
        margin: 60px 0 220px 0;
    }
    
    .card {
        padding: 25px 15px;
        margin: 8px auto;
        max-width: 90%;
        border-radius: 16px;
        box-shadow: none;
        transition: all 0.3s ease;
    }
    
    .card:hover {
        transform: translateY(-2px);
    }
    
    .card__name {
        font-size: 26px;
        font-weight: 600;
        letter-spacing: 0.5px;
    }
    
    .card__name.long-text {
        font-size: 20px;
    }
    
    .card__name.very-long-text {
        font-size: 17px;
    }
    
    .card__name.extra-long-text {
        font-size: 14px;
    }
    
    .controls {
        padding: 20px 15px;
        background: rgba(255, 255, 255, 0.95);
        backdrop-filter: blur(10px);
        border-radius: 20px 20px 0 0;
    }
    
    .control-row {
        flex-direction: column;
        align-items: stretch;
        gap: 12px;
        margin-bottom: 12px;
    }
    
    .mode-tabs {
        flex-wrap: wrap;
        justify-content: center;
        gap: 8px;
        padding: 12px;
        background: rgba(0, 0, 0, 0.02);
        border-radius: 12px;
        margin-bottom: 15px;
    }
    
    .mode-tab {
        padding: 10px 18px;
        font-size: 13px;
        min-width: 85px;
        text-align: center;
        border-radius: 20px;
        font-weight: 500;
        transition: all 0.2s ease;
    }
    
    .mode-tab.active {
        transform: scale(1.05);
    }
    
    .btn {
        padding: 12px 24px;
        font-size: 14px;
        width: 100%;
        justify-content: center;
        border-radius: 12px;
        font-weight: 500;
        transition: all 0.2s ease;
    }
    
    .btn:active {
        transform: scale(0.98);
    }
    
    .slider-container {
        flex-direction: column;
        align-items: stretch;
        min-width: auto;
        gap: 10px;
        background: rgba(0, 0, 0, 0.02);
        padding: 15px;
        border-radius: 12px;
    }
    
    .slider-container label {
        text-align: center;
        font-size: 13px;
        font-weight: 500;
        color: var(--text-secondary);
    }
    
    .slider {
        height: 6px;
        border-radius: 3px;
    }
    
    .mode-options {
        padding: 20px 15px;
        border-radius: 16px;
        background: rgba(255, 255, 255, 0.8);
        backdrop-filter: blur(5px);
    }
    
    .header {
        padding: 12px 20px;
        flex-wrap: wrap;
        gap: 12px;
        background: rgba(255, 255, 255, 0.95);
        backdrop-filter: blur(10px);
    }
    
    .header-controls {
        flex-wrap: wrap;
        gap: 10px;
    }
    
    .voice-toggle, .theme-selector {
        padding: 8px 14px;
        font-size: 12px;
        border-radius: 20px;
        font-weight: 500;
    }
    
    .theme-btn {
        width: 22px;
        height: 22px;
        border-radius: 50%;
        transition: all 0.2s ease;
    }
    
    .theme-btn:active {
        transform: scale(0.9);
    }
    
    .drawer-toggle {
        width: 50px;
        height: auto;
        min-height: 70px;
        border-radius: 25px;
        padding: 10px 6px;
    }
    .drawer-toggle .icon {
        width: 24px;
        height: 24px;
    }
    .toggle-text {
        font-size: 13px;
    }
    
    .barrage-item {
        padding: 12px 20px;
        font-size: 15px;
        border-radius: 20px;
        font-weight: 500;
        backdrop-filter: blur(10px);
    }
    
    .timer-display {
        font-size: 26px;
        font-weight: 700;
        text-shadow: 0 3px 6px rgba(0, 0, 0, 0.15);
        letter-spacing: 1.5px;
    }
    
    .progress-bar {
        border-radius: 10px;
        overflow: hidden;
    }
    
    .progress-fill {
        border-radius: 10px;
    }
}

@media (max-width: 480px) {
    body {
        font-size: 13px;
    }
    
    .main {
        padding: 10px;
        margin: 60px 0 240px 0;
    }
    
    .card {
        padding: 20px 12px;
        margin: 6px auto;
        max-width: 95%;
        border-radius: 14px;
        background: transparent;
        box-shadow: none;
    }
    
    .card__name {
        font-size: 22px;
        line-height: 1.2;
        font-weight: 600;
    }
    
    .card__name.long-text {
        font-size: 17px;
    }
    
    .card__name.very-long-text {
        font-size: 15px;
    }
    
    .card__name.extra-long-text {
        font-size: 12px;
    }
    
    .controls {
        padding: 15px 10px;
        border-radius: 16px 16px 0 0;
    }
    
    .mode-tabs {
        padding: 10px;
        gap: 6px;
        border-radius: 10px;
        margin-bottom: 12px;
    }
    
    .mode-tab {
        padding: 8px 14px;
        font-size: 12px;
        min-width: 75px;
        border-radius: 16px;
    }
    
    .btn {
        padding: 10px 20px;
        font-size: 13px;
        border-radius: 10px;
    }
    
    .slider-container {
        padding: 12px;
        border-radius: 10px;
        gap: 8px;
    }
    
    .slider-container label {
        font-size: 12px;
    }
    
    .header {
        padding: 10px 15px;
        gap: 8px;
    }
    
    .logo {
        font-size: 16px;
        font-weight: 600;
    }
    
    .voice-toggle, .theme-selector {
        padding: 6px 12px;
        font-size: 11px;
        border-radius: 16px;
    }
    
    .theme-btn {
        width: 20px;
        height: 20px;
    }
    
    .drawer-toggle {
        width: 45px;
        height: auto;
        min-height: 65px;
        border-radius: 22px;
        padding: 8px 5px;
    }
    .drawer-toggle .icon {
        width: 22px;
        height: 22px;
    }
    .toggle-text {
        font-size: 12px;
    }
    
    .timer-display {
        font-size: 22px;
        font-weight: 700;
        text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
        letter-spacing: 1px;
    }
    
    .barrage-item {
        padding: 10px 16px;
        font-size: 13px;
        border-radius: 16px;
    }
    
    .mode-options {
        padding: 15px 10px;
        border-radius: 12px;
    }
}

/* 无障碍 */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Toast 提示 */
.toast {
    position: fixed;
    top: 80px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--text);
    color: white;
    padding: 15px 25px;
    border-radius: 25px;
    box-shadow: 0 4px 12px var(--shadow);
    z-index: 2000;
    animation: toastIn 0.3s ease;
}

@keyframes toastIn {
    from {
        transform: translateX(-50%) translateY(-20px);
        opacity: 0;
    }
    to {
        transform: translateX(-50%) translateY(0);
        opacity: 1;
    }
}

/* =====================
   外观增强（不改结构）
   ===================== */

/* 全局排版与抗锯齿 */
html, body {
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

/* 语义层级：标题更突出 */
.card__name#displayName {
    letter-spacing: 0.5px;
    text-shadow: 0 6px 30px rgba(0,0,0,0.15);
}

/* 顶部栏与控制区微调 */
.header {
    border-bottom: 1px solid var(--border);
}
.voice-toggle {
    box-shadow: 0 2px 8px var(--shadow);
}
.voice-toggle:active {
    transform: translateY(0);
    box-shadow: 0 2px 6px var(--shadow);
}
.theme-btn {
    box-shadow: 0 2px 8px var(--shadow);
}
.theme-btn:hover {
    transform: translateY(-1px) scale(1.06);
}

/* 主卡片质感提升 */
.card {
    border: none;
    border-radius: 20px;
    box-shadow: none;
}
.card:hover {
    transform: translateY(-4px);
}

/* 3D 卡片更清晰的正反面对比 */
.card-face {
    border-radius: 18px;
    box-shadow: none;
}
.card-back#cardBack {
    background: transparent;
    color: var(--text);
    font-size: 56px;
    font-weight: bold;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    display: flex;
    align-items: center;
    justify-content: center;
    text-shadow: 0 6px 30px rgba(0,0,0,0.15);
    letter-spacing: 0.5px;
}

/* 3D卡片长文本响应式样式 */
.card-back#cardBack.long-text {
    font-size: 36px;
}

.card-back#cardBack.very-long-text {
    font-size: 24px;
}

.card-back#cardBack.extra-long-text {
    font-size: 18px;
}

/* 抽屉与滚动条优化 */
.drawer, .history {
    border: 1px solid var(--border);
}
.drawer::-webkit-scrollbar, .history::-webkit-scrollbar, body::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}
.drawer::-webkit-scrollbar-thumb, .history::-webkit-scrollbar-thumb, body::-webkit-scrollbar-thumb {
    background: var(--text-light);
    border-radius: 10px;
}
.drawer::-webkit-scrollbar-track, .history::-webkit-scrollbar-track, body::-webkit-scrollbar-track {
    background: transparent;
}

/* 历史列表的卡片化项 */
.history-item {
    background: rgba(255,255,255,0.5);
    border-radius: 12px;
    margin: 10px;
    border: 1px solid var(--border);
}

/* 按钮的视觉层级与交互态 */
.btn {
    border-radius: 14px;
    box-shadow: 0 6px 18px rgba(0,0,0,0.08);
    transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}
.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--accent));
}
.btn-secondary {
    background: linear-gradient(135deg, var(--text-light), var(--text));
}

.btn-danger {
    background: linear-gradient(135deg, #e53935, #b71c1c);
}
.btn:focus-visible {
    outline: 3px solid var(--primary);
    outline-offset: 2px;
}

/* 教程弹窗 */
.modal-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.35);
    z-index: 1500;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}
.modal {
    width: 100%;
    max-width: 720px;
    background: var(--card-bg);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border);
    border-radius: 16px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.2);
    color: var(--text);
    overflow: hidden;
}
.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    border-bottom: 1px solid var(--border);
}
.modal-body {
    padding: 18px 20px 22px;
    line-height: 1.7;
}
.modal-body ol { padding-left: 22px; }
.modal-body li { margin: 8px 0; }
.modal-close {
    appearance: none;
    border: none;
    background: transparent;
    font-size: 22px;
    line-height: 1;
    cursor: pointer;
    color: var(--text);
}
.modal-close:hover { opacity: 0.8; }

@media (max-width: 768px) {
    .modal { max-width: 92%; }
}

/* 模式标签更清晰的选中态 */
.mode-tab {
    border-radius: 12px;
    border: 1px solid transparent;
    background: rgba(255,255,255,0.6);
}
.mode-tab.active {
    border-color: var(--primary);
    background: var(--primary);
    color: #fff;
    box-shadow: 0 6px 22px rgba(0,0,0,0.10);
}

/* 来自 index.html 的覆盖规则：保持单名与 3D 面字号一致 */
.card__name:not(.multi-names) { font-size: 80px !important; }
.card__name.long-text:not(.multi-names),
.card__name.very-long-text:not(.multi-names),
.card__name.extra-long-text:not(.multi-names) { font-size: 80px !important; }
.card-face { font-size: 80px !important; }

/* 输入控件手感 */
input[type="range"].slider {
    accent-color: var(--primary);
}
select, input[type="number"], textarea.student-input {
    border-radius: 12px;
    border: 1px solid var(--border);
    box-shadow: inset 0 1px 0 rgba(255,255,255,0.4);
}
select:focus-visible, input[type="number"]:focus-visible, textarea.student-input:focus-visible {
    outline: 3px solid color-mix(in srgb, var(--primary) 35%, #fff 65%);
    outline-offset: 2px;
}

/* 侧边抽屉触发按钮 */
.drawer-toggle.left, .drawer-toggle.right {
    border: 1px solid var(--border);
    box-shadow: 0 8px 20px rgba(0,0,0,0.12);
}
.drawer-toggle:hover {
    transform: translateY(-2px);
}

/* 计时器读数更具可读性 */
.timer-display#timerDisplay {
    text-shadow: 0 6px 24px rgba(0,0,0,0.2);
    letter-spacing: 2px;
    font-family: 'Courier New', monospace;
}

/* 弹幕气泡化与轻阴影 */
.barrage-item {
    border: 1px solid rgba(0,0,0,0.06);
    box-shadow: 0 8px 24px rgba(0,0,0,0.10);
}

/* 暗色/极客主题对比度保护 */
[data-theme="geek"] .history-item,
[data-theme="geek"] .mode-tab {
    background: rgba(20,20,20,0.6);
}
[data-theme="geek"] .btn-secondary {
    background: #3a3a3a;
}

/* 高对比主题的可访问性描边 */
[data-theme="high-contrast"] .btn:focus-visible,
[data-theme="high-contrast"] select:focus-visible,
[data-theme="high-contrast"] input[type="number"]:focus-visible,
[data-theme="high-contrast"] textarea.student-input:focus-visible {
    outline: 3px solid #ff0000;
}

/* 提升莫兰迪主题的按钮文字可读性 */
[data-theme="morandi"] .btn-primary,
[data-theme="morandi"] .btn-secondary,
[data-theme="morandi"] .mode-tab.active {
    color: #ffffff;
}