:root {
    /* 默认暗黑主题变量 */
    --primary-color: #2563eb;
    --primary-hover: #3b82f6;
    --primary-active: #1d4ed8;
    --primary-light: rgba(37, 99, 235, 0.1);
    
    --secondary-color: #d946ef;
    --secondary-hover: #e879f9;
    --secondary-active: #c026d3;
    
    --success-color: #10b981;
    --success-hover: #34d399;
    --success-active: #059669;
    
    --danger-color: #ef4444;
    --danger-hover: #f87171;
    --danger-active: #dc2626;
    
    --warning-color: #f59e0b;
    --warning-hover: #fbbf24;
    --warning-active: #d97706;
    
    --info-color: #3b82f6;
    --check-color: #8b5cf6;
    --check-hover: #a78bfa;
    --check-active: #7c3aed;
    
    --text-color: #cbd5e1;
    --text-muted: #94a3b8;
    --text-on-warning: #111;
    --text-on-primary: #ffffff;
    
    --bg-color: #1e293b;
    --surface-color: #334155;
    --border-color: #475569;
    --shadow-color: rgba(0, 0, 0, 0.5);
    --glass-bg: rgba(51, 65, 85, 0.75);
    --input-bg: rgba(203, 213, 225, 0.08);
    
    --backdrop-blur: 10px;
    --border-radius: 8px;
    --border-radius-sm: 4px;
    --transition-speed: 0.3s;
    --box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --box-shadow-hover: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

body[data-theme="light"] {
    /* 日间主题变量 */
    --primary-color: #3F51B5;
    --primary-hover: #5c6bc0;
    --primary-active: #303f9f;
    --primary-light: rgba(63, 81, 181, 0.1);
    
    --secondary-color: #2196F3;
    --secondary-hover: #42a5f5;
    --secondary-active: #1976d2;
    
    --success-color: #4caf50;
    --success-hover: #66bb6a;
    --success-active: #388e3c;
    
    --danger-color: #f44336;
    --danger-hover: #ef5350;
    --danger-active: #d32f2f;
    
    --warning-color: #ff9800;
    --warning-hover: #ffa726;
    --warning-active: #f57c00;
    
    --info-color: #2196F3;
    --check-color: #9c27b0;
    --check-hover: #ba68c8;
    --check-active: #7b1fa2;
    
    --text-color: #333333;
    --text-muted: #5c5c5c;
    --text-on-warning: #111;
    --text-on-primary: #ffffff;
    
    --bg-color: #f5f5f5;
    --surface-color: #ffffff;
    --border-color: #e0e0e0;
    --shadow-color: rgba(0, 0, 0, 0.1);
    --glass-bg: rgba(255, 255, 255, 0.85);
    --input-bg: #ffffff;
    
    --box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
    --box-shadow-hover: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -2px rgba(0, 0, 0, 0.04);
}

@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;500;600&display=swap');
* { box-sizing: border-box; }

body {
    font-family: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--bg-color); 
    color: var(--text-color);
    margin: 0; 
    padding: 0; 
    display: flex; 
    flex-direction: column;
    height: 100vh; 
    overflow: hidden; 
    transition: background-color var(--transition-speed), color var(--transition-speed);
}

.header {
    background: var(--glass-bg); 
    backdrop-filter: blur(var(--backdrop-blur)); 
    -webkit-backdrop-filter: blur(var(--backdrop-blur));
    padding: 15px 25px; 
    border-bottom: 1px solid var(--border-color); 
    box-shadow: var(--box-shadow);
    flex-shrink: 0; 
    z-index: 10; 
    transition: background-color var(--transition-speed), border-color var(--transition-speed);
}

.header-top { 
    display: flex; 
    align-items: center; 
    justify-content: space-between; 
    margin-bottom: 15px; 
}

.title-group { 
    display: flex; 
    align-items: center; 
    gap: 15px; 
}

.header h1 { 
    margin: 0; 
    font-size: 1.6em; 
    font-weight: 600; 
    background: linear-gradient(45deg, var(--primary-color), var(--info-color)); 
    -webkit-background-clip: text; 
    -webkit-text-fill-color: transparent; 
    display: flex;
    align-items: center;
    gap: 10px;
}

/* 图标按钮样式 */
.icon-btn {
    background: none; 
    border: none; 
    color: var(--text-muted); 
    font-size: 1.4em; 
    cursor: pointer;
    padding: 6px; 
    line-height: 1; 
    transition: all var(--transition-speed) ease;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
}

.icon-btn:hover { 
    color: var(--primary-color); 
    background-color: var(--primary-light);
    transform: rotate(90deg);
}

/* 状态栏样式 - 方形椭圆样式 */
#status-container { 
    display: flex; 
    gap: 12px; 
    padding: 8px 0;
    flex-wrap: wrap;
    justify-content: center;
}

.status-item { 
    font-size: 0.85em; 
    padding: 6px 14px; 
    border-radius: var(--border-radius); /* 使用方形椭圆（小弧度圆角） */
    background-color: var(--surface-color);
    border: 1px solid var(--border-color);
    text-align: center; 
    font-weight: 500; 
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 6px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    position: relative;
    overflow: hidden;
}

.status-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    opacity: 0.7;
}

#modeIndicator::before { background-color: var(--primary-color); }
#playbackIndicator::before { background-color: var(--success-color); }
#checkIndicator::before { background-color: var(--warning-color); }

.status-item i {
    font-size: 1em;
    width: 16px;
    text-align: center;
    transition: transform 0.3s ease;
}

.status-item:hover i {
    transform: scale(1.2);
}

.status-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.15);
}

#playbackIndicator { 
    min-width: 90px; 
}

/* 控制组样式 */
.header-controls { 
    display: flex;
    flex-direction: column;
    gap: 8px; /* 减少间距 */
}

/* 控制区域分隔 - 已移除虚线 */
.control-section {
    width: 100%;
    padding: 5px 0; /* 减少间距 */
}

/* 按钮组样式 */
.buttons-section {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 6px; /* 减少按钮间距 */
}

.actions-group {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 6px; /* 减少按钮间距 */
    width: 100%;
    justify-content: center;
}

.source-section {
    padding-bottom: 5px;
}

.proxy-section {
    padding-top: 5px;
}

.control-group { 
    display: flex; 
    align-items: center; 
}

.source-group { 
    flex-grow: 1; 
    min-width: 300px; 
    display: flex; 
}

/* 选择器样式 */
.select-wrapper { 
    position: relative; 
    display: flex; 
    align-items: center; 
}

.select-wrapper::after {
    content: '\f078'; 
    font-family: 'Font Awesome 6 Free'; 
    font-weight: 900;
    position: absolute; 
    right: 15px; 
    top: 50%; 
    transform: translateY(-50%);
    color: var(--text-muted); 
    pointer-events: none; 
    transition: color var(--transition-speed);
}

#sourceSelector {
    -webkit-appearance: none; 
    appearance: none;
    background-color: var(--input-bg); 
    color: var(--text-color);
    border: 1px solid var(--border-color); 
    border-right: none;
    border-radius: var(--border-radius) 0 0 var(--border-radius);
    padding: 10px 40px 10px 15px; 
    font-size: 1em; 
    width: auto; 
    max-width: 200px; /* PC端宽度 */
    cursor: pointer; 
    transition: all var(--transition-speed) ease;
    box-shadow: inset 0 1px 2px rgba(0,0,0,0.05);
}

/* 输入框样式 */
#sourceUrlInput, #proxyUrlInput, #searchInput {
    padding: 10px 15px; 
    border: 1px solid var(--border-color); 
    background-color: var(--input-bg);
    color: var(--text-color); 
    font-size: 1em; 
    transition: all var(--transition-speed) ease;
    box-shadow: inset 0 1px 2px rgba(0,0,0,0.05);
}

#sourceSelector:focus, 
#sourceUrlInput:focus, 
#proxyUrlInput:focus,
#searchInput:focus {
    background-color: transparent; 
    border-color: var(--primary-color);
    outline: none; 
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--primary-color) 25%, transparent),
                inset 0 1px 2px rgba(0,0,0,0.05);
}

#sourceUrlInput { 
    flex-grow: 1; 
    border-radius: 0 var(--border-radius) var(--border-radius) 0; 
}

#proxyUrlInput { 
    border-radius: var(--border-radius);
    width: 100%; 
}

/* 按钮通用样式 */
.btn {
    margin: 0; /* 移除额外外边距 */
    padding: 10px 15px; 
    border: none; 
    border-radius: var(--border-radius); 
    cursor: pointer;
    font-size: 1em; 
    font-weight: 500; 
    color: var(--text-on-primary);
    transition: all var(--transition-speed) ease; 
    display: flex; 
    align-items: center; 
    gap: 8px;
    white-space: nowrap;
    box-shadow: var(--box-shadow);
    position: relative;
    overflow: hidden;
}

/* 按钮文本使用中文 - 强制显示 */
.btn span {
    display: inline-block !important;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: all 0.5s ease;
}

.btn:hover::before {
    left: 100%;
}

.btn:hover:not(:disabled) { 
    transform: translateY(-2px); 
    box-shadow: var(--box-shadow-hover);
}

.btn:active:not(:disabled) { 
    transform: translateY(0); 
    box-shadow: var(--box-shadow);
}

.btn:disabled { 
    opacity: 0.7;
    cursor: not-allowed; 
    transform: none;
    box-shadow: none;
}

/* 按钮类型样式 */
.primary-btn { background-color: var(--primary-color); }
.primary-btn:hover:not(:disabled) { background-color: var(--primary-hover); }
.primary-btn:active:not(:disabled) { background-color: var(--primary-active); }

.warning-btn { 
    background-color: var(--warning-color); 
    color: var(--text-on-warning);
}
.warning-btn:hover:not(:disabled) { background-color: var(--warning-hover); }
.warning-btn:active:not(:disabled) { background-color: var(--warning-active); }

.success-btn { background-color: var(--success-color); }
.success-btn:hover:not(:disabled) { background-color: var(--success-hover); }
.success-btn:active:not(:disabled) { background-color: var(--success-active); }

.secondary-btn { background-color: var(--secondary-color); }
.secondary-btn:hover:not(:disabled) { background-color: var(--secondary-hover); }
.secondary-btn:active:not(:disabled) { background-color: var(--secondary-active); }

.danger-btn { background-color: var(--danger-color); }
.danger-btn:hover:not(:disabled) { background-color: var(--danger-hover); }
.danger-btn:active:not(:disabled) { background-color: var(--danger-active); }

.check-btn { background-color: var(--check-color); }
.check-btn:hover:not(:disabled) { background-color: var(--check-hover); }
.check-btn:active:not(:disabled) { background-color: var(--check-active); }

.export-btn { background-color: var(--info-color); }
.export-btn:hover:not(:disabled) { background-color: var(--primary-hover); }
.export-btn:active:not(:disabled) { background-color: var(--primary-active); }

#localFileInput { display: none; }

/* 主容器样式 */
.container { 
    display: flex; 
    flex-grow: 1; 
    overflow: hidden; 
    position: relative; 
}

#playlist { 
    width: 350px; 
    background-color: var(--surface-color); 
    border-right: 1px solid var(--border-color);
    flex-shrink: 0; 
    display: flex; 
    flex-direction: column;
    transition: transform var(--transition-speed) ease, background-color var(--transition-speed), border-color var(--transition-speed); 
}

#playlist-controls {
    padding: 15px; 
    border-bottom: 1px solid var(--border-color); 
    background: var(--glass-bg);
    backdrop-filter: blur(var(--backdrop-blur)); 
    transition: border-color var(--transition-speed), background-color var(--transition-speed);
}

#search-container { 
    display: flex; 
    gap: 10px; 
    margin-bottom: 15px; 
}

#searchInput { 
    width: 100%; 
    background-color: var(--input-bg); 
    flex-grow: 1; 
    border-radius: var(--border-radius); 
    border: 1px solid var(--border-color); 
}

#checkAvailabilityBtn, #exportBtn { 
    flex-shrink: 0; 
    padding: 10px; 
}

#checkAvailabilityBtn .btn-text, #exportBtn .btn-text { 
    display: none; 
}

#filter-container { 
    display: grid; 
    grid-template-columns: 1fr 1fr 1fr; 
    gap: 8px; 
}

.filter-btn { 
    padding: 8px 10px; 
    font-size: 0.9em; 
    justify-content: center; 
    background-color: var(--border-color); 
    color: var(--text-muted); 
}

.filter-btn.active { 
    background-color: var(--primary-color); 
    color: white; 
    font-weight: 600; 
}

#channel-list { 
    overflow-y: auto; 
    flex-grow: 1; 
    position: relative; 
}

#channel-list::-webkit-scrollbar { 
    width: 8px; 
}

#channel-list::-webkit-scrollbar-track { 
    background: var(--surface-color); 
}

#channel-list::-webkit-scrollbar-thumb { 
    background-color: var(--border-color); 
    border-radius: 4px; 
    border: 2px solid var(--surface-color); 
    transition: background-color var(--transition-speed);
}

#channel-list::-webkit-scrollbar-thumb:hover { 
    background-color: var(--primary-color); 
}

/* 频道项样式 */
.channel-item {
    display: flex; 
    justify-content: space-between; 
    align-items: center;
    padding: 12px 18px; 
    cursor: pointer; 
    border-bottom: 1px solid var(--border-color);
    white-space: nowrap; 
    overflow: hidden; 
    text-overflow: ellipsis; 
    font-size: 0.95em;
    transition: all var(--transition-speed) ease;
}

.channel-name { 
    flex-grow: 1; 
    overflow: hidden; 
    text-overflow: ellipsis; 
}

.channel-status { 
    margin-left: 10px; 
    font-size: 0.85em; 
    font-weight: bold; 
    flex-shrink: 0; 
    padding: 2px 6px; 
    border-radius: 4px; 
}

.status-available { 
    color: var(--success-color); 
    background-color: rgba(16, 185, 129, 0.1);
}

.status-unavailable { 
    color: var(--danger-color); 
    background-color: rgba(239, 68, 68, 0.1);
}

.status-checking { 
    color: var(--warning-color); 
    background-color: rgba(245, 158, 11, 0.1);
}

.channel-item:hover { 
    background-color: var(--primary-light); 
}

.channel-item.active { 
    background: linear-gradient(90deg, var(--primary-color), var(--primary-hover)); 
    color: white; 
    font-weight: 600; 
}

/* 加载器样式 */
.loader { 
    width: 48px; 
    height: 48px; 
    border: 3px solid var(--text-color); 
    border-bottom-color: transparent; 
    border-radius: 50%; 
    display: none; 
    animation: rotation 1s linear infinite; 
    position: absolute; 
    top: 40%; 
    left: 50%; 
    transform: translate(-50%, -50%); 
}

@keyframes rotation { 
    from { transform: rotate(0deg); } 
    to { transform: rotate(360deg); } 
}

#video-container { 
    flex-grow: 1; 
    background-color: #000; 
    display: flex; 
    justify-content: center; 
    align-items: center; 
}

#videoPlayer { 
    width: 100%; 
    height: 100%; 
}

.status-message { 
    padding: 40px 20px; 
    text-align: center; 
    color: var(--text-muted); 
    font-size: 1.1em; 
}

/* 浮动按钮样式 */
.floating-btn {
    display: none;
    position: fixed;
    bottom: 60px;
    right: 20px;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background-color: var(--primary-color);
    color: white;
    justify-content: center;
    align-items: center;
    font-size: 1.5em;
    z-index: 1001;
    box-shadow: 0 4px 12px rgba(0,0,0,0.2);
    border: none;
    cursor: pointer;
    transition: all var(--transition-speed) ease;
}

.floating-btn:hover {
    transform: scale(1.1) rotate(90deg);
    background-color: var(--primary-hover);
}

/* 平板样式 - 屏幕宽度小于等于992px */
@media (max-width: 992px) {
    .buttons-section {
        justify-content: center;
    }
    
    .proxy-section {
        width: 100%;
    }
    
    .btn {
        padding: 8px 12px;
        font-size: 0.9em;
    }
}

/* 移动端样式 - 屏幕宽度小于等于768px */
@media (max-width: 768px) {
    body { 
        overflow: auto; 
    }
    
    .header { 
        padding: 10px 15px; /* 减少内边距 */
    }
    
    h1 { 
        font-size: 1.4em !important; 
    }
    
    /* 状态栏样式 */
    .status-item { 
        font-size: 0.75em; 
        padding: 4px 10px; 
        margin-bottom: 5px;
    }
    
    .status-item i {
        display: none; /* 移动端隐藏状态图标 */
    }
    
    #playbackIndicator { 
        min-width: 75px; 
    }
    
    /* 控制区域布局 */
    .header-controls { 
        gap: 6px; /* 减少间距 */
    }
    
    .control-section {
        padding: 3px 0; /* 减少区域间距 */
    }
    
    /* 源选择器 - 宽度减少一半 */
    #sourceSelector {
        max-width: 100px; /* 移动端宽度减少一半 */
    }
    
    /* 按钮组样式 */
    .actions-group {
        justify-content: center;
        gap: 4px; /* 减少按钮间距 */
    }
    
    /* 按钮样式 - 确保中文显示 */
    .btn { 
        justify-content: center; 
        padding: 8px 10px; 
        font-size: 0.85em;
        min-width: auto;
    }
    
    .btn i {
        font-size: 0.9em;
    }
    
    #checkAvailabilityBtn .btn-text, #exportBtn .btn-text { 
        display: block; 
    }
    
    #checkAvailabilityBtn, #exportBtn { 
        padding: 10px 15px; 
        width: auto;
        height: auto;
    }
    
    /* 主容器布局 */
    .container { 
        flex-direction: column; 
        overflow: visible; 
    }
    
    #video-container { 
        order: 1; 
        height: 56.25vw; 
        min-height: 210px; 
        width: 100%; 
    }
    
    /* 播放列表样式 */
    #playlist {
        position: fixed; 
        bottom: 0; 
        left: 0; 
        right: 0; 
        width: 100%; 
        height: 60vh;
        transform: translateY(100%); 
        border-right: none; 
        border-top: 2px solid var(--primary-color);
        z-index: 1000; 
        box-shadow: 0 -5px 20px var(--shadow-color);
    }
    
    #playlist.open { 
        transform: translateY(0); 
    }
    
    /* 显示移动端播放列表切换按钮 */
    #playlist-toggle {
        display: flex;
    }
    
    /* 源URL输入框调整 */
    #sourceUrlInput {
        flex-grow: 1;
        min-width: 100px;
    }
}

/* 分组样式 */
.group-header {
    padding: 12px 18px;
    background-color: var(--surface-color);
    border-bottom: 1px solid var(--border-color);
    font-weight: 600;
    color: var(--primary-color);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: background-color var(--transition-speed);
}

.group-header:hover {
    background-color: var(--primary-light);
}

.group-header .group-name {
    display: flex;
    align-items: center;
    gap: 8px;
}

.group-header .group-count {
    font-size: 0.8em;
    background-color: var(--primary-light);
    color: var(--primary-color);
    padding: 2px 8px;
    border-radius: 12px;
    font-weight: normal;
}

/* 分组内容容器 */
.group-content {
    overflow: hidden;
    transition: max-height 0.3s ease;
}

/* 分组折叠/展开图标 */
.group-toggle {
    transition: transform var(--transition-speed);
}

.group-header.collapsed .group-toggle {
    transform: rotate(-90deg);
}

/* 优化频道项在分组中的样式 */
.group-content .channel-item {
    padding-left: 30px;
}