/**
 * ============================================================================
 * 观众观看直播页面样式 - 轻奢高级版
 * 前缀: lw- (live watch)
 * 设计理念：简约雅致、层次分明、动效流畅、全端适配
 * ============================================================================
 */

/* ==================== 设计变量 ==================== */
:root {
    --lw-primary: #6366F1;
    --lw-primary-light: #818CF8;
    --lw-primary-dark: #4F46E5;
    --lw-accent: #F43F5E;
    --lw-accent-light: #FB7185;
    --lw-success: #10B981;
    --lw-gold: #F59E0B;
    --lw-dark: #0F172A;
    --lw-dark-light: #1E293B;
    --lw-gray: #64748B;
    --lw-gray-light: #94A3B8;
    --lw-border: rgba(148, 163, 184, 0.2);
    --lw-shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --lw-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
    --lw-shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
    --lw-shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
    --lw-radius: 12px;
    --lw-radius-lg: 16px;
    --lw-radius-xl: 24px;
    --lw-transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --lw-transition-fast: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ==================== 页面容器 ==================== */
.lw-page {
    min-height: 100vh;
    background: linear-gradient(135deg, #F8FAFC 0%, #EEF2FF 50%, #FDF4FF 100%);
    padding: 24px;
}

.lw-container {
    display: grid;
    grid-template-columns: 1fr 380px;
    gap: 24px;
    max-width: 1440px;
    margin: 0 auto;
}

/* ==================== 主区域 ==================== */
.lw-main {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

/* ==================== 头部信息 ==================== */
.lw-header {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.9), rgba(255, 255, 255, 0.7));
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 20px 24px;
    border-radius: var(--lw-radius-lg);
    border: 1px solid var(--lw-border);
    box-shadow: var(--lw-shadow);
}

.lw-header-info {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 16px;
}

.lw-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--lw-dark);
    margin: 0 0 12px;
    letter-spacing: -0.02em;
    line-height: 1.3;
}

.lw-meta {
    display: flex;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
}

.lw-status {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 14px;
    border-radius: 100px;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.02em;
}

.lw-status-live {
    background: linear-gradient(135deg, rgba(244, 63, 94, 0.15), rgba(251, 113, 133, 0.1));
    color: var(--lw-accent);
    border: 1px solid rgba(244, 63, 94, 0.2);
}

.lw-status-live .lw-status-dot {
    width: 8px;
    height: 8px;
    background: var(--lw-accent);
    border-radius: 50%;
    animation: lw-pulse 1.5s ease-in-out infinite;
}

@keyframes lw-pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(0.8); }
}

.lw-viewers {
    font-size: 14px;
    color: var(--lw-gray);
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 500;
}

.lw-viewers i {
    color: var(--lw-primary);
}

/* ==================== 视频区域 ==================== */
.lw-video-wrapper {
    position: relative;
    border-radius: var(--lw-radius-xl);
    overflow: hidden;
    box-shadow: var(--lw-shadow-xl);
}

.lw-video-container {
    position: relative;
    width: 100%;
    aspect-ratio: 16 / 9;
    background: linear-gradient(180deg, var(--lw-dark) 0%, var(--lw-dark-light) 100%);
    overflow: hidden;
}

.lw-video {
    width: 100%;
    height: 100%;
    object-fit: contain;
    background: transparent;
}

.lw-video-placeholder {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: radial-gradient(ellipse at center, rgba(99, 102, 241, 0.1) 0%, transparent 70%);
}

.lw-loading {
    text-align: center;
    color: rgba(255, 255, 255, 0.9);
    padding: 40px;
}

.lw-loading-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 24px;
    background: linear-gradient(135deg, var(--lw-primary), var(--lw-primary-light));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: lw-float 3s ease-in-out infinite;
    box-shadow: 0 0 40px rgba(99, 102, 241, 0.4);
}

.lw-loading-icon i {
    font-size: 32px;
    color: white;
}

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

.lw-loading-title {
    font-size: 18px;
    font-weight: 600;
    margin: 0 0 8px;
    letter-spacing: 0.02em;
}

.lw-loading-subtitle {
    font-size: 14px;
    opacity: 0.7;
    margin: 0;
}

.lw-controls {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.6));
    opacity: 0;
    transition: var(--lw-transition);
}

.lw-video-wrapper:hover .lw-controls {
    opacity: 1;
}

.lw-control-group {
    display: flex;
    gap: 12px;
}

.lw-control-btn {
    width: 40px;
    height: 40px;
    border: none;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--lw-transition-fast);
    font-size: 16px;
}

.lw-control-btn:hover {
    background: rgba(255, 255, 255, 0.25);
    transform: scale(1.1);
}

.lw-control-btn:active {
    transform: scale(0.95);
}

/* ==================== 导师卡片 ==================== */
.lw-mentor-card {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 20px;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.9), rgba(255, 255, 255, 0.7));
    backdrop-filter: blur(20px);
    border-radius: var(--lw-radius-lg);
    border: 1px solid var(--lw-border);
    box-shadow: var(--lw-shadow);
    transition: var(--lw-transition);
}

.lw-mentor-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--lw-shadow-lg);
}

.lw-mentor-avatar {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    overflow: hidden;
    border: 3px solid var(--lw-primary);
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.1);
    flex-shrink: 0;
}

.lw-mentor-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.lw-mentor-info {
    flex: 1;
    min-width: 0;
}

.lw-mentor-name {
    font-size: 16px;
    font-weight: 600;
    color: var(--lw-dark);
    margin: 0 0 4px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.lw-mentor-title {
    font-size: 13px;
    color: var(--lw-gray);
    margin: 0;
}

.lw-follow-btn {
    padding: 10px 20px;
    border: none;
    border-radius: 100px;
    background: linear-gradient(135deg, var(--lw-primary), var(--lw-primary-light));
    color: white;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: var(--lw-transition);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
    flex-shrink: 0;
}

.lw-follow-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.4);
}

.lw-follow-btn.followed {
    background: linear-gradient(135deg, var(--lw-gray-light), var(--lw-gray));
    box-shadow: none;
}

/* ==================== 侧边栏 ==================== */
.lw-sidebar {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

/* ==================== 弹幕互动区 ==================== */
.lw-chat-card {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.9), rgba(255, 255, 255, 0.7));
    backdrop-filter: blur(20px);
    border-radius: var(--lw-radius-lg);
    border: 1px solid var(--lw-border);
    box-shadow: var(--lw-shadow);
    display: flex;
    flex-direction: column;
    height: 420px;
    overflow: hidden;
}

.lw-chat-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--lw-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: rgba(255, 255, 255, 0.5);
}

.lw-chat-title {
    font-size: 15px;
    font-weight: 600;
    color: var(--lw-dark);
    margin: 0;
    display: flex;
    align-items: center;
    gap: 10px;
}

.lw-chat-title i {
    color: var(--lw-primary);
    font-size: 16px;
}

.lw-online-badge {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 4px 12px;
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.1), rgba(16, 185, 129, 0.05));
    border-radius: 100px;
    font-size: 12px;
    font-weight: 600;
    color: var(--lw-success);
}

.lw-online-badge i {
    font-size: 10px;
}

.lw-chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 16px 20px;
    scroll-behavior: smooth;
}

.lw-chat-messages::-webkit-scrollbar {
    width: 6px;
}

.lw-chat-messages::-webkit-scrollbar-track {
    background: transparent;
}

.lw-chat-messages::-webkit-scrollbar-thumb {
    background: var(--lw-border);
    border-radius: 3px;
}

.lw-chat-welcome {
    text-align: center;
    padding: 48px 24px;
    color: var(--lw-gray);
}

.lw-chat-welcome-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 16px;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1), rgba(99, 102, 241, 0.05));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.lw-chat-welcome-icon i {
    font-size: 28px;
    color: var(--lw-primary);
}

.lw-chat-welcome-title {
    font-size: 15px;
    font-weight: 600;
    margin: 0 0 8px;
    color: var(--lw-dark);
}

.lw-chat-welcome-text {
    font-size: 13px;
    margin: 0;
}

.lw-danmu-item {
    display: flex;
    gap: 8px;
    padding: 10px 0;
    font-size: 14px;
    animation: lw-slide-in 0.3s ease-out;
}

@keyframes lw-slide-in {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.lw-danmu-name {
    color: var(--lw-primary);
    font-weight: 600;
    flex-shrink: 0;
}

.lw-danmu-name::after {
    content: '：';
}

.lw-danmu-content {
    color: var(--lw-dark);
    word-break: break-word;
    line-height: 1.5;
}

.lw-danmu-me .lw-danmu-name {
    color: var(--lw-success);
}

.lw-chat-input {
    display: flex;
    gap: 12px;
    padding: 16px 20px;
    border-top: 1px solid var(--lw-border);
    background: rgba(255, 255, 255, 0.5);
}

.lw-input {
    flex: 1;
    height: 40px;
    padding: 0 16px;
    border: 1px solid var(--lw-border);
    border-radius: 100px;
    font-size: 14px;
    color: var(--lw-dark);
    background: white;
    transition: var(--lw-transition-fast);
}

.lw-input:focus {
    outline: none;
    border-color: var(--lw-primary);
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.1);
}

.lw-input::placeholder {
    color: var(--lw-gray-light);
}

.lw-send-btn {
    width: 40px;
    height: 40px;
    border: none;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--lw-primary), var(--lw-primary-light));
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--lw-transition);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
    flex-shrink: 0;
}

.lw-send-btn:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 16px rgba(99, 102, 241, 0.4);
}

.lw-send-btn:active {
    transform: scale(0.95);
}

/* ==================== 直播信息卡片 ==================== */
.lw-info-card {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.9), rgba(255, 255, 255, 0.7));
    backdrop-filter: blur(20px);
    border-radius: var(--lw-radius-lg);
    border: 1px solid var(--lw-border);
    box-shadow: var(--lw-shadow);
    overflow: hidden;
}

.lw-info-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--lw-border);
    background: rgba(255, 255, 255, 0.5);
}

.lw-info-title {
    font-size: 15px;
    font-weight: 600;
    color: var(--lw-dark);
    margin: 0;
    display: flex;
    align-items: center;
    gap: 10px;
}

.lw-info-title i {
    color: var(--lw-primary);
}

.lw-info-body {
    padding: 16px 20px;
}

.lw-info-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 0;
    border-bottom: 1px solid var(--lw-border);
}

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

.lw-info-label {
    font-size: 14px;
    color: var(--lw-gray);
    font-weight: 500;
}

.lw-info-value {
    font-size: 14px;
    font-weight: 600;
    color: var(--lw-dark);
    font-variant-numeric: tabular-nums;
}

.lw-like-section {
    padding: 20px;
    border-top: 1px solid var(--lw-border);
}

.lw-like-btn {
    width: 100%;
    padding: 14px;
    border: none;
    border-radius: var(--lw-radius);
    background: linear-gradient(135deg, var(--lw-accent), var(--lw-accent-light));
    color: white;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    transition: var(--lw-transition);
    box-shadow: 0 4px 16px rgba(244, 63, 94, 0.3);
    letter-spacing: 0.02em;
}

.lw-like-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 24px rgba(244, 63, 94, 0.4);
}

.lw-like-btn:active {
    transform: translateY(-1px);
}

.lw-like-btn.liked {
    background: linear-gradient(135deg, var(--lw-success), #34D399);
    box-shadow: 0 4px 16px rgba(16, 185, 129, 0.3);
}

.lw-like-btn i {
    font-size: 18px;
}

/* ==================== 隐藏字段 ==================== */
.lw-hidden {
    display: none;
}

/* ==================== 响应式设计 ==================== */
@media (max-width: 1200px) {
    .lw-container {
        grid-template-columns: 1fr 340px;
        gap: 20px;
    }
}

@media (max-width: 1024px) {
    .lw-page {
        padding: 16px;
    }
    
    .lw-container {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    
    .lw-sidebar {
        order: -1;
    }
    
    .lw-chat-card {
        max-height: 320px;
    }
}

@media (max-width: 768px) {
    .lw-page {
        padding: 12px;
    }
    
    .lw-header {
        padding: 16px;
    }
    
    .lw-title {
        font-size: 18px;
    }
    
    .lw-mentor-card {
        padding: 16px;
    }
    
    .lw-mentor-avatar {
        width: 48px;
        height: 48px;
    }
    
    .lw-follow-btn {
        padding: 8px 16px;
        font-size: 13px;
    }
    
    .lw-chat-card {
        height: 280px;
    }
}

@media (max-width: 480px) {
    .lw-page {
        padding: 8px;
    }
    
    .lw-header-info {
        flex-direction: column;
        gap: 12px;
    }
    
    .lw-meta {
        gap: 12px;
    }
    
    .lw-mentor-card {
        flex-wrap: wrap;
    }
    
    .lw-mentor-info {
        order: 1;
        width: 100%;
    }
    
    .lw-follow-btn {
        order: 2;
        width: 100%;
        justify-content: center;
    }
}

/* ==================== 打印样式 ==================== */
@media print {
    .lw-page {
        background: white;
        padding: 0;
    }
    
    .lw-controls,
    .lw-chat-card,
    .lw-like-section {
        display: none;
    }
}