/* ===== 全局样式 ===== */
:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --secondary: #ec4899;
    --accent: #06b6d4;
    --bg: #f8fafc;
    --card-bg: #ffffff;
    --text: #1e293b;
    --text-muted: #64748b;
    --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    --radius: 16px;
}

* { box-sizing: border-box; }

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.main-content {
    flex: 1;
    padding: 2rem 0;
}

/* ===== 导航栏 ===== */
.navbar {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 50%, #7c3aed 100%);
    box-shadow: var(--shadow);
    padding: 0.8rem 0;
}

.navbar-brand {
    font-size: 1.4rem;
    letter-spacing: -0.5px;
}

.nav-link {
    font-weight: 500;
    padding: 0.5rem 1rem !important;
    border-radius: 8px;
    transition: background 0.2s;
}

.nav-link:hover {
    background: rgba(255,255,255,0.15);
}

/* ===== 视频卡片 ===== */
.video-card {
    background: var(--card-bg);
    border: none;
    border-radius: var(--radius);
    overflow: hidden;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: var(--shadow);
}

.video-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.video-thumb {
    position: relative;
    padding-bottom: 56.25%;
    background: linear-gradient(135deg, #1e1b4b, #312e81);
    overflow: hidden;
}

.video-thumb::after {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.25);
    transition: background 0.3s;
}

.video-card:hover .video-thumb::after {
    background: rgba(0, 0, 0, 0.1);
}

.video-thumb-icon {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 3rem;
    color: rgba(255, 255, 255, 0.85);
    transition: all 0.3s;
    z-index: 1;
}

.video-card:hover .video-thumb-icon {
    color: #fff;
    transform: translate(-50%, -50%) scale(1.2);
}

.video-badge {
    position: absolute;
    top: 12px;
    right: 12px;
    background: rgba(0,0,0,0.6);
    backdrop-filter: blur(4px);
    color: #fff;
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 0.75rem;
    z-index: 1;
}

/* ===== 按钮样式 ===== */
.btn-gradient {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: #fff;
    border: none;
    padding: 0.6rem 1.5rem;
    border-radius: 10px;
    font-weight: 600;
    transition: all 0.3s;
}

.btn-gradient:hover {
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(99, 102, 241, 0.4);
}

/* ===== 播放器 ===== */
.player-wrapper {
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    background: #000;
}

.player-wrapper video {
    width: 100%;
    display: block;
}

/* ===== 统计卡片 ===== */
.stat-card {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 1.5rem;
    text-align: center;
    box-shadow: var(--shadow);
    transition: transform 0.2s;
}

.stat-card:hover {
    transform: translateY(-3px);
}

.stat-card .icon {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.stat-card .number {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--text);
}

.stat-card .label {
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* ===== 页脚 ===== */
footer {
    background: #1e293b;
    color: #94a3b8;
    padding: 1.5rem 0;
    margin-top: auto;
}

/* ===== 动画 ===== */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.animate-in {
    animation: fadeInUp 0.5s ease-out forwards;
}

/* ===== 英雄区 ===== */
.hero {
    text-align: center;
    padding: 3rem 0 2rem;
}

.hero h1 {
    font-size: 2.5rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero p {
    color: var(--text-muted);
    font-size: 1.1rem;
}

/* ===== 响应式 ===== */
@media (max-width: 768px) {
    .hero h1 { font-size: 1.8rem; }
    .video-card { margin-bottom: 1rem; }
    .stat-card { margin-bottom: 1rem; }
}

/* ===== Toast 提示 ===== */
.toast-container {
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 9999;
}

/* ===== 分享模态框 ===== */
.share-link-input {
    background: #f1f5f9;
    border: 2px solid #e2e8f0;
    border-radius: 10px;
    padding: 12px 16px;
    font-family: monospace;
    font-size: 0.9rem;
}

.share-link-input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}