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

:root {
    --bg: #09090b;
    --bg-secondary: #0f0f11;
    --card: #18181b;
    --card-hover: #27272a;
    --border: #27272a;
    --text: #fafafa;
    --text-muted: #a1a1aa;
    --primary: #3b82f6;
    --primary-hover: #2563eb;
    --success: #22c55e;
    --error: #ef4444;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    line-height: 1.6;
}

/* 导航栏 */
.navbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 20px;
    height: 60px;
    background: var(--card);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
}

.navbar-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--text);
    font-weight: 600;
    font-size: 16px;
}

.navbar-logo {
    width: 32px;
    height: 32px;
    background: linear-gradient(135deg, var(--primary), #8b5cf6);
    color: #fff;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 15px;
}

.navbar-links {
    display: flex;
    gap: 4px;
}

.nav-link {
    padding: 8px 14px;
    border-radius: 8px;
    text-decoration: none;
    color: var(--text-muted);
    font-size: 14px;
    font-weight: 500;
    transition: all 0.2s;
}

.nav-link:hover {
    background: var(--bg);
    color: var(--text);
}

.nav-link.active {
    background: rgba(59, 130, 246, 0.1);
    color: var(--primary);
}

/* 主内容 */
.main {
    min-height: calc(100vh - 60px);
}

.container {
    max-width: 860px;
    margin: 0 auto;
    padding: 40px 24px;
}

.container.narrow {
    max-width: 700px;
}

/* 首页 hero */
.hero {
    text-align: center;
    padding: 24px 0 40px;
}

.hero h1 {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 10px;
    background: linear-gradient(135deg, var(--primary), #8b5cf6);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero p {
    color: var(--text-muted);
    font-size: 15px;
}

/* 卡片 */
.card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 14px;
    overflow: hidden;
    margin-bottom: 20px;
}

.card-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--border);
    font-size: 15px;
    font-weight: 600;
}

.card-body {
    padding: 20px;
}

.link-card {
    display: block;
    text-decoration: none;
    color: var(--text);
    transition: all 0.2s;
}

.link-card:hover {
    border-color: var(--primary);
    background: var(--card-hover);
}

.grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.grid .card { margin-bottom: 20px; }

@media (max-width: 640px) {
    .grid { grid-template-columns: 1fr; }
}

/* 搜索框 */
.search-box {
    display: flex;
    gap: 10px;
}

.search-box input {
    flex: 1;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 14px 16px;
    color: var(--text);
    font-size: 14px;
    font-family: inherit;
    outline: none;
    transition: all 0.2s;
}

.search-box input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.search-box button {
    padding: 14px 24px;
    background: var(--primary);
    color: #fff;
    border: none;
    border-radius: 10px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    white-space: nowrap;
}

.search-box button:hover {
    background: var(--primary-hover);
}

/* 结果区 */
.loading-mask {
    display: none;
    text-align: center;
    padding: 20px;
    color: var(--text-muted);
}

.loading-mask.show { display: block; }

.result-card {
    margin-top: 20px;
    display: none;
}

.result-card.show { display: block; }

.result-cover {
    width: 100%;
    max-height: 300px;
    object-fit: cover;
    border-radius: 10px;
    margin-bottom: 16px;
}

.result-title {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 16px;
}

.video-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.video-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 16px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 10px;
}

.video-id {
    font-size: 13px;
    font-family: monospace;
    color: var(--text-muted);
}

.video-actions {
    display: flex;
    gap: 8px;
}

.btn-sm {
    padding: 8px 14px;
    border-radius: 8px;
    font-size: 12px;
    font-weight: 500;
    cursor: pointer;
    border: none;
    transition: all 0.2s;
}

.btn-copy {
    background: var(--card);
    border: 1px solid var(--border);
    color: var(--text);
}

.btn-copy:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.btn-play {
    background: var(--primary);
    color: #fff;
}

.btn-play:hover {
    background: var(--primary-hover);
}

.error-msg, .empty-msg {
    text-align: center;
    color: var(--error);
    padding: 20px;
}

.empty-msg { color: var(--text-muted); }

/* API 代码块 */
.code-block {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 12px 16px;
    margin-bottom: 10px;
    font-family: monospace;
    font-size: 13px;
    word-break: break-all;
}

.code-block span {
    display: block;
    color: var(--text-muted);
    font-size: 12px;
    margin-top: 4px;
}

/* Footer */
.footer {
    margin-top: 40px;
    padding: 24px 0;
    border-top: 1px solid var(--border);
    text-align: center;
    color: var(--text-muted);
    font-size: 14px;
}

@media (max-width: 640px) {
    .navbar-links .nav-link {
        padding: 8px 10px;
    }
    .container {
        padding: 24px 16px;
    }
    .search-box {
        flex-direction: column;
    }
    .search-box button {
        width: 100%;
    }
}