/* === CSS 变量 === */
:root {
    --bg-primary: #0f0f1a;
    --bg-secondary: #1a1a2e;
    --bg-card: #16213e;
    --bg-input: #1a1a2e;
    --text-primary: #e8e8e8;
    --text-secondary: #a0a0b0;
    --text-muted: #6b6b80;
    --accent: #6c63ff;
    --accent-hover: #5a52d5;
    --accent-glow: rgba(108, 99, 255, 0.3);
    --success: #4ecdc4;
    --danger: #ff6b6b;
    --border: #2a2a4a;
    --shadow: rgba(0, 0, 0, 0.3);
    --radius: 12px;
    --radius-sm: 8px;
    --transition: 0.3s ease;
}

/* === 全局样式 === */
* {
    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-primary);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
}

/* === 头部 === */
.header {
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-card) 100%);
    border-bottom: 1px solid var(--border);
    padding: 2rem 1rem;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 50% 0%, var(--accent-glow), transparent 70%);
    pointer-events: none;
}

.header-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
    margin: 0 auto;
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    margin-bottom: 0.5rem;
}

.logo-icon {
    font-size: 2.5rem;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

.logo h1 {
    font-size: 1.8rem;
    font-weight: 700;
    background: linear-gradient(135deg, #fff, var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* === 主内容 === */
.main-content {
    max-width: 900px;
    margin: 0 auto;
    padding: 1.5rem 1rem;
}

/* === 解析输入区 === */
.parse-section {
    margin-bottom: 2rem;
}

.input-group {
    display: flex;
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.input-group input {
    flex: 1;
    padding: 0.9rem 1.2rem;
    background: var(--bg-input);
    border: 2px solid var(--border);
    border-radius: var(--radius);
    color: var(--text-primary);
    font-size: 1rem;
    outline: none;
    transition: border-color var(--transition), box-shadow var(--transition);
}

.input-group input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.input-group input::placeholder {
    color: var(--text-muted);
}

.parse-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.9rem 1.8rem;
    background: linear-gradient(135deg, var(--accent), var(--accent-hover));
    color: white;
    border: none;
    border-radius: var(--radius);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: transform var(--transition), box-shadow var(--transition);
    white-space: nowrap;
}

.parse-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px var(--accent-glow);
}

.parse-btn:active {
    transform: translateY(0);
}

.parse-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.btn-icon {
    font-size: 0.85rem;
}

.tips {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.platform-tag {
    padding: 0.2rem 0.6rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 20px;
    font-size: 0.8rem;
    color: var(--text-secondary);
}

/* === 播放器 === */
.player-section {
    margin-bottom: 2rem;
    background: var(--bg-card);
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid var(--border);
    box-shadow: 0 8px 32px var(--shadow);
}

.player-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.8rem 1.2rem;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
}

.player-header h3 {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-secondary);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    max-width: 70%;
}

.player-actions {
    display: flex;
    gap: 0.5rem;
}

.action-btn {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 1rem;
    transition: all var(--transition);
}

.action-btn:hover {
    background: var(--accent);
    color: white;
    border-color: var(--accent);
}

.player-wrapper {
    position: relative;
    width: 100%;
    padding-bottom: 56.25%; /* 16:9 */
    background: #000;
}

.video-iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none;
}

/* === 加载动画 === */
.loading {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: #000;
    z-index: 10;
    gap: 1rem;
}

.loading p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.loading.hidden {
    display: none;
}

/* === 解析线路 === */
.line-section {
    margin-bottom: 2rem;
}

.line-section h3 {
    font-size: 1.05rem;
    margin-bottom: 0.8rem;
    color: var(--text-primary);
}

.line-list {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.line-item {
    padding: 0.6rem 1.2rem;
    background: var(--bg-card);
    border: 2px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition);
    font-size: 0.9rem;
}

.line-item:hover {
    border-color: var(--accent);
    color: var(--text-primary);
}

.line-item.active {
    background: var(--accent);
    border-color: var(--accent);
    color: white;
    font-weight: 600;
}

/* === 观看记录 === */
.history-section {
    margin-bottom: 2rem;
}

.history-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.history-header h3 {
    font-size: 1.05rem;
    color: var(--text-primary);
}

.clear-btn {
    padding: 0.4rem 1rem;
    background: transparent;
    border: 1px solid var(--danger);
    border-radius: var(--radius-sm);
    color: var(--danger);
    font-size: 0.85rem;
    cursor: pointer;
    transition: all var(--transition);
}

.clear-btn:hover {
    background: var(--danger);
    color: white;
}

.history-list {
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}

.empty-history {
    text-align: center;
    padding: 2.5rem 1rem;
    color: var(--text-muted);
}

.empty-history span {
    font-size: 2.5rem;
    display: block;
    margin-bottom: 0.5rem;
}

.empty-history p {
    font-size: 0.95rem;
}

/* 历史记录项 */
.history-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.9rem 1.2rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition);
    gap: 1rem;
}

.history-item:hover {
    border-color: var(--accent);
    transform: translateX(4px);
    box-shadow: 0 4px 12px var(--shadow);
}

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

.history-url {
    font-size: 0.9rem;
    color: var(--text-primary);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    margin-bottom: 0.25rem;
}

.history-meta {
    display: flex;
    gap: 1rem;
    font-size: 0.8rem;
    color: var(--text-muted);
}

.history-platform {
    color: var(--success);
    font-weight: 500;
}

.history-actions {
    display: flex;
    gap: 0.4rem;
    flex-shrink: 0;
}

.history-btn {
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 0.85rem;
    transition: all var(--transition);
}

.history-btn:hover {
    color: var(--accent);
    border-color: var(--accent);
}

.history-btn.delete:hover {
    color: var(--danger);
    border-color: var(--danger);
}

/* === Toast === */
.toast {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    padding: 0.8rem 1.5rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 0.9rem;
    box-shadow: 0 8px 24px var(--shadow);
    z-index: 1000;
    opacity: 0;
    transition: all 0.4s ease;
    pointer-events: none;
}

.toast.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

.toast.success {
    border-color: var(--success);
}

.toast.error {
    border-color: var(--danger);
}

/* === 底部 === */
.footer {
    text-align: center;
    padding: 1.5rem 1rem;
    color: var(--text-muted);
    font-size: 0.8rem;
    border-top: 1px solid var(--border);
}

/* === 响应式 === */
@media (max-width: 640px) {
    .header {
        padding: 1.5rem 1rem;
    }

    .logo h1 {
        font-size: 1.4rem;
    }

    .logo-icon {
        font-size: 2rem;
    }

    .input-group {
        flex-direction: column;
    }

    .parse-btn {
        justify-content: center;
    }

    .player-header h3 {
        font-size: 0.85rem;
    }

    .line-list {
        gap: 0.5rem;
    }

    .line-item {
        padding: 0.5rem 0.9rem;
        font-size: 0.85rem;
    }

    .history-item {
        padding: 0.75rem 1rem;
    }
}

/* === 滚动条美化 === */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

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

::-webkit-scrollbar-thumb:hover {
    background: var(--accent);
}