:root {
    --primary: #0066ff;
    --primary-dark: #0052cc;
    --primary-light: #4d94ff;
    --secondary: #00c6ff;
    --bg-dark: #0a1628;
    --bg-sidebar: #0d1b2a;
    --bg-card: #1b2838;
    --text-primary: #ffffff;
    --text-secondary: #8b9dc3;
    --border: #1e3a5f;
    --success: #00d084;
    --error: #ff4757;
    --warning: #ffa502;
}

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

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

/* 登录页面 */
.login-page {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: linear-gradient(135deg, var(--bg-dark) 0%, #001a33 100%);
    position: relative;
    overflow: hidden;
}

.login-page::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(0,102,255,0.1) 0%, transparent 70%);
    animation: pulse 15s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 0.5; }
    50% { transform: scale(1.1); opacity: 0.8; }
}

.login-container {
    background: var(--bg-card);
    padding: 40px;
    border-radius: 16px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.5);
    width: 100%;
    max-width: 420px;
    position: relative;
    z-index: 1;
    border: 1px solid var(--border);
}

.login-header {
    text-align: center;
    margin-bottom: 30px;
}

.login-header h1 {
    font-size: 24px;
    color: var(--primary);
    margin-bottom: 10px;
    font-weight: 600;
}

.login-header p {
    color: var(--text-secondary);
    font-size: 14px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
}

.form-control {
    width: 100%;
    padding: 12px 16px;
    background: var(--bg-dark);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 15px;
    transition: all 0.3s;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(0,102,255,0.1);
}

.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-size: 15px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
    width: 100%;
    box-shadow: 0 4px 15px rgba(0,102,255,0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0,102,255,0.4);
}

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

.btn-secondary {
    background: var(--bg-dark);
    color: var(--text-primary);
    border: 1px solid var(--border);
}

.btn-secondary:hover {
    background: var(--border);
}

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

.btn-sm {
    padding: 6px 12px;
    font-size: 13px;
}

/* 主布局 */
.app-container {
    display: flex;
    min-height: 100vh;
}

/* 侧边栏 */
.sidebar {
    width: 260px;
    background: var(--bg-sidebar);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    position: fixed;
    height: 100vh;
    overflow-y: auto;
    z-index: 100;
}

.sidebar-header {
    padding: 20px;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 18px;
}

.logo-text {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    line-height: 1.3;
}

.logo-text small {
    display: block;
    font-size: 12px;
    color: var(--text-secondary);
    font-weight: normal;
}

.sidebar-menu {
    flex: 1;
    padding: 20px 0;
}

.menu-section {
    margin-bottom: 24px;
}

.menu-title {
    padding: 0 20px;
    font-size: 11px;
    text-transform: uppercase;
    color: var(--text-secondary);
    letter-spacing: 1px;
    margin-bottom: 8px;
    font-weight: 600;
}

.menu-item {
    padding: 12px 20px;
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--text-secondary);
    text-decoration: none;
    transition: all 0.3s;
    cursor: pointer;
    border-left: 3px solid transparent;
}

.menu-item:hover {
    background: rgba(0,102,255,0.1);
    color: var(--text-primary);
}

.menu-item.active {
    background: rgba(0,102,255,0.15);
    color: var(--primary);
    border-left-color: var(--primary);
}

.menu-item i {
    width: 20px;
    text-align: center;
    font-size: 16px;
}

.submenu {
    display: none;
    background: rgba(0,0,0,0.2);
}

.submenu .menu-item {
    padding-left: 52px;
    font-size: 14px;
}

.menu-item.has-submenu.active + .submenu {
    display: block;
}

.sidebar-footer {
    padding: 20px;
    border-top: 1px solid var(--border);
}

.user-info {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
}

.user-avatar {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 14px;
}

.user-details {
    flex: 1;
}

.user-name {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
}

.user-role {
    font-size: 12px;
    color: var(--text-secondary);
}

.logout-btn {
    width: 100%;
    padding: 10px;
    background: transparent;
    border: 1px solid var(--error);
    color: var(--error);
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.3s;
    font-size: 13px;
}

.logout-btn:hover {
    background: var(--error);
    color: white;
}

.copyright {
    font-size: 11px;
    color: var(--text-secondary);
    text-align: center;
    margin-top: 12px;
}

/* 主内容区 */
.main-content {
    flex: 1;
    margin-left: 260px;
    padding: 24px;
    background: var(--bg-dark);
    min-height: 100vh;
}

.page-header {
    margin-bottom: 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.page-title {
    font-size: 28px;
    font-weight: 600;
    color: var(--text-primary);
}

.breadcrumb {
    display: flex;
    gap: 8px;
    color: var(--text-secondary);
    font-size: 14px;
}

.breadcrumb a {
    color: var(--primary);
    text-decoration: none;
}

.breadcrumb a:hover {
    text-decoration: underline;
}

/* 卡片 */
.card {
    background: var(--bg-card);
    border-radius: 12px;
    border: 1px solid var(--border);
    overflow: hidden;
    margin-bottom: 24px;
}

.card-header {
    padding: 20px;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.card-title {
    font-size: 18px;
    font-weight: 600;
}

.card-body {
    padding: 20px;
}

/* 统计卡片 */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 20px;
    margin-bottom: 24px;
}

.stat-card {
    background: var(--bg-card);
    padding: 24px;
    border-radius: 12px;
    border: 1px solid var(--border);
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--primary);
}

.stat-value {
    font-size: 32px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.stat-label {
    color: var(--text-secondary);
    font-size: 14px;
}

.stat-change {
    font-size: 13px;
    margin-top: 8px;
    display: flex;
    align-items: center;
    gap: 4px;
}

.stat-change.positive {
    color: var(--success);
}

.stat-change.negative {
    color: var(--error);
}

/* 表格 */
.table-container {
    overflow-x: auto;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
}

.data-table th,
.data-table td {
    padding: 14px 16px;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

.data-table th {
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.data-table tbody tr:hover {
    background: rgba(0,102,255,0.05);
}

.status-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 500;
}

.status-badge::before {
    content: '';
    width: 6px;
    height: 6px;
    border-radius: 50%;
}

.status-live {
    background: rgba(0,208,132,0.15);
    color: var(--success);
}

.status-live::before {
    background: var(--success);
    animation: blink 2s infinite;
}

.status-pending {
    background: rgba(255,165,2,0.15);
    color: var(--warning);
}

.status-pending::before {
    background: var(--warning);
}

.status-ended {
    background: rgba(139,157,195,0.15);
    color: var(--text-secondary);
}

.status-ended::before {
    background: var(--text-secondary);
}

@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

/* 表单 */
.form-row {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group.full-width {
    grid-column: 1 / -1;
}

label {
    display: block;
    margin-bottom: 8px;
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
}

input[type="text"],
input[type="password"],
input[type="datetime-local"],
textarea,
select {
    width: 100%;
    padding: 12px 16px;
    background: var(--bg-dark);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 15px;
    transition: all 0.3s;
}

input:focus,
textarea:focus,
select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(0,102,255,0.1);
}

textarea {
    resize: vertical;
    min-height: 100px;
}

/* 提示框 */
.alert {
    padding: 16px;
    border-radius: 8px;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.alert-success {
    background: rgba(0,208,132,0.15);
    border: 1px solid rgba(0,208,132,0.3);
    color: var(--success);
}

.alert-error {
    background: rgba(255,71,87,0.15);
    border: 1px solid rgba(255,71,87,0.3);
    color: var(--error);
}

/* 直播播放器 */
.live-player {
    width: 100%;
    aspect-ratio: 16/9;
    background: #000;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.live-player video {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.player-overlay {
    position: absolute;
    top: 16px;
    right: 16px;
    background: rgba(255,71,87,0.9);
    color: white;
    padding: 4px 12px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 6px;
    animation: pulse 2s infinite;
}

/* URL显示框 */
.url-box {
    background: var(--bg-dark);
    padding: 16px;
    border-radius: 8px;
    border: 1px solid var(--border);
    font-family: 'Courier New', monospace;
    font-size: 13px;
    word-break: break-all;
    position: relative;
    margin-top: 8px;
}

.url-box button {
    position: absolute;
    top: 8px;
    right: 8px;
    padding: 4px 12px;
    font-size: 12px;
}

/* 响应式 */
@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
        transition: transform 0.3s;
    }
    
    .sidebar.open {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
}

/* 加载动画 */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255,255,255,0.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 1s ease-in-out infinite;
}

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

/* 模态框 */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.8);
    z-index: 1000;
    justify-content: center;
    align-items: center;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: var(--bg-card);
    border-radius: 12px;
    width: 90%;
    max-width: 600px;
    max-height: 90vh;
    overflow-y: auto;
    border: 1px solid var(--border);
}

.modal-header {
    padding: 20px;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-body {
    padding: 20px;
}

.modal-footer {
    padding: 20px;
    border-top: 1px solid var(--border);
    display: flex;
    justify-content: flex-end;
    gap: 12px;
}

.close-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 24px;
    cursor: pointer;
}

.close-btn:hover {
    color: var(--text-primary);
}