/* TikTok风格主题 */
:root {
    --tiktok-black: #121212;
    --tiktok-dark: #1A1A1A;
    --tiktok-gray: #2D2D2D;
    --tiktok-light-gray: #3E3E3E;
    --tiktok-white: #FFFFFF;
    --tiktok-text-gray: #A9A9A9;
    --tiktok-primary: #FF0050;
    --tiktok-secondary: #00F2EA;
    --tiktok-accent: #FFB800;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background-color: var(--tiktok-black);
    color: var(--tiktok-white);
    min-height: 100vh;
    line-height: 1.6;
}

/* 登录页面样式 */
.login-body {
    background: linear-gradient(135deg, #121212 0%, #1a1a1a 50%, #121212 100%);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background-image: 
        radial-gradient(circle at 20% 80%, rgba(255, 0, 80, 0.1) 0%, transparent 20%),
        radial-gradient(circle at 80% 20%, rgba(0, 242, 234, 0.1) 0%, transparent 20%);
}

.login-box {
    background: var(--tiktok-dark);
    border: 1px solid var(--tiktok-gray);
    border-radius: 16px;
    padding: 40px;
    width: 90%;
    max-width: 400px;
    box-shadow: 0 8px 32px rgba(255, 0, 80, 0.1);
    text-align: center;
    backdrop-filter: blur(10px);
}

.login-box h2 {
    color: var(--tiktok-white);
    margin-bottom: 30px;
    font-size: 24px;
    font-weight: 600;
    background: linear-gradient(90deg, var(--tiktok-primary), var(--tiktok-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.login-box input {
    width: 100%;
    padding: 14px;
    margin-bottom: 20px;
    border: 2px solid var(--tiktok-light-gray);
    border-radius: 8px;
    background: var(--tiktok-gray);
    color: var(--tiktok-white);
    font-size: 16px;
    transition: all 0.3s ease;
}

.login-box input:focus {
    outline: none;
    border-color: var(--tiktok-primary);
    box-shadow: 0 0 0 3px rgba(255, 0, 80, 0.1);
}

.login-box button {
    width: 100%;
    padding: 14px;
    background: linear-gradient(90deg, var(--tiktok-primary), var(--tiktok-secondary));
    border: none;
    border-radius: 8px;
    color: white;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.login-box button:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(255, 0, 80, 0.3);
}

/* 导航栏样式 */
.nav {
    background: var(--tiktok-dark);
    border-bottom: 1px solid var(--tiktok-gray);
    padding: 0 20px;
    display: flex;
    align-items: center;
    height: 60px;
    position: sticky;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(10px);
}

.nav::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, var(--tiktok-primary), var(--tiktok-secondary));
}

.nav a {
    color: var(--tiktok-text-gray);
    text-decoration: none;
    padding: 8px 16px;
    margin: 0 4px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.3s ease;
    position: relative;
}

.nav a:hover {
    color: var(--tiktok-white);
    background: var(--tiktok-gray);
}

.nav a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--tiktok-primary), var(--tiktok-secondary));
    transition: width 0.3s ease;
}

.nav a:hover::after {
    width: calc(100% - 32px);
}

/* 主容器样式 */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

/* 卡片样式 */
.card {
    background: var(--tiktok-dark);
    border: 1px solid var(--tiktok-gray);
    border-radius: 12px;
    padding: 24px;
    transition: all 0.3s ease;
}

.card:hover {
    transform: translateY(-4px);
    border-color: var(--tiktok-primary);
    box-shadow: 0 8px 32px rgba(255, 0, 80, 0.1);
}

.card h3 {
    color: var(--tiktok-white);
    margin-bottom: 16px;
    font-size: 18px;
    font-weight: 600;
}

/* 表单样式 */
.form-group {
    margin-bottom: 20px;
}

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

.form-control {
    width: 100%;
    padding: 12px;
    background: var(--tiktok-gray);
    border: 2px solid var(--tiktok-light-gray);
    border-radius: 8px;
    color: var(--tiktok-white);
    font-size: 14px;
    transition: all 0.3s ease;
}

.form-control:focus {
    outline: none;
    border-color: var(--tiktok-primary);
    box-shadow: 0 0 0 3px rgba(255, 0, 80, 0.1);
}

/* 按钮样式 */
.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-primary {
    background: linear-gradient(90deg, var(--tiktok-primary), var(--tiktok-secondary));
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(255, 0, 80, 0.3);
}

.btn-secondary {
    background: var(--tiktok-gray);
    color: var(--tiktok-white);
    border: 1px solid var(--tiktok-light-gray);
}

.btn-secondary:hover {
    background: var(--tiktok-light-gray);
    border-color: var(--tiktok-primary);
}

/* 表格样式 */
.table-container {
    background: var(--tiktok-dark);
    border: 1px solid var(--tiktok-gray);
    border-radius: 12px;
    overflow: hidden;
    margin-top: 20px;
}

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

th {
    background: var(--tiktok-gray);
    padding: 16px;
    text-align: left;
    font-weight: 600;
    font-size: 14px;
    color: var(--tiktok-white);
    border-bottom: 1px solid var(--tiktok-light-gray);
}

td {
    padding: 16px;
    border-bottom: 1px solid var(--tiktok-gray);
    color: var(--tiktok-text-gray);
    font-size: 14px;
}

tr:hover {
    background: var(--tiktok-light-gray);
}

/* 徽章样式 */
.badge {
    display: inline-block;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 600;
}

.badge-success {
    background: rgba(0, 242, 234, 0.1);
    color: var(--tiktok-secondary);
}

.badge-warning {
    background: rgba(255, 184, 0, 0.1);
    color: var(--tiktok-accent);
}

/* 列表样式 */
.list-group {
    background: var(--tiktok-dark);
    border: 1px solid var(--tiktok-gray);
    border-radius: 12px;
    overflow: hidden;
}

.list-item {
    padding: 16px;
    border-bottom: 1px solid var(--tiktok-gray);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

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

.list-item:hover {
    background: var(--tiktok-light-gray);
}

/* 警告和提示框 */
.alert {
    padding: 16px;
    border-radius: 8px;
    margin: 20px 0;
}

.alert-warning {
    background: rgba(255, 184, 0, 0.1);
    border: 1px solid var(--tiktok-accent);
    color: var(--tiktok-accent);
}

.alert-success {
    background: rgba(0, 242, 234, 0.1);
    border: 1px solid var(--tiktok-secondary);
    color: var(--tiktok-secondary);
}

/* 页头样式 */
.page-header {
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--tiktok-gray);
}

.page-header h1 {
    font-size: 28px;
    font-weight: 700;
    background: linear-gradient(90deg, var(--tiktok-primary), var(--tiktok-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.page-header p {
    color: var(--tiktok-text-gray);
    margin-top: 8px;
    font-size: 14px;
}

/* 上传区域样式 */
.upload-area {
    border: 2px dashed var(--tiktok-light-gray);
    border-radius: 12px;
    padding: 40px;
    text-align: center;
    transition: all 0.3s ease;
    margin-bottom: 20px;
}

.upload-area:hover {
    border-color: var(--tiktok-primary);
    background: rgba(255, 0, 80, 0.05);
}

.upload-area.dragover {
    border-color: var(--tiktok-secondary);
    background: rgba(0, 242, 234, 0.05);
}

/* 统计卡片 */
.stats-card {
    background: var(--tiktok-dark);
    border-radius: 12px;
    padding: 24px;
    position: relative;
    overflow: hidden;
}

.stats-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--tiktok-primary), var(--tiktok-secondary));
}

.stats-card h3 {
    font-size: 14px;
    color: var(--tiktok-text-gray);
    margin-bottom: 8px;
}

.stats-card .number {
    font-size: 32px;
    font-weight: 700;
    background: linear-gradient(90deg, var(--tiktok-primary), var(--tiktok-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .container {
        padding: 15px;
    }
    
    .nav {
        flex-wrap: wrap;
        height: auto;
        padding: 10px;
    }
    
    .nav a {
        margin: 4px;
        font-size: 12px;
        padding: 6px 12px;
    }
    
    .dashboard-grid {
        grid-template-columns: 1fr;
    }
    
    table {
        display: block;
        overflow-x: auto;
    }
}

/* 动画效果 */
@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}

.pulse {
    animation: pulse 2s infinite;
}