/* 管理后台样式 - 音乐人·音乐管理系统 */

/* 基础样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #1a73e8;
    --primary-hover: #1557b0;
    --danger-color: #ea4335;
    --danger-hover: #c5221f;
    --success-color: #34a853;
    --warning-color: #fbbc04;
    --text-color: #202124;
    --text-secondary: #5f6368;
    --border-color: #dadce0;
    --bg-light: #f8f9fa;
    --bg-white: #ffffff;
    --sidebar-bg: #1f2937;
    --sidebar-hover: #374151;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica', 'Arial', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-light);
}

/* 登录页面 */
.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.login-container {
    width: 100%;
    max-width: 400px;
    padding: 20px;
}

.login-box {
    background-color: var(--bg-white);
    border-radius: 12px;
    padding: 40px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
}

.login-box h1 {
    font-size: 24px;
    font-weight: 700;
    text-align: center;
    margin-bottom: 8px;
    color: var(--text-color);
}

.login-box h2 {
    font-size: 18px;
    font-weight: 500;
    text-align: center;
    margin-bottom: 32px;
    color: var(--text-secondary);
}

.back-link {
    text-align: center;
    margin-top: 20px;
}

.back-link a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
}

.back-link a:hover {
    color: var(--primary-color);
}

/* 管理页面布局 */
.admin-page {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.admin-header {
    background-color: var(--bg-white);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    max-width: 100%;
    margin: 0 auto;
    padding: 16px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.admin-header .logo {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-color);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

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

.btn-logout {
    background-color: var(--danger-color);
    color: white;
    padding: 8px 16px;
    border-radius: 6px;
    text-decoration: none;
    font-size: 14px;
    transition: background-color 0.2s;
}

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

/* 侧边栏 + 内容区 */
.admin-container {
    display: flex;
    flex: 1;
}

.admin-sidebar {
    width: 240px;
    background-color: var(--sidebar-bg);
    padding: 24px 0;
    position: sticky;
    top: 65px;
    height: calc(100vh - 65px);
    overflow-y: auto;
}

.sidebar-nav {
    display: flex;
    flex-direction: column;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 24px;
    color: #d1d5db;
    text-decoration: none;
    transition: all 0.2s;
    font-size: 15px;
}

.nav-item:hover {
    background-color: var(--sidebar-hover);
    color: white;
}

.nav-item.active {
    background-color: var(--sidebar-hover);
    color: white;
    border-left: 3px solid var(--primary-color);
}

.nav-icon {
    font-size: 20px;
}

/* 主内容区 */
.admin-content {
    flex: 1;
    padding: 40px;
    max-width: 1400px;
    margin: 0 auto;
    width: 100%;
}

.admin-content h1 {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 32px;
}

/* 仪表盘 */
.dashboard-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 24px;
    margin-bottom: 40px;
}

.stat-card {
    background-color: var(--bg-white);
    border-radius: 12px;
    padding: 32px;
    box-shadow: var(--shadow-sm);
}

.stat-card h3 {
    font-size: 16px;
    color: var(--text-secondary);
    margin-bottom: 12px;
}

.stat-number {
    font-size: 36px;
    font-weight: 700;
    color: var(--primary-color);
}

.quick-actions {
    background-color: var(--bg-white);
    border-radius: 12px;
    padding: 32px;
    box-shadow: var(--shadow-sm);
}

.quick-actions h2 {
    font-size: 24px;
    margin-bottom: 20px;
}

.action-buttons {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

/* 内容区块 */
.content-section {
    background-color: var(--bg-white);
    border-radius: 12px;
    padding: 32px;
    box-shadow: var(--shadow-sm);
    margin-bottom: 32px;
}

.content-section h2 {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 24px;
}

/* 表单 */
.admin-form {
    max-width: 800px;
}

.form-group {
    margin-bottom: 24px;
}

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

.form-group input[type="text"],
.form-group input[type="url"],
.form-group input[type="password"],
.form-group input[type="file"],
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 14px;
    font-family: inherit;
    transition: border-color 0.2s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

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

.form-hint {
    display: block;
    margin-top: 6px;
    font-size: 12px;
    color: var(--text-secondary);
}

.current-avatar,
.current-file {
    margin-bottom: 12px;
    padding: 12px;
    background-color: var(--bg-light);
    border-radius: 6px;
}

.current-avatar img {
    max-width: 200px;
    max-height: 200px;
    border-radius: 8px;
    display: block;
    margin-top: 8px;
    box-shadow: var(--shadow-sm);
}

.form-actions {
    display: flex;
    gap: 12px;
    margin-top: 32px;
}

/* 按钮 */
.btn {
    display: inline-block;
    padding: 10px 24px;
    border-radius: 6px;
    font-weight: 500;
    text-decoration: none;
    transition: all 0.2s;
    border: none;
    cursor: pointer;
    font-size: 14px;
}

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

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

.btn-secondary {
    background-color: var(--bg-light);
    color: var(--text-color);
}

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

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

.btn-edit {
    background-color: var(--primary-color);
    color: white;
}

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

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

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

/* 数据表格 */
.data-table {
    width: 100%;
    border-collapse: collapse;
    background-color: var(--bg-white);
}

.data-table thead {
    background-color: var(--bg-light);
}

.data-table th {
    padding: 12px;
    text-align: left;
    font-weight: 600;
    color: var(--text-secondary);
    border-bottom: 2px solid var(--border-color);
    font-size: 14px;
}

.data-table td {
    padding: 12px;
    border-bottom: 1px solid var(--border-color);
}

.data-table tbody tr:hover {
    background-color: var(--bg-light);
}

.table-avatar {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    object-fit: cover;
}

.no-avatar {
    color: var(--text-secondary);
    font-size: 12px;
}

.description-cell {
    max-width: 300px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.action-cell {
    display: flex;
    gap: 8px;
}

/* 消息提示 */
.success-message,
.error-message,
.warning-message {
    padding: 12px 16px;
    border-radius: 6px;
    margin-bottom: 24px;
    font-size: 14px;
}

.success-message {
    background-color: #d1f2eb;
    color: #0f5132;
    border-left: 4px solid var(--success-color);
}

.error-message {
    background-color: #f8d7da;
    color: #842029;
    border-left: 4px solid var(--danger-color);
}

.warning-message {
    background-color: #fff3cd;
    color: #664d03;
    border-left: 4px solid var(--warning-color);
}

.warning-message a {
    color: var(--primary-color);
    text-decoration: underline;
}

.no-data {
    text-align: center;
    color: var(--text-secondary);
    padding: 40px;
    font-size: 16px;
}

/* 响应式设计 */
@media (max-width: 968px) {
    .admin-container {
        flex-direction: column;
    }
    
    .admin-sidebar {
        width: 100%;
        height: auto;
        position: relative;
        top: 0;
    }
    
    .sidebar-nav {
        flex-direction: row;
        overflow-x: auto;
    }
    
    .nav-item {
        flex-shrink: 0;
    }
    
    .admin-content {
        padding: 20px;
    }
    
    .dashboard-stats {
        grid-template-columns: 1fr;
    }
    
    .data-table {
        font-size: 12px;
    }
    
    .action-cell {
        flex-direction: column;
    }
}