/* CSS 变量定义 */
:root {
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-tertiary: #e9ecef;
    --text-primary: #212529;
    --text-secondary: #6c757d;
    --text-muted: #adb5bd;
    --accent-primary: #0d6efd;
    --accent-success: #198754;
    --accent-danger: #dc3545;
    --accent-warning: #ffc107;
    --border-color: #dee2e6;
    --shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --radius: 8px;
    --radius-lg: 12px;
    --radius-full: 9999px;
    --transition: all 0.3s ease;
}

/* 深色主题 */
[data-theme="dark"] {
    --bg-primary: #1a1a2e;
    --bg-secondary: #16213e;
    --bg-tertiary: #0f3460;
    --text-primary: #ffffff;
    --text-secondary: #a0aec0;
    --text-muted: #718096;
    --accent-primary: #63b3ed;
    --accent-success: #68d391;
    --accent-danger: #fc8181;
    --accent-warning: #f6ad55;
    --border-color: #4a5568;
    --shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.3);
}

/* 系统主题自动切换 */
@media (prefers-color-scheme: dark) {
    [data-theme="system"] {
        --bg-primary: #1a1a2e;
        --bg-secondary: #16213e;
        --bg-tertiary: #0f3460;
        --text-primary: #ffffff;
        --text-secondary: #a0aec0;
        --text-muted: #718096;
        --accent-primary: #63b3ed;
        --accent-success: #68d391;
        --accent-danger: #fc8181;
        --accent-warning: #f6ad55;
        --border-color: #4a5568;
        --shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
        --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.3);
    }
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* 导航栏 */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-left, .nav-right {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.nav-center {
    display: flex;
    gap: 2rem;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--accent-primary);
    text-decoration: none;
}

.admin-back {
    font-size: 1rem;
    color: var(--text-secondary);
}

.nav-link {
    text-decoration: none;
    color: var(--text-secondary);
    transition: var(--transition);
    padding: 0.5rem 1rem;
    border-radius: var(--radius);
}

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

/* 按钮样式 */
.btn {
    padding: 0.5rem 1rem;
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 500;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

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

.btn-primary:hover {
    opacity: 0.9;
}

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

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

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

.btn-danger:hover {
    opacity: 0.9;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* 用户菜单 */
.user-info {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.user-actions {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    margin-top: 0.5rem;
}

.user-actions .nav-link {
    padding: 0.25rem 0.5rem;
}

.user-actions .btn {
    width: 100%;
    justify-content: center;
}

/* 主内容区域 */
main {
    flex: 1;
    padding: 2rem;
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
}

/* 上传区域 */
.upload-container {
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
}

.upload-area {
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-lg);
    padding: 3rem;
    cursor: pointer;
    transition: var(--transition);
    margin-bottom: 1rem;
}

.upload-area:hover, .upload-area.dragover {
    border-color: var(--accent-primary);
    background-color: var(--bg-secondary);
}

.upload-icon {
    color: var(--text-muted);
    margin-bottom: 1rem;
}

.upload-area h2 {
    margin-bottom: 0.5rem;
}

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

/* 上传进度 */
.upload-progress {
    margin-top: 1rem;
}

.progress-bar {
    width: 100%;
    height: 8px;
    background-color: var(--bg-tertiary);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background-color: var(--accent-primary);
    transition: width 0.3s ease;
}

#progress-text {
    margin-top: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* 图库 */
.gallery-container {
    width: 100%;
}

.gallery-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.gallery-card {
    background-color: var(--bg-secondary);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.gallery-card:hover {
    box-shadow: var(--shadow-lg);
}

.gallery-card img {
    width: 100%;
    height: 150px;
    object-fit: cover;
}

.card-info {
    padding: 0.75rem;
}

.card-info p {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: 0.25rem;
}

.card-actions {
    display: flex;
    gap: 0.5rem;
    margin-top: 0.75rem;
}

.card-actions .btn {
    flex: 1;
    padding: 0.3rem 0.5rem;
    font-size: 0.75rem;
}

.empty-state {
    grid-column: 1 / -1;
    text-align: center;
    padding: 3rem;
    color: var(--text-muted);
}

.empty-state svg {
    margin-bottom: 1rem;
}

/* 分页 */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1rem;
}

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

/* 个人中心 */
.profile-container {
    max-width: 600px;
    margin: 0 auto;
}

.profile-header {
    text-align: center;
    margin-bottom: 2rem;
}

.profile-content {
    background-color: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: 2rem;
}

.profile-section {
    margin-bottom: 2rem;
}

.profile-section:last-child {
    margin-bottom: 0;
}

.profile-section h3 {
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border-color);
}

.info-item {
    display: flex;
    justify-content: space-between;
    padding: 0.5rem 0;
}

.danger-zone {
    border: 1px solid var(--accent-danger);
    border-radius: var(--radius);
    padding: 1.5rem;
}

.danger-zone h3 {
    color: var(--accent-danger);
    border-bottom-color: var(--accent-danger);
}

.pending-text {
    color: var(--accent-warning);
    margin-bottom: 1rem;
}

/* 表单 */
.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.form-input {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-size: 0.9rem;
    transition: var(--transition);
}

.form-input:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(13, 110, 253, 0.2);
}

.form-textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-size: 0.9rem;
    min-height: 300px;
    resize: vertical;
    font-family: inherit;
}

.form-textarea:focus {
    outline: none;
    border-color: var(--accent-primary);
}

.code-input-group {
    display: flex;
    gap: 0.5rem;
}

.code-input-group .form-input {
    flex: 1;
}

/* 认证表单标签 */
.auth-tabs {
    display: flex;
    margin-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.auth-tab {
    flex: 1;
    padding: 0.75rem;
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 0.95rem;
    border-bottom: 2px solid transparent;
    transition: all 0.2s ease;
}

.auth-tab:hover {
    color: var(--text-primary);
}

.auth-tab.active {
    color: var(--accent-primary);
    border-bottom-color: var(--accent-primary);
}

/* 认证表单 */
.auth-form {
    display: none;
}

.auth-form.active {
    display: block;
}

/* 管理员表格 */
.table-container {
    overflow-x: auto;
    margin-bottom: 1rem;
}

.admin-table {
    width: 100%;
    border-collapse: collapse;
    background-color: var(--bg-secondary);
    border-radius: var(--radius);
    overflow: hidden;
}

.admin-table th, .admin-table td {
    padding: 0.75rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.admin-table th {
    background-color: var(--bg-tertiary);
    font-weight: 600;
}

.admin-table tr:hover {
    background-color: var(--bg-tertiary);
}

/* 设置表单 */
.settings-form {
    background-color: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: 2rem;
}

.settings-section {
    margin-bottom: 2rem;
}

.settings-section:last-child {
    margin-bottom: 1.5rem;
}

.settings-section h3 {
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border-color);
}

.radio-group {
    display: flex;
    gap: 2rem;
}

.radio-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
}

.page-select {
    width: auto;
    padding: 0.5rem;
}

.page-content {
    white-space: pre-wrap;
    line-height: 1.8;
}

/* 广告 */
.ad-container {
    position: fixed;
    top: 50%;
    transform: translateY(-50%);
    z-index: 50;
}

.ad-left {
    left: 1rem;
}

.ad-right {
    right: 1rem;
}

.ad-image {
    width: 120px;
    height: auto;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

/* 页脚 */
footer {
    background-color: var(--bg-secondary);
    padding: 1.5rem;
    text-align: center;
    border-top: 1px solid var(--border-color);
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 1rem;
}

.footer-link {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 0.9rem;
    transition: var(--transition);
}

.footer-link:hover {
    color: var(--text-primary);
}

.footer-copyright {
    color: var(--text-muted);
    font-size: 0.8rem;
}

/* 模态框 */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 200;
}

.modal {
    background-color: var(--bg-primary);
    border-radius: var(--radius-lg);
    width: 90%;
    max-width: 400px;
    max-height: 90vh;
    overflow: hidden;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-secondary);
}

.modal-body {
    padding: 1.5rem;
    max-height: 70vh;
    overflow-y: auto;
}

/* 提示框 */
.toast {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    background-color: var(--text-primary);
    color: var(--bg-primary);
    padding: 1rem 1.5rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    z-index: 300;
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(100%);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* 响应式设计 */
@media (max-width: 768px) {
    .navbar {
        flex-wrap: wrap;
        padding: 0.75rem 1rem;
    }

    .nav-center {
        order: 3;
        width: 100%;
        justify-content: center;
        margin-top: 0.75rem;
        padding-top: 0.75rem;
        border-top: 1px solid var(--border-color);
    }

    .gallery-grid {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    }

    .admin-table th, .admin-table td {
        padding: 0.5rem;
        font-size: 0.8rem;
    }

    .footer-links {
        flex-wrap: wrap;
        gap: 1rem;
    }

    .ad-container {
        display: none !important;
    }
}