/* ========================================
   AI 网址导航 - 样式表
   配色方案：午夜紫、电蓝、柔白
   ======================================== */

:root {
    /* 主色系 */
    --color-midnight-purple: #2d1b4e;
    --color-electric-blue: #0066ff;
    --color-soft-white: #f8f9fa;
    --color-light-gray: #e8eaed;
    --color-dark-gray: #5f6368;
    --color-text-dark: #202124;
    
    /* 夜间模式色系 */
    --color-dark-bg: #0f0f0f;
    --color-dark-card: #1a1a1a;
    --color-dark-text: #e8e8e8;
    --color-dark-border: #2a2a2a;
    
    /* 功能色 */
    --color-success: #34a853;
    --color-error: #d33b27;
    --color-warning: #fbbc04;
    
    /* 当前主题变量 */
    --bg-primary: var(--color-soft-white);
    --bg-secondary: #ffffff;
    --text-primary: var(--color-text-dark);
    --text-secondary: var(--color-dark-gray);
    --border-color: var(--color-light-gray);
    --card-shadow: 0 1px 3px rgba(0, 0, 0, 0.12), 0 1px 2px rgba(0, 0, 0, 0.24);
    --card-shadow-hover: 0 3px 6px rgba(0, 0, 0, 0.16), 0 3px 6px rgba(0, 0, 0, 0.23);
}

body.dark-mode {
    --bg-primary: var(--color-dark-bg);
    --bg-secondary: var(--color-dark-card);
    --text-primary: var(--color-dark-text);
    --text-secondary: #b0b0b0;
    --border-color: var(--color-dark-border);
    --card-shadow: 0 1px 3px rgba(0, 0, 0, 0.3), 0 1px 2px rgba(0, 0, 0, 0.4);
    --card-shadow-hover: 0 3px 6px rgba(0, 0, 0, 0.4), 0 3px 6px rgba(0, 0, 0, 0.5);
}

/* ========================================
   全局样式
   ======================================== */

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    transition: background-color 0.3s ease, color 0.3s ease;
    line-height: 1.6;
}

/* ========================================
   容器布局
   ======================================== */

.app-container {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.main-container {
    display: flex;
    flex: 1;
    overflow: hidden;
}

/* ========================================
   顶部导航栏
   ======================================== */

.header {
    background: linear-gradient(135deg, var(--color-midnight-purple) 0%, #3d2563 100%);
    color: white;
    padding: 1rem 2rem;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: 0.5px;
}

.header-actions {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.btn-bookmark,
.btn-home,
.btn-theme {
    background: rgba(255, 255, 255, 0.2);
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.3);
    padding: 0.5rem 1rem;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.3s ease;
}

.btn-bookmark:hover,
.btn-home:hover,
.btn-theme:hover {
    background: rgba(255, 255, 255, 0.3);
    border-color: rgba(255, 255, 255, 0.5);
    transform: translateY(-2px);
}

/* ========================================
   侧边栏
   ======================================== */

.sidebar {
    width: 220px;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    overflow-y: auto;
    padding: 1.5rem 0;
    flex-shrink: 0;
}

.sidebar-header {
    padding: 0 1.5rem 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 1rem;
}

.sidebar-header h2 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}

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

.category-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    padding: 0 0.5rem;
}

.category-item {
    padding: 0.75rem 1rem;
    cursor: pointer;
    border-radius: 6px;
    transition: all 0.2s ease;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
}

.category-item:hover {
    background: var(--border-color);
}

.category-item.active {
    background: linear-gradient(135deg, var(--color-electric-blue) 0%, #0052cc 100%);
    color: white;
}

.category-item-name {
    flex: 1;
    font-weight: 500;
    font-size: 0.95rem;
}

.category-item-sort {
    font-size: 0.85rem;
    margin-left: 0.5rem;
    color: inherit;
}

.category-item-sort-box {
    display: flex;
    gap: 0.25rem;
    margin-left: 0.5rem;
}

.btn-sort {
    background: transparent;
    border: none;
    color: inherit;
    cursor: pointer;
    padding: 0.25rem 0.4rem;
    font-size: 0.85rem;
    border-radius: 3px;
    transition: all 0.2s ease;
}

.btn-sort:hover {
    background: rgba(0, 0, 0, 0.1);
}

.category-item.active .btn-sort:hover {
    background: rgba(255, 255, 255, 0.2);
}

.category-item-actions {
    display: none;
    gap: 0.3rem;
}

.category-item:hover .category-item-actions {
    display: flex;
}

.category-item.active .category-item-actions {
    display: flex;
}

.btn-small {
    background: transparent;
    border: none;
    color: inherit;
    cursor: pointer;
    padding: 0.25rem 0.5rem;
    font-size: 0.9rem;
    border-radius: 4px;
    transition: all 0.2s ease;
}

.btn-small:hover {
    background: rgba(0, 0, 0, 0.1);
}

.category-item.active .btn-small:hover {
    background: rgba(255, 255, 255, 0.2);
}

/* ========================================
   主内容区域
   ======================================== */

.content {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.content-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--bg-secondary);
    flex-shrink: 0;
}

.filter-buttons {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 0.5rem 1rem;
    border: 1px solid var(--border-color);
    background: transparent;
    color: var(--text-primary);
    border-radius: 20px;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.2s ease;
}

.filter-btn:hover {
    border-color: var(--color-electric-blue);
    color: var(--color-electric-blue);
}

.filter-btn.active {
    background: var(--color-electric-blue);
    color: white;
    border-color: var(--color-electric-blue);
}

.btn-add-url {
    padding: 0.5rem 1.2rem;
    background: var(--color-electric-blue);
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.3s ease;
}

.btn-add-url:hover {
    background: #0052cc;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 102, 255, 0.3);
}

/* ========================================
   URL 网格
   ======================================== */

.url-grid {
    flex: 1;
    overflow-y: auto;
    padding: 1.5rem;
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 1rem;
    align-content: start;
}

.url-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 0;
    cursor: grab;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    height: 84px;
}

.url-card:hover {
    box-shadow: var(--card-shadow-hover);
    border-color: var(--color-electric-blue);
    transform: translateY(-4px);
}

.url-card.dragging {
    opacity: 0.5;
    cursor: grabbing;
}

.url-card-icon-box {
    width: 84px;
    height: 84px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-electric-blue) 0%, #0052cc 100%);
    color: white;
    font-size: 2rem;
    flex-shrink: 0;
    border-radius: 12px 0 0 12px;
}

.url-card-content {
    flex: 1;
    padding: 0.75rem 1rem;
    display: flex;
    flex-direction: column;
    justify-content: center;
    min-width: 0;
}

.url-card-title {
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text-primary);
    margin-bottom: 0.2rem;
    word-break: break-word;
    line-height: 1.2;
    display: -webkit-box;
    -webkit-line-clamp: 1;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.url-card-desc {
    font-size: 0.75rem;
    color: var(--text-secondary);
    line-height: 1.1;
    display: -webkit-box;
    -webkit-line-clamp: 1;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.url-card-actions {
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    display: none;
    gap: 0.25rem;
}

.url-card:hover .url-card-actions {
    display: flex;
}

.btn-card-action {
    background: var(--color-electric-blue);
    color: white;
    border: none;
    border-radius: 4px;
    padding: 0.25rem 0.5rem;
    cursor: pointer;
    font-size: 0.75rem;
    font-weight: 600;
    transition: all 0.2s ease;
}

.btn-card-action:hover {
    background: #0052cc;
}

/* ========================================
   底部
   ======================================== */

.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: 1.5rem 2rem;
    flex-shrink: 0;
}

.footer-content {
    display: none;
}

.footer-contact {
    text-align: center;
    padding: 1rem 0;
    border-top: 1px solid var(--border-color);
    margin-top: 0;
}

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

.footer-contact a {
    color: var(--color-electric-blue);
    text-decoration: none;
    font-weight: 500;
}

.footer-contact a:hover {
    text-decoration: underline;
}

.btn-admin {
    padding: 0.3rem 0.8rem;
    background: transparent;
    border: 1px solid var(--color-electric-blue);
    color: var(--color-electric-blue);
    border-radius: 4px;
    cursor: pointer;
    font-weight: 600;
    font-size: 0.85rem;
    transition: all 0.3s ease;
    display: inline;
    margin: 0 0.5rem;
}

.btn-admin:hover {
    background: var(--color-electric-blue);
    color: white;
}

/* ========================================
   模态框
   ======================================== */

.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    animation: fadeIn 0.3s ease;
}

.modal.active {
    display: flex;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.modal-content {
    background: var(--bg-secondary);
    border-radius: 12px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
    max-width: 500px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    animation: slideUp 0.3s ease;
}

.modal-content.modal-small {
    max-width: 350px;
}

@keyframes slideUp {
    from {
        transform: translateY(20px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

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

.modal-header h3 {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-primary);
}

.btn-close {
    background: transparent;
    border: none;
    font-size: 1.5rem;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s ease;
}

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

.modal-body {
    padding: 1.5rem;
}

.form-group {
    margin-bottom: 1.2rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.95rem;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 0.95rem;
    color: var(--text-primary);
    background: var(--bg-primary);
    font-family: inherit;
    transition: all 0.2s ease;
}

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

.form-group textarea {
    resize: vertical;
    min-height: 80px;
}

.modal-footer {
    padding: 1.5rem;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
    gap: 1rem;
}

/* ========================================
   按钮样式
   ======================================== */

.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 600;
    font-size: 0.95rem;
    transition: all 0.3s ease;
}

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

.btn-primary:hover {
    background: #0052cc;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 102, 255, 0.3);
}

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

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

.btn-add-category {
    padding: 0.5rem 0.8rem;
    background: var(--color-electric-blue);
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.2s ease;
}

.btn-add-category:hover {
    background: #0052cc;
}

/* ========================================
   响应式设计
   ======================================== */

@media (max-width: 1200px) {
    .url-grid {
        grid-template-columns: repeat(4, 1fr);
        gap: 0.8rem;
    }
}

@media (max-width: 992px) {
    .url-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 0.8rem;
    }
}

@media (max-width: 768px) {
    .main-container {
        flex-direction: column;
    }

    .sidebar {
        width: 100%;
        border-right: none;
        border-bottom: 1px solid var(--border-color);
        padding: 1rem;
        max-height: 150px;
        overflow-x: auto;
        overflow-y: hidden;
    }

    .category-list {
        flex-direction: row;
        overflow-x: auto;
        padding-bottom: 0.5rem;
    }

    .category-item {
        white-space: nowrap;
        flex-shrink: 0;
    }

    .url-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 0.8rem;
        padding: 1rem;
    }

    .url-card {
        height: 70px;
    }

    .url-card-icon-box {
        width: 70px;
        height: 70px;
        font-size: 1.5rem;
        border-radius: 8px 0 0 8px;
    }

    .url-card-title {
        font-size: 0.85rem;
    }

    .url-card-desc {
        font-size: 0.7rem;
    }

    .header-content {
        flex-direction: column;
        gap: 1rem;
        align-items: flex-start;
    }

    .header-actions {
        width: 100%;
        justify-content: flex-start;
    }

    .footer-content {
        flex-direction: column;
        gap: 1rem;
        align-items: flex-start;
    }

    .content-header {
        flex-direction: column;
        gap: 1rem;
        align-items: flex-start;
    }

    .filter-buttons {
        width: 100%;
    }

    .btn-add-url {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .header {
        padding: 1rem;
    }

    .header-content {
        padding: 0;
    }

    .logo {
        font-size: 1.2rem;
    }

    .header-actions {
        gap: 0.5rem;
    }

    .btn-bookmark,
    .btn-home,
    .btn-theme {
        padding: 0.4rem 0.8rem;
        font-size: 0.8rem;
    }

    .sidebar {
        max-height: 120px;
    }

    .modal-content {
        width: 95%;
    }

    .url-grid {
        grid-template-columns: 1fr;
    }

    .url-card {
        height: 60px;
    }

    .url-card-icon-box {
        width: 60px;
        height: 60px;
        font-size: 1.2rem;
        border-radius: 6px 0 0 6px;
    }

    .url-card-content {
        padding: 0.5rem 0.75rem;
    }

    .url-card-title {
        font-size: 0.8rem;
    }

    .url-card-desc {
        font-size: 0.65rem;
    }
}

/* ========================================
   滚动条美化
   ======================================== */

::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-electric-blue);
}

/* ========================================
   打印样式
   ======================================== */

@media print {
    .header,
    .footer,
    .content-header,
    .btn-add-url,
    .url-card-actions {
        display: none;
    }
}