/* ============================================
   全局样式和变量定义
   ============================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* 主色调 - 现代蓝紫色渐变 */
    --primary-color: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --secondary-color: #8b5cf6;
    --accent-color: #ec4899;
    
    /* 背景色 */
    --bg-color: #f8fafc;
    --bg-secondary: #f1f5f9;
    --card-bg: #ffffff;
    --card-hover: #fafbfc;
    
    /* 文字颜色 */
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-light: #94a3b8;
    --text-white: #ffffff;
    
    /* 边框和分割线 */
    --border-color: #e2e8f0;
    --border-light: #f1f5f9;
    
    /* 状态颜色 */
    --success-color: #10b981;
    --success-bg: #d1fae5;
    --error-color: #ef4444;
    --error-bg: #fee2e2;
    --warning-color: #f59e0b;
    --warning-bg: #fef3c7;
    --info-color: #3b82f6;
    --info-bg: #dbeafe;
    
    /* 阴影 */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    
    /* 圆角 */
    --radius-sm: 6px;
    --radius: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;
    
    /* 过渡动画 */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 
                 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    background-attachment: fixed;
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.page {
    min-height: 100vh;
}

/* ============================================
   登录页面 - 全新设计
   ============================================ */
.login-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 20px;
    position: relative;
    overflow: hidden;
}

.login-container::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 1px, transparent 1px);
    background-size: 50px 50px;
    animation: float 20s infinite linear;
}

@keyframes float {
    0% { transform: translate(0, 0); }
    100% { transform: translate(50px, 50px); }
}

.login-box {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    padding: 48px;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    width: 100%;
    max-width: 480px;
    position: relative;
    z-index: 1;
    border: 1px solid rgba(255, 255, 255, 0.2);
    animation: slideUp 0.5s ease-out;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.logo-header {
    text-align: center;
    margin-bottom: 32px;
}

.login-logo {
    max-width: 140px;
    height: auto;
    margin-bottom: 16px;
    filter: drop-shadow(0 4px 6px rgba(0, 0, 0, 0.1));
    animation: logoFloat 3s ease-in-out infinite;
}

@keyframes logoFloat {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.logo {
    text-align: center;
    margin-bottom: 8px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-size: 28px;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.header-logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.header-logo-img {
    height: 40px;
    width: auto;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.1));
}

.logo-small {
    font-size: 20px;
    font-weight: 600;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.login-tabs {
    display: flex;
    gap: 8px;
    margin-bottom: 32px;
    background: var(--bg-secondary);
    padding: 4px;
    border-radius: var(--radius-md);
}

.tab-btn {
    flex: 1;
    padding: 12px 24px;
    border: none;
    background: transparent;
    cursor: pointer;
    font-size: 15px;
    font-weight: 500;
    color: var(--text-secondary);
    border-radius: var(--radius);
    transition: var(--transition);
    position: relative;
}

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

.tab-btn.active {
    color: var(--text-white);
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    box-shadow: var(--shadow-md);
}

.auth-form {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.form-group input,
.form-group textarea,
.form-group select {
    padding: 14px 16px;
    border: 2px solid var(--border-color);
    border-radius: var(--radius);
    font-size: 15px;
    transition: var(--transition);
    background: var(--card-bg);
    color: var(--text-primary);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.form-group input::placeholder {
    color: var(--text-light);
}

/* ============================================
   按钮样式 - 现代化设计
   ============================================ */
.btn {
    padding: 14px 28px;
    border: none;
    border-radius: var(--radius);
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn:hover::before {
    width: 300px;
    height: 300px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--text-white);
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

.btn-secondary {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 2px solid var(--border-color);
}

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

.btn-icon {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    border: none;
    background: var(--bg-secondary);
    cursor: pointer;
    font-size: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    color: var(--text-primary);
}

.btn-icon:hover {
    background: var(--primary-color);
    color: var(--text-white);
    transform: scale(1.1);
    box-shadow: var(--shadow-md);
}

/* ============================================
   消息提示
   ============================================ */
.message {
    padding: 14px 18px;
    border-radius: var(--radius);
    font-size: 14px;
    margin-top: 16px;
    display: flex;
    align-items: center;
    gap: 10px;
    animation: slideIn 0.3s ease-out;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(-10px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.message.success {
    background: var(--success-bg);
    color: var(--success-color);
    border: 1px solid rgba(16, 185, 129, 0.2);
}

.message.error {
    background: var(--error-bg);
    color: var(--error-color);
    border: 1px solid rgba(239, 68, 68, 0.2);
}

/* ============================================
   主页面头部
   ============================================ */
.header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    padding: 16px 32px;
    box-shadow: var(--shadow);
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 1px solid var(--border-light);
}

.header-left,
.header-center,
.header-right {
    flex: 1;
    display: flex;
    align-items: center;
}

.header-center {
    justify-content: center;
}

.header-right {
    justify-content: flex-end;
    gap: 16px;
}

.search-input {
    padding: 12px 20px;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-full);
    width: 100%;
    max-width: 450px;
    font-size: 14px;
    background: var(--bg-secondary);
    transition: var(--transition);
}

.search-input:focus {
    outline: none;
    border-color: var(--primary-color);
    background: var(--card-bg);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.user-info {
    display: flex;
    align-items: center;
    gap: 12px;
    position: relative;
}

.user-menu {
    position: relative;
}

.dropdown {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    background: var(--card-bg);
    box-shadow: var(--shadow-lg);
    border-radius: var(--radius-md);
    min-width: 180px;
    z-index: 1000;
    border: 1px solid var(--border-light);
    overflow: hidden;
    animation: dropdownSlide 0.2s ease-out;
}

@keyframes dropdownSlide {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.dropdown a {
    display: block;
    padding: 12px 18px;
    color: var(--text-primary);
    text-decoration: none;
    transition: var(--transition);
    font-size: 14px;
}

.dropdown a:hover {
    background: var(--bg-secondary);
    color: var(--primary-color);
}

.dropdown a:first-child {
    border-top-left-radius: var(--radius-md);
    border-top-right-radius: var(--radius-md);
}

.dropdown a:last-child {
    border-bottom-left-radius: var(--radius-md);
    border-bottom-right-radius: var(--radius-md);
}

/* ============================================
   主内容区
   ============================================ */
.main-container {
    display: flex;
    max-width: 1600px;
    margin: 0 auto;
    padding: 32px;
    gap: 32px;
}

/* ============================================
   侧边栏 - 现代化设计
   ============================================ */
.sidebar {
    width: 240px;
    background: var(--card-bg);
    padding: 24px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    height: fit-content;
    position: sticky;
    top: 100px;
    border: 1px solid var(--border-light);
}

.sidebar h3 {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 20px;
    color: var(--text-primary);
    padding-bottom: 12px;
    border-bottom: 2px solid var(--border-light);
}

.category-list {
    list-style: none;
}

.category-item {
    display: block;
    padding: 12px 16px;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: var(--radius);
    margin-bottom: 6px;
    transition: var(--transition);
    font-size: 14px;
    font-weight: 500;
    position: relative;
}

.category-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 0;
    background: var(--primary-color);
    border-radius: 0 2px 2px 0;
    transition: var(--transition);
}

.category-item:hover {
    background: var(--bg-secondary);
    color: var(--primary-color);
    padding-left: 20px;
}

.category-item:hover::before {
    height: 60%;
}

.category-item.active {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1), rgba(139, 92, 246, 0.1));
    color: var(--primary-color);
    font-weight: 600;
    padding-left: 20px;
}

.category-item.active::before {
    height: 60%;
}

/* ============================================
   工具卡片 - 精美设计
   ============================================ */
.content {
    flex: 1;
}

.tool-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 24px;
}

.tool-card {
    background: var(--card-bg);
    padding: 28px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    cursor: pointer;
    transition: var(--transition);
    border: 1px solid var(--border-light);
    position: relative;
    overflow: hidden;
}

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

.tool-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
    border-color: var(--primary-color);
}

.tool-card:hover::before {
    transform: scaleX(1);
}

.tool-icon {
    font-size: 56px;
    margin-bottom: 16px;
    display: inline-block;
    transition: var(--transition);
}

.tool-card:hover .tool-icon {
    transform: scale(1.1) rotate(5deg);
}

.tool-logo {
    width: 72px;
    height: 72px;
    object-fit: contain;
    margin-bottom: 16px;
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.tool-card:hover .tool-logo {
    transform: scale(1.05);
    box-shadow: var(--shadow-md);
}

.tool-name {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 10px;
    color: var(--text-primary);
    line-height: 1.3;
}

.tool-description {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 16px;
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.tool-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 12px;
    color: var(--text-light);
    padding-top: 16px;
    border-top: 1px solid var(--border-light);
}

.tool-category {
    background: var(--bg-secondary);
    padding: 6px 12px;
    border-radius: var(--radius-full);
    font-weight: 500;
    color: var(--text-secondary);
}

.tool-version {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--text-white);
    padding: 6px 12px;
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: 11px;
    letter-spacing: 0.5px;
}

.empty-state {
    text-align: center;
    padding: 80px 20px;
    color: var(--text-light);
}

.empty-state::before {
    content: '🔍';
    font-size: 64px;
    display: block;
    margin-bottom: 16px;
    opacity: 0.5;
}

/* ============================================
   模态框 - 现代化设计
   ============================================ */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(15, 23, 42, 0.6);
    backdrop-filter: blur(4px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    animation: fadeIn 0.2s ease-out;
}

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

.modal-content {
    background: var(--card-bg);
    border-radius: var(--radius-xl);
    width: 90%;
    max-width: 600px;
    max-height: 90vh;
    overflow: hidden;
    box-shadow: var(--shadow-xl);
    animation: modalSlide 0.3s ease-out;
    border: 1px solid var(--border-light);
}

@keyframes modalSlide {
    from {
        opacity: 0;
        transform: scale(0.95) translateY(-20px);
    }
    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

.modal-large {
    max-width: 1000px;
}

.modal-header {
    padding: 24px 32px;
    border-bottom: 1px solid var(--border-light);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.05), rgba(139, 92, 246, 0.05));
}

.modal-header h2 {
    font-size: 22px;
    font-weight: 700;
    color: var(--text-primary);
}

.btn-close {
    background: var(--bg-secondary);
    border: none;
    font-size: 20px;
    cursor: pointer;
    color: var(--text-secondary);
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-full);
    transition: var(--transition);
}

.btn-close:hover {
    background: var(--error-bg);
    color: var(--error-color);
    transform: rotate(90deg);
}

.modal-body {
    padding: 32px;
    overflow-y: auto;
    max-height: calc(90vh - 100px);
}

.modal-body iframe {
    width: 100%;
    height: 600px;
    border: none;
    border-radius: var(--radius);
}

/* ============================================
   通知提示
   ============================================ */
.notification {
    position: fixed;
    top: 24px;
    right: 24px;
    background: var(--warning-color);
    color: white;
    padding: 16px 24px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: 12px;
    z-index: 2000;
    max-width: 400px;
    animation: notificationSlide 0.3s ease-out;
}

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

/* ============================================
   管理后台
   ============================================ */
.admin-tabs {
    display: flex;
    gap: 8px;
    margin-bottom: 24px;
    background: var(--bg-secondary);
    padding: 4px;
    border-radius: var(--radius-md);
}

.admin-section {
    margin-top: 24px;
}

.admin-actions {
    margin-bottom: 24px;
}

.admin-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    background: var(--card-bg);
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 1px solid var(--border-light);
}

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

.admin-table th {
    background: var(--bg-secondary);
    font-weight: 600;
    color: var(--text-primary);
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.admin-table tr:last-child td {
    border-bottom: none;
}

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

.role-select {
    padding: 8px 12px;
    border: 2px solid var(--border-color);
    border-radius: var(--radius);
    font-size: 14px;
    background: var(--card-bg);
    cursor: pointer;
    transition: var(--transition);
}

.role-select:hover {
    border-color: var(--primary-color);
}

.role-select:disabled {
    background: var(--bg-secondary);
    cursor: not-allowed;
    opacity: 0.6;
}

.info-item {
    display: flex;
    padding: 16px 0;
    border-bottom: 1px solid var(--border-light);
    align-items: center;
}

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

.info-item label {
    font-weight: 600;
    width: 140px;
    color: var(--text-secondary);
    font-size: 14px;
}

.info-item span {
    flex: 1;
    color: var(--text-primary);
}

.form-actions {
    display: flex;
    gap: 12px;
    margin-top: 24px;
    justify-content: flex-end;
}

/* ============================================
   响应式设计
   ============================================ */
@media (max-width: 1024px) {
    .tool-grid {
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
        gap: 20px;
    }
}

@media (max-width: 768px) {
    .main-container {
        flex-direction: column;
        padding: 20px;
        gap: 20px;
    }

    .sidebar {
        width: 100%;
        position: static;
    }

    .category-list {
        display: flex;
        flex-wrap: wrap;
        gap: 8px;
    }

    .category-item {
        margin-bottom: 0;
    }

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

    .header {
        flex-wrap: wrap;
        padding: 12px 20px;
    }

    .header-center {
        order: 3;
        width: 100%;
        margin-top: 12px;
    }

    .login-box {
        padding: 32px 24px;
    }

    .modal-content {
        width: 95%;
        max-height: 95vh;
    }

    .modal-header,
    .modal-body {
        padding: 20px;
    }
}

@media (max-width: 480px) {
    .logo {
        font-size: 22px;
    }

    .tool-card {
        padding: 20px;
    }

    .btn {
        padding: 12px 20px;
        font-size: 14px;
    }
}

/* ============================================
   滚动条美化
   ============================================ */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--text-light);
    border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}

/* ============================================
   加载动画
   ============================================ */
@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

.loading {
    animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}