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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    color: #333;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

/* 头部样式 */
.header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 16px;
    padding: 20px;
    margin-bottom: 20px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 15px;
}

.logo i {
    font-size: 2.5rem;
    color: #0088cc;
}

.logo h1 {
    font-size: 2rem;
    font-weight: 700;
    background: linear-gradient(135deg, #0088cc, #00c6ff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* 按钮样式 */
.btn {
    border: none;
    border-radius: 12px;
    padding: 12px 24px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
}

.btn-primary {
    background: linear-gradient(135deg, #0088cc, #00c6ff);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 136, 204, 0.3);
}

.btn-secondary {
    background: #f8f9fa;
    color: #6c757d;
    border: 1px solid #dee2e6;
}

.btn-secondary:hover {
    background: #e9ecef;
}

.btn-danger {
    background: linear-gradient(135deg, #dc3545, #ff6b7a);
    color: white;
}

.btn-danger:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(220, 53, 69, 0.3);
}

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

/* 统计卡片 */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.stat-card {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 16px;
    padding: 24px;
    display: flex;
    align-items: center;
    gap: 20px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.stat-card:hover {
    transform: translateY(-4px);
}

.stat-icon {
    width: 60px;
    height: 60px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    color: white;
}

.stat-card:nth-child(1) .stat-icon {
    background: linear-gradient(135deg, #0088cc, #00c6ff);
}

.stat-card:nth-child(2) .stat-icon {
    background: linear-gradient(135deg, #28a745, #20c997);
}

.stat-card:nth-child(3) .stat-icon {
    background: linear-gradient(135deg, #ffc107, #ffca2c);
}

.stat-card:nth-child(4) .stat-icon {
    background: linear-gradient(135deg, #6f42c1, #8e2de2);
}

.stat-content h3 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 4px;
    color: #2c3e50;
}

.stat-content p {
    color: #6c757d;
    font-weight: 500;
}

/* 搜索区域 */
.search-section {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 16px;
    padding: 20px;
    margin-bottom: 20px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    display: flex;
    gap: 20px;
    align-items: center;
    flex-wrap: wrap;
}

.search-box {
    position: relative;
    flex: 1;
    min-width: 300px;
}

.search-box i {
    position: absolute;
    left: 16px;
    top: 50%;
    transform: translateY(-50%);
    color: #6c757d;
}

.search-box input {
    width: 100%;
    padding: 12px 16px 12px 48px;
    border: 2px solid #e9ecef;
    border-radius: 12px;
    font-size: 14px;
    transition: border-color 0.3s ease;
}

.search-box input:focus {
    outline: none;
    border-color: #0088cc;
}

.filter-buttons {
    display: flex;
    gap: 8px;
}

.filter-btn {
    padding: 8px 16px;
    border: 2px solid #e9ecef;
    background: white;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
}

.filter-btn.active,
.filter-btn:hover {
    border-color: #0088cc;
    background: #0088cc;
    color: white;
}

/* Sessions容器 */
.sessions-container {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 16px;
    padding: 20px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    min-height: 400px;
}

.sessions-grid {
    display: grid;
    gap: 20px;
}

/* Session卡片 */
.session-card {
    background: white;
    border-radius: 12px;
    padding: 20px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    border-left: 4px solid #0088cc;
}

.session-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.session-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 16px;
}

.session-info h3 {
    font-size: 1.2rem;
    font-weight: 600;
    color: #2c3e50;
    margin-bottom: 4px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.session-info h3 i {
    color: #0088cc;
}

.session-info p {
    color: #6c757d;
    font-size: 14px;
}

/* 用户信息样式 */
.user-info {
    margin: 8px 0;
    padding: 8px 0;
    border-top: 1px solid #f0f0f0;
    border-bottom: 1px solid #f0f0f0;
}

.user-info p {
    margin: 4px 0;
    font-size: 13px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.user-info i {
    color: #28a745;
    width: 14px;
}

/* 安全信息样式 */
.security-info {
    display: flex;
    align-items: center;
    gap: 8px;
    margin: 8px 0;
    padding: 8px 12px;
    border-radius: 8px;
    font-size: 13px;
    font-weight: 500;
}

.security-info.has-2fa {
    background: linear-gradient(135deg, #d4edda 0%, #c3e6cb 100%);
    border: 1px solid #c3e6cb;
}

.security-info i {
    width: 16px;
    text-align: center;
}

.security-info .fas.fa-shield-alt {
    color: #28a745;
}

.security-info .fas.fa-unlock {
    color: #6c757d;
}

.security-text {
    font-weight: 500;
}

/* 有二级密码的卡片样式 */
.session-card.has-2fa {
    border-left-color: #28a745;
}

.session-card.has-2fa .security-info {
    background: linear-gradient(135deg, #d4edda 0%, #c3e6cb 100%);
    border: 1px solid #c3e6cb;
    color: #155724;
}

/* 无二级密码的卡片样式 */
.session-card.no-2fa .security-info {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    border: 1px solid #dee2e6;
    color: #6c757d;
}

.session-actions {
    display: flex;
    gap: 8px;
}

.action-btn {
    width: 36px;
    height: 36px;
    border: none;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 14px;
}

.action-btn.chat {
    background: #e8f5e8;
    color: #2e7d32;
}

.action-btn.view {
    background: #e3f2fd;
    color: #1976d2;
}

.action-btn.download {
    background: #fff3e0;
    color: #f57c00;
}

.action-btn.delete {
    background: #ffebee;
    color: #d32f2f;
}

.action-btn:hover {
    transform: scale(1.1);
}

.session-files {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 12px;
}

.file-item {
    background: #f8f9fa;
    border-radius: 8px;
    padding: 12px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.file-info {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.file-name {
    font-size: 13px;
    font-weight: 500;
    color: #2c3e50;
}

.file-meta {
    font-size: 11px;
    color: #6c757d;
}

.file-actions {
    display: flex;
    gap: 4px;
}

/* 加载状态 */
.loading {
    text-align: center;
    padding: 60px 20px;
    color: #6c757d;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid #f3f3f3;
    border-top: 4px solid #0088cc;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 20px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* 空状态 */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: #6c757d;
}

.empty-state i {
    font-size: 4rem;
    margin-bottom: 20px;
    opacity: 0.5;
}

.empty-state h3 {
    font-size: 1.5rem;
    margin-bottom: 10px;
    color: #495057;
}

/* 模态框 */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(5px);
}

.modal-content {
    background-color: white;
    margin: 5% auto;
    border-radius: 16px;
    width: 90%;
    max-width: 800px;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.3);
    animation: modalSlideIn 0.3s ease;
}

.modal-small {
    max-width: 450px;
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal-header {
    padding: 24px 24px 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: #2c3e50;
}

.modal-close {
    background: none;
    border: none;
    font-size: 2rem;
    cursor: pointer;
    color: #6c757d;
    padding: 0;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    transition: all 0.3s ease;
}

.modal-close:hover {
    background: #f8f9fa;
    color: #495057;
}

.modal-body {
    padding: 24px;
}

.modal-footer {
    padding: 0 24px 24px;
    display: flex;
    gap: 12px;
    justify-content: flex-end;
}

/* 文件信息 */
.file-info {
    margin-bottom: 24px;
}

.info-row {
    display: flex;
    justify-content: space-between;
    padding: 8px 0;
    border-bottom: 1px solid #f1f3f4;
}

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

.label {
    font-weight: 600;
    color: #495057;
}

/* 文件内容 */
.file-content {
    margin-top: 20px;
}

.content-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}

.content-header span {
    font-weight: 600;
    color: #495057;
}

.content-box {
    background: #f8f9fa;
    border-radius: 8px;
    padding: 16px;
    max-height: 300px;
    overflow-y: auto;
}

.content-box pre {
    margin: 0;
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    font-size: 13px;
    line-height: 1.4;
    word-wrap: break-word;
    white-space: pre-wrap;
}

/* 警告样式 */
.warning {
    color: #dc3545;
    font-weight: 500;
}

.filename {
    background: #f8f9fa;
    padding: 8px 12px;
    border-radius: 6px;
    font-family: monospace;
    font-size: 13px;
    color: #495057;
}

/* Toast通知 */
.toast {
    position: fixed;
    top: 20px;
    right: 20px;
    background: white;
    border-radius: 8px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
    padding: 16px 20px;
    z-index: 1001;
    transform: translateX(400px);
    transition: transform 0.3s ease;
}

.toast.show {
    transform: translateX(0);
}

.toast-content {
    display: flex;
    align-items: center;
    gap: 12px;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .container {
        padding: 10px;
    }
    
    .header-content {
        flex-direction: column;
        gap: 20px;
        text-align: center;
    }
    
    .logo h1 {
        font-size: 1.5rem;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .search-section {
        flex-direction: column;
        align-items: stretch;
    }
    
    .search-box {
        min-width: auto;
    }
    
    .filter-buttons {
        justify-content: center;
    }
    
    .session-header {
        flex-direction: column;
        gap: 12px;
    }
    
    .modal-content {
        width: 95%;
        margin: 10% auto;
    }
    
    .modal-footer {
        flex-direction: column-reverse;
    }
    
    .modal-footer .btn {
        width: 100%;
        justify-content: center;
    }
}