/**
 * KnowLab 用户端页面公共样式
 * ================================
 * 统一的视觉风格和组件样式
 */

/* ==================== 设计令牌 ==================== */
:root {
    /* 品牌色 */
    --brand-primary: #4F46E5;
    --brand-primary-dark: #4338CA;
    --brand-accent: #7C3AED;
    --brand-gradient: linear-gradient(135deg, #4F46E5 0%, #7C3AED 100%);
    --brand-gradient-dark: linear-gradient(135deg, #312E81 0%, #4C1D95 100%);
    --brand-gradient-light: linear-gradient(135deg, #EEF2FF 0%, #E0E7FF 100%);
    
    /* VIP 金色 */
    --vip-gold: #F59E0B;
    --vip-gold-light: #FCD34D;
    --vip-gradient: linear-gradient(135deg, #FCD34D 0%, #F59E0B 100%);
    
    /* 中性色 */
    --member-bg: linear-gradient(180deg, #F8FAFC 0%, #F1F5F9 100%);
    --card-bg: #FFFFFF;
    --border-light: #E2E8F0;
    --border-medium: #CBD5E1;
    
    /* 文字色 */
    --text-primary: #1E293B;
    --text-secondary: #64748B;
    --text-muted: #94A3B8;
    
    /* 圆角 */
    --radius-card: 20px;
    --radius-button: 14px;
    --radius-input: 12px;
    
    /* 阴影 */
    --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.05);
    --shadow-button: 0 4px 15px rgba(79, 70, 229, 0.3);
    --shadow-button-hover: 0 8px 25px rgba(79, 70, 229, 0.4);
}

/* ==================== 基础重置 ==================== */
.member-page {
    font-family: 'Outfit', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    min-height: 100vh;
    background: var(--member-bg);
}

/* ==================== 全局可用的小增强（低风险） ==================== */
::selection {
    background: rgba(79, 70, 229, 0.18);
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
    outline: 3px solid rgba(79, 70, 229, 0.28);
    outline-offset: 2px;
}

/* 让页面滚动更顺滑（移动端） */
.member-page * {
    -webkit-tap-highlight-color: transparent;
}

/* ==================== 导航栏 ==================== */
.member-navbar {
    background: var(--card-bg);
    border-bottom: 1px solid var(--border-light);
    padding: 16px 24px;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.03);
}

.member-navbar-inner {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

@media (max-width: 640px) {
    .member-navbar { padding: 12px 16px; }
    .member-navbar-inner { gap: 10px; }
    .member-nav-tabs { gap: 6px; overflow: auto; -webkit-overflow-scrolling: touch; }
    .member-nav-tab { padding: 8px 12px; font-size: 13px; white-space: nowrap; }
}

.member-back {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: color 0.2s;
}

.member-back:hover {
    color: var(--brand-primary);
}

.member-page-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
}

.member-nav-tabs {
    display: flex;
    gap: 8px;
}

.member-nav-tab {
    padding: 10px 20px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: 10px;
    transition: all 0.2s;
}

.member-nav-tab:hover {
    color: var(--brand-primary);
    background: #EEF2FF;
}

.member-nav-tab.active {
    color: white;
    background: var(--brand-gradient);
}

/* ==================== 主内容区 ==================== */
.member-main {
    max-width: 1200px;
    margin: 0 auto;
    padding: 32px 24px;
}

/* ==================== 卡片 ==================== */
.member-card {
    background: var(--card-bg);
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-card);
    overflow: hidden;
}

.member-card-header {
    padding: 20px 24px;
    border-bottom: 1px solid #F1F5F9;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.member-card-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
}

.member-card-body {
    padding: 24px;
}

/* ==================== 按钮 ==================== */
.member-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    font-size: 14px;
    font-weight: 600;
    font-family: inherit;
    border: none;
    border-radius: var(--radius-button);
    cursor: pointer;
    transition: all 0.3s;
    text-decoration: none;
}

.member-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
    box-shadow: none !important;
}

.member-btn-primary {
    color: white;
    background: var(--brand-gradient);
    box-shadow: var(--shadow-button);
}

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

.member-btn-secondary {
    color: var(--brand-primary);
    background: #EEF2FF;
    border: 2px solid #E0E7FF;
}

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

/* 输入控件统一（让教材空间等页面更一致） */
.member-input,
.member-select,
.member-textarea {
    width: 100%;
    padding: 12px 14px;
    border: 1px solid var(--border-light);
    border-radius: var(--radius-input);
    background: #fff;
    color: var(--text-primary);
}

.member-input:focus,
.member-select:focus,
.member-textarea:focus {
    border-color: rgba(79, 70, 229, 0.45);
    box-shadow: 0 0 0 4px rgba(79, 70, 229, 0.12);
}

.member-btn-sm {
    padding: 8px 16px;
    font-size: 13px;
}

.member-btn-lg {
    padding: 16px 32px;
    font-size: 16px;
}

/* ==================== 网格布局 ==================== */
.member-grid {
    display: grid;
    gap: 24px;
}

.member-grid-2 {
    grid-template-columns: repeat(2, 1fr);
}

.member-grid-3 {
    grid-template-columns: repeat(3, 1fr);
}

.member-grid-4 {
    grid-template-columns: repeat(4, 1fr);
}

@media (max-width: 1024px) {
    .member-grid-4 { grid-template-columns: repeat(2, 1fr); }
    .member-grid-3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 640px) {
    .member-grid-4 { grid-template-columns: 1fr; }
    .member-grid-3 { grid-template-columns: 1fr; }
    .member-grid-2 { grid-template-columns: 1fr; }
}

/* ==================== 作品卡片 ==================== */
.work-card {
    background: var(--card-bg);
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-card);
    overflow: hidden;
    transition: all 0.3s;
}

.work-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.work-card-cover {
    aspect-ratio: 16/10;
    background: var(--brand-gradient-light);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--brand-primary);
    font-size: 48px;
}

.work-card-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.work-card-body {
    padding: 20px;
}

.work-card-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.work-card-meta {
    display: flex;
    align-items: center;
    gap: 16px;
    font-size: 13px;
    color: var(--text-muted);
}

.work-card-stat {
    display: flex;
    align-items: center;
    gap: 4px;
}

.work-card-actions {
    display: flex;
    gap: 8px;
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid #F1F5F9;
}

/* ==================== 标签/徽章 ==================== */
.member-badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 10px;
    font-size: 12px;
    font-weight: 600;
    border-radius: 6px;
}

.member-badge-primary {
    background: #EEF2FF;
    color: var(--brand-primary);
}

.member-badge-success {
    background: #DCFCE7;
    color: #166534;
}

.member-badge-warning {
    background: #FEF3C7;
    color: #92400E;
}

.member-badge-danger {
    background: #FEE2E2;
    color: #DC2626;
}

/* ==================== 空状态 ==================== */
.member-empty {
    text-align: center;
    padding: 80px 24px;
}

.member-empty-icon {
    width: 120px;
    height: 120px;
    margin: 0 auto 24px;
    background: var(--brand-gradient-light);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--brand-primary);
}

.member-empty-icon svg {
    width: 56px;
    height: 56px;
    opacity: 0.6;
}

.member-empty-title {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.member-empty-desc {
    font-size: 15px;
    color: var(--text-secondary);
    margin-bottom: 24px;
}

/* ==================== 筛选标签 ==================== */
.member-filter-tabs {
    display: flex;
    gap: 8px;
    margin-bottom: 24px;
    padding: 8px;
    background: var(--card-bg);
    border-radius: 12px;
}

.member-filter-tab {
    padding: 10px 20px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    background: transparent;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s;
}

.member-filter-tab:hover {
    color: var(--brand-primary);
}

.member-filter-tab.active {
    color: white;
    background: var(--brand-gradient);
}

/* ==================== 统计数字 ==================== */
.member-stat-card {
    background: var(--card-bg);
    border-radius: 16px;
    padding: 24px;
    text-align: center;
    box-shadow: var(--shadow-card);
}

.member-stat-value {
    font-size: 32px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.member-stat-label {
    font-size: 14px;
    color: var(--text-secondary);
}

/* ==================== 加载动画 ==================== */
.member-loading {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 60px;
}

.member-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid #E2E8F0;
    border-top-color: var(--brand-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}