/* 优化版全局样式 - CILS B2 打卡系统 */

/* ========== 设计系统 ========== */
:root {
    /* 主色系 - 使用 Notion/Linear 同款蓝 */
    --color-primary: #2563eb;
    --color-primary-hover: #1d4ed8;
    --color-primary-light: #dbeafe;
    
    /* 功能色 */
    --color-success: #10b981;
    --color-success-light: #d1fae5;
    --color-warning: #f59e0b;
    --color-warning-light: #fef3c7;
    --color-danger: #ef4444;
    --color-danger-light: #fee2e2;
    --color-info: #3b82f6;
    --color-info-light: #dbeafe;
    
    /* 中性色 */
    --color-gray-50: #f9fafb;
    --color-gray-100: #f3f4f6;
    --color-gray-200: #e5e7eb;
    --color-gray-300: #d1d5db;
    --color-gray-400: #9ca3af;
    --color-gray-500: #6b7280;
    --color-gray-600: #4b5563;
    --color-gray-700: #374151;
    --color-gray-800: #1f2937;
    --color-gray-900: #111827;
    
    /* 文字颜色 */
    --text-primary: #111827;
    --text-secondary: #6b7280;
    --text-tertiary: #9ca3af;
    
    /* 背景色 */
    --bg-page: #f9fafb;
    --bg-card: #ffffff;
    
    /* 阴影 */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    
    /* 圆角 */
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    
    /* 间距 */
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 32px;
}

/* ========== 基础重置 ========== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background: var(--bg-page);
    color: var(--text-primary);
    line-height: 1.6;
    font-size: 16px;
}

/* ========== 导航栏 ========== */
.navbar {
    background: var(--bg-card);
    box-shadow: var(--shadow-sm);
    padding: var(--space-md) var(--space-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

.navbar-brand {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

.navbar-menu {
    display: flex;
    gap: var(--space-sm);
    list-style: none;
}

.navbar-menu a {
    text-decoration: none;
    color: var(--text-secondary);
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-md);
    transition: all 0.2s;
    font-weight: 500;
    font-size: 15px;
}

.navbar-menu a:hover {
    background: var(--color-gray-100);
    color: var(--text-primary);
}

.navbar-user {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.navbar-user span {
    color: var(--text-secondary);
    font-size: 14px;
}

/* ========== 容器 ========== */
.container {
    max-width: 800px;
    margin: 0 auto;
    padding: var(--space-lg);
}

/* ========== 卡片 ========== */
.card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    padding: var(--space-lg);
    margin-bottom: var(--space-md);
    border: none;
}

.card-header {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: var(--space-md);
    padding-bottom: var(--space-md);
    border-bottom: 1px solid var(--color-gray-100);
    color: var(--text-primary);
}

/* ========== 按钮系统 ========== */
.btn {
    padding: 10px 20px;
    border: none;
    border-radius: var(--radius-md);
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    line-height: 1.5;
}

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

.btn-primary:hover {
    background: var(--color-primary-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

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

.btn-success:hover {
    background: #059669;
}

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

.btn-danger:hover {
    background: #dc2626;
}

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

.btn-warning:hover {
    background: #d97706;
}

.btn-secondary {
    background: var(--bg-card);
    color: var(--text-primary);
    border: 1px solid var(--color-gray-200);
}

.btn-secondary:hover {
    background: var(--color-gray-50);
    border-color: var(--color-gray-300);
}

.btn-block {
    width: 100%;
}

.btn-sm {
    padding: 6px 14px;
    font-size: 14px;
}

/* ========== 表单 ========== */
.form-group {
    margin-bottom: var(--space-md);
}

.form-label {
    display: block;
    margin-bottom: var(--space-sm);
    color: var(--text-primary);
    font-weight: 600;
    font-size: 15px;
}

.form-input,
.form-textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-md);
    font-size: 15px;
    transition: all 0.2s;
    background: var(--bg-card);
    color: var(--text-primary);
}

.form-input:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-primary-light);
}

.form-textarea {
    resize: vertical;
    min-height: 100px;
    font-family: inherit;
}

/* ========== 进度条 ========== */
.progress-bar {
    width: 100%;
    height: 8px;
    background: var(--color-gray-100);
    border-radius: 999px;
    overflow: hidden;
    margin: var(--space-md) 0;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--color-primary), var(--color-info));
    transition: width 0.3s ease;
    border-radius: 999px;
}

/* ========== 天数卡片 ========== */
.day-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    margin-bottom: var(--space-md);
    box-shadow: var(--shadow-sm);
    cursor: pointer;
    transition: all 0.2s;
    border: 2px solid transparent;
}

.day-card.unlocked {
    border-color: var(--color-primary);
}

.day-card.unlocked:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.day-card.completed {
    border-color: var(--color-success);
    background: var(--color-success-light);
}

.day-card.locked {
    opacity: 0.5;
    cursor: not-allowed;
    border-color: var(--color-gray-200);
    background: var(--color-gray-50);
}

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

.day-title {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
}

.day-status-icon {
    font-size: 24px;
}

.day-stats {
    color: var(--text-secondary);
    font-size: 14px;
    margin-top: var(--space-sm);
    margin-left: 36px;
}

.expand-btn {
    color: var(--color-primary);
    font-size: 14px;
    font-weight: 600;
}

.locked-hint {
    color: var(--text-tertiary);
    font-size: 14px;
    margin-top: var(--space-sm);
    margin-left: 36px;
}

/* ========== 板块列表卡片 ========== */
.category-list-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    margin-bottom: var(--space-md);
    cursor: pointer;
    transition: all 0.2s;
    border-left: 4px solid;
    box-shadow: var(--shadow-sm);
}

.category-list-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateX(4px);
}

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

.category-list-title {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 17px;
    font-weight: 700;
}

.category-task {
    color: var(--text-secondary);
    font-size: 14px;
    margin-top: var(--space-sm);
}

/* ========== 徽章 ========== */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 12px;
    border-radius: 999px;
    font-size: 13px;
    font-weight: 600;
}

.badge-success {
    background: var(--color-success-light);
    color: var(--color-success);
}

.badge-warning {
    background: var(--color-warning-light);
    color: var(--color-warning);
}

.badge-danger {
    background: var(--color-danger-light);
    color: var(--color-danger);
}

.badge-info {
    background: var(--color-info-light);
    color: var(--color-info);
}

/* ========== 提示框 ========== */
.alert {
    padding: var(--space-md);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-md);
    border-left: 4px solid;
}

.alert-success {
    background: var(--color-success-light);
    color: var(--color-success);
    border-left-color: var(--color-success);
}

.alert-warning {
    background: var(--color-warning-light);
    color: #92400e;
    border-left-color: var(--color-warning);
}

.alert-danger {
    background: var(--color-danger-light);
    color: #991b1b;
    border-left-color: var(--color-danger);
}

.alert-info {
    background: var(--color-info-light);
    color: #1e40af;
    border-left-color: var(--color-info);
}

/* ========== 图片预览 ========== */
.image-preview-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: var(--space-md);
    margin-top: var(--space-md);
}

.image-preview-item {
    position: relative;
    border-radius: var(--radius-md);
    overflow: hidden;
    aspect-ratio: 1;
    box-shadow: var(--shadow-sm);
}

.image-preview-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    cursor: pointer;
    transition: transform 0.2s;
}

.image-preview-item:hover img {
    transform: scale(1.05);
}

.image-remove-btn {
    position: absolute;
    top: 6px;
    right: 6px;
    background: var(--color-danger);
    color: white;
    border: none;
    border-radius: 999px;
    width: 24px;
    height: 24px;
    cursor: pointer;
    font-size: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-md);
    transition: transform 0.2s;
}

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

/* ========== 排行榜 ========== */
.leaderboard-item {
    display: flex;
    align-items: center;
    padding: var(--space-md);
    border-bottom: 1px solid var(--color-gray-100);
    transition: background 0.2s;
}

.leaderboard-item:hover {
    background: var(--color-gray-50);
}

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

.leaderboard-rank {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-secondary);
    min-width: 50px;
}

.leaderboard-rank.rank-1 { color: #f59e0b; }
.leaderboard-rank.rank-2 { color: #94a3b8; }
.leaderboard-rank.rank-3 { color: #d97706; }

.leaderboard-name {
    flex: 1;
    font-weight: 600;
    font-size: 16px;
}

.leaderboard-rate {
    font-size: 18px;
    font-weight: 700;
    color: var(--color-primary);
}

/* ========== 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;
    backdrop-filter: blur(4px);
}

.modal.active {
    display: flex;
}

.modal-content {
    background: var(--bg-card);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    max-width: 90%;
    max-height: 90%;
    overflow: auto;
    position: relative;
    box-shadow: var(--shadow-lg);
}

.modal-close {
    position: absolute;
    top: var(--space-md);
    right: var(--space-md);
    background: var(--color-gray-100);
    border: none;
    border-radius: 999px;
    width: 32px;
    height: 32px;
    font-size: 20px;
    cursor: pointer;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}

.modal-close:hover {
    background: var(--color-gray-200);
    color: var(--text-primary);
}

/* ========== Lightbox ========== */
.lightbox {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.9);
    z-index: 2000;
    align-items: center;
    justify-content: center;
}

.lightbox.active {
    display: flex;
}

.lightbox img {
    max-width: 90%;
    max-height: 90%;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
}

.lightbox-close {
    position: absolute;
    top: var(--space-lg);
    right: var(--space-lg);
    background: white;
    color: black;
    border: none;
    border-radius: 999px;
    width: 40px;
    height: 40px;
    font-size: 24px;
    cursor: pointer;
    box-shadow: var(--shadow-lg);
}

/* ========== 统计卡片 ========== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
}

.stat-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    box-shadow: var(--shadow-sm);
    text-align: center;
}

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

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

/* ========== 工具类 ========== */
.text-center { text-align: center; }
.text-right { text-align: right; }
.mt-1 { margin-top: var(--space-xs); }
.mt-2 { margin-top: var(--space-sm); }
.mt-3 { margin-top: var(--space-md); }
.mb-1 { margin-bottom: var(--space-xs); }
.mb-2 { margin-bottom: var(--space-sm); }
.mb-3 { margin-bottom: var(--space-md); }
.flex { display: flex; }
.flex-between { display: flex; justify-content: space-between; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.gap-1 { gap: var(--space-xs); }
.gap-2 { gap: var(--space-sm); }
.hidden { display: none; }

/* ========== 响应式 ========== */
@media (max-width: 768px) {
    .container {
        padding: var(--space-md);
    }
    
    .navbar {
        flex-direction: column;
        gap: var(--space-md);
        padding: var(--space-md);
    }
    
    .navbar-menu {
        flex-direction: column;
        width: 100%;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .card {
        padding: var(--space-md);
    }
    
    .day-card {
        padding: var(--space-md);
    }
}

/* ========== 加载动画 ========== */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid var(--color-gray-200);
    border-radius: 50%;
    border-top-color: var(--color-primary);
    animation: spin 1s ease-in-out infinite;
}

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