/**
 * bulletin.css - 佈告欄頁面樣式
 */

/* ========== 頁面標題 ========== */
.bulletin-page .page-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
}

/* ========== 類型篩選 ========== */
.bulletin-filters {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.btn-filter {
    padding: 0.375rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 50px;
    background: var(--bg-primary);
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
    transition: all 0.2s ease;
}

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

.btn-filter.active {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: #fff;
}

/* ========== 正方形卡片 ========== */
.bulletin-card {
    display: flex;
    flex-direction: column;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    overflow: hidden;
    transition: all 0.3s ease;
    text-decoration: none;
    color: inherit;
    height: 100%;
}

.bulletin-card:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
    color: inherit;
    text-decoration: none;
}

/* 上半段：圖片/圖示區域 */
.bulletin-card-image {
    position: relative;
    width: 100%;
    aspect-ratio: 1 / 1;
    overflow: hidden;
    background: var(--bg-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
}

.bulletin-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.bulletin-card:hover .bulletin-card-image img {
    transform: scale(1.05);
}

.bulletin-card-icon {
    font-size: 3rem;
    color: var(--text-tertiary);
    opacity: 0.6;
}

/* 置頂標記 */
.bulletin-card-pinned {
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    background: var(--primary-color);
    color: #fff;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
}

/* 中段：分類標籤 + 標題 */
.bulletin-card-middle {
    padding: 0.75rem 1rem 0.5rem;
    text-align: center;
}

.bulletin-card-tag {
    display: inline-block;
    padding: 0.2rem 0.6rem;
    border-radius: 4px;
    font-size: 0.7rem;
    font-weight: 500;
    color: #fff;
    margin-bottom: 0.5rem;
}

.bulletin-card-title {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    line-height: 1.4;
}

/* 下半段：摘要 */
.bulletin-card-bottom {
    padding: 0 1rem 0.75rem;
    flex: 1;
}

.bulletin-card-summary {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin: 0;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    line-height: 1.5;
    text-align: left;
}

/* 卡片底部日期 */
.bulletin-card-date {
    padding: 0.5rem 1rem 0.75rem;
    font-size: 0.75rem;
    color: var(--text-tertiary);
    text-align: right;
    border-top: 1px dashed var(--border-color);
}

/* ========== 空資料狀態 ========== */
.bulletin-empty-state {
    text-align: center;
    padding: 4rem 2rem;
    color: var(--text-tertiary);
}

.bulletin-empty-state i {
    opacity: 0.4;
}

/* ========== 顯示模式（詳情頁） ========== */
.bulletin-detail-header {
    margin-bottom: 2rem;
}

.bulletin-detail-meta {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

.bulletin-tag {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: 4px;
    font-size: 0.8rem;
    font-weight: 500;
    color: #fff;
}

.bulletin-date,
.bulletin-views {
    font-size: 0.875rem;
    color: var(--text-tertiary);
}

.bulletin-detail-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
    line-height: 1.4;
}

.bulletin-detail-summary {
    font-size: 1.1rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

.bulletin-detail-image {
    margin-bottom: 2rem;
}

.bulletin-detail-image img {
    max-width: 100%;
    border-radius: 0.5rem;
}

.bulletin-detail-content {
    margin-bottom: 2rem;
}

.bulletin-detail-content .card-body {
    font-size: 1rem;
    line-height: 1.8;
    color: var(--text-primary);
}

.bulletin-detail-content .card-body img {
    max-width: 100%;
    height: auto;
    border-radius: 0.25rem;
}

/* ========== Markdown 渲染樣式 ========== */
/* 通用 .markdown-body 樣式已移至 /css/markdown.css */

/* 後台 Markdown 預覽區域 */
.bulletin-content-preview {
    min-height: 200px;
    max-height: 500px;
    overflow-y: auto;
    border: 1px solid var(--border-color);
    border-radius: 0.375rem;
    padding: 0.75rem 1rem;
    background: var(--bg-primary);
}

/* ========== 響應式 ========== */
@media (max-width: 575.98px) {
    .bulletin-detail-title {
        font-size: 1.5rem;
    }

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

    .bulletin-card-summary {
        font-size: 0.75rem;
        -webkit-line-clamp: 2;
    }
}