/* ============================================================
   前台樣式 — 夜讀燈下（Lamp-Lit Reading）
   設計重點：深夜書桌、燈下讀書的氛圍；留白、襯線、儀式感
   配色：深墨綠 + 米黃字 + 暖陶 accent，與後台 Twilight 形成姐妹色
   ============================================================ */

:root {
    /* 色票 */
    --bg:         #1a2421;                          /* 深墨綠 */
    --bg-soft:    #1f2a26;                          /* 略淺，用於 inline code 等 */
    --fg:         #e8d8b8;                          /* 米黃，仿暖燈光下的紙色 */
    --fg-soft:    rgba(232, 216, 184, 0.62);
    --fg-muted:   rgba(232, 216, 184, 0.42);
    --accent:     #c79572;                          /* 暖陶/落日 */
    --line:       rgba(232, 216, 184, 0.12);
    --line-soft:  rgba(232, 216, 184, 0.06);

    /* 寬度 */
    --max:        720px;                            /* 文章主要寬 */
    --max-narrow: 600px;                            /* About 較窄 */
}

* { box-sizing: border-box; }

html {
    background: var(--bg);
    color: var(--fg);
    font-family: "Noto Serif TC", "Source Han Serif TC", "Songti TC",
                 "PingFang TC", "Microsoft JhengHei", Georgia, serif;
    font-size: 17px;
    line-height: 2.05;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    margin: 0;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

a {
    color: var(--fg);
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: border-color .25s ease, color .25s ease;
}
a:hover { border-bottom-color: var(--accent); }

img { max-width: 100%; height: auto; display: block; }

.wrap {
    max-width: var(--max);
    margin: 0 auto;
    padding: 0 32px;
}

/* ============================================================
   Header — 中軸對齊、書本扉頁感
   ============================================================ */
.site-header {
    padding: 72px 0 24px;
    text-align: center;
}
.site-header .wrap {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 28px;
}

.brand {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: var(--fg);
    border-bottom: none;
}
.brand:hover { border-bottom: none; }
.brand strong {
    font-size: 28px;
    letter-spacing: 6px;
    font-weight: 500;
    /* 補 letter-spacing 造成的視覺位移，讓字塊看起來真正居中 */
    padding-left: 6px;
}
.brand .subtitle {
    font-size: 13px;
    letter-spacing: 4px;
    color: var(--fg-soft);
    font-weight: normal;
    padding-left: 4px;
}

.site-nav {
    display: flex;
    gap: 40px;
    font-size: 14px;
    letter-spacing: 3px;
    padding-top: 4px;
}
.site-nav a {
    color: var(--fg-soft);
    padding-bottom: 4px;
}
.site-nav a:hover { color: var(--fg); }

/* Header 下的分節符 — 像書頁與內文之間的扉頁 */
.site-header::after {
    content: "❦";
    display: block;
    text-align: center;
    color: var(--accent);
    font-size: 16px;
    margin-top: 36px;
    opacity: 0.7;
}

/* ============================================================
   Main / 首頁文集目錄
   ============================================================ */
.site-main {
    flex: 1;
    padding: 32px 0 96px;
}

.post-list {
    max-width: var(--max);
    margin: 0 auto;
    display: flex;
    flex-direction: column;
}

.post-card {
    background: none;
    border: none;
    border-radius: 0;
    overflow: visible;
    padding: 40px 0;
    border-bottom: 1px solid var(--line-soft);
    transition: none;
}
.post-card:last-child { border-bottom: none; }
.post-card:hover { transform: none; box-shadow: none; }

.post-card-link {
    display: block;
    color: var(--fg);
    border-bottom: none;
}
.post-card-link:hover { border-bottom: none; }

.post-card-meta {
    margin: 0 0 12px;
    font-size: 12px;
    color: var(--fg-muted);
    letter-spacing: 4px;
}
.post-card-title {
    margin: 0 0 16px;
    font-size: 26px;
    line-height: 1.6;
    font-weight: 500;
    color: var(--fg);
    letter-spacing: 1px;
    transition: color .25s ease;
}
.post-card-link:hover .post-card-title { color: var(--accent); }
.post-card-excerpt {
    margin: 0;
    color: var(--fg-soft);
    font-size: 15px;
    line-height: 1.85;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.empty-state {
    text-align: center;
    padding: 96px 32px;
    color: var(--fg-muted);
    font-size: 16px;
    letter-spacing: 2px;
}

/* ============================================================
   Pagination — 極簡居中
   ============================================================ */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 32px;
    margin-top: 80px;
    padding-top: 32px;
    font-size: 13px;
    color: var(--fg-soft);
    letter-spacing: 3px;
}
.pagination a {
    color: var(--fg-soft);
    padding: 4px 0;
    border-bottom: 1px solid transparent;
}
.pagination a:hover { color: var(--fg); border-bottom-color: var(--accent); }

/* ============================================================
   文章詳細頁
   ============================================================ */
.post {
    max-width: var(--max);
    margin: 0 auto;
}

.post-header {
    margin-bottom: 56px;
    text-align: center;
    padding-top: 16px;
}
.post-header h1 {
    margin: 0 0 16px;
    font-size: 34px;
    line-height: 1.5;
    font-weight: 500;
    letter-spacing: 1.5px;
}
.post-meta {
    margin: 0 0 24px;
    font-size: 12px;
    color: var(--fg-muted);
    letter-spacing: 4px;
}
.post-cover {
    margin: 32px auto 0;
    border-radius: 0;
    overflow: hidden;
}
.post-cover img { width: 100%; }

/* ─── Markdown 內容區 ─── */
.post-content {
    font-size: 17px;
    line-height: 2.05;
    color: var(--fg);
}

.post-content h2 {
    margin: 64px 0 24px;
    font-size: 22px;
    font-weight: 500;
    letter-spacing: 4px;
    text-align: center;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--line);
}
.post-content h3 {
    margin: 40px 0 16px;
    font-size: 18px;
    font-weight: 500;
    letter-spacing: 2px;
    font-style: italic;
    color: var(--accent);
}
.post-content h3::before {
    content: "❦ ";
    margin-right: 4px;
    font-style: normal;
    opacity: 0.7;
}

.post-content p { margin: 0 0 1.6em; }
.post-content ul,
.post-content ol {
    padding-left: 1.6em;
    margin: 0 0 1.6em;
}
.post-content li { margin-bottom: .5em; }

/* blockquote — 無邊線、置中、斜體、孤立 */
.post-content blockquote {
    margin: 2.4em auto;
    padding: 0 32px;
    max-width: 80%;
    border: none;
    background: none;
    color: var(--fg-soft);
    font-style: italic;
    text-align: center;
    font-size: 18px;
    line-height: 1.95;
}
.post-content blockquote p { margin: 0; }
.post-content blockquote p + p { margin-top: 1em; }

/* hr → 葉飾分節符 ❦ */
.post-content hr {
    border: none;
    margin: 3em 0;
    text-align: center;
    height: 1.4em;
    overflow: visible;
}
.post-content hr::before {
    content: "❦";
    color: var(--accent);
    font-size: 1.4em;
    opacity: 0.7;
}

.post-content code {
    background: var(--bg-soft);
    border: 1px solid var(--line);
    border-radius: 3px;
    padding: 1px 6px;
    font-family: ui-monospace, "SF Mono", Menlo, Consolas,
                 "Noto Sans Mono CJK TC", monospace;
    font-size: 90%;
    color: var(--accent);
}
.post-content pre {
    background: #0f1816;
    color: var(--fg);
    padding: 20px 24px;
    border-radius: 4px;
    border: 1px solid var(--line);
    overflow-x: auto;
    line-height: 1.7;
    margin: 1.8em 0;
}
.post-content pre code {
    background: none;
    border: none;
    padding: 0;
    color: inherit;
    font-size: 14px;
}
.post-content img {
    margin: 2em auto;
    border-radius: 0;
}
.post-content a {
    color: var(--accent);
    border-bottom: 1px solid var(--line);
}
.post-content a:hover { border-bottom-color: var(--accent); }

.post-footer {
    margin-top: 80px;
    padding-top: 32px;
    border-top: 1px solid var(--line-soft);
    font-size: 13px;
    text-align: center;
    letter-spacing: 2px;
}
.post-footer a { color: var(--fg-soft); }
.post-footer a:hover { color: var(--fg); }

/* ============================================================
   About 頁 — 主標放大置中 + ❦ 分節
   ============================================================ */
.post.about-post {
    max-width: var(--max-narrow);
}
.post.about-post .post-header {
    margin-bottom: 64px;
}
.post.about-post .post-header h1 {
    font-size: 48px;
    letter-spacing: 8px;
    margin-bottom: 24px;
    padding-left: 8px;
    font-weight: 500;
}
.post.about-post .post-header::after {
    content: "❦";
    display: block;
    color: var(--accent);
    font-size: 1.4em;
    margin-top: 24px;
    opacity: 0.7;
}

/* ============================================================
   Footer — 居中極簡、寬字距
   ============================================================ */
.site-footer {
    padding: 48px 0 56px;
    color: var(--fg-muted);
    font-size: 12px;
    text-align: center;
    letter-spacing: 3px;
}
.site-footer .wrap { max-width: var(--max); }
.site-footer p { margin: 0; }

/* ============================================================
   行動裝置（≤720px）
   ============================================================ */
@media (max-width: 720px) {
    html { font-size: 16px; line-height: 1.95; }
    .wrap { padding: 0 24px; }

    .site-header { padding: 48px 0 16px; }
    .site-header .wrap { gap: 20px; }
    .site-header::after { margin-top: 24px; font-size: 14px; }
    .brand strong { font-size: 22px; letter-spacing: 4px; padding-left: 4px; }
    .brand .subtitle { font-size: 12px; letter-spacing: 3px; padding-left: 3px; }
    .site-nav { gap: 28px; font-size: 13px; letter-spacing: 2px; }

    .site-main { padding: 24px 0 64px; }

    .post-card { padding: 32px 0; }
    .post-card-title { font-size: 21px; letter-spacing: 0.5px; }
    .post-card-excerpt { font-size: 14.5px; }

    .post-header { margin-bottom: 40px; }
    .post-header h1 { font-size: 26px; letter-spacing: 1px; }

    .post-content { font-size: 16px; line-height: 2.0; }
    .post-content h2 {
        font-size: 19px;
        margin: 48px 0 18px;
        letter-spacing: 3px;
    }
    .post-content h3 { font-size: 17px; margin: 32px 0 14px; }
    .post-content blockquote {
        max-width: 100%;
        font-size: 16px;
        padding: 0 16px;
        margin: 2em auto;
    }
    .post-content pre { padding: 16px 18px; }

    .post.about-post .post-header h1 { font-size: 36px; letter-spacing: 5px; }

    .pagination { gap: 24px; font-size: 12px; letter-spacing: 2px; }

    .site-footer { padding: 36px 0 40px; letter-spacing: 2px; }

    .category-nav .wrap { padding: 0 16px; gap: 6px; }
    .category-nav-item { padding: 4px 12px; font-size: 12px; letter-spacing: 2px; }
    .category-index-list li { padding: 20px 0; }
    .category-page-header h1 { font-size: 28px; letter-spacing: 4px; }
}

/* ============================================================
   2026-05-01：多分類 + 個人日誌（visibility）
   ============================================================ */

/* ---- 頂部分類 nav（細條，融入夜讀風）---- */
.category-nav {
    border-top: 1px solid var(--line-soft);
    border-bottom: 1px solid var(--line-soft);
    padding: 14px 0;
    margin-top: -8px; /* 微調與 site-header::after 的距離 */
}
.category-nav .wrap {
    display: flex;
    flex-wrap: nowrap;
    gap: 10px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: thin;
    justify-content: center;
}
.category-nav-item {
    display: inline-block;
    padding: 4px 14px;
    font-size: 13px;
    letter-spacing: 3px;
    color: var(--fg-soft);
    border-bottom: 1px solid transparent;
    white-space: nowrap;
    transition: color .25s ease, border-color .25s ease;
}
.category-nav-item:hover { color: var(--fg); border-bottom-color: transparent; }
.category-nav-item.is-active {
    color: var(--accent);
    border-bottom-color: var(--accent);
}

/* ---- 個人日誌徽章 / 卡片強調 / 文章頁橫幅 ---- */
.personal-badge {
    display: inline-block;
    margin-left: 10px;
    padding: 1px 8px;
    border-radius: 10px;
    background: rgba(156, 125, 143, 0.18);
    color: #d8c0cc;
    border: 1px solid rgba(156, 125, 143, 0.45);
    font-size: 11px;
    letter-spacing: 2px;
    vertical-align: middle;
}
.post-card-personal .post-card-title::before {
    /* 卡片標題前不加任何符號，避免重複；徽章已在 meta 列中顯示 */
}
.post-card-personal {
    /* 個人日誌卡片左側暖紫細邊，柔和區別 */
    box-shadow: inset 3px 0 0 0 rgba(156, 125, 143, 0.55);
    padding-left: 16px;
}

.personal-banner {
    max-width: var(--max);
    margin: 24px auto 0;
    padding: 12px 18px;
    background: rgba(156, 125, 143, 0.14);
    color: #e0c8d4;
    border: 1px solid rgba(156, 125, 143, 0.42);
    border-radius: 4px;
    font-size: 14px;
    letter-spacing: 2px;
    text-align: center;
}

/* ---- 文章詳細頁分類 chip ---- */
.post-categories {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 12px;
    justify-content: center;
}
.post-category-chip {
    display: inline-block;
    padding: 3px 12px;
    font-size: 12px;
    letter-spacing: 2px;
    color: var(--fg-soft);
    border: 1px solid var(--line);
    border-radius: 14px;
    transition: color .2s, border-color .2s;
}
.post-category-chip:hover {
    color: var(--accent);
    border-color: var(--accent);
    border-bottom: 1px solid var(--accent); /* 蓋掉預設 a 的 border */
}

/* ---- 分類索引頁 / 單分類頁 ---- */
.category-index {
    max-width: var(--max);
    margin: 0 auto;
    padding-top: 16px;
}
.category-index-header { text-align: center; margin-bottom: 48px; }
.category-index-header h1 {
    font-size: 32px;
    letter-spacing: 6px;
    font-weight: 500;
    margin: 0 0 12px;
}
.category-index-sub {
    color: var(--fg-soft);
    letter-spacing: 3px;
    font-size: 13px;
}
.category-index-list {
    list-style: none;
    margin: 0;
    padding: 0;
}
.category-index-list li {
    padding: 28px 0;
    border-bottom: 1px solid var(--line-soft);
}
.category-index-list li:last-child { border-bottom: none; }
.category-index-link {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 16px;
    color: var(--fg);
    border-bottom: none;
}
.category-index-link:hover { border-bottom: none; }
.category-index-link:hover .category-index-name { color: var(--accent); }
.category-index-name {
    font-size: 20px;
    letter-spacing: 2px;
    transition: color .25s;
}
.category-index-count {
    font-size: 12px;
    color: var(--fg-muted);
    letter-spacing: 3px;
}
.category-index-desc {
    margin: 8px 0 0;
    color: var(--fg-soft);
    font-size: 14px;
    line-height: 1.85;
}

.category-page-header {
    text-align: center;
    margin-bottom: 32px;
}
.category-page-eyebrow {
    color: var(--fg-muted);
    font-size: 12px;
    letter-spacing: 4px;
    margin: 0 0 8px;
}
.category-page-header h1 {
    font-size: 32px;
    letter-spacing: 5px;
    font-weight: 500;
    margin: 0 0 12px;
}
.category-page-desc {
    color: var(--fg-soft);
    font-size: 14px;
    letter-spacing: 1.5px;
    max-width: 520px;
    margin: 0 auto;
}