/* 共用版型:紙面 × 墨色,accent 由各站 _head.php 注入 */
:root {
    --paper: #f7f7f4;
    --card: #ffffff;
    --ink: #1c1e21;
    --ink-soft: #55585e;
    --ink-faint: #9a9da3;
    --rule: #e3e3de;
    --serif: "Noto Serif TC", "Noto Serif CJK TC", "Songti TC", "PMingLiU", serif;
    --sans: "PingFang TC", "Noto Sans TC", "Noto Sans CJK TC", "Microsoft JhengHei", system-ui, sans-serif;
    --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { font-size: 17px; }

body {
    font-family: var(--sans);
    background: var(--paper);
    color: var(--ink);
    line-height: 1.9;
    letter-spacing: 0.02em;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 0.25em; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* ---- 版面骨架:左書脊 + 內容欄 ---- */
.page {
    display: flex;
    max-width: 60rem;
    margin: 0 auto;
    min-height: 100vh;
    gap: 2.5rem;
    padding: 0 1.25rem;
}

.spine {
    flex: 0 0 3.2rem;
    border-right: 1px solid var(--rule);
    display: flex;
    justify-content: center;
    padding-top: 3rem;
}
.spine span {
    writing-mode: vertical-rl;
    font-family: var(--serif);
    font-weight: 700;
    font-size: 1.05rem;
    letter-spacing: 0.5em;
    color: var(--accent);
}

.content {
    flex: 1;
    min-width: 0;
    max-width: 42rem;
    padding: 3rem 0 5rem;
}

/* ---- 首頁 ---- */
.masthead { margin-bottom: 3.5rem; }
.masthead-domain {
    font-family: var(--mono);
    font-size: 0.75rem;
    color: var(--ink-faint);
    letter-spacing: 0.08em;
    margin-bottom: 0.75rem;
}
.masthead-title {
    font-family: var(--serif);
    font-size: 2.6rem;
    font-weight: 900;
    line-height: 1.3;
}
.masthead-title a { color: var(--ink); }
.masthead-title a:hover { text-decoration: none; color: var(--accent); }
.masthead-desc {
    margin-top: 1rem;
    color: var(--ink-soft);
    max-width: 36rem;
}

.entry-list { border-top: 1px solid var(--rule); }
.entry-item {
    display: flex;
    gap: 1.5rem;
    padding: 1.6rem 0;
    border-bottom: 1px solid var(--rule);
}
.entry-date {
    flex: 0 0 5.2rem;
    font-family: var(--mono);
    font-size: 0.78rem;
    color: var(--ink-faint);
    padding-top: 0.45rem;
}
.entry-title {
    font-family: var(--serif);
    font-size: 1.25rem;
    font-weight: 700;
    line-height: 1.55;
}
.entry-title a { color: var(--ink); }
.entry-title a:hover { color: var(--accent); text-decoration: none; }
.entry-excerpt {
    margin-top: 0.4rem;
    font-size: 0.9rem;
    color: var(--ink-soft);
}
.entry-text { flex: 1; min-width: 0; }
.entry-thumb {
    flex: 0 0 10.5rem;
    align-self: flex-start;
    margin-top: 0.35rem;
}
.entry-thumb svg { display: block; width: 100%; height: auto; }

.pager {
    display: flex;
    justify-content: space-between;
    margin-top: 2.5rem;
    font-size: 0.92rem;
}
.pager-next { margin-left: auto; }

.empty {
    border: 1px dashed var(--accent-line);
    background: var(--accent-soft);
    padding: 2.5rem;
    text-align: center;
    color: var(--ink-soft);
}

/* ---- 文章頁 ---- */
.crumb { font-size: 0.85rem; margin-bottom: 2.5rem; }

.article-hero { margin-bottom: 2rem; }
.article-hero svg { display: block; width: 100%; height: auto; }

.article-date {
    font-family: var(--mono);
    font-size: 0.78rem;
    color: var(--ink-faint);
    letter-spacing: 0.08em;
}
.article-title {
    font-family: var(--serif);
    font-size: 2rem;
    font-weight: 900;
    line-height: 1.5;
    margin: 0.75rem 0 1rem;
}
.article-lead {
    color: var(--ink-soft);
    border-left: 3px solid var(--accent);
    padding-left: 1rem;
    margin-bottom: 0.5rem;
}
.article-head { margin-bottom: 2.5rem; }

.article-body { text-align: justify; }
.article-body p { margin: 1.2rem 0; }
.article-body h2 {
    font-family: var(--serif);
    font-size: 1.4rem;
    font-weight: 700;
    line-height: 1.6;
    margin: 2.5rem 0 0.8rem;
    padding-top: 1.2rem;
    border-top: 1px solid var(--rule);
}
.article-body h2::before {
    content: "";
    display: inline-block;
    width: 0.55em;
    height: 0.55em;
    background: var(--accent);
    margin-right: 0.5em;
}
.article-body h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin: 1.8rem 0 0.5rem;
}
.article-body ul, .article-body ol { margin: 1.2rem 0 1.2rem 1.6rem; }
.article-body li { margin: 0.35rem 0; }
.article-body blockquote {
    border-left: 3px solid var(--accent-line);
    background: var(--accent-soft);
    padding: 0.8rem 1.2rem;
    margin: 1.2rem 0;
    color: var(--ink-soft);
}
.article-body code {
    font-family: var(--mono);
    font-size: 0.85em;
    background: var(--accent-soft);
    padding: 0.1em 0.4em;
    border-radius: 3px;
}
.article-body a { text-decoration: underline; text-underline-offset: 0.25em; }
.article-body img {
    display: block;
    max-width: 100%;
    height: auto;
    margin: 1.5rem auto;
    border: 1px solid var(--rule);
}

.tag-list {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 2.2rem;
}
.tag-list a {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    font-size: 0.8rem;
    color: var(--accent);
    background: var(--accent-soft);
    border: 1px solid var(--accent-line);
}
.tag-list a:hover { text-decoration: none; background: var(--accent); color: #fff; }

.adjacent {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1px;
    background: var(--rule);
    border: 1px solid var(--rule);
    margin-top: 3.5rem;
}
.adjacent-item {
    background: var(--card);
    padding: 1.1rem 1.3rem;
    display: block;
    color: var(--ink);
}
.adjacent-item:hover { text-decoration: none; background: var(--accent-soft); }
.adjacent-item:only-child { grid-column: 1 / -1; }
.adjacent-label {
    display: block;
    font-family: var(--mono);
    font-size: 0.72rem;
    color: var(--ink-faint);
    letter-spacing: 0.1em;
    margin-bottom: 0.3rem;
}
.adjacent-title { font-size: 0.92rem; line-height: 1.6; }

.more { margin-top: 3rem; }
.more-title {
    font-family: var(--mono);
    font-size: 0.78rem;
    font-weight: 400;
    color: var(--ink-faint);
    letter-spacing: 0.15em;
    margin-bottom: 0.8rem;
}
.more-list { list-style: none; }
.more-list li {
    border-top: 1px solid var(--rule);
    padding: 0.55rem 0;
    font-size: 0.92rem;
}
.more-list a { color: var(--ink); }
.more-list a:hover { color: var(--accent); }

/* ---- 404 ---- */
.notfound { padding-top: 4rem; }
.notfound-code {
    font-family: var(--mono);
    font-size: 0.85rem;
    color: var(--ink-faint);
    letter-spacing: 0.2em;
}
.notfound-title {
    font-family: var(--serif);
    font-size: 2.2rem;
    font-weight: 900;
    margin: 0.5rem 0 1rem;
}

/* ---- 頁尾 ---- */
.site-foot {
    max-width: 60rem;
    margin: 0 auto;
    padding: 1.5rem 1.25rem 2.5rem;
    font-size: 0.8rem;
    color: var(--ink-faint);
    border-top: 1px solid var(--rule);
}
.site-foot a { color: var(--ink-faint); }

/* ---- 行動版:書脊轉為頂欄 ---- */
@media (max-width: 720px) {
    html { font-size: 16px; }
    .page { display: block; }
    .spine {
        border-right: 0;
        border-bottom: 1px solid var(--rule);
        padding: 0.8rem 0;
        justify-content: flex-start;
    }
    .spine span { writing-mode: horizontal-tb; letter-spacing: 0.3em; font-size: 0.9rem; }
    .content { padding-top: 2rem; }
    .masthead-title { font-size: 2rem; }
    .article-title { font-size: 1.6rem; }
    .entry-item { flex-direction: column; gap: 0.2rem; }
    .entry-date { padding-top: 0; }
    .entry-thumb { display: none; }
    .adjacent { grid-template-columns: 1fr; }
    .article-body { text-align: left; }
}

@media (prefers-reduced-motion: no-preference) {
    a, .adjacent-item { transition: color 0.15s ease, background 0.15s ease; }
}