/* weiweialvin.tech — 方向 A「對照」
   版面核心：每段中文與英文並排對齊，像一份中英對照稿。 */

:root {
  --paper: #F6F6F3;
  --ink: #1D1D1B;
  --muted: #64645F;
  --rule: #D6D6D0;
  --mark: #B42318;      /* 校對紅：段落編號、連結滑過、焦點 */
  --mark-dark: #8A1A12;

  --zh: "Noto Serif TC", "Songti TC", "PMingLiU", serif;
  --en: "Newsreader", "Iowan Old Style", Georgia, serif;

  --gutter: 4rem;       /* 中英兩欄之間的編號欄 */
  --side: clamp(1.25rem, 6vw, 6.25rem);
  --block: clamp(4.5rem, 9vw, 8rem);
}

*, *::before, *::after { box-sizing: border-box; }

html {
  color-scheme: light;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--zh);
  font-size: 1.0625rem;
  line-height: 1.9;
  font-kerning: normal;
  overflow-wrap: break-word;
}

:lang(en) { font-family: var(--en); }

a { color: inherit; text-decoration-thickness: 1px; text-underline-offset: 0.2em; }
a:hover { text-decoration-thickness: 2px; }
::selection { background: #F3D3CF; color: var(--ink); }
code { font-family: "SFMono-Regular", Menlo, Consolas, monospace; font-size: 0.875em; padding: 0.125em 0.25em; background: #ECECE6; border-radius: 2px; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }
a, button { touch-action: manipulation; -webkit-tap-highlight-color: rgba(180, 35, 24, 0.12); }
h1, h2, .hero p { text-wrap: balance; }
[id] { scroll-margin-top: 2rem; }
:focus-visible { outline: 2px solid var(--mark); outline-offset: 3px; border-radius: 1px; }

.wrap { max-width: 80rem; margin-inline: auto; padding-inline: var(--side); }

.skip {
  position: absolute; left: 1rem; top: -4rem; z-index: 10;
  padding: 0.5rem 0.75rem; background: var(--ink); color: var(--paper);
}
.skip:focus { top: 1rem; }

/* 待補內容 */
.ph { color: var(--muted); border-bottom: 1px dashed currentColor; }

/* ---------- 頁首 ---------- */
.site-header {
  display: flex; flex-wrap: wrap; align-items: baseline;
  gap: 1rem 2rem; padding-top: 2rem;
}
.brand { display: flex; align-items: baseline; gap: 0.5rem; margin-right: auto; text-decoration: none; }
.brand-en { font-size: 1.5rem; line-height: 1.2; }
.brand-zh { font-size: 1rem; }

.site-nav { display: flex; flex-wrap: wrap; gap: 0 2rem; }
.site-nav a {
  display: inline-flex; align-items: baseline; gap: 0.25rem;
  min-height: 2.75rem; padding-block: 0.5rem; text-decoration: none;
}
.site-nav a .en { color: var(--muted); font-size: 1rem; }
.site-nav a:hover { box-shadow: inset 0 -1px 0 var(--ink); }
.site-nav a[aria-current="page"] { box-shadow: inset 0 -2px 0 var(--mark); }

.view-switch { display: flex; gap: 0.25rem; margin-left: auto; }
.view-switch button {
  min-height: 2.75rem; padding: 0 0.5rem;
  border: 0; background: none; color: var(--muted);
  font: inherit; font-size: 0.9375rem; cursor: pointer;
}
.view-switch button:hover { color: var(--ink); }
.view-switch button[aria-pressed="true"] { color: var(--ink); box-shadow: inset 0 -2px 0 var(--mark); }

/* ---------- 對照網格 ---------- */
.seg,
.pair,
.pair-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) var(--gutter) minmax(0, 1fr);
  align-items: baseline;
}
.seg > .zh, .pair > .zh, .pair-head > .zh { grid-column: 1; }
.seg > .no, .pair > .no { grid-column: 2; }
.seg > .en, .pair > .en, .pair-head > .en { grid-column: 3; }
.seg > p { margin: 0; }

.no {
  font-family: var(--en);
  font-size: 0.9375rem;
  font-variant-numeric: lining-nums;
  color: var(--mark);
  text-align: center;
}

/* ---------- 首頁開場 ---------- */
.hero {
  display: flex; flex-direction: column; gap: 3rem;
  padding-top: clamp(4.5rem, 10vw, 8.5rem);
}
.hero .zh { font-size: clamp(1.75rem, 3.2vw, 2.75rem); line-height: 1.45; font-weight: 600; }
.hero .en { font-size: clamp(1.625rem, 3vw, 2.625rem); line-height: 1.2; }

/* ---------- 區塊與標題 ---------- */
.block { margin-top: var(--block); }

.pair-head {
  margin: 0; padding-bottom: 1rem;
  border-bottom: 1px solid var(--ink);
  font-size: 1.75rem; line-height: 1.3; font-weight: 700;
}
.pair-head > .en { font-weight: 500; }
.pair-head.small { font-size: 1.375rem; padding-bottom: 0.5rem; }
.page-title { margin-top: clamp(4rem, 8vw, 6.5rem); font-size: clamp(2rem, 4vw, 2.75rem); }

.lede { margin-top: 2rem; max-width: 100%; }
.lede .zh { font-size: 1.1875rem; }
.lede .en { font-size: 1.3125rem; line-height: 1.5; }
.lede + .pairs { margin-top: 3rem; border-top: 1px solid var(--ink); }
.page-title + .block { margin-top: 4rem; }

/* ---------- 對照列表：每列是一個句段，標題／說明／標籤三行逐行對齊 ---------- */
.pairs { list-style: none; margin: 0; padding: 0; }
.pair {
  position: relative;
  padding-block: 2rem;
  border-bottom: 1px solid var(--rule);
}
.pair > .no { grid-row: 1; }
.r-title { grid-row: 1; font-size: 1.375rem; line-height: 1.4; font-weight: 700; }
.r-title.en { font-size: 1.5rem; line-height: 1.3; font-weight: 500; }
.r-body { grid-row: 2; margin-top: 0.5rem; }
.r-body.en { font-size: 1.1875rem; line-height: 1.5; }
.r-tag { grid-row: 3; margin-top: 1rem; font-size: 0.875rem; line-height: 1.5; color: var(--muted); }
.r-tag.en { font-size: 0.9375rem; }

.pair .cover { position: absolute; inset: 0; }
.pair .cover:focus-visible { outline-offset: -2px; }
.pair.is-live:hover .r-title { text-decoration: underline; text-decoration-thickness: 2px; text-underline-offset: 0.2em; }

/* 空狀態 */
.empty { padding-block: 2rem; color: var(--muted); }
.empty .en { font-size: 1.1875rem; line-height: 1.5; }

/* ---------- 關於 ---------- */
.prose-seg { margin-top: 2rem; }
.prose-seg .en { font-size: 1.1875rem; line-height: 1.55; }
.cred { list-style: none; margin: 0; padding: 0; }
.cred li { padding-block: 1rem; border-bottom: 1px solid var(--rule); }
.cred .en { font-size: 1.125rem; }

/* ---------- 文章頁 ---------- */
.post { max-width: 40rem; margin-inline: auto; }
.post-head { margin-top: clamp(4rem, 8vw, 6.5rem); padding-bottom: 2rem; border-bottom: 1px solid var(--ink); }
.post-head .meta { margin: 0; font-size: 0.9375rem; color: var(--muted); }
.post-head .meta a { display: inline-block; padding-block: 0.625rem; text-decoration: none; }
.post-head .meta a:hover { text-decoration: underline; }
.post-head h1 { margin: 1rem 0 0; font-size: clamp(1.75rem, 3.6vw, 2.5rem); line-height: 1.4; font-weight: 700; }
.post-title-en { margin: 0.5rem 0 0; font-size: clamp(1.375rem, 2.6vw, 1.75rem); line-height: 1.3; color: var(--muted); }
.prose { margin-top: 3rem; font-size: 1.125rem; line-height: 2; }
.prose h2 { margin: 3rem 0 0; font-size: 1.375rem; line-height: 1.5; }
.prose p, .prose ul, .prose ol { margin: 1.5rem 0 0; }
.prose blockquote { margin: 2rem 0 0; padding-left: 2em; font-size: 1.25rem; line-height: 1.9; color: var(--muted); }
.prose blockquote p { margin: 0; }
.prose code { font-size: 0.9em; }

/* ---------- 頁尾 ---------- */
.site-footer {
  display: flex; flex-wrap: wrap; justify-content: space-between; align-items: baseline;
  gap: 1rem; padding-block: 2rem 4rem; border-top: 1px solid var(--ink);
  font-size: 0.9375rem; color: var(--muted);
}
.site-footer-outer { margin-top: var(--block); }
.contact { display: flex; flex-wrap: wrap; gap: 0.5rem 1.5rem; list-style: none; margin: 0; padding: 0; }
.domain { margin: 0; }

/* ---------- 單一語言檢視 ---------- */
html[data-view="zh"] .en,
html[data-view="en"] .zh,
html[data-view] .no { display: none; }
html[data-view] .seg,
html[data-view] .pair,
html[data-view] .pair-head { grid-template-columns: minmax(0, 1fr); }
html[data-view] .seg > *,
html[data-view] .pair > *,
html[data-view] .pair-head > * { grid-column: 1; max-width: 40rem; }

/* ---------- 窄螢幕：中文在上、英文在下 ---------- */
@media (max-width: 47.99rem) {
  body { font-size: 1rem; }
  .site-header { padding-top: 1.5rem; gap: 0 1rem; }
  .brand { width: 100%; }
  .site-nav { gap: 0 1rem; }
  .site-nav a .en { display: none; }
  html[data-view="en"] .site-nav a .en { display: inline; }
  html[data-view="en"] .site-nav a .zh { display: none; }
  .view-switch { margin-left: 0; width: 100%; }
  .view-switch button:first-child { padding-left: 0; }

  .seg { grid-template-columns: minmax(0, 1fr); }
  .seg > .zh, .seg > .en { grid-column: 1; }
  .seg > .en { margin-top: 0.5rem; }
  .seg:has(> .no) { grid-template-columns: 1.75rem minmax(0, 1fr); }
  .seg:has(> .no) > .no { grid-column: 1; grid-row: 1 / span 2; text-align: left; }
  .seg:has(> .no) > .zh { grid-column: 2; grid-row: 1; }
  .seg:has(> .no) > .en { grid-column: 2; grid-row: 2; }

  /* 列表：編號在左，中文三行、英文三行依序往下 */
  .pair { grid-template-columns: 1.75rem minmax(0, 1fr); padding-block: 1.5rem; }
  .pair > .zh, .pair > .en { grid-column: 2; grid-row: auto; }
  .pair > .no { grid-column: 1; grid-row: 1; text-align: left; }
  .pair > .r-title.zh { grid-row: 1; }
  .pair > .r-title.en { order: 4; margin-top: 1rem; font-size: 1.25rem; }
  .pair > .r-body.zh { order: 1; }
  .pair > .r-tag.zh { order: 2; }
  .pair > .r-body.en { order: 5; }
  .pair > .r-tag.en { order: 6; }
  .r-tag { margin-top: 0.5rem; }
  html:not([data-view]) .pair > .r-tag.zh,
  html:not([data-view]) .pair > .r-title.same { display: none; }
  html:not([data-view]) .pair > .r-body.en { margin-top: 1rem; }
  html:not([data-view]) .pair > .r-title.en:not(.same) + .no ~ .r-body.en { margin-top: 0.25rem; }
  html[data-view] .pair { grid-template-columns: minmax(0, 1fr); }
  html[data-view] .pair > .zh, html[data-view] .pair > .en { grid-column: 1; }
  html[data-view] .pair > .r-title.en { margin-top: 0; }

  .pair-head { display: flex; flex-wrap: wrap; gap: 0 0.75rem; }
  .hero { gap: 2rem; }
  .r-title { font-size: 1.1875rem; }
  .lede .zh { font-size: 1.0625rem; }
  .lede .en { font-size: 1.1875rem; }
}

@media (prefers-reduced-motion: reduce) {
  * { scroll-behavior: auto !important; transition: none !important; }
}