:root {
  --paper: #fffaf0;
  --surface: #ffffff;
  --ink: #2b2118;
  --ink-2: #5f5346;
  --ink-3: #978a79;
  --line: #f3e7cf;
  --accent: #ff7a1a;
  --accent-soft: #fff0d9;
  --accent-ink: #c2410c;
  --sun: #ffcf3f;
  --sun-soft: #fff4c7;
  --green: #0f8a5f;
  --shadow: 0 1px 2px rgb(180 110 20 / .06), 0 10px 28px -14px rgb(200 120 20 / .28);
  --serif: "Noto Serif TC", "Songti TC", "PMingLiU", serif;
  --sans: "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", system-ui, sans-serif;
  --radius: 14px;
  color-scheme: light;
}
/* 預設一律明亮配色；深色只在使用者按下切換按鈕時套用 */
:root[data-theme="dark"] .thumb { --tl: 19%; --ts: 32%; --tk: 72%; }
:root[data-theme="dark"] {
  --paper: #1a1610; --surface: #241f17; --ink: #f5ecdc; --ink-2: #c9bba4; --ink-3: #93856f;
  --line: #3a3226; --accent: #ff8a3d; --accent-soft: #3f2814; --accent-ink: #ffb27a; --green: #6fd3a6;
  --sun: #ffcf3f; --sun-soft: #3a3117;
  --shadow: 0 1px 2px rgb(0 0 0 / .3), 0 10px 30px -14px rgb(0 0 0 / .6); color-scheme: dark;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0; background: var(--paper); color: var(--ink);
  font: 400 16px/1.75 var(--sans); letter-spacing: .01em;
}
a { color: inherit; }
img { max-width: 100%; height: auto; }
.wrap { max-width: 1160px; margin: 0 auto; padding: 0 24px; }
.wrap-narrow { max-width: 760px; margin: 0 auto; padding: 0 24px; }
.muted { color: var(--ink-3); }

/* ---------- header / footer ---------- */
.site-header {
  position: sticky; top: 0; z-index: 10;
  background: color-mix(in srgb, var(--paper) 86%, transparent);
  backdrop-filter: blur(10px); border-bottom: 1px solid var(--line);
}
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; font: 900 18px/1 var(--serif); letter-spacing: .02em; }
.brand.small { font-size: 16px; }
.logo-ball { width: 28px; height: 28px; flex: none; }
.logo-ball circle { fill: var(--accent); }
.logo-ball path { stroke: var(--paper); stroke-width: 1.6; }
.site-header nav { display: flex; align-items: center; gap: 4px; }
.site-header nav a { text-decoration: none; padding: 8px 12px; border-radius: 999px; color: var(--ink-2); font-weight: 500; font-size: 15px; }
.site-header nav a:hover { background: var(--accent-soft); color: var(--accent-ink); }
.theme-btn { border: 0; background: none; width: 38px; height: 38px; border-radius: 50%; cursor: pointer; color: var(--ink-2); display: grid; place-items: center; }
.theme-btn:hover { background: var(--accent-soft); color: var(--accent-ink); }
.theme-btn svg { width: 18px; height: 18px; fill: currentColor; }

.site-footer { margin-top: 96px; border-top: 1px solid var(--line); padding: 40px 0 56px; color: var(--ink-2); font-size: 14px; }
.site-footer p { margin: 8px 0; }

/* ---------- hero ---------- */
.hero {
  padding: 72px 0 56px; position: relative; overflow: hidden;
  background: linear-gradient(180deg, var(--sun-soft) 0%, var(--paper) 100%);
}
.hero::before {  /* 太陽 */
  content: ""; position: absolute; width: 360px; height: 360px; right: 6%; top: -140px; border-radius: 50%;
  background: radial-gradient(circle, var(--sun) 0 42%, color-mix(in srgb, var(--sun) 35%, transparent) 43% 58%, transparent 70%);
  opacity: .9; pointer-events: none;
}
.hero::after {  /* 桌球 */
  content: ""; position: absolute; width: 56px; height: 56px; right: 30%; top: 64px; border-radius: 50%;
  background: radial-gradient(circle at 35% 30%, #fff 0 12%, var(--accent) 60%);
  box-shadow: 0 10px 24px -8px color-mix(in srgb, var(--accent) 60%, transparent);
  pointer-events: none;
}
.hero-inner { display: grid; grid-template-columns: 1fr 300px; gap: 48px; align-items: end; position: relative; }
.kicker { margin: 0 0 16px; color: var(--accent-ink); font-weight: 700; font-size: 13px; letter-spacing: .18em; }
.hero h1 { margin: 0; font: 900 clamp(40px, 7vw, 76px)/1.15 var(--serif); letter-spacing: .02em; }
.hero h1 em {
  font-style: normal; color: var(--accent);
  background: linear-gradient(transparent 64%, color-mix(in srgb, var(--sun) 70%, transparent) 64% 92%, transparent 92%);
}
.lede { max-width: 560px; color: var(--ink-2); font-size: 17px; margin: 24px 0 32px; }
.stats { display: flex; gap: 0; margin: 0; flex-wrap: wrap; }
.stats div { padding: 0 28px; border-left: 1px solid var(--line); }
.stats div:first-child { padding-left: 0; border-left: 0; }
.stats dt { font-size: 13px; color: var(--ink-3); }
.stats dd { margin: 0; font: 900 32px/1.2 var(--serif); font-variant-numeric: tabular-nums; }
.hero-card {
  display: flex; flex-direction: column; gap: 6px; text-decoration: none; padding: 22px 24px;
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow);
  transition: transform .2s, border-color .2s;
}
.hero-card:hover { transform: translateY(-3px); border-color: var(--accent); }
.hero-card small { color: var(--accent-ink); font-weight: 700; letter-spacing: .12em; font-size: 12px; }
.hero-card strong { font: 600 19px/1.5 var(--serif); }
.hero-card span { color: var(--ink-3); font-size: 13px; }

/* ---------- toolbar ---------- */
.toolbar { position: sticky; top: 64px; z-index: 5; background: var(--paper); padding: 16px 0 8px; border-bottom: 1px solid var(--line); }
.search { display: flex; align-items: center; gap: 10px; background: var(--surface); border: 1px solid var(--line); border-radius: 999px; padding: 0 18px; max-width: 460px; }
.search:focus-within { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
.search svg { width: 18px; height: 18px; fill: none; stroke: var(--ink-3); stroke-width: 2; flex: none; }
.search input { border: 0; background: none; outline: none; font: inherit; color: var(--ink); padding: 11px 0; width: 100%; }
.topics { display: flex; gap: 8px; overflow-x: auto; padding: 14px 0 6px; scrollbar-width: none; }
.topics::-webkit-scrollbar { display: none; }
.topic {
  flex: none; font: 500 14px/1 var(--sans); color: var(--ink-2); background: transparent; cursor: pointer;
  border: 1px solid var(--line); border-radius: 999px; padding: 9px 14px; display: flex; gap: 8px; align-items: center;
}
.topic span { font-size: 12px; color: var(--ink-3); font-variant-numeric: tabular-nums; }
.topic:hover { border-color: var(--accent); color: var(--accent-ink); }
.topic { background: var(--surface); }
.topic.active { background: var(--accent); color: #fff; border-color: var(--accent); box-shadow: 0 6px 16px -8px var(--accent); }
.topic.active span { color: rgb(255 255 255 / .8); }
.result { margin: 4px 0 0; font-size: 13px; color: var(--ink-3); min-height: 1.2em; }

/* ---------- year sections & cards ---------- */
.year { display: grid; grid-template-columns: 120px 1fr; gap: 32px; padding: 48px 0 8px; }
.year[hidden] { display: none; }
.year-label { margin: 0; position: sticky; top: 210px; align-self: start; display: flex; flex-direction: column; }
.year-label span { font: 900 44px/1 var(--serif); color: var(--accent); letter-spacing: -.01em; }
.year-label small { font: 500 13px/2 var(--sans); color: var(--ink-3); }
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 20px; }
.card {
  display: flex; flex-direction: column; text-decoration: none; background: var(--surface);
  border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow);
  transition: transform .2s ease, border-color .2s ease;
}
.card[hidden] { display: none; }
.card:hover { transform: translateY(-4px); border-color: color-mix(in srgb, var(--accent) 60%, var(--line)); }
.card:hover h3 { color: var(--accent-ink); }
.thumb { aspect-ratio: 16 / 9; background: var(--accent-soft); overflow: hidden; }
.thumb img { width: 100%; height: 100%; object-fit: cover; display: block; transition: transform .4s ease; }
.card:hover .thumb img { transform: scale(1.04); }
.thumb { --h: 14; --tl: 89%; --ts: 95%; --tk: 34%; }
.thumb.none {
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 10px; position: relative;
  background:
    radial-gradient(circle at 84% 22%, hsl(var(--h) var(--ts) calc(var(--tl) - 8%)) 0 16%, transparent 16.5%),
    repeating-linear-gradient(135deg, transparent 0 14px, hsl(var(--h) var(--ts) calc(var(--tl) - 4%)) 14px 15px),
    hsl(var(--h) var(--ts) var(--tl));
}
.thumb.none b { font-size: 34px; line-height: 1; filter: saturate(.9); }
.thumb.none span { font: 900 17px/1 var(--serif); color: hsl(var(--h) 45% var(--tk)); letter-spacing: .1em; }
.card-body { padding: 16px 18px 18px; display: flex; flex-direction: column; flex: 1; }
.card-tags { display: flex; gap: 6px; flex-wrap: wrap; min-height: 20px; }
.card-tags span { font-size: 12px; font-weight: 700; color: var(--green); letter-spacing: .04em; }
.card h3 { margin: 6px 0 8px; font: 600 18px/1.5 var(--serif); transition: color .2s; }
.card p { margin: 0 0 14px; color: var(--ink-2); font-size: 14px; line-height: 1.7;
  display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.card-meta { margin-top: auto; display: flex; justify-content: space-between; font-size: 13px; color: var(--ink-3); font-variant-numeric: tabular-nums; }
.empty { text-align: center; color: var(--ink-3); padding: 80px 0; }

/* ---------- post ---------- */
.post { padding-top: 56px; }
.post-head { margin-bottom: 40px; padding-bottom: 28px; border-bottom: 1px solid var(--line); }
.tags { display: flex; gap: 8px; flex-wrap: wrap; }
.tag { font-size: 13px; font-weight: 700; color: var(--accent-ink); background: var(--accent-soft); text-decoration: none; padding: 4px 12px; border-radius: 999px; }
.tag:hover { background: var(--accent); color: #fff; }
.post-head h1 { font: 900 clamp(28px, 5vw, 42px)/1.35 var(--serif); margin: 16px 0 16px; letter-spacing: .01em; }
.post-meta { display: flex; flex-wrap: wrap; gap: 6px 18px; color: var(--ink-3); font-size: 14px; font-variant-numeric: tabular-nums; }
.post-meta > * + *::before { content: "·"; margin-right: 18px; color: var(--line); }

.prose { font-size: 17px; line-height: 1.95; overflow-wrap: anywhere; }
.prose p { margin: 0 0 1.2em; }
.prose a { color: var(--accent-ink); text-decoration-thickness: 1px; text-underline-offset: 3px; }
.prose img { border-radius: 10px; display: block; margin: 1.4em auto; max-height: 80vh; width: auto; }
.prose a:has(> img) { display: block; }
.prose figure { margin: 1.6em 0; }
.prose figure img { margin: 0 auto; }
.prose figcaption { text-align: center; color: var(--ink-3); font-size: 14px; margin-top: 10px; }
.prose hr { border: 0; border-top: 1px dashed var(--line); margin: 2.4em 0; }
.prose h1, .prose h2, .prose h3, .prose h4 { font-family: var(--serif); line-height: 1.5; margin: 1.8em 0 .6em; }
.prose blockquote { margin: 1.5em 0; padding: 4px 0 4px 20px; border-left: 3px solid var(--accent); color: var(--ink-2); }
.prose ul, .prose ol { padding-left: 1.4em; }
.prose table { border-collapse: collapse; max-width: 100%; display: block; overflow-x: auto; }
.prose td, .prose th { border: 1px solid var(--line); padding: 6px 10px; }
.prose pre, .prose code { font-family: ui-monospace, Consolas, monospace; font-size: .88em; }
.prose pre { background: var(--surface); border: 1px solid var(--line); padding: 14px 16px; border-radius: 10px; overflow-x: auto; }
.prose div { max-width: 100%; }
.video { margin: 1.6em 0; aspect-ratio: 16 / 9; border-radius: 12px; overflow: hidden; background: #000; }
.video iframe { width: 100%; height: 100%; border: 0; display: block; }
.lost {
  display: flex; align-items: center; justify-content: center; gap: 8px; margin: 1.2em auto; max-width: 420px;
  padding: 18px; border: 1px dashed var(--line); border-radius: 10px; color: var(--ink-3); font-size: 14px; background: var(--surface);
}
.lost svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 1.8; }

.pager { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin: 56px 0 0; }
.pager a { text-decoration: none; padding: 18px 20px; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); display: flex; flex-direction: column; gap: 4px; transition: border-color .2s; }
.pager a:hover { border-color: var(--accent); }
.pager .next { text-align: right; }
.pager small { color: var(--ink-3); font-size: 13px; }
.pager span { font: 600 16px/1.5 var(--serif); }

.back { margin-top: 48px; }
.back a { color: var(--accent-ink); font-weight: 500; text-decoration: none; }

/* ---------- responsive ---------- */
@media (max-width: 860px) {
  .hero-inner { grid-template-columns: 1fr; gap: 32px; }
  .year { grid-template-columns: 1fr; gap: 16px; padding-top: 36px; }
  .year-label { position: static; flex-direction: row; align-items: baseline; gap: 12px; }
}
@media (max-width: 560px) {
  .wrap, .wrap-narrow { padding: 0 16px; }
  .hero { padding: 48px 0 32px; }
  .stats div { padding: 0 16px; }
  .stats dd { font-size: 26px; }
  .brand { font-size: 15px; white-space: nowrap; }
  .logo-ball { width: 24px; height: 24px; }
  .site-header nav { gap: 0; }
  .site-header nav a { padding: 8px 7px; white-space: nowrap; font-size: 14px; }
  .toolbar { position: static; }
  .pager { grid-template-columns: 1fr; }
  .pager .next { text-align: left; }
  .prose { font-size: 16px; }
}
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; scroll-behavior: auto !important; }
}