/* =========================================================
   天火藏書 — 書卷氣 Theme
   宣紙 × 墨 × 印章硃紅
   ========================================================= */

/* -------- Tokens -------- */
:root {
  /* Light (default) — 宣紙 */
  --bg:           #f1e9d8;
  --bg-paper:     #f7f0df;
  --surface:      #fbf5e8;
  --surface-sunk: #ece3cd;
  --ink:          #221c16;
  --ink-soft:     #4a3f33;
  --muted:        #7a6c58;
  --rule:         #c8b99e;
  --rule-soft:    #d9cdb7;
  --seal:         #8b2c20;        /* 印章硃紅 */
  --seal-ink:     #fbf5e8;
  --seal-soft:    rgba(139,44,32,.08);
  --gold:         #9a7b3a;

  --font-serif:   "Noto Serif TC", "Source Han Serif TC", "Songti TC", "PMingLiU", Georgia, serif;
  --font-display: "Cormorant Garamond", "Noto Serif TC", Georgia, serif;
  --font-sans:    "Noto Sans TC", -apple-system, "PingFang TC", "Microsoft JhengHei", system-ui, sans-serif;
  --font-mono:    "JetBrains Mono", "IBM Plex Mono", ui-monospace, monospace;

  --radius:       2px;
  --radius-card:  4px;
  --nav-h:        72px;
  --nav-sub-h:    38px;
  --maxw:         1080px;
  --tx:           220ms cubic-bezier(.2,.7,.3,1);

  color-scheme: light;
}

:root[data-theme="dark"] {
  --bg:           #14110e;
  --bg-paper:     #1a1612;
  --surface:      #1c1814;
  --surface-sunk: #100d0a;
  --ink:          #ebe2cf;
  --ink-soft:     #c8bda6;
  --muted:        #8e8166;
  --rule:         #3a322a;
  --rule-soft:    #2a241e;
  --seal:         #c97864;
  --seal-ink:     #14110e;
  --seal-soft:    rgba(201,120,100,.10);
  --gold:         #c9a972;

  color-scheme: dark;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg:           #14110e;
    --bg-paper:     #1a1612;
    --surface:      #1c1814;
    --surface-sunk: #100d0a;
    --ink:          #ebe2cf;
    --ink-soft:     #c8bda6;
    --muted:        #8e8166;
    --rule:         #3a322a;
    --rule-soft:    #2a241e;
    --seal:         #c97864;
    --seal-ink:     #14110e;
    --seal-soft:    rgba(201,120,100,.10);
    --gold:         #c9a972;
    color-scheme: dark;
  }
}

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

body {
  font-family: var(--font-serif);
  background: var(--bg);
  /* very subtle paper texture via layered gradients (no images) */
  background-image:
    radial-gradient(1200px 800px at 20% 0%, var(--bg-paper), transparent 60%),
    radial-gradient(900px 700px at 100% 100%, var(--bg-paper), transparent 55%);
  color: var(--ink);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
  padding-top: calc(var(--nav-h) + var(--nav-sub-h));
  text-rendering: optimizeLegibility;
}

@media (max-width: 840px) {
  body { padding-top: var(--nav-h); }
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; display: block; }

::selection { background: var(--seal); color: var(--seal-ink); }

/* ----------------- Skip link ----------------- */
.skip-link {
  position: absolute; left: 12px; top: 12px;
  background: var(--seal); color: var(--seal-ink);
  padding: 8px 14px; border-radius: var(--radius);
  transform: translateY(-150%); transition: transform var(--tx);
  z-index: 2000; font-family: var(--font-sans); font-size: .9rem;
}
.skip-link:focus { transform: translateY(0); outline: none; }

/* ----------------- Header ----------------- */
.site-header {
  position: fixed; top: 0; left: 0; right: 0;
  background: color-mix(in oklab, var(--bg) 92%, transparent);
  backdrop-filter: blur(10px) saturate(120%);
  -webkit-backdrop-filter: blur(10px) saturate(120%);
  border-bottom: 1px solid var(--rule-soft);
  z-index: 1200;
}
.nav-wrap {
  max-width: var(--maxw);
  height: var(--nav-h);
  margin: 0 auto;
  padding: 0 28px;
  display: flex; align-items: center; justify-content: space-between;
  gap: 20px;
}
.brand { display: flex; gap: 14px; align-items: center; }

.seal-mark {
  width: 42px; height: 42px;
  display: grid; place-items: center;
  background: var(--seal);
  color: var(--seal-ink);
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 20px;
  letter-spacing: -0.02em;
  border-radius: 1px;
  position: relative;
  flex-shrink: 0;
  /* gives an embossed-stamp feel */
  box-shadow:
    inset 0 0 0 1px color-mix(in oklab, var(--seal) 70%, black),
    inset 0 0 0 3px var(--seal),
    inset 0 0 0 4px color-mix(in oklab, var(--seal) 80%, var(--seal-ink) 20%);
}
.seal-mark::before {
  /* worn edges */
  content: "";
  position: absolute; inset: 0;
  background:
    radial-gradient(circle at 20% 30%, transparent 30%, var(--seal) 32%),
    radial-gradient(circle at 80% 70%, transparent 25%, var(--seal) 27%);
  mix-blend-mode: lighten;
  opacity: .15;
  pointer-events: none;
}

.brand-text { display: flex; flex-direction: column; line-height: 1.1; }
.brand-text .name {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 1.1rem;
  letter-spacing: .12em;
  color: var(--ink);
}
.brand-text .sub {
  font-family: var(--font-sans);
  font-size: .72rem;
  letter-spacing: .25em;
  color: var(--muted);
  margin-top: 4px;
  text-transform: uppercase;
}

.primary-nav ul {
  display: flex; gap: 2px; list-style: none; margin: 0; padding: 0;
  font-family: var(--font-serif);
  align-items: center;
}
.primary-nav a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 16px;
  color: var(--ink-soft);
  font-size: 1rem;
  letter-spacing: .12em;
  position: relative;
  transition: color var(--tx);
}
.primary-nav a .fmt-tag {
  font-family: var(--font-display);
  font-style: italic;
  font-size: .72rem;
  letter-spacing: .04em;
  color: var(--muted);
  text-transform: uppercase;
  font-weight: 400;
}
.primary-nav a:hover, .primary-nav a:focus-visible {
  color: var(--seal);
}
.primary-nav a:hover .fmt-tag { color: var(--seal); opacity: .7; }
.primary-nav a::after {
  content: "";
  position: absolute;
  left: 16px; right: 16px; bottom: 6px;
  height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--tx);
}
.primary-nav a:hover::after, .primary-nav a:focus-visible::after { transform: scaleX(1); }
.primary-nav a.active {
  color: var(--seal);
}
.primary-nav a.active::after {
  transform: scaleX(1);
  background: var(--seal);
  height: 2px;
}
.primary-nav a.active .fmt-tag { color: var(--seal); opacity: .8; }

/* ----- Sub nav (二排輔助列) ----- */
.sub-nav {
  border-top: 1px solid var(--rule-soft);
  background: color-mix(in oklab, var(--bg-paper) 60%, transparent);
}
.sub-nav-wrap {
  max-width: var(--maxw);
  margin: 0 auto;
  height: var(--nav-sub-h);
  padding: 0 28px;
  display: flex; align-items: center; justify-content: space-between;
  gap: 20px;
  font-family: var(--font-serif);
  font-size: .82rem;
  color: var(--muted);
  letter-spacing: .08em;
}
.sub-nav-group { display: flex; align-items: center; gap: 0; flex-wrap: wrap; }
.sub-nav-group .lead {
  font-family: var(--font-sans);
  font-size: .7rem;
  letter-spacing: .25em;
  color: var(--muted);
  margin-right: 14px;
  text-transform: uppercase;
}
.sub-nav-group a {
  color: var(--ink-soft);
  padding: 4px 12px;
  border-right: 1px solid var(--rule-soft);
  transition: color var(--tx);
  white-space: nowrap;
}
.sub-nav-group a:first-of-type { padding-left: 0; }
.sub-nav-group a:last-of-type  { border-right: none; padding-right: 0; }
.sub-nav-group a:hover { color: var(--seal); }
.sub-nav-group a.active { color: var(--seal); }

@media (max-width: 840px) {
  .sub-nav { display: none; }
}

.shop-link {
  font-family: var(--font-serif);
  font-size: .92rem;
  letter-spacing: .25em;
  padding: 8px 16px;
  border: 1px solid var(--seal);
  color: var(--seal);
  border-radius: var(--radius);
  transition: var(--tx);
  white-space: nowrap;
}
.shop-link:hover { background: var(--seal); color: var(--seal-ink); }

/* ---- 未讀小紅點（公告 / 書房有更新時提示，進頁後消失）---- */
.nav-has-update { position: relative; }
.nav-has-update::after {
  content: "";
  position: absolute;
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--seal);
  pointer-events: none;
}
.sub-nav-group a.nav-has-update::after { top: 1px; right: 5px; }
.shop-link.nav-has-update::after { top: -3px; right: -3px; box-shadow: 0 0 0 2px var(--bg); }
.mobile-utility-inner a.nav-has-update::after { top: 50%; right: 4px; transform: translateY(-50%); }

.theme-toggle, .nav-toggle {
  width: 38px; height: 38px;
  display: grid; place-items: center;
  background: transparent;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  color: var(--ink-soft);
  cursor: pointer;
  transition: var(--tx);
  font-family: inherit;
}
.theme-toggle:hover, .nav-toggle:hover {
  color: var(--seal);
  border-color: var(--seal);
}
.theme-toggle svg, .nav-toggle svg { width: 18px; height: 18px; }
.theme-toggle .icon-sun { display: none; }
:root[data-theme="dark"] .theme-toggle .icon-moon { display: none; }
:root[data-theme="dark"] .theme-toggle .icon-sun  { display: block; }

.nav-right { display: flex; align-items: center; gap: 12px; }

.nav-toggle { display: none; }

/* mobile-utility 容器：桌機完全不顯示，避免被 site-chrome 注入後溢出 */
.mobile-utility { display: none; }

/* ----------------- Hero ----------------- */
main {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 56px 28px 80px;
}

.hero {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 48px;
  align-items: end;
  padding-bottom: 56px;
  border-bottom: 1px solid var(--rule-soft);
  margin-bottom: 56px;
  position: relative;
}
.hero::after {
  /* second hairline — classical double-rule */
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -4px;
  height: 1px;
  background: var(--rule-soft);
  opacity: .55;
}

.hero-eyebrow {
  font-family: var(--font-sans);
  font-size: .72rem;
  letter-spacing: .4em;
  color: var(--seal);
  text-transform: uppercase;
  margin-bottom: 18px;
  display: flex; align-items: center; gap: 12px;
}
.hero-eyebrow::before {
  content: ""; display: inline-block;
  width: 28px; height: 1px; background: var(--seal); opacity: .6;
}

.hero h1 {
  font-family: var(--font-serif);
  font-size: clamp(2.2rem, 5vw, 3.4rem);
  font-weight: 500;
  letter-spacing: .04em;
  line-height: 1.2;
  margin: 0 0 24px;
  color: var(--ink);
}
.hero h1 .em {
  color: var(--seal);
  font-weight: 600;
}

.hero p.lede {
  font-family: var(--font-serif);
  font-size: 1.08rem;
  color: var(--ink-soft);
  max-width: 56ch;
  margin: 0;
  line-height: 1.8;
}

/* 直書豎排副標 — 像書脊 */
.hero-vertical {
  writing-mode: vertical-rl;
  -webkit-writing-mode: vertical-rl;
  font-family: var(--font-serif);
  font-size: .82rem;
  letter-spacing: .5em;
  color: var(--muted);
  border-left: 1px solid var(--rule);
  border-right: 1px solid var(--rule);
  padding: 14px 8px;
  align-self: stretch;
}

/* ----------------- Section heading ----------------- */
.sec-head {
  display: flex; align-items: baseline; gap: 18px;
  margin: 0 0 28px;
}
.sec-num {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 400;
  font-size: 1.2rem;
  color: var(--seal);
  letter-spacing: .05em;
  white-space: nowrap;
}
.sec-num .cn {
  font-family: var(--font-serif);
  font-style: normal;
  margin-right: 6px;
}
.sec-title {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  font-weight: 500;
  letter-spacing: .12em;
  color: var(--ink);
  margin: 0;
  flex: 1;
  border-bottom: 1px solid var(--rule-soft);
  padding-bottom: 8px;
}

/* ----------------- Card / Panel ----------------- */
.panel {
  background: var(--surface);
  border: 1px solid var(--rule-soft);
  border-radius: var(--radius-card);
  padding: 40px 44px;
  margin-bottom: 36px;
  position: relative;
}
.panel + .panel { margin-top: 0; }

@media (max-width: 640px) {
  .panel { padding: 28px 22px; }
}

/* ----------------- Drop zone ----------------- */
.drop-zone {
  border: 1px dashed var(--rule);
  background:
    repeating-linear-gradient(
      135deg,
      transparent 0 18px,
      color-mix(in oklab, var(--rule-soft) 50%, transparent) 18px 19px
    ),
    var(--surface-sunk);
  border-radius: var(--radius-card);
  padding: 48px 28px;
  text-align: center;
  cursor: pointer;
  transition: var(--tx);
  margin-bottom: 36px;
}
.drop-zone:hover, .drop-zone.dragover {
  border-color: var(--seal);
  border-style: solid;
  background: var(--surface-sunk);
}
.drop-zone .glyph {
  font-family: var(--font-serif);
  font-size: 2.4rem;
  color: var(--seal);
  line-height: 1;
  margin-bottom: 14px;
  letter-spacing: -.04em;
}
.drop-zone h3 {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-weight: 500;
  letter-spacing: .15em;
  color: var(--ink);
  margin: 0 0 8px;
}
.drop-zone p {
  font-family: var(--font-sans);
  font-size: .82rem;
  color: var(--muted);
  margin: 4px 0;
  letter-spacing: .04em;
}
.drop-zone .formats {
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: .05em;
  color: var(--ink-soft);
  margin-top: 12px;
}
.drop-zone .note {
  margin-top: 14px;
  color: var(--seal);
  font-family: var(--font-sans);
  font-size: .8rem;
}

/* ----------------- Form grid ----------------- */
.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px 36px;
  margin-bottom: 36px;
}
@media (max-width: 640px) {
  .form-grid { grid-template-columns: 1fr; gap: 24px; }
}

.field { display: flex; flex-direction: column; gap: 10px; }
.field-label {
  font-family: var(--font-serif);
  font-size: .92rem;
  letter-spacing: .18em;
  color: var(--ink);
  font-weight: 500;
  display: flex; align-items: baseline; justify-content: space-between;
}
.field-label .hint {
  font-family: var(--font-sans);
  font-size: .72rem;
  letter-spacing: .05em;
  color: var(--muted);
  font-weight: 400;
}
.field-label .hint a { color: var(--seal); border-bottom: 1px solid currentColor; padding-bottom: 1px; }

input[type="text"], input[type="number"], select {
  width: 100%;
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--rule);
  color: var(--ink);
  padding: 10px 2px;
  font-family: var(--font-serif);
  font-size: 1rem;
  letter-spacing: .02em;
  outline: none;
  transition: border-color var(--tx);
  border-radius: 0;
}
input[type="text"]::placeholder { color: var(--muted); font-style: italic; opacity: .65; }
input[type="text"]:focus, input[type="number"]:focus, select:focus {
  border-bottom-color: var(--seal);
}

/* Radio chip group */
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  display: inline-flex; align-items: center; gap: 6px;
  font-family: var(--font-serif);
  font-size: .92rem;
  letter-spacing: .12em;
  padding: 8px 16px;
  border: 1px solid var(--rule);
  border-radius: 999px;
  color: var(--ink-soft);
  cursor: pointer;
  user-select: none;
  transition: var(--tx);
  background: transparent;
}
.chip input { position: absolute; opacity: 0; pointer-events: none; }
.chip:hover { color: var(--ink); border-color: var(--ink-soft); }
.chip:has(input:checked) {
  background: var(--seal);
  color: var(--seal-ink);
  border-color: var(--seal);
}
/* fallback for browsers without :has */
.chip.is-checked {
  background: var(--seal);
  color: var(--seal-ink);
  border-color: var(--seal);
}

/* Checkbox chips */
.chip.chip-check::before {
  content: "";
  width: 14px; height: 14px;
  border: 1px solid currentColor;
  display: inline-block;
  border-radius: 1px;
  transition: var(--tx);
  background: transparent;
}
.chip.chip-check:has(input:checked)::before, .chip.chip-check.is-checked::before {
  background: var(--seal-ink);
  position: relative;
}
.chip.chip-check:has(input:checked), .chip.chip-check.is-checked { background: var(--seal); color: var(--seal-ink); }

/* ----------------- Submit button ----------------- */
.actions { display: flex; justify-content: center; padding-top: 16px; }
.btn {
  font-family: var(--font-serif);
  font-size: 1.02rem;
  letter-spacing: .35em;
  padding: 16px 56px 16px 60px;  /* extra letter-spacing eats right */
  border: 1px solid var(--ink);
  background: var(--ink);
  color: var(--bg-paper);
  cursor: pointer;
  border-radius: var(--radius);
  transition: var(--tx);
  position: relative;
}
.btn:hover { background: var(--seal); border-color: var(--seal); color: var(--seal-ink); }
.btn:focus-visible { outline: 2px solid var(--seal); outline-offset: 3px; }

.btn-ghost {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--rule);
  letter-spacing: .2em;
  padding: 12px 28px;
  font-size: .92rem;
}
.btn-ghost:hover {
  background: transparent;
  border-color: var(--seal);
  color: var(--seal);
}

/* ----------------- Tools list (其他工具) ----------------- */
.tools-list {
  list-style: none;
  margin: 0; padding: 0;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0;
  border-top: 1px solid var(--rule-soft);
}
@media (max-width: 640px) {
  .tools-list { grid-template-columns: 1fr; }
}
.tools-list li {
  border-bottom: 1px solid var(--rule-soft);
}
.tools-list li:nth-child(odd) {
  border-right: 1px solid var(--rule-soft);
}
@media (max-width: 640px) {
  .tools-list li:nth-child(odd) { border-right: none; }
}
.tools-list a {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 18px;
  align-items: center;
  padding: 22px 4px;
  transition: var(--tx);
}
.tools-list a:hover { color: var(--seal); }
.tools-list .idx {
  font-family: var(--font-display);
  font-style: italic;
  color: var(--seal);
  font-size: 1.1rem;
  width: 28px;
}
.tools-list .name {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  letter-spacing: .1em;
}
.tools-list .name small {
  display: block;
  font-family: var(--font-sans);
  font-size: .72rem;
  letter-spacing: .12em;
  color: var(--muted);
  margin-top: 4px;
  font-weight: 400;
}
.tools-list .arrow {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  color: var(--muted);
  transition: var(--tx);
}
.tools-list a:hover .arrow { color: var(--seal); transform: translateX(4px); }

/* ----------------- Progress ----------------- */
.progress-section { margin-top: 28px; }
.status-header {
  display: flex; justify-content: space-between;
  font-family: var(--font-sans); font-size: .82rem;
  letter-spacing: .08em;
  color: var(--muted);
  margin-bottom: 10px;
}
.progress-track {
  height: 2px;
  background: var(--rule-soft);
  overflow: hidden;
}
.progress-fill {
  height: 100%; width: 0;
  background: var(--seal);
  transition: width .3s ease;
}

/* 處理階段沒有百分比可走 → 進度軌道改跑不定量往復動畫，
   明確表示「仍在運作」，而非卡在 100%。 */
.progress-track.is-working .progress-fill {
  width: 40%;
  background: linear-gradient(90deg, transparent, var(--seal), transparent);
  transition: none;
  animation: progressIndeterminate 1.2s ease-in-out infinite;
}
@keyframes progressIndeterminate {
  0%   { transform: translateX(-100%); }
  100% { transform: translateX(350%); }
}

/* 處理階段主控台左緣封泥色呼吸閃爍，作為「正在處理」的明顯視覺提示。 */
#console-output.is-working { animation: consoleWorking 1.4s ease-in-out infinite; }
@keyframes consoleWorking {
  0%, 100% { border-left-color: var(--seal); }
  50%      { border-left-color: var(--rule-soft); }
}

@media (prefers-reduced-motion: reduce) {
  .progress-track.is-working .progress-fill,
  #console-output.is-working { animation: none; }
  .progress-track.is-working .progress-fill { background: var(--seal); }
}

/* ----------------- Console ----------------- */
#console-output {
  background: var(--surface-sunk);
  border: 1px solid var(--rule-soft);
  border-left: 2px solid var(--seal);
  padding: 18px 22px;
  font-family: var(--font-mono);
  font-size: .8rem;
  color: var(--ink-soft);
  max-height: 240px;
  overflow-y: auto;
  margin-top: 24px;
  border-radius: 0 var(--radius-card) var(--radius-card) 0;
}
.log-line { padding: 2px 0; }
.log-line .ts { color: var(--muted); margin-right: 10px; }
.log-line .tag { color: var(--seal); margin-right: 8px; }

/* ----------------- Footer ----------------- */
.site-footer {
  border-top: 1px solid var(--rule-soft);
  padding: 56px 28px 36px;
  font-family: var(--font-sans);
  color: var(--muted);
  background: var(--bg-paper);
  margin-top: 80px;
}
.footer-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 36px;
}
.footer-col h4 {
  font-family: var(--font-sans);
  font-size: .68rem;
  letter-spacing: .3em;
  color: var(--muted);
  text-transform: uppercase;
  margin: 0 0 16px;
  font-weight: 400;
}
.footer-col ul { list-style: none; margin: 0; padding: 0; }
.footer-col li { margin-bottom: 10px; }
.footer-col a {
  font-family: var(--font-serif);
  color: var(--ink-soft);
  font-size: .92rem;
  letter-spacing: .08em;
  transition: color var(--tx);
}
.footer-col a:hover { color: var(--seal); }
.footer-brand .colophon {
  font-family: var(--font-serif);
  letter-spacing: .35em;
  color: var(--ink);
  font-size: 1.1rem;
  margin-bottom: 14px;
}
.footer-brand p {
  font-family: var(--font-serif);
  color: var(--muted);
  font-size: .88rem;
  line-height: 1.7;
  margin: 0;
}
.footer-bottom {
  max-width: var(--maxw);
  margin: 48px auto 0;
  padding-top: 24px;
  border-top: 1px solid var(--rule-soft);
  font-size: .78rem;
  letter-spacing: .15em;
  text-align: center;
}
@media (max-width: 840px) {
  .footer-inner { grid-template-columns: 1fr 1fr; gap: 28px 24px; }
  .footer-brand { grid-column: 1 / -1; }
}
@media (max-width: 480px) {
  .footer-inner { grid-template-columns: 1fr; }
}

/* ----------------- Mobile nav ----------------- */
@media (max-width: 840px) {
  .nav-wrap { padding: 0 20px; }
  .primary-nav, .mobile-utility {
    position: absolute;
    left: 0; right: 0;
    background: var(--surface);
    border-bottom: 1px solid var(--rule-soft);
    display: none;
  }
  .primary-nav { top: var(--nav-h); }
  .primary-nav.open { display: block; }
  .primary-nav ul {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 8px 0;
  }
  .primary-nav a {
    display: flex;
    padding: 14px 24px;
    border-bottom: 1px solid var(--rule-soft);
    font-size: 1rem;
    justify-content: space-between;
  }
  .primary-nav li:last-child a { border-bottom: 1px solid var(--rule-soft); }
  .primary-nav a::after { display: none; }
  .primary-nav.open + .mobile-utility { display: block; }
  .mobile-utility {
    top: 0;
    transform: translateY(0);
    /* container itself stays; rendered inside .open block */
  }
  .mobile-utility-inner {
    padding: 16px 24px;
    font-family: var(--font-sans);
    font-size: .78rem;
    letter-spacing: .15em;
    color: var(--muted);
  }
  .mobile-utility-inner h4 {
    font-family: var(--font-sans);
    font-size: .68rem;
    letter-spacing: .3em;
    color: var(--muted);
    margin: 12px 0 8px;
    text-transform: uppercase;
  }
  .mobile-utility-inner a {
    display: block;
    padding: 10px 0;
    font-family: var(--font-serif);
    color: var(--ink-soft);
    font-size: .95rem;
    letter-spacing: .12em;
    border-bottom: 1px dashed var(--rule-soft);
  }
  .mobile-utility-inner a:last-child { border-bottom: none; }
  .mobile-utility-inner a.mobile-shop-feature {
    border-bottom: none;
    text-decoration: underline double var(--seal);
    text-decoration-thickness: 1px;
    text-underline-offset: 5px;
  }
  .nav-toggle { display: grid; }
  .shop-link { display: none; }
  .hero { grid-template-columns: 1fr; }
  .hero-vertical { display: none; }
  .brand-text .sub { display: none; }
  main { padding: 36px 22px 60px; }
}

@media (max-width: 480px) {
  .brand-text .name { font-size: 1rem; }
  .panel { padding: 26px 20px; }
  .btn { width: 100%; padding: 16px 24px; letter-spacing: .25em; }
}

/* =========================================================
   Page-specific components
   ========================================================= */

/* ----- Page intro (hero variant for non-home pages) ----- */
.page-intro {
  padding: 32px 0 48px;
  border-bottom: 1px solid var(--rule-soft);
  margin-bottom: 56px;
  position: relative;
}
.page-intro::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -4px;
  height: 1px;
  background: var(--rule-soft);
  opacity: .55;
}
.page-intro .hero-eyebrow { margin-bottom: 16px; }
.page-intro h1 {
  font-family: var(--font-serif);
  font-size: clamp(1.9rem, 4vw, 2.6rem);
  font-weight: 500;
  letter-spacing: .08em;
  margin: 0 0 14px;
  color: var(--ink);
}
.page-intro p {
  font-family: var(--font-serif);
  color: var(--ink-soft);
  max-width: 56ch;
  margin: 0;
  font-size: 1.02rem;
  line-height: 1.8;
}

/* ----- Shop / 書房 ----- */
.shop-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px 32px;
  margin-top: 8px;
}
@media (max-width: 840px) { .shop-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 480px) { .shop-grid { grid-template-columns: 1fr; gap: 36px; } }

.book-card {
  display: flex;
  flex-direction: column;
}
.book-cover {
  aspect-ratio: 3 / 4;
  background: linear-gradient(160deg, var(--surface-sunk), color-mix(in oklab, var(--surface-sunk) 70%, var(--seal) 8%));
  border: 1px solid var(--rule);
  border-radius: 2px;
  position: relative;
  overflow: hidden;
  box-shadow:
    inset 0 0 0 1px color-mix(in oklab, var(--rule) 60%, transparent),
    8px 8px 0 -3px color-mix(in oklab, var(--ink) 8%, transparent),
    14px 14px 24px -10px color-mix(in oklab, var(--ink) 18%, transparent);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 22px 18px;
  transition: var(--tx);
  cursor: pointer;
}
.book-card:hover .book-cover {
  transform: translateY(-4px);
  box-shadow:
    inset 0 0 0 1px var(--seal),
    8px 8px 0 -3px color-mix(in oklab, var(--seal) 12%, transparent),
    14px 14px 32px -8px color-mix(in oklab, var(--ink) 22%, transparent);
}
.book-cover::before {
  /* fine ornamental frame */
  content: "";
  position: absolute;
  inset: 10px;
  border: 1px solid var(--rule-soft);
  pointer-events: none;
}
.book-cover .cover-title {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 1.4rem;
  letter-spacing: .25em;
  color: var(--ink);
  line-height: 1.5;
  writing-mode: vertical-rl;
  -webkit-writing-mode: vertical-rl;
  height: 100%;
  margin: 0 auto;
  text-align: start;
  position: relative;
  z-index: 1;
}
.book-cover .cover-author {
  font-family: var(--font-serif);
  font-size: .72rem;
  letter-spacing: .25em;
  color: var(--muted);
  writing-mode: vertical-rl;
  -webkit-writing-mode: vertical-rl;
  align-self: flex-end;
  position: relative;
  z-index: 1;
}
.book-cover .cover-seal {
  position: absolute;
  bottom: 22px; left: 18px;
  width: 26px; height: 26px;
  background: var(--seal);
  color: var(--seal-ink);
  display: grid; place-items: center;
  font-family: var(--font-serif);
  font-size: 11px;
  font-weight: 700;
  z-index: 2;
  letter-spacing: 0;
}
.book-meta {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-top: 18px;
  gap: 12px;
}
.book-title {
  font-family: var(--font-serif);
  font-size: 1.02rem;
  font-weight: 500;
  letter-spacing: .12em;
  color: var(--ink);
  margin: 0;
}
.book-author {
  font-family: var(--font-sans);
  font-size: .78rem;
  letter-spacing: .12em;
  color: var(--muted);
  margin: 4px 0 0;
}
.book-price {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 1.1rem;
  color: var(--seal);
  white-space: nowrap;
}
.book-price .currency { font-size: .8rem; margin-right: 2px; opacity: .8; }
.book-tags {
  margin-top: 8px;
  display: flex; gap: 8px; flex-wrap: wrap;
}
.book-tag {
  font-family: var(--font-sans);
  font-size: .68rem;
  letter-spacing: .15em;
  color: var(--muted);
  padding: 2px 8px;
  border: 1px solid var(--rule-soft);
  border-radius: 1px;
}

/* ----- FAQ ----- */
.faq-list {
  list-style: none;
  margin: 0; padding: 0;
}
.faq-item {
  border-bottom: 1px solid var(--rule-soft);
  padding: 6px 0;
}
.faq-item summary {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: baseline;
  gap: 18px;
  padding: 22px 4px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-serif);
  font-size: 1.05rem;
  color: var(--ink);
  letter-spacing: .08em;
  transition: color var(--tx);
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary:hover { color: var(--seal); }
.faq-item .q-mark {
  font-family: var(--font-display);
  font-style: italic;
  color: var(--seal);
  font-size: 1.25rem;
  width: 32px;
}
.faq-item .q-mark::before { content: "問·"; font-family: var(--font-serif); font-style: normal; }
.faq-item summary .toggle {
  font-family: var(--font-serif);
  color: var(--muted);
  font-size: 1.2rem;
  width: 14px;
  transition: transform var(--tx);
  line-height: 1;
}
.faq-item[open] summary .toggle { transform: rotate(45deg); color: var(--seal); }
.faq-answer {
  padding: 0 4px 26px 54px;
  font-family: var(--font-serif);
  color: var(--ink-soft);
  font-size: .98rem;
  line-height: 1.85;
}
.faq-answer::before {
  content: "答·";
  color: var(--seal);
  margin-right: 4px;
  font-weight: 500;
}
@media (max-width: 480px) {
  .faq-answer { padding-left: 4px; }
  .faq-item summary { grid-template-columns: auto 1fr auto; gap: 10px; font-size: 1rem; }
}

/* ----- Guide / 使用說明 ----- */
.guide-steps {
  list-style: none;
  margin: 0; padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0;
}
.guide-step {
  display: grid;
  grid-template-columns: 90px 1fr;
  gap: 32px;
  padding: 28px 0;
  border-bottom: 1px solid var(--rule-soft);
}
.guide-step:last-child { border-bottom: none; }
.guide-step .num {
  font-family: var(--font-display);
  font-style: italic;
  color: var(--seal);
  font-size: 2.4rem;
  line-height: 1;
}
.guide-step .num .cn {
  display: block;
  font-family: var(--font-serif);
  font-style: normal;
  font-size: 1rem;
  letter-spacing: .2em;
  color: var(--ink-soft);
  margin-top: 6px;
}
.guide-step h3 {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  font-weight: 500;
  letter-spacing: .12em;
  color: var(--ink);
  margin: 0 0 10px;
}
.guide-step p {
  font-family: var(--font-serif);
  color: var(--ink-soft);
  font-size: .98rem;
  line-height: 1.85;
  margin: 0;
}
@media (max-width: 640px) {
  .guide-step { grid-template-columns: 1fr; gap: 12px; }
  .guide-step .num { font-size: 1.8rem; }
}

/* ----- Feedback / 留言板 ----- */
.msg-list {
  list-style: none; margin: 32px 0 0; padding: 0;
  display: flex; flex-direction: column; gap: 0;
}
.msg-item {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 28px;
  padding: 26px 0;
  border-bottom: 1px solid var(--rule-soft);
}
.msg-item:last-child { border-bottom: none; }
.msg-meta {
  font-family: var(--font-sans);
  font-size: .78rem;
  color: var(--muted);
  letter-spacing: .12em;
  line-height: 1.6;
}
.msg-meta .who {
  display: block;
  font-family: var(--font-serif);
  font-size: 1rem;
  letter-spacing: .15em;
  color: var(--ink);
  margin-bottom: 4px;
}
.msg-body {
  font-family: var(--font-serif);
  font-size: 1rem;
  color: var(--ink);
  line-height: 1.85;
}
.msg-body .reply {
  margin-top: 14px;
  padding: 14px 16px;
  background: var(--surface-sunk);
  border-left: 2px solid var(--seal);
  font-size: .92rem;
  color: var(--ink-soft);
}
.msg-body .reply::before {
  content: "管理員回覆 · ";
  font-family: var(--font-sans);
  font-size: .72rem;
  letter-spacing: .2em;
  color: var(--seal);
  text-transform: uppercase;
}
.msg-form { margin-top: 0; }
.msg-form textarea {
  width: 100%;
  min-height: 130px;
  background: transparent;
  border: 1px solid var(--rule);
  color: var(--ink);
  padding: 14px 16px;
  font-family: var(--font-serif);
  font-size: 1rem;
  line-height: 1.7;
  border-radius: var(--radius-card);
  resize: vertical;
  outline: none;
  transition: border-color var(--tx);
}
.msg-form textarea:focus { border-color: var(--seal); }
.msg-form textarea::placeholder { color: var(--muted); font-style: italic; opacity: .65; }

@media (max-width: 640px) {
  .msg-item { grid-template-columns: 1fr; gap: 10px; }
}

/* ----- Tag pill for shop categories ----- */
.tag-rail {
  display: flex; gap: 8px; flex-wrap: wrap;
  margin-bottom: 32px;
}
.tag-rail .pill {
  font-family: var(--font-serif);
  font-size: .88rem;
  letter-spacing: .15em;
  padding: 6px 16px;
  border: 1px solid var(--rule);
  color: var(--ink-soft);
  border-radius: 999px;
  cursor: pointer;
  transition: var(--tx);
}
.tag-rail .pill:hover { color: var(--seal); border-color: var(--seal); }
.tag-rail .pill.active { background: var(--ink); color: var(--bg-paper); border-color: var(--ink); }

/* ----------------- Print ----------------- */
@media print {
  .site-header, .site-footer, .nav-toggle, .theme-toggle { display: none; }
  body { padding-top: 0; background: white; color: black; }
}


/* =========================================================
   Legacy-compat — for existing sub-tool pages' DOM
   （epubslim / epub2md / kepub2epub / mobislim 既有 IDs）
   ========================================================= */

/* tool-card behaves like panel */
.tool-card {
  background: var(--surface);
  border: 1px solid var(--rule-soft);
  border-radius: var(--radius-card);
  padding: 40px 44px;
  margin-bottom: 36px;
}
@media (max-width: 640px) { .tool-card { padding: 28px 22px; } }

/* settings-area: grid of controls */
.settings-area {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 24px 28px;
  margin: 28px 0 0;
}
.control-group { display: flex; flex-direction: column; gap: 10px; }
.control-group label {
  font-family: var(--font-serif);
  font-size: .92rem;
  letter-spacing: .15em;
  color: var(--ink);
  font-weight: 500;
}

select {
  background-color: transparent;
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%237a6c58' stroke-width='1.5'><path d='M6 9l6 6 6-6'/></svg>");
  background-repeat: no-repeat;
  background-position: right 4px center;
  background-size: 18px;
  padding-right: 28px;
  cursor: pointer;
}

.checkbox-wrapper {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-serif);
  font-size: .96rem;
  color: var(--ink);
  cursor: pointer;
  padding: 8px 0;
}
.checkbox-wrapper input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--seal);
  cursor: pointer;
  flex-shrink: 0;
}

/* Drop zone (supports both #drop and #drop-zone) */
.drop-zone .icon-upload {
  width: 56px;
  height: 56px;
  margin: 0 auto 12px;
  color: var(--seal);
  display: block;
}
#file-info {
  margin-top: 12px;
  font-family: var(--font-serif);
  color: var(--seal);
  font-size: .92rem;
  letter-spacing: .12em;
}

/* Buttons */
.btn-primary {
  font-family: var(--font-serif);
  font-size: 1.02rem;
  letter-spacing: .3em;
  padding: 14px 48px;
  border: 1px solid var(--ink);
  background: var(--ink);
  color: var(--bg-paper);
  cursor: pointer;
  border-radius: var(--radius);
  transition: var(--tx);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
}
.btn-primary:hover:not([disabled]) {
  background: var(--seal);
  border-color: var(--seal);
  color: var(--seal-ink);
}
.btn-primary[disabled], .btn-primary[aria-disabled="true"] {
  opacity: .4;
  cursor: not-allowed;
}
.btn-primary svg { width: 18px; height: 18px; }
.btn-primary-full {
  width: 100%;
  padding: 16px 24px;
}
.btn-secondary {
  font-family: var(--font-serif);
  font-size: .96rem;
  letter-spacing: .22em;
  padding: 14px 28px;
  border: 1px solid var(--rule);
  background: transparent;
  color: var(--ink);
  cursor: pointer;
  border-radius: var(--radius);
  transition: var(--tx);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
}
.btn-secondary:hover {
  border-color: var(--seal);
  color: var(--seal);
}

/* badge-pro — scholarly version */
.badge-pro {
  font-family: var(--font-display);
  font-style: italic;
  font-size: .68rem;
  letter-spacing: .15em;
  padding: 3px 10px;
  border: 1px solid var(--seal);
  color: var(--seal);
  vertical-align: 6px;
  margin-left: 12px;
  border-radius: 1px;
  background: transparent;
  font-weight: 400;
  text-transform: uppercase;
}

/* Info block */
.info-block {
  background: var(--surface-sunk);
  border: 1px solid var(--rule-soft);
  border-left: 2px solid var(--seal);
  padding: 16px 20px;
  font-family: var(--font-serif);
  color: var(--ink-soft);
  font-size: .95rem;
  line-height: 1.7;
  margin: 28px 0;
  border-radius: 0 var(--radius-card) var(--radius-card) 0;
}
.info-block strong { color: var(--seal); font-weight: 600; }

/* Log box (epubslim/epub2md etc.) */
.log-box {
  background: var(--surface-sunk);
  border: 1px solid var(--rule-soft);
  border-left: 2px solid var(--seal);
  padding: 14px 18px;
  font-family: var(--font-mono);
  font-size: .76rem;
  color: var(--ink-soft);
  max-height: 220px;
  overflow-y: auto;
  margin-top: 16px;
  border-radius: 0 var(--radius-card) var(--radius-card) 0;
  line-height: 1.65;
}
.log-box::-webkit-scrollbar { width: 6px; }
.log-box::-webkit-scrollbar-thumb { background: var(--rule); border-radius: 3px; }

/* Result panel */
.result-section {
  margin-top: 32px;
  padding-top: 32px;
  border-top: 1px solid var(--rule-soft);
}
.result-section h2 {
  font-family: var(--font-serif);
  font-size: 1.4rem;
  font-weight: 500;
  letter-spacing: .15em;
  color: var(--seal) !important;
  margin: 0;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin: 24px 0;
}
@media (max-width: 640px) { .stats-grid { grid-template-columns: 1fr; } }
.stat-item {
  background: var(--surface-sunk);
  border: 1px solid var(--rule-soft);
  border-radius: var(--radius-card);
  padding: 22px 16px;
  text-align: center;
}
.stat-item:last-child {
  background: var(--seal-soft);
  border-color: color-mix(in oklab, var(--seal) 40%, transparent);
}
.stat-val {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 1.9rem;
  font-weight: 500;
  color: var(--ink);
  margin-bottom: 6px;
  line-height: 1;
}
.stat-item:last-child .stat-val { color: var(--seal); }
.stat-label {
  font-family: var(--font-sans);
  font-size: .68rem;
  letter-spacing: .25em;
  color: var(--muted);
  text-transform: uppercase;
  margin-top: 4px;
}
.text-highlight { color: var(--seal); }

.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-top: 22px;
}
@media (max-width: 640px) { .grid-2 { grid-template-columns: 1fr; } }

.preview-box {
  background: var(--surface-sunk);
  border: 1px solid var(--rule-soft);
  border-radius: var(--radius-card);
  padding: 18px 22px;
  max-height: 280px;
  overflow-y: auto;
  font-family: var(--font-serif);
  font-size: .92rem;
  line-height: 1.8;
  color: var(--ink-soft);
  margin: 12px 0 24px;
  white-space: pre-wrap;
}

.thumbs-scroll {
  display: flex;
  gap: 12px;
  overflow-x: auto;
  padding: 12px 0;
  margin-bottom: 24px;
}
.thumbs-scroll img {
  height: 120px;
  border: 1px solid var(--rule-soft);
  border-radius: 2px;
}

.srcs-info {
  font-family: var(--font-sans);
  font-size: .85rem;
  color: var(--muted);
  margin: 16px 0;
  letter-spacing: .05em;
}

/* utility classes */
.hidden { display: none !important; }
.fade-in { animation: fadeIn 360ms ease-out; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: translateY(0); } }
.muted { color: var(--muted); }

/* error display */
#error-display {
  margin-top: 12px;
  padding: 12px 16px;
  background: color-mix(in oklab, var(--seal) 10%, transparent);
  border-left: 2px solid var(--seal);
  border-radius: 0 var(--radius-card) var(--radius-card) 0;
  color: var(--seal);
  font-family: var(--font-serif);
  font-size: .9rem;
}
#error-display:empty { display: none; }
#error-display .log-line { color: var(--seal); border: none; padding: 0; margin: 0; }

/* status + percent text (used by tool-card progress) */
#status {
  font-family: var(--font-serif);
  letter-spacing: .12em;
  color: var(--ink-soft);
}
#percent-text {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 1.1rem;
  color: var(--seal) !important;
}

/* Book-info-modal (preserved from existing index.php) override */
.bim-overlay {
  background: color-mix(in oklab, var(--ink) 60%, transparent);
  backdrop-filter: blur(4px);
}
.bim-box {
  background: var(--surface) !important;
  border: 1px solid var(--rule) !important;
  color: var(--ink) !important;
}
.bim-heading {
  font-family: var(--font-serif);
  letter-spacing: .15em;
  color: var(--ink) !important;
  font-weight: 500 !important;
}
.bim-field label {
  font-family: var(--font-serif);
  letter-spacing: .12em;
  color: var(--ink-soft) !important;
}
.bim-field input {
  background: transparent !important;
  border: none !important;
  border-bottom: 1px solid var(--rule) !important;
  border-radius: 0 !important;
  color: var(--ink) !important;
  font-family: var(--font-serif) !important;
  padding: 8px 2px !important;
}
.bim-field input:focus { border-bottom-color: var(--seal) !important; }
.bim-err { color: var(--seal) !important; }
#bim-cancel {
  background: transparent !important;
  border: 1px solid var(--rule) !important;
  color: var(--ink-soft) !important;
  font-family: var(--font-serif);
  letter-spacing: .2em;
}
#bim-confirm {
  background: var(--ink) !important;
  color: var(--bg-paper) !important;
  font-family: var(--font-serif);
  letter-spacing: .25em;
}

/* ----- Essay / 文章式版面（緣起本文） ----- */
.essay { padding: 36px 44px; }
.essay p {
  font-family: var(--font-serif);
  color: var(--ink);
  font-size: 1.02rem;
  line-height: 1.95;
  letter-spacing: .02em;
  margin: 0 0 1.1em;
}
.essay p:last-child { margin-bottom: 0; }
.essay-sign {
  margin-top: 1.6em;
  text-align: right;
  font-family: var(--font-display);
  font-style: italic;
  color: var(--seal);
  font-size: .95rem;
  letter-spacing: .14em;
}
.essay-sign::before { content: "— "; color: var(--muted); }
@media (max-width: 640px) {
  .essay { padding: 28px 22px; }
}

/* ----- Annal / 編年式條列（後記、公告、修正歷史共用） ----- */
.annal-list { list-style: none; margin: 0; padding: 0; }
.annal-item {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 32px;
  padding: 30px 0;
  border-bottom: 1px solid var(--rule-soft);
}
.annal-item:first-child { padding-top: 4px; }
.annal-item:last-child { border-bottom: none; padding-bottom: 4px; }
.annal-when {
  font-family: var(--font-display);
  font-style: italic;
  color: var(--seal);
  font-size: 1.6rem;
  line-height: 1.1;
  letter-spacing: .04em;
}
.annal-when .md {
  display: block;
  font-family: var(--font-serif);
  font-style: normal;
  font-size: .82rem;
  letter-spacing: .22em;
  color: var(--ink-soft);
  margin-top: 8px;
}
.annal-body h3 {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-weight: 500;
  letter-spacing: .12em;
  color: var(--ink);
  margin: 0 0 12px;
}
.annal-body p {
  font-family: var(--font-serif);
  color: var(--ink-soft);
  font-size: .98rem;
  line-height: 1.9;
  margin: 0 0 .9em;
}
.annal-body p:last-child { margin-bottom: 0; }
.annal-body .tags {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 4px;
}
.annal-body .tags .tag {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: .72rem;
  letter-spacing: .2em;
  color: var(--muted);
  border: 1px solid var(--rule);
  padding: 2px 10px;
  border-radius: 999px;
}
@media (max-width: 640px) {
  .annal-item { grid-template-columns: 1fr; gap: 10px; }
  .annal-when { font-size: 1.35rem; }
}

/* ----- Shop / 實體封面圖卡片變體 -----
   讀墨封面多為 5:8 或 2:3，比預設的 3:4 容器窄。aspect-ratio 改 2:3 以
   接近實際封面比例，img 用 contain 完整呈現（不裁切）；左右剩餘空間
   由背景紙色填補，視覺上仍齊整。 */
.book-cover.has-image {
  aspect-ratio: 2 / 3;
  padding: 0;
  background: var(--surface-sunk);
  overflow: hidden;
}
.book-cover.has-image img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
  z-index: 0;
  transition: var(--tx);
}
.book-card:hover .book-cover.has-image img { transform: scale(1.03); }
.book-cover.has-image::before {
  /* 圖片邊框會壓住封面內容；改成不繪製，仍保留 .book-cover 母樣式的陰影 */
  display: none;
}
.book-cover.has-image .cover-seal {
  bottom: 12px; left: 12px;
  box-shadow: 0 1px 6px color-mix(in oklab, var(--ink) 40%, transparent);
  z-index: 2;
}

/* ----- Shop / ISBN 列（純資訊，可供使用者選取複製貼到其他搜尋） ----- */
.book-isbn {
  margin-top: 8px;
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-family: var(--font-sans);
  font-size: .74rem;
  letter-spacing: .12em;
  color: var(--muted);
}
.book-isbn .label {
  font-family: var(--font-serif);
  font-size: .72rem;
  letter-spacing: .22em;
  color: var(--seal);
}
.book-isbn .num {
  font-family: var(--font-mono);
  letter-spacing: .04em;
  color: var(--ink-soft);
  user-select: all;  /* 一鍵全選方便複製 */
}

/* ----- Shop / 簡介摺疊 ----- */
.book-desc {
  margin-top: 14px;
  border-top: 1px solid var(--rule-soft);
}
.book-desc summary {
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  list-style: none;
  padding: 12px 2px 10px;
  font-family: var(--font-serif);
  font-size: .92rem;
  letter-spacing: .14em;
  color: var(--ink-soft);
  transition: color var(--tx);
}
.book-desc summary::-webkit-details-marker { display: none; }
.book-desc summary:hover { color: var(--seal); }
.book-desc summary .toggle {
  font-family: var(--font-serif);
  color: var(--muted);
  font-size: 1.1rem;
  width: 14px;
  line-height: 1;
  transition: transform var(--tx);
  text-align: right;
}
.book-desc[open] summary .toggle { transform: rotate(45deg); color: var(--seal); }
.book-desc-body {
  padding: 4px 2px 14px;
  font-family: var(--font-serif);
  color: var(--ink-soft);
  font-size: .92rem;
  line-height: 1.85;
}
.book-desc-body p { margin: 0 0 .8em; }
.book-desc-body p:last-child { margin-bottom: 0; }

/* ----- Shop / 三通路購買連結 ----- */
.book-buy {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 6px;
  margin-top: 14px;
}
.buy-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 9px 8px;
  font-family: var(--font-serif);
  font-size: .82rem;
  letter-spacing: .14em;
  color: var(--ink-soft);
  background: transparent;
  border: 1px solid var(--rule);
  border-radius: 2px;
  text-decoration: none;
  transition: var(--tx);
  white-space: nowrap;
}
.buy-btn:hover {
  color: var(--seal-ink);
  background: var(--seal);
  border-color: var(--seal);
}
.buy-btn.buy-readmoo:hover { /* 讀墨：主通路，沿用 --seal 強調 */ }
.buy-btn.buy-play:hover,
.buy-btn.buy-apple:hover {
  /* Google Play / Apple Books：通路較弱，hover 用淡墨色而非 seal */
  color: var(--bg-paper);
  background: var(--ink);
  border-color: var(--ink);
}
@media (max-width: 380px) {
  .book-buy { grid-template-columns: 1fr; }
}
#bim-confirm:hover { background: var(--seal) !important; }