/* =========================================================================
   Agentic AI Summit '26 Notes — editorial stylesheet
   Zero-build vanilla CSS. Warm-bone editorial palette, serif display type,
   hairline rules, Berkeley blue ink + California gold spot accent.
   ========================================================================= */

/* ---------- design tokens ---------- */
:root, [data-theme="light"] {
  --bg: #FAF8F3;
  --surface: #FFFFFF;
  --surface-2: #F3F0E8;
  --ink: #1C1B18;
  --ink-2: #6E685E;
  --hairline: #E7E2D6;
  --hairline-strong: #D8D2C2;
  --accent: #003262;          /* Berkeley blue */
  --accent-ink: #17457A;
  --gold: #FDB515;            /* California gold — graphic accent only */
  --gold-ink: #8F6400;

  --badge-keynote-bg: #FBF3DB; --badge-keynote-ink: #956400;
  --badge-talk-bg: #E1F0FA;    --badge-talk-ink: #1F5C8F;
  --badge-panel-bg: #EDF3EC;   --badge-panel-ink: #346538;
  --badge-fireside-bg: #FDEBEC;--badge-fireside-ink: #9F2F2D;
  --badge-workshop-bg: #EFEAF8;--badge-workshop-ink: #5D4E9C;
  --badge-misc-bg: #EFEDE6;    --badge-misc-ink: #6E685E;

  --font-serif: "Newsreader", "Noto Serif TC", Georgia, "Times New Roman", serif;
  --font-sans: "Instrument Sans", "Noto Sans TC", -apple-system, "Helvetica Neue", "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;

  --maxw: 1080px;
  --shadow-soft: 0 2px 10px rgba(28, 27, 24, 0.05);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
}

[data-theme="dark"] {
  --bg: #171511;
  --surface: #1F1D18;
  --surface-2: #26231C;
  --ink: #EAE6DB;
  --ink-2: #A39C8C;
  --hairline: #343026;
  --hairline-strong: #453F31;
  --accent: #9DBFE8;
  --accent-ink: #B7D2F2;
  --gold: #FDB515;
  --gold-ink: #E3B75B;

  --badge-keynote-bg: rgba(253, 181, 21, 0.13);  --badge-keynote-ink: #E4C070;
  --badge-talk-bg: rgba(96, 165, 220, 0.14);     --badge-talk-ink: #8FC1E8;
  --badge-panel-bg: rgba(110, 180, 120, 0.13);   --badge-panel-ink: #96C8A0;
  --badge-fireside-bg: rgba(230, 110, 110, 0.13);--badge-fireside-ink: #E29A96;
  --badge-workshop-bg: rgba(150, 130, 220, 0.14);--badge-workshop-ink: #B3A5E3;
  --badge-misc-bg: rgba(160, 155, 140, 0.13);    --badge-misc-ink: #A39C8C;

  --shadow-soft: 0 2px 12px rgba(0, 0, 0, 0.35);
}

/* ---------- base ---------- */
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
a { color: inherit; }
button { font: inherit; color: inherit; background: none; border: none; cursor: pointer; }
::selection { background: rgba(253, 181, 21, 0.35); }

/* subtle warm light spot behind the page (editorial depth, near-invisible) */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(900px 520px at 82% -8%, rgba(253, 181, 21, 0.05), transparent 65%);
  z-index: 0;
}
body > * { position: relative; z-index: 1; }

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--ink);
  color: var(--bg);
  padding: 8px 16px;
  z-index: 50;
}
.skip-link:focus { left: 12px; top: 12px; }

/* ---------- app bar ---------- */
.appbar {
  position: sticky;
  top: 0;
  z-index: 30;
  background: color-mix(in srgb, var(--bg) 86%, transparent);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--hairline);
}
.appbar__inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 12px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  min-width: 0;
}
.brand__logo { color: var(--gold-ink); font-size: 22px; }
.brand__name {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 1.06rem;
  letter-spacing: -0.01em;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.appbar__actions { display: flex; align-items: center; gap: 6px; }

.icon-btn {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 7px 10px;
  border-radius: 8px;
  border: 1px solid transparent;
  color: var(--ink-2);
  transition: color 160ms ease, border-color 160ms ease, background 160ms ease;
}
.icon-btn:hover { color: var(--ink); border-color: var(--hairline-strong); }
.icon-btn .material-symbols-rounded { font-size: 20px; }
.icon-btn__txt { font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.06em; }

.gh-star {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border: 1px solid var(--hairline-strong);
  border-radius: 8px;
  text-decoration: none;
  color: var(--ink-2);
  transition: color 160ms ease, border-color 160ms ease;
}
.gh-star:hover { color: var(--ink); border-color: var(--ink-2); }
.gh-star .material-symbols-rounded { font-size: 17px; color: var(--gold-ink); }
.gh-star__label { font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.05em; }
.gh-star__count { font-family: var(--font-mono); font-size: 0.72rem; }

/* ---------- cross-page nav: editorial underline tabs ---------- */
.pagenav {
  border-bottom: 1px solid var(--hairline);
  background: color-mix(in srgb, var(--bg) 92%, transparent);
}
.pagenav__inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  gap: 4px;
  overflow-x: auto;
  scrollbar-width: none;
}
.pagenav__inner::-webkit-scrollbar { display: none; }
.navpill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 11px 12px 9px;
  text-decoration: none;
  color: var(--ink-2);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  white-space: nowrap;
  border-bottom: 2px solid transparent;
  transition: color 160ms ease;
}
.navpill .material-symbols-rounded { font-size: 15px; opacity: 0.75; }
.navpill:hover { color: var(--ink); }
.navpill--active { color: var(--ink); border-bottom-color: var(--gold); }

/* ---------- page scaffold ---------- */
#page {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 20px 96px;
  min-height: 55vh;
}

.reveal { opacity: 0; transform: translateY(12px); }
.reveal.is-in {
  opacity: 1;
  transform: none;
  transition: opacity 600ms var(--ease-out), transform 600ms var(--ease-out);
  transition-delay: var(--reveal-delay, 0ms);
}
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; }
  html { scroll-behavior: auto; }
}

.kicker {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-2);
}
.kicker::before {
  content: "";
  width: 26px;
  height: 2px;
  background: var(--gold);
  flex: none;
}

/* ---------- hub: hero ---------- */
.hero { padding: 72px 0 36px; }
.hero h1 {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: clamp(2.5rem, 6.5vw, 4.4rem);
  line-height: 1.08;
  letter-spacing: -0.025em;
  margin: 18px 0 20px;
  max-width: 21ch;
}
.hero__lede {
  max-width: 62ch;
  font-size: 1.06rem;
  color: var(--ink-2);
  margin: 0;
}

/* ---------- hub: stats ---------- */
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
  padding: 40px 0 8px;
}
.stat { border-top: 1px solid var(--hairline-strong); padding-top: 14px; }
.stat__value {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: clamp(2rem, 4vw, 2.9rem);
  line-height: 1;
  letter-spacing: -0.02em;
}
.stat__label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-2);
  margin-top: 8px;
}
@media (max-width: 640px) { .stats { grid-template-columns: repeat(2, 1fr); gap: 20px; } }

/* ---------- section headers ---------- */
.sectionhead {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  margin: 72px 0 8px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--hairline-strong);
}
.sectionhead h2 {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: clamp(1.5rem, 3vw, 2rem);
  letter-spacing: -0.02em;
  margin: 0;
}
.sectionhead .kicker::before { display: none; }

/* ---------- hub: day / stage index ---------- */
.dayblock { margin-top: 34px; }
.dayblock h3 {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: var(--ink-2);
  margin: 0 0 4px;
}
.dayrow {
  display: grid;
  grid-template-columns: auto 1fr auto auto;
  align-items: center;
  gap: 16px;
  padding: 18px 4px;
  border-bottom: 1px solid var(--hairline);
  text-decoration: none;
  transition: background 180ms ease;
}
.dayrow:hover { background: color-mix(in srgb, var(--surface-2) 55%, transparent); }
.dayrow__dot { width: 9px; height: 9px; border-radius: 50%; flex: none; }
.dayrow__stage {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: clamp(1.25rem, 2.6vw, 1.6rem);
  letter-spacing: -0.015em;
}
.dayrow:hover .dayrow__stage { text-decoration: underline; text-decoration-color: var(--gold); text-underline-offset: 5px; }
.dayrow__meta { font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.04em; color: var(--ink-2); white-space: nowrap; }
.dayrow__arrow { color: var(--ink-2); font-size: 20px; transition: transform 180ms var(--ease-out), color 180ms ease; }
.dayrow:hover .dayrow__arrow { transform: translateX(4px); color: var(--gold-ink); }

.stage-dot--plenary { background: var(--gold); }
.stage-dot--atlas { background: #5E93C5; }
.stage-dot--nexus { background: #7FAE87; }
.stage-dot--compass { background: #C08A96; }

/* ---------- hub: quotes ---------- */
.quotes {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0;
  border-bottom: 1px solid var(--hairline);
}
.quote {
  padding: 30px 28px 30px 0;
  border-bottom: 1px solid var(--hairline);
}
.quote:nth-child(odd) { border-right: 1px solid var(--hairline); padding-right: 34px; }
.quote:nth-child(even) { padding-left: 34px; }
.quote:nth-last-child(-n+2) { border-bottom: none; }
.quote__text {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 1.18rem;
  line-height: 1.5;
  letter-spacing: -0.005em;
  margin: 0 0 14px;
}
.quote__text::before { content: "“"; color: var(--gold-ink); margin-right: 1px; }
.quote__text::after { content: "”"; color: var(--gold-ink); }
.quote__who { font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.05em; color: var(--ink-2); }
.quote__who strong { color: var(--ink); font-weight: 500; }
.quote__gloss { font-size: 0.86rem; color: var(--ink-2); margin: 8px 0 0; }
@media (max-width: 760px) {
  .quotes { grid-template-columns: 1fr; }
  .quote:nth-child(odd) { border-right: none; padding-right: 0; }
  .quote:nth-child(even) { padding-left: 0; }
  .quote:nth-last-child(-n+2) { border-bottom: 1px solid var(--hairline); }
  .quote:last-child { border-bottom: none; }
}

/* ---------- hub: about ---------- */
.about { display: grid; grid-template-columns: 1fr 2fr; gap: 40px; margin-top: 30px; }
.about__body p { margin: 0 0 16px; color: var(--ink-2); max-width: 68ch; }
.about__body p:first-child { color: var(--ink); }
.about__links { display: flex; flex-wrap: wrap; gap: 10px 22px; margin-top: 22px; padding-top: 18px; border-top: 1px solid var(--hairline); }
.about__links a {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.03em;
  color: var(--ink);
  text-decoration: underline;
  text-decoration-color: var(--hairline-strong);
  text-underline-offset: 4px;
  transition: text-decoration-color 160ms ease;
}
.about__links a:hover { text-decoration-color: var(--gold); }
@media (max-width: 760px) { .about { grid-template-columns: 1fr; gap: 8px; } }

/* ---------- day page: header ---------- */
.pagehead { padding: 60px 0 8px; }
.pagehead h1 {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: clamp(2.2rem, 5.5vw, 3.6rem);
  letter-spacing: -0.025em;
  line-height: 1.08;
  margin: 14px 0 10px;
}
.pagehead__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 22px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  color: var(--ink-2);
}
.pagehead__meta a {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: var(--ink);
  text-decoration: underline;
  text-decoration-color: var(--hairline-strong);
  text-underline-offset: 4px;
}
.pagehead__meta a:hover { text-decoration-color: var(--gold); }
.pagehead__meta .material-symbols-rounded { font-size: 15px; color: var(--ink-2); }

/* ---------- day page: controls ---------- */
.controls {
  position: sticky;
  top: 53px;
  z-index: 20;
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  padding: 18px 0 14px;
  margin-top: 26px;
  border-bottom: 1px solid var(--hairline);
}
.searchwrap { display: flex; align-items: center; gap: 10px; border-bottom: 1px solid var(--hairline-strong); padding-bottom: 10px; }
.searchwrap .material-symbols-rounded { font-size: 20px; color: var(--ink-2); }
#search {
  flex: 1;
  border: none;
  outline: none;
  background: transparent;
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 0.98rem;
  padding: 2px 0;
}
#search::placeholder { color: var(--ink-2); opacity: 0.75; }
.chiprow { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin-top: 12px; }
.chip {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  padding: 6px 12px;
  border: 1px solid var(--hairline-strong);
  border-radius: 999px;
  color: var(--ink-2);
  transition: all 160ms ease;
}
.chip:hover { border-color: var(--ink-2); color: var(--ink); }
.chip.active { background: var(--ink); border-color: var(--ink); color: var(--bg); }
.result-count { margin-left: auto; font-family: var(--font-mono); font-size: 0.7rem; letter-spacing: 0.05em; color: var(--ink-2); }

/* ---------- day page: sessions & talk rows ---------- */
.session-group { margin-top: 44px; }
.session-head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 4px;
}
.session-head__half {
  font-family: var(--font-mono);
  font-size: 0.64rem;
  letter-spacing: 0.1em;
  padding: 3px 8px;
  border: 1px solid var(--hairline-strong);
  border-radius: 4px;
  color: var(--ink-2);
  flex: none;
}
.session-head__label {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gold-ink);
}
.session-head::after { content: ""; flex: 1; height: 1px; background: var(--hairline); }

.talkrow {
  display: grid;
  grid-template-columns: 64px 1fr auto;
  gap: 8px 18px;
  width: 100%;
  text-align: left;
  padding: 18px 6px;
  border-bottom: 1px solid var(--hairline);
  border-radius: 0;
  transition: background 180ms ease;
  align-items: baseline;
}
.talkrow:hover { background: color-mix(in srgb, var(--surface-2) 55%, transparent); }
.talkrow:focus-visible { outline: 2px solid var(--accent); outline-offset: -2px; }
.talkrow__time { font-family: var(--font-mono); font-size: 0.73rem; color: var(--ink-2); letter-spacing: 0.02em; }
.talkrow__main { min-width: 0; }
.talkrow__title {
  font-weight: 600;
  font-size: 1.04rem;
  letter-spacing: -0.008em;
  line-height: 1.4;
}
.talkrow:hover .talkrow__title { text-decoration: underline; text-decoration-color: var(--gold); text-underline-offset: 4px; }
.talkrow__speaker { font-size: 0.85rem; color: var(--ink-2); margin-top: 2px; }
.talkrow__speaker strong { color: var(--ink); font-weight: 500; }
.talkrow__summary {
  font-size: 0.88rem;
  color: var(--ink-2);
  margin-top: 7px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.badge {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: 999px;
  white-space: nowrap;
  justify-self: end;
}
.badge--keynote { background: var(--badge-keynote-bg); color: var(--badge-keynote-ink); }
.badge--talk { background: var(--badge-talk-bg); color: var(--badge-talk-ink); }
.badge--panel { background: var(--badge-panel-bg); color: var(--badge-panel-ink); }
.badge--fireside { background: var(--badge-fireside-bg); color: var(--badge-fireside-ink); }
.badge--workshop { background: var(--badge-workshop-bg); color: var(--badge-workshop-ink); }
.badge--misc { background: var(--badge-misc-bg); color: var(--badge-misc-ink); }

@media (max-width: 640px) {
  .talkrow { grid-template-columns: 1fr auto; }
  .talkrow__time { grid-column: 1; order: 3; margin-top: 6px; }
  .talkrow__main { grid-column: 1 / -1; order: 2; }
  .badge { order: 1; justify-self: start; }
}

.empty {
  padding: 60px 0;
  text-align: center;
  color: var(--ink-2);
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 1.1rem;
}

/* ---------- dialog ---------- */
.dialog {
  border: 1px solid var(--hairline-strong);
  border-radius: 12px;
  background: var(--surface);
  color: var(--ink);
  padding: 0;
  width: min(720px, calc(100vw - 32px));
  max-height: min(82vh, 900px);
  box-shadow: 0 18px 60px rgba(20, 18, 12, 0.22);
}
.dialog::backdrop { background: rgba(24, 22, 16, 0.45); backdrop-filter: blur(3px); }
.dialog__bar {
  display: flex;
  align-items: center;
  padding: 10px 12px 0;
  position: sticky;
  top: 0;
  background: var(--surface);
}
.dialog__spacer { flex: 1; }
.dialog__body { padding: 0 34px 36px; }
.dialog__kicker { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.dialog__session { font-family: var(--font-mono); font-size: 0.68rem; letter-spacing: 0.09em; text-transform: uppercase; color: var(--ink-2); }
.dialog__body h2 {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: clamp(1.5rem, 3.4vw, 2.1rem);
  line-height: 1.16;
  letter-spacing: -0.02em;
  margin: 14px 0 10px;
}
.dialog__speaker { font-size: 0.95rem; color: var(--ink-2); margin: 0 0 6px; }
.dialog__speaker strong { color: var(--ink); font-weight: 600; }
.dialog__meta { font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.04em; color: var(--ink-2); margin: 0 0 20px; }
.dialog__actions { display: flex; flex-wrap: wrap; gap: 10px; margin: 0 0 24px; }
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  background: var(--ink);
  color: var(--bg);
  padding: 10px 18px;
  border-radius: 6px;
  text-decoration: none;
  font-size: 0.87rem;
  font-weight: 500;
  transition: transform 120ms ease, background 160ms ease;
}
.btn-primary:hover { background: color-mix(in srgb, var(--ink) 84%, var(--bg)); }
.btn-primary:active { transform: scale(0.98); }
.btn-primary .material-symbols-rounded { font-size: 17px; }
.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 10px 16px;
  border: 1px solid var(--hairline-strong);
  border-radius: 6px;
  text-decoration: none;
  color: var(--ink);
  font-size: 0.87rem;
  transition: border-color 160ms ease;
}
.btn-ghost:hover { border-color: var(--ink-2); }
.btn-ghost .material-symbols-rounded { font-size: 17px; color: var(--ink-2); }
.dialog__summary {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  line-height: 1.55;
  border-top: 1px solid var(--hairline);
  padding-top: 20px;
  margin: 0 0 22px;
}
.dialog__subhead {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gold-ink);
  margin: 0 0 10px;
}
.dialog__tldr { margin: 0 0 22px; padding-left: 20px; }
.dialog__tldr li { margin-bottom: 9px; color: var(--ink); font-size: 0.93rem; }
.dialog__tldr li::marker { color: var(--gold-ink); }
.dialog__tags { display: flex; flex-wrap: wrap; gap: 7px; border-top: 1px solid var(--hairline); padding-top: 16px; }
.tag { font-family: var(--font-mono); font-size: 0.66rem; letter-spacing: 0.05em; color: var(--ink-2); border: 1px solid var(--hairline); border-radius: 4px; padding: 3px 8px; }
@media (max-width: 560px) { .dialog__body { padding: 0 20px 28px; } }

/* ---------- footer ---------- */
.footer {
  border-top: 1px solid var(--hairline);
  padding: 34px 20px 44px;
  text-align: center;
  color: var(--ink-2);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.05em;
}
.footer p { margin: 0 0 12px; }
.footer__links { display: flex; justify-content: center; gap: 6px; }
.footer__link { color: var(--ink-2); }
.footer__link:hover { color: var(--ink); }

/* ---------- digest page ---------- */
.hero--digest { padding-bottom: 8px; }
.digest__intro {
  max-width: 66ch;
  color: var(--ink-2);
  font-size: 1.02rem;
  margin: 18px 0 6px;
}
.theme {
  padding: 26px 0 30px;
  border-bottom: 1px solid var(--hairline);
}
.theme:last-of-type { border-bottom: none; }
.theme__title {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: clamp(1.25rem, 2.6vw, 1.55rem);
  letter-spacing: -0.015em;
  margin: 0 0 10px;
}
.theme__body { max-width: 72ch; color: var(--ink-2); margin: 0 0 16px; }
.theme__refs { display: flex; flex-wrap: wrap; gap: 8px; }
.refchip {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.03em;
  color: var(--ink);
  text-decoration: none;
  border: 1px solid var(--hairline-strong);
  border-radius: 999px;
  padding: 6px 13px;
  transition: border-color 160ms ease, background 160ms ease;
}
.refchip:hover {
  border-color: var(--gold-ink);
  background: color-mix(in srgb, var(--surface-2) 60%, transparent);
}
.refchip__stage { width: 7px; height: 7px; border-radius: 50%; flex: none; }

/* ---------- talk-note page (full note content) ---------- */
[data-lang="en"] .lang-zh { display: none; }
[data-lang="zh"] .lang-en { display: none; }
[data-lang="zh"] .talkdoc__title,
[data-lang="zh"] .prose h2, [data-lang="zh"] .prose h3, [data-lang="zh"] .prose h4 {
  font-family: var(--font-serif);
}

.talkdoc { max-width: 780px; margin: 0 auto; padding-top: 52px; }
.talkdoc__head { border-bottom: 1px solid var(--hairline-strong); padding-bottom: 26px; }
.talkdoc__title {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: clamp(1.9rem, 4.6vw, 2.9rem);
  line-height: 1.14;
  letter-spacing: -0.022em;
  margin: 16px 0 12px;
}
.talkdoc__summary {
  font-family: var(--font-serif);
  font-size: 1.12rem;
  line-height: 1.55;
  margin: 24px 0 0;
}
.talkdoc__body { padding-top: 8px; }
.talkdoc__shared { border-top: 1px solid var(--hairline-strong); margin-top: 40px; padding-top: 8px; }
.talkdoc__source {
  margin-top: 40px;
  padding-top: 16px;
  border-top: 1px solid var(--hairline);
}
.talkdoc__source a {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.03em;
  color: var(--ink-2);
  text-decoration: underline;
  text-decoration-color: var(--hairline-strong);
  text-underline-offset: 4px;
}
.talkdoc__source a:hover { color: var(--ink); text-decoration-color: var(--gold); }

/* prose: converted markdown */
.prose { font-size: 0.97rem; line-height: 1.75; }
.prose h1 { display: none; }               /* the note's own H1 duplicates our header */
.prose h1 + p { display: none; }           /* …and its 一句話總結 line duplicates the summary */
.prose h2 {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 1.55rem;
  letter-spacing: -0.015em;
  line-height: 1.25;
  margin: 46px 0 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--hairline);
}
.prose h3 {
  font-weight: 650;
  font-size: 1.18rem;
  letter-spacing: -0.01em;
  line-height: 1.35;
  margin: 34px 0 10px;
}
.prose h4 { font-weight: 600; font-size: 1.02rem; margin: 26px 0 8px; }
.prose p { margin: 0 0 14px; }
.prose ul, .prose ol { margin: 0 0 16px; padding-left: 22px; }
.prose li { margin-bottom: 7px; }
.prose li::marker { color: var(--gold-ink); }
.prose blockquote {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 1.08rem;
  margin: 22px 0 12px;
  padding: 2px 0 2px 18px;
  border-left: 2px solid var(--gold);
  color: var(--ink);
}
.prose blockquote p { margin: 0 0 6px; }
.prose code {
  font-family: var(--font-mono);
  font-size: 0.84em;
  background: var(--surface-2);
  border-radius: 4px;
  padding: 1px 5px;
}
.prose pre {
  background: var(--surface-2);
  border: 1px solid var(--hairline);
  border-radius: 8px;
  padding: 14px 16px;
  overflow-x: auto;
}
.prose pre code { background: none; padding: 0; }
.prose hr { border: none; border-top: 1px solid var(--hairline); margin: 34px 0; }
.prose a { color: var(--accent-ink); text-decoration-color: var(--hairline-strong); text-underline-offset: 3px; }
.prose a:hover { text-decoration-color: var(--gold); }
.prose table {
  display: block;
  width: 100%;
  overflow-x: auto;
  border-collapse: collapse;
  margin: 8px 0 22px;
  font-size: 0.88rem;
}
.prose th, .prose td {
  text-align: left;
  padding: 8px 14px 8px 0;
  border-bottom: 1px solid var(--hairline);
  vertical-align: top;
  min-width: 90px;
}
.prose th {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-2);
  border-bottom: 1px solid var(--hairline-strong);
}
.prose strong { font-weight: 650; }

/* material symbols sizing guard (before font loads) */
.material-symbols-rounded {
  font-variation-settings: "opsz" 24, "wght" 400, "FILL" 0, "GRAD" 0;
  user-select: none;
}