/* ==========================================================================
   AIS — shared styles (sangthai.dev/field/)
   Same fonts + palette as the main site. Theme lives on <html data-theme>,
   saved in localStorage "theme" (shared with the home page).
   ========================================================================== */

/* == TOKENS: DARK == */
:root,
html[data-theme="dark"] {
  --bg: #0F0E17;
  --surface: #1C1B29;
  --card: #201F31;
  --raised: #29283E;
  --text: #F5F3FF;
  --text-2: #D6D3EA;
  --muted: #ADAACB;
  --border: rgba(255, 255, 255, 0.09);
  --border-strong: rgba(255, 255, 255, 0.2);
  --accent: #FF6B9D;
  --accent-ink: #0F0E17;
  --accent-2: #FF8C42;
  --accent-soft: rgba(255, 107, 157, 0.12);
  --accent-2-soft: rgba(255, 140, 66, 0.12);
  --header-bg: rgba(15, 14, 23, 0.78);
  --shadow: 0 1px 0 rgba(255, 255, 255, 0.03) inset;
  --shadow-lg: 0 20px 50px rgba(0, 0, 0, 0.35);
  --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'DM Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
  --radius: 16px;
  --radius-sm: 10px;
  --max: 1200px;
  --read: 720px;
  color-scheme: dark;
}

/* == TOKENS: LIGHT == */
html[data-theme="light"] {
  --bg: #F8F7FF;
  --surface: #ECEAF7;
  --card: #FFFFFF;
  --raised: #F3F1FB;
  --text: #0F0E17;
  --text-2: #2B2940;
  --muted: #4F4C66;
  --border: rgba(15, 14, 23, 0.1);
  --border-strong: rgba(15, 14, 23, 0.22);
  --accent: #C9365F;
  --accent-ink: #FFFFFF;
  --accent-2: #A8501A;
  --accent-soft: rgba(201, 54, 95, 0.08);
  --accent-2-soft: rgba(168, 80, 26, 0.08);
  --header-bg: rgba(248, 247, 255, 0.82);
  --shadow: 0 1px 3px rgba(15, 14, 23, 0.04), 0 4px 14px rgba(15, 14, 23, 0.04);
  --shadow-lg: 0 10px 40px rgba(15, 14, 23, 0.1);
  color-scheme: light;
}

/* == BASE == */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-padding-top: 88px; }
@media (prefers-reduced-motion: no-preference) { html { scroll-behavior: smooth; } }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
body, .card, .site-header, .node, .chip, .btn, .panel {
  transition: background-color 0.25s ease, color 0.25s ease, border-color 0.25s ease;
}
img, video { max-width: 100%; display: block; }
a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-2); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 6px; }
h1, h2, h3 { line-height: 1.15; letter-spacing: -0.02em; margin: 0; text-wrap: balance; }
p { margin: 0; }
.mono { font-family: var(--font-mono); }
.wrap { max-width: var(--max); margin: 0 auto; padding: 0 24px; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.skip {
  position: absolute; left: 16px; top: -60px; z-index: 200;
  background: var(--accent); color: var(--accent-ink); padding: 10px 16px; border-radius: 8px; font-weight: 600;
}
.skip:focus { top: 12px; }

/* == HEADER == */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: var(--header-bg);
  backdrop-filter: blur(18px) saturate(160%);
  -webkit-backdrop-filter: blur(18px) saturate(160%);
  border-bottom: 1px solid var(--border);
}
.site-header .wrap {
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  min-height: 68px;
}
.brand { display: flex; align-items: center; gap: 12px; color: var(--text); font-weight: 600; }
.brand:hover { color: var(--text); }
.brand__avatar {
  width: 38px; height: 38px; border-radius: 50%;
  display: grid; place-items: center;
  font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.04em;
  background: var(--card); border: 1px solid var(--accent); color: var(--text);
}
.brand__sub { display: block; font-family: var(--font-mono); font-size: 11px; font-weight: 400; color: var(--muted); letter-spacing: 0.06em; }
.nav { display: flex; align-items: center; gap: 2px; font-size: 14px; }
.nav a { color: var(--muted); padding: 10px 12px; border-radius: 999px; font-weight: 500; }
.nav a:hover { color: var(--text); }
.nav a[aria-current="page"] { color: var(--accent-ink); background: var(--accent); font-weight: 600; }
.header-actions { display: flex; align-items: center; gap: 8px; }
.icon-btn {
  width: 44px; height: 44px; border-radius: 50%;
  display: grid; place-items: center; cursor: pointer;
  background: var(--card); color: var(--text); border: 1px solid var(--border-strong);
}
.icon-btn:hover { border-color: var(--accent); }
.icon-btn svg { width: 18px; height: 18px; }
.theme-icon-sun { display: none; }
html[data-theme="dark"] .theme-icon-sun { display: block; }
html[data-theme="dark"] .theme-icon-moon { display: none; }
.back-home { display: none; font-size: 14px; font-weight: 600; padding: 10px 4px; }
@media (max-width: 860px) {
  .nav { display: none; }
  .back-home { display: inline-flex; }
  .brand__sub { display: none; }
}

/* == PROGRESS BAR (posts) == */
.progress { position: fixed; top: 0; left: 0; height: 3px; width: 100%; z-index: 150; pointer-events: none; }
.progress span { display: block; height: 100%; width: 100%; background: var(--accent); transform-origin: 0 50%; transform: scaleX(0); }

/* == BUTTONS + CHIPS == */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  min-height: 48px; padding: 12px 22px; border-radius: 12px;
  font: 600 15px/1 var(--font-sans); cursor: pointer; border: 1px solid transparent;
}
.btn--primary { background: var(--accent); color: var(--accent-ink); }
.btn--primary:hover { color: var(--accent-ink); filter: brightness(1.06); }
.btn--ghost { background: transparent; color: var(--text); border-color: var(--border-strong); }
.btn--ghost:hover { color: var(--text); border-color: var(--accent); }
.kicker {
  font-family: var(--font-mono); font-size: 13px; letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--accent-2);
}
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  min-height: 44px; padding: 10px 18px; border-radius: 999px; cursor: pointer;
  font: 500 14px/1 var(--font-sans);
  background: transparent; color: var(--text); border: 1px solid var(--border-strong);
}
.chip:hover { border-color: var(--accent); }
.chip[aria-pressed="true"] { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); font-weight: 600; }
.tag {
  display: inline-flex; align-items: center; gap: 6px;
  font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--accent);
}
.pill {
  display: inline-flex; align-items: center; gap: 6px; min-height: 36px;
  padding: 6px 14px; border-radius: 999px; font-family: var(--font-mono); font-size: 13px;
  border: 1px solid var(--border-strong); color: var(--muted);
}
a.pill:hover { color: var(--text); border-color: var(--accent); }

/* == SECTION HOME == */
.hero { padding: 80px 0 40px; }
.hero h1 { font-size: clamp(40px, 7vw, 72px); font-weight: 700; max-width: 14ch; margin-top: 14px; }
.hero h1 em { font-style: normal; color: var(--accent); }
.hero p { font-size: clamp(17px, 2vw, 20px); color: var(--text-2); max-width: 60ch; margin-top: 20px; }
.hero .actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.hero .promise { display: flex; flex-wrap: wrap; gap: 8px 22px; margin-top: 32px; color: var(--muted); font-family: var(--font-mono); font-size: 13px; }
.hero .promise span::before { content: "✓ "; color: var(--accent); }
.listing { padding: 24px 0 88px; }
.listing__head { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 16px; margin-bottom: 24px; }
.listing__head h2 { font-size: 24px; }
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 340px), 1fr)); gap: 24px; }

.card {
  position: relative; display: flex; flex-direction: column;
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  overflow: hidden; box-shadow: var(--shadow); color: var(--text);
}
.card:hover { border-color: var(--border-strong); }
@media (prefers-reduced-motion: no-preference) {
  .card { transition: transform 0.25s ease, border-color 0.25s ease, background-color 0.25s ease; }
  .card:hover { transform: translateY(-3px); }
}
.card__media { aspect-ratio: 16 / 10; background: #0F0E17; overflow: hidden; }
.card__media img { width: 100%; height: 100%; object-fit: cover; object-position: center 38%; }
.card__body { display: flex; flex-direction: column; gap: 12px; padding: 22px 22px 24px; flex-grow: 1; }
.card__title { font-size: 21px; line-height: 1.25; letter-spacing: -0.01em; }
.card__title a { color: var(--text); }
.card__title a::after { content: ""; position: absolute; inset: 0; }
.card__sum { color: var(--muted); font-size: 15px; line-height: 1.55; flex-grow: 1; }
.card__meta { display: flex; flex-wrap: wrap; gap: 6px 14px; padding-top: 14px; border-top: 1px solid var(--border); font-family: var(--font-mono); font-size: 12px; color: var(--muted); }
.card--featured { grid-column: 1 / -1; flex-direction: row; }
.card--featured .card__media { flex: 0 0 min(42%, 440px); aspect-ratio: 4 / 5; }
.card--featured .card__media img { object-position: center; }
.card--featured .card__body { padding: 36px; justify-content: center; gap: 16px; }
.card--featured .card__title { font-size: clamp(26px, 3.4vw, 38px); }
.card--featured .card__sum { flex-grow: 0; font-size: 17px; }
.badge-new { background: var(--accent); color: var(--accent-ink); border-radius: 999px; padding: 4px 10px; font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.08em; }
@media (max-width: 760px) {
  .card--featured { flex-direction: column; }
  .card--featured .card__media { flex-basis: auto; aspect-ratio: 16 / 11; }
  .card--featured .card__media img { object-position: center 38%; }
  .card--featured .card__body { padding: 24px 22px 26px; }
}
@media (min-width: 761px) {
  .card--wide { grid-column: 1 / -1; flex-direction: row; }
  .card--wide .card__media { flex: 0 0 min(34%, 360px); aspect-ratio: auto; min-height: 220px; }
  .card--wide .card__body { padding: 28px 30px; justify-content: center; }
  .card--wide .card__sum { flex-grow: 0; }
}
.card--next { border-style: dashed; background: transparent; box-shadow: none; }
.card--next:hover { transform: none; }
.card--next .card__body { justify-content: center; }
.empty { color: var(--muted); padding: 24px 0; }

/* == POST == */
.post-head { padding: 56px 0 28px; }
.crumbs { font-family: var(--font-mono); font-size: 13px; color: var(--muted); display: flex; flex-wrap: wrap; gap: 8px; }
.crumbs a { color: var(--muted); }
.crumbs a:hover { color: var(--accent); }
.post-head h1 { font-size: clamp(34px, 5.4vw, 58px); font-weight: 700; margin-top: 18px; max-width: 20ch; }
.post-head .dek { font-size: clamp(18px, 2.1vw, 21px); color: var(--text-2); max-width: 62ch; margin-top: 18px; line-height: 1.6; }
.post-head .meta { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 24px; }

.panel { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); }
.intro-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(240px, 320px); gap: 24px; align-items: stretch; }
@media (max-width: 860px) { .intro-grid { grid-template-columns: 1fr; } }
.tldr { padding: 26px 28px; display: flex; flex-direction: column; justify-content: center; }
.tldr ul { font-size: 18px; }
.tldr ul { margin: 14px 0 0; padding-left: 20px; display: grid; gap: 10px; color: var(--text-2); }
.tldr li::marker { color: var(--accent); }
.video { padding: 12px; }
.video video { width: 100%; height: auto; aspect-ratio: 4 / 5; border-radius: 10px; background: #0F0E17; object-fit: cover; }
.video figcaption { font-family: var(--font-mono); font-size: 12px; color: var(--muted); padding: 10px 4px 2px; }
@media (max-width: 860px) { .video { max-width: 420px; } }

/* == DIAGRAM == */
.diagram { margin: 40px 0 0; background: var(--surface); border: 1px solid var(--border); border-radius: 20px; overflow: hidden; }
.diagram:fullscreen { overflow: auto; border-radius: 0; display: flex; flex-direction: column; justify-content: center; }
.diagram__bar { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 12px; padding: 14px 18px; border-bottom: 1px solid var(--border); }
.diagram__title { font-family: var(--font-mono); font-size: 13px; color: var(--muted); }
.diagram__tools { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.seg { display: inline-flex; padding: 4px; border-radius: 12px; background: var(--bg); border: 1px solid var(--border); }
.seg button {
  min-height: 40px; padding: 8px 14px; border-radius: 9px; border: 0; cursor: pointer;
  font: 500 13px/1 var(--font-sans); color: var(--muted); background: transparent;
}
.seg button:hover { color: var(--text); }
.seg button[aria-pressed="true"] { background: var(--accent); color: var(--accent-ink); font-weight: 600; }
.tool-btn {
  min-height: 44px; padding: 8px 14px; border-radius: 10px; cursor: pointer;
  font: 500 13px/1 var(--font-sans); color: var(--text); background: transparent; border: 1px solid var(--border-strong);
  display: inline-flex; align-items: center; gap: 8px;
}
.tool-btn:hover { border-color: var(--accent); }
.tool-btn svg { width: 16px; height: 16px; }
.diagram__stage { padding: 36px 28px 28px; overflow-x: auto; }

/* snake grid: 5 columns (node, gap, node, gap, node) + optional loop column */
.flow {
  display: grid;
  grid-template-columns: minmax(130px, 1fr) 56px minmax(130px, 1fr) 56px minmax(130px, 1fr) 44px;
  grid-auto-rows: auto;
  align-items: center;
  max-width: 940px; margin: 0 auto;
  row-gap: 0;
}
.flow > * { grid-column: var(--c); grid-row: var(--r); }
.flow .pair { display: contents; }
.flow .pair > * { grid-column: var(--c); grid-row: var(--r); }
.node {
  position: relative;
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 10px;
  min-height: 112px; padding: 18px 12px; border-radius: 14px; cursor: pointer;
  background: var(--card); color: var(--text); border: 1px solid var(--border-strong);
  font: 600 16px/1.2 var(--font-sans); text-align: center;
  box-shadow: var(--shadow);
}
.node svg { width: 34px; height: 34px; stroke: currentColor; fill: none; stroke-width: 1.5; stroke-linecap: round; stroke-linejoin: round; color: var(--text-2); }
.node:hover { border-color: var(--accent); }
.node[aria-pressed="true"] { border: 2px solid var(--accent); background: var(--raised); box-shadow: 0 0 0 4px var(--accent-soft); }
.node[aria-pressed="true"] svg { color: var(--accent); }
.node--ai svg { color: var(--accent-2); }
.node--ghost { border-style: dashed; }
.node__badge {
  position: absolute; top: -13px; left: 50%; transform: translateX(-50%);
  white-space: nowrap; padding: 3px 10px; border-radius: 999px;
  font: 500 12px/1.4 var(--font-mono); color: var(--accent-2); background: var(--surface); border: 1px solid var(--accent-2);
}
.arrow { display: grid; place-items: center; color: var(--accent); min-height: 44px; }
.arrow svg { width: 30px; height: 18px; stroke: currentColor; fill: none; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.arrow--left svg { transform: rotate(180deg); }
.arrow--down svg { transform: rotate(90deg); }
.arrow--diag svg { transform: rotate(35deg); }
.loop {
  align-self: stretch; position: relative;
  margin: 56px 0 56px 6px;
  border: 2px solid var(--accent-2); border-left: 0; border-radius: 0 14px 14px 0;
}
.loop::before {
  content: ""; position: absolute; top: -7px; left: -4px;
  border: 6px solid transparent; border-right: 9px solid var(--accent-2); border-left: 0;
}
.loop__label {
  position: absolute; top: 50%; left: 100%; transform: translate(-50%, -50%) rotate(90deg);
  white-space: nowrap; background: var(--surface); padding: 2px 10px;
  font: 600 13px/1.4 var(--font-mono); color: var(--accent-2); border: 0; cursor: pointer; min-height: 32px;
}
.loop__label[aria-pressed="true"] { color: var(--accent); text-decoration: underline; text-underline-offset: 4px; }
.loop-note { display: none; }
.lane { max-width: 940px; margin: 36px auto 0; padding-top: 28px; border-top: 1px dashed var(--border-strong); }
.lane__label { font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted); margin-bottom: 14px; }
.lane__row { display: grid; grid-template-columns: minmax(130px, 1fr) 56px minmax(130px, 1fr) 56px minmax(130px, 1fr) 44px; align-items: center; }
.runs { display: flex; flex-direction: column; gap: 8px; align-items: stretch; }
.run { display: flex; justify-content: space-between; gap: 10px; padding: 10px 14px; border-radius: 10px; border: 1px dashed var(--border-strong); font: 500 13px/1.3 var(--font-mono); color: var(--muted); background: var(--card); }
.run b { color: var(--accent-2); font-weight: 500; }

/* modes: dim what isn't on the path (field.js adds .is-dim for any mode name; the named rules below are the original ones) */
[data-dim], .diagram [data-path] { transition: opacity 0.3s ease, filter 0.3s ease; }
.diagram [data-path].is-dim { opacity: 0.22; filter: saturate(0.2); }
.diagram[data-mode="bi"] [data-path]:not([data-path~="bi"]),
.diagram[data-mode="ai"] [data-path]:not([data-path~="ai"]),
.diagram[data-mode="pipe"] [data-path]:not([data-path~="pipe"]),
.diagram[data-mode="prompt"] [data-path]:not([data-path~="prompt"]) { opacity: 0.22; filter: saturate(0.2); }

.diagram__detail { display: flex; gap: 16px; align-items: flex-start; padding: 22px 26px 24px; background: var(--card); border-top: 1px solid var(--border); min-height: 118px; }
.diagram__detail .num { flex: 0 0 auto; font: 500 13px/1 var(--font-mono); color: var(--accent-ink); background: var(--accent); border-radius: 8px; padding: 8px 9px; margin-top: 2px; }
.diagram__detail h3 { font-size: 19px; letter-spacing: -0.01em; }
.diagram__detail p { color: var(--text-2); margin-top: 6px; font-size: 16px; line-height: 1.6; max-width: 70ch; }
.diagram__hint { padding: 0 26px 18px; background: var(--card); font-family: var(--font-mono); font-size: 12px; color: var(--muted); }

@media (max-width: 720px) {
  .diagram__stage { padding: 28px 18px 22px; }
  .flow, .lane__row { display: flex; flex-direction: column; align-items: stretch; max-width: 420px; }
  .flow > *, .lane__row > * { order: var(--o); }
  .flow .pair { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; order: var(--o); }
  .flow .pair > * { grid-column: auto; grid-row: auto; }
  .node:has(.node__badge) { margin-top: 8px; }
  .node { min-height: 0; flex-direction: row; justify-content: flex-start; padding: 16px 18px; gap: 14px; text-align: left; }
  .node svg { width: 26px; height: 26px; flex: 0 0 auto; }
  .flow .pair .node { flex-direction: column; justify-content: center; text-align: center; padding: 16px 10px; gap: 8px; }
  .node__badge { left: auto; right: 12px; transform: none; }
  .arrow { min-height: 34px; }
  .arrow svg { transform: rotate(90deg) !important; width: 24px; }
  .arrow--hide-sm { display: none; }
  .loop { display: none; }
  .loop-note {
    display: flex; gap: 10px; align-items: center; justify-content: center; order: 99;
    margin-top: 14px; padding: 12px 14px; border-radius: 12px; border: 2px solid var(--accent-2);
    color: var(--accent-2); font: 600 14px/1.4 var(--font-mono); background: var(--accent-2-soft); cursor: pointer;
  }
  .diagram__detail { padding: 20px 18px 22px; }
  .diagram__hint { padding: 0 18px 16px; }
}

/* == DIAGRAM EXTRAS (added 2026-10-23): hot node, sub-labels, trio of alternatives, wide node, still image == */
.seg { flex-wrap: wrap; }
.node__txt { display: flex; flex-direction: column; align-items: inherit; gap: 4px; }
.node__sub { display: block; font: 500 12px/1.35 var(--font-mono); color: var(--muted); }
.node--hot { border-color: var(--accent-2); box-shadow: 0 0 0 4px var(--accent-2-soft); }
.node--hot svg { color: var(--accent-2); }
.node--wide { min-height: 84px; flex-direction: row; gap: 14px; }
.arrow--diag-l svg { transform: rotate(145deg); }
.flow .trio { display: contents; }
.flow .trio > * { grid-column: var(--c); grid-row: var(--r); }
.arrow--sm-only { display: none; }
@media (min-width: 721px) { .node--badge-low .node__badge { top: auto; bottom: -13px; } }
.video img { width: 100%; height: auto; aspect-ratio: 4 / 5; border-radius: 10px; background: #0F0E17; object-fit: cover; }
.video a { display: block; border-radius: 10px; }
@media (max-width: 720px) {
  .flow .trio { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 10px; order: var(--o); }
  .flow .trio > * { grid-column: auto; grid-row: auto; }
  .flow .trio .node { flex-direction: column; justify-content: center; text-align: center; padding: 14px 6px; gap: 6px; font-size: 14px; }
  .flow .trio .node__txt { align-items: center; }
  .arrow--sm-only { display: grid; }
  .node__txt { align-items: flex-start; }
  .flow .pair .node__txt { align-items: center; }
  .node--wide { min-height: 0; }
}

/* == PROSE EXTRAS (added 2026-10-23): stats, table, code, checklist, quote == */
.prose code { font-family: var(--font-mono); font-size: 0.86em; background: var(--raised); border: 1px solid var(--border); border-radius: 6px; padding: 1px 6px; color: var(--text); }
.stats { display: grid; grid-template-columns: repeat(var(--n, 3), minmax(0, 1fr)); gap: 12px; }
@media (max-width: 640px) { .stats { grid-template-columns: repeat(var(--n-sm, 1), minmax(0, 1fr)); } }
.stat { background: var(--card); border: 1px solid var(--border); border-radius: 14px; padding: 16px 18px; }
.stat b { display: block; font-size: 30px; line-height: 1.1; letter-spacing: -0.02em; color: var(--text); }
.stat span { display: block; font-size: 14px; line-height: 1.45; color: var(--muted); margin-top: 6px; }
.stat--hot b { color: var(--accent); }
.tbl-wrap { overflow-x: auto; border: 1px solid var(--border); border-radius: 14px; background: var(--card); }
.tbl { width: 100%; border-collapse: collapse; font-size: 15px; line-height: 1.5; }
.tbl th, .tbl td { text-align: left; padding: 12px 16px; border-bottom: 1px solid var(--border); vertical-align: top; }
.tbl th { font: 500 12px/1.4 var(--font-mono); letter-spacing: 0.06em; text-transform: uppercase; color: var(--muted); background: var(--raised); }
.tbl tr:last-child td { border-bottom: 0; }
.tbl td strong { color: var(--text); }
.code { margin: 0; padding: 18px 20px; border-radius: 14px; background: var(--bg); border: 1px solid var(--border-strong); font: 400 14px/1.75 var(--font-mono); color: var(--text); overflow-x: auto; white-space: pre; }
.code .k { color: var(--accent); }
.code .d { color: var(--muted); }
.code-cap { font-family: var(--font-mono); font-size: 12px; color: var(--muted); margin-top: -12px; }
.prose ul.checks { list-style: none; padding-left: 0; }
.prose ul.checks li { position: relative; padding-left: 30px; }
.prose ul.checks li::before { content: "\2192"; position: absolute; left: 4px; top: 0; color: var(--accent); font-family: var(--font-mono); }
.prose blockquote { margin: 0; padding: 4px 0 4px 18px; border-left: 3px solid var(--accent-2); color: var(--text); font-size: 19px; line-height: 1.6; }
.prose blockquote cite { display: block; margin-top: 6px; font: 500 13px/1.4 var(--font-mono); font-style: normal; color: var(--muted); }
.compare .flowline { font-size: 12px; }

/* == ARTICLE + TOC == */
.post-body { display: grid; grid-template-columns: minmax(0, var(--read)) minmax(220px, 280px); justify-content: space-between; gap: 56px; padding: 56px 0 40px; }
@media (max-width: 1040px) { .post-body { grid-template-columns: minmax(0, 1fr); gap: 32px; } .toc { display: none; } }
.prose { display: flex; flex-direction: column; gap: 22px; color: var(--text-2); font-size: 18px; line-height: 1.75; min-width: 0; }
.prose h2 { color: var(--text); font-size: clamp(25px, 3vw, 30px); margin-top: 26px; }
.prose h2:first-child { margin-top: 0; }
.prose strong { color: var(--text); }
.prose ol, .prose ul { margin: 0; padding-left: 24px; display: grid; gap: 12px; }
.prose li::marker { color: var(--accent); font-family: var(--font-mono); }
.callout { border-left: 0; background: var(--accent-soft); border: 1px solid var(--border); border-radius: 14px; padding: 20px 22px; color: var(--text); }
.callout .kicker { display: block; margin-bottom: 6px; }
.compare { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
@media (max-width: 600px) { .compare { grid-template-columns: 1fr; } }
.compare > div { background: var(--card); border: 1px solid var(--border); border-radius: 14px; padding: 18px 20px; font-size: 16px; line-height: 1.6; }
.compare h3 { font-size: 17px; margin-bottom: 6px; color: var(--text); }
.flowline { font-family: var(--font-mono); font-size: 14px; color: var(--accent); display: block; margin: 4px 0 8px; line-height: 1.7; }
.sources { margin-top: 18px; padding-top: 30px; border-top: 1px solid var(--border); }
.sources ol { gap: 16px; }
.sources li { font-size: 16px; line-height: 1.55; }
.sources .src-meta { display: block; font-family: var(--font-mono); font-size: 12px; color: var(--muted); margin-top: 2px; }
.sources .note { font-size: 14px; color: var(--muted); }

.toc { position: sticky; top: 96px; align-self: start; display: flex; flex-direction: column; gap: 18px; }
.toc nav { padding: 20px; display: flex; flex-direction: column; }
.toc nav .kicker { color: var(--muted); font-size: 12px; margin-bottom: 8px; }
.toc nav a { color: var(--muted); padding: 7px 0 7px 12px; border-left: 2px solid var(--border); font-size: 14px; line-height: 1.4; }
.toc nav a:hover { color: var(--text); }
.toc nav a.is-active { color: var(--text); border-left-color: var(--accent); }
.cta { padding: 22px; display: flex; flex-direction: column; gap: 10px; border-color: var(--accent); }
@media (max-width: 1040px) { .toc { display: none; } }
.cta h3 { font-size: 17px; letter-spacing: 0; }
.cta p { font-size: 14px; color: var(--muted); line-height: 1.55; }

.post-end { padding: 8px 0 72px; display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 300px), 1fr)); gap: 18px; }
.post-end .panel { padding: 24px; display: flex; flex-direction: column; gap: 10px; color: var(--text); }
.post-end h3 { font-size: 19px; letter-spacing: -0.01em; }
.post-end p { color: var(--muted); font-size: 15px; }

/* == FOOTER == */
.site-footer { border-top: 1px solid var(--border); }
.site-footer .wrap { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px; padding-top: 28px; padding-bottom: calc(28px + env(safe-area-inset-bottom)); font-size: 14px; color: var(--muted); }
.site-footer .mono { font-size: 13px; }

@media (max-width: 520px) {
  body { font-size: 16px; }
  .wrap { padding: 0 16px; }
  .hero { padding: 52px 0 28px; }
  .post-head { padding: 40px 0 22px; }
  .prose { font-size: 17px; }
  .tldr { padding: 22px 20px; }
  .btn { width: 100%; }
}

@media print {
  .site-header, .progress, .toc, .diagram__tools, .post-end, .video { display: none !important; }
  body { background: #fff; color: #000; }
}