/* =========================================================
   AICPS — AI Creative Problem Solving
   Design system + page styles
   ========================================================= */

/* ---------- Tokens ---------- */
:root {
  --paper: #F7F4EE;
  --surface: #FFFFFF;
  --surface-2: #F0ECE4;
  --ink: #16152A;
  --ink-2: #47455E;
  --muted: #76738B;
  --line: #E4DED3;
  --line-strong: #CEC6B8;
  --spark: #D4F65A;
  --on-spark: #16152A;
  --code-bg: #16152A;
  --code-ink: #ECEAF5;

  --clarify: #2F6BEA;
  --ideate: #E07F0A;
  --select: #0D9884;
  --implement: #D93C74;
  --unblock: #8455EC;

  --radius-lg: 28px;
  --radius: 18px;
  --radius-sm: 10px;
  --shadow-sm: 0 1px 2px rgba(22, 21, 42, .06);
  --shadow: 0 1px 2px rgba(22, 21, 42, .05), 0 10px 30px -8px rgba(22, 21, 42, .12);
  --shadow-lg: 0 2px 4px rgba(22, 21, 42, .04), 0 24px 60px -16px rgba(22, 21, 42, .22);

  --font-display: "Fraunces", Georgia, "Times New Roman", serif;
  --font-body: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;

  --header-h: 68px;
  --container: 1200px;
  --gutter: 24px;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #0E0D19;
    --surface: #17162A;
    --surface-2: #1F1E35;
    --ink: #F2EFE7;
    --ink-2: #C4C1D4;
    --muted: #918EA8;
    --line: #2B2945;
    --line-strong: #3C3A5C;
    --code-bg: #0A0914;
    --code-ink: #ECEAF5;
    --clarify: #719BFF;
    --ideate: #FFA941;
    --select: #31D0B6;
    --implement: #FF6E9E;
    --unblock: #AC8DFF;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, .4);
    --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 10px 30px -8px rgba(0, 0, 0, .55);
    --shadow-lg: 0 2px 4px rgba(0, 0, 0, .3), 0 24px 60px -16px rgba(0, 0, 0, .7);
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --paper: #0E0D19;
  --surface: #17162A;
  --surface-2: #1F1E35;
  --ink: #F2EFE7;
  --ink-2: #C4C1D4;
  --muted: #918EA8;
  --line: #2B2945;
  --line-strong: #3C3A5C;
  --code-bg: #0A0914;
  --code-ink: #ECEAF5;
  --clarify: #719BFF;
  --ideate: #FFA941;
  --select: #31D0B6;
  --implement: #FF6E9E;
  --unblock: #AC8DFF;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, .4);
  --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 10px 30px -8px rgba(0, 0, 0, .55);
  --shadow-lg: 0 2px 4px rgba(0, 0, 0, .3), 0 24px 60px -16px rgba(0, 0, 0, .7);
  color-scheme: dark;
}

/* Family color hooks */
.fam-clarify   { --fam: var(--clarify); }
.fam-ideate    { --fam: var(--ideate); }
.fam-select    { --fam: var(--select); }
.fam-implement { --fam: var(--implement); }
.fam-unblock   { --fam: var(--unblock); }

/* ---------- Base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-padding-top: calc(var(--header-h) + 64px); }
@media (prefers-reduced-motion: no-preference) { html { scroll-behavior: smooth; } }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 400 16.5px/1.65 var(--font-body);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; }
button { font: inherit; color: inherit; }
h1, h2, h3, h4 { font-family: var(--font-display); font-weight: 600; line-height: 1.08; letter-spacing: -0.015em; margin: 0; font-optical-sizing: auto; }
p { margin: 0 0 1em; }
:focus-visible { outline: 3px solid var(--fam, var(--clarify)); outline-offset: 3px; border-radius: 6px; }
::selection { background: var(--spark); color: var(--on-spark); }

.container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 var(--gutter); }
@media (max-width: 640px) { :root { --gutter: 16px; } body { font-size: 16px; } }

.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }
.skip-link { position: absolute; left: 16px; top: -60px; z-index: 100; background: var(--ink); color: var(--paper); padding: 10px 16px; border-radius: 10px; text-decoration: none; }
.skip-link:focus { top: 12px; }

.eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  font: 600 12.5px/1 var(--font-body); letter-spacing: .14em; text-transform: uppercase;
  color: var(--muted);
}
.eyebrow::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: var(--fam, var(--spark)); box-shadow: 0 0 0 3px color-mix(in srgb, var(--fam, var(--spark)) 25%, transparent); }

.hl { background: linear-gradient(transparent 62%, var(--spark) 62%, var(--spark) 92%, transparent 92%); padding: 0 .06em; }
:root[data-theme="dark"] .hl { background: none; color: var(--spark); }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .hl { background: none; color: var(--spark); } }
.ital { font-style: italic; font-weight: 500; }

/* ---------- Buttons & chips ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  min-height: 48px; padding: 0 22px; border-radius: 999px;
  font: 600 15.5px/1 var(--font-body); text-decoration: none; cursor: pointer;
  border: 1.5px solid transparent; transition: transform .15s ease, background .2s ease, color .2s ease, border-color .2s ease, box-shadow .2s ease;
  white-space: nowrap;
}
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--ink); color: var(--paper); }
.btn-primary:hover { background: var(--spark); color: var(--on-spark); box-shadow: 0 8px 24px -8px color-mix(in srgb, var(--spark) 80%, transparent); }
.btn-ghost { border-color: var(--line-strong); background: transparent; color: var(--ink); }
.btn-ghost:hover { border-color: var(--ink); background: var(--surface); }
.btn-spark { background: var(--spark); color: var(--on-spark); }
.btn-spark:hover { background: var(--surface); color: var(--ink); }
.btn-sm { min-height: 38px; padding: 0 16px; font-size: 14px; }
.btn .arrow { transition: transform .2s ease; }
.btn:hover .arrow { transform: translateX(3px); }

.chip {
  display: inline-flex; align-items: center; gap: 8px; min-height: 38px; padding: 0 14px;
  border-radius: 999px; border: 1.5px solid var(--line-strong); background: var(--surface);
  font: 500 14px/1.2 var(--font-body); color: var(--ink-2); cursor: pointer;
  transition: border-color .15s, background .15s, color .15s;
}
.chip:hover { border-color: var(--ink-2); color: var(--ink); }
.chip[aria-pressed="true"] { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.chip .swatch { width: 10px; height: 10px; border-radius: 3px; background: var(--fam); }
.chip[aria-pressed="true"] .swatch { box-shadow: 0 0 0 2px var(--paper); }

.badge {
  display: inline-flex; align-items: center; gap: 6px; padding: 5px 11px; border-radius: 999px;
  font: 600 12.5px/1 var(--font-body); letter-spacing: .02em;
  background: color-mix(in srgb, var(--fam, var(--ink)) 13%, var(--surface));
  color: color-mix(in srgb, var(--fam, var(--ink)) 70%, var(--ink));
  border: 1px solid color-mix(in srgb, var(--fam, var(--ink)) 28%, transparent);
}
.badge-ai { --fam: var(--ink); background: var(--spark); color: var(--on-spark); border-color: transparent; }

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50; height: var(--header-h);
  background: color-mix(in srgb, var(--paper) 82%, transparent);
  backdrop-filter: saturate(1.4) blur(14px); -webkit-backdrop-filter: saturate(1.4) blur(14px);
  border-bottom: 1px solid transparent; transition: border-color .2s;
}
.site-header.scrolled { border-bottom-color: var(--line); }
.site-header .container { height: 100%; display: flex; align-items: center; gap: 28px; }
.brand { display: inline-flex; align-items: center; gap: 12px; text-decoration: none; margin-right: auto; }
.brand-mark { width: 36px; height: 36px; flex: none; }
.brand-text { display: flex; flex-direction: column; line-height: 1.05; }
.brand-name { font: 700 18px/1 var(--font-display); letter-spacing: -.01em; }
.brand-sub { font: 500 11.5px/1.3 var(--font-body); color: var(--muted); letter-spacing: .02em; }
.nav { display: flex; align-items: center; gap: 4px; }
.nav a { padding: 8px 12px; border-radius: 999px; text-decoration: none; font: 500 15px/1 var(--font-body); color: var(--ink-2); }
.nav a:hover, .nav a[aria-current="page"] { color: var(--ink); background: var(--surface-2); }
.header-actions { display: flex; align-items: center; gap: 8px; }
.icon-btn {
  width: 42px; height: 42px; border-radius: 50%; border: 1.5px solid var(--line); background: var(--surface);
  display: inline-grid; place-items: center; cursor: pointer; color: var(--ink-2);
}
.icon-btn:hover { color: var(--ink); border-color: var(--line-strong); }
.icon-btn svg { width: 19px; height: 19px; }
.theme-toggle .moon { display: none; }
:root[data-theme="dark"] .theme-toggle .sun { display: none; }
:root[data-theme="dark"] .theme-toggle .moon { display: block; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .theme-toggle .sun { display: none; }
  :root:not([data-theme="light"]) .theme-toggle .moon { display: block; }
}
.menu-btn { display: none; }
@media (max-width: 900px) {
  .nav { display: none; position: absolute; top: var(--header-h); left: 0; right: 0; flex-direction: column; align-items: stretch; padding: 12px var(--gutter) 20px; background: var(--paper); border-bottom: 1px solid var(--line); box-shadow: var(--shadow); }
  .nav.open { display: flex; }
  .nav a { padding: 14px 12px; font-size: 17px; }
  .menu-btn { display: inline-grid; }
  .header-cta { display: none; }
}

/* ---------- Sections ---------- */
.section { padding: 104px 0; position: relative; }
.section-tight { padding: 72px 0; }
@media (max-width: 760px) { .section { padding: 72px 0; } .section-tight { padding: 56px 0; } }
.section-head { max-width: 760px; margin-bottom: 48px; }
.section-head h2 { font-size: clamp(2.1rem, 4vw, 3.3rem); margin: 16px 0 18px; }
.section-head .lead { font-size: 1.15rem; color: var(--ink-2); max-width: 640px; }
.section-alt { background: var(--surface); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }

/* =========================================================
   HOME
   ========================================================= */

/* ---------- Hero ---------- */
.hero { padding: 64px 0 40px; position: relative; overflow: hidden; }
.hero::before {
  content: ""; position: absolute; inset: -20% -10% auto auto; width: 720px; height: 720px; border-radius: 50%;
  background: radial-gradient(closest-side, color-mix(in srgb, var(--spark) 38%, transparent), transparent 70%);
  pointer-events: none; opacity: .55;
}
.hero-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.12fr); gap: 48px; align-items: center; position: relative; }
.hero h1 { font-size: clamp(2.8rem, 6vw, 5.2rem); line-height: .98; letter-spacing: -.03em; margin: 20px 0 24px; font-weight: 600; }
.hero .lead { font-size: clamp(1.08rem, 1.5vw, 1.25rem); color: var(--ink-2); max-width: 540px; margin-bottom: 32px; }
.hero-ctas { display: flex; flex-wrap: wrap; gap: 12px; }
.hero-stats { display: flex; gap: 36px; margin-top: 44px; padding-top: 28px; border-top: 1px solid var(--line); flex-wrap: wrap; }
.hero-stats div { display: flex; flex-direction: column; }
.hero-stats strong { font: 600 2.1rem/1 var(--font-display); letter-spacing: -.02em; }
.hero-stats span { font-size: 13.5px; color: var(--muted); margin-top: 6px; }
.hero-visual { position: relative; }
.diamond-svg { width: 100%; height: auto; overflow: visible; }
.diamond-svg .shape { stroke-width: 1.5; }
.diamond-svg .dot { transform-box: fill-box; transform-origin: center; animation: twinkle 4.5s ease-in-out infinite; }
@keyframes twinkle { 0%, 100% { opacity: .95; transform: scale(1); } 50% { opacity: .35; transform: scale(.7); } }
.diamond-svg .phase-label { font: 600 13px var(--font-body); letter-spacing: .12em; text-transform: uppercase; }
.diamond-svg .phase-q { font: italic 500 14px var(--font-display); fill: var(--muted); }
.diamond-svg .node-label { font: 600 12px var(--font-body); }
.diamond-svg .callout rect { fill: var(--surface); stroke: var(--line-strong); }
.diamond-svg .callout text { font: 600 12.5px var(--font-body); fill: var(--ink); }
.diamond-svg .callout.ai rect { fill: var(--spark); stroke: none; }
.diamond-svg .callout.ai text { fill: var(--on-spark); }
.diamond-svg .flow { stroke-dasharray: 4 6; animation: flow 1.6s linear infinite; }
@keyframes flow { to { stroke-dashoffset: -20; } }
@media (max-width: 960px) {
  .hero-grid { grid-template-columns: 1fr; gap: 24px; }
  .hero { padding-top: 40px; }
}

/* ---------- Marquee ---------- */
.marquee { border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); background: var(--surface); overflow: hidden; padding: 16px 0; }
.marquee-track { display: flex; gap: 0; width: max-content; animation: marquee 90s linear infinite; }
.marquee:hover .marquee-track { animation-play-state: paused; }
.marquee-track span { font: 500 italic 1.35rem/1 var(--font-display); color: var(--ink-2); padding: 0 22px; white-space: nowrap; display: inline-flex; align-items: center; gap: 44px; }
.marquee-track span::after { content: "✦"; font-style: normal; font-size: .8rem; color: var(--fam); }
@keyframes marquee { to { transform: translateX(-50%); } }

/* ---------- Intro / loop ---------- */
.intro-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; }
.intro-grid .section-head { margin-bottom: 0; }
.pillars { display: grid; gap: 14px; margin-top: 32px; }
.pillar { display: grid; grid-template-columns: 44px 1fr; gap: 16px; align-items: start; padding: 18px 20px; border-radius: var(--radius); background: var(--surface); border: 1px solid var(--line); }
.pillar-icon { width: 44px; height: 44px; border-radius: 12px; display: grid; place-items: center; background: var(--surface-2); }
.pillar-icon svg { width: 22px; height: 22px; }
.pillar h3 { font: 600 1.05rem/1.3 var(--font-body); letter-spacing: 0; margin-bottom: 4px; }
.pillar p { margin: 0; color: var(--ink-2); font-size: 15px; }
.loop-card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 28px; box-shadow: var(--shadow); }
.loop-svg { width: 100%; height: auto; }
.loop-svg .node-you circle { fill: var(--ink); }
.loop-svg .node-you text { fill: var(--paper); }
.loop-svg .node-ai circle { fill: var(--spark); }
.loop-svg .node-ai text { fill: var(--on-spark); }
.loop-svg .n-title { font: 700 17px var(--font-display); text-anchor: middle; }
.loop-svg .n-who { font: 600 10.5px var(--font-body); letter-spacing: .14em; text-anchor: middle; text-transform: uppercase; opacity: .75; }
.loop-svg .n-desc { font: 400 13px var(--font-body); fill: var(--ink-2); text-anchor: middle; }
.loop-svg .ring { fill: none; stroke: var(--line-strong); stroke-width: 1.5; stroke-dasharray: 3 7; }
.loop-svg .arc { fill: none; stroke: var(--ink-2); stroke-width: 2; }
.loop-svg .center-t { font: 600 italic 22px var(--font-display); fill: var(--ink); text-anchor: middle; }
.loop-svg .center-s { font: 500 12px var(--font-body); fill: var(--muted); text-anchor: middle; letter-spacing: .08em; text-transform: uppercase; }
.loop-legend { display: flex; gap: 20px; justify-content: center; margin-top: 8px; font-size: 13.5px; color: var(--ink-2); }
.loop-legend span { display: inline-flex; align-items: center; gap: 8px; }
.loop-legend i { width: 12px; height: 12px; border-radius: 50%; display: inline-block; }
@media (max-width: 960px) { .intro-grid { grid-template-columns: 1fr; gap: 40px; } }

/* ---------- Stages ---------- */
.stages { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.stage {
  position: relative; display: flex; flex-direction: column; gap: 10px; padding: 26px 22px 22px;
  border-radius: var(--radius); background: var(--surface); border: 1px solid var(--line);
  text-decoration: none; overflow: hidden; transition: transform .2s ease, box-shadow .2s ease, border-color .2s;
}
.stage::before { content: ""; position: absolute; inset: 0 0 auto 0; height: 5px; background: var(--fam); }
.stage:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: color-mix(in srgb, var(--fam) 50%, var(--line)); }
.stage-num { font: 600 13px/1 var(--font-mono); color: var(--fam); }
.stage h3 { font-size: 1.75rem; }
.stage .q { font: italic 500 1.05rem/1.35 var(--font-display); color: var(--ink-2); margin: 0; }
.stage .d { font-size: 14.5px; color: var(--ink-2); margin: 4px 0 0; flex: 1; }
.stage-shape { height: 46px; margin: 6px 0 4px; }
.stage-shape svg { height: 46px; width: auto; }
.stage-foot { display: flex; align-items: baseline; justify-content: space-between; gap: 4px 12px; flex-wrap: wrap; padding-top: 14px; margin-top: 8px; border-top: 1px dashed var(--line-strong); font-size: 13.5px; color: var(--muted); }
.stage-foot b { color: var(--ink); font-weight: 600; }
.stage-unblock { background: color-mix(in srgb, var(--unblock) 7%, var(--surface)); border-style: dashed; border-color: color-mix(in srgb, var(--unblock) 40%, var(--line)); }
.stage-unblock::before { background: repeating-linear-gradient(90deg, var(--unblock) 0 10px, transparent 10px 16px); }
.stage-unblock { grid-column: 1 / -1; display: grid; grid-template-columns: auto auto minmax(0, 1fr) auto; grid-template-areas: "shape title desc foot" "shape q desc foot"; align-items: center; gap: 2px 28px; padding: 22px 26px; }
.stage-unblock .stage-num { position: absolute; top: 14px; right: 18px; }
.stage-unblock .stage-shape { grid-area: shape; margin: 0; }
.stage-unblock h3 { grid-area: title; align-self: end; }
.stage-unblock .q { grid-area: q; align-self: start; }
.stage-unblock .d { grid-area: desc; margin: 0; max-width: 460px; }
.stage-unblock .stage-foot { grid-area: foot; border-top: 0; margin: 0; padding: 0 0 0 24px; border-left: 1px dashed var(--line-strong); flex-direction: column; align-items: flex-start; }
@media (max-width: 1100px) { .stages { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 860px) {
  .stage-unblock { display: flex; padding: 26px 22px 22px; gap: 10px; }
  .stage-unblock .stage-num { position: static; }
  .stage-unblock .stage-foot { border-left: 0; border-top: 1px dashed var(--line-strong); padding: 14px 0 0; margin-top: 8px; flex-direction: row; }
}
@media (max-width: 560px) { .stages { grid-template-columns: 1fr; } }

/* ---------- Toolbox (periodic table) ---------- */
.toolbox-head { display: flex; align-items: end; justify-content: space-between; gap: 32px; flex-wrap: wrap; }
.finder {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-lg);
  padding: 26px 28px; box-shadow: var(--shadow); margin-bottom: 28px;
}
.finder-title { display: flex; align-items: baseline; gap: 14px; flex-wrap: wrap; margin-bottom: 16px; }
.finder-title h3 { font-size: 1.45rem; }
.finder-title span { color: var(--muted); font-size: 14.5px; }
.situations { display: flex; flex-wrap: wrap; gap: 8px; }
.situations .chip { background: var(--paper); }
.situations .chip[aria-pressed="true"] { background: var(--spark); color: var(--on-spark); border-color: var(--spark); }
.finder-path { display: none; margin-top: 18px; padding: 14px 18px; border-radius: 14px; background: var(--paper); border: 1px dashed var(--line-strong); font-size: 15px; align-items: center; gap: 10px; flex-wrap: wrap; }
.finder-path.show { display: flex; }
.finder-path .lbl { font-weight: 600; margin-right: 4px; }
.finder-path a, .finder-path button.path-step { display: inline-flex; align-items: center; gap: 8px; padding: 6px 12px 6px 6px; border-radius: 999px; background: var(--surface); border: 1px solid var(--line); text-decoration: none; font-weight: 500; cursor: pointer; font-size: 14.5px; }
.finder-path .mini-sym { width: 26px; height: 26px; border-radius: 7px; display: grid; place-items: center; font: 700 12.5px/1 var(--font-display); background: color-mix(in srgb, var(--fam) 16%, var(--surface)); color: color-mix(in srgb, var(--fam) 75%, var(--ink)); }
.finder-path .sep { color: var(--muted); }

.filters { display: flex; align-items: center; gap: 10px 18px; flex-wrap: wrap; margin-bottom: 22px; }
.filter-group { display: flex; gap: 6px; flex-wrap: wrap; align-items: center; }
.filter-group .glabel { font: 600 12px/1 var(--font-body); letter-spacing: .1em; text-transform: uppercase; color: var(--muted); margin-right: 4px; }
.search { position: relative; flex: 1 1 220px; max-width: 320px; margin-left: auto; }
.search input {
  width: 100%; height: 42px; border-radius: 999px; border: 1.5px solid var(--line-strong); background: var(--surface);
  padding: 0 16px 0 40px; font: 500 15px var(--font-body); color: var(--ink);
}
.search input:focus { outline: none; border-color: var(--ink); }
.search svg { position: absolute; left: 14px; top: 50%; transform: translateY(-50%); width: 17px; height: 17px; color: var(--muted); }
.result-count { font-size: 14px; color: var(--muted); }

.toolbox { display: grid; grid-template-columns: minmax(0, 1fr) 320px; gap: 28px; align-items: start; }
.table { display: flex; flex-direction: column; gap: 14px; }
.band { display: grid; gap: 12px; padding: 14px 16px 16px; border-radius: var(--radius); background: color-mix(in srgb, var(--fam) 4%, var(--surface)); border: 1px solid var(--line); border-top: 3px solid var(--fam); }
.band-head { display: flex; align-items: baseline; gap: 4px 12px; flex-wrap: wrap; padding: 0 2px; }
.band-head .bnum { font: 600 12px var(--font-mono); color: var(--fam); }
.band-head h3 { font-size: 1.35rem; }
.band-head p { font: italic 500 1rem/1.35 var(--font-display); color: var(--ink-2); margin: 0; }
.band-head .bmeta { font-size: 12.5px; color: var(--muted); margin-left: auto; }
.tiles { display: grid; grid-template-columns: repeat(auto-fill, minmax(86px, 1fr)); gap: 8px; }

.tile {
  --tint: color-mix(in srgb, var(--fam) 11%, var(--surface));
  position: relative; display: flex; flex-direction: column; aspect-ratio: 1 / 1.04; padding: 8px 9px 9px;
  border-radius: 12px; background: var(--tint); border: 1.5px solid color-mix(in srgb, var(--fam) 26%, transparent);
  text-decoration: none; color: var(--ink); cursor: pointer; text-align: left;
  transition: transform .16s ease, box-shadow .16s ease, border-color .16s ease, opacity .25s ease, filter .25s ease;
}
.tile:hover, .tile:focus-visible, .tile.is-active { transform: translateY(-3px); border-color: var(--fam); box-shadow: 0 10px 22px -10px color-mix(in srgb, var(--fam) 60%, transparent); outline: none; }
.tile .t-num { font: 500 10.5px/1 var(--font-mono); color: var(--muted); }
.tile .t-mode { position: absolute; top: 7px; right: 8px; color: color-mix(in srgb, var(--fam) 70%, var(--ink)); opacity: .8; }
.tile .t-mode svg { width: 13px; height: 13px; }
.tile .t-sym { font: 600 2rem/1 var(--font-display); letter-spacing: -.02em; color: color-mix(in srgb, var(--fam) 78%, var(--ink)); margin: auto 0 4px; }
.tile .t-name { font: 500 11.5px/1.2 var(--font-body); color: var(--ink-2); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; min-height: 2.4em; }
.tile.dim { opacity: .17; filter: grayscale(.7); }
.tile.dim:hover { opacity: .6; }
.tile.match { border-color: var(--fam); }
.tile.big { width: 132px; aspect-ratio: 1 / 1.04; padding: 12px 14px; border-radius: 18px; border-width: 2px; cursor: default; }
.tile.big:hover { transform: none; box-shadow: none; }
.tile.big .t-num { font-size: 12.5px; }
.tile.big .t-sym { font-size: 3.4rem; }
.tile.big .t-name { font-size: 13px; min-height: 0; }
.tile.big .t-mode svg { width: 16px; height: 16px; }

.inspector { position: sticky; top: calc(var(--header-h) + 20px); }
.inspector-card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 24px; box-shadow: var(--shadow); }
.inspector-top { display: flex; gap: 16px; align-items: flex-start; }
.inspector-top .tile.big { width: 96px; padding: 9px 10px; border-radius: 14px; }
.inspector-top .tile.big .t-sym { font-size: 2.5rem; }
.inspector-top .tile.big .t-name { display: none; }
.inspector h3 { font-size: 1.5rem; margin: 4px 0 8px; }
.inspector .line { color: var(--ink-2); font-size: 15px; margin: 16px 0 18px; }
.meters { display: grid; gap: 12px; padding: 16px 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.meter { display: grid; grid-template-columns: 62px 1fr; gap: 12px; align-items: center; font-size: 12.5px; }
.meter .m-label { font-weight: 600; color: var(--muted); text-transform: uppercase; letter-spacing: .08em; font-size: 11px; }
.meter .m-track { position: relative; height: 6px; border-radius: 3px; background: var(--surface-2); }
.meter .m-dot { position: absolute; top: 50%; width: 14px; height: 14px; border-radius: 50%; background: var(--fam); border: 2px solid var(--surface); box-shadow: 0 0 0 1px var(--fam); transform: translate(-50%, -50%); transition: left .3s ease; }
.meter .m-ends { grid-column: 2; display: flex; justify-content: space-between; color: var(--muted); font-size: 11.5px; margin-top: -6px; }
.ai-role { display: flex; gap: 12px; align-items: center; margin: 18px 0 20px; padding: 12px 14px; border-radius: 14px; background: color-mix(in srgb, var(--spark) 22%, var(--surface)); }
.ai-role .spark-ic { width: 34px; height: 34px; border-radius: 10px; display: grid; place-items: center; background: var(--spark); color: var(--on-spark); flex: none; }
.ai-role .spark-ic svg { width: 18px; height: 18px; }
.ai-role b { display: block; font-size: 14.5px; }
.ai-role span { font-size: 13px; color: var(--ink-2); }
.inspector .btn { width: 100%; white-space: normal; text-align: center; line-height: 1.25; padding: 12px 18px; }
.inspector .soon { display: block; text-align: center; font-size: 13.5px; color: var(--muted); padding: 12px; border: 1.5px dashed var(--line-strong); border-radius: 999px; }
.inspector-close { display: none; }
.legend { display: flex; flex-wrap: wrap; gap: 8px 18px; margin-top: 18px; font-size: 13px; color: var(--muted); align-items: center; }
.legend span { display: inline-flex; align-items: center; gap: 6px; }
.legend svg { width: 14px; height: 14px; }

@media (max-width: 1080px) {
  .toolbox { grid-template-columns: 1fr; }
  .inspector { position: fixed; left: 12px; right: 12px; bottom: 12px; top: auto; z-index: 60; transform: translateY(calc(100% + 24px)); transition: transform .3s cubic-bezier(.2,.8,.2,1); }
  .inspector.open { transform: none; }
  .inspector-card { box-shadow: var(--shadow-lg); max-height: 78vh; overflow: auto; padding: 20px; }
  .inspector-close { display: inline-grid; position: absolute; top: 12px; right: 12px; }
}
@media (max-width: 700px) {
  .band { padding: 12px; }
  .tiles { grid-template-columns: repeat(auto-fill, minmax(78px, 1fr)); gap: 6px; }
  .tile .t-sym { font-size: 1.6rem; }
  .tile .t-name { font-size: 10.5px; }
  .search { max-width: none; margin-left: 0; flex-basis: 100%; }
  .finder { padding: 20px; }
}

/* ---------- Anatomy ---------- */
.anatomy { display: grid; grid-template-columns: repeat(5, 1fr); gap: 0; position: relative; }
.anatomy::before { content: ""; position: absolute; left: 10%; right: 10%; top: 31px; border-top: 2px dashed var(--line-strong); }
.an-step { position: relative; padding: 0 14px; text-align: center; }
.an-ic { width: 64px; height: 64px; margin: 0 auto 18px; border-radius: 20px; display: grid; place-items: center; background: var(--surface); border: 1.5px solid var(--line-strong); position: relative; z-index: 1; }
.an-ic svg { width: 28px; height: 28px; }
.an-step:nth-child(4) .an-ic, .an-step:nth-child(5) .an-ic { background: var(--spark); border-color: var(--spark); color: var(--on-spark); }
.an-step .an-k { font: 600 12px var(--font-mono); color: var(--muted); }
.an-step h3 { font-size: 1.35rem; margin: 6px 0 8px; }
.an-step p { font-size: 14.5px; color: var(--ink-2); margin: 0; }
.anatomy-cta { display: flex; justify-content: center; margin-top: 44px; }
@media (max-width: 900px) {
  .anatomy { grid-template-columns: 1fr; gap: 22px; }
  .anatomy::before { left: 31px; right: auto; top: 10px; bottom: 10px; border-top: 0; border-left: 2px dashed var(--line-strong); }
  .an-step { display: grid; grid-template-columns: 64px 1fr; gap: 0 18px; text-align: left; padding: 0; }
  .an-ic { grid-row: span 3; margin: 0; }
}

/* ---------- Rules ---------- */
.rules { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.rule { padding: 24px; border-radius: var(--radius); border: 1px solid var(--line); background: var(--paper); }
.rule .r-n { font: 600 2.6rem/1 var(--font-display); color: var(--line-strong); }
.rule h3 { font-size: 1.25rem; margin: 14px 0 8px; }
.rule p { margin: 0; color: var(--ink-2); font-size: 15px; }
.rule.feature { grid-row: span 2; background: var(--ink); color: var(--paper); border-color: var(--ink); display: flex; flex-direction: column; }
.rule.feature .r-n { color: var(--spark); }
.rule.feature p { color: color-mix(in srgb, var(--paper) 78%, transparent); }
.rule.feature h3 { font-size: 1.7rem; }
.rule.feature blockquote { margin: auto 0 0; padding-top: 24px; font: italic 500 1.15rem/1.4 var(--font-display); color: var(--spark); }
@media (max-width: 900px) { .rules { grid-template-columns: 1fr 1fr; } .rule.feature { grid-column: 1 / -1; grid-row: auto; } }
@media (max-width: 560px) { .rules { grid-template-columns: 1fr; } }

/* ---------- CTA band ---------- */
.cta-band { background: var(--ink); color: var(--paper); border-radius: var(--radius-lg); padding: 64px; display: grid; grid-template-columns: 1.3fr 1fr; gap: 40px; align-items: center; position: relative; overflow: hidden; }
.cta-band::after { content: ""; position: absolute; right: -120px; top: -120px; width: 380px; height: 380px; border-radius: 50%; border: 60px solid color-mix(in srgb, var(--spark) 22%, transparent); }
.cta-band h2 { font-size: clamp(2rem, 4vw, 3.2rem); }
.cta-band h2 em { color: var(--spark); font-weight: 500; }
.cta-band p { color: color-mix(in srgb, var(--paper) 75%, transparent); margin: 16px 0 0; font-size: 1.08rem; }
.cta-band .ctas { display: flex; flex-wrap: wrap; gap: 12px; justify-content: flex-end; position: relative; z-index: 1; }
.cta-band .btn-ghost { color: var(--paper); border-color: color-mix(in srgb, var(--paper) 35%, transparent); }
.cta-band .btn-ghost:hover { background: transparent; border-color: var(--paper); }
:root[data-theme="dark"] .cta-band { background: var(--surface-2); border: 1px solid var(--line-strong); }
:root[data-theme="dark"] .cta-band, :root[data-theme="dark"] .cta-band .btn-ghost { color: var(--ink); }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .cta-band { background: var(--surface-2); border: 1px solid var(--line-strong); color: var(--ink); }
  :root:not([data-theme="light"]) .cta-band .btn-ghost { color: var(--ink); }
}
@media (max-width: 860px) { .cta-band { grid-template-columns: 1fr; padding: 40px 28px; } .cta-band .ctas { justify-content: flex-start; } }

/* ---------- Footer ---------- */
.site-footer { padding: 72px 0 40px; border-top: 1px solid var(--line); margin-top: 104px; }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1.4fr; gap: 40px; }
.site-footer h4 { font: 600 12px var(--font-body); letter-spacing: .12em; text-transform: uppercase; color: var(--muted); margin-bottom: 14px; }
.site-footer ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.site-footer a { text-decoration: none; color: var(--ink-2); font-size: 15px; }
.site-footer a:hover { color: var(--ink); text-decoration: underline; }
.site-footer .about { color: var(--ink-2); font-size: 15px; max-width: 340px; margin-top: 16px; }
.site-footer .credit { font-size: 13.5px; color: var(--muted); }
.site-footer .credit a { font-size: 13.5px; }
.footer-base { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; margin-top: 56px; padding-top: 24px; border-top: 1px solid var(--line); font-size: 13.5px; color: var(--muted); }
@media (max-width: 860px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 520px) { .footer-grid { grid-template-columns: 1fr; } }

/* =========================================================
   TOOL PAGE
   ========================================================= */
.crumbs { display: flex; gap: 8px; align-items: center; font-size: 14px; color: var(--muted); flex-wrap: wrap; }
.crumbs a { text-decoration: none; color: var(--ink-2); }
.crumbs a:hover { color: var(--ink); text-decoration: underline; }

.tool-hero { padding: 40px 0 56px; position: relative; overflow: hidden; }
.tool-hero::before { content: ""; position: absolute; right: -180px; top: -140px; width: 620px; height: 620px; border-radius: 50%; background: radial-gradient(closest-side, color-mix(in srgb, var(--fam) 22%, transparent), transparent 72%); pointer-events: none; }
.tool-hero-grid { display: grid; grid-template-columns: auto minmax(0, 1fr); gap: 40px; align-items: center; margin-top: 32px; position: relative; }
.tool-hero h1 { font-size: clamp(3.2rem, 8vw, 6.4rem); letter-spacing: -.035em; line-height: .95; }
.tool-hero .tagline { font: 500 clamp(1.25rem, 2.2vw, 1.7rem)/1.3 var(--font-display); color: var(--ink-2); margin: 18px 0 0; max-width: 680px; }
.tool-hero .badges { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 18px; }
.facts { display: grid; grid-template-columns: repeat(5, 1fr); gap: 0; margin-top: 44px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); position: relative; }
.fact { padding: 18px 20px; border-left: 1px solid var(--line); }
.fact:first-child { border-left: 0; }
.fact dt { font: 600 11px var(--font-body); letter-spacing: .12em; text-transform: uppercase; color: var(--muted); margin-bottom: 6px; }
.fact dd { margin: 0; font-weight: 600; font-size: 15px; line-height: 1.35; }
.fact dd small { display: block; font-weight: 400; color: var(--ink-2); font-size: 13px; }
@media (max-width: 900px) { .facts { grid-template-columns: 1fr 1fr; } .fact { border-left: 0; border-top: 1px solid var(--line); } .fact:nth-child(-n+2) { border-top: 0; } .fact:nth-child(even) { border-left: 1px solid var(--line); } .fact:last-child { grid-column: 1 / -1; border-left: 0; } }
@media (max-width: 640px) { .tool-hero-grid { grid-template-columns: 1fr; gap: 20px; } .tool-hero .tile.big { width: 104px; } .tool-hero .tile.big .t-sym { font-size: 2.6rem; } }

/* Section nav */
.section-nav { position: sticky; top: var(--header-h); z-index: 40; background: color-mix(in srgb, var(--paper) 88%, transparent); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.section-nav .container { display: flex; align-items: center; gap: 4px; height: 56px; overflow-x: auto; scrollbar-width: none; }
.section-nav .container::-webkit-scrollbar { display: none; }
.section-nav a { display: inline-flex; align-items: center; gap: 8px; padding: 8px 14px; border-radius: 999px; text-decoration: none; font: 500 14.5px/1 var(--font-body); color: var(--ink-2); white-space: nowrap; }
.section-nav a .k { font: 500 11px var(--font-mono); color: var(--muted); }
.section-nav a:hover { color: var(--ink); background: var(--surface); }
.section-nav a.active { background: var(--ink); color: var(--paper); }
.section-nav a.active .k { color: var(--spark); }
.section-nav a.push { margin-left: auto; }
.section-nav a.ai-link.active, .section-nav a.ai-link:hover { background: var(--spark); color: var(--on-spark); }
.section-nav a.ai-link.active .k { color: var(--on-spark); }
.progress { position: absolute; left: 0; bottom: -1px; height: 2px; background: var(--fam); width: 0; }

.tsec { padding: 96px 0; border-bottom: 1px solid var(--line); }
.tsec:last-of-type { border-bottom: 0; }
.tsec-label { display: flex; align-items: center; gap: 14px; font: 600 13px var(--font-mono); color: var(--muted); letter-spacing: .04em; margin-bottom: 18px; }
.tsec-label b { color: var(--fam); font-weight: 600; }
.tsec-label::after { content: ""; flex: 1; height: 1px; background: var(--line); }
.tsec h2 { font-size: clamp(2.2rem, 4.4vw, 3.5rem); max-width: 820px; margin-bottom: 22px; }
.tsec .lead { font-size: 1.2rem; color: var(--ink-2); max-width: 720px; }
.prose { max-width: 68ch; }
.prose p { color: var(--ink-2); }
.prose strong { color: var(--ink); }
@media (max-width: 760px) { .tsec { padding: 64px 0; } }

/* What: lens explorer */
.what-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 56px; align-items: start; }
.origin { margin-top: 28px; padding: 18px 20px; border-radius: var(--radius); background: var(--surface); border: 1px solid var(--line); font-size: 15px; color: var(--ink-2); display: grid; grid-template-columns: 36px 1fr; gap: 14px; }
.origin svg { width: 22px; height: 22px; color: var(--fam); margin-top: 3px; }
.origin b { color: var(--ink); }
.acronym { display: flex; gap: 6px; margin: 28px 0 0; flex-wrap: wrap; }
.acronym span { min-width: 48px; height: 56px; padding: 0 6px; border-radius: 12px; display: grid; place-items: center; font: 700 1.6rem/1 var(--font-display); background: var(--c); color: var(--on-c, #16152A); box-shadow: inset 0 -4px 0 rgba(0,0,0,.08); }
.acronym span.long { font-size: 1.05rem; padding: 0 14px; }
.lens-explorer { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr); gap: 40px; align-items: center; margin-top: 64px; padding: 40px; border-radius: var(--radius-lg); background: var(--surface); border: 1px solid var(--line); box-shadow: var(--shadow); }
.wheel { width: 100%; max-width: 460px; margin: 0 auto; overflow: visible; }
.wheel .seg { cursor: pointer; transition: transform .3s cubic-bezier(.2,.8,.2,1), opacity .25s ease; outline: none; }
.wheel .seg path { fill: var(--c); stroke: var(--surface); stroke-width: 4; stroke-linejoin: round; transition: filter .2s; }
.wheel .seg:hover path { filter: brightness(1.05) saturate(1.1); }
.wheel .seg.active { transform: translate(var(--dx), var(--dy)); }
.wheel .seg.active path { stroke: var(--ink); stroke-width: 3; }
.wheel.has-active .seg:not(.active) { opacity: .5; }
.wheel.has-active .seg:not(.active):hover { opacity: .85; }
.wheel .seg:focus-visible path { stroke: var(--ink); stroke-width: 3; }
.wheel .seg-letter { font: 700 38px var(--font-display); fill: var(--on-c, #16152A); text-anchor: middle; pointer-events: none; }
.wheel .seg-verb { font: 600 11.5px var(--font-body); fill: var(--on-c, #16152A); text-anchor: middle; letter-spacing: .04em; text-transform: uppercase; pointer-events: none; opacity: .85; }
.wheel .hub { fill: var(--paper); stroke: var(--line-strong); stroke-width: 1.5; }
.wheel .hub-k { font: 600 10.5px var(--font-body); fill: var(--muted); text-anchor: middle; letter-spacing: .16em; text-transform: uppercase; }
.wheel .hub-t { font: 600 italic 21px var(--font-display); fill: var(--ink); text-anchor: middle; }
.wheel .orbit { fill: none; stroke: var(--line-strong); stroke-dasharray: 2 6; }
.lens-tabs { display: flex; gap: 6px; margin-bottom: 18px; flex-wrap: wrap; }
.lens-tabs button { min-width: 40px; height: 40px; padding: 0 10px; border-radius: 10px; border: 1.5px solid var(--line-strong); background: var(--surface); font: 700 1.1rem/1 var(--font-display); cursor: pointer; }
.lens-tabs button[aria-selected="true"] { background: var(--c); border-color: var(--c); color: var(--on-c, #16152A); }
.lens-card { display: none; }
.lens-card.active { display: block; animation: rise .35s ease; }
.no-js .lens-card { display: block; margin-bottom: 28px; }
@keyframes rise { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }
.lens-head { display: flex; align-items: center; gap: 16px; margin-bottom: 14px; }
.lens-letter { min-width: 64px; height: 64px; padding: 0 8px; border-radius: 18px; background: var(--c); color: var(--on-c, #16152A); display: grid; place-items: center; font: 700 2.4rem/1 var(--font-display); flex: none; }
.lens-letter.long { font-size: 1.3rem; padding: 0 16px; }
.lens-head h3 { font-size: 2rem; }
.lens-head .sub { font-size: 13.5px; color: var(--muted); margin-top: 4px; }
.lens-q { font: 500 1.3rem/1.35 var(--font-display); margin: 0 0 18px; }
.triggers { list-style: none; padding: 0; margin: 0 0 20px; display: grid; gap: 8px; }
.triggers li { position: relative; padding: 10px 14px 10px 40px; border-radius: 12px; background: var(--paper); font-size: 15px; color: var(--ink-2); }
.triggers li::before { content: "?"; position: absolute; left: 12px; top: 10px; width: 18px; height: 18px; border-radius: 50%; background: var(--c); color: var(--on-c, #16152A); font: 700 11px/18px var(--font-body); text-align: center; }
.lens-eg { display: flex; gap: 12px; align-items: flex-start; padding: 14px 16px; border-radius: 14px; border: 1.5px dashed color-mix(in srgb, var(--c) 70%, var(--line)); font-size: 15px; }
.lens-eg b { font: 600 11px var(--font-body); letter-spacing: .12em; text-transform: uppercase; color: var(--muted); white-space: nowrap; padding-top: 3px; }
.lens-nav { display: flex; gap: 8px; margin-top: 18px; }
@media (max-width: 980px) { .what-grid, .lens-explorer { grid-template-columns: 1fr; } .lens-explorer { padding: 24px; gap: 24px; } }

/* Why */
.why-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; margin-top: 44px; }
.why-card { padding: 30px; border-radius: var(--radius); background: var(--surface); border: 1px solid var(--line); position: relative; overflow: hidden; }
.why-card .w-ic { width: 52px; height: 52px; border-radius: 16px; display: grid; place-items: center; background: color-mix(in srgb, var(--fam) 14%, var(--surface)); color: color-mix(in srgb, var(--fam) 80%, var(--ink)); margin-bottom: 20px; }
.why-card .w-ic svg { width: 26px; height: 26px; }
.why-card h3 { font-size: 1.45rem; margin-bottom: 10px; }
.why-card p { color: var(--ink-2); margin: 0; }
.why-card .w-n { position: absolute; right: 22px; top: 14px; font: 600 4.5rem/1 var(--font-display); color: var(--surface-2); pointer-events: none; }
@media (max-width: 760px) { .why-grid { grid-template-columns: 1fr; } }

/* How */
.how-grid { display: grid; grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr); gap: 56px; margin-top: 44px; align-items: start; }
.steps { list-style: none; margin: 0; padding: 0; position: relative; counter-reset: step; }
.steps::before { content: ""; position: absolute; left: 23px; top: 12px; bottom: 12px; width: 2px; background: linear-gradient(var(--fam), color-mix(in srgb, var(--fam) 20%, transparent)); }
.steps li { position: relative; padding: 0 0 34px 72px; counter-increment: step; }
.steps li:last-child { padding-bottom: 0; }
.steps li::before { content: counter(step); position: absolute; left: 0; top: -4px; width: 48px; height: 48px; border-radius: 50%; display: grid; place-items: center; background: var(--surface); border: 2px solid var(--fam); font: 700 1.2rem/1 var(--font-display); color: var(--ink); }
.steps h3 { font-size: 1.35rem; margin-bottom: 6px; }
.steps p { color: var(--ink-2); margin: 0; }
.steps .time { display: inline-block; font: 500 12px var(--font-mono); color: var(--muted); margin-left: 8px; }
.side-stack { display: grid; gap: 16px; position: sticky; top: calc(var(--header-h) + 80px); }
.do-dont { border-radius: var(--radius); border: 1px solid var(--line); background: var(--surface); padding: 22px 24px; }
.do-dont h4 { font: 600 13px var(--font-body); letter-spacing: .1em; text-transform: uppercase; margin-bottom: 12px; display: flex; align-items: center; gap: 10px; }
.do-dont h4 i { width: 24px; height: 24px; border-radius: 50%; display: grid; place-items: center; font-style: normal; font-size: 13px; }
.do-dont.do h4 i { background: color-mix(in srgb, var(--select) 20%, var(--surface)); color: var(--select); }
.do-dont.dont h4 i { background: color-mix(in srgb, var(--implement) 18%, var(--surface)); color: var(--implement); }
.do-dont ul { margin: 0; padding-left: 18px; display: grid; gap: 8px; color: var(--ink-2); font-size: 15px; }
.kit { border-radius: var(--radius); background: var(--ink); color: var(--paper); padding: 22px 24px; }
.kit h4 { font: 600 13px var(--font-body); letter-spacing: .1em; text-transform: uppercase; color: var(--spark); margin-bottom: 10px; }
.kit p { margin: 0; color: color-mix(in srgb, var(--paper) 80%, transparent); font-size: 15px; }
:root[data-theme="dark"] .kit { background: var(--surface-2); color: var(--ink); }
:root[data-theme="dark"] .kit p { color: var(--ink-2); }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .kit { background: var(--surface-2); color: var(--ink); } :root:not([data-theme="light"]) .kit p { color: var(--ink-2); } }
@media (max-width: 980px) { .how-grid { grid-template-columns: 1fr; } .side-stack { position: static; } }

/* Example */
.case { margin-top: 44px; border-radius: var(--radius-lg); border: 1px solid var(--line); background: var(--surface); overflow: hidden; box-shadow: var(--shadow); }
.case-head { display: grid; grid-template-columns: 1fr auto; gap: 24px; align-items: center; padding: 28px 32px; border-bottom: 1px solid var(--line); background: color-mix(in srgb, var(--fam) 6%, var(--surface)); }
.case-head h3 { font-size: 1.6rem; margin: 6px 0 6px; }
.case-head p { margin: 0; color: var(--ink-2); }
.case-ideas { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--line); }
.case-ideas.cols-3 { grid-template-columns: repeat(3, 1fr); }
.idea.idea-sum { grid-template-columns: 1fr; align-content: center; background: color-mix(in srgb, var(--fam) 8%, var(--surface)); }
.idea.idea-sum p { font: italic 500 1.05rem/1.4 var(--font-display); color: var(--ink-2); }
@media (max-width: 1000px) { .case-ideas { grid-template-columns: repeat(2, 1fr); } .case-ideas.cols-3 { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 760px) { .case-ideas.cols-3 { grid-template-columns: 1fr; } }
@media (max-width: 560px) { .case-ideas { grid-template-columns: 1fr; } }
.idea { background: var(--surface); padding: 22px 24px; display: grid; grid-template-columns: auto 1fr; gap: 14px; align-items: start; }
.idea .il { min-width: 40px; height: 40px; padding: 0 6px; border-radius: 11px; background: var(--c); color: var(--on-c, #16152A); display: grid; place-items: center; font: 700 1.3rem/1 var(--font-display); }
.idea .il.long { font-size: .85rem; padding: 0 10px; }
.idea b { display: block; font-size: 12px; letter-spacing: .1em; text-transform: uppercase; color: var(--muted); margin-bottom: 4px; }
.idea p { margin: 0; font-size: 15px; }
.shortlist { padding: 26px 32px 30px; border-top: 1px solid var(--line); }
.shortlist h4 { font: 600 13px var(--font-body); letter-spacing: .1em; text-transform: uppercase; color: var(--muted); margin-bottom: 14px; }
.shortlist-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.shortlist-row.cols-1 { grid-template-columns: minmax(0, 420px); }
.shortlist-row.cols-2 { grid-template-columns: repeat(2, 1fr); }
.outcome-text { margin: 0; font: 500 1.1rem/1.5 var(--font-display); color: var(--ink-2); max-width: 820px; }
.pick { padding: 16px 18px; border-radius: 14px; border: 1px solid var(--line); background: var(--paper); }
.pick strong { display: block; margin-bottom: 10px; }
.nuf { display: flex; gap: 6px; }
.nuf span { flex: 1; display: flex; flex-direction: column; gap: 4px; font: 600 11px var(--font-body); color: var(--muted); letter-spacing: .06em; }
.nuf i { display: block; height: 6px; border-radius: 3px; background: var(--surface-2); position: relative; overflow: hidden; }
.nuf i::after { content: ""; position: absolute; inset: 0 auto 0 0; width: calc(var(--v) * 20%); background: var(--select); border-radius: 3px; }
@media (max-width: 760px) { .case-head { grid-template-columns: 1fr; padding: 22px; } .shortlist { padding: 22px; } .shortlist-row { grid-template-columns: 1fr; } }

/* Go AI */
.go-ai { background: var(--ink); color: var(--paper); position: relative; overflow: hidden; }
.go-ai::before { content: ""; position: absolute; inset: auto -10% -40% auto; width: 700px; height: 700px; border-radius: 50%; background: radial-gradient(closest-side, color-mix(in srgb, var(--spark) 22%, transparent), transparent 70%); pointer-events: none; }
.go-ai .tsec-label { color: color-mix(in srgb, var(--paper) 55%, transparent); }
.go-ai .tsec-label b { color: var(--spark); }
.go-ai .tsec-label::after { background: color-mix(in srgb, var(--paper) 18%, transparent); }
.go-ai .lead { color: color-mix(in srgb, var(--paper) 78%, transparent); }
.go-ai h2 em { color: var(--spark); font-weight: 500; }
:root[data-theme="dark"] .go-ai { background: #07060F; color: var(--ink); }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .go-ai { background: #07060F; color: var(--ink); } }
.split { display: grid; grid-template-columns: 1fr auto 1fr; gap: 0; margin-top: 48px; border-radius: var(--radius-lg); border: 1px solid color-mix(in srgb, var(--paper) 16%, transparent); position: relative; }
.split-col { padding: 30px 32px; }
.split-col h3 { font-size: 1.5rem; display: flex; align-items: center; gap: 12px; margin-bottom: 18px; }
.split-col h3 .who { width: 38px; height: 38px; border-radius: 50%; display: grid; place-items: center; font: 700 12px var(--font-body); letter-spacing: .04em; }
.split-col.you h3 .who { background: var(--paper); color: var(--ink); }
.split-col.ai h3 .who { background: var(--spark); color: var(--on-spark); }
:root[data-theme="dark"] .split-col.you h3 .who { background: var(--ink); color: var(--paper); }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .split-col.you h3 .who { background: var(--ink); color: var(--paper); } }
.split-col ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 12px; }
.split-col li { display: grid; grid-template-columns: 22px 1fr; gap: 10px; color: color-mix(in srgb, currentColor 82%, transparent); font-size: 15.5px; }
.split-col li svg { width: 18px; height: 18px; margin-top: 3px; }
.split-col.ai li svg { color: var(--spark); }
.split-mid { display: grid; place-items: center; padding: 0 8px; position: relative; }
.split-mid::before { content: ""; position: absolute; top: 24px; bottom: 24px; left: 50%; border-left: 1px dashed color-mix(in srgb, currentColor 25%, transparent); }
.split-mid span { position: relative; width: 52px; height: 52px; border-radius: 50%; display: grid; place-items: center; background: var(--spark); color: var(--on-spark); font-size: 20px; }
.moves { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin-top: 18px; }
.move { padding: 22px; border-radius: var(--radius); background: color-mix(in srgb, var(--paper) 6%, transparent); border: 1px solid color-mix(in srgb, var(--paper) 14%, transparent); display: flex; flex-direction: column; gap: 10px; }
:root[data-theme="dark"] .move { background: color-mix(in srgb, var(--ink) 4%, transparent); border-color: color-mix(in srgb, var(--ink) 12%, transparent); }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .move { background: color-mix(in srgb, var(--ink) 4%, transparent); border-color: color-mix(in srgb, var(--ink) 12%, transparent); } }
.move .mk { font: 600 11.5px var(--font-mono); color: var(--spark); letter-spacing: .06em; }
.move h3 { font-size: 1.25rem; }
.move p { margin: 0; font-size: 14.5px; color: color-mix(in srgb, currentColor 75%, transparent); }
.move code { margin-top: auto; display: block; padding: 10px 12px; border-radius: 10px; background: color-mix(in srgb, #000 30%, transparent); font: 400 12.5px/1.5 var(--font-mono); color: var(--code-ink); }
.watch { display: grid; grid-template-columns: auto 1fr; gap: 20px; align-items: start; margin-top: 18px; padding: 22px 26px; border-radius: var(--radius); border: 1.5px dashed color-mix(in srgb, var(--spark) 55%, transparent); }
.watch h3 { font-size: 1.15rem; color: var(--spark); white-space: nowrap; }
.watch ul { margin: 0; padding: 0; list-style: none; display: grid; grid-template-columns: repeat(2, 1fr); gap: 8px 28px; font-size: 15px; color: color-mix(in srgb, currentColor 80%, transparent); }
.watch li b { color: inherit; }
@media (max-width: 1000px) { .moves { grid-template-columns: 1fr 1fr; } }
@media (max-width: 760px) {
  .split { grid-template-columns: 1fr; }
  .split-mid { padding: 4px 0; }
  .split-mid::before { display: none; }
  .moves { grid-template-columns: 1fr; }
  .watch { grid-template-columns: 1fr; }
  .watch ul { grid-template-columns: 1fr; }
}

/* Prompt builder */
.prompt-wrap { display: grid; grid-template-columns: minmax(0, .85fr) minmax(0, 1.15fr); gap: 28px; margin-top: 44px; align-items: start; }
.builder { padding: 28px; border-radius: var(--radius-lg); background: var(--surface); border: 1px solid var(--line); box-shadow: var(--shadow); position: sticky; top: calc(var(--header-h) + 76px); }
.builder h3 { font-size: 1.35rem; margin-bottom: 6px; }
.builder > p { font-size: 14.5px; color: var(--ink-2); }
.field { display: grid; gap: 6px; margin-bottom: 16px; }
.field label { font: 600 13.5px var(--font-body); display: flex; justify-content: space-between; }
.field label span { font-weight: 400; color: var(--muted); }
.field input, .field textarea {
  width: 100%; border-radius: 12px; border: 1.5px solid var(--line-strong); background: var(--paper);
  padding: 11px 14px; font: 400 15px/1.45 var(--font-body); color: var(--ink); resize: vertical;
}
.field textarea { min-height: 64px; }
.field input:focus, .field textarea:focus { outline: none; border-color: var(--fam); background: var(--surface); box-shadow: 0 0 0 4px color-mix(in srgb, var(--fam) 16%, transparent); }
.seg-control { display: grid; grid-template-columns: 1fr 1fr; gap: 4px; padding: 4px; border-radius: 14px; background: var(--surface-2); margin-bottom: 20px; }
.seg-control button { border: 0; border-radius: 10px; padding: 10px 8px; background: transparent; cursor: pointer; font: 600 14px/1.2 var(--font-body); color: var(--ink-2); }
.seg-control button small { display: block; font-weight: 400; font-size: 12px; color: var(--muted); margin-top: 2px; }
.seg-control button[aria-pressed="true"] { background: var(--surface); color: var(--ink); box-shadow: var(--shadow-sm); }
.prompt-card { border-radius: var(--radius-lg); background: var(--code-bg); color: var(--code-ink); overflow: hidden; box-shadow: var(--shadow-lg); border: 1px solid color-mix(in srgb, var(--code-ink) 10%, transparent); }
.prompt-bar { display: flex; align-items: center; gap: 10px; padding: 14px 16px 14px 20px; border-bottom: 1px solid color-mix(in srgb, var(--code-ink) 12%, transparent); flex-wrap: wrap; }
.prompt-bar .dots { display: flex; gap: 6px; margin-right: 6px; }
.prompt-bar .dots i { width: 10px; height: 10px; border-radius: 50%; background: color-mix(in srgb, var(--code-ink) 22%, transparent); }
.prompt-bar .title { font: 500 13px var(--font-mono); color: color-mix(in srgb, var(--code-ink) 65%, transparent); margin-right: auto; }
.prompt-bar .btn { min-height: 36px; padding: 0 14px; font-size: 13.5px; }
.prompt-bar .btn-ghost { color: var(--code-ink); border-color: color-mix(in srgb, var(--code-ink) 25%, transparent); }
.prompt-bar .btn-ghost:hover { background: color-mix(in srgb, var(--code-ink) 8%, transparent); border-color: var(--code-ink); }
.prompt-body { padding: 24px 26px 28px; font: 400 13.8px/1.75 var(--font-mono); white-space: pre-wrap; word-wrap: break-word; max-height: 640px; overflow: auto; }
.prompt-body mark { background: color-mix(in srgb, var(--spark) 22%, transparent); color: var(--spark); border-radius: 5px; padding: 1px 5px; }
.prompt-body mark.empty { background: transparent; color: color-mix(in srgb, var(--spark) 75%, transparent); border: 1px dashed color-mix(in srgb, var(--spark) 55%, transparent); }
.prompt-body .h { color: #9FB8FF; font-weight: 500; }
.prompt-foot { display: flex; gap: 10px; align-items: center; padding: 14px 20px; border-top: 1px solid color-mix(in srgb, var(--code-ink) 12%, transparent); font-size: 13px; color: color-mix(in srgb, var(--code-ink) 60%, transparent); flex-wrap: wrap; }
.prompt-foot .open-in { display: flex; gap: 8px; margin-left: auto; flex-wrap: wrap; }
.prompt-foot a { color: var(--code-ink); text-decoration: none; padding: 7px 12px; border-radius: 999px; border: 1px solid color-mix(in srgb, var(--code-ink) 22%, transparent); font-size: 13px; font-weight: 500; }
.prompt-foot a:hover { border-color: var(--spark); color: var(--spark); }
.copied { background: var(--spark) !important; color: var(--on-spark) !important; border-color: var(--spark) !important; }
.followups { margin-top: 28px; }
.followups h3 { font-size: 1.3rem; margin-bottom: 6px; }
.followups > p { color: var(--ink-2); font-size: 15px; }
.fu-list { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-top: 14px; }
.fu { display: flex; align-items: flex-start; gap: 12px; padding: 14px 16px; border-radius: 14px; border: 1px solid var(--line); background: var(--surface); text-align: left; cursor: pointer; font-size: 14.5px; line-height: 1.45; transition: border-color .15s, transform .15s; }
.fu:hover { border-color: var(--ink-2); transform: translateY(-1px); }
.fu svg { width: 16px; height: 16px; flex: none; margin-top: 3px; color: var(--muted); }
.fu.copied svg { color: var(--on-spark); }
@media (max-width: 980px) { .prompt-wrap { grid-template-columns: 1fr; } .builder { position: static; } }
@media (max-width: 560px) { .fu-list { grid-template-columns: 1fr; } .prompt-body { padding: 18px; font-size: 13px; } }

/* Related + pager */
.related { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 12px; margin-top: 32px; }
.rel { display: grid; grid-template-columns: 64px 1fr; gap: 14px; align-items: center; padding: 14px; border-radius: var(--radius); background: var(--surface); border: 1px solid var(--line); text-decoration: none; transition: border-color .15s, transform .15s; }
.rel:hover { border-color: var(--fam); transform: translateY(-2px); }
.rel .tile { aspect-ratio: 1; padding: 6px 7px; border-radius: 10px; }
.rel .tile .t-sym { font-size: 1.6rem; }
.rel .tile .t-name { display: none; }
.rel .tile .t-mode { display: none; }
.rel strong { display: block; font-size: 15.5px; }
.rel span { font-size: 13.5px; color: var(--ink-2); line-height: 1.4; display: block; margin-top: 2px; }
.rel em { font-style: normal; font: 600 11px var(--font-body); letter-spacing: .1em; text-transform: uppercase; color: var(--fam); }
.pager { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 56px; }
.pager a { display: flex; flex-direction: column; gap: 4px; padding: 20px 24px; border-radius: var(--radius); border: 1px solid var(--line); text-decoration: none; background: var(--surface); }
.pager a:hover { border-color: var(--ink-2); }
.pager a.next { text-align: right; }
.pager small { font-size: 12.5px; color: var(--muted); letter-spacing: .08em; text-transform: uppercase; font-weight: 600; }
.pager b { font: 600 1.25rem var(--font-display); }
.further { margin-top: 28px; font-size: 14px; color: var(--muted); }


/* =========================================================
   Generated tool pages: explorer layouts + graphic library
   ========================================================= */
.tool-hero h1.long-name { font-size: clamp(2.6rem, 6vw, 4.6rem); }
.graphic-wrap { min-width: 0; }
.graphic { width: 100%; height: auto; overflow: visible; display: block; margin: 0 auto; }
.lens-explorer:not(.stacked) .graphic { max-width: 470px; }
.lens-explorer.stacked { grid-template-columns: 1fr; gap: 32px; }
.lens-explorer.stacked .graphic-wrap { padding-bottom: 28px; border-bottom: 1px dashed var(--line-strong); }
.g-caption { text-align: center; font: italic 500 1rem/1.4 var(--font-display); color: var(--ink-2); margin: 14px auto 0; max-width: 620px; }
.g-hint { text-align: center; font-size: 12.5px; color: var(--muted); margin: 8px 0 0; }
.graphic text { font-family: var(--font-body); fill: var(--ink); }
.graphic .seg { cursor: pointer; outline: none; transition: opacity .25s ease; }
.graphic .seg .shape { transition: stroke .2s, stroke-width .2s, filter .2s; }
.graphic .seg:hover .shape { filter: brightness(1.04) saturate(1.1); }
.graphic.has-active .seg:not(.active) { opacity: .45; }
.graphic.has-active .seg:not(.active):hover { opacity: .85; }
.graphic .seg.active .shape, .graphic .seg:focus-visible .shape { stroke: var(--ink); stroke-width: 3; }
.graphic .shape { fill: var(--c); stroke: var(--surface); stroke-width: 3; }
.graphic .shape.tint { fill: color-mix(in srgb, var(--c) 20%, var(--surface)); stroke: color-mix(in srgb, var(--c) 70%, var(--surface)); stroke-width: 2; }
.graphic .chip { fill: var(--c); }
.graphic .g-key { font-family: var(--font-display); font-weight: 700; text-anchor: middle; fill: var(--on-c, var(--ink)); pointer-events: none; }
.graphic .g-small { font-size: 10.5px; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; text-anchor: middle; fill: var(--on-c, var(--ink)); opacity: .85; pointer-events: none; }
.graphic .g-label { font-size: 14px; font-weight: 600; text-anchor: middle; }
.graphic .g-axis { stroke: var(--ink-2); stroke-width: 1.5; }
.graphic .g-axis-t { font-size: 11.5px; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; fill: var(--muted); text-anchor: middle; }
.graphic .g-pill { fill: var(--spark); }
.graphic .g-pill.dark { fill: var(--ink); }
.graphic .g-pill-t { font-size: 12.5px; font-weight: 700; text-anchor: middle; fill: var(--on-spark); }
.graphic .g-pill-t.light { fill: var(--paper); font-size: 13.5px; }
/* cycle */
.g-cycle .g-ring { fill: none; stroke: var(--line-strong); stroke-width: 1.5; stroke-dasharray: 3 7; }
.g-cycle .g-arc { fill: none; stroke: var(--ink-2); stroke-width: 2; }
.g-cycle .g-center-t { font: 600 italic 21px var(--font-display); text-anchor: middle; }
.g-cycle .g-center-s { font-size: 11px; font-weight: 600; letter-spacing: .1em; text-transform: uppercase; fill: var(--muted); text-anchor: middle; }
/* ladder */
.g-ladder .g-label { font-size: 15px; }
/* venn */
.g-venn .venn-c { fill: var(--c); fill-opacity: .42; stroke: var(--c); stroke-width: 2; }
.g-venn .seg.active .venn-c { fill-opacity: .7; stroke: var(--ink); stroke-width: 3; }
.g-venn .venn-k { fill: color-mix(in srgb, var(--c, var(--ink)) 40%, var(--ink)); }
/* funnel */
.g-funnel .g-key-in { font-family: var(--font-display); font-weight: 700; text-anchor: middle; fill: var(--on-c); pointer-events: none; }
.g-funnel .g-small-in { font-size: 11px; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; text-anchor: middle; fill: var(--on-c); pointer-events: none; }
.g-funnel .g-count { font: 600 13px var(--font-mono); fill: var(--muted); }
/* flow */
.g-flow .g-link { stroke: var(--ink-2); stroke-width: 2; }
.g-flow .g-end { fill: var(--ink); }
.g-flow .g-end-t { font-size: 14px; font-weight: 700; text-anchor: middle; fill: var(--paper); }
.g-flow .g-loop { fill: none; stroke: var(--ink-2); stroke-width: 1.8; stroke-dasharray: 5 6; }
.g-flow .g-loop-t { font: italic 500 14px var(--font-display); text-anchor: middle; fill: var(--muted); }
/* equation */
.g-equation .g-op { font: 600 52px var(--font-display); text-anchor: middle; fill: var(--muted); }
.g-equation .g-result-ring { fill: none; stroke: var(--spark); stroke-width: 6; }
.g-equation .g-small { font-size: 12px; }
/* quadrant */
.g-quadrant .g-key { fill: color-mix(in srgb, var(--c) 70%, var(--ink)); }
/* tree */
.g-tree .g-branch { fill: none; stroke: var(--c); stroke-width: 3; }
.g-tree .g-branch.thin { stroke-width: 2; opacity: .6; }
.g-tree .g-root { fill: var(--ink); }
.g-tree .g-root-t { font: 600 17px var(--font-display); text-anchor: middle; fill: var(--paper); }
.g-tree .g-node { fill: var(--c); }
.g-tree .g-node-t { font-size: 14.5px; font-weight: 700; text-anchor: middle; fill: #16152A; }
.g-tree .g-leaf { fill: color-mix(in srgb, var(--c) 14%, var(--surface)); stroke: color-mix(in srgb, var(--c) 55%, var(--surface)); stroke-width: 1.5; }
.g-tree .g-leaf-t { font-size: 14px; }
/* matrix */
.g-matrix .g-col { font-size: 12px; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; text-anchor: middle; fill: var(--muted); }
.g-matrix .g-row-bg { fill: var(--paper); }
.g-matrix .g-row-bg.alt { fill: var(--surface-2); }
.g-matrix .g-row-l { font-size: 14.5px; font-weight: 700; }
.g-matrix .g-cell { font-size: 14px; text-anchor: middle; fill: var(--ink-2); }
.g-matrix .g-cell.on { font-weight: 700; fill: var(--ink); }
.g-matrix .g-cell-hl { fill: color-mix(in srgb, var(--fam) 22%, var(--surface)); stroke: var(--fam); stroke-width: 1.5; }
.g-matrix .g-hl-path { fill: none; stroke: var(--fam); stroke-width: 3; stroke-dasharray: 6 6; opacity: .55; }
/* balance */
.g-balance .g-center-line { stroke: var(--ink); stroke-width: 2.5; stroke-dasharray: 2 6; stroke-linecap: round; }
.g-balance .g-side-t { font-size: 13px; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; }
.g-balance .g-side-t.left { fill: var(--select); }
.g-balance .g-side-t.right { fill: var(--implement); }
.g-balance .g-force.left { fill: color-mix(in srgb, var(--select) 75%, var(--surface)); }
.g-balance .g-force.right { fill: color-mix(in srgb, var(--implement) 75%, var(--surface)); }
.g-balance .g-force-t { font-size: 14px; font-weight: 600; }
/* split */
.g-split .g-center-line { stroke: var(--line-strong); stroke-width: 2; stroke-dasharray: 3 6; }
.g-split .g-head.left { fill: var(--ink); }
.g-split .g-head.right { fill: var(--fam); }
.g-split .g-head-t { font-size: 15px; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; text-anchor: middle; fill: var(--paper); }
.g-split .g-split-row { fill: var(--paper); }
.g-split .g-split-row.alt { fill: var(--surface-2); }
.g-split .g-q { fill: var(--surface); stroke: var(--line-strong); }
.g-split .g-q-t { font-size: 11.5px; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; text-anchor: middle; fill: var(--muted); dominant-baseline: middle; }
.g-split .g-split-t { font-size: 14.5px; dominant-baseline: middle; }
/* timeline */
.g-timeline .g-track { stroke: var(--line-strong); stroke-width: 3; stroke-linecap: round; }
.g-timeline .g-dir { stroke: var(--ink-2); stroke-width: 1.8; stroke-dasharray: 5 6; }
.g-timeline .g-dir-t { font: italic 500 14px var(--font-display); text-anchor: middle; fill: var(--muted); }
.g-timeline .g-tp { fill: var(--surface); stroke: var(--ink-2); stroke-width: 2.5; }
.g-timeline .g-tp.hot { fill: var(--implement); stroke: none; }
.g-timeline .g-hot-ring { fill: var(--implement); opacity: .16; }
.g-timeline .g-t { font: 600 12.5px var(--font-mono); text-anchor: middle; fill: var(--muted); }
.g-timeline .g-tl { font-size: 13.5px; font-weight: 600; }
.g-timeline .g-tl.hot { fill: var(--implement); }
.g-timeline .g-end-label { font-size: 11.5px; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; fill: var(--muted); }
/* curve */
.g-curve .g-area { fill: var(--c); fill-opacity: .6; stroke: var(--surface); stroke-width: 2; }
.g-curve .g-curve { fill: none; stroke: var(--ink); stroke-width: 2.5; }
.g-curve .g-track { stroke: var(--ink-2); stroke-width: 2; }
.g-curve .g-seg-l { font-size: 13px; font-weight: 700; text-anchor: middle; }
.g-curve .g-seg-p { font: 600 12px var(--font-mono); text-anchor: middle; fill: var(--ink-2); }
/* bars */
.g-bars .g-total { font-size: 12.5px; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; fill: var(--muted); }
.g-bars .g-bar-l { font-size: 14.5px; font-weight: 600; }
.g-bars .g-bar-bg { fill: var(--surface-2); }
.g-bars .g-bar { fill: var(--c); }
.g-bars .g-bar-v { font: 700 14px var(--font-mono); }
/* frames */
.g-frames .g-frame { fill: var(--paper); stroke: var(--ink); stroke-width: 2; }
.g-frames .g-frame-blob { fill: var(--c); fill-opacity: .35; }
.g-frames .g-glyph { fill: none; stroke: var(--ink); stroke-width: 2.6; stroke-linecap: round; stroke-linejoin: round; }
.g-frames .g-frame-n { fill: var(--ink); }
.g-frames .g-frame-nt { font-size: 12.5px; font-weight: 700; text-anchor: middle; fill: var(--paper); }
.g-frames .g-chev { fill: none; stroke: var(--muted); stroke-width: 2.5; stroke-linecap: round; stroke-linejoin: round; }
/* checklist */
.g-checklist .g-card { fill: var(--paper); stroke: var(--line-strong); }
.g-checklist .g-card-t { font: 600 20px var(--font-display); }
.g-checklist .g-card-rule { stroke: var(--line-strong); }
.g-checklist .g-box.yes { fill: var(--select); }
.g-checklist .g-box.no { fill: var(--implement); }
.g-checklist .g-box.maybe { fill: var(--ideate); }
.g-checklist .g-box-t { font-size: 17px; font-weight: 700; text-anchor: middle; fill: var(--paper); }
.g-checklist .g-check-l { font-size: 15px; }
/* grid9 */
.g-grid9 .g-spoke { stroke: var(--line-strong); stroke-width: 1.5; stroke-dasharray: 3 5; }
.g-grid9 .g-petal { fill: color-mix(in srgb, var(--c) 22%, var(--surface)); stroke: color-mix(in srgb, var(--c) 60%, var(--surface)); stroke-width: 1.5; }
.g-grid9 .g-petal-n { font: 600 11px var(--font-mono); fill: color-mix(in srgb, var(--c) 60%, var(--ink)); }
.g-grid9 .g-petal-t { font-size: 14px; font-weight: 600; }
.g-grid9 .g-core { fill: #16152A; }
.g-grid9 .g-core-t { font: 600 italic 18px var(--font-display); text-anchor: middle; fill: var(--spark); }
@media (max-width: 560px) {
  .lens-explorer { padding: 18px; }
  .lens-tabs { gap: 5px; }
  .lens-tabs button { min-width: 34px; height: 36px; padding: 0 8px; font-size: 1rem; }
  .lens-head h3 { font-size: 1.6rem; }
}
/* Wide diagrams stay legible on phones: keep a minimum size and let them swipe sideways. */
@media (max-width: 760px) {
  .lens-explorer.stacked .graphic-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; margin: 0 -6px; padding: 0 6px 22px; }
  .lens-explorer.stacked .graphic { min-width: 700px; }
  .lens-explorer.stacked .graphic-wrap::after { content: "← swipe to see the whole diagram →"; display: block; text-align: center; font-size: 12px; color: var(--muted); margin-top: 6px; position: sticky; left: 0; }
  .lens-explorer.stacked .g-caption, .lens-explorer.stacked .g-hint { position: sticky; left: 0; max-width: calc(100vw - 80px); }
}
/* Narrow-screen overflow guards */
.lens-explorer.stacked { grid-template-columns: minmax(0, 1fr); }
.lens-nav { flex-wrap: wrap; }
.pager { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
.pager b { overflow-wrap: anywhere; }
@media (max-width: 980px) { .what-grid, .lens-explorer { grid-template-columns: minmax(0, 1fr); } }
@media (max-width: 560px) {
  .pager { grid-template-columns: minmax(0, 1fr); }
  .pager a.next { text-align: left; }
  .lens-nav .btn { flex: 1 1 auto; }
}