/* Layout: a sheet of exercise paper. Faint grid ground, content on ruled columns, margin notes in mono. */
:root {
  --paper: #f5f7fb;
  --sheet: #ffffff;
  --ink: #12203a;
  --ink-2: #3a4a66;
  --muted: #5f6d85;
  --rule: #dbe1eb;
  --grid: rgba(18, 32, 58, 0.055);
  --curve: #1f4fb8;
  --curve-soft: rgba(31, 79, 184, 0.10);
  --saffron: #e3962b;
  --saffron-ink: #94560a;
  --on-accent: #12203a;
  --proof: #1c7a53;
  --proof-soft: #e2f2ea;

  --display: 'Newsreader', 'Iowan Old Style', Georgia, serif;
  --body: 'Public Sans', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --math: 'STIX Two Text', 'Cambria Math', 'Times New Roman', serif;
  --mono: 'IBM Plex Mono', ui-monospace, Menlo, Consolas, monospace;

  --page: 1120px;
  --r: 10px;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #0d1524; --sheet: #131d30; --ink: #e7edf6; --ink-2: #b6c2d5; --muted: #8a98ae;
    --rule: #26324a; --grid: rgba(231, 237, 246, 0.05); --curve: #82a8ff; --curve-soft: rgba(130, 168, 255, 0.14);
    --saffron: #f0a93e; --saffron-ink: #f4bb63; --on-accent: #12203a; --proof: #4cc08f; --proof-soft: #10352a;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --paper: #0d1524; --sheet: #131d30; --ink: #e7edf6; --ink-2: #b6c2d5; --muted: #8a98ae;
  --rule: #26324a; --grid: rgba(231, 237, 246, 0.05); --curve: #82a8ff; --curve-soft: rgba(130, 168, 255, 0.14);
  --saffron: #f0a93e; --saffron-ink: #f4bb63; --on-accent: #12203a; --proof: #4cc08f; --proof-soft: #10352a;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html, body { margin: 0; }
img, svg { max-width: 100%; }
[hidden] { display: none !important; }
body {
  background-color: var(--paper);
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 24px 24px;
  color: var(--ink);
  font: 400 16px/1.6 var(--body);
  padding-left: max(16px, env(safe-area-inset-left, 0px));
  padding-right: max(16px, env(safe-area-inset-right, 0px));
}
.wrap { max-width: var(--page); margin: 0 auto; }
h1, h2, h3 { font-family: var(--display); font-weight: 500; text-wrap: balance; margin: 0; letter-spacing: -0.01em; }
p { margin: 0; }
a { color: inherit; }
.m { font-family: var(--math); }
.m i, i.m { font-style: italic; }
.label { font: 500 12px/1.4 var(--mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted); }
:focus-visible { outline: 2px solid var(--saffron); outline-offset: 3px; border-radius: 4px; }

/* draft strip */

/* header */
header.top { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding-block: 20px; flex-wrap: wrap; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; }
.brand svg { width: 34px; height: 34px; }
.word { font: 500 27px/1 var(--display); letter-spacing: -0.015em; }
nav.links { display: flex; gap: 22px; align-items: center; font-size: 14.5px; color: var(--ink-2); flex-wrap: wrap; }
nav.links a { text-decoration: none; }
nav.links a:hover { color: var(--ink); text-decoration: underline; text-underline-offset: 4px; }

.btn { display: inline-flex; align-items: center; gap: 8px; font: 600 15px/1 var(--body); padding: 13px 20px; border-radius: 8px; border: 1px solid transparent; cursor: pointer; text-decoration: none; }
.btn.primary { background: var(--saffron); color: var(--on-accent); }
.btn.primary:hover { filter: brightness(1.05); }
.btn.ghost { background: transparent; color: var(--ink); border-color: var(--ink-2); }
.btn.ghost:hover { background: var(--sheet); }
.btn.small { padding: 9px 14px; font-size: 14px; }

/* hero */
.hero { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr); gap: 48px; align-items: center; padding-block: 40px 56px; }
.hero h1 { font-size: clamp(40px, 6vw, 68px); line-height: 1.02; }
.hero h1 .l { color: var(--curve); }
.hero h1 .p { color: var(--proof); }
.hero .lede { margin-top: 22px; font-size: 18.5px; line-height: 1.6; color: var(--ink-2); max-width: 34em; }
.hero .ctas { display: flex; gap: 12px; margin-top: 30px; flex-wrap: wrap; }
.hero .note { margin-top: 18px; font-size: 13.5px; color: var(--muted); }

/* the live figure */
.figure { background: var(--sheet); border: 1px solid var(--rule); border-radius: 14px; padding: 18px 18px 14px; box-shadow: 0 18px 40px -28px rgba(18, 32, 58, 0.45); min-width: 0; }
.fig-head { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; flex-wrap: wrap; }
.fig-head .q { font: 400 17px/1.4 var(--math); }
svg.plot { width: 100%; height: auto; display: block; margin-top: 8px; touch-action: none; user-select: none; }
svg.plot .gl { stroke: var(--grid); stroke-width: 1; }
svg.plot .ax { stroke: var(--muted); stroke-width: 1; }
svg.plot .tk { fill: var(--muted); font: 400 11px var(--mono); }
svg.plot .curve { fill: none; stroke: var(--curve); stroke-width: 2.6; stroke-linecap: round; }
svg.plot .tan { stroke: var(--saffron); stroke-width: 2.2; stroke-linecap: round; }
svg.plot .drop { stroke: var(--muted); stroke-width: 1; stroke-dasharray: 3 4; }
svg.plot .pt { fill: var(--saffron); stroke: var(--sheet); stroke-width: 3; cursor: grab; }
svg.plot .halo { fill: var(--saffron); opacity: 0.18; }
svg.plot .lab { fill: var(--ink); font: italic 400 15px var(--math); }
.readout { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 10px; margin-top: 10px; }
.readout div { border-top: 1px solid var(--rule); padding-top: 8px; min-width: 0; }
.readout .v { font: 400 19px/1.3 var(--math); margin-top: 2px; white-space: nowrap; overflow-x: auto; }
.slider { display: flex; align-items: center; gap: 12px; margin-top: 12px; }
.slider input { flex: 1; accent-color: var(--saffron); min-width: 0; }
.slider .label { white-space: nowrap; }
.frac { display: inline-flex; flex-direction: column; vertical-align: middle; text-align: center; font-size: 0.78em; line-height: 1.05; margin: 0 0.1em; }
.frac > span:first-child { border-bottom: 1px solid currentColor; padding: 0 0.15em; }

/* sections */
section.band { padding-block: 64px; border-top: 1px solid var(--rule); }
.sec-head { display: grid; grid-template-columns: 220px minmax(0, 1fr); gap: 32px; margin-bottom: 36px; align-items: start; }
.sec-head h2 { font-size: clamp(30px, 4vw, 42px); line-height: 1.1; }
.sec-head p.sub { margin-top: 12px; color: var(--ink-2); font-size: 17px; max-width: 40em; }

/* the four steps */
.steps { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 0; background: var(--sheet); border: 1px solid var(--rule); border-radius: 14px; overflow: hidden; }
.step { padding: 22px 22px 24px; border-right: 1px solid var(--rule); min-width: 0; display: flex; flex-direction: column; gap: 10px; }
.step:last-child { border-right: 0; }
.step .who { display: flex; align-items: baseline; gap: 10px; }
.step .num { font: 500 12px var(--mono); color: var(--muted); }
.step h3 { font-size: 23px; }
.step .what { font-size: 14.5px; color: var(--ink-2); }
.step .work { font: 400 16px/1.65 var(--math); padding-top: 10px; border-top: 1px dashed var(--rule); margin-top: auto; overflow-x: auto; }
.step.lemma h3 { color: var(--curve); }
.step.proof h3 { color: var(--proof); }
.ok { display: inline-flex; align-items: center; gap: 6px; margin-top: 8px; font: 500 12.5px var(--mono); color: var(--proof); background: var(--proof-soft); padding: 4px 9px; border-radius: 999px; }
.approve-state { font: 500 12.5px var(--mono); color: var(--muted); }
.approve-state.done { color: var(--proof); }

/* engines */
.engines { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); column-gap: 48px; }
.eng { display: grid; grid-template-columns: 54px minmax(0, 1fr); gap: 16px; padding-block: 22px; border-bottom: 1px solid var(--rule); }
.eng .g { font: 400 34px/1 var(--math); color: var(--curve); text-align: center; padding-top: 4px; }
.eng.proof .g, .eng.proof .n { color: var(--proof); }
.eng.lemma .g { color: var(--saffron-ink); }
.eng .n { font: 600 21px/1.2 var(--display); }
.eng .n span { font: 400 13px var(--mono); color: var(--muted); margin-left: 8px; letter-spacing: 0.02em; }
.eng .h { font-weight: 600; margin-top: 4px; }
.eng .d { color: var(--ink-2); font-size: 15px; margin-top: 4px; }
.eng .try { margin-top: 8px; font: 400 12.5px/1.5 var(--mono); color: var(--muted); }
.chant { margin-top: 36px; font: italic 400 clamp(19px, 2.4vw, 24px)/1.5 var(--display); color: var(--ink-2); max-width: 46em; }
.chant b { font-style: normal; font-weight: 600; color: var(--ink); }

/* platform */
.studio { display: grid; grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr); gap: 0; background: var(--sheet); border: 1px solid var(--rule); border-radius: 14px; overflow: hidden; }
.studio-main { padding: 26px; border-right: 1px solid var(--rule); min-width: 0; }
.studio-main h3 { font-size: 26px; margin-top: 6px; }
.tools { list-style: none; margin: 16px 0 0; padding: 0; display: grid; grid-template-columns: 1fr 1fr; gap: 14px 24px; }
.tools li { display: grid; gap: 2px; padding-top: 12px; border-top: 1px solid var(--rule); min-width: 0; }
.tools b { font: 600 17px/1.3 var(--display); }
.tools span { font-size: 14.5px; color: var(--ink-2); }
.studio-side { display: grid; grid-auto-rows: 1fr; background: var(--curve-soft); }
.studio-side > div { padding: 18px 22px; border-bottom: 1px solid var(--rule); min-width: 0; }
.studio-side > div:last-child { border-bottom: 0; }
.studio-side p { margin-top: 4px; font-size: 14.5px; color: var(--ink-2); }

/* live */
.live { display: grid; grid-template-columns: minmax(0, 0.8fr) minmax(0, 2fr); gap: 20px; align-items: start; }
.live-src { background: var(--sheet); border: 1px solid var(--rule); border-radius: var(--r); padding: 22px; display: grid; gap: 14px; min-width: 0; }
.field { display: grid; gap: 6px; font-size: 14px; color: var(--ink-2); }
.field input[type="text"] { font: 400 16px var(--body); color: var(--ink); background: var(--paper); border: 1px solid var(--rule); border-radius: 6px; padding: 9px 10px; width: 100%; }
.field input[type="range"] { accent-color: var(--saffron); width: 100%; }
.live-note { font-size: 13.5px; color: var(--muted); }
.live-stamp { display: flex; align-items: center; gap: 8px; font: 500 12.5px var(--mono); color: var(--proof); }
.live-stamp .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--proof); box-shadow: 0 0 0 4px var(--proof-soft); }
.live-out { display: grid; grid-template-columns: 1.5fr 1.2fr 0.7fr 1fr; gap: 14px; align-items: end; min-width: 0; }
.out { margin: 0; display: grid; gap: 8px; min-width: 0; }
.out .frame { background: var(--sheet); border: 1px solid var(--rule); border-radius: 8px; padding: 12px; overflow: hidden; min-width: 0; }
.out .o-title { font: 500 15px/1.25 var(--display); }
.out .o-eq { font-size: 15px; margin-top: 6px; color: var(--curve); white-space: nowrap; overflow-x: auto; }
.out .o-text { font-size: 12.5px; color: var(--ink-2); margin-top: 6px; }
.out.slide .frame { aspect-ratio: 16 / 9; background: var(--ink); color: var(--paper); border-color: var(--ink); max-width: 100%; }
.out.slide .slide-in { height: 100%; display: flex; flex-direction: column; justify-content: center; gap: 4px; position: relative; }
.out.slide .o-title { font-size: 18px; color: var(--paper); }
.out.slide .o-eq { color: var(--saffron); font-size: 17px; }
.out.slide .o-foot { position: absolute; bottom: 0; right: 0; font: 400 10px var(--mono); opacity: 0.6; }
.out.web .bar { display: flex; gap: 4px; margin: -4px 0 8px; }
.out.web .bar span { width: 7px; height: 7px; border-radius: 50%; background: var(--rule); }
.out.phone .frame { border-radius: 16px; border-width: 2px; padding: 16px 10px; min-height: 170px; display: flex; flex-direction: column; gap: 6px; }
.out.phone .o-title { font-size: 13px; }
.out.phone .o-eq { font-size: 13px; }
.out.phone .o-btn { margin-top: auto; font: 600 11px var(--body); background: var(--saffron); color: var(--on-accent); border-radius: 6px; padding: 6px; text-align: center; }
.out.paper .frame { background: #ffffff; color: #12203a; border-color: var(--rule); box-shadow: 2px 3px 0 var(--rule); }
.out.paper .o-text, .out.paper .o-key { font-size: 12px; color: #3a4a66; margin-top: 6px; }
.live-points { list-style: none; margin: 24px 0 0; padding: 0; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 20px; }
.live-points li { display: grid; gap: 4px; border-top: 1px solid var(--rule); padding-top: 12px; min-width: 0; }
.live-points b { font: 600 17px/1.3 var(--display); }
.live-points span { font-size: 14.5px; color: var(--ink-2); }

/* audiences + products */
.aud { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; }
.aud article { background: var(--sheet); border: 1px solid var(--rule); border-radius: var(--r); padding: 24px; display: flex; flex-direction: column; gap: 12px; min-width: 0; }
.aud h3 { font-size: 24px; }
.aud p { color: var(--ink-2); font-size: 15px; }
.chips { display: flex; flex-wrap: wrap; gap: 6px; margin-top: auto; padding-top: 6px; }
.chip { font: 500 12.5px var(--mono); padding: 4px 9px; border: 1px solid var(--rule); border-radius: 6px; color: var(--ink-2); }

/* partners */
.partners { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 2fr); gap: 20px; }
.partner-slot { border: 1.5px dashed var(--rule); border-radius: var(--r); padding: 24px; display: flex; flex-direction: column; justify-content: center; gap: 8px; min-width: 0; }
.partner-slot p { color: var(--muted); font-size: 14.5px; }
.partner-how { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); background: var(--sheet); border: 1px solid var(--rule); border-radius: var(--r); }
.partner-how > div { padding: 20px; border-right: 1px solid var(--rule); display: grid; gap: 4px; align-content: start; min-width: 0; }
.partner-how > div:last-child { border-right: 0; }
.partner-how b { font: 600 18px/1.3 var(--display); }
.partner-how span { font-size: 14.5px; color: var(--ink-2); }

/* plans */
.plans { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 0; border: 1px solid var(--rule); border-radius: 14px; overflow: hidden; background: var(--sheet); }
.plan { padding: 24px 22px; border-right: 1px solid var(--rule); display: flex; flex-direction: column; gap: 10px; min-width: 0; }
.plan:last-child { border-right: 0; }
.plan.feature { background: var(--curve-soft); }
.plan h3 { font-size: 22px; }
.plan .for { font-size: 14px; color: var(--muted); }
.plan .price { font: 500 30px/1.1 var(--display); font-variant-numeric: tabular-nums; }
.plan .price small { font: 400 13.5px var(--body); color: var(--muted); }
.plan ul { margin: 0; padding-left: 18px; font-size: 14.5px; color: var(--ink-2); display: grid; gap: 4px; }
.plan .btn { margin-top: auto; align-self: flex-start; }
.proposed { margin-top: 14px; font-size: 13px; color: var(--muted); }

/* brand kit */
.kit { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 20px; }
.tile { background: var(--sheet); border: 1px solid var(--rule); border-radius: var(--r); padding: 22px; min-width: 0; }
.tile h3 { font-size: 20px; margin-bottom: 14px; }
.logos { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.logo-box { border-radius: 8px; padding: 22px 16px; display: flex; align-items: center; justify-content: center; gap: 10px; }
.logo-box svg { width: 40px; height: 40px; }
.logo-box .word { font-size: 30px; }
.logo-box.light { background: #f5f7fb; color: #12203a; border: 1px solid #dbe1eb; }
.logo-box.dark { background: #0d1524; color: #e7edf6; }
.logo-note { margin-top: 12px; font-size: 14px; color: var(--ink-2); }
.swatches { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 10px; }
.sw { border: 1px solid var(--rule); border-radius: 8px; overflow: hidden; }
.sw .c { height: 52px; }
.sw .t { padding: 8px 10px; font: 400 12px/1.45 var(--mono); color: var(--ink-2); }
.sw .t b { display: block; font: 600 13px var(--body); color: var(--ink); }
.type-row { display: grid; grid-template-columns: 90px minmax(0, 1fr); gap: 14px; padding-block: 12px; border-bottom: 1px solid var(--rule); align-items: baseline; }
.type-row:last-child { border-bottom: 0; }
.voice { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.voice ul { margin: 8px 0 0; padding-left: 18px; display: grid; gap: 6px; font-size: 14.5px; color: var(--ink-2); }
.voice .yes .label { color: var(--proof); }
.voice .no .label { color: var(--saffron-ink); }

footer { padding-block: 40px 56px; border-top: 1px solid var(--rule); display: flex; justify-content: space-between; gap: 20px; flex-wrap: wrap; color: var(--muted); font-size: 14px; }

@media (max-width: 920px) {
  .hero { grid-template-columns: 1fr; gap: 32px; padding-block: 24px 40px; }
  .sec-head { grid-template-columns: 1fr; gap: 10px; }
  .steps { grid-template-columns: 1fr 1fr; }
  .step:nth-child(2) { border-right: 0; }
  .step:nth-child(-n+2) { border-bottom: 1px solid var(--rule); }
  .engines { grid-template-columns: 1fr; }
  .aud { grid-template-columns: 1fr 1fr; }
  .studio { grid-template-columns: 1fr; }
  .studio-main { border-right: 0; border-bottom: 1px solid var(--rule); }
  .plans { grid-template-columns: 1fr 1fr; }
  .plan:nth-child(2) { border-right: 0; }
  .plan:nth-child(-n+2) { border-bottom: 1px solid var(--rule); }
  .kit { grid-template-columns: 1fr; }
  .partners { grid-template-columns: 1fr; }
  .live { grid-template-columns: 1fr; }
  .live-out { grid-template-columns: 1fr 1fr; }
  .live-points { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 560px) {
  nav.links .opt { display: none; }
  .steps, .plans { grid-template-columns: 1fr; }
  .step, .plan { border-right: 0; border-bottom: 1px solid var(--rule); }
  .step:last-child, .plan:last-child { border-bottom: 0; }
  .readout { grid-template-columns: 1fr 1fr; }
  .readout div:last-child { grid-column: 1 / -1; }
  .swatches { grid-template-columns: 1fr 1fr; }
  .logos, .voice, .aud, .tools, .partner-how, .live-points { grid-template-columns: 1fr; }
  .partner-how > div { border-right: 0; border-bottom: 1px solid var(--rule); }
  .partner-how > div:last-child { border-bottom: 0; }
  section.band { padding-block: 48px; }
}
@media (prefers-reduced-motion: no-preference) {
  svg.plot .tan, svg.plot .pt, svg.plot .halo { transition: none; }
  .ok { transition: opacity .2s; }
}

/* ---- site shell (not in the brand page) ---- */
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
.skip { position: absolute; left: -999px; top: 8px; background: var(--sheet); padding: 8px 12px; border-radius: 6px; z-index: 10; }
.skip:focus { left: 16px; }
header.top { position: sticky; top: env(safe-area-inset-top, 0px); z-index: 5; background: color-mix(in srgb, var(--paper) 92%, transparent); backdrop-filter: blur(6px); }
nav.links a[aria-current="page"] { color: var(--ink); text-decoration: underline; text-underline-offset: 4px; }
details.menu { display: none; position: relative; }
details.menu summary { list-style: none; cursor: pointer; font: 600 14px var(--body); padding: 9px 12px; border: 1px solid var(--ink-2); border-radius: 8px; }
details.menu summary::-webkit-details-marker { display: none; }
details.menu .panel { position: absolute; right: 0; top: calc(100% + 8px); background: var(--sheet); border: 1px solid var(--rule); border-radius: 10px; padding: 8px; display: grid; min-width: 200px; box-shadow: 0 18px 40px -24px rgba(18, 32, 58, 0.5); }
details.menu .panel a { padding: 10px 12px; text-decoration: none; border-radius: 6px; }
details.menu .panel a:hover { background: var(--paper); }
@media (max-width: 560px) { details.menu { display: block; } }
.cta-band { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 24px; align-items: center; background: var(--ink); color: var(--paper); border-radius: 16px; padding: 32px; }
.cta-band h2 { font-size: clamp(26px, 3.4vw, 36px); color: var(--paper); }
.cta-band p { color: color-mix(in srgb, var(--paper) 80%, transparent); margin-top: 8px; }
.cta-band .btn.ghost { color: var(--paper); border-color: color-mix(in srgb, var(--paper) 60%, transparent); }
.cta-band .btn.ghost:hover { background: transparent; border-color: var(--paper); }
.cta-band .ctas { display: flex; gap: 12px; flex-wrap: wrap; }
@media (max-width: 720px) { .cta-band { grid-template-columns: 1fr; padding: 24px; } }
.page-head { padding-block: 40px 28px; }
.page-head h1 { font-size: clamp(36px, 5vw, 56px); line-height: 1.05; margin-top: 10px; }
.page-head p { margin-top: 16px; font-size: 18px; color: var(--ink-2); max-width: 40em; }
.prose { max-width: 44em; padding-block: 8px 64px; }
.prose h2 { font-size: 24px; margin-top: 36px; }
.prose h3 { font-size: 19px; margin-top: 24px; }
.prose p, .prose li { color: var(--ink-2); margin-top: 10px; }
.prose ul { padding-left: 20px; }
.prose .meta { font: 400 13px var(--mono); color: var(--muted); }
.rule-table { width: 100%; border-collapse: collapse; margin-top: 16px; font-size: 15px; }
.rule-table th, .rule-table td { text-align: left; padding: 12px 10px; border-bottom: 1px solid var(--rule); vertical-align: top; }
.rule-table th { font: 500 12px var(--mono); text-transform: uppercase; letter-spacing: .06em; color: var(--muted); }
.table-wrap { overflow-x: auto; }
.faq { display: grid; gap: 0; border-top: 1px solid var(--rule); }
.faq details { border-bottom: 1px solid var(--rule); padding-block: 16px; }
.faq summary { cursor: pointer; font: 600 17px/1.4 var(--display); }
.faq p { margin-top: 8px; color: var(--ink-2); max-width: 46em; }
/* forms */
.form-grid { display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr); gap: 32px; padding-bottom: 64px; align-items: start; }
form.card { background: var(--sheet); border: 1px solid var(--rule); border-radius: 14px; padding: 26px; display: grid; gap: 16px; min-width: 0; }
.row2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.f { display: grid; gap: 6px; min-width: 0; }
.f label { font: 600 14px var(--body); }
.f .hint { font-size: 13px; color: var(--muted); font-weight: 400; }
.f input, .f select, .f textarea { font: 400 16px var(--body); color: var(--ink); background: var(--paper); border: 1px solid var(--rule); border-radius: 8px; padding: 11px 12px; width: 100%; }
.f textarea { min-height: 110px; resize: vertical; }
.f input:focus, .f select:focus, .f textarea:focus { outline: 2px solid var(--saffron); outline-offset: 1px; border-color: transparent; }
.hp { position: absolute; left: -5000px; width: 1px; height: 1px; overflow: hidden; }
.form-msg { font-size: 15px; padding: 12px 14px; border-radius: 8px; }
.form-msg.ok { background: var(--proof-soft); color: var(--proof); }
.form-msg.err { background: color-mix(in srgb, var(--saffron) 16%, transparent); color: var(--saffron-ink); }
.side-note { display: grid; gap: 18px; }
.side-note .tile p { color: var(--ink-2); font-size: 15px; margin-top: 6px; }
.side-note ol { margin: 8px 0 0; padding-left: 20px; color: var(--ink-2); font-size: 15px; display: grid; gap: 6px; }
.addr { font: 400 14px/1.6 var(--mono); color: var(--ink-2); user-select: all; }
@media (max-width: 820px) { .form-grid { grid-template-columns: 1fr; } }
@media (max-width: 560px) { .row2 { grid-template-columns: 1fr; } }
footer .cols { display: flex; gap: 40px; flex-wrap: wrap; }
footer .cols div { display: grid; gap: 6px; align-content: start; }
footer .cols a { text-decoration: none; color: var(--ink-2); }
footer .cols a:hover { color: var(--ink); text-decoration: underline; }
footer .legal { width: 100%; font-size: 13px; }

/* agents */
.agent-list { display: grid; border-top: 1px solid var(--rule); }
.agent { display: grid; grid-template-columns: 200px minmax(0, 1fr); gap: 20px; padding-block: 16px; border-bottom: 1px solid var(--rule); align-items: baseline; }
.agent b { font: 600 20px/1.2 var(--display); }
.agent span { color: var(--ink-2); }
.sub-h { font-size: 22px; margin: 36px 0 14px; }
@media (max-width: 560px) { .agent { grid-template-columns: 1fr; gap: 4px; } }

/* Lemma, the assistant */
.lemma-launch { position: fixed; z-index: 40; right: calc(18px + env(safe-area-inset-right, 0px)); bottom: calc(18px + env(safe-area-inset-bottom, 0px)); display: inline-flex; align-items: center; gap: 8px; padding: 10px 16px 10px 12px; border-radius: 999px; border: 1px solid var(--ink); background: var(--ink); color: var(--paper); font: 600 15px var(--body); cursor: pointer; box-shadow: 0 14px 30px -14px rgba(18, 32, 58, 0.6); }
.lemma-launch svg { width: 24px; height: 24px; }
.lemma-launch:hover { filter: brightness(1.1); }
.lemma-panel { position: fixed; z-index: 41; right: calc(18px + env(safe-area-inset-right, 0px)); bottom: calc(76px + env(safe-area-inset-bottom, 0px)); width: min(400px, calc(100vw - 36px)); height: min(620px, calc(100vh - 110px)); display: flex; flex-direction: column; background: var(--sheet); color: var(--ink); border: 1px solid var(--rule); border-radius: 16px; box-shadow: 0 30px 60px -24px rgba(18, 32, 58, 0.55); overflow: hidden;
  --border: var(--rule); --border2: var(--rule); --surface: var(--paper); --surface2: var(--sheet); --t1: var(--ink); --t2: var(--ink-2); --t3: var(--muted); --t4: var(--muted); --accent: var(--curve); }
.lemma-panel.full { inset: 0; width: auto; height: auto; border-radius: 0; padding-top: env(safe-area-inset-top, 0px); padding-bottom: env(safe-area-inset-bottom, 0px); }
.lemma-panel.full .lemma-talk, .lemma-panel.full .lemma-ask, .lemma-panel.full .lemma-foot { width: 100%; max-width: 760px; margin-inline: auto; }
@media (max-width: 640px) { .lemma-panel { inset: 0; width: auto; height: auto; border-radius: 0; padding-top: env(safe-area-inset-top, 0px); padding-bottom: env(safe-area-inset-bottom, 0px); } }
html.lemma-locked, html.lemma-locked body { overflow: hidden; }
.lemma-head { display: flex; justify-content: space-between; align-items: center; gap: 12px; padding: 12px 14px; border-bottom: 1px solid var(--rule); background: var(--ink); color: var(--paper); }
.lemma-head b { font: 600 18px var(--display); display: block; }
.lemma-head span { font: 400 12px var(--mono); opacity: .75; }
.lemma-tools { display: flex; gap: 6px; }
.lemma-tool { background: transparent; color: var(--paper); border: 1px solid color-mix(in srgb, var(--paper) 35%, transparent); border-radius: 6px; padding: 5px 9px; font: 500 12.5px var(--body); cursor: pointer; }
.lemma-tool:hover { border-color: var(--paper); }
.lemma-talk { flex: 1; overflow-y: auto; padding: 14px; display: flex; flex-direction: column; gap: 10px; background: var(--paper); }
.lemma-msg { align-self: flex-start; max-width: 92%; background: var(--sheet); border: 1px solid var(--rule); border-radius: 12px 12px 12px 4px; padding: 10px 12px; font-size: 15px; line-height: 1.55; min-width: 0; }
.lemma-msg p { margin: 0; }
.lemma-msg.mine { align-self: flex-end; background: var(--ink); color: var(--paper); border-color: var(--ink); border-radius: 12px 12px 4px 12px; }
.lemma-msg.waiting { color: var(--muted); font-style: italic; }
.lemma-msg.notice { border-color: var(--saffron); color: var(--saffron-ink); }
.lemma-body > * + * { margin-top: 8px; }
.lemma-body p { margin: 0; }
.lemma-body ul, .lemma-body ol, .lemma-body .apc-list { margin: 0; padding-left: 20px; }
.lemma-body .apc-table { border-collapse: collapse; display: block; overflow-x: auto; max-width: 100%; font-size: 14px; }
.lemma-body .apc-table th, .lemma-body .apc-table td { border: 1px solid var(--rule); padding: 6px 8px; text-align: left; vertical-align: top; }
.lemma-body .apc-table th { background: var(--paper); font-weight: 600; }
.lemma-body .apc-callout { border: 1px solid var(--rule); border-left: 3px solid var(--curve); border-radius: 8px; padding: 8px 10px; background: var(--paper); }
.lemma-body .apc-callout-label { font: 500 11px var(--mono); text-transform: uppercase; letter-spacing: .06em; color: var(--curve); margin-bottom: 4px; }
.lemma-body h3, .lemma-body h4 { font: 600 16px var(--display); margin: 4px 0 0; }
.lemma-body .apas-agent-block { margin: 8px 0 0; background: var(--paper); color: var(--ink); border-color: var(--rule); border-radius: 10px; }
.lemma-body .apas-agent-head { font: 500 11px var(--mono); color: var(--muted); padding: 8px 10px; }
.lemma-body .apas-agent-body { padding: 10px; }
.lemma-body .apas-action { font: 600 14px var(--body); padding: 8px 12px; border-radius: 8px; background: var(--sheet); color: var(--ink); border: 1px solid var(--ink-2); }
.lemma-body .apas-action[data-variant="primary"] { background: var(--saffron); color: var(--on-accent); border-color: var(--saffron); }
.lemma-starters { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 10px; }
.lemma-chip { font: 500 13px var(--body); padding: 6px 10px; border-radius: 999px; border: 1px solid var(--rule); background: var(--paper); color: var(--ink-2); cursor: pointer; text-align: left; }
.lemma-chip:hover { border-color: var(--ink-2); color: var(--ink); }
.lemma-form { display: grid; gap: 6px; width: 92%; }
.lemma-form label { font: 600 13px var(--body); }
.lemma-form input { font: 400 15px var(--body); color: var(--ink); background: var(--paper); border: 1px solid var(--rule); border-radius: 8px; padding: 8px 10px; width: 100%; }
.lemma-form .btn { justify-self: start; margin-top: 4px; }
.lemma-form-title { font: 600 16px var(--display); }
.lemma-form-msg { font-size: 13px; color: var(--saffron-ink); min-height: 0; }
.lemma-form.done { border-color: var(--proof); color: var(--proof); }
.lemma-ask { display: flex; gap: 8px; padding: 10px 12px; border-top: 1px solid var(--rule); background: var(--sheet); align-items: flex-end; }
.lemma-ask textarea { flex: 1; min-width: 0; resize: none; font: 400 15px/1.4 var(--body); color: var(--ink); background: var(--paper); border: 1px solid var(--rule); border-radius: 10px; padding: 9px 10px; max-height: 120px; }
.lemma-ask textarea:focus { outline: 2px solid var(--saffron); outline-offset: 1px; border-color: transparent; }
.lemma-foot { margin: 0; padding: 0 12px 10px; font-size: 11.5px; color: var(--muted); background: var(--sheet); }
@media print { .lemma-launch, .lemma-panel { display: none !important; } }