/* FRQ. One page, no build step, system fonts only (nothing is loaded from another site). */

:root {
  --paper: #f5f3ee;
  --card: #fffefb;
  --ink: #14130f;
  --soft: #3d3b35;
  --muted: #6b675d;
  --line: #dcd8cd;
  --line-strong: #bdb8ab;
  --accent: #e2431b;          /* bars, marks and large figures */
  --accent-text: #b8300d;     /* the same colour, dark enough for small text */
  --accent-soft: #fbe6de;
  --code-bg: #14130f;
  --code-ink: #ece8de;
  --code-key: #ff9a76;
  --code-str: #bcd9ab;
  --code-num: #a3c8f2;
  --code-dim: #8d887b;
  --shadow: 0 1px 0 var(--line), 0 30px 60px -36px rgba(20, 19, 15, .35);

  --sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI Variable Text", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --display: "Segoe UI Variable Display", ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "Cascadia Code", "SF Mono", SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;

  --wrap: 1120px;
  --gutter: clamp(20px, 4vw, 40px);
  --radius: 12px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #0f0f0d;
    --card: #181816;
    --ink: #f2efe8;
    --soft: #d2cec3;
    --muted: #9a9588;
    --line: #2b2a26;
    --line-strong: #4a4841;
    --accent: #ff5a2b;
    --accent-text: #ff7a52;
    --accent-soft: #33170e;
    --code-bg: #1b1b18;
    --shadow: 0 1px 0 var(--line), 0 30px 60px -36px rgba(0, 0, 0, .8);
  }
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 76px; -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 400 17px/1.55 var(--sans);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, p, ol, ul, dl, dd, figure, pre { margin: 0; }
ol, ul { padding: 0; list-style: none; }
a { color: inherit; }
[hidden] { display: none !important; }

:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }

.wrap { width: 100%; max-width: calc(var(--wrap) + 2 * var(--gutter)); margin-inline: auto; padding-inline: var(--gutter); }

.skip { position: absolute; left: 12px; top: -60px; z-index: 20; padding: 10px 14px; background: var(--ink); color: var(--paper); border-radius: 8px; text-decoration: none; }
.skip:focus { top: 12px; }

/* ---------- header ---------- */

.top { position: sticky; top: 0; z-index: 10; background: color-mix(in srgb, var(--paper) 88%, transparent); backdrop-filter: saturate(1.4) blur(10px); -webkit-backdrop-filter: saturate(1.4) blur(10px); border-bottom: 1px solid var(--line); }
.top-row { display: flex; align-items: center; gap: 28px; height: 60px; }

.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; }
.mark { width: 22px; height: 22px; flex: none; }
.mark-one { fill: var(--accent); }
.mark-two { fill: var(--ink); opacity: .55; }
.mark-three { fill: var(--ink); opacity: .28; }
.brand-name { font: 700 19px/1 var(--display); letter-spacing: .04em; }

.nav { display: flex; gap: 26px; margin-left: auto; }
.nav a { font-size: 15px; color: var(--soft); text-decoration: none; padding-block: 6px; }
.nav a:hover { color: var(--ink); text-decoration: underline; text-underline-offset: 5px; text-decoration-color: var(--accent); }

/* ---------- buttons and links ---------- */

.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 48px; padding: 0 22px; border: 1px solid var(--ink); border-radius: 999px; background: var(--ink); color: var(--paper); font: 600 16px/1 var(--sans); text-decoration: none; cursor: pointer; transition: transform .15s ease, background-color .15s ease, color .15s ease; }
.btn:hover { background: var(--paper); color: var(--ink); }
.btn:active { transform: translateY(1px); }
.btn-small { min-height: 38px; padding: 0 16px; font-size: 14px; }
.btn[disabled] { opacity: .55; cursor: progress; }

.btn-secondary { background: transparent; color: var(--ink); border: 1px solid var(--line-strong); }
.btn-secondary:hover { background: var(--card); border-color: var(--ink); color: var(--ink); }
.hf-icon { flex: none; stroke: currentColor; }

.btn-ghost { margin-top: 18px; min-height: 42px; padding: 0 18px; border: 1px solid var(--line-strong); border-radius: 999px; background: transparent; color: var(--ink); font: 500 15px/1 var(--sans); cursor: pointer; }
.btn-ghost:hover { border-color: var(--ink); }

.link-arrow { font-weight: 500; text-decoration: underline; text-underline-offset: 5px; text-decoration-color: var(--line-strong); }
.link-arrow::after { content: " \2193"; }
.link-arrow:hover { text-decoration-color: var(--accent); }

/* ---------- hero ---------- */

.hero { padding-block: clamp(40px, 6vw, 80px) clamp(56px, 8vw, 104px); }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr); gap: clamp(32px, 5vw, 72px); align-items: center; }

.hero-badge { display: inline-flex; align-items: center; gap: 10px; padding: 6px 14px; border-radius: 999px; background: color-mix(in srgb, var(--line) 40%, transparent); border: 1px solid var(--line-strong); font: 500 12.5px/1.2 var(--mono); color: var(--ink); margin-bottom: 20px; }
.live-pulse { width: 8px; height: 8px; border-radius: 50%; background: #10b981; box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); animation: pulse-green 2s infinite; flex: none; }
@keyframes pulse-green {
  0% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
  70% { box-shadow: 0 0 0 7px rgba(16, 185, 129, 0); }
  100% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}
.badge-tag { padding: 2px 7px; border-radius: 4px; background: var(--ink); color: var(--paper); font-size: 11px; letter-spacing: .05em; font-weight: 600; }

.eyebrow { display: flex; align-items: center; gap: 10px; margin-bottom: 22px; font: 500 12.5px/1.4 var(--mono); letter-spacing: .09em; text-transform: uppercase; color: var(--muted); }
.dot { width: 8px; height: 8px; border-radius: 50%; background: var(--accent); flex: none; }

h1 { margin-top: 10px; font: 650 clamp(32px, 3.4vw, 48px)/1.12 var(--display); letter-spacing: -.025em; text-wrap: balance; }
.lead { max-width: 33em; margin-top: 16px; font-size: clamp(17px, 1.4vw, 19px); line-height: 1.6; color: var(--soft); }
.hero-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 16px; margin-top: 28px; }

.hero-trust { display: flex; flex-wrap: wrap; gap: 18px; margin-top: 22px; font: 500 13px/1.4 var(--sans); color: var(--muted); }
.trust-item { display: inline-flex; align-items: center; gap: 6px; }
.trust-check { color: #10b981; font-weight: 700; }

/* the decision card */

.decision { background: var(--card); border: 1px solid var(--line-strong); border-radius: 16px; box-shadow: var(--shadow); overflow: hidden; }
.decision-tabs { display: flex; flex-wrap: wrap; gap: 6px; padding: 12px; border-bottom: 1px solid var(--line); }
.tab { padding: 8px 12px; border: 1px solid transparent; border-radius: 999px; background: transparent; color: var(--muted); font: 500 13px/1 var(--sans); cursor: pointer; transition: all .15s ease; }
.tab:hover { color: var(--ink); background: color-mix(in srgb, var(--line) 30%, transparent); }
.tab[aria-pressed="true"] { background: var(--ink); color: var(--paper); }

.decision-body { padding: 6px 20px 8px; }
.field { display: grid; grid-template-columns: 84px minmax(0, 1fr); gap: 12px; padding-block: 14px; border-bottom: 1px solid var(--line); }
.field:last-child { border-bottom: 0; }
.label { padding-top: 3px; font: 500 11.5px/1.4 var(--mono); letter-spacing: .09em; text-transform: uppercase; color: var(--muted); }
.state { font: 400 13px/1.55 var(--mono); color: var(--soft); white-space: pre-wrap; overflow-wrap: anywhere; }
.question { font-weight: 600; font-size: 16.5px; line-height: 1.4; }

.options { display: grid; gap: 12px; }
.option { display: grid; grid-template-columns: minmax(0, 1fr) auto; column-gap: 12px; row-gap: 6px; align-items: baseline; }
.option-name { font-size: 15px; color: var(--soft); }
.option-pct { font: 500 13px/1 var(--mono); font-variant-numeric: tabular-nums; color: var(--muted); }
.option-bar { grid-column: 1 / -1; height: 6px; border-radius: 3px; background: var(--line); overflow: hidden; }
.option-bar i { display: block; height: 100%; min-width: 2px; border-radius: 3px; background: var(--line-strong); transition: width .6s cubic-bezier(.2, .8, .2, 1); }
.option.is-chosen .option-name { color: var(--ink); font-weight: 650; }
.option.is-chosen .option-name::after { content: "chosen"; margin-left: 10px; padding: 2px 6px; border-radius: 4px; background: var(--accent-soft); color: var(--accent-text); font: 500 10px/1 var(--mono); letter-spacing: .08em; text-transform: uppercase; vertical-align: 2px; }
.option.is-chosen .option-pct { color: var(--ink); font-weight: 600; }
.option.is-chosen .option-bar i { background: var(--accent); }

.decision-telemetry { display: flex; flex-wrap: wrap; align-items: center; gap: 14px; padding: 12px 20px; border-top: 1px solid var(--line); background: color-mix(in srgb, var(--paper) 60%, transparent); font: 500 11.5px/1 var(--mono); color: var(--muted); }
.telemetry-item { display: inline-flex; align-items: center; gap: 6px; }
.telemetry-dot.live { width: 6px; height: 6px; border-radius: 50%; background: #10b981; }
.telemetry-badge { margin-left: auto; padding: 3px 8px; border-radius: 4px; background: color-mix(in srgb, var(--line) 70%, transparent); color: var(--ink); font-size: 11px; }

/* the letters FRQ, flipping through what they stand for */
.frq { margin-top: 40px; padding-top: 24px; border-top: 1px solid var(--line); }
.frq-letters { font: 650 clamp(36px, 4.5vw, 64px)/1.04 var(--display); letter-spacing: -.04em; }
.frq-row { display: flex; align-items: baseline; height: 1.04em; white-space: nowrap; }   /* fixed: an empty word must not change the height */
.frq-word { perspective: 700px; color: color-mix(in srgb, var(--ink) 40%, transparent); }
.frq-flip { display: inline-block; min-height: 1em; transform-origin: 50% 58%; transition: transform .26s cubic-bezier(.25, .7, .3, 1), opacity .26s ease; }
.frq-flip.is-out { transform: rotateX(-84deg); opacity: 0; transition-timing-function: ease-in; }
.frq-flip.is-pre { transform: rotateX(84deg); opacity: 0; transition: none; }
.frq-caption { max-width: 33em; min-height: 4.5em; margin-top: 16px; font-size: 16px; line-height: 1.5; color: var(--muted); transition: opacity .22s ease; }
.frq-caption.is-out { opacity: 0; }
.frq-controls { display: flex; align-items: center; gap: 2px; margin-top: 8px; margin-left: -9px; }
.frq-dot { display: grid; place-items: center; width: 26px; height: 26px; padding: 0; border: 0; border-radius: 50%; background: transparent; cursor: pointer; }
.frq-dot::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: var(--line-strong); transition: background-color .2s ease, transform .2s ease; }
.frq-dot:hover::before { background: var(--muted); }
.frq-dot[aria-pressed="true"]::before { background: var(--accent); transform: scale(1.3); }
.frq-pause { margin-left: 8px; padding: 6px 2px; border: 0; background: transparent; color: var(--muted); font: 500 13px/1 var(--sans); text-decoration: underline; text-underline-offset: 4px; cursor: pointer; }
.frq-pause:hover { color: var(--ink); }

/* ---------- sections ---------- */

main { counter-reset: section; }
.section { counter-increment: section; border-top: 1px solid var(--line); padding-block: clamp(56px, 8vw, 104px); }
.section-grid { display: grid; grid-template-columns: 190px minmax(0, 1fr); gap: clamp(24px, 4vw, 56px); }
.section-num { position: sticky; top: 92px; font: 500 12.5px/1.4 var(--mono); letter-spacing: .09em; text-transform: uppercase; color: var(--muted); }
.section-num::before { content: counter(section, decimal-leading-zero) "\00a0\00a0/\00a0\00a0"; color: var(--accent-text); }

h2 { max-width: 20em; font: 650 clamp(30px, 3.7vw, 48px)/1.05 var(--display); letter-spacing: -.028em; text-wrap: balance; }
h3 { font: 650 18px/1.3 var(--display); letter-spacing: -.01em; }
.section-lead { max-width: 38em; margin-top: 20px; font-size: clamp(17px, 1.35vw, 19px); color: var(--soft); }
.fineprint { margin-top: 14px; font-size: 14px; line-height: 1.5; color: var(--muted); }

/* model */

.pillars { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: clamp(20px, 3vw, 40px); margin-top: clamp(36px, 5vw, 60px); }
.pillar { padding-top: 18px; border-top: 2px solid var(--ink); }
.pillar p { margin-top: 10px; font-size: 16px; color: var(--soft); }

.spec { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); margin-top: clamp(36px, 5vw, 60px); border: 1px solid var(--line); border-radius: var(--radius); background: var(--card); overflow: hidden; }
.spec > div { padding: 18px 20px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.spec > div:nth-child(3n) { border-right: 0; }
.spec > div:nth-last-child(-n + 3) { border-bottom: 0; }
.spec dt { font: 500 11.5px/1.4 var(--mono); letter-spacing: .09em; text-transform: uppercase; color: var(--muted); }
.spec dd { margin-top: 6px; font-weight: 600; font-size: 16px; line-height: 1.35; }

/* workflows */

.wf { margin-top: clamp(32px, 4vw, 48px); padding: 22px; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); }
.wf-row { display: grid; grid-template-columns: minmax(0, 1fr) 34px minmax(0, 1.1fr) 34px minmax(0, 1fr); align-items: center; }
.wf-step { display: grid; gap: 6px; padding: 16px; border: 1px solid var(--line-strong); border-radius: 10px; background: var(--paper); }
.wf-step strong { font-size: 16px; line-height: 1.3; }
.wf-kind { font: 500 11px/1.4 var(--mono); letter-spacing: .09em; text-transform: uppercase; color: var(--muted); }
.wf-text { font-size: 14px; line-height: 1.45; color: var(--muted); }
.wf-decide { border-color: var(--ink); box-shadow: 4px 4px 0 var(--accent); }
.wf-decide .wf-kind { color: var(--accent-text); }
.wf-arrow { position: relative; height: 2px; margin-inline: 5px; background: var(--line-strong); }
.wf-arrow::after { content: ""; position: absolute; right: -1px; top: -4px; width: 8px; height: 8px; border-top: 2px solid var(--line-strong); border-right: 2px solid var(--line-strong); transform: rotate(45deg); }
.wf-branches { display: grid; gap: 8px; }
.wf-branches li { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 2px 10px; align-items: baseline; padding: 10px 14px; border: 1px solid var(--line); border-radius: 10px; font-size: 15px; color: var(--muted); }
.wf-branches strong { font-weight: 500; }
.wf-pct { font: 500 13px/1 var(--mono); font-variant-numeric: tabular-nums; }
.wf-branches .is-taken { border-color: var(--accent); background: var(--accent-soft); color: var(--ink); }
.wf-branches .is-taken strong { font-weight: 650; }
.wf-next { grid-column: 1 / -1; font-size: 13.5px; color: var(--soft); }
.wf-next::before { content: "\2192\00a0"; color: var(--accent-text); }
.wf figcaption { margin-top: 18px; font: 400 12px/1.4 var(--mono); color: var(--muted); }

.channels { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: clamp(20px, 3vw, 40px); margin-top: clamp(32px, 4vw, 48px); }
.channels li { padding-top: 16px; border-top: 1px solid var(--line-strong); }
.channel-when { margin-bottom: 8px; font: 500 12px/1.4 var(--mono); letter-spacing: .09em; text-transform: uppercase; color: var(--accent-text); }
.channels li p:last-child { margin-top: 8px; font-size: 16px; color: var(--soft); }
.pricing-note { margin-top: clamp(28px, 4vw, 40px); padding: 18px 22px; border: 1px solid var(--line); border-left: 3px solid var(--accent); border-radius: var(--radius); background: var(--card); font-size: 16.5px; color: var(--soft); }
.pricing-note strong { color: var(--ink); }

/* request */

.flow { display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(0, .75fr); gap: 16px; margin-top: clamp(32px, 4vw, 48px); align-items: start; }
.code { background: var(--code-bg); color: var(--code-ink); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.code figcaption { display: flex; align-items: center; justify-content: space-between; padding: 12px 18px; border-bottom: 1px solid rgba(236, 232, 222, .12); font: 500 12px/1 var(--mono); letter-spacing: .09em; text-transform: uppercase; color: var(--code-dim); }
.tag { padding: 4px 7px; border: 1px solid rgba(236, 232, 222, .22); border-radius: 4px; font-size: 10.5px; }
.code pre { padding: 18px; overflow-x: auto; font: 400 13px/1.65 var(--mono); tab-size: 2; }
.code .k { color: var(--code-key); }
.code .s { color: var(--code-str); }
.code .n { color: var(--code-num); }

.steps { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: clamp(20px, 3vw, 40px); margin-top: clamp(36px, 5vw, 56px); counter-reset: step; }
.steps li { counter-increment: step; padding-top: 16px; border-top: 1px solid var(--line-strong); }
.steps h3::before { content: counter(step) "\00a0\00a0"; font: 500 13px/1 var(--mono); color: var(--accent-text); }
.steps p { margin-top: 8px; font-size: 16px; color: var(--soft); }

/* uses */

.uses { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; margin-top: clamp(32px, 4vw, 48px); }
.use { display: flex; flex-direction: column; padding: 22px; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); }
.use p { margin-top: 8px; font-size: 15.5px; color: var(--soft); }
.use .use-score { margin-top: auto; padding-top: 18px; font: 500 12.5px/1.5 var(--mono); color: var(--muted); }
.use-score strong { font: 650 22px/1 var(--display); letter-spacing: -.02em; color: var(--ink); }
.use-score .of { color: var(--muted); }
.use-score .trained-mark { margin-left: 7px; }

.limits { margin-top: 14px; padding: 22px; border: 1px dashed var(--line-strong); border-radius: var(--radius); }
.limits p { max-width: 46em; margin-top: 8px; font-size: 15.5px; color: var(--soft); }
.limits .limits-list { font: 400 13px/1.6 var(--mono); color: var(--muted); }
.limits .limits-list:empty { display: none; }

/* results */

.tiles { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; margin-top: clamp(32px, 4vw, 48px); }
.tile { padding: 26px 24px 24px; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); }
.tile-number { font: 650 clamp(52px, 6.4vw, 84px)/.95 var(--display); letter-spacing: -.045em; font-variant-numeric: tabular-nums; }
.tile-number small { margin-left: 4px; font-size: .36em; font-weight: 500; letter-spacing: 0; color: var(--muted); }
.tile-label { margin-top: 14px; font-weight: 650; font-size: 17px; }
.tile-sub { margin-top: 6px; font-size: 14.5px; line-height: 1.5; color: var(--muted); }

.bench-head { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 14px 24px; margin-top: clamp(40px, 5vw, 64px); }
.filters { display: flex; flex-wrap: wrap; gap: 6px; }
.chip { padding: 7px 12px; border: 1px solid var(--line-strong); border-radius: 999px; background: transparent; color: var(--soft); font: 500 13px/1 var(--sans); cursor: pointer; }
.chip:hover { border-color: var(--ink); color: var(--ink); }
.chip[aria-pressed="true"] { background: var(--ink); border-color: var(--ink); color: var(--paper); }

.trained-mark { display: inline-block; width: 8px; height: 8px; margin-inline: 2px; border: 2px solid var(--accent); border-radius: 50%; vertical-align: 0; }

.bench { margin-top: 16px; border-top: 1px solid var(--line); }
.bench li { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 6fr) 44px; gap: 6px 20px; align-items: center; padding-block: 12px; border-bottom: 1px solid var(--line); }
.bench-name { font-weight: 600; font-size: 15.5px; }
.bench-name .trained-mark { margin-left: 7px; }
.bench-asks { display: block; margin-top: 1px; font-weight: 400; font-size: 14px; line-height: 1.4; color: var(--muted); }
.bench-bar { height: 8px; border-radius: 4px; background: var(--line); overflow: hidden; }
.bench-bar i { display: block; height: 100%; border-radius: 4px; background: var(--ink); }
.bench-value { text-align: right; font: 500 14px/1 var(--mono); font-variant-numeric: tabular-nums; }
.bench li.is-zero .bench-value { color: var(--muted); }

.reading { margin-top: clamp(36px, 5vw, 56px); padding: 24px; background: var(--card); border: 1px solid var(--line); border-left: 3px solid var(--accent); border-radius: var(--radius); }
.reading ul { display: grid; gap: 10px; margin-top: 12px; }
.reading li { position: relative; padding-left: 20px; font-size: 15.5px; color: var(--soft); }
.reading li::before { content: ""; position: absolute; left: 2px; top: .62em; width: 7px; height: 2px; background: var(--muted); }
.reading li:empty { display: none; }

/* comparison */

.table-scroll { margin-top: clamp(28px, 4vw, 40px); overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius); background: var(--card); }
.compare { width: 100%; min-width: 620px; border-collapse: collapse; font-size: 15.5px; }
.compare th, .compare td { padding: 13px 18px; text-align: left; border-bottom: 1px solid var(--line); white-space: nowrap; }
.compare thead th { font: 500 11.5px/1.4 var(--mono); letter-spacing: .09em; text-transform: uppercase; color: var(--muted); }
.compare tbody tr:last-child th, .compare tbody tr:last-child td { border-bottom: 0; }
.compare tbody th { font-weight: 600; }
.compare .num { text-align: right; font-family: var(--mono); font-variant-numeric: tabular-nums; }
.compare .dim { color: var(--muted); }
.compare .sub { display: block; font-weight: 400; font-size: 13px; color: var(--muted); white-space: normal; }
.compare tr.is-ours th, .compare tr.is-ours td { background: var(--accent-soft); }
.compare tr.is-ours th { box-shadow: inset 3px 0 0 var(--accent); }

/* early access */

.access { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: clamp(28px, 5vw, 64px); align-items: start; }
.form { display: grid; gap: 18px; padding: 24px; background: var(--card); border: 1px solid var(--line-strong); border-radius: 16px; box-shadow: var(--shadow); }
.form-row { display: grid; gap: 7px; }
.form label { font-weight: 600; font-size: 15px; }
.optional { margin-left: 6px; font: 400 12px/1 var(--mono); color: var(--muted); }
.form input, .form textarea, .form select { width: 100%; padding: 13px 14px; border: 1px solid var(--line-strong); border-radius: 10px; background: var(--paper); color: var(--ink); font: 400 16px/1.4 var(--sans); }
.form textarea { resize: vertical; min-height: 92px; }
.form input::placeholder, .form textarea::placeholder { color: var(--muted); opacity: .8; }
.form input:focus-visible, .form textarea:focus-visible, .form select:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; border-color: transparent; }
.form input[aria-invalid="true"] { border-color: var(--accent); }
.form-where { margin: 0; padding: 0; border: 0; min-width: 0; }
.form-where legend { padding: 0; margin-bottom: 9px; font-weight: 600; font-size: 15px; }
.checks { display: flex; flex-wrap: wrap; gap: 8px; }
.checks label { position: relative; font-weight: 500; font-size: 14.5px; cursor: pointer; }
.checks input { position: absolute; inset: 0; width: 100%; height: 100%; margin: 0; padding: 0; opacity: 0; cursor: pointer; }
.checks span { display: block; padding: 10px 14px; border: 1px solid var(--line-strong); border-radius: 999px; background: var(--paper); color: var(--soft); }
.checks input:checked + span { background: var(--ink); border-color: var(--ink); color: var(--paper); }
.checks input:focus-visible + span { outline: 2px solid var(--accent); outline-offset: 2px; }
.form-trap { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.form .btn { width: 100%; }
.form .fineprint { margin-top: 0; }
.form-status { font-size: 15px; line-height: 1.45; color: var(--soft); }
.form-status:empty { display: none; }
.form-status.is-error { color: var(--accent-text); }
.form-status.is-done { font-weight: 600; color: var(--ink); }

/* footer */

.foot { border-top: 1px solid var(--line); padding-block: 32px 48px; }
.foot-row { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px 40px; font-size: 14px; color: var(--muted); }
.foot-row strong { color: var(--ink); letter-spacing: .04em; }
.foot-note { max-width: 46em; }

/* ---------- smaller screens ---------- */

@media (max-width: 980px) {
  .hero-grid { grid-template-columns: minmax(0, 1fr); }
  .frq-letters { font-size: clamp(40px, 11vw, 86px); }
  .section-grid { grid-template-columns: minmax(0, 1fr); gap: 18px; }
  .section-num { position: static; }
  .uses { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .access { grid-template-columns: minmax(0, 1fr); }
}

@media (max-width: 860px) {
  .wf-row { grid-template-columns: minmax(0, 1fr); }
  .wf-arrow { width: 2px; height: 26px; margin: 5px auto; }
  .wf-arrow::after { right: -4px; top: auto; bottom: -1px; transform: rotate(135deg); }
}

@media (max-width: 720px) {
  body { font-size: 16px; }
  .nav { display: none; }
  .top-row { justify-content: space-between; }
  .pillars, .steps, .flow, .tiles, .channels { grid-template-columns: minmax(0, 1fr); }
  .spec { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .spec > div:nth-child(3n) { border-right: 1px solid var(--line); }
  .spec > div:nth-child(2n) { border-right: 0; }
  .spec > div:nth-last-child(-n + 3) { border-bottom: 1px solid var(--line); }
  .spec > div:nth-last-child(-n + 2) { border-bottom: 0; }
  .field { grid-template-columns: minmax(0, 1fr); gap: 6px; }
  .tab, .chip { padding-block: 12px; }
  .frq-caption { min-height: 6em; }
  .frq-dot { width: 34px; height: 34px; }
  .bench li { grid-template-columns: minmax(0, 1fr) 44px; }
  .bench-bar { grid-column: 1 / -1; grid-row: 2; }
}

@media (max-width: 520px) {
  .uses { grid-template-columns: minmax(0, 1fr); }
  .hero-actions .btn { width: 100%; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; animation: none !important; }
}