/* CsAgent site. One stylesheet, no framework, no external requests. */

@font-face { font-family: "Bricolage Grotesque"; src: url("fonts/bricolage-grotesque-latin-wght-normal.woff2") format("woff2"); font-weight: 200 800; font-display: swap; }
@font-face { font-family: "Hanken Grotesk"; src: url("fonts/hanken-grotesk-latin-wght-normal.woff2") format("woff2"); font-weight: 100 900; font-display: swap; }
@font-face { font-family: "JetBrains Mono"; src: url("fonts/jetbrains-mono-latin-400-normal.woff2") format("woff2"); font-weight: 400; font-display: swap; }
@font-face { font-family: "JetBrains Mono"; src: url("fonts/jetbrains-mono-latin-700-normal.woff2") format("woff2"); font-weight: 700; font-display: swap; }

:root {
  --paper: #f3f5f8;
  --paper-2: #e9edf2;
  --text: #17212e;
  --muted: #526071;
  --line: #d0d8e2;
  --ink: #1e3a5f;          /* bleu de travail */
  --ink-text: #ffffff;
  --link: #1e3a5f;
  --gate: #f7c600;         /* safety yellow: used only where the agent stops and asks */
  --gate-ink: #231b00;
  --focus: #1f6feb;
  --term-bg: #0e1a29;
  --term-bar: #14253a;
  --term-text: #d5e1ef;
  --term-dim: #7f94ab;
  --term-ok: #7bd3a0;
  --term-err: #f28b82;
  --term-call: #8fc1f2;
  --code-bg: #e7ecf2;
  --font-display: "Bricolage Grotesque", "Hanken Grotesk", system-ui, sans-serif;
  --font-body: "Hanken Grotesk", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, "Cascadia Code", Consolas, monospace;
  --gutter: 16px;
  --measure: 62ch;
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #0c1622;
    --paper-2: #122033;
    --text: #e3ebf4;
    --muted: #9badc0;
    --line: #243348;
    --ink: #a9c8ee;
    --ink-text: #0c1622;
    --link: #a9c8ee;
    --term-bg: #07101a;
    --term-bar: #0e1c2d;
    --code-bg: #122033;
  }
}

@media (min-width: 720px) { :root { --gutter: 32px; } }

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 72px; -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  background: var(--paper);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.6;
  text-rendering: optimizeLegibility;
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--link); text-underline-offset: 0.18em; text-decoration-thickness: 1px; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; border-radius: 3px; }

.wrap { width: min(1120px, 100% - 2 * var(--gutter)); margin-inline: auto; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.skip { position: absolute; left: var(--gutter); top: -60px; background: var(--ink); color: var(--ink-text); padding: 8px 14px; border-radius: 6px; z-index: 20; }
.skip:focus { top: 8px; }

/* ---------- type ---------- */
h1, h2, h3 { font-family: var(--font-display); font-weight: 700; letter-spacing: -0.02em; line-height: 1.08; margin: 0; text-wrap: balance; }
h1 { font-size: clamp(2.15rem, 4.4vw, 3.45rem); line-height: 1.05; letter-spacing: -0.028em; }
h2 { font-size: clamp(1.85rem, 3.4vw, 2.7rem); }
h3 { font-size: clamp(1.25rem, 2vw, 1.55rem); letter-spacing: -0.012em; line-height: 1.2; }
p { margin: 0 0 1em; max-width: var(--measure); }
.lede { font-size: 1.2rem; line-height: 1.55; color: var(--muted); max-width: 56ch; }
code, kbd, pre { font-family: var(--font-mono); font-size: 0.86em; }
code { background: var(--code-bg); padding: 0.1em 0.38em; border-radius: 4px; white-space: nowrap; }
code.w, .pre code { white-space: normal; }
.muted { color: var(--muted); }

/* ---------- header ---------- */
.top { position: sticky; top: 0; z-index: 10; background: color-mix(in srgb, var(--paper) 88%, transparent); backdrop-filter: blur(8px); border-bottom: 1px solid var(--line); }
.top .wrap { display: flex; align-items: center; gap: 20px; min-height: 56px; }
.brand { font-family: var(--font-display); font-weight: 800; font-size: 1.25rem; letter-spacing: -0.02em; color: var(--text); text-decoration: none; display: inline-flex; align-items: center; gap: 9px; flex: none; }
.brand img { width: 26px; height: 26px; }
.top nav { display: flex; gap: 4px; overflow-x: auto; scrollbar-width: none; flex: 1; min-width: 0; }
.top nav::-webkit-scrollbar { display: none; }
.top nav a { color: var(--muted); text-decoration: none; padding: 8px 10px; border-radius: 6px; font-size: 0.95rem; white-space: nowrap; }
.top nav a:hover { color: var(--text); background: var(--paper-2); }
.top .gh { flex: none; font-size: 0.92rem; padding: 7px 12px; }

/* ---------- buttons ---------- */
.btn { display: inline-flex; align-items: center; gap: 8px; font: inherit; font-weight: 650; font-size: 1rem; padding: 12px 20px; border-radius: 8px; border: 2px solid var(--ink); background: var(--ink); color: var(--ink-text); text-decoration: none; cursor: pointer; line-height: 1.2; }
.btn:hover { filter: brightness(1.08); text-decoration: none; }
.btn.ghost { background: transparent; color: var(--ink); }
.btn.ghost:hover { background: var(--paper-2); filter: none; }
.btn.small { padding: 7px 12px; font-size: 0.92rem; border-width: 1.5px; }

/* ---------- hero ---------- */
.hero { padding: 48px 0 40px; }
.hero .wrap { display: grid; gap: 40px; align-items: center; }
@media (min-width: 980px) { .hero .wrap { grid-template-columns: minmax(0, 5fr) minmax(0, 6fr); gap: 56px; } .hero { padding: 72px 0 56px; } }
.hero h1 { margin-bottom: 22px; }
.hero .lede { margin-bottom: 28px; }
.cta { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 22px; }
.fine { font-size: 0.95rem; color: var(--muted); max-width: 48ch; margin: 0; }

/* ---------- terminal ---------- */
.term { background: var(--term-bg); color: var(--term-text); border-radius: 12px; border: 1px solid color-mix(in srgb, var(--ink) 35%, transparent); overflow: hidden; box-shadow: 0 24px 48px -28px rgba(8, 20, 38, 0.55); }
.term-bar { background: var(--term-bar); padding: 9px 14px; font-family: var(--font-mono); font-size: 0.78rem; color: var(--term-dim); display: flex; justify-content: space-between; gap: 12px; }
.term-body { margin: 0; padding: 16px 16px 8px; font-family: var(--font-mono); font-size: 0.78rem; line-height: 1.55; height: 430px; overflow: auto; white-space: pre-wrap; word-break: break-word; tab-size: 4; scrollbar-width: thin; }
@media (min-width: 720px) { .term-body { font-size: 0.82rem; height: 470px; } }
.term-body .d { color: var(--term-dim); }
.term-body .u { color: #ffffff; font-weight: 700; }
.term-body .c { color: var(--term-call); }
.term-body .ok { color: var(--term-ok); }
.term-body .er { color: var(--term-err); }
.term-body .q { color: var(--gate); font-weight: 700; }
.caret::after { content: "\2588"; color: var(--term-dim); animation: blink 1.05s steps(1) infinite; margin-left: 1px; }
@keyframes blink { 50% { opacity: 0; } }
@media (prefers-reduced-motion: reduce) { .caret::after { animation: none; } }

.gate-bar { background: var(--gate); color: var(--gate-ink); padding: 12px 16px; display: none; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
.gate-bar.on { display: flex; }
.gate-bar.waiting { animation: gate-pulse 1.8s ease-in-out 3; }
@keyframes gate-pulse { 0%, 100% { box-shadow: inset 0 0 0 0 rgba(35, 27, 0, 0); } 50% { box-shadow: inset 0 0 0 3px rgba(35, 27, 0, 0.45); } }
@media (prefers-reduced-motion: reduce) { .gate-bar.waiting { animation: none; } }
.gate-bar p { margin: 0; font-weight: 650; font-size: 0.95rem; max-width: none; }
.gate-bar .opts { display: flex; gap: 8px; }
.gate-btn { font: inherit; font-weight: 700; font-size: 0.95rem; padding: 8px 16px; border-radius: 6px; border: 2px solid var(--gate-ink); cursor: pointer; background: var(--gate-ink); color: var(--gate); line-height: 1.2; }
.gate-btn.no { background: transparent; color: var(--gate-ink); }
.gate-btn:focus-visible { outline-color: #ffffff; outline-offset: 2px; }
.replay { display: none; background: var(--term-bar); padding: 10px 16px; align-items: center; justify-content: space-between; gap: 12px; font-size: 0.9rem; color: var(--term-dim); }
.replay.on { display: flex; }
.replay button { font: inherit; font-weight: 650; background: transparent; color: var(--term-text); border: 1.5px solid var(--term-dim); padding: 6px 12px; border-radius: 6px; cursor: pointer; }
.replay button:hover { border-color: var(--term-text); }
.term-note { font-size: 0.88rem; color: var(--muted); margin: 14px 0 0; max-width: 60ch; }

/* ---------- sections ---------- */
section { padding: 72px 0; }
section + section { border-top: 1px solid var(--line); }
.sec-head { margin-bottom: 40px; display: grid; gap: 16px; }
.sec-head .lede { margin: 0; }

.glance { display: grid; gap: 0 40px; grid-template-columns: 1fr; }
@media (min-width: 720px) { .glance { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1000px) { .glance { grid-template-columns: repeat(4, 1fr); } }
.glance > div { border-top: 2px solid var(--ink); padding: 14px 0 28px; }
.glance > div.ask { border-top-color: var(--gate); }
.glance h3 { font-size: 1.2rem; margin-bottom: 8px; }
.glance p { color: var(--muted); font-size: 0.98rem; margin: 0; }
.glance a { color: inherit; text-decoration: none; }
.glance a:hover h3 { text-decoration: underline; text-decoration-thickness: 2px; }

/* flow diagram (html, so it reflows on phones) */
.flow { list-style: none; margin: 0; padding: 0; display: grid; gap: 0; grid-template-columns: 1fr; }
@media (min-width: 900px) { .flow { grid-template-columns: 1fr 1.25fr 1.7fr 1fr; } }
.flow > li { position: relative; padding: 20px 20px 22px; background: var(--paper-2); }
.flow > li + li { margin-top: 28px; }
@media (min-width: 900px) { .flow > li + li { margin-top: 0; margin-left: 28px; } }
.flow > li + li::before { content: ""; position: absolute; background: var(--ink); }
.flow > li + li::before { left: 24px; top: -28px; width: 2px; height: 28px; }
.flow > li + li::after { content: ""; position: absolute; left: 19px; top: -9px; border: 6px solid transparent; border-top: 8px solid var(--ink); border-bottom: 0; }
@media (min-width: 900px) {
  .flow > li + li::before { left: -28px; top: 30px; width: 28px; height: 2px; }
  .flow > li + li::after { left: -10px; top: 24px; border: 6px solid transparent; border-left: 8px solid var(--ink); border-right: 0; }
}
.flow > li.gate { background: var(--gate); color: var(--gate-ink); }
.flow h3 { font-size: 1.1rem; margin-bottom: 6px; }
.flow p { font-size: 0.95rem; margin: 0; max-width: none; }
.flow ul { margin: 8px 0 0; padding-left: 1.1em; font-size: 0.95rem; }
.flow > li.gate p, .flow > li.gate ul { color: var(--gate-ink); }
.loop { margin-top: 14px; border-left: 2px solid var(--ink); padding: 4px 0 4px 16px; color: var(--muted); font-size: 0.97rem; max-width: 80ch; }

/* two-column */
.split { display: grid; gap: 28px 56px; align-items: start; }
@media (min-width: 900px) { .split { grid-template-columns: repeat(2, minmax(0, 1fr)); } .split.wide-left { grid-template-columns: 7fr 5fr; } .split.wide-right { grid-template-columns: 5fr 7fr; } }
.block { margin-top: 64px; }
.block > h3 { margin-bottom: 0; }
.split h3 + *, .block h3 + *, .start-steps h3 + * { margin-top: 12px; }

figure { margin: 0; }
figure img { border-radius: 10px; border: 1px solid var(--line); background: var(--term-bg); }
figcaption { font-size: 0.92rem; color: var(--muted); margin-top: 10px; max-width: 60ch; }
.shots { display: grid; gap: 28px; }
@media (min-width: 900px) { .shots { grid-template-columns: repeat(2, minmax(0, 1fr)); } }

.cmd { font-family: var(--font-mono); font-size: 0.9rem; background: var(--term-bg); color: var(--term-text); padding: 4px 10px; border-radius: 6px; display: inline-block; }

/* prompts list */
.prompts { margin: 0; padding: 0; list-style: none; }
.prompts li { display: grid; gap: 6px 32px; padding: 18px 0; border-top: 1px solid var(--line); }
.prompts li:last-child { border-bottom: 1px solid var(--line); }
@media (min-width: 820px) { .prompts li { grid-template-columns: 5fr 6fr; } }
.prompts q { font-family: var(--font-display); font-weight: 600; font-size: 1.2rem; line-height: 1.3; letter-spacing: -0.01em; quotes: "\00AB\00A0" "\00A0\00BB"; }
.prompts span { color: var(--muted); font-size: 0.98rem; }

/* voice */
.chunks { display: flex; gap: 4px; align-items: flex-end; height: 56px; margin-bottom: 8px; }
.chunks i { flex: 1; background: var(--ink); border-radius: 2px; opacity: 0.88; }
.chunks-label { display: flex; justify-content: space-between; font-size: 0.85rem; color: var(--muted); margin-bottom: 20px; }
.outcome { display: grid; gap: 10px; grid-template-columns: 1fr 1fr; }
.outcome div { border: 1.5px solid var(--line); border-radius: 8px; padding: 12px 14px; font-size: 0.93rem; }
.outcome b { display: block; font-family: var(--font-display); font-size: 1.02rem; margin-bottom: 3px; }
.outcome span { color: var(--muted); }

/* memory visual */
.pre { background: var(--term-bg); color: var(--term-text); border-radius: 10px; padding: 16px 18px; font-family: var(--font-mono); font-size: 0.84rem; line-height: 1.65; overflow-x: auto; margin: 0; white-space: pre; }
.pre .d { color: var(--term-dim); }
.pre .c { color: var(--term-call); }
.pre .ok { color: var(--term-ok); }
.pre .er { color: var(--term-err); }
.pre .q { color: var(--gate); }
.pre-wrap { position: relative; }
.copy { position: absolute; top: 8px; right: 8px; font: inherit; font-size: 0.78rem; font-weight: 650; color: var(--term-text); background: var(--term-bar); border: 1px solid var(--term-dim); border-radius: 5px; padding: 3px 9px; cursor: pointer; opacity: 0.9; }
.copy:hover { opacity: 1; border-color: var(--term-text); }
.lists { display: grid; grid-template-columns: 1fr 1fr; gap: 0; border: 1px solid var(--line); border-radius: 10px; overflow: hidden; }
.lists div { padding: 14px 16px; border-bottom: 1px solid var(--line); }
.lists div:nth-child(odd) { border-right: 1px solid var(--line); }
.lists div:nth-last-child(-n+2) { border-bottom: 0; }
.lists b { display: block; font-family: var(--font-display); margin-bottom: 4px; }
.lists span { color: var(--muted); font-size: 0.93rem; line-height: 1.45; display: block; }

/* dials */
.dials { margin: 0; display: grid; gap: 0; }
.dials div { display: grid; gap: 4px 24px; padding: 14px 0; border-top: 1px solid var(--line); }
.dials div:last-child { border-bottom: 1px solid var(--line); }
@media (min-width: 720px) { .dials div { grid-template-columns: 190px 1fr; } }
.dials dt { font-family: var(--font-mono); font-size: 0.9rem; font-weight: 700; }
.dials dd { margin: 0; color: var(--muted); }

/* safety */
#safety { background: var(--paper-2); }
#safety .sec-head h2::before { content: ""; display: block; width: 72px; height: 10px; background: var(--gate); margin-bottom: 20px; border-radius: 2px; }
.layers { margin: 0; padding: 0; list-style: none; display: grid; gap: 0; }
.layers li { display: grid; gap: 4px 32px; padding: 20px 0 20px 22px; border-top: 1px solid var(--line); }
.layers li:last-child { border-bottom: 1px solid var(--line); }
@media (min-width: 820px) { .layers li { grid-template-columns: 230px 1fr; } }
.layers h3 { font-size: 1.2rem; }
.layers li.asks { background: linear-gradient(var(--gate), var(--gate)) left top / 8px 100% no-repeat; }
.layers p { margin: 0; color: var(--muted); max-width: 70ch; }
.layers p code { color: var(--text); }
.callout { margin-top: 36px; border: 2px solid var(--text); border-radius: 10px; padding: 20px 24px; max-width: 78ch; background: var(--paper); }
.callout h3 { margin-bottom: 8px; font-size: 1.2rem; }
.callout p:last-child { margin-bottom: 0; }

/* dev */
.events { width: 100%; border-collapse: collapse; font-size: 0.95rem; }
.events th, .events td { text-align: left; padding: 9px 12px 9px 0; border-top: 1px solid var(--line); vertical-align: top; }
.events th { font-family: var(--font-mono); font-weight: 700; font-size: 0.86rem; white-space: nowrap; }
.events td { color: var(--muted); }
.events tr:last-child th, .events tr:last-child td { border-bottom: 1px solid var(--line); }
.steps { list-style: none; margin: 0; padding: 0; counter-reset: s; display: grid; gap: 14px; }
.steps li { counter-increment: s; display: grid; grid-template-columns: 34px 1fr; gap: 12px; align-items: baseline; max-width: 70ch; }
.steps li::before { content: counter(s); font-family: var(--font-display); font-weight: 800; font-size: 1.1rem; width: 28px; height: 28px; border-radius: 50%; background: var(--ink); color: var(--ink-text); display: grid; place-items: center; align-self: start; margin-top: 1px; }
.catalog { display: grid; gap: 22px 40px; }
@media (min-width: 720px) { .catalog { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1000px) { .catalog { grid-template-columns: repeat(3, 1fr); } }
.catalog h3 { font-size: 1.05rem; margin-bottom: 8px; }
.chips { display: flex; flex-wrap: wrap; gap: 6px; margin: 0; padding: 0; list-style: none; }
.chips li { font-family: var(--font-mono); font-size: 0.78rem; padding: 3px 8px; border: 1px solid var(--line); border-radius: 5px; background: var(--paper); }
.chips li.ask { border-left: 5px solid var(--gate); }
.chips li.win::after { content: " (Windows)"; color: var(--muted); font-family: var(--font-body); font-size: 0.74rem; }
.legend { font-size: 0.9rem; color: var(--muted); margin-top: 18px; display: flex; align-items: center; gap: 8px; max-width: none; }
.legend i { display: inline-block; width: 5px; height: 16px; background: var(--gate); border-radius: 1px; }
.facts { margin: 0; padding: 0; list-style: none; display: grid; gap: 10px; max-width: 64ch; }
.facts li { padding-left: 18px; position: relative; }
.facts li::before { content: ""; position: absolute; left: 0; top: 0.7em; width: 8px; height: 2px; background: var(--ink); }

/* get started */
.tabs { display: flex; gap: 6px; margin-bottom: 14px; flex-wrap: wrap; }
.tabs button { font: inherit; font-weight: 650; font-size: 0.95rem; padding: 7px 14px; border-radius: 999px; border: 1.5px solid var(--line); background: transparent; color: var(--muted); cursor: pointer; }
.tabs button[aria-pressed="true"] { background: var(--ink); color: var(--ink-text); border-color: var(--ink); }
.start-steps { display: grid; gap: 32px; max-width: 760px; }
.start-steps h3 { font-size: 1.3rem; }
.start-steps p { max-width: 64ch; }

/* status */
.limits { margin: 0; padding: 0; list-style: none; display: grid; gap: 12px; max-width: 72ch; }
.limits li { padding: 12px 0 12px 0; border-top: 1px solid var(--line); }
.limits li:last-child { border-bottom: 1px solid var(--line); }

footer { padding: 48px 0 64px; border-top: 1px solid var(--line); color: var(--muted); font-size: 0.95rem; }
footer .wrap { display: grid; gap: 24px; }
@media (min-width: 820px) { footer .wrap { grid-template-columns: 1fr auto; align-items: end; } }
footer ul { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 6px 22px; }
footer p { margin: 0 0 6px; max-width: 60ch; }

/* grid children must be allowed to shrink, or wide code blocks stretch the page on phones */
.hero .wrap > *, .split > *, .shots > *, .catalog > *, .start-steps > * { min-width: 0; }
.pre-wrap { min-width: 0; max-width: 100%; }
.pre { max-width: 100%; }

.views { font-size: 0.88rem; margin-top: 14px; }
.views strong { color: var(--text); font-variant-numeric: tabular-nums; }