/*
 * styles.css
 * CodeX website
 *
 * The app icon's blue as a drawing sheet: a blueprint grid behind the header
 * and hero, paper below it, section citations in the monospace face.
 * System fonts only, so the site makes no third-party requests.
 */

:root {
    --bg: #F5F3EE;
    --surface: #FFFFFF;
    --ink: #14202B;
    --muted: #55626F;
    --line: #DAD6CC;
    --brand: #1F4E79;
    --brand-deep: #163A5C;
    --link: #1F4E79;
    --accent: #F0B429;
    --accent-ink: #2A1F00;
    --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
    --grid: linear-gradient(rgba(255, 255, 255, .07) 1px, transparent 1px), linear-gradient(90deg, rgba(255, 255, 255, .07) 1px, transparent 1px),
        linear-gradient(rgba(255, 255, 255, .05) 1px, transparent 1px), linear-gradient(90deg, rgba(255, 255, 255, .05) 1px, transparent 1px);
    --gutter: clamp(16px, 5vw, 48px);
    --measure: 1120px;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg: #0D151D;
        --surface: #15202B;
        --ink: #E7EDF3;
        --muted: #9BA9B7;
        --line: #283746;
        --link: #9EC5FF;
    }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 17px/1.6 var(--sans); }
h1, h2, h3 { line-height: 1.15; letter-spacing: -.02em; margin: 0; text-wrap: balance; }
p { margin: 0 0 1em; }
a { color: var(--link); text-underline-offset: 3px; }
a:focus-visible, button:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; border-radius: 4px; }
.skip { position: absolute; left: -999px; }
.skip:focus { left: 16px; top: 12px; z-index: 5; background: var(--accent); color: var(--accent-ink); padding: 8px 12px; border-radius: 6px; }
.cite { font-family: var(--mono); font-size: .92em; font-weight: 600; white-space: nowrap; }

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

.top { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 14px var(--gutter); background: var(--brand); color: #fff; }
.brand { display: inline-flex; align-items: center; gap: 10px; color: inherit; text-decoration: none; font-weight: 700; font-size: 1.1rem; letter-spacing: -.01em; }
.mark { width: 30px; height: 30px; border-radius: 7px; box-shadow: 0 0 0 1px rgba(255, 255, 255, .35); flex: none; }
.top nav { display: flex; gap: clamp(12px, 3vw, 28px); font-size: .95rem; }
.top nav a { color: #fff; text-decoration: none; opacity: .85; white-space: nowrap; }
.top nav a:hover, .top nav a[aria-current] { opacity: 1; text-decoration: underline; }
@media (max-width: 480px) { .top nav { font-size: .9rem; } .top nav a:first-child { display: none; } }   /* the hero links to it */

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

.hero { display: grid; grid-template-columns: minmax(0, 1fr); gap: 40px; padding: clamp(32px, 7vw, 84px) var(--gutter) clamp(40px, 7vw, 88px); color: #fff;
    background: var(--grid), var(--brand); background-size: 160px 160px, 160px 160px, 32px 32px, 32px 32px; }
.hero > * { max-width: 620px; width: 100%; margin: 0 auto; }
.eyebrow { font: 600 .8rem/1.4 var(--mono); letter-spacing: .08em; text-transform: uppercase; opacity: .8; margin-bottom: 14px; }
.hero h1 { font-size: clamp(2.5rem, 7.2vw, 4.4rem); font-weight: 800; letter-spacing: -.035em; line-height: 1.02; }
.lede { font-size: clamp(1.05rem, 2.2vw, 1.25rem); line-height: 1.5; margin: 22px 0 28px; max-width: 34em; opacity: .94; }
.cta { display: flex; flex-wrap: wrap; align-items: center; gap: 12px 22px; margin: 0 0 14px; }
.button { display: inline-block; background: var(--accent); color: var(--accent-ink); font-weight: 700; text-decoration: none; padding: 13px 22px; border-radius: 10px; }
.button:hover { filter: brightness(1.06); }
.quiet { color: #fff; }
.status { font-size: .9rem; opacity: .75; margin: 0; }

@media (min-width: 980px) {
    .hero { grid-template-columns: minmax(0, 1fr) minmax(0, 520px); align-items: center; gap: 56px; }
    .hero > * { max-width: none; margin: 0; }
    .hero-text { justify-self: end; max-width: 560px; }
    .demo { justify-self: start; }
}

/* ---------- the example ---------- */

.demo { background: var(--surface); color: var(--ink); border-radius: 16px; padding: 14px; box-shadow: 0 24px 60px -20px rgba(4, 16, 28, .7), 0 0 0 1px rgba(255, 255, 255, .12); }
.tabs { display: flex; gap: 4px; padding: 4px; margin-bottom: 14px; background: var(--bg); border-radius: 11px; overflow-x: auto; scrollbar-width: none; }
.tabs::-webkit-scrollbar { display: none; }
.tabs button { flex: 1 0 auto; font: 600 .86rem/1 var(--sans); color: var(--muted); background: none; border: 0; border-radius: 8px; padding: 9px 11px; cursor: pointer; white-space: nowrap; }
.tabs button[aria-selected=true] { background: var(--surface); color: var(--ink); box-shadow: 0 1px 3px rgba(0, 0, 0, .18); }
.panel { padding: 0 6px 4px; }
.ask-row { display: flex; align-items: center; justify-content: space-between; gap: 10px; font-size: .8rem; color: var(--muted); }
.mode { font-weight: 600; color: var(--ink); border: 1px solid var(--line); border-radius: 999px; padding: 3px 10px; }
.mode::after { content: " ▾"; color: var(--muted); }
.where { font-family: var(--mono); text-align: right; }
.question { font-size: 1.12rem; font-weight: 650; line-height: 1.3; margin: 12px 0 14px; }
.hit { border: 1px solid var(--line); border-left: 4px solid var(--brand); border-radius: 10px; padding: 12px 14px; }
.hit h3 { font-size: .98rem; line-height: 1.35; letter-spacing: 0; font-weight: 650; }
.hit .cite { color: var(--link); margin-right: 4px; }
.hit p { font-size: .9rem; line-height: 1.5; color: var(--muted); margin: 8px 0 10px; display: -webkit-box; -webkit-box-orient: vertical; -webkit-line-clamp: 6; line-clamp: 6; overflow: hidden; }
.hit a { font-size: .86rem; font-weight: 600; }
.after { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 8px; margin-top: 12px; font-size: .82rem; color: var(--muted); }
.chips { display: flex; gap: 6px; }
.chips i { font-style: normal; font-weight: 600; color: var(--ink); border: 1px solid var(--line); border-radius: 8px; padding: 4px 10px; }
.chips .go { background: var(--brand); border-color: var(--brand); color: #fff; }

/* ---------- facts ---------- */

.facts { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); max-width: var(--measure); margin: 0 auto; padding: 0 var(--gutter); }
.facts div { display: flex; align-items: baseline; gap: 14px; padding: 26px 0; border-bottom: 1px solid var(--line); }
.facts b { font: 700 2.3rem/1 var(--mono); letter-spacing: -.04em; color: var(--link); min-width: 2.2ch; }
.facts span { font-size: .95rem; line-height: 1.35; color: var(--muted); max-width: 20ch; }
@media (min-width: 740px) { .facts div { border-bottom: 0; padding: 34px 0; } .facts { border-bottom: 1px solid var(--line); } }

/* ---------- bands ---------- */

.band { padding: clamp(48px, 8vw, 96px) var(--gutter); }
.band > * { max-width: var(--measure); margin-left: auto; margin-right: auto; }
.band h2 { font-size: clamp(1.7rem, 4vw, 2.5rem); font-weight: 800; letter-spacing: -.03em; }
.intro { color: var(--muted); font-size: 1.08rem; margin-top: 12px; max-width: none; }
.band > .intro { max-width: var(--measure); }
.alt { background: var(--surface); border-block: 1px solid var(--line); }

.modes, .pros, .features { display: grid; gap: 18px; margin-top: 34px; }
.modes { grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); counter-reset: mode; }
.modes article { background: var(--surface); border: 1px solid var(--line); border-top: 4px solid var(--brand); border-radius: 12px; padding: 20px 22px 8px; }
.modes h3 { font-size: 1.3rem; margin-bottom: 10px; }
.tag { font: 600 .74rem/1.4 var(--mono); letter-spacing: .06em; text-transform: uppercase; color: var(--muted); margin-bottom: 10px; }
.modes p:not(.tag) { color: var(--muted); font-size: .98rem; }
.modes .cite { color: var(--link); }

.pros { grid-template-columns: repeat(auto-fit, minmax(270px, 1fr)); }
.pro { display: flex; flex-direction: column; background: var(--bg); border: 1px solid var(--line); border-radius: 12px; padding: 20px 22px 6px; }
.pro h3 { font-size: 1.3rem; }
.lib { font: 600 .82rem/1.5 var(--mono); color: var(--link); margin: 6px 0 12px; }
.lib small { font-weight: 400; color: var(--muted); font-size: 1em; }
.lib em { font-style: normal; font-weight: 400; color: var(--muted); }
.pro p { font-size: .96rem; }
.pro ul { list-style: none; margin: 2px 0 14px; padding: 0; border-top: 1px solid var(--line); }
.pro li { font-size: .93rem; line-height: 1.4; padding: 9px 0; border-bottom: 1px solid var(--line); }
.pro li::before { content: "? "; font: 700 1em var(--mono); color: var(--link); }
.basis { margin-top: auto; color: var(--muted); font-size: .86rem !important; }
.planned { border-style: dashed; }
.planned .lib { color: var(--muted); }

.features { grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 30px 44px; }
.features h3 { font-size: 1.12rem; padding-top: 14px; border-top: 2px solid var(--ink); margin-bottom: 8px; }
.features p { color: var(--muted); font-size: .98rem; margin: 0; }

.plain { padding-top: 0; }
.limits { border: 1px solid var(--line); border-left: 6px solid var(--accent); border-radius: 12px; background: var(--surface); padding: clamp(22px, 4vw, 40px); }
.limits h2 { font-size: clamp(1.4rem, 3vw, 1.9rem); margin-bottom: 14px; }
.limits p { max-width: 68ch; }
.limits p:last-child { margin-bottom: 0; }

.close { text-align: center; color: #fff; background: var(--grid), var(--brand-deep); background-size: 160px 160px, 160px 160px, 32px 32px, 32px 32px; }
.close p { max-width: 46ch; margin: 14px auto 24px; opacity: .9; }
.close .cta { justify-content: center; margin-bottom: 0; }

/* ---------- documents ---------- */

.legal { max-width: 760px; margin: 0 auto; padding: clamp(36px, 7vw, 72px) var(--gutter) 72px; }
.legal .eyebrow { color: var(--muted); opacity: 1; }
.legal h1 { font-size: clamp(1.9rem, 5vw, 2.8rem); font-weight: 800; letter-spacing: -.03em; }
.summary { font-size: 1.14rem; line-height: 1.55; margin: 20px 0 26px; padding: 18px 20px; background: var(--surface); border: 1px solid var(--line); border-left: 6px solid var(--brand); border-radius: 10px; }
.note { color: var(--muted); font-size: .95rem; }
.legal section { border-top: 1px solid var(--line); padding-top: 24px; margin-top: 26px; }
.legal h2 { font-size: 1.2rem; letter-spacing: -.01em; margin-bottom: 12px; }
.legal section p { overflow-wrap: anywhere; }

/* ---------- footer ---------- */

.foot { padding: 34px var(--gutter) 44px; border-top: 1px solid var(--line); font-size: .86rem; color: var(--muted); }
.foot > * { max-width: var(--measure); margin-left: auto; margin-right: auto; }
.foot-row { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 14px 28px; margin-bottom: 18px; color: var(--ink); }
.foot nav { display: flex; flex-wrap: wrap; gap: 8px 22px; font-size: .95rem; }
.foot p { margin-bottom: .6em; max-width: 90ch; }
.foot > p { margin-left: auto; margin-right: auto; max-width: var(--measure); }

@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }