/* Foodlang site — light, warm, marketing-grade theme. */
:root {
  --bg: #ffffff;
  --bg-warm: #faf6f0;
  --bg-band: #f6f1e9;
  --ink: #20242a;
  --ink-soft: #3a4150;
  --muted: #6b7280;
  --accent: #e2542c;       /* tomato */
  --accent-dark: #c2401d;
  --accent-soft: #fbe9e1;
  --teal: #1f9b8a;
  --border: #ece7df;
  --border-strong: #ddd5c8;
  --code-bg: #1d2129;
  --code-ink: #e7e2d6;
  --radius: 14px;
  --shadow: 0 1px 2px rgba(20,20,20,.04), 0 8px 24px rgba(20,20,20,.06);
  --shadow-lift: 0 12px 34px rgba(40,30,20,.12);
  --max: 1120px;
  --font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font: 16px/1.65 var(--font);
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3, h4 { line-height: 1.18; color: var(--ink); letter-spacing: -.012em; }
code { font-family: var(--mono); font-size: .92em; }
:not(pre) > code {
  background: var(--accent-soft); color: var(--accent-dark);
  padding: .12em .42em; border-radius: 6px; font-size: .86em;
}

/* ---- Top bar ---- */
.topbar {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,.88); backdrop-filter: saturate(160%) blur(10px);
  border-bottom: 1px solid var(--border);
}
.topbar-inner {
  max-width: var(--max); margin: 0 auto; padding: .7rem 1.25rem;
  display: flex; align-items: center; gap: 1rem;
}
.brand { font-weight: 800; font-size: 1.18rem; color: var(--ink); letter-spacing: -.02em; }
.brand:hover { text-decoration: none; }
.brand-mark { margin-right: .15rem; }
.nav-links { margin-left: auto; display: flex; align-items: center; gap: 1.35rem; }
.nav-links a { color: var(--ink-soft); font-size: .95rem; font-weight: 500; }
.nav-links a:hover { color: var(--accent); text-decoration: none; }
.nav-links a.active { color: var(--accent); }
.nav-cta {
  background: var(--ink); color: #fff !important; padding: .42rem .8rem;
  border-radius: 8px; font-size: .85rem !important;
}
.nav-cta:hover { background: var(--accent); }
.nav-toggle { display: none; margin-left: auto; background: none; border: 0; font-size: 1.5rem; cursor: pointer; color: var(--ink); }

/* ---- Buttons ---- */
.btn {
  display: inline-block; padding: .68rem 1.15rem; border-radius: 10px;
  border: 1px solid var(--border-strong); background: #fff; color: var(--ink);
  font-weight: 600; font-size: .96rem; cursor: pointer; transition: .15s;
}
.btn:hover { text-decoration: none; border-color: var(--accent); transform: translateY(-1px); }
.btn-primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-dark); border-color: var(--accent-dark); }
.btn-ghost { background: transparent; }
.btn-ghost-light { background: transparent; color: #fff; border-color: rgba(255,255,255,.55); }
.btn-ghost-light:hover { border-color: #fff; }

/* ---- Layout helpers ---- */
.section { max-width: var(--max); margin: 0 auto; padding: 4rem 1.25rem; }
.band { background: var(--bg-band); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.section-title { font-size: 2rem; text-align: center; margin: 0 0 .6rem; }
.section-sub { text-align: center; color: var(--muted); max-width: 640px; margin: 0 auto 2.4rem; font-size: 1.05rem; }
.center { text-align: center; }
.eyebrow { display: inline-block; text-transform: uppercase; letter-spacing: .12em; font-size: .72rem; font-weight: 700; color: var(--accent); margin-bottom: .6rem; }

/* ---- Hero ---- */
.hero { background: radial-gradient(1100px 460px at 78% -8%, var(--accent-soft), transparent 60%), var(--bg-warm); border-bottom: 1px solid var(--border); }
.hero-inner {
  max-width: var(--max); margin: 0 auto; padding: 4.5rem 1.25rem 4rem;
  display: grid; grid-template-columns: 1.05fr 1fr; gap: 3rem; align-items: center;
}
.badges { display: flex; gap: .5rem; flex-wrap: wrap; margin-bottom: 1.1rem; }
.badge { font-size: .76rem; font-weight: 600; color: var(--accent-dark); background: #fff; border: 1px solid var(--border-strong); padding: .25rem .6rem; border-radius: 999px; }
.hero h1 { font-size: 3.1rem; margin: 0 0 1rem; letter-spacing: -.03em; }
.lead { font-size: 1.22rem; color: var(--ink-soft); margin: 0 0 1rem; }
.sub { color: var(--muted); margin: 0 0 1.6rem; }
.hero-cta { display: flex; gap: .7rem; flex-wrap: wrap; }
.hero-cta.center { justify-content: center; }
.hero-note { margin-top: 1rem; font-size: .85rem; color: var(--muted); }

/* ---- Code card ---- */
.code-card { background: var(--code-bg); border-radius: var(--radius); box-shadow: var(--shadow-lift); overflow: hidden; border: 1px solid #2a2f38; }
.code-head { display: flex; align-items: center; gap: .4rem; padding: .6rem .9rem; background: #161a20; border-bottom: 1px solid #2a2f38; }
.dot { width: 11px; height: 11px; border-radius: 50%; display: inline-block; }
.dot.r { background: #ec6a5e; } .dot.y { background: #f4bf4f; } .dot.g { background: #61c554; }
.code-file { margin-left: .6rem; color: #8b93a1; font-family: var(--mono); font-size: .78rem; }
.code-body { margin: 0; padding: 1.1rem 1.2rem; overflow-x: auto; }
.code-body code { color: var(--code-ink); font-size: .82rem; line-height: 1.7; white-space: pre; }
.code-body .k { color: #7fd0c2; } /* keys */
.code-body .s { color: #f4bf6a; } /* states */
.code-body .n { color: #c89bf0; } /* numbers */
.code-body .c { color: #6b7686; font-style: italic; } /* comments */
.transform-chip {
  margin-top: 1rem; display: flex; align-items: center; gap: .55rem; flex-wrap: wrap;
  justify-content: center; background: #fff; border: 1px solid var(--border-strong);
  border-radius: 999px; padding: .55rem 1rem; box-shadow: var(--shadow); font-size: .9rem; font-weight: 600;
}
.transform-chip .arrow, .transform-chip .plus { color: var(--accent); }

/* ---- Cards ---- */
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.1rem; }
.cards.small { grid-template-columns: repeat(4, 1fr); }
.card {
  display: block; background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
  padding: 1.4rem; color: var(--ink); box-shadow: var(--shadow); transition: .16s;
}
.card:hover { text-decoration: none; transform: translateY(-3px); box-shadow: var(--shadow-lift); border-color: var(--border-strong); }
.card-icon { font-size: 1.7rem; margin-bottom: .5rem; }
.card h3 { font-size: 1.1rem; margin: 0 0 .4rem; }
.card p { color: var(--muted); font-size: .92rem; margin: 0 0 .7rem; }
.card-link { color: var(--accent); font-weight: 600; font-size: .9rem; }
.card.feat { box-shadow: none; }
.card.feat:hover { transform: none; box-shadow: var(--shadow); }
.feat-head { display: flex; align-items: center; justify-content: space-between; gap: .6rem; margin-bottom: .3rem; }
.feat-head h3 { font-size: .98rem; }

/* ---- Fidelity pills ---- */
.fidelity { font-size: .66rem; text-transform: uppercase; letter-spacing: .07em; font-weight: 700; padding: .16em .55em; border-radius: 999px; border: 1px solid var(--border-strong); color: var(--muted); white-space: nowrap; }
.fidelity.executable { color: var(--teal); border-color: var(--teal); background: #e8f6f3; }
.fidelity.mapping { color: var(--accent-dark); border-color: var(--accent); background: var(--accent-soft); }
.fidelity.illustrative { color: #7a6a3d; border-color: #d8c79a; background: #f8f1dc; }

/* ---- Feature split ---- */
.feature-split { display: grid; grid-template-columns: 1fr 1fr; gap: 3rem; align-items: center; }
.feature-text h2 { font-size: 2rem; margin: 0 0 1rem; }
.feature-text p { color: var(--ink-soft); margin: 0 0 1rem; }
.transform-block { background: var(--code-bg); color: var(--code-ink); border-radius: var(--radius); padding: 1.4rem 1.5rem; box-shadow: var(--shadow-lift); overflow-x: auto; font-family: var(--mono); }
.transform-block code { font-size: .92rem; line-height: 2; white-space: pre; }
.transform-block .arrow { color: var(--accent); font-weight: 700; }

/* ---- Levels ---- */
.levels { text-align: center; }
.level-track { display: flex; flex-wrap: wrap; justify-content: center; gap: .7rem; margin: 0 auto 1.8rem; max-width: 820px; }
.level { display: flex; align-items: center; gap: .5rem; background: #fff; border: 1px solid var(--border); border-radius: 999px; padding: .5rem .95rem; font-size: .88rem; font-weight: 600; box-shadow: var(--shadow); }
.level-n { display: inline-grid; place-items: center; width: 22px; height: 22px; border-radius: 50%; background: var(--accent); color: #fff; font-size: .72rem; }

/* ---- CTA band ---- */
.cta-band { background: linear-gradient(135deg, var(--accent), var(--accent-dark)); color: #fff; text-align: center; padding: 4.5rem 1.25rem; }
.cta-band h2 { font-size: 2.1rem; margin: 0 0 .6rem; color: #fff; }
.cta-band p { color: rgba(255,255,255,.9); margin: 0 0 1.7rem; font-size: 1.08rem; }

/* ---- Generic page hero (cli, playground) ---- */
.page-hero { background: var(--bg-warm); border-bottom: 1px solid var(--border); }
.page-hero .section { padding-top: 3.4rem; padding-bottom: 2.4rem; }
.page-hero.compact .section { padding-bottom: 1.6rem; }
.page-hero h1 { font-size: 2.5rem; margin: 0 0 .8rem; }
.cmd-table, .prose table { width: 100%; border-collapse: collapse; margin: 1.2rem 0 2rem; font-size: .95rem; }
.cmd-table th, .cmd-table td, .prose th, .prose td { border: 1px solid var(--border); padding: .6rem .8rem; text-align: left; }
.cmd-table th, .prose th { background: var(--bg-band); }
.prose-pre, .prose pre { background: var(--code-bg); color: var(--code-ink); border-radius: var(--radius); padding: 1.1rem 1.2rem; overflow-x: auto; }
.prose-pre code { color: var(--code-ink); font-size: .86rem; }

/* ---- Docs layout ---- */
.docs-layout { max-width: var(--max); margin: 0 auto; display: grid; grid-template-columns: 256px 1fr; gap: 2.4rem; padding: 0 1.25rem; }
.sidebar { position: sticky; top: 58px; align-self: start; height: calc(100vh - 58px); overflow-y: auto; padding: 2rem 0; border-right: 1px solid var(--border); }
.sidebar-inner { padding-right: 1.2rem; }
.sidebar-title { font-size: .76rem; text-transform: uppercase; letter-spacing: .1em; color: var(--muted); font-weight: 700; margin: 0 0 .7rem; }
.sidebar-group { font-size: .72rem; text-transform: uppercase; letter-spacing: .09em; color: var(--muted); font-weight: 700; margin: 1.4rem 0 .5rem; }
.sidebar ul { list-style: none; margin: 0; padding: 0; }
.sidebar li a { display: block; padding: .34rem .65rem; border-radius: 8px; color: var(--ink-soft); font-size: .92rem; }
.sidebar li a:hover { background: var(--bg-band); text-decoration: none; }
.sidebar li a.active { background: var(--accent-soft); color: var(--accent-dark); font-weight: 600; }
.docs-content { padding: 2.4rem 0 4rem; min-width: 0; }

/* ---- Prose (markdown) ---- */
.prose { max-width: 760px; }
.prose h1 { font-size: 2.3rem; margin: 0 0 1.1rem; }
.prose h2 { font-size: 1.5rem; margin: 2.4rem 0 .9rem; padding-bottom: .35rem; border-bottom: 1px solid var(--border); }
.prose h3 { font-size: 1.15rem; margin: 1.8rem 0 .6rem; }
.prose p, .prose li { color: var(--ink-soft); }
.prose a { font-weight: 500; }
.prose blockquote { margin: 1.5rem 0; padding: .8rem 1.1rem; border-left: 4px solid var(--accent); background: var(--bg-band); border-radius: 0 8px 8px 0; color: var(--ink-soft); }
.prose blockquote p { margin: .3rem 0; }
.prose pre code { white-space: pre; }
.prose ul, .prose ol { padding-left: 1.3rem; }
.prose img { max-width: 100%; }
.prose hr { border: 0; border-top: 1px solid var(--border); margin: 2.4rem 0; }

/* ---- Playground ---- */
.playground { margin-top: .4rem; }
.pane-bar { display: flex; align-items: center; gap: .5rem; margin-bottom: .6rem; flex-wrap: wrap; }
.pane-spacer { flex: 1; }
.pg-select { background: #fff; color: var(--ink); border: 1px solid var(--border-strong); border-radius: 8px; padding: .42rem .5rem; font-size: .88rem; font-family: var(--font); }
.pg-target { min-width: 220px; }
.toggle { display: inline-flex; border: 1px solid var(--border-strong); border-radius: 8px; overflow: hidden; }
.toggle button { border: 0; background: #fff; color: var(--muted); padding: .42rem .7rem; font-size: .82rem; font-family: var(--mono); cursor: pointer; }
.toggle button + button { border-left: 1px solid var(--border-strong); }
.toggle button.active { background: var(--accent); color: #fff; }

/* ---- Machine simulator ---- */
.sim { margin-top: 1.4rem; border: 1px solid var(--border); border-radius: var(--radius); background: #fff; padding: 1rem; box-shadow: var(--shadow); }
.sim-bar { display: flex; align-items: center; gap: .6rem; flex-wrap: wrap; margin-bottom: .9rem; }
.sim-note { color: var(--muted); font-size: .82rem; }
.sim-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
@media (max-width: 760px) { .sim-grid { grid-template-columns: 1fr; } }
.sim-canvas { width: 100%; height: 280px; display: block; border-radius: var(--radius); }
.sim-right { display: flex; flex-direction: column; gap: .7rem; }
.sim-right .sim-canvas { height: 200px; }
.sim-chips { display: grid; grid-template-columns: repeat(4, 1fr); gap: .5rem; }
.sim-chip { background: var(--bg-band); border: 1px solid var(--border); border-radius: 10px; padding: .45rem .5rem; text-align: center; }
.sim-chip span { display: block; font-size: .64rem; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); }
.sim-chip strong { font-family: var(--mono); font-size: .98rem; color: var(--ink); }
.sim-status { display: flex; align-items: center; gap: .8rem; margin-top: .8rem; font-size: .85rem; color: var(--muted); }
.sim-phase { font-family: var(--mono); text-transform: uppercase; letter-spacing: .05em; color: var(--accent-dark); background: var(--accent-soft); border-radius: 999px; padding: .2em .7em; font-size: .72rem; }
.sim-program { margin-top: 1rem; }
.sim-program-head { font-size: .68rem; font-weight: 700; text-transform: uppercase; letter-spacing: .07em; color: var(--muted); margin-bottom: .55rem; display: flex; align-items: baseline; gap: .5rem; }
.sim-stepcount { font-family: var(--mono); font-weight: 500; letter-spacing: 0; text-transform: none; color: var(--muted); opacity: .8; }
.sim-steps { list-style: none; margin: 0; padding: 0; display: grid; gap: .35rem; max-height: 230px; overflow-y: auto; }
.sim-step { display: flex; align-items: center; gap: .65rem; padding: .5rem .65rem; border: 1px solid var(--border); border-radius: 10px; background: var(--bg-band); transition: background .15s, border-color .15s, opacity .15s; }
.sim-step-n { flex: none; width: 1.5rem; height: 1.5rem; display: grid; place-items: center; border-radius: 999px; background: #fff; border: 1px solid var(--border); font-family: var(--mono); font-size: .72rem; color: var(--muted); }
.sim-step-body { display: flex; flex-wrap: wrap; align-items: baseline; gap: .5rem; min-width: 0; }
.sim-step-title { font-weight: 600; font-size: .9rem; color: var(--ink); }
.sim-step-detail { font-family: var(--mono); font-size: .76rem; color: var(--muted); }
.sim-step.is-done { opacity: .55; }
.sim-step.is-done .sim-step-n { background: var(--accent-soft); border-color: transparent; color: var(--accent-dark); }
.sim-step.is-done .sim-step-n::after { content: "✓"; }
.sim-step.is-done .sim-step-n { font-size: 0; }
.sim-step.is-done .sim-step-n::after { font-size: .8rem; }
.sim-step.is-active { background: var(--accent-soft); border-color: var(--accent); box-shadow: 0 0 0 1px var(--accent); }
.sim-step.is-active .sim-step-n { background: var(--accent); border-color: var(--accent); color: #fff; }
.sim-step.is-active .sim-step-title { color: var(--accent-dark); }

/* control system: real compiled standards */
.ctrl { margin-top: 1.2rem; border-top: 1px solid var(--border); padding-top: 1rem; }
.ctrl-head { font-size: .68rem; font-weight: 700; text-transform: uppercase; letter-spacing: .07em; color: var(--ink); margin-bottom: .7rem; }
.ctrl-sub { font-weight: 500; text-transform: none; letter-spacing: 0; color: var(--muted); }
.ctrl-lifecycle { display: flex; align-items: center; gap: .4rem; flex-wrap: wrap; margin-bottom: .55rem; }
.ctrl-life-label { font-size: .64rem; font-weight: 700; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); margin-right: .3rem; }
.ctrl-xmuted { color: var(--muted); }
.ctrl-xmuted b { color: var(--muted); }
.ctrl-life { font-family: var(--mono); font-size: .68rem; letter-spacing: .05em; padding: .25em .6em; border-radius: 999px; background: var(--bg-band); color: var(--muted); border: 1px solid var(--border); }
.ctrl-life.is-on { background: var(--accent); color: #fff; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
.ctrl-life-arrow { color: var(--muted); font-size: .7rem; }
.ctrl-xref { display: flex; flex-wrap: wrap; gap: .4rem .9rem; margin-bottom: .8rem; font-size: .76rem; color: var(--muted); }
.ctrl-xitem { font-family: var(--mono); }
.ctrl-xitem b { color: var(--accent-dark); font-weight: 700; }
.ctrl-tabs { display: flex; flex-wrap: wrap; gap: .35rem; margin-bottom: .5rem; }
.ctrl-tab { font: 600 .76rem var(--sans, inherit); padding: .35rem .65rem; border-radius: 8px; border: 1px solid var(--border); background: #fff; color: var(--muted); cursor: pointer; transition: all .12s; }
.ctrl-tab:hover { color: var(--ink); border-color: var(--accent); }
.ctrl-tab.is-on { background: var(--ink); color: #fff; border-color: var(--ink); }
.ctrl-caption { font-size: .76rem; color: var(--muted); margin-bottom: .55rem; line-height: 1.4; }
.ctrl-code { margin: 0; background: #0f1218; border-radius: var(--radius); padding: .8rem .9rem; max-height: 320px; overflow: auto; }
.ctrl-code code { display: block; font-family: var(--mono); font-size: .76rem; line-height: 1.55; color: #c7cdd8; white-space: pre; }
.ctrl-code .cl { display: block; padding: 0 .4rem; margin: 0 -.4rem; border-left: 2px solid transparent; }
.ctrl-code .cl.hot { background: rgba(226,84,44,.16); border-left-color: var(--accent); color: #fbe9e2; }
.ctrl-empty { color: var(--muted); font-style: italic; }
.controls { display: flex; gap: 1.1rem; align-items: flex-end; flex-wrap: wrap; margin-bottom: 1.1rem; }
.controls label { display: flex; flex-direction: column; gap: .3rem; font-size: .72rem; color: var(--muted); text-transform: uppercase; letter-spacing: .05em; font-weight: 700; }
.controls select { background: #fff; color: var(--ink); border: 1px solid var(--border-strong); border-radius: 10px; padding: .55rem .6rem; min-width: 230px; font-size: .95rem; font-family: var(--font); }
.panes { display: grid; grid-template-columns: 1fr 1fr; gap: 1.1rem; }
.pane h3 { margin: .2rem 0 .55rem; font-size: .9rem; color: var(--muted); display: flex; align-items: center; gap: .6rem; text-transform: uppercase; letter-spacing: .04em; }
#source { width: 100%; height: 520px; background: var(--code-bg); color: var(--code-ink); border: 1px solid #2a2f38; border-radius: var(--radius); padding: 1.1rem; font-family: var(--mono); font-size: .8rem; line-height: 1.6; resize: vertical; }
#output { height: 520px; margin: 0; white-space: pre-wrap; word-break: break-word; font-size: .8rem; line-height: 1.6; }

/* ---- Footer ---- */
.site-footer { background: #15181d; color: #c4cad4; padding: 3.2rem 1.25rem 2rem; margin-top: 0; }
.footer-grid { max-width: var(--max); margin: 0 auto; display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 2rem; }
.footer-brand { font-weight: 800; font-size: 1.15rem; color: #fff; margin: 0 0 .5rem; }
.footer-about p { color: #8b93a1; font-size: .9rem; max-width: 320px; }
.footer-col h4 { color: #fff; font-size: .82rem; text-transform: uppercase; letter-spacing: .08em; margin: 0 0 .8rem; }
.footer-col a { display: block; color: #aab2bd; font-size: .9rem; margin-bottom: .45rem; }
.footer-col a:hover { color: var(--accent); text-decoration: none; }
.footer-legal { max-width: var(--max); margin: 2.2rem auto 0; padding-top: 1.4rem; border-top: 1px solid #262b32; color: #757d89; font-size: .82rem; text-align: center; }

/* ---- Responsive ---- */
@media (max-width: 920px) {
  .hero-inner, .feature-split { grid-template-columns: 1fr; }
  .hero h1 { font-size: 2.4rem; }
  .cards { grid-template-columns: repeat(2, 1fr); }
  .cards.small { grid-template-columns: repeat(2, 1fr); }
  .docs-layout { grid-template-columns: 1fr; }
  .sidebar { position: static; height: auto; border-right: 0; border-bottom: 1px solid var(--border); padding: 1.2rem 0; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 680px) {
  .nav-links { display: none; position: absolute; top: 56px; left: 0; right: 0; flex-direction: column; align-items: flex-start; gap: .2rem; background: #fff; border-bottom: 1px solid var(--border); padding: .6rem 1.25rem 1rem; }
  .nav-links.open { display: flex; }
  .nav-links a { padding: .5rem 0; width: 100%; }
  .nav-toggle { display: block; }
  .panes { grid-template-columns: 1fr; }
  .cards, .cards.small { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .section { padding: 2.8rem 1.25rem; }
}