/* Hallmark · redesign · genre: modern-minimal · macrostructure: Narrative Workflow · theme: Cobalt (light · cool indigo · Space Grotesk)
   prev: atmospheric/Midnight (dark · warm) — differs on paper + accent + display · nav N5→N1b · shared across pages (multi-page system) */

:root {
  /* warm oat/cream paper (light but not white) + deep pine-green accent */
  --color-paper:    oklch(88% 0.019 75);
  --color-paper-2:  oklch(84.5% 0.02 75);
  --color-paper-3:  oklch(81% 0.021 75);
  --color-rule:     oklch(76% 0.014 75);
  --color-muted:    oklch(43% 0.022 65);
  --color-ink:      oklch(27% 0.022 55);
  --color-accent:   oklch(44% 0.095 158);   /* deep pine green */
  --color-accent-ink: oklch(96% 0.014 75);  /* light cream on green */
  --color-focus:    oklch(44% 0.095 158);

  --font-display: "Space Grotesk", ui-sans-serif, system-ui, sans-serif;
  --font-body:    "IBM Plex Sans", ui-sans-serif, system-ui, "Noto Sans Devanagari", "Noto Sans SC", sans-serif;
  --font-outlier: "JetBrains Mono", ui-monospace, "SFMono-Regular", monospace;

  --text-base: 1rem;
  --text-md:   1.2rem;
  --text-lg:   1.5rem;
  --text-xl:   1.95rem;
  --text-2xl:  clamp(1.9rem, 1.3rem + 2.6vw, 2.6rem);
  --text-display: clamp(2.4rem, 1.3rem + 5.4vw, 4.6rem);

  --space-s: 1rem;
  --space-m: 1.75rem;
  --space-l: 3rem;
  --space-xl: 5rem;
  --space-2xl: 7rem;

  --measure: 66ch;
  --radius: 14px;
}

*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { overflow-x: clip; scroll-behavior: smooth; }
body {
  overflow-x: clip;
  background: var(--color-paper);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-weight: 400;
  font-size: var(--text-base);
  line-height: 1.62;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
::selection { background: color-mix(in oklch, var(--color-accent) 24%, transparent); }

a { color: var(--color-accent); text-underline-offset: 3px; }
a:focus-visible { outline: 2px solid var(--color-focus); outline-offset: 3px; border-radius: 4px; }
h1, h2, h3, h4 { font-family: var(--font-display); font-weight: 600; letter-spacing: -0.022em; line-height: 1.1; color: var(--color-ink); }
p { overflow-wrap: anywhere; }
strong { font-weight: 600; }
code, kbd, pre { font-family: var(--font-outlier); }

.wrap { width: min(100% - 2.5rem, 1120px); margin-inline: auto; }
.wrap--narrow { width: min(100% - 2rem, 880px); margin-inline: auto; }

/* ---------- Nav: N1b clean top bar ---------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
  padding: 0.85rem 0; margin: 0 auto;
  width: min(100% - 2.5rem, 1120px);
  background: color-mix(in oklch, var(--color-paper) 86%, transparent);
  -webkit-backdrop-filter: blur(10px) saturate(120%);
  backdrop-filter: blur(10px) saturate(120%);
  border-bottom: 1px solid var(--color-rule);
}
.brand { display: inline-flex; align-items: center; gap: 0.55rem; text-decoration: none; font-family: var(--font-display); font-weight: 600; letter-spacing: -0.015em; color: var(--color-ink); font-size: 1.05rem; }
.brand__mark { width: 12px; height: 12px; background: var(--color-accent); border-radius: 3px; display: inline-block; transform: rotate(45deg); }
.nav__links { display: flex; align-items: center; gap: 0.2rem; }
.nav__links a:not(.nav__cta) {
  font-size: 0.94rem; color: var(--color-muted); text-decoration: none;
  padding: 0.45rem 0.7rem; border-radius: 8px; white-space: nowrap;
}
.nav__links a:not(.nav__cta):hover { color: var(--color-ink); background: var(--color-paper-2); }
.nav__links a.is-active { color: var(--color-accent); }
.nav__cta {
  font-family: var(--font-outlier); font-size: 0.82rem; letter-spacing: 0.01em;
  color: var(--color-accent-ink); background: var(--color-accent);
  padding: 0.5rem 0.95rem; border-radius: 8px; text-decoration: none; white-space: nowrap; font-weight: 500;
}
.nav__cta:hover { background: color-mix(in oklch, var(--color-accent) 88%, var(--color-ink)); }

/* ---------- Eyebrow / section heads ---------- */
.eyebrow, .section__eyebrow {
  font-family: var(--font-outlier); font-size: 0.76rem; letter-spacing: 0.18em; text-transform: uppercase;
  color: var(--color-accent); margin: 0 0 1rem; display: inline-flex; align-items: center; gap: 0.6rem;
}
.eyebrow::before { content: ""; width: 22px; height: 1px; background: currentColor; opacity: 0.7; }
.section__head { max-width: 72ch; margin-bottom: var(--space-l); }
.section__title { font-size: var(--text-2xl); margin: 0 0 0.9rem; }
.section__lead { color: var(--color-muted); max-width: var(--measure); margin: 0; font-size: 1.06rem; }

/* ---------- Hero ---------- */
.hero { padding: clamp(3.5rem, 9vh, 6rem) 0 var(--space-xl); }
.hero--center { text-align: center; }
.hero--center .eyebrow { justify-content: center; }
.hero--split { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr); gap: clamp(2rem, 5vw, 4rem); align-items: center; padding: clamp(3rem, 7vh, 5rem) 0 var(--space-xl); }
.hero__title { font-size: var(--text-display); letter-spacing: -0.035em; margin: 0; line-height: 1.02; max-width: 16ch; }
.hero--center .hero__title { margin-inline: auto; }
.hero__title em { font-style: normal; color: var(--color-accent); }
.hero__sub { max-width: 52ch; margin: 1.4rem 0 0; color: var(--color-muted); font-size: var(--text-md); line-height: 1.55; }
.hero--center .hero__sub { margin-inline: auto; }
.hero__cta { display: flex; gap: 0.7rem; flex-wrap: wrap; margin-top: 1.8rem; }
.hero--center .hero__cta { justify-content: center; }

/* ---------- Demo panel (agent harness UI simulation) ---------- */
.demo {
  background: var(--color-paper-2);
  border: 1px solid var(--color-rule);
  border-radius: 14px;
  padding: 1.3rem;
  font-family: var(--font-body);
  font-size: 0.85rem;
  line-height: 1.55;
  min-height: 380px;
  overflow: hidden;
}
.demo__reveal { opacity: 0; transform: translateY(6px); transition: opacity .4s ease, transform .4s ease; }
.demo__reveal.is-on { opacity: 1; transform: none; }

.demo__user { display: flex; gap: 0.6rem; align-items: flex-start; margin-bottom: 1.1rem; }
.demo__avatar { width: 24px; height: 24px; border-radius: 50%; background: var(--color-paper-3); border: 1px solid var(--color-rule); font-size: 0.68rem; font-weight: 500; display: grid; place-items: center; color: var(--color-muted); flex-shrink: 0; }
.demo__user-body { color: var(--color-ink); font-size: 0.86rem; padding-top: 0.1rem; }

.demo__agent { border-left: 2px solid var(--color-accent); padding-left: 0.85rem; margin-bottom: 0.7rem; }
.demo__stage { font-family: var(--font-outlier); font-size: 0.68rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--color-accent); margin-bottom: 0.35rem; font-weight: 500; }
.demo__text { color: var(--color-muted); font-size: 0.82rem; }

.demo__thinking { display: inline-flex; gap: 4px; align-items: center; padding: 0.25rem 0; }
.demo__thinking span { width: 5px; height: 5px; border-radius: 50%; background: var(--color-accent); animation: demo-think 1.2s ease-in-out infinite; }
.demo__thinking span:nth-child(2) { animation-delay: 0.18s; }
.demo__thinking span:nth-child(3) { animation-delay: 0.36s; }
.demo__thinking.is-done { display: none; }
@keyframes demo-think { 0%, 60%, 100% { opacity: 0.25; transform: translateY(0); } 30% { opacity: 1; transform: translateY(-3px); } }

.demo__content { display: none; }
.demo__content.is-show { display: block; }

.demo__reviewer { display: flex; align-items: center; gap: 0.5rem; padding: 0.18rem 0; font-size: 0.82rem; }
.demo__dot { width: 7px; height: 7px; border-radius: 50%; flex-shrink: 0; transition: background .25s ease; }
.demo__dot--working { background: var(--color-muted); animation: demo-pulse 1s ease-in-out infinite; }
.demo__dot--done { background: var(--color-accent); animation: none; }
@keyframes demo-pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.3; } }
.demo__name { font-family: var(--font-outlier); font-size: 0.76rem; color: var(--color-ink); }
.demo__result { font-size: 0.74rem; color: var(--color-muted); margin-left: auto; opacity: 0; transition: opacity .25s ease; }
.demo__result.is-show { opacity: 1; }

.demo__verdict { border: 1px solid var(--color-rule); border-radius: 10px; padding: 0.85rem 1rem; margin-top: 0.7rem; background: var(--color-paper); }
.demo__verdict-label { font-family: var(--font-outlier); font-size: 0.72rem; font-weight: 500; letter-spacing: 0.06em; text-transform: uppercase; color: var(--color-accent); margin-bottom: 0.5rem; }
.demo__finding { display: grid; grid-template-columns: 1.5rem minmax(0,1fr); gap: 0.4rem; font-size: 0.78rem; padding: 0.18rem 0; align-items: baseline; }
.demo__finding--reveal { opacity: 0; transition: opacity .3s ease; }
.demo__finding--reveal.is-on { opacity: 1; }
.demo__sev { font-family: var(--font-outlier); font-weight: 500; font-size: 0.72rem; }
.demo__sev--h { color: oklch(48% 0.16 28); }
.demo__sev--m { color: oklch(52% 0.13 60); }
.demo__file { font-family: var(--font-outlier); font-size: 0.74rem; color: var(--color-muted); }
.demo__finding-desc { color: var(--color-ink); font-size: 0.78rem; }

@media (max-width: 768px) {
  .hero--split { grid-template-columns: minmax(0, 1fr); }
  .demo { font-size: 0.78rem; min-height: 320px; }
}

.btn {
  font-family: var(--font-outlier); font-size: 0.88rem; letter-spacing: 0.01em;
  text-decoration: none; padding: 0.8rem 1.2rem; border-radius: 10px; white-space: nowrap;
  border: 1px solid var(--color-rule); color: var(--color-ink); background: var(--color-paper);
  transition: transform .18s ease, border-color .18s ease, background .18s ease;
  display: inline-flex; align-items: center; gap: 0.4rem;
}
.btn:hover { border-color: var(--color-accent); background: var(--color-paper-2); }
.btn:active { transform: translateY(1px); }
.btn--primary { background: var(--color-accent); color: var(--color-accent-ink); border-color: transparent; font-weight: 500; }
.btn--primary:hover { background: color-mix(in oklch, var(--color-accent) 88%, var(--color-ink)); border-color: transparent; }

/* ---------- Pipeline stages (Narrative Workflow) ---------- */
.pipeline { padding: var(--space-2xl) 0 var(--space-xl); }
.stage { display: grid; grid-template-columns: minmax(0, 9rem) minmax(0, 1fr); gap: clamp(1.2rem, 4vw, 3.5rem); align-items: start; padding: var(--space-l) 0; border-top: 1px solid var(--color-rule); }
.stage:last-child { border-bottom: 1px solid var(--color-rule); }
.stage__num { font-family: var(--font-outlier); font-size: 0.82rem; letter-spacing: 0.12em; color: var(--color-accent); padding-top: 0.45rem; }
.stage__num span { display: block; color: var(--color-muted); font-size: 0.72rem; letter-spacing: 0.18em; margin-top: 0.3rem; }
.stage__title { font-size: var(--text-xl); margin: 0 0 0.6rem; }
.stage__body { color: var(--color-muted); max-width: var(--measure); margin: 0; }
.stage__tags, .pillset { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-top: 1rem; }
.tag { font-family: var(--font-outlier); font-size: 0.72rem; letter-spacing: 0.01em; color: var(--color-muted); border: 1px solid var(--color-rule); padding: 0.28rem 0.6rem; border-radius: 999px; background: var(--color-paper-2); }

/* ---------- Grid / cards ---------- */
.cap { padding: var(--space-2xl) 0; }
.grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1px; background: var(--color-rule); border: 1px solid var(--color-rule); border-radius: var(--radius); overflow: hidden; }
.card { background: var(--color-paper); padding: clamp(1.3rem, 2.5vw, 1.9rem); }
.card h3 { font-size: 1.08rem; margin: 0 0 0.5rem; }
.card p { color: var(--color-muted); margin: 0; font-size: 0.96rem; }
.card code { font-size: 0.85em; color: var(--color-accent); }

/* ---------- Install / code blocks ---------- */
.install { padding: var(--space-2xl) 0; }
.install__inner { background: var(--color-paper-2); border: 1px solid var(--color-rule); border-radius: var(--radius); padding: clamp(1.5rem, 4vw, 2.6rem); }
.cmd, pre.cmd {
  font-family: var(--font-outlier); font-size: 0.9rem; color: var(--color-ink);
  background: var(--color-paper); border: 1px solid var(--color-rule); border-radius: 10px;
  padding: 0.9rem 1.05rem; margin: 1.1rem 0; overflow-x: auto; line-height: 1.7;
}
pre.cmd { white-space: pre; }
.cmd .prm { color: var(--color-accent); }
.cmd .cmt { color: var(--color-muted); }
.note { color: var(--color-muted); font-size: 0.94rem; margin: 1rem 0 0; max-width: 64ch; }
.note a { color: var(--color-accent); }
.kbd { font-family: var(--font-outlier); font-size: 0.85em; border: 1px solid var(--color-rule); border-radius: 6px; padding: 0.08rem 0.4rem; color: var(--color-muted); background: var(--color-paper-2); }

/* ---------- Docs layout ---------- */
.docs { padding: var(--space-xl) 0 var(--space-2xl); display: grid; grid-template-columns: minmax(0, 15rem) minmax(0, 1fr); gap: clamp(1.5rem, 5vw, 4rem); align-items: start; }
.toc { position: sticky; top: 5rem; font-size: 0.9rem; }
.toc__title { font-family: var(--font-outlier); font-size: 0.72rem; letter-spacing: 0.16em; text-transform: uppercase; color: var(--color-muted); margin: 0 0 0.8rem; }
.toc ul { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 0.1rem; }
.toc a { color: var(--color-muted); text-decoration: none; padding: 0.3rem 0.6rem; border-radius: 6px; display: block; border-left: 2px solid transparent; }
.toc a:hover { color: var(--color-ink); background: var(--color-paper-2); }
.doc h2 { font-size: var(--text-xl); margin: var(--space-l) 0 0.8rem; padding-top: 1rem; scroll-margin-top: 5rem; }
.doc h2:first-child { margin-top: 0; }
.doc h3 { font-size: 1.2rem; margin: 1.6rem 0 0.5rem; }
.doc p, .doc li { color: var(--color-3, var(--color-ink)); }
.doc p { color: var(--color-muted); }
.doc ul { padding-left: 1.2rem; }
.doc li { margin: 0.35rem 0; color: var(--color-muted); }
.doc li strong, .doc p strong { color: var(--color-ink); }
.doc .callout { background: var(--color-paper-2); border: 1px solid var(--color-rule); border-left: 3px solid var(--color-accent); border-radius: 8px; padding: 0.9rem 1.1rem; margin: 1.2rem 0; }
.doc .callout p { margin: 0; color: var(--color-ink); font-size: 0.94rem; }
.table { width: 100%; border-collapse: collapse; font-size: 0.94rem; margin: 1rem 0; }
.table th, .table td { text-align: left; padding: 0.6rem 0.8rem; border-bottom: 1px solid var(--color-rule); vertical-align: top; }
.table th { font-family: var(--font-outlier); font-size: 0.78rem; letter-spacing: 0.06em; text-transform: uppercase; color: var(--color-muted); }
.table td code { font-size: 0.85em; color: var(--color-accent); }

/* ---------- Footer ---------- */
.footer { padding: var(--space-2xl) 0 var(--space-l); border-top: 1px solid var(--color-rule); margin-top: var(--space-xl); }
.footer__top { display: flex; justify-content: space-between; gap: 2rem; flex-wrap: wrap; align-items: flex-end; margin-bottom: 2rem; }
.footer__statement { font-size: clamp(1.3rem, 1rem + 1.4vw, 1.9rem); margin: 0; max-width: 22ch; }
.footer__links { display: flex; gap: 0.5rem 1.5rem; flex-wrap: wrap; }
.footer__links a { color: var(--color-muted); text-decoration: none; font-size: 0.92rem; }
.footer__links a:hover { color: var(--color-accent); }
.footer__copy { color: var(--color-muted); font-family: var(--font-outlier); font-size: 0.8rem; border-top: 1px solid var(--color-rule); padding-top: 1.2rem; }

/* ---------- Motion (fade-in, reduced-motion safe) ---------- */
.reveal { opacity: 0; transform: translateY(8px); transition: opacity .55s ease, transform .55s ease; }
.reveal.is-in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { .reveal { opacity: 1; transform: none; transition: none; } html { scroll-behavior: auto; } }

/* ---------- Responsive ---------- */
@media (max-width: 980px) { .docs { grid-template-columns: minmax(0, 1fr); } .toc { position: static; margin-bottom: 1rem; } .toc ul { flex-direction: row; flex-wrap: wrap; } }
@media (max-width: 860px) { .grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 768px) { .stage { grid-template-columns: minmax(0, 1fr); gap: 0.7rem; } .stage__num { padding-top: 0; } }
@media (max-width: 640px) {
  .nav__links a:not(.nav__cta):not(.nav__keep) { display: none; }   /* keep Docs + CTA on phones */
  .lang__code { display: none; }   /* phones: flag only */
  .grid { grid-template-columns: minmax(0, 1fr); }
  .footer__top { flex-direction: column; align-items: flex-start; }
}
@media (max-width: 400px) { .hero__cta { flex-direction: column; align-items: stretch; } .btn { justify-content: center; } }

/* Language selector */
.lang { position: relative; margin-left: 0.4rem; }
.lang__btn {
  display: inline-flex; align-items: center; gap: 0.35rem;
  padding: 0.3rem 0.5rem; border: 1px solid var(--color-rule);
  background: var(--color-paper); border-radius: 8px;
  color: var(--color-muted); font: inherit; font-size: 0.85rem;
  cursor: pointer; line-height: 1;
}
.lang__btn:hover { color: var(--color-ink); background: var(--color-paper-2); }
.lang__btn:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 1px; }
.lang__btn svg, .lang__menu a svg { width: 20px; aspect-ratio: 3 / 2; height: auto; border-radius: 2px; display: block; flex-shrink: 0; }
.lang__menu a svg { width: 18px; }
.lang__code { font-weight: 600; letter-spacing: 0.02em; }
.lang__menu {
  position: absolute; right: 0; top: calc(100% + 4px); z-index: 50;
  list-style: none; margin: 0; padding: 0.3rem; min-width: 11rem;
  background: var(--color-paper); border: 1px solid var(--color-rule);
  border-radius: 10px; box-shadow: 0 8px 24px rgba(0,0,0,0.12);
}
.lang__menu a {
  display: flex; align-items: center; gap: 0.5rem;
  padding: 0.4rem 0.5rem; border-radius: 6px;
  color: var(--color-muted); text-decoration: none; font-size: 0.9rem;
}
.lang__menu a:hover { background: var(--color-paper-2); color: var(--color-ink); }
.lang__menu a:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 1px; }
.lang__menu a[aria-current="page"] { color: var(--color-accent); font-weight: 600; }

/* Skip to content (keyboard/SR bypass) */
.skip-link {
  position: absolute; top: 0; left: 0; z-index: 100;
  transform: translateY(-150%);
  padding: 0.5rem 0.9rem; background: var(--color-accent); color: #fff;
  border-radius: 0 0 8px 8px; text-decoration: none; font-size: 0.85rem;
  transition: transform 0.15s ease;
}
.skip-link:focus { transform: translateY(0); }