/* ==========================================================================
   discover.nsi.xyz — base.css
   Structure, rythme et tokens par défaut. Chaque thème (css/themes/*.css)
   surcharge les variables ci-dessous et ajoute sa "signature".
   ========================================================================== */

:root {
  /* Couleurs */
  --bg: #ffffff;
  --bg-2: #f3f4f6;
  --surface: #ffffff;
  --text: #111827;
  --muted: #4b5563;
  --accent: #1d4ed8;
  --accent-ink: #ffffff;
  --accent-2: #f59e0b;
  --border: #e5e7eb;
  --focus: var(--accent);

  /* Formes et matière */
  --radius: 8px;
  --radius-lg: 16px;
  --radius-pill: 999px;
  --shadow: none;
  --shadow-lg: none;
  --border-w: 1px;

  /* Typo */
  --font-body: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-display: var(--font-body);
  --font-mono: "JetBrains Mono", ui-monospace, "Cascadia Code", Consolas, monospace;
  --display-weight: 800;
  --display-tracking: -0.02em;
  --display-transform: none;
  --body-size: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  --lh: 1.6;

  /* Rythme */
  --container: 72rem;
  --gutter: clamp(1rem, 4vw, 2.5rem);
  --space: clamp(4rem, 8vw, 7rem);
  --gap: 1.5rem;

  /* Mouvement */
  --ease: cubic-bezier(.2,.8,.2,1);
  --dur: .25s;

  color-scheme: light;
}

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

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: var(--body-size);
  line-height: var(--lh);
  color: var(--text);
  background: var(--bg);
  min-height: 100dvh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  padding-bottom: 9rem; /* place pour le dock */
}

img, svg { max-width: 100%; display: block; }
a { color: var(--accent); text-underline-offset: .15em; }
p { margin: 0 0 1em; }
h1, h2, h3 { margin: 0 0 .5em; font-family: var(--font-display); font-weight: var(--display-weight); letter-spacing: var(--display-tracking); text-transform: var(--display-transform); line-height: 1.1; text-wrap: balance; }
h2 { font-size: clamp(1.75rem, 1.3rem + 2vw, 2.75rem); }
h3 { font-size: clamp(1.125rem, 1rem + .5vw, 1.375rem); }
ul, ol { margin: 0; padding: 0; list-style: none; }
kbd { font-family: var(--font-mono); font-size: .85em; padding: .1em .45em; border: 1px solid var(--border); border-bottom-width: 2px; border-radius: 4px; background: var(--surface); }
code { font-family: var(--font-mono); font-size: .9em; }
em { font-style: italic; }

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

.skip { position: absolute; left: 1rem; top: -4rem; padding: .5rem 1rem; background: var(--accent); color: var(--accent-ink); z-index: 100; border-radius: var(--radius); }
.skip:focus { top: 1rem; }

/* Fond décoratif (utilisé par glass / maximal) */
.backdrop { position: fixed; inset: 0; z-index: -1; pointer-events: none; overflow: hidden; }
.blob { display: none; }

/* --------------------------------------------------------------------------
   En-tête
   -------------------------------------------------------------------------- */
.site-head {
  position: sticky; top: 0; z-index: 40;
  display: flex; align-items: center; gap: 1.5rem;
  padding: .85rem var(--gutter);
  background: var(--bg);
  border-bottom: var(--border-w) solid var(--border);
}
.brand { display: inline-flex; align-items: center; gap: .6rem; text-decoration: none; color: var(--text); font-weight: 700; }
.brand-mark { display: inline-grid; place-items: center; width: 2.25rem; height: 2.25rem; border-radius: var(--radius); background: var(--accent); color: var(--accent-ink); font-size: .8rem; font-weight: 800; letter-spacing: .02em; }
.brand-dot { color: var(--accent); }
.site-nav { display: flex; gap: 1.25rem; margin-inline-start: auto; }
.site-nav a { color: var(--muted); text-decoration: none; font-weight: 500; font-size: .95rem; }
.site-nav a:hover { color: var(--text); }
.lab-toggle { display: inline-flex; align-items: center; gap: .5rem; padding: .5rem .9rem; border: var(--border-w) solid var(--border); background: var(--surface); color: var(--text); border-radius: var(--radius-pill); font: inherit; font-size: .9rem; font-weight: 600; cursor: pointer; }
.lab-toggle-dot { width: .6rem; height: .6rem; border-radius: 50%; background: var(--accent); }
.lab-toggle[aria-expanded="false"] .lab-toggle-dot { background: var(--muted); }

@media (max-width: 720px) {
  .site-nav { display: none; }
  .lab-toggle { margin-inline-start: auto; }
}

/* --------------------------------------------------------------------------
   Sections
   -------------------------------------------------------------------------- */
main { display: block; }
.section, .hero, .cta { width: min(100% - 2 * var(--gutter), var(--container)); margin-inline: auto; padding-block: var(--space); }
.section-head { max-width: 46rem; margin-bottom: clamp(2rem, 4vw, 3rem); }
.section-intro { color: var(--muted); font-size: 1.05em; }
.eyebrow { font-family: var(--font-mono); font-size: .8rem; letter-spacing: .08em; text-transform: uppercase; color: var(--accent); margin-bottom: .75rem; font-weight: 700; }

/* Hero */
.hero { padding-top: clamp(3rem, 8vw, 6rem); }
.hero-title { font-size: clamp(2.5rem, 2rem + 4.5vw, 5.5rem); margin-bottom: .35em; }
.hero-title .line { display: block; }
.hero-title .accent-line { color: var(--accent); }
.lead { max-width: 40rem; font-size: clamp(1.1rem, 1rem + .5vw, 1.35rem); color: var(--muted); }
.hero-actions { display: flex; flex-wrap: wrap; gap: .75rem; margin: 1.75rem 0 2.5rem; }
.facts { display: grid; grid-template-columns: repeat(auto-fit, minmax(9rem, 1fr)); gap: var(--gap); margin: 0; max-width: 52rem; }
.fact { padding: 1rem 1.25rem; background: var(--surface); border: var(--border-w) solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); }
.fact dt { font-size: .8rem; color: var(--muted); text-transform: uppercase; letter-spacing: .06em; }
.fact dd { margin: .2rem 0 0; font-family: var(--font-display); font-weight: var(--display-weight); font-size: 1.6rem; line-height: 1.1; }
.hero-note { margin-top: 2.5rem; max-width: 40rem; font-size: .9rem; color: var(--muted); padding-inline-start: 1rem; border-inline-start: 3px solid var(--accent-2); }

/* Boutons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: .5rem; padding: .8rem 1.4rem; border-radius: var(--radius); font: inherit; font-weight: 600; text-decoration: none; cursor: pointer; border: var(--border-w) solid transparent; transition: transform var(--dur) var(--ease), background var(--dur), box-shadow var(--dur), color var(--dur); }
.btn-primary { background: var(--accent); color: var(--accent-ink); box-shadow: var(--shadow); }
.btn-primary:hover { filter: brightness(1.08); }
.btn-ghost { background: transparent; color: var(--text); border-color: var(--border); }
.btn-ghost:hover { background: var(--bg-2); }

/* Cartes */
.card { background: var(--surface); border: var(--border-w) solid var(--border); border-radius: var(--radius-lg); box-shadow: var(--shadow); padding: clamp(1.25rem, 3vw, 2rem); }

/* Timeline */
.timeline { display: grid; gap: 0; position: relative; max-width: 52rem; }
.tl-item { display: grid; grid-template-columns: 5rem 1fr; gap: 1.25rem; padding: 1.25rem 0; border-top: var(--border-w) solid var(--border); }
.tl-item:last-child { border-bottom: var(--border-w) solid var(--border); }
.tl-year { font-family: var(--font-mono); font-weight: 700; color: var(--accent); font-size: 1.05rem; padding-top: .2rem; }
.tl-body p { margin: 0; color: var(--muted); }
.tl-item.is-key .tl-year { color: var(--accent-2); }
.tl-item.is-key h3::after { content: " ★"; color: var(--accent-2); }

/* Programme */
.years { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 20rem), 1fr)); gap: var(--gap); }
.year-head { display: flex; align-items: center; justify-content: space-between; gap: 1rem; margin-bottom: 1rem; }
.year-head h3 { margin: 0; font-size: 1.5rem; }
.pill { display: inline-block; padding: .3rem .75rem; border-radius: var(--radius-pill); background: var(--bg-2); color: var(--text); font-size: .8rem; font-weight: 700; white-space: nowrap; }
.topics { display: grid; gap: .6rem; }
.topics li { position: relative; padding-inline-start: 1.4rem; }
.topics li::before { content: ""; position: absolute; left: 0; top: .6em; width: .55rem; height: .55rem; border-radius: 50%; background: var(--accent); }
.exam { margin-top: var(--gap); padding: clamp(1.25rem, 3vw, 2rem); border-radius: var(--radius-lg); background: var(--accent); color: var(--accent-ink); }
.exam h3 { margin-bottom: .35em; }
.exam p { margin: 0; }

/* Projets */
.projects { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 17rem), 1fr)); gap: var(--gap); }
.project { display: flex; flex-direction: column; }
.project-tag { align-self: flex-start; font-family: var(--font-mono); font-size: .75rem; letter-spacing: .06em; text-transform: uppercase; font-weight: 700; color: var(--accent); margin-bottom: .75rem; }
.project h3 { flex: 0; }
.project p { margin: 0; color: var(--muted); }

/* Débouchés */
.paths { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 15rem), 1fr)); gap: var(--gap); }
.path p { margin: 0; color: var(--muted); }
.paths-note { margin-top: var(--gap); color: var(--muted); max-width: 52rem; }

/* CTA */
.cta { text-align: center; padding-block: var(--space); }
.cta h2 { font-size: clamp(1.75rem, 1.3rem + 2.5vw, 3rem); }
.cta p { max-width: 36rem; margin-inline: auto; color: var(--muted); margin-bottom: 1.5rem; }

/* Pied de page */
.site-foot { text-align: center; padding: 2rem var(--gutter); border-top: var(--border-w) solid var(--border); color: var(--muted); font-size: .9rem; }
.site-foot p { margin: .25rem 0; }
.live-attr { color: var(--accent); }

/* Bandeau inter-versions (coût, crédits, liens croisés)
   Tout hérite de la couleur du pied de page : chaque thème garde ainsi le
   contraste qu'il a choisi pour son fond (noir en brutalisme, clair ailleurs),
   même quand ses règles `a { color: … }` sont plus spécifiques. */
.xnav { width: min(100%, var(--container)); margin: 0 auto 1.5rem; text-align: start;
  font-family: var(--font-display); color: inherit; }
.site-foot .xnav a { color: inherit; }
.xnav__exergue { margin: 0; font-size: .72rem; letter-spacing: .14em; text-transform: uppercase; color: inherit; }
.xnav__exergue b { color: inherit; background: color-mix(in srgb, var(--accent) 20%, transparent); padding: .05em .4em; border-radius: calc(var(--radius) / 2); }
.xnav__grid { display: flex; flex-wrap: wrap; align-items: stretch; gap: .4rem; max-width: 62rem; margin: .9rem auto 0; padding: 0; list-style: none; }
.xnav__grid > li { display: flex; flex: 1 1 15rem; min-width: 0; }
.xnav__item { display: flex; flex: 1 1 auto; flex-wrap: wrap; align-content: center; align-items: baseline; justify-content: space-between; gap: .25rem .8rem; min-width: 0; box-sizing: border-box; height: auto;
  padding: .65rem .85rem; text-decoration: none; color: inherit; border-radius: var(--radius);
  border: var(--border-w) solid color-mix(in srgb, var(--border) 80%, transparent); transition: background-color .2s ease; }
.xnav__item:hover { background: color-mix(in srgb, var(--accent) 12%, transparent); }
.xnav__item[aria-current="page"] { background: color-mix(in srgb, var(--accent) 16%, transparent); border-color: var(--accent); cursor: default; }
.xnav__name { font-weight: 700; font-size: .9rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.xnav__name::before { content: ""; flex: none; display: inline-block; width: .55rem; height: .55rem; border-radius: 50%; margin-right: .45rem; vertical-align: .06em; background: var(--x-accent, var(--accent)); }
.xnav__cost, .xnav__self { font-family: var(--font-mono); font-size: .72rem; color: inherit; opacity: .72; white-space: normal; }
.xnav__credit { display: block; margin-top: 1rem; font-size: .72rem; line-height: 1.6; color: inherit; opacity: .78; max-width: 74rem; }
.xnav__credit a { color: inherit; }
@media (max-width: 560px) { .xnav__grid > li { flex-basis: 100%; } .xnav__item { flex-wrap: wrap; } .xnav__cost, .xnav__self { white-space: normal; } }

/* --------------------------------------------------------------------------
   Style lab (dock)
   -------------------------------------------------------------------------- */
.lab { position: fixed; left: 0; right: 0; bottom: 0; z-index: 50; padding: 0 var(--gutter) max(1rem, env(safe-area-inset-bottom)); transition: transform .4s var(--ease), opacity .3s; }
.lab-inner { width: min(100%, var(--container)); margin-inline: auto; background: var(--surface); border: var(--border-w) solid var(--border); border-radius: var(--radius-lg); box-shadow: var(--shadow-lg); display: grid; grid-template-columns: auto 1fr; gap: 1rem 1.5rem; align-items: center; padding: .75rem 1rem; }
.lab-keys { display: flex; gap: .4rem; overflow-x: auto; scrollbar-width: none; padding: .25rem; margin: -.25rem; }
.lab-keys::-webkit-scrollbar { display: none; }
.key { flex: none; display: grid; gap: .1rem; justify-items: center; min-width: 3.6rem; padding: .45rem .5rem; border: var(--border-w) solid var(--border); border-radius: var(--radius); background: var(--bg-2); color: var(--text); font: inherit; cursor: pointer; transition: transform var(--dur) var(--ease), background var(--dur), color var(--dur), box-shadow var(--dur); }
.key-num { font-family: var(--font-mono); font-size: .75rem; font-weight: 700; opacity: .7; }
.key-name { font-size: .78rem; font-weight: 600; }
.key:hover { transform: translateY(-2px); }
.lab .key[aria-checked="true"] { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }
.lab .key[aria-checked="true"] .key-num { opacity: .85; }
.lab-info { min-width: 0; }
.lab-title { margin: 0 0 .15rem; font-size: .95rem; }
.lab-era { font-family: var(--font-mono); font-size: .78rem; color: var(--muted); margin-inline-start: .35rem; }
.lab-desc { margin: 0; font-size: .85rem; color: var(--muted); line-height: 1.4; }
.lab[hidden] { display: none; }
body.lab-collapsed { padding-bottom: 2rem; }
body.lab-collapsed .lab { transform: translateY(120%); opacity: 0; pointer-events: none; }

@media (max-width: 860px) {
  .lab-inner { grid-template-columns: 1fr; gap: .6rem; }
  .lab-desc { display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
  body { padding-bottom: 11rem; }
}

/* --------------------------------------------------------------------------
   Transitions de thème (View Transitions) + apparitions
   -------------------------------------------------------------------------- */
::view-transition-old(root) { animation: 320ms var(--ease) both vt-out; }
::view-transition-new(root) { animation: 480ms var(--ease) both vt-in; }
@keyframes vt-out { to { opacity: 0; filter: blur(6px); } }
@keyframes vt-in { from { opacity: 0; filter: blur(6px); transform: scale(.985); } }

.reveal { opacity: 0; transform: translateY(14px); transition: opacity .6s var(--ease), transform .6s var(--ease); }
.reveal.in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  .reveal { opacity: 1; transform: none; }
}