/* ============================================================
   NSI — discover.nsi.xyz
   Socle structurel : variables, layout, typographie, composants
   Les 9 esthétiques sont définies dans themes.css via data-theme
   ============================================================ */

:root {
  /* Typo par défaut (écrasée par les thèmes) */
  --ff-display: 'Space Grotesk', sans-serif;
  --ff-body: 'Inter', sans-serif;
  --ff-mono: 'JetBrains Mono', monospace;

  --fs-hero: clamp(2.4rem, 6vw, 5rem);
  --fs-h2: clamp(1.6rem, 3vw, 2.4rem);
  --fs-h3: clamp(1.05rem, 1.4vw, 1.25rem);
  --fs-text: clamp(.95rem, 1.1vw, 1.05rem);
  --fs-small: .8rem;

  /* Géométrie par défaut */
  --maxw: 1100px;
  --radius: 0px;
  --pad-card: 1.6rem;
  --gap: 1.1rem;

  /* Couleurs par défaut (écrasées par les thèmes) */
  --bg: #fafafa;
  --bg-alt: #f0f0f0;
  --bg-card: #ffffff;
  --ink: #16181d;
  --ink-soft: #555b66;
  --accent: #3450f5;
  --accent-ink: #ffffff;
  --line: #d8d8d8;
  --shadow: none;

  /* Effets optionnels */
  --hero-blend: normal;
  --btn-shadow: none;
  --card-border: 1px solid var(--line);
  --body-bg-image: none;
  --body-attachment: scroll;
  --heading-transform: none;
  --heading-family: var(--ff-display);
  --body-family: var(--ff-body);
  --label-family: var(--ff-body);
  --kicker-family: var(--ff-body);
  --tl-family: var(--ff-display);
  --topbar-bg: transparent;
  --topbar-border: 1px solid transparent;
  --topbar-blur: none;
  --topbar-shadow: none;
  --dock-bg: #ffffff;
  --dock-border: 1px solid var(--line);
  --dock-blur: none;
  --dock-shadow: 0 4px 18px rgba(0,0,0,.08);
  --dock-name-display: none;
  --section-head-layout: row;
  --section-head-align: flex-start;
  --section-gap: clamp(3.5rem, 8vw, 6.5rem);
  --card-border: 1px solid var(--line);
  --card-shadow: none;
  --card-decoration: none;
  --card-hover: translateY(-2px);
  --card-hover-shadow: var(--card-shadow);
  --title-underline: none;
  --h3-weight: 700;
  --hero-layout: row;
  --hero-visual-display: flex;
  --hero-visual-grid: flex;
  --chips-size: 5rem;
  --module-num-display: inline-flex;
  --module-num-size: 1rem;
  --module-num-weight: 700;
  --tl-layout: grid;
  --tl-width: 1fr;
  --tl-line-display: none;
  --footer-border: 1px solid var(--line);
  --letter-tight: -0.01em;
  --text-line-height: 1.65;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--body-family);
  font-size: var(--fs-text);
  line-height: var(--text-line-height);
  color: var(--ink);
  background-color: var(--bg);
  background-image: var(--body-bg-image);
  background-attachment: var(--body-attachment);
  min-height: 100vh;
  overflow-x: hidden;
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  background: var(--body-overlay, none);
  pointer-events: none;
  z-index: 0;
}

img { max-width: 100%; display: block; }
a { color: inherit; }
button { font: inherit; color: inherit; background: none; border: none; cursor: pointer; }

::selection { background: var(--accent); color: var(--accent-ink); }

.layout { position: relative; z-index: 1; }
main { position: relative; max-width: var(--maxw); margin: 0 auto; padding: 0 clamp(1.1rem, 4vw, 2rem) var(--section-gap); }

/* ---------- Topbar ---------- */
.topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: .9rem clamp(1.1rem, 4vw, 2rem);
  background: var(--topbar-bg);
  border-bottom: var(--topbar-border);
  backdrop-filter: var(--topbar-blur);
  -webkit-backdrop-filter: var(--topbar-blur);
  box-shadow: var(--topbar-shadow);
}

.brandmark { display: flex; align-items: center; gap: .65rem; min-width: 0; }
.brandmark-node { width: .85rem; height: .85rem; border-radius: 50%; background: var(--accent); flex-shrink: 0; box-shadow: var(--brand-node-shadow, none); }
.brandmark-word { display: flex; flex-direction: column; line-height: 1.15; }
.brandmark-word strong { font-family: var(--ff-display); font-size: 1.05rem; letter-spacing: var(--letter-tight); }
.brandmark-word span { font-size: .68rem; color: var(--ink-soft); letter-spacing: .02em; }

.topnav { display: flex; gap: clamp(.8rem, 2vw, 1.6rem); }
.topnav a {
  font-size: .82rem;
  color: var(--ink-soft);
  text-decoration: none;
  font-weight: 600;
  letter-spacing: .02em;
  transition: color .2s ease;
  white-space: nowrap;
}
.topnav a:hover { color: var(--accent); }
.topnav a:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 2px; }

/* ---------- Hero ---------- */
.hero {
  min-height: calc(100svh - 90px);
  display: var(--hero-layout);
  align-items: center;
  gap: clamp(2rem, 5vw, 4rem);
  padding: clamp(2.5rem, 6vh, 5rem) 0;
}

.hero-content { flex: 1 1 55%; position: relative; z-index: 2; }

.hero-kicker {
  font-family: var(--kicker-family);
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1.1rem;
}

.hero-title {
  font-family: var(--heading-family);
  font-size: var(--fs-hero);
  font-weight: 800;
  line-height: 1.04;
  letter-spacing: var(--letter-tight);
  margin-bottom: 1.4rem;
  text-transform: var(--heading-transform);
}
.hero-title .accent { color: var(--accent); }

.hero-lede {
  font-size: clamp(1rem, 1.5vw, 1.2rem);
  color: var(--ink-soft);
  max-width: 34em;
  margin-bottom: 2rem;
}

.hero-actions { display: flex; flex-wrap: wrap; gap: .8rem; margin-bottom: 2.2rem; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  padding: .85rem 1.6rem;
  font-weight: 700;
  font-size: .92rem;
  text-decoration: none;
  border-radius: var(--radius);
  border: 1px solid transparent;
  transition: transform .2s ease, box-shadow .25s ease, background .25s ease, color .25s ease;
}
.btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
.btn.primary { background: var(--accent); color: var(--accent-ink); box-shadow: var(--btn-shadow); }
.btn.primary:hover { transform: translateY(-2px); }
.btn.ghost { border-color: var(--line); color: var(--ink); background: transparent; }
.btn.ghost:hover { border-color: var(--ink); transform: translateY(-2px); }

.hero-hint {
  font-family: var(--ff-mono);
  font-size: .75rem;
  color: var(--ink-soft);
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  opacity: .85;
}
.hero-hint-glyph { color: var(--accent); }

/* Visuel hero : grille de "puces" abstraites */
.hero-visual { flex: 1 1 40%; display: flex; justify-content: center; }
.hero-visual-inner { position: relative; width: 100%; max-width: 380px; aspect-ratio: 1; display: var(--hero-visual-grid); }
.chip {
  position: absolute;
  display: var(--hero-visual-display);
  align-items: center;
  justify-content: center;
  width: var(--chips-size);
  height: var(--chips-size);
  border-radius: var(--radius);
  background: var(--bg-card);
  border: var(--card-border);
  box-shadow: var(--card-shadow);
  font-family: var(--ff-mono);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--accent);
  transition: transform .5s cubic-bezier(.2,.8,.3,1), box-shadow .3s ease, border-radius .5s ease;
}
.chip i { font-style: normal; }
.chip:hover { transform: scale(1.08) rotate(3deg); }
.chip.c1 { top: 8%;  left: 6%;  transform: rotate(-6deg); }
.chip.c2 { top: 20%; right: 4%; transform: rotate(5deg); }
.chip.c3 { top: 44%; left: 34%; transform: rotate(-3deg); width: calc(var(--chips-size) * 1.3); height: calc(var(--chips-size) * 1.3); background: var(--accent); color: var(--accent-ink); border: none; }
.chip.c4 { bottom: 14%; left: 10%; transform: rotate(4deg); }
.chip.c5 { bottom: 4%; right: 14%; transform: rotate(-5deg); }

/* ---------- Sections ---------- */
.section { padding-top: var(--section-gap); }

.section-head {
  display: flex;
  flex-direction: var(--section-head-layout);
  align-items: var(--section-head-align);
  gap: 1.1rem;
  margin-bottom: clamp(1.8rem, 4vw, 3rem);
}

.section-index {
  font-family: var(--ff-mono);
  font-size: .85rem;
  font-weight: 700;
  color: var(--accent);
  border: 1px solid currentColor;
  padding: .3rem .55rem;
  border-radius: var(--radius);
  flex-shrink: 0;
}

.section h2 {
  font-family: var(--heading-family);
  font-size: var(--fs-h2);
  font-weight: 800;
  letter-spacing: var(--letter-tight);
  line-height: 1.1;
  text-transform: var(--heading-transform);
  text-decoration: var(--title-underline);
}

.section-tagline { color: var(--ink-soft); margin-top: .35rem; font-size: .98rem; }

/* ---------- Cards & grids ---------- */
.grid { display: grid; gap: var(--gap); }
.g-2 { grid-template-columns: repeat(2, 1fr); }
.g-3 { grid-template-columns: repeat(3, 1fr); }
.g-4 { grid-template-columns: repeat(4, 1fr); }

.card {
  background: var(--bg-card);
  border: var(--card-border);
  border-radius: var(--radius);
  box-shadow: var(--card-shadow);
  padding: var(--pad-card);
  position: relative;
  transition: transform .3s ease, box-shadow .3s ease;
}
.card:hover { transform: var(--card-hover); box-shadow: var(--card-hover-shadow); }

.card-title {
  font-family: var(--heading-family);
  font-size: var(--fs-h3);
  font-weight: var(--h3-weight);
  letter-spacing: var(--letter-tight);
  margin-bottom: .5rem;
  text-transform: var(--heading-transform);
}

.card-text { color: var(--ink-soft); font-size: .95rem; }

/* Modules programme */
.module {
  background: var(--bg-card);
  border: var(--card-border);
  border-radius: var(--radius);
  box-shadow: var(--card-shadow);
  padding: var(--pad-card);
  position: relative;
  transition: transform .3s ease, box-shadow .3s ease;
}
.module:hover { transform: var(--card-hover); box-shadow: var(--card-hover-shadow); }
.module-num {
  display: var(--module-num-display);
  align-items: center;
  justify-content: center;
  width: 2.4rem;
  height: 2.4rem;
  margin-bottom: .9rem;
  font-size: var(--module-num-size);
  font-weight: var(--module-num-weight);
  color: var(--accent);
  border: 1px solid var(--accent);
  border-radius: var(--radius);
  font-family: var(--ff-mono);
}
.module-alt { background: var(--accent); color: var(--accent-ink); }
.module-alt .card-title { color: inherit; }
.module-alt .card-text { color: color-mix(in srgb, var(--accent-ink) 82%, var(--accent)); }
.module-alt .module-num { color: inherit; border-color: currentColor; }

/* Timeline ancêtres */
.timeline { display: var(--tl-layout); gap: var(--gap); grid-template-columns: var(--tl-width); position: relative; }
.tl-item {
  background: var(--bg-card);
  border: var(--card-border);
  border-radius: var(--radius);
  box-shadow: var(--card-shadow);
  padding: var(--pad-card);
  position: relative;
  transition: transform .3s ease, box-shadow .3s ease;
}
.tl-item:hover { transform: var(--card-hover); box-shadow: var(--card-hover-shadow); }
.tl-year {
  font-family: var(--tl-family);
  font-size: 1rem;
  font-weight: 800;
  color: var(--accent);
  margin-bottom: .6rem;
  letter-spacing: .05em;
}
.tl-line { display: none; }

/* Débouchés */
.outcome { text-align: var(--outcome-align, left); }
.outcome-glyph {
  width: 2.6rem;
  height: 2.6rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--ff-mono);
  font-size: .8rem;
  font-weight: 700;
  color: var(--accent-ink);
  background: var(--accent);
  border-radius: var(--radius);
  margin-bottom: .9rem;
}

/* ---------- Finale + footer ---------- */
.finale {
  text-align: center;
  padding: clamp(3rem, 8vw, 6rem) 1rem;
  margin-top: var(--section-gap);
}
.finale-kicker {
  font-family: var(--kicker-family);
  text-transform: uppercase;
  letter-spacing: .18em;
  font-size: .78rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 1rem;
}
.finale-title {
  font-family: var(--heading-family);
  font-size: clamp(1.7rem, 4vw, 3rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: var(--letter-tight);
  margin-bottom: 1.2rem;
  text-transform: var(--heading-transform);
}
.finale-text { color: var(--ink-soft); max-width: 36em; margin: 0 auto; }

.footer {
  display: flex;
  flex-direction: column;
  gap: .3rem;
  padding-top: 1.5rem;
  margin-top: var(--section-gap);
  border-top: var(--footer-border);
  font-family: var(--ff-mono);
  font-size: .75rem;
  color: var(--ink-soft);
}

/* ---------- Dock (sélecteur de style) ---------- */
.dock-zone {
  position: fixed;
  left: 50%;
  bottom: 1.1rem;
  transform: translateX(-50%);
  z-index: 100;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: .35rem;
}

.dock-label {
  font-family: var(--ff-mono);
  font-size: .62rem;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--ink-soft);
  background: var(--bg);
  padding: .1rem .6rem;
  border-radius: 99px;
}

.dock {
  display: flex;
  gap: .25rem;
  padding: .4rem;
  background: var(--dock-bg);
  border: var(--dock-border);
  border-radius: calc(var(--radius) + 14px);
  backdrop-filter: var(--dock-blur);
  -webkit-backdrop-filter: var(--dock-blur);
  box-shadow: var(--dock-shadow);
  max-width: calc(100vw - 1.5rem);
  overflow-x: auto;
  scrollbar-width: none;
}
.dock::-webkit-scrollbar { display: none; }

.dock-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: .15rem;
  min-width: 3.4rem;
  padding: .5rem .45rem;
  border-radius: calc(var(--radius) + 9px);
  color: var(--ink-soft);
  transition: background .2s ease, color .2s ease, transform .2s ease, box-shadow .2s ease;
  flex-shrink: 0;
}
.dock-btn:hover { background: color-mix(in srgb, var(--accent) 12%, transparent); color: var(--ink); transform: translateY(-2px); }
.dock-btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.dock-btn.active { background: var(--accent); color: var(--accent-ink); }
.dock-btn.active .dock-name { color: inherit; }

.dock-glyph { font-size: 1.05rem; line-height: 1; }
.dock-name { font-size: .58rem; font-weight: 700; letter-spacing: .04em; display: var(--dock-name-display); }

.dock-btn-random { border-left: 1px dashed var(--line); }

/* ---------- Responsive ---------- */
@media (max-width: 920px) {
  .g-4 { grid-template-columns: repeat(2, 1fr); }
  .g-3 { grid-template-columns: repeat(2, 1fr); }
  .hero { flex-direction: column; text-align: left; }
  .hero-visual { display: none; }
}

@media (max-width: 640px) {
  .g-2, .g-3, .g-4 { grid-template-columns: 1fr; }
  .topnav { display: none; }
  .hero { min-height: auto; }
  .dock-btn { min-width: 2.9rem; }
  .dock-name { display: none; }
  .dock-btn-random { border-left: 1px dashed var(--line); }
}

/* ---------- Accessibilité ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; animation: none !important; }
}

/* ---------- Bandeau inter-versions (coût, crédits, liens croisés) ---------- */
.xnav {
  width: 100%;
  box-sizing: border-box;
  min-width: 0;
  margin-bottom: clamp(1.4rem, 3vw, 2.4rem);
  padding-bottom: clamp(1.4rem, 3vw, 2.2rem);
  border-bottom: 1px solid color-mix(in srgb, var(--ink-soft, #555) 32%, transparent);
  font-family: var(--ff-display, inherit);
  color: var(--ink, #111);
}
.xnav__grid {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: .4rem 1.75rem;
  max-width: 76rem;
  margin: .9rem 0 0;
  padding: 0;
  list-style: none;
}
.xnav__grid > li {
  display: flex;
  flex: 0 0 auto;
  min-width: 0;
  max-width: 100%;
}
.xnav__item {
  display: inline-flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: .1rem .5rem;
  min-width: 0;
  max-width: 100%;
  padding: 0;
  text-decoration: none;
  color: inherit;
}
.xnav__item:hover .xnav__name {
  text-decoration: underline;
  text-underline-offset: .15em;
}
.xnav__item[aria-current="page"] .xnav__name {
  color: var(--accent, #3450f5);
}
.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, #3450f5));
}
.xnav__cost {
  font-family: var(--ff-mono, monospace);
  font-size: .72rem;
  color: var(--ink-soft, #555);
  white-space: normal;
}
.xnav__self {
  white-space: normal;
  font-size: .72rem;
  color: var(--ink-soft, #555);
  font-family: var(--ff-mono, monospace);
}
.xnav__credit {
  display: block;
  margin-top: 1rem;
  font-size: .72rem;
  line-height: 1.6;
  color: var(--ink-soft, #555);
  max-width: 74rem;
}
.xnav__credit a {
  color: inherit;
}
.xnav__exergue {
  font-size: .72rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--ink-soft, #555);
  margin: 0;
}
.xnav__exergue b {
  color: var(--accent, #3450f5);
}
@media (max-width: 560px) {
  .xnav__grid { gap: .3rem 1.1rem; }
}