/* ==========================================================================
   BADGIR — Les tours du vent
   Design tokens
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=DM+Mono:wght@400;500&display=swap');

:root{
  /* couleurs — nuit désertique */
  --void:        #0a0d12;
  --panel:       #10141b;
  --panel-2:     #161b24;
  --panel-3:     #1c222d;
  --line:        rgba(237,234,225,0.09);
  --line-strong: rgba(237,234,225,0.16);

  /* accents — vent (froid) / soleil (chaud) */
  --wind:        #d79a60;
  --wind-dim:    rgba(242,165,60,0.14);
  --heat:        #e2542a;
  --heat-dim:    rgba(226,84,42,0.14);

  --text:        #ede9e0;
  --text-muted:  #98a0ae;
  --text-faint:  #7d8695;

 /* typographie — Inter pour l'affichage et le texte, mono pour les données */
  --display: 'Inter', system-ui, -apple-system, sans-serif;
  --body:    'Inter', system-ui, -apple-system, sans-serif;
  --mono:    'DM Mono', ui-monospace, monospace;
  --container: 1180px;
  --nav-h:     76px;
}

*,*::before,*::after{ box-sizing:border-box; }
html{ scroll-behavior:smooth; }
body{
  margin:0;
  background:var(--void);
  color:var(--text);
  font-family:var(--body);
  font-size:16px;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{ max-width:100%; display:block; }
a{ color:inherit; text-decoration:none; }
ul{ margin:0; padding:0; list-style:none; }

/* Display et body partagent Inter : la hiérarchie passe par la graisse
   et un letter-spacing resserré sur les grands corps. */
h1,h2,h3,h4{ color: white; font-family:var(--display); font-weight:600; margin:0; letter-spacing:-0.02em; }
h1{ font-weight:600; letter-spacing:-0.035em; }
h2{ letter-spacing:-0.025em; }
p{ margin:0; }

::selection{ background:var(--wind); color:var(--void); }

/* focus clavier visible */
a:focus-visible, button:focus-visible{
  outline:2px solid var(--wind); outline-offset:3px; border-radius:4px;
}

/* texture de fond : grille discrète + vignettage */
body::before{
  content:"";
  position:fixed; inset:0;
  background-image:
    linear-gradient(rgba(237,234,225,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(237,234,225,0.025) 1px, transparent 1px);
  background-size:64px 64px;
  pointer-events:none;
  z-index:0;
  mask-image:radial-gradient(ellipse 80% 60% at 50% 0%, black 30%, transparent 75%);
}

.container{ max-width:var(--container); margin:0 auto; padding:0 32px; position:relative; z-index:1; }

/* ---------- eyebrow / labels ---------- */
.eyebrow{
  display:inline-flex; align-items:center; gap:7px;
  font-family:var(--mono); font-size:12px; letter-spacing:0.10em; text-transform:uppercase;
  color:var(--wind);
}
.eyebrow::before{
  content:"→";
  display:block;
  font-size:14px;
  line-height:1;
  flex-shrink:0;
  margin-left:2px;
}
.eyebrow.heat{ color:var(--heat); }

/* pas de second filet quand un .eyebrow est imbriqué dans un autre */
.eyebrow .eyebrow::before{ display:none; }
.eyebrow.heat{ color:var(--heat); }
.eyebrow.heat::before{ background:var(--heat); }

/* ---------- ambient wind canvas ---------- */
#wind-canvas{
  position:fixed; inset:0; z-index:0; pointer-events:none;
  mix-blend-mode:screen; opacity:0.55;
}

/* ---------- scroll progress ---------- */
.scroll-progress{
  position:fixed; top:calc(var(--nav-h) - 1px); left:0; height:1px; width:0%; z-index:101;
  background:linear-gradient(90deg, var(--wind), var(--heat));
  transition:width .08s linear;
}

/* ---------- nav ---------- */
.site-nav{
  position:fixed; top:0; left:0; right:0; z-index:100;
  backdrop-filter:blur(14px) saturate(140%);
  background:rgb(19, 20, 20);
  border-bottom:1px solid var(--line);
}
.site-nav .container{ display:flex; align-items:center; justify-content:space-between; height:var(--nav-h); }
.brand{ display:flex; align-items:center; gap:11px; }
.brand-word{ font-family:var(--display); font-weight:700; font-size:20px; letter-spacing:0.10em; }
.brand-word b{ color:var(--wind); font-weight:700; }

.nav-links{ display:flex; align-items:center; gap:4px; }
.nav-links a{
  font-family:var(--mono); font-size:13px; letter-spacing:0.03em;
  color:var(--text-muted); padding:9px 16px; border-radius:7px;
  transition:color .2s ease, background .2s ease;
  position:relative;
}
.nav-links a:hover{ color:var(--text); background:rgba(237,234,225,0.05); }
.nav-links a.active{ color:var(--wind); }
.nav-links a.active::after{
  content:""; position:absolute; left:16px; right:16px; bottom:3px; height:1px; background:var(--wind);
}

/* ---------- bouton Contact (CTA de la nav) ---------- */
/* La classe est portée par le <li> : nav_active() écrase l'attribut class du <a>. */
.nav-links .nav-cta > a{
  padding:9px 18px;
  border:1px solid var(--line-strong);
  border-radius:7px;
  color:var(--text);
  transition:background-color .25s ease, color .25s ease, border-color .25s ease;
}
.nav-links .nav-cta > a:hover,
.nav-links .nav-cta > a.active{
  background-color:var(--wind);
  color:var(--void);
  border-color:transparent;
}
/* le filet du lien actif ferait doublon à l'intérieur du bouton */
.nav-links .nav-cta > a.active::after{ display:none; }

/* ---------- dropdown "La Thèse" ---------- */
.nav-drop{ position:relative; }
.nav-drop > a{ display:flex; align-items:center; gap:6px; }
.nav-drop > a::after{
  content:"▾";
  font-size:14px; line-height:1; opacity:0.55;
  transition:transform .2s ease, opacity .2s ease;
}
.nav-drop:hover > a::after,
.nav-drop:focus-within > a::after{ opacity:1; transform:rotate(180deg); }

.nav-drop-menu{
  position:absolute; top:calc(100% + 10px); left:0; min-width:250px;
  background:var(--panel-2); border:1px solid var(--line-strong); border-radius:12px;
  padding:8px; opacity:0; pointer-events:none; transform:translateY(-6px);
  transition:opacity .18s ease, transform .18s ease;
  box-shadow:0 20px 40px rgba(0,0,0,0.4); z-index:50;
}
.nav-drop:hover .nav-drop-menu, .nav-drop:focus-within .nav-drop-menu{
  opacity:1; pointer-events:auto; transform:translateY(0);
}
.nav-drop-menu a{
  display:flex; flex-direction:column; gap:2px; padding:10px 14px !important; border-radius:8px;
}
.nav-drop-menu a .dn{ font-family:var(--body); font-size:13.5px; color:var(--text); }
.nav-drop-menu a .dd{ font-size:11px; color:var(--text-faint); font-family:var(--mono); }
.nav-drop-menu a:hover{ background:rgba(237,234,225,0.06); }
.nav-drop-menu a:hover .dn{ color:var(--wind); }
.nav-drop-menu .chapter-no{ font-family:var(--mono); color:var(--heat); font-size:11px; }

/* ---------- academic furniture ---------- */
.chapter-tag{
  display:inline-flex; align-items:center; gap:10px; font-family:var(--mono);
  font-size:12px; letter-spacing:.1em; text-transform:uppercase; color:var(--text-faint);
  padding-bottom:14px; margin-bottom:14px; border-bottom:1px solid var(--line);
}
.chapter-tag b{ color:var(--heat); font-weight:500; }
.source-note{
  font-family:var(--mono); font-size:11.5px; color:var(--text-faint); line-height:1.7;
  border-left:2px solid var(--line-strong); padding-left:14px; margin-top:10px;
}
.data-figure{
  font-family:var(--mono); font-size:11px; color:var(--wind); letter-spacing:.04em;
}
.measured{
  display:inline-flex; align-items:baseline; gap:6px; font-family:var(--mono);
  background:var(--wind-dim); border:1px solid rgba(242,165,60,0.3); border-radius:6px;
  padding:3px 9px; font-size:12.5px; color:var(--wind);
}
blockquote.thesis-quote{
  border-left:2px solid var(--heat); padding-left:22px; margin:0; font-family:var(--display);
  font-size:clamp(19px,2vw,24px); line-height:1.45; color:var(--text);
  font-weight:500; letter-spacing:-0.015em;
}
blockquote.thesis-quote cite{ display:block; margin-top:14px; font-family:var(--mono); font-style:normal; font-size:12px; color:var(--text-faint); }

.nav-toggle{
  display:none; width:40px; height:40px; border-radius:8px; border:1px solid var(--line);
  background:transparent; cursor:pointer; align-items:center; justify-content:center;
}
.nav-toggle span, .nav-toggle span::before, .nav-toggle span::after{
  content:""; display:block; width:18px; height:1.5px; background:var(--text); position:relative;
  transition:all .25s ease;
}
.nav-toggle span::before{ position:absolute; top:-6px; }
.nav-toggle span::after{ position:absolute; top:6px; }

/* ---------- buttons ---------- */
.btn{
  display:inline-flex; align-items:center; gap:9px;
  font-family:Inter; font-size:16px; letter-spacing:0.04em;
  padding:13px 22px; border:1px solid var(--line-strong);
  color:var(--text); transition:all .2s ease; white-space:nowrap;
}
.btn:hover{ border-color:var(--wind); color:var(--wind); background:var(--wind-dim); }
.btn-solid{
  background:#241300; color:#d19239; border-color:var(--wind); font-weight:500;
}
.btn-solid:hover{ background:#d19239; color:#241300; }
.btn-arrow{
  position:relative; display:inline-block; width:14px; height:11px; margin-left:2px;
  font-size:0; vertical-align:middle; transition:transform .2s ease;
}
.btn-arrow::before{
  content:""; position:absolute; left:0; top:50%; width:10px; height:1.6px;
  background:currentColor; transform:translateY(-50%);
}
.btn-arrow::after{
  content:""; position:absolute; right:0; top:50%;
  width:7px; height:7px; border-top:1.6px solid currentColor; border-right:1.6px solid currentColor;
  transform:translateY(-50%) rotate(45deg);
}
.btn:hover .btn-arrow{ transform:translateX(3px); }

/* ---------- page header (non-index pages) ---------- */
.page-hero{
  padding:168px 0 76px;
  position:relative;
  border-bottom:1px solid var(--line);
}
.page-hero h1{ font-size:clamp(38px,5.4vw,64px); line-height:1.05; margin-top:18px; max-width:820px; }
.page-hero .lede{ margin-top:20px; max-width:620px; color:var(--text-muted); font-size:17px; }

/* ---------- sections ---------- */
section{ position:relative; z-index:1; }
.section{ padding:96px 0; }
.section-head{ max-width:640px; margin-bottom:56px; }
.section-head h2{ font-size:clamp(28px,3.6vw,42px); margin-top:16px; }
.section-head p{ margin-top:16px; color:var(--text-muted); font-size:16px; }
.section-tight{ padding:56px 0; }
.divider{ height:1px; background:var(--line); border:0; margin:0; }

/* ---------- cards ---------- */
.card{
  background:var(--panel); border:1px solid var(--line); border-radius:14px;
  padding:30px; transition:border-color .25s ease, transform .25s ease, background .25s ease;
}
.card:hover{ border-color:var(--line-strong); transform:translateY(-3px); background:var(--panel-2); }

.nav-card{ display:block; }
.nav-card .idx{ font-family:var(--mono); font-size:13px; color:var(--wind); }
.nav-card h3{ font-size:22px; margin-top:14px; }
.nav-card p{ margin-top:10px; color:var(--text-muted); font-size:14.5px; }
.nav-card .go{ margin-top:22px; display:flex; align-items:center; gap:8px; font-family:var(--mono); font-size:12.5px; color:var(--text-faint); }
.nav-card:hover .go{ color:var(--wind); }
.nav-card .go span{
  position:relative; display:inline-block; width:13px; height:10px; margin-left:2px;
  font-size:0; vertical-align:middle; transition:transform .2s ease;
}
.nav-card .go span::before{
  content:""; position:absolute; left:0; top:50%; width:9px; height:1.4px;
  background:currentColor; transform:translateY(-50%);
}
.nav-card .go span::after{
  content:""; position:absolute; right:0; top:50%;
  width:6px; height:6px; border-top:1.4px solid currentColor; border-right:1.4px solid currentColor;
  transform:translateY(-50%) rotate(45deg);
}
.nav-card:hover .go span{ transform:translateX(3px); }

/* ---------- stat strip ---------- */
.stats{ display:grid; grid-template-columns:repeat(4,1fr); border-top:1px solid var(--line); border-bottom:1px solid var(--line); }
.stat{ padding:34px 28px; border-left:1px solid var(--line); }
.stat:first-child{ border-left:none; }
.stat .num{ font-family:var(--mono); font-size:clamp(26px,2.6vw,34px); color:var(--wind); }
.stat .label{ margin-top:8px; font-size:13px; color:var(--text-muted); letter-spacing:0.02em; }

/* ---------- figure / image captions ---------- */
figure{ margin:0; }
figure img{ border-radius:12px; border:1px solid var(--line); }
figcaption{
  margin-top:12px; font-family:var(--mono); font-size:12.5px; color:var(--text-faint);
  display:flex; gap:10px; align-items:baseline;
}
figcaption .tag{ color:var(--wind); }

/* ---------- footer ---------- */
.site-footer{ border-top:1px solid var(--line); padding:56px 0 34px; margin-top:40px; }
.footer-grid{ display:flex; justify-content:space-between; flex-wrap:wrap; gap:32px; }
.footer-col h4{ font-family:var(--mono); font-size:12px; letter-spacing:0.1em; text-transform:uppercase; color:var(--text-faint); margin-bottom:14px; }
.footer-col a, .footer-col p{ color:var(--text-muted); font-size:14px; display:block; padding:5px 0; }
.footer-col a:hover{ color:var(--wind); }
.footer-social{ display:flex; gap:14px; margin-top:16px; }
.footer-social a{ padding:0; font-family:var(--mono); font-size:11.5px; letter-spacing:.03em; text-decoration:underline; text-underline-offset:3px; text-decoration-color:var(--line-strong); }
.footer-social a:hover{ text-decoration-color:var(--wind); }
.footer-bottom{ margin-top:48px; padding-top:24px; border-top:1px solid var(--line); display:flex; justify-content:space-between; flex-wrap:wrap; gap:12px; font-family:var(--mono); font-size:12px; color:var(--text-faint); }

/* ---------- reveal on scroll ---------- */
.reveal{ opacity:0; transform:translateY(22px); transition:opacity .7s ease, transform .7s ease; }
.reveal.in{ opacity:1; transform:translateY(0); }

/* ---------- responsive ---------- */

/* Palier intermédiaire : la barre se resserre, le menu reste horizontal.
   Entre 1001px et 1240px on garde les liens visibles au lieu de basculer. */
@media (max-width:1240px){
  .nav-links{ gap:0; }
  .nav-links a{ font-size:12px; padding:9px 11px; letter-spacing:0.01em; }
  .nav-links a.active::after{ left:11px; right:11px; }
  .nav-links .nav-cta > a{ padding:8px 13px; }
  .brand-word{ font-size:18px; }
  .site-nav .container{ padding:0 22px; }

  .stats{ grid-template-columns:repeat(2,1fr); }
  .stat{ border-left:none; border-top:1px solid var(--line); }
  .stat:nth-child(2){ border-left:1px solid var(--line); }
  .stat:nth-child(4){ border-left:1px solid var(--line); }

  /* Filet de sécurité : toute grille inline (2, 3 ou 4 colonnes) passe à 2 colonnes */
  [style*="grid-template-columns"]{ grid-template-columns:repeat(2,1fr) !important; }
}

/* Bascule hamburger — seuil abaissé de 1240px à 1000px */
@media (max-width:1000px){
  .nav-links{
    position:fixed; top:var(--nav-h); left:0; right:0; bottom:0; height:calc(100vh - var(--nav-h));
    background:rgba(10,13,18,0.98); backdrop-filter:blur(10px);
    flex-direction:column; align-items:stretch; padding:12px 28px; gap:0;
    transform:translateY(-8px); opacity:0; pointer-events:none;
    transition:opacity .2s ease, transform .2s ease;
    overflow-y:auto;
  }
  .nav-links.open{ opacity:1; transform:translateY(0); pointer-events:auto; }
  .nav-links a{
    display:block; width:100%; box-sizing:border-box;
    padding:22px 4px; border-bottom:1px solid var(--line);
    font-family:var(--display); font-size:22px; font-weight:500; letter-spacing:-0.02em;
  }
  .nav-links a.active::after{ display:none; }
  .nav-toggle{ display:flex; }
  .brand-word{ font-size:20px; }
  .site-nav .container{ padding:0 32px; }

  /* le CTA redevient un lien de liste : la bordure du bouton jure en plein écran */
  .nav-links .nav-cta > a{
    border:none; border-bottom:1px solid var(--line);
    border-radius:0; padding:22px 4px; background:none;
  }
  .nav-links .nav-cta > a:hover,
  .nav-links .nav-cta > a.active{ background:none; color:var(--wind); }

  .nav-drop-menu{
    position:static; opacity:1; pointer-events:auto; transform:none; box-shadow:none;
    background:transparent; border:none; padding:6px 0 10px 12px; display:none;
  }
  .nav-drop.open .nav-drop-menu{ display:block; }
  .nav-drop > a::after{ margin-left:auto; font-size:18px; }
  .nav-drop.open > a::after{ transform:rotate(180deg); }
  .nav-drop-menu a{
    border-bottom:none !important; padding:14px 10px !important;
    font-family:var(--body) !important; font-size:16px !important; font-weight:400 !important;
  }
  .nav-drop-menu a .dn{ font-size:16px; }
  .nav-drop-menu a .dd{ font-size:12px; margin-top:2px; }
}

@media (max-width:640px){
  .container{ padding:0 24px; }
  .page-hero{ padding:140px 0 56px; }
  .section{ padding:64px 0; }
  .stats{ grid-template-columns:1fr; }
  .stat{ border-left:none !important; }

  /* Filet de sécurité : toute grille inline repasse à 1 colonne */
  [style*="grid-template-columns"]{ grid-template-columns:1fr !important; }

  /* Les boutons longs (ex. "Chapitre suivant — ...") passent à la ligne au lieu de déborder */
  .btn{ white-space:normal; text-align:center; }
  .hero-actions .btn{ width:100%; justify-content:center; }
}

/* ---------- accessibilité : mouvement réduit ---------- */
@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; }
  #wind-canvas{ display:none; }
}
#compass-arrow{
  transform-box: view-box;
  transform-origin: 210px 210px;
  transition: transform .35s cubic-bezier(.22,1,.36,1);
}