/* =========================================================
   Gaia Technology — Feuille de style
   Design provisoire (à harmoniser avec la charte définitive)
   Thème CLAIR : institutionnel, aéré, aurora vert-teal-bleu
   ========================================================= */

:root {
  /* Base claire */
  --bg:        #F7FAFC;
  --bg-2:      #FFFFFF;
  --surface:   #FFFFFF;
  --surface-2: #F1F5F9;
  --border:    rgba(15, 23, 42, 0.09);
  --border-2:  rgba(15, 23, 42, 0.16);

  /* Texte */
  --text:      #0B1220;
  --text-soft: #45526B;
  --text-dim:  #6B7789;

  /* Accents (déclinés « ink » foncés pour le contraste sur fond clair) */
  --teal:  #0D9488;
  --green: #059669;
  --blue:  #2563EB;
  --accent: var(--teal);
  --grad: linear-gradient(120deg, #0D9488 0%, #059669 45%, #2563EB 100%);
  --grad-soft: linear-gradient(120deg, rgba(13,148,136,.10), rgba(37,99,235,.10));

  /* Ombres */
  --shadow-sm: 0 1px 2px rgba(16,24,40,.05), 0 1px 3px rgba(16,24,40,.06);
  --shadow:    0 12px 30px -14px rgba(16,24,40,.20);
  --shadow-lg: 0 24px 50px -18px rgba(16,24,40,.28);

  /* Système */
  --radius:    18px;
  --radius-sm: 12px;
  --radius-lg: 26px;
  --maxw: 1180px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --font-display: 'Space Grotesk', 'Segoe UI', system-ui, sans-serif;
  --font-body: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .001ms !important; transition-duration: .001ms !important; }
}

body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  font-size: 16px;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }

.container { width: 100%; max-width: var(--maxw); margin-inline: auto; padding-inline: 24px; }

.skip-link {
  position: fixed; top: -60px; left: 16px; z-index: 200;
  background: var(--text); color: #fff; padding: 10px 16px; border-radius: 10px;
  transition: top .2s;
}
.skip-link:focus { top: 16px; }

/* ---------- Ambient background (pastel, léger) ---------- */
.aurora { position: fixed; inset: 0; z-index: -2; overflow: hidden; background:
  radial-gradient(1200px 800px at 78% -12%, rgba(37,99,235,.10), transparent 60%),
  radial-gradient(1000px 720px at 6% 4%, rgba(13,148,136,.12), transparent 55%),
  radial-gradient(900px 700px at 50% 108%, rgba(5,150,105,.08), transparent 60%),
  var(--bg);
}
.blob { position: absolute; border-radius: 50%; filter: blur(100px); opacity: .38; }
.blob--1 { width: 42vw; height: 42vw; top: -8%; left: 58%; background: radial-gradient(circle, #7fe3d6, transparent 66%); animation: float1 22s var(--ease) infinite alternate; }
.blob--2 { width: 36vw; height: 36vw; top: 28%; left: -6%; background: radial-gradient(circle, #9dc0ff, transparent 66%); animation: float2 26s var(--ease) infinite alternate; }
.blob--3 { width: 28vw; height: 28vw; top: 62%; left: 62%; background: radial-gradient(circle, #9be7bf, transparent 66%); animation: float1 30s var(--ease) infinite alternate-reverse; }
@keyframes float1 { to { transform: translate(-6%, 8%) scale(1.1); } }
@keyframes float2 { to { transform: translate(8%, -6%) scale(1.15); } }

.grid-overlay {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(15,23,42,.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(15,23,42,.04) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 30%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 30%, transparent 80%);
}

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  transition: background .3s, border-color .3s, backdrop-filter .3s, box-shadow .3s;
  border-bottom: 1px solid transparent;
}
.site-header.scrolled {
  background: rgba(255, 255, 255, 0.78);
  backdrop-filter: blur(16px) saturate(160%);
  -webkit-backdrop-filter: blur(16px) saturate(160%);
  border-bottom-color: var(--border);
  box-shadow: 0 6px 24px -18px rgba(16,24,40,.4);
}
.nav { display: flex; align-items: center; justify-content: space-between; height: 74px; gap: 24px; }
.brand { color: var(--text); flex-shrink: 0; }
.brand img { height: 40px; width: auto; }

.nav-links { display: flex; gap: 6px; }
.nav-links a {
  color: var(--text-soft); font-size: 14.5px; font-weight: 500;
  padding: 9px 14px; border-radius: 10px; transition: color .2s, background .2s;
}
.nav-links a:hover { color: var(--text); background: var(--surface-2); }

.nav-actions { display: flex; align-items: center; gap: 12px; }

.nav-toggle { display: none; background: var(--surface); border: 1px solid var(--border); border-radius: 10px; width: 42px; height: 42px; cursor: pointer; padding: 0; flex-direction: column; gap: 4px; align-items: center; justify-content: center; }
.nav-toggle span { width: 18px; height: 2px; background: var(--text); border-radius: 2px; transition: transform .3s, opacity .3s; }
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

.mobile-menu {
  display: flex; flex-direction: column; gap: 4px; padding: 12px 24px 22px;
  background: rgba(255,255,255,.96); backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border); box-shadow: var(--shadow);
}
/* Respecte l'attribut hidden : masqué par défaut, ne s'ouvre qu'au hamburger (mobile) */
.mobile-menu[hidden] { display: none; }
.mobile-menu a { color: var(--text-soft); padding: 12px 8px; border-radius: 10px; font-weight: 500; }
.mobile-menu a:hover { background: var(--surface-2); color: var(--text); }
.mobile-menu .btn { margin-top: 8px; justify-content: center; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font-family: var(--font-display); font-weight: 600; font-size: 15px; letter-spacing: -0.01em;
  padding: 12px 22px; border-radius: 999px; border: 1px solid transparent;
  cursor: pointer; transition: transform .18s var(--ease), box-shadow .25s, background .25s, border-color .25s; white-space: nowrap;
}
.btn--sm { padding: 9px 18px; font-size: 14px; }
.btn--lg { padding: 15px 28px; font-size: 16px; }
.btn--block { width: 100%; }
.btn--primary { background: var(--grad); color: #fff; box-shadow: 0 10px 26px -10px rgba(13,148,136,.6); }
.btn--primary:hover { transform: translateY(-2px); box-shadow: 0 16px 34px -10px rgba(13,148,136,.7); }
.btn--ghost { background: var(--surface); color: var(--text); border-color: var(--border-2); box-shadow: var(--shadow-sm); }
.btn--ghost:hover { background: var(--surface-2); transform: translateY(-2px); border-color: var(--teal); }

/* ---------- Sections ---------- */
.section { padding: clamp(40px, 5.5vw, 76px) 0; position: relative; }
.section-tag {
  display: inline-block; font-family: var(--font-display); font-size: 13px; font-weight: 600;
  letter-spacing: .14em; text-transform: uppercase; color: var(--teal);
  padding: 6px 14px; border: 1px solid var(--border-2); border-radius: 999px;
  background: var(--grad-soft); margin-bottom: 20px;
}
.section-tag--light { color: var(--teal); }
.section-title { font-family: var(--font-display); font-weight: 700; letter-spacing: -0.025em; line-height: 1.12; font-size: clamp(26px, 3.6vw, 42px); }
.section-head { max-width: 720px; margin-bottom: 38px; }
.section-head .section-title { margin-top: 4px; }

.grad-text { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }

/* ---------- Hero ---------- */
.hero { padding: clamp(80px, 13vw, 150px) 0 clamp(48px, 7vw, 90px); }
.hero__inner { max-width: 900px; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 9px; font-size: 13.5px; font-weight: 500;
  color: var(--text-soft); padding: 7px 16px; border: 1px solid var(--border);
  border-radius: 999px; background: rgba(255,255,255,.7); backdrop-filter: blur(8px); box-shadow: var(--shadow-sm); margin-bottom: 26px;
}
.eyebrow .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--green); box-shadow: 0 0 0 0 rgba(5,150,105,.6); animation: pulse 2.4s infinite; }
@keyframes pulse { 0% { box-shadow: 0 0 0 0 rgba(5,150,105,.5); } 70% { box-shadow: 0 0 0 9px rgba(5,150,105,0); } 100% { box-shadow: 0 0 0 0 rgba(5,150,105,0); } }

.hero__title { font-family: var(--font-display); font-weight: 700; letter-spacing: -0.03em; line-height: 1.05; font-size: clamp(38px, 6.4vw, 74px); margin-bottom: 26px; }
.hero__subtitle { font-size: clamp(16px, 2.1vw, 20px); color: var(--text-soft); max-width: 640px; margin-bottom: 38px; }
.hero__cta { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 64px; }

.hero__stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; max-width: 780px; }
.stat { padding: 22px 20px; border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); box-shadow: var(--shadow-sm); transition: border-color .3s, transform .3s, box-shadow .3s; }
.stat:hover { border-color: var(--border-2); transform: translateY(-3px); box-shadow: var(--shadow); }
.stat__num { display: block; font-family: var(--font-display); font-size: clamp(26px, 3.4vw, 34px); font-weight: 700; letter-spacing: -0.02em; background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.stat__label { display: block; font-size: 13.5px; color: var(--text-dim); margin-top: 4px; }

/* ---------- Marquee ---------- */
.marquee { overflow: hidden; border-block: 1px solid var(--border); padding: 20px 0; background: rgba(255,255,255,.5); -webkit-mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent); mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent); }
.marquee__track { display: flex; gap: 30px; width: max-content; animation: scroll 38s linear infinite; }
.marquee__track span { font-family: var(--font-display); font-size: 16px; font-weight: 500; color: var(--text-dim); white-space: nowrap; }
.marquee__track span:nth-child(even) { color: var(--teal); }
@keyframes scroll { to { transform: translateX(-50%); } }
.marquee:hover .marquee__track { animation-play-state: paused; }

/* ---------- À propos ---------- */
.about { display: grid; grid-template-columns: 1.15fr 0.85fr; gap: 56px; align-items: start; }
.about__text p { color: var(--text-soft); margin-top: 18px; }
.about__text strong { color: var(--text); font-weight: 600; }
.about__cards { display: flex; flex-direction: column; gap: 16px; position: sticky; top: 100px; }
.mini-card { padding: 24px; border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); box-shadow: var(--shadow-sm); transition: border-color .3s, transform .3s, box-shadow .3s; }
.mini-card:hover { border-color: var(--border-2); transform: translateX(4px); box-shadow: var(--shadow); }
.mini-card__icon { font-size: 22px; color: var(--teal); margin-bottom: 10px; }
.mini-card h3 { font-family: var(--font-display); font-size: 17px; font-weight: 600; margin-bottom: 6px; }
.mini-card p { font-size: 14.5px; color: var(--text-dim); }

/* ---------- Bento / Expertises ---------- */
.bento { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.card { position: relative; padding: 32px; border: 1px solid var(--border); border-radius: var(--radius-lg); background: var(--surface); box-shadow: var(--shadow-sm); overflow: hidden; transition: border-color .35s, transform .35s, box-shadow .35s; }
.card::before { content: ""; position: absolute; inset: 0; border-radius: inherit; padding: 1.5px; background: var(--grad); -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0); -webkit-mask-composite: xor; mask-composite: exclude; opacity: 0; transition: opacity .35s; pointer-events: none; }
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.card:hover::before { opacity: 1; }
.card--wide { grid-column: span 2; }
.card__num { font-family: var(--font-display); font-size: 13px; font-weight: 600; color: var(--teal); letter-spacing: .1em; margin-bottom: 14px; }
.card h3 { font-family: var(--font-display); font-size: clamp(19px, 2.2vw, 23px); font-weight: 600; letter-spacing: -0.02em; line-height: 1.2; margin-bottom: 12px; }
.card > p { color: var(--text-soft); font-size: 15px; margin-bottom: 18px; }
.card__list { list-style: none; display: grid; gap: 9px; }
.card--wide .card__list { grid-template-columns: 1fr 1fr; }
.card__list li { position: relative; padding-left: 22px; color: var(--text-dim); font-size: 14.5px; }
.card__list li::before { content: "›"; position: absolute; left: 4px; color: var(--green); font-weight: 700; }

/* ---------- Feature band / Innovation ---------- */
.feature-band { position: relative; border: 1px solid var(--border); border-radius: var(--radius-lg); padding: clamp(36px, 6vw, 72px); overflow: hidden; background: linear-gradient(160deg, rgba(13,148,136,.07), rgba(37,99,235,.06)); box-shadow: var(--shadow); }
.feature-band__glow { position: absolute; width: 500px; height: 500px; border-radius: 50%; background: radial-gradient(circle, rgba(5,150,105,.20), transparent 62%); filter: blur(40px); top: -180px; right: -120px; }
.feature-band__content { position: relative; max-width: 760px; }
.feature-band p { color: var(--text-soft); font-size: clamp(16px, 2vw, 19px); margin-top: 8px; }
.feature-band strong { color: var(--text); }
.pill-row { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.pill { font-family: var(--font-display); font-size: 14.5px; font-weight: 500; padding: 10px 18px; border-radius: 999px; border: 1px solid var(--border-2); background: rgba(255,255,255,.7); box-shadow: var(--shadow-sm); }

/* ---------- Secteurs ---------- */
.sectors { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.sector { display: flex; align-items: center; gap: 14px; padding: 20px 24px; border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); box-shadow: var(--shadow-sm); font-weight: 500; font-size: 15.5px; transition: border-color .3s, transform .3s, box-shadow .3s; }
.sector:hover { border-color: var(--border-2); transform: translateY(-2px); box-shadow: var(--shadow); }
.sector__ico { font-size: 22px; flex-shrink: 0; }
.sector:last-child:nth-child(odd) { grid-column: span 2; }

/* ---------- Steps / Approche ---------- */
.steps { list-style: none; display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; counter-reset: s; }
.step { padding: 28px 24px; border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); box-shadow: var(--shadow-sm); position: relative; transition: border-color .3s, transform .3s, box-shadow .3s; }
.step:hover { border-color: var(--border-2); transform: translateY(-4px); box-shadow: var(--shadow); }
.step__idx { font-family: var(--font-display); font-size: 30px; font-weight: 700; background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; display: block; margin-bottom: 14px; }
.step h3 { font-family: var(--font-display); font-size: 17.5px; font-weight: 600; margin-bottom: 8px; }
.step p { font-size: 14.5px; color: var(--text-dim); }

/* ---------- Clients & partenaires (bandeau défilant) ---------- */
.logos-marquee {
  overflow: hidden;
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 6%, #000 94%, transparent);
  mask-image: linear-gradient(90deg, transparent, #000 6%, #000 94%, transparent);
}
.logos-track { display: flex; gap: 16px; width: max-content; animation: scroll 36s linear infinite; }
.logos-marquee:hover .logos-track { animation-play-state: paused; }
.logo-item {
  flex: 0 0 220px; display: grid; place-items: center; min-height: 108px; padding: 22px 26px;
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  box-shadow: var(--shadow-sm); overflow: hidden;
  transition: transform .3s var(--ease), box-shadow .3s, border-color .3s;
}
.logo-item:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: var(--border-2); }
.logo-item img { max-height: 60px; width: auto; max-width: 100%; object-fit: contain; }

/* ---------- Contact ---------- */
.contact { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: start; }
.contact__intro p { color: var(--text-soft); margin-top: 6px; }
.contact__coords { list-style: none; margin-top: 30px; display: grid; gap: 14px; }
.contact__coords li { display: flex; align-items: center; gap: 14px; color: var(--text-soft); font-size: 15px; }
.contact__coords a:hover { color: var(--teal); }
.contact__coords em { color: var(--text-dim); font-size: 13px; font-style: italic; }
.contact__ico { width: 40px; height: 40px; display: grid; place-items: center; border: 1px solid var(--border); border-radius: 12px; background: var(--surface); box-shadow: var(--shadow-sm); flex-shrink: 0; }

.contact__form { padding: clamp(24px, 4vw, 36px); border: 1px solid var(--border); border-radius: var(--radius-lg); background: var(--surface); box-shadow: var(--shadow); display: grid; gap: 18px; }
.field { display: grid; gap: 8px; }
.field label { font-size: 13.5px; font-weight: 500; color: var(--text-soft); }
.field input, .field select, .field textarea {
  font-family: var(--font-body); font-size: 15px; color: var(--text);
  background: #fff; border: 1px solid var(--border-2); border-radius: 12px;
  padding: 13px 15px; transition: border-color .2s, box-shadow .2s; width: 100%; resize: vertical;
}
.field input:focus, .field select:focus, .field textarea:focus { outline: none; border-color: var(--teal); box-shadow: 0 0 0 3px rgba(13,148,136,.14); }
.field input::placeholder, .field textarea::placeholder { color: var(--text-dim); }
.field select option { background: #fff; color: var(--text); }
.form-note { font-size: 14px; text-align: center; min-height: 20px; color: var(--green); }
.form-note.error { color: #dc2626; }

/* ---------- Footer ---------- */
.site-footer { border-top: 1px solid var(--border); margin-top: 40px; padding-top: 64px; background: linear-gradient(0deg, rgba(241,245,249,.8), transparent); }
.footer { display: grid; grid-template-columns: 1.3fr 1fr; gap: 48px; padding-bottom: 48px; }
.footer__brand img { height: 42px; margin-bottom: 16px; }
.footer__brand p { color: var(--text-dim); font-size: 15px; max-width: 320px; }
.footer__coords { list-style: none; margin-top: 18px; display: grid; gap: 8px; }
.footer__coords li { color: var(--text-soft); font-size: 14px; max-width: 340px; }
.footer__coords a:hover { color: var(--teal); }
.footer__nav { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; }
.footer__nav h4 { font-family: var(--font-display); font-size: 13px; text-transform: uppercase; letter-spacing: .1em; color: var(--text); margin-bottom: 16px; }
.footer__nav a { display: block; color: var(--text-dim); font-size: 14.5px; padding: 5px 0; transition: color .2s; }
.footer__nav a:hover { color: var(--teal); }
.footer__bottom { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px; padding: 24px 24px 40px; border-top: 1px solid var(--border); font-size: 13.5px; color: var(--text-dim); }

/* ---------- Reveal animations ---------- */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
.reveal.in { opacity: 1; transform: none; }
.reveal:nth-child(2) { transition-delay: .05s; }
.reveal:nth-child(3) { transition-delay: .1s; }
.reveal:nth-child(4) { transition-delay: .15s; }

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .nav-links { display: none; }
  .nav-toggle { display: flex; }
  .about, .contact { grid-template-columns: 1fr; gap: 36px; }
  .about__cards { position: static; }
  .bento { grid-template-columns: 1fr; }
  .card--wide { grid-column: span 1; }
  .card--wide .card__list { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr 1fr; }
  .footer { grid-template-columns: 1fr; gap: 32px; }
}
@media (max-width: 560px) {
  .container { padding-inline: 18px; }
  .hero__stats { grid-template-columns: 1fr 1fr; }
  .sectors { grid-template-columns: 1fr; }
  .sector:last-child:nth-child(odd) { grid-column: span 1; }
  .steps { grid-template-columns: 1fr; }
  .footer__nav { grid-template-columns: 1fr 1fr; }
  .nav-actions .btn--sm { display: none; }
}