/* =========================================================
   3D SIS — Design system
   Néon sur fond sombre : bleu électrique (signature) + orange néon (accent)
   Typos : Orbitron (titres) · Inter (texte) · JetBrains Mono (détails)
   ========================================================= */

:root {
  --bg:        #060914;
  --bg-2:      #0b1120;
  --bg-3:      #111a2e;
  --panel:     rgba(255, 255, 255, 0.03);
  --border:    rgba(120, 160, 255, 0.14);
  --border-2:  rgba(120, 160, 255, 0.28);

  --blue:      #2b8cff;
  --blue-soft: #5aa6ff;
  --blue-glow: rgba(43, 140, 255, 0.45);

  --orange:    #ff5500;
  --orange-2:  #ff7a2f;
  --orange-glow: rgba(255, 85, 0, 0.45);

  --text:      #e9eef9;
  --muted:     #93a0bd;
  --muted-2:   #6c7794;

  --radius:    16px;
  --radius-sm: 10px;
  --maxw:      1180px;
  --ease:      cubic-bezier(0.22, 1, 0.36, 1);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* Halo de fond global */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(900px 500px at 12% -5%, rgba(43, 140, 255, 0.16), transparent 60%),
    radial-gradient(800px 500px at 95% 8%, rgba(255, 85, 0, 0.10), transparent 55%),
    radial-gradient(700px 600px at 50% 110%, rgba(43, 140, 255, 0.10), transparent 60%);
}

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

h1, h2, h3, .mark {
  font-family: 'Orbitron', sans-serif;
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: 0.5px;
}

.container { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
.section { padding: 96px 0; }
.section-sm { padding: 64px 0; }

.eyebrow {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.8rem;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--blue-soft);
  margin-bottom: 14px;
}

.section-head { max-width: 720px; margin: 0 auto 56px; text-align: center; }
.section-head h2 { font-size: clamp(1.7rem, 3.4vw, 2.6rem); }
.section-head p { color: var(--muted); margin-top: 14px; font-size: 1.05rem; }

.text-orange { color: var(--orange-2); }
.text-blue { color: var(--blue-soft); }

/* ---------- Wordmark "- = 3D SIS = -" ---------- */
.mark { font-size: 1.25rem; white-space: nowrap; }
.mark .deco {
  color: var(--orange);
  font-weight: 500;
  text-shadow: 0 0 12px var(--orange-glow);
}
.mark .name {
  background: linear-gradient(180deg, #ffffff, var(--blue-soft));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ---------- Boutons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: 'Orbitron', sans-serif;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  padding: 14px 26px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease), background 0.25s;
}
.btn-primary {
  background: linear-gradient(120deg, var(--orange), var(--orange-2));
  color: #fff;
  box-shadow: 0 8px 30px var(--orange-glow);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 40px var(--orange-glow); }
.btn-ghost {
  background: var(--panel);
  border-color: var(--border-2);
  color: var(--text);
}
.btn-ghost:hover { border-color: var(--blue); box-shadow: 0 0 24px var(--blue-glow); transform: translateY(-2px); }

/* ---------- Header / Nav ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(6, 9, 20, 0.72);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.nav-brand { display: flex; align-items: center; gap: 11px; }
.brand-mark { width: 34px; height: 34px; flex-shrink: 0; }
.nav-brand .mark { font-size: 1.15rem; }
.nav-links { display: flex; align-items: center; gap: 6px; }
.nav-links a {
  font-size: 0.92rem;
  color: var(--muted);
  padding: 8px 14px;
  border-radius: 8px;
  transition: color 0.2s, background 0.2s;
}
.nav-links a:hover { color: var(--text); background: var(--panel); }
.nav-links a.active { color: var(--blue-soft); }
.nav-links .btn { margin-left: 8px; padding: 10px 18px; }
.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border-2);
  border-radius: 8px;
  padding: 8px 10px;
  cursor: pointer;
}
.nav-toggle span { display: block; width: 22px; height: 2px; background: var(--text); margin: 4px 0; transition: 0.3s; }

/* ---------- Hero ---------- */
.hero { position: relative; padding: 110px 0 90px; overflow: hidden; }
.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 56px;
  align-items: center;
}
.hero h1 {
  font-size: clamp(2.4rem, 5.6vw, 4rem);
  margin-bottom: 20px;
}
.hero h1 .mark { font-size: inherit; display: inline; }
.hero-sub { font-size: 1.15rem; color: var(--muted); max-width: 540px; margin-bottom: 22px; }
.hero-tagline {
  font-family: 'JetBrains Mono', monospace;
  color: var(--blue-soft);
  letter-spacing: 1px;
  margin-bottom: 32px;
}
.hero-cta { display: flex; gap: 14px; flex-wrap: wrap; }
.hero-visual {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border-2);
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.5), 0 0 60px var(--blue-glow);
}
.hero-visual img { width: 100%; }

.badges { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 30px; }
.badge {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.78rem;
  color: var(--muted);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 7px 14px;
  background: var(--panel);
}
.badge b { color: var(--blue-soft); }

/* ---------- Cartes (3 univers) ---------- */
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.card {
  position: relative;
  background: linear-gradient(180deg, var(--bg-2), var(--bg-3));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform 0.3s var(--ease), border-color 0.3s, box-shadow 0.3s;
}
.card:hover { transform: translateY(-6px); border-color: var(--border-2); box-shadow: 0 24px 60px rgba(0,0,0,0.45), 0 0 40px var(--blue-glow); }
.card-media { aspect-ratio: 16 / 10; overflow: hidden; }
.card-media img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s var(--ease); }
.card:hover .card-media img { transform: scale(1.06); }
.card-body { padding: 24px; }
.card-body h3 { font-size: 1.25rem; margin-bottom: 10px; }
.card-body p { color: var(--muted); font-size: 0.96rem; margin-bottom: 18px; }
.card-link {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.85rem;
  color: var(--orange-2);
  letter-spacing: 1px;
}
.card-tag {
  position: absolute; top: 16px; left: 16px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.7rem; letter-spacing: 2px; text-transform: uppercase;
  background: rgba(6,9,20,0.7); border: 1px solid var(--border-2);
  padding: 5px 10px; border-radius: 999px; color: var(--blue-soft);
}

/* ---------- Bande d'atouts ---------- */
.features { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.feature {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 28px 22px;
}
.feature .num {
  font-family: 'Orbitron', sans-serif;
  font-size: 2rem;
  color: var(--blue-soft);
  text-shadow: 0 0 24px var(--blue-glow);
}
.feature h4 { font-family: 'Inter', sans-serif; font-size: 1rem; margin: 10px 0 6px; }
.feature p { color: var(--muted); font-size: 0.9rem; }

/* ---------- Listes / contenu générique ---------- */
.prose { max-width: 820px; }
.prose p { color: var(--muted); margin-bottom: 18px; }
.prose ul { list-style: none; margin: 18px 0; }
.prose li { position: relative; padding-left: 28px; margin-bottom: 12px; color: var(--muted); }
.prose li::before { content: "▸"; position: absolute; left: 0; color: var(--orange-2); }

/* ---------- Bande CTA ---------- */
.cta-band {
  text-align: center;
  background: linear-gradient(120deg, rgba(43,140,255,0.10), rgba(255,85,0,0.10));
  border: 1px solid var(--border-2);
  border-radius: var(--radius);
  padding: 56px 32px;
}
.cta-band h2 { font-size: clamp(1.6rem, 3.2vw, 2.3rem); margin-bottom: 14px; }
.cta-band p { color: var(--muted); margin-bottom: 28px; }
.devis-note {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: 'JetBrains Mono', monospace; font-size: 0.85rem;
  color: var(--blue-soft); margin-top: 18px;
}

/* ---------- Formulaire ---------- */
.form-grid { max-width: 720px; margin: 0 auto; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.field { margin-bottom: 18px; }
.field label { display: block; font-size: 0.85rem; color: var(--muted); margin-bottom: 8px; }
.field label .req { color: var(--orange-2); }
.field input, .field select, .field textarea {
  width: 100%;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 13px 15px;
  color: var(--text);
  font-family: inherit;
  font-size: 0.95rem;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none; border-color: var(--blue); box-shadow: 0 0 0 3px var(--blue-glow);
}
.field textarea { min-height: 140px; resize: vertical; }
.field-consent { display: flex; align-items: flex-start; gap: 12px; }
.field-consent input { width: auto; margin-top: 5px; }
.field-consent label { margin: 0; font-size: 0.85rem; }
.form-hint { font-size: 0.82rem; color: var(--muted-2); margin-top: 6px; }

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--border);
  background: var(--bg-2);
  padding: 56px 0 28px;
  margin-top: 40px;
}
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 40px; margin-bottom: 36px; }
.footer-grid h5 {
  font-family: 'Orbitron', sans-serif; font-size: 0.9rem; letter-spacing: 1px;
  margin-bottom: 16px; color: var(--text);
}
.footer-grid p, .footer-grid a { color: var(--muted); font-size: 0.92rem; }
.footer-links { display: flex; flex-direction: column; gap: 10px; }
.footer-links a:hover { color: var(--blue-soft); }
.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 22px;
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px;
  font-size: 0.84rem; color: var(--muted-2);
}

/* ---------- Animations d'apparition ---------- */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity 0.7s var(--ease), transform 0.7s var(--ease); }
.reveal.in { opacity: 1; transform: none; }

/* ---------- Page hero compact (pages internes) ---------- */
.page-hero { padding: 80px 0 48px; text-align: center; }
.page-hero h1 { font-size: clamp(2rem, 4.4vw, 3rem); margin-bottom: 16px; }
.page-hero p { color: var(--muted); max-width: 640px; margin: 0 auto; font-size: 1.08rem; }

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero-visual { order: -1; }
  .cards { grid-template-columns: 1fr; }
  .features { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .form-row { grid-template-columns: 1fr; }
  .nav-links {
    position: fixed; inset: 72px 0 auto 0;
    flex-direction: column; align-items: stretch; gap: 0;
    background: var(--bg-2); border-bottom: 1px solid var(--border);
    padding: 12px; transform: translateY(-130%); transition: transform 0.35s var(--ease);
  }
  .nav-links.open { transform: none; }
  .nav-links a { padding: 14px; }
  .nav-links .btn { margin: 8px 0 0; justify-content: center; }
  .nav-toggle { display: block; }
}
@media (max-width: 520px) {
  .features { grid-template-columns: 1fr; }
  .section { padding: 64px 0; }
}