/* ==========================================================================
   Kaowinn — bootstrap.css
   Design system minimal : variables, reset, typographie, composants de base.
   Sert aussi de maquette simplifiée avant intégration finale (cf. CDC §3).
   ========================================================================== */

:root {
  /* Couleurs de marque — Violet Tech & Créatif */
  --color-primary: #7c3aed;        /* Violet carte — Identité, titres, boutons forts */
  --color-primary-light: #9353d3;  /* Violet clair — Hovers & badges */
  --color-primary-dark: #5b21b6;   /* Violet sombre — États actifs & gradients */
  
  --color-accent: #ff6b4a;         /* Corail — Conservé pour les CTA secondaires ou alertes */
  --color-accent-dark: #e0523a;
  --color-success: #1fb87a;

  /* Neutres enrichis d'une touche de violet (au lieu du gris froid) */
  --color-ink: #0f172a;            /* Fond très sombre / Texte principal */
  --color-body: #475569;
  --color-muted: #64748b;
  --color-line: #e2e8f0;
  --color-surface: #ffffff;
  --color-surface-alt: #faf5ff;    /* Teinte violette très douce pour les sections alternées */

  /* Typo, Espacements & Layout inchangés */
  --font-base: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-size-base: 1rem;
  --line-height-base: 1.6;

  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2rem;
  --space-5: 3rem;
  --space-6: 4.5rem;
  --space-7: 6rem;

  --container-max: 1180px;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 24px;
  
  /* Ombres teintées en violet pour plus de caractère */
  --shadow-sm: 0 2px 8px rgba(124, 58, 237, 0.06);
  --shadow-md: 0 12px 32px rgba(124, 58, 237, 0.12);
  --shadow-lg: 0 24px 64px rgba(124, 58, 237, 0.18);

  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --transition-fast: 0.2s var(--ease);
  --transition-base: 0.4s var(--ease);
  --transition-slow: 0.8s var(--ease);
}

/* --- Reset --------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }
/* Pas de scroll-behavior:smooth global : combiné à la restauration de scroll
   du navigateur entre deux pages, ça produisait un "saut" visible à l'arrivée
   sur une nouvelle page. Le scroll doux est géré au cas par cas en JS (main.js)
   uniquement pour les ancres internes volontaires (ex. #wizard). */
body {
  margin: 0;
  font-family: var(--font-base);
  font-size: var(--font-size-base);
  line-height: var(--line-height-base);
  color: var(--color-body);
  background: var(--color-surface);
  -webkit-font-smoothing: antialiased;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul, ol { margin: 0; padding: 0; list-style: none; }
button { font: inherit; cursor: pointer; border: none; background: none; }
input, textarea, select { font: inherit; }

/* --- Typographie ---------------------------------------------------------- */
h1, h2, h3, h4 { color: var(--color-ink); line-height: 1.15; margin: 0 0 var(--space-2); font-weight: 800; }
h1 { font-size: clamp(2.2rem, 5vw, 3.4rem); letter-spacing: -0.02em; }
h2 { font-size: clamp(1.7rem, 3.5vw, 2.4rem); letter-spacing: -0.01em; }
h3 { font-size: 1.25rem; }
p { margin: 0 0 var(--space-2); }
.text-muted { color: var(--color-muted); }
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-accent-dark);
  margin-bottom: var(--space-2);
}

/* --- Layout ---------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--space-3);
}
.section { padding-block: var(--space-6); }
.section-alt { background: var(--color-surface-alt); }
.grid { display: grid; gap: var(--space-3); }
@media (min-width: 768px) {
  .grid-2 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(3, 1fr); }
  .grid-4 { grid-template-columns: repeat(4, 1fr); }
}
.stack { display: flex; flex-direction: column; }
.cluster { display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-2); }

/* --- Boutons --------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5em;
  padding: 0.9em 1.6em;
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: 0.98rem;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), background-color var(--transition-fast);
  white-space: nowrap;
}
.btn:active { transform: translateY(1px); }
.btn-primary {
  background: var(--color-accent);
  color: #fff;
  box-shadow: var(--shadow-sm);
}
.btn-primary:hover { background: var(--color-accent-dark); box-shadow: var(--shadow-md); transform: translateY(-2px); }
.btn-secondary {
  background: var(--color-primary);
  color: #fff;
}
.btn-secondary:hover { background: var(--color-primary-dark); transform: translateY(-2px); }
.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border: 1.5px solid var(--color-line);
}
.btn-outline:hover { border-color: var(--color-primary); background: var(--color-surface-alt); }
.btn-outline--light { color: #fff; border-color: rgba(255, 255, 255, 0.55); }
.btn-outline--light:hover { border-color: #fff; background: rgba(255, 255, 255, 0.12); }
.btn-block { width: 100%; }
.btn-sm { padding: 0.6em 1.1em; font-size: 0.88rem; }

/* --- Cards ------------------------------------------------------------------ */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  padding: var(--space-3);
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}
.card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); border-color: transparent; }

/* --- Badges ------------------------------------------------------------------ */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
  padding: 0.35em 0.85em;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 700;
  background: var(--color-surface-alt);
  color: var(--color-primary);
  border: 1px solid var(--color-line);
}
.badge-accent { background: rgba(255, 107, 74, 0.12); color: var(--color-accent-dark); border-color: transparent; }

/* --- Formulaires -------------------------------------------------------------- */
.field { margin-bottom: var(--space-2); text-align: left; }
.field label { display: block; font-weight: 600; font-size: 0.9rem; margin-bottom: 0.4em; color: var(--color-ink); }
.field input, .field textarea, .field select {
  width: 100%;
  padding: 0.8em 1em;
  border: 1.5px solid var(--color-line);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  transition: border-color var(--transition-fast);
}
.field input:focus, .field textarea:focus, .field select:focus {
  outline: none;
  border-color: var(--color-primary);
}

/* --- Animations : révélation au scroll --------------------------------------- */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}
.reveal.is-visible { opacity: 1; transform: translateY(0); }
.reveal-delay-1 { transition-delay: 0.08s; }
.reveal-delay-2 { transition-delay: 0.16s; }
.reveal-delay-3 { transition-delay: 0.24s; }
.reveal-delay-4 { transition-delay: 0.32s; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal, .card, .btn { transition: none !important; transform: none !important; opacity: 1 !important; }
  * { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; }
}

@media (max-width: 767px) {
  .section { padding-block: var(--space-5); }
}

/* --- Sections sombres (contraste, cf. retour "trop épuré") ------------------- */
.section-dark {
  background: var(--color-ink);
  color: #c7c9d9;
}
.section-dark h2, .section-dark h3 { color: #fff; }
.section-dark .text-muted { color: #9a9db3; }
.section-dark .eyebrow { color: var(--color-accent); }

/* --- Hero de page : image de fond + overlay couleur + texte -----------------
   Utilisé par le hero de l'accueil et le bandeau d'intro de chaque page
   interne, pour une identité visuelle cohérente sur tout le site. */
.page-hero {
  position: relative;
  display: flex;
  align-items: center;
  overflow: hidden;
  color: #fff;
}
.page-hero__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 0;
}
.page-hero__overlay {
  position: absolute;
  inset: 0;
  z-index: 1;
  background: linear-gradient(120deg, rgba(43, 58, 103, 0.92), rgba(43, 58, 103, 0.72));
}
.page-hero__content {
  position: relative;
  z-index: 2;
  width: 100%;
}
.page-hero .eyebrow { color: #ffb199; }
.page-hero h1, .page-hero h2 { color: #fff; }
.page-hero .text-muted { color: rgba(255, 255, 255, 0.8); }

/* --- Cadre image générique (photos, galerie) --------------------------------- */
.media-frame {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  background: var(--color-surface-alt);
}
.media-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform var(--transition-slow);
}