/* ============================================
   HFSM Muséographie — style.css
   ============================================ */

/* --- Reset & base --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --noir:    #0f172a;
  --texte:   #374151;
  --gris:    #6b7280;
  --bordure: #e5e7eb;
  --fond:    #f9fafb;
  --blanc:   #ffffff;
  --accent:  #1d4ed8;
  --accent-h:#1e40af;
  --radius:  6px;
  --ombre:   0 1px 3px rgba(0,0,0,.08), 0 4px 16px rgba(0,0,0,.06);
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  font-size: 16px;
  line-height: 1.65;
  color: var(--texte);
  background: var(--blanc);
  -webkit-font-smoothing: antialiased;
}

img { display: block; max-width: 100%; height: auto; }
a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-h); }

/* --- Typographie --- */
h1, h2, h3, h4 {
  color: var(--noir);
  line-height: 1.25;
  font-weight: 700;
  letter-spacing: -0.02em;
}
h1 { font-size: clamp(2rem, 4vw, 3rem); }
h2 { font-size: clamp(1.4rem, 2.5vw, 1.9rem); margin-bottom: 1rem; }
h3 { font-size: 1.15rem; margin-bottom: .5rem; }
p  { margin-bottom: 1rem; }
p:last-child { margin-bottom: 0; }

/* --- Layout --- */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

section { padding: 5rem 0; }
section + section { border-top: 1px solid var(--bordure); }

/* --- Navigation --- */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--bordure);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.nav-logo {
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--noir);
  letter-spacing: -0.03em;
}
.nav-logo span { color: var(--accent); }
.nav-logo:hover { color: var(--noir); }

.nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
}

.nav-links a {
  color: var(--texte);
  font-size: .9rem;
  font-weight: 500;
  transition: color .2s;
}
.nav-links a:hover, .nav-links a.active { color: var(--accent); }

/* Mobile menu */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: .4rem;
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--noir);
  margin: 5px 0;
  transition: .3s;
}

/* --- Hero --- */
.hero {
  padding: 6rem 0 5rem;
  border-top: none;
}

.hero-tag {
  display: inline-block;
  font-size: .8rem;
  font-weight: 600;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--accent);
  background: #eff6ff;
  padding: .3rem .75rem;
  border-radius: 20px;
  margin-bottom: 1.5rem;
}

.hero h1 { max-width: 700px; margin-bottom: 1.25rem; }

.hero-sub {
  font-size: 1.15rem;
  color: var(--gris);
  max-width: 560px;
  margin-bottom: 2.5rem;
  line-height: 1.7;
}

.hero-ctas { display: flex; gap: 1rem; flex-wrap: wrap; }

/* --- Boutons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  padding: .75rem 1.5rem;
  border-radius: var(--radius);
  font-size: .9rem;
  font-weight: 600;
  transition: all .2s;
  cursor: pointer;
}

.btn-primary {
  background: var(--accent);
  color: var(--blanc);
  border: 2px solid var(--accent);
}
.btn-primary:hover {
  background: var(--accent-h);
  border-color: var(--accent-h);
  color: var(--blanc);
}

.btn-secondary {
  background: transparent;
  color: var(--noir);
  border: 2px solid var(--bordure);
}
.btn-secondary:hover {
  border-color: var(--noir);
  color: var(--noir);
}

/* --- Section titre --- */
.section-label {
  font-size: .78rem;
  font-weight: 600;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: .75rem;
}

/* --- Grille de projets --- */
.projets-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 2rem;
  margin-top: 2.5rem;
}

.projet-card {
  border: 1px solid var(--bordure);
  border-radius: 10px;
  overflow: hidden;
  background: var(--blanc);
  transition: box-shadow .25s, transform .25s;
  text-decoration: none;
  display: block;
  color: inherit;
}

.projet-card:hover {
  box-shadow: var(--ombre);
  transform: translateY(-3px);
  color: inherit;
}

.projet-card-img {
  width: 100%;
  height: 220px;
  object-fit: cover;
  background: var(--fond);
}

.projet-card-body { padding: 1.25rem 1.4rem 1.5rem; }

.projet-card-tag {
  font-size: .75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--accent);
  margin-bottom: .4rem;
}

.projet-card h3 {
  font-size: 1rem;
  margin-bottom: .5rem;
  color: var(--noir);
}

.projet-card p {
  font-size: .88rem;
  color: var(--gris);
  line-height: 1.55;
  margin-bottom: 0;
}

.projet-card-footer {
  padding: .9rem 1.4rem;
  border-top: 1px solid var(--bordure);
  font-size: .82rem;
  color: var(--gris);
  display: flex;
  gap: .5rem;
  flex-wrap: wrap;
}

.partenaire-tag {
  background: var(--fond);
  padding: .2rem .6rem;
  border-radius: 20px;
  font-size: .78rem;
}

/* --- Savoir-faire (blocs) --- */
.savoir-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 1.5rem;
  margin-top: 2.5rem;
}

.savoir-item {
  padding: 1.5rem;
  border: 1px solid var(--bordure);
  border-radius: 10px;
  background: var(--blanc);
}

.savoir-icon {
  font-size: 1.6rem;
  margin-bottom: .75rem;
}

.savoir-item h3 {
  font-size: .95rem;
  margin-bottom: .4rem;
}

.savoir-item p {
  font-size: .85rem;
  color: var(--gris);
  line-height: 1.55;
}

/* --- À propos (homepage) --- */
.apropos-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.apropos-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin-top: 2rem;
}

.stat-bloc {
  padding: 1.25rem;
  background: var(--fond);
  border-radius: var(--radius);
  border: 1px solid var(--bordure);
}

.stat-bloc strong {
  display: block;
  font-size: 1.6rem;
  color: var(--noir);
  letter-spacing: -0.03em;
}

.stat-bloc span {
  font-size: .82rem;
  color: var(--gris);
}

/* --- Page projet (détail) --- */
.projet-hero {
  padding: 4rem 0 3rem;
}

.projet-hero-img {
  width: 100%;
  max-height: 500px;
  object-fit: cover;
  border-radius: 10px;
  margin-top: 2rem;
}

.projet-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
  margin: 2rem 0;
  padding: 1.5rem;
  background: var(--fond);
  border-radius: var(--radius);
  border: 1px solid var(--bordure);
}

.meta-item { }
.meta-item dt {
  font-size: .75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .07em;
  color: var(--gris);
  margin-bottom: .2rem;
}
.meta-item dd { font-size: .9rem; color: var(--noir); font-weight: 500; }

.projet-content {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 4rem;
  align-items: start;
}

.projet-content h2 { font-size: 1.3rem; margin-top: 2rem; margin-bottom: .75rem; }
.projet-content h2:first-child { margin-top: 0; }

.projet-sidebar {
  position: sticky;
  top: 80px;
}

.sidebar-bloc {
  padding: 1.25rem;
  border: 1px solid var(--bordure);
  border-radius: 10px;
  margin-bottom: 1.25rem;
}

.sidebar-bloc h4 {
  font-size: .8rem;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--gris);
  margin-bottom: .75rem;
}

.sidebar-bloc ul {
  list-style: none;
  font-size: .88rem;
}

.sidebar-bloc li {
  padding: .3rem 0;
  border-bottom: 1px solid var(--bordure);
  color: var(--texte);
}
.sidebar-bloc li:last-child { border-bottom: none; }

.gallery {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1rem;
  margin-top: 1.5rem;
}

.gallery img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  border-radius: var(--radius);
  border: 1px solid var(--bordure);
}

/* --- CTA bande --- */
.cta-band {
  background: var(--noir);
  color: var(--blanc);
  padding: 4rem 0;
  text-align: center;
  border-top: none;
}

.cta-band h2 { color: var(--blanc); margin-bottom: 1rem; }
.cta-band p { color: #94a3b8; margin-bottom: 2rem; max-width: 500px; margin-left: auto; margin-right: auto; }

.btn-white {
  background: var(--blanc);
  color: var(--noir);
  border: 2px solid var(--blanc);
}
.btn-white:hover { background: #f1f5f9; color: var(--noir); }

/* --- Contact --- */
.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 4rem;
  align-items: start;
}

.contact-info p { font-size: .95rem; margin-bottom: 1.5rem; }

.contact-link {
  display: flex;
  align-items: center;
  gap: .6rem;
  font-size: .9rem;
  color: var(--texte);
  margin-bottom: .75rem;
  font-weight: 500;
}
.contact-link:hover { color: var(--accent); }

form { display: flex; flex-direction: column; gap: 1rem; }

label { font-size: .85rem; font-weight: 600; color: var(--noir); display: block; margin-bottom: .3rem; }

input, textarea, select {
  width: 100%;
  padding: .75rem 1rem;
  border: 1px solid var(--bordure);
  border-radius: var(--radius);
  font-size: .9rem;
  font-family: inherit;
  color: var(--texte);
  background: var(--blanc);
  transition: border-color .2s;
}

input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(29,78,216,.1);
}

textarea { min-height: 130px; resize: vertical; }

/* --- Footer --- */
.footer {
  padding: 2.5rem 0;
  border-top: 1px solid var(--bordure);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-logo {
  font-size: .95rem;
  font-weight: 800;
  color: var(--noir);
  letter-spacing: -0.02em;
}

.footer-links {
  display: flex;
  gap: 1.5rem;
  list-style: none;
}

.footer-links a {
  font-size: .82rem;
  color: var(--gris);
}
.footer-links a:hover { color: var(--accent); }

.footer-copy {
  font-size: .8rem;
  color: var(--gris);
  width: 100%;
  text-align: center;
  margin-top: .5rem;
}

/* --- Breadcrumb --- */
.breadcrumb {
  display: flex;
  gap: .5rem;
  align-items: center;
  font-size: .82rem;
  color: var(--gris);
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}
.breadcrumb a { color: var(--gris); }
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb-sep { color: var(--bordure); }

/* --- Responsive --- */
@media (max-width: 768px) {
  section { padding: 3.5rem 0; }

  .nav-links { display: none; flex-direction: column; position: absolute; top: 64px; left: 0; right: 0; background: var(--blanc); border-bottom: 1px solid var(--bordure); padding: 1rem 1.5rem 1.5rem; gap: 1rem; }
  .nav-links.open { display: flex; }
  .nav-toggle { display: block; }
  .nav { position: relative; }

  .hero { padding: 3.5rem 0 3rem; }
  .apropos-layout { grid-template-columns: 1fr; gap: 2rem; }
  .projet-content { grid-template-columns: 1fr; }
  .projet-sidebar { position: static; }
  .contact-layout { grid-template-columns: 1fr; }
  .footer-inner { flex-direction: column; align-items: flex-start; }
  .projets-grid { grid-template-columns: 1fr; }
  .savoir-grid { grid-template-columns: 1fr 1fr; }
  .apropos-stats { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 480px) {
  .savoir-grid { grid-template-columns: 1fr; }
  .hero-ctas { flex-direction: column; }
  .btn { justify-content: center; }
}