/* ═══════════════════════════════════════
   INSTITUT DES MARGES SAHARIENNES — STYLE PARTAGÉ
═══════════════════════════════════════ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

:root {
  --sand:       #e8d4ae;
  --sand-light: #faf6ee;
  --sand-dark:  #c9a86a;
  --indigo:     #17284a;
  --indigo-2:   #223a68;
  --terracotta: #c1440e;
  --terracotta-dark: #9a350a;
  --ink:        #241d15;
  --gray:       #5b5346;
  --border:     #e3d7bf;
  --white:      #ffffff;
  --green:      #3f6b4a;
  --serif:      'Georgia', 'Iowan Old Style', 'Times New Roman', serif;
  --sans:       'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
  --shadow:     0 6px 24px rgba(23,40,74,.08);
}

body {
  font-family: var(--sans);
  color: var(--ink);
  background: var(--sand-light);
  line-height: 1.65;
  font-size: 16px;
}
a { color: inherit; text-decoration: none; }
img { display: block; width: 100%; height: 100%; object-fit: cover; }
button, input, textarea, select { font-family: inherit; }
button { cursor: pointer; border: none; background: none; }
ul { list-style: none; }
h1, h2, h3, h4 { font-family: var(--serif); line-height: 1.25; color: var(--indigo); }

.wrap { max-width: 1180px; margin: 0 auto; padding: 0 1.25rem; }
.section { padding: 4rem 0; }
.section-alt { background: var(--sand); }
.section-indigo { background: var(--indigo); color: var(--sand-light); }
.section-indigo h2, .section-indigo h3 { color: var(--white); }

.eyebrow {
  font-family: var(--sans); font-size: .74rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: .14em; color: var(--terracotta);
  display: block; margin-bottom: .6rem;
}
.section-indigo .eyebrow { color: var(--sand-dark); }

h2.title { font-size: 2.1rem; margin-bottom: .5rem; }
p.lead { font-size: 1.08rem; color: var(--gray); max-width: 720px; }
.section-indigo p.lead { color: #c9d2e4; }

/* ── Skip link ── */
.skip-link {
  position: absolute; left: -999px; top: 0; background: var(--terracotta); color: #fff;
  padding: .6rem 1rem; z-index: 999; border-radius: 0 0 6px 0;
}
.skip-link:focus { left: 0; }

/* ═══════════════════════════════════════
   TOPBAR
═══════════════════════════════════════ */
.topbar {
  background: var(--indigo); color: #b9c3da; font-size: .76rem; padding: .45rem 0;
}
.topbar-inner {
  max-width: 1180px; margin: auto; padding: 0 1.25rem;
  display: flex; justify-content: space-between; align-items: center; gap: 1rem; flex-wrap: wrap;
}
.topbar-inner a { color: #b9c3da; }
.topbar-inner a:hover { color: var(--sand-dark); }
.topbar-links { display: flex; gap: 1.25rem; }

/* ═══════════════════════════════════════
   HEADER / NAV
═══════════════════════════════════════ */
.site-header {
  background: var(--white); border-bottom: 3px solid var(--terracotta);
  position: sticky; top: 0; z-index: 200;
}
.header-inner {
  max-width: 1180px; margin: auto; padding: .9rem 1.25rem;
  display: flex; align-items: center; justify-content: space-between; gap: 1.5rem;
}
.logo-wrap { display: flex; align-items: center; gap: .7rem; }
.logo-mark {
  width: 46px; height: 46px; border-radius: 50%;
  background: linear-gradient(135deg, var(--terracotta), var(--sand-dark));
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-family: var(--serif); font-weight: 700; font-size: 1.3rem;
  flex-shrink: 0;
}
.logo-text-name { font-family: var(--serif); font-weight: 700; font-size: 1.28rem; color: var(--indigo); line-height: 1.1; }
.logo-text-tag { font-size: .66rem; text-transform: uppercase; letter-spacing: .1em; color: var(--gray); }

.main-nav { display: flex; align-items: center; gap: 1.6rem; }
.main-nav a {
  font-size: .88rem; font-weight: 600; color: var(--ink); padding: .3rem 0;
  border-bottom: 2px solid transparent; white-space: nowrap;
}
.main-nav a:hover, .main-nav a.active { color: var(--terracotta); border-bottom-color: var(--terracotta); }

.nav-cta {
  background: var(--terracotta); color: #fff !important; padding: .55rem 1.15rem !important;
  border-radius: 24px; border-bottom: none !important;
}
.nav-cta:hover { background: var(--terracotta-dark) !important; }

.nav-toggle {
  display: none; flex-direction: column; gap: 5px; padding: .4rem; z-index: 210;
}
.nav-toggle span { width: 26px; height: 2px; background: var(--indigo); display: block; }

@media (max-width: 900px) {
  .nav-toggle { display: flex; }
  .main-nav {
    position: fixed; inset: 0 0 0 auto; width: min(320px, 85vw); height: 100vh;
    background: var(--white); flex-direction: column; align-items: flex-start;
    padding: 5.5rem 1.75rem 2rem; gap: 1.25rem; box-shadow: -8px 0 30px rgba(0,0,0,.15);
    transform: translateX(100%); transition: transform .3s ease;
  }
  .main-nav.open { transform: translateX(0); }
  .nav-cta { margin-top: .5rem; }
  .nav-overlay {
    display: none; position: fixed; inset: 0; background: rgba(23,40,74,.4); z-index: 199;
  }
  .nav-overlay.open { display: block; }
}

/* ═══════════════════════════════════════
   HERO
═══════════════════════════════════════ */
.hero {
  background: var(--indigo);
  color: var(--sand-light);
  padding: 5rem 0 4.5rem;
  background-image:
    radial-gradient(circle at 12% 30%, rgba(193,68,14,.25), transparent 45%),
    radial-gradient(circle at 90% 80%, rgba(201,168,106,.18), transparent 50%);
}
.hero .wrap { display: grid; grid-template-columns: 1.1fr .9fr; gap: 3rem; align-items: center; }
.hero h1 { color: #fff; font-size: 2.6rem; margin-bottom: 1rem; }
.hero p { color: #c9d2e4; font-size: 1.08rem; max-width: 540px; margin-bottom: 1.75rem; }
.hero-art {
  aspect-ratio: 4/3; border-radius: 14px; overflow: hidden;
  background: linear-gradient(160deg, var(--sand-dark), var(--terracotta) 70%);
  display: flex; align-items: center; justify-content: center;
  border: 1px solid rgba(255,255,255,.15);
}
.hero-art svg { width: 60%; height: 60%; opacity: .9; }
@media (max-width: 900px) {
  .hero .wrap { grid-template-columns: 1fr; }
  .hero-art { order: -1; max-width: 420px; margin: 0 auto; }
}

/* ═══════════════════════════════════════
   BUTTONS
═══════════════════════════════════════ */
.btn {
  display: inline-flex; align-items: center; gap: .5rem;
  padding: .75rem 1.5rem; border-radius: 26px; font-weight: 700; font-size: .9rem;
  transition: background .2s, color .2s, border-color .2s;
}
.btn-primary { background: var(--terracotta); color: #fff; }
.btn-primary:hover { background: var(--terracotta-dark); }
.btn-outline { border: 1.5px solid var(--sand-light); color: var(--sand-light); }
.btn-outline:hover { background: rgba(255,255,255,.1); }
.btn-outline-dark { border: 1.5px solid var(--indigo); color: var(--indigo); }
.btn-outline-dark:hover { background: var(--indigo); color: #fff; }
.btn-block { width: 100%; justify-content: center; }
.btn:disabled { opacity: .6; cursor: not-allowed; }

/* ═══════════════════════════════════════
   CARDS (générique)
═══════════════════════════════════════ */
.grid { display: grid; gap: 1.75rem; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
@media (max-width: 980px) { .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 620px) { .grid-3, .grid-4, .grid-2 { grid-template-columns: 1fr; } }

.card {
  background: var(--white); border: 1px solid var(--border); border-radius: 12px;
  overflow: hidden; box-shadow: var(--shadow); display: flex; flex-direction: column;
  transition: transform .18s ease, box-shadow .18s ease;
}
.card:hover { transform: translateY(-3px); box-shadow: 0 12px 30px rgba(23,40,74,.14); }
.card-media {
  aspect-ratio: 16/10; background: linear-gradient(135deg, var(--sand), var(--sand-dark));
  display: flex; align-items: center; justify-content: center; position: relative;
}
.card-tag {
  position: absolute; top: .7rem; left: .7rem; background: var(--terracotta); color: #fff;
  font-size: .68rem; font-weight: 700; text-transform: uppercase; letter-spacing: .06em;
  padding: .3rem .65rem; border-radius: 20px;
}
.card-body { padding: 1.25rem 1.4rem 1.5rem; display: flex; flex-direction: column; flex: 1; }
.card-meta { font-size: .74rem; color: var(--gray); margin-bottom: .4rem; text-transform: uppercase; letter-spacing: .05em; }
.card-body h3 { font-size: 1.15rem; margin-bottom: .55rem; }
.card-body p { color: var(--gray); font-size: .92rem; flex: 1; }
.card-link { margin-top: 1rem; font-size: .84rem; font-weight: 700; color: var(--terracotta); }
.card-link:hover { text-decoration: underline; }

/* ═══════════════════════════════════════
   FILTER / SEARCH BAR (utilisé sur plusieurs pages)
═══════════════════════════════════════ */
.filterbar {
  display: flex; gap: .85rem; flex-wrap: wrap; align-items: center;
  background: var(--white); border: 1px solid var(--border); border-radius: 12px;
  padding: 1rem 1.25rem; margin-bottom: 2.25rem; box-shadow: var(--shadow);
}
.filterbar input[type="search"], .filterbar select {
  padding: .6rem .9rem; border: 1px solid var(--border); border-radius: 8px;
  font-size: .88rem; background: var(--sand-light); color: var(--ink);
}
.filterbar input[type="search"] { flex: 1; min-width: 200px; }
.filter-chips { display: flex; gap: .5rem; flex-wrap: wrap; }
.chip {
  padding: .4rem .95rem; border-radius: 20px; font-size: .8rem; font-weight: 600;
  border: 1.5px solid var(--border); color: var(--gray); background: var(--white);
}
.chip.active { background: var(--indigo); color: #fff; border-color: var(--indigo); }
.chip:hover { border-color: var(--terracotta); }
.result-count { font-size: .85rem; color: var(--gray); margin-bottom: 1.25rem; }
.empty-state { text-align: center; padding: 3rem 1rem; color: var(--gray); }

/* ═══════════════════════════════════════
   FORMS
═══════════════════════════════════════ */
.form-grid { display: grid; gap: 1.15rem; }
.field label { display: block; font-size: .82rem; font-weight: 700; margin-bottom: .4rem; color: var(--indigo); }
.field input, .field textarea, .field select {
  width: 100%; padding: .75rem .9rem; border: 1.5px solid var(--border); border-radius: 8px;
  font-size: .95rem; background: var(--white); color: var(--ink);
}
.field input:focus, .field textarea:focus, .field select:focus { outline: 2px solid var(--terracotta); outline-offset: 1px; }
.field textarea { resize: vertical; min-height: 120px; }
.field-error { color: var(--terracotta-dark); font-size: .78rem; margin-top: .3rem; display: none; }
.field.invalid input, .field.invalid textarea { border-color: var(--terracotta-dark); }
.field.invalid .field-error { display: block; }
.form-note { font-size: .8rem; color: var(--gray); margin-top: .75rem; }
.form-success {
  display: none; background: #eaf3ec; border: 1px solid var(--green); color: #234a2d;
  padding: 1rem 1.25rem; border-radius: 10px; margin-top: 1.25rem; font-size: .92rem;
}
.form-success.show { display: block; }

/* ═══════════════════════════════════════
   MODAL
═══════════════════════════════════════ */
.modal-overlay {
  display: none; position: fixed; inset: 0; background: rgba(23,40,74,.55);
  z-index: 500; align-items: center; justify-content: center; padding: 1.5rem;
}
.modal-overlay.open { display: flex; }
.modal-box {
  background: #fff; border-radius: 14px; max-width: 560px; width: 100%;
  max-height: 85vh; overflow-y: auto; padding: 2rem; position: relative;
  box-shadow: 0 20px 60px rgba(0,0,0,.3);
}
.modal-close {
  position: absolute; top: 1rem; right: 1rem; font-size: 1.3rem; color: var(--gray);
  width: 32px; height: 32px; border-radius: 50%; display: flex; align-items: center; justify-content: center;
}
.modal-close:hover { background: var(--sand-light); color: var(--indigo); }

/* ═══════════════════════════════════════
   FOOTER
═══════════════════════════════════════ */
.site-footer { background: var(--indigo); color: #b9c3da; padding: 3.5rem 0 1.5rem; margin-top: 3rem; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: 2.5rem; margin-bottom: 2.5rem; }
.footer-grid h4 { color: #fff; font-size: .95rem; margin-bottom: 1rem; font-family: var(--sans); }
.footer-grid a { display: block; color: #b9c3da; font-size: .87rem; margin-bottom: .6rem; }
.footer-grid a:hover { color: var(--sand-dark); }
.footer-about p { font-size: .87rem; color: #9fadc7; margin-top: .75rem; max-width: 300px; }
.footer-social { display: flex; gap: .75rem; margin-top: 1rem; }
.footer-social a {
  width: 34px; height: 34px; border-radius: 50%; border: 1px solid #3a4d75;
  display: flex; align-items: center; justify-content: center; font-size: .85rem;
}
.footer-social a:hover { background: var(--terracotta); border-color: var(--terracotta); color: #fff; }
.footer-bottom {
  border-top: 1px solid #2c3f66; padding-top: 1.25rem; font-size: .78rem; color: #7f8fb0;
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: .75rem;
}
@media (max-width: 900px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 560px) { .footer-grid { grid-template-columns: 1fr; } }

/* ═══════════════════════════════════════
   BREADCRUMB / PAGE HEADER
═══════════════════════════════════════ */
.page-hero {
  background: var(--indigo); color: #fff; padding: 3rem 0 2.5rem;
}
.page-hero .wrap { max-width: 900px; }
.breadcrumb { font-size: .78rem; color: #9fadc7; margin-bottom: .75rem; }
.breadcrumb a:hover { color: var(--sand-dark); }
.page-hero h1 { color: #fff; font-size: 2.1rem; margin-bottom: .6rem; }
.page-hero p { color: #c9d2e4; max-width: 640px; }

/* ═══════════════════════════════════════
   STATS
═══════════════════════════════════════ */
.stats-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.5rem; text-align: center; }
.stat-num { font-family: var(--serif); font-size: 2.4rem; font-weight: 700; color: var(--terracotta); }
.stat-label { font-size: .82rem; color: var(--gray); text-transform: uppercase; letter-spacing: .05em; margin-top: .3rem; }
@media (max-width: 700px) { .stats-row { grid-template-columns: repeat(2, 1fr); } }

/* ═══════════════════════════════════════
   TEAM
═══════════════════════════════════════ */
.team-card { text-align: center; cursor: pointer; }
.team-photo {
  width: 120px; height: 120px; border-radius: 50%; margin: 0 auto 1rem;
  background: linear-gradient(135deg, var(--sand-dark), var(--terracotta));
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-family: var(--serif); font-size: 1.8rem; font-weight: 700;
}
.team-name { font-weight: 700; color: var(--indigo); }
.team-role { font-size: .82rem; color: var(--terracotta); margin-top: .2rem; }

/* ═══════════════════════════════════════
   TIMELINE (événements / historique)
═══════════════════════════════════════ */
.timeline { position: relative; padding-left: 2rem; border-left: 2px solid var(--border); }
.timeline-item { position: relative; margin-bottom: 2rem; }
.timeline-item::before {
  content: ""; position: absolute; left: -2.44rem; top: .3rem;
  width: 12px; height: 12px; border-radius: 50%; background: var(--terracotta);
  border: 3px solid var(--sand-light);
}
.timeline-year { font-weight: 700; color: var(--terracotta); font-size: .85rem; }

/* ═══════════════════════════════════════
   UTIL
═══════════════════════════════════════ */
.text-center { text-align: center; }
.mt-2 { margin-top: 2rem; }
.mb-2 { margin-bottom: 2rem; }
.flex-between { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 1rem; }
.tag-list { display: flex; gap: .5rem; flex-wrap: wrap; }
.tag-pill {
  background: var(--sand); color: var(--indigo); font-size: .72rem; font-weight: 700;
  padding: .3rem .7rem; border-radius: 20px; text-transform: uppercase; letter-spacing: .04em;
}
.pagination { display: flex; justify-content: center; gap: .5rem; margin-top: 2.5rem; }
.pagination button {
  width: 38px; height: 38px; border-radius: 8px; border: 1px solid var(--border);
  background: var(--white); font-weight: 700; color: var(--indigo);
}
.pagination button.active { background: var(--indigo); color: #fff; border-color: var(--indigo); }
.pagination button:hover:not(.active) { border-color: var(--terracotta); }

.back-link { display: inline-flex; align-items: center; gap: .4rem; font-weight: 700; color: var(--terracotta); font-size: .88rem; margin-bottom: 1.5rem; }
.back-link:hover { text-decoration: underline; }

.social-share { display: flex; gap: .6rem; }
.social-share button {
  width: 36px; height: 36px; border-radius: 50%; border: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center; color: var(--indigo);
}
.social-share button:hover { background: var(--terracotta); color: #fff; border-color: var(--terracotta); }

.toast {
  position: fixed; bottom: 1.5rem; right: 1.5rem; background: var(--indigo); color: #fff;
  padding: .9rem 1.4rem; border-radius: 10px; box-shadow: 0 10px 30px rgba(0,0,0,.25);
  z-index: 600; font-size: .88rem; transform: translateY(30px); opacity: 0; pointer-events: none;
  transition: all .3s ease;
}
.toast.show { transform: translateY(0); opacity: 1; }