/* ═══════════════════════════════════════════════════════════════════════════
   RTAR-web — Feuille de style principale
   Design : sobre, académique, responsive mobile-first
   Palette :  Navy  #1c3d5a  |  Terre cuite #b85c38  |  Parchemin #f5f2ec
              Texte #2b2b2b  |  Gris doux   #6b7280  |  Fond blanc #ffffff
   ═══════════════════════════════════════════════════════════════════════════ */

/* ── Variables ─────────────────────────────────────────────────────────────── */
:root {
  --c-navy:       #1c3d5a;
  --c-navy-dark:  #122840;
  --c-navy-light: #2a5278;
  --c-terra:      #b85c38;
  --c-terra-light:#d4724e;
  --c-parchment:  #f5f2ec;
  --c-bg:         #ffffff;
  --c-text:       #2b2b2b;
  --c-muted:      #6b7280;
  --c-border:     #d8d3ca;
  --c-focus:      #3b82f6;
  --c-success:    #16a34a;
  --c-error:      #dc2626;

  --font-sans:  'Segoe UI', system-ui, -apple-system, sans-serif;
  --font-serif: Georgia, 'Times New Roman', serif;

  --radius-sm:  4px;
  --radius-md:  8px;
  --radius-lg:  12px;

  --shadow-sm: 0 1px 3px rgba(0,0,0,.10);
  --shadow-md: 0 4px 12px rgba(0,0,0,.12);
  --shadow-lg: 0 8px 24px rgba(0,0,0,.14);

  --max-w: 1100px;
  --header-h: 64px;
}

/* ── Reset ─────────────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--c-text);
  background: var(--c-parchment);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--c-navy); text-decoration: underline; text-underline-offset: 3px; }
a:hover { color: var(--c-terra); }

/* ── Accessibilité ─────────────────────────────────────────────────────────── */
.skip-link {
  position: absolute; top: -100%; left: 1rem;
  padding: .4rem .8rem; background: var(--c-navy); color: #fff;
  border-radius: var(--radius-sm); font-size: .9rem; z-index: 9999;
  text-decoration: none;
}
.skip-link:focus { top: .5rem; }
:focus-visible { outline: 3px solid var(--c-focus); outline-offset: 2px; }

/* ── Header ────────────────────────────────────────────────────────────────── */
.site-header {
  background: var(--c-navy);
  color: #fff;
  height: var(--header-h);
  position: sticky; top: 0; z-index: 100;
  box-shadow: var(--shadow-md);
}
.site-header__inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 1.25rem;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
.site-header__logo {
  display: flex; align-items: center; gap: .75rem;
  text-decoration: none; color: inherit;
  flex-shrink: 0;
}
.site-header__logo img { border-radius: 4px; }
.site-header__titles { display: flex; flex-direction: column; }
.site-header__name {
  font-size: 1.15rem; font-weight: 700; line-height: 1.2; letter-spacing: .02em;
}
.site-header__subtitle {
  font-size: .7rem; color: rgba(255,255,255,.7); line-height: 1.2;
}
.site-nav { display: flex; gap: .25rem; }
.site-nav__link {
  padding: .4rem .75rem; border-radius: var(--radius-sm);
  color: rgba(255,255,255,.85); text-decoration: none;
  font-size: .9rem; transition: background .15s, color .15s;
}
.site-nav__link:hover { background: rgba(255,255,255,.12); color: #fff; }
.site-nav__link.active { background: var(--c-terra); color: #fff; }

/* ── Main / page wrapper ───────────────────────────────────────────────────── */
main { flex: 1; }
.page {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 2rem 1.25rem;
}
.page-title {
  font-family: var(--font-serif);
  font-size: 1.6rem;
  color: var(--c-navy);
  margin-bottom: 1.5rem;
  padding-bottom: .6rem;
  border-bottom: 2px solid var(--c-terra);
}
.page-intro {
  color: var(--c-muted);
  margin-bottom: 2rem;
  max-width: 70ch;
}

/* ── Carte générique ───────────────────────────────────────────────────────── */
.card {
  background: var(--c-bg);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}
.card__body { padding: 1.5rem; }

/* ── Formulaire de recherche ───────────────────────────────────────────────── */
.search-form { display: flex; flex-direction: column; gap: 1.25rem; }

.form-section {
  border: 1px solid var(--c-border);
  border-radius: var(--radius-md);
  background: var(--c-bg);
  overflow: hidden;
}
.form-section__legend {
  display: block;
  width: 100%;
  padding: .6rem 1.25rem;
  background: var(--c-navy);
  color: #fff;
  font-size: .85rem;
  font-weight: 600;
  letter-spacing: .05em;
  text-transform: uppercase;
  cursor: pointer;
  user-select: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.form-section__legend::after {
  content: '▾';
  font-size: .7rem;
  transition: transform .2s;
}
.form-section.is-collapsed .form-section__legend::after { transform: rotate(-90deg); }
.form-section__body {
  padding: 1.25rem;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1rem;
}
.form-section.is-collapsed .form-section__body { display: none; }

/* Champ de formulaire individuel */
.field { display: flex; flex-direction: column; gap: .3rem; }
.field--full { grid-column: 1 / -1; }
.field label {
  font-size: .82rem;
  font-weight: 600;
  color: var(--c-navy);
}
.field label a {
  font-weight: 400;
  font-size: .78rem;
  color: var(--c-muted);
  margin-left: .3rem;
}
.field input[type="text"],
.field select {
  width: 100%;
  padding: .5rem .75rem;
  border: 1px solid var(--c-border);
  border-radius: var(--radius-sm);
  font-size: .9rem;
  font-family: inherit;
  color: var(--c-text);
  background: #fff;
  transition: border-color .15s, box-shadow .15s;
  appearance: none;
  -webkit-appearance: none;
}
.field select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%236b7280' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right .75rem center;
  padding-right: 2.25rem;
}
.field input[type="text"]:focus,
.field select:focus {
  border-color: var(--c-navy-light);
  box-shadow: 0 0 0 3px rgba(28,61,90,.15);
  outline: none;
}
.field input[type="text"]::placeholder { color: var(--c-muted); font-style: italic; }

/* Champ géographie cascadant */
.geo-cascade {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1rem;
  align-items: end;
}
.geo-cascade .field select:disabled { background-color: #f3f4f6; cursor: not-allowed; }

/* Groupe radio atelier */
.radio-group { display: flex; gap: 1.25rem; align-items: center; }
.radio-group label { display: flex; align-items: center; gap: .4rem; font-size: .9rem; }
.radio-group input[type="radio"] { accent-color: var(--c-terra); width: 1rem; height: 1rem; }

/* Aide timbre grec */
.grec-hint {
  font-size: .78rem; color: var(--c-muted);
  margin-top: .2rem;
}
.grec-hint a { font-size: .78rem; }

/* Boutons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .5rem;
  padding: .6rem 1.5rem;
  border: none; border-radius: var(--radius-md);
  font-family: inherit; font-size: 1rem; font-weight: 600;
  cursor: pointer; text-decoration: none;
  transition: background .15s, transform .1s, box-shadow .15s;
}
.btn:active { transform: translateY(1px); }
.btn--primary {
  background: var(--c-terra); color: #fff;
  box-shadow: 0 2px 6px rgba(184,92,56,.35);
}
.btn--primary:hover { background: var(--c-terra-light); color: #fff; }
.btn--secondary {
  background: var(--c-parchment); color: var(--c-navy);
  border: 1px solid var(--c-border);
}
.btn--secondary:hover { background: var(--c-border); color: var(--c-navy); }
.btn--sm { padding: .35rem .9rem; font-size: .85rem; }

.form-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 1rem;
  padding: 1rem 1.25rem;
  border-top: 1px solid var(--c-border);
  background: var(--c-parchment);
}

/* ── Page de résultats ─────────────────────────────────────────────────────── */
.results-summary {
  padding: .75rem 1.25rem;
  background: var(--c-navy);
  color: #fff;
  border-radius: var(--radius-md) var(--radius-md) 0 0;
  font-size: .95rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}
.results-summary strong { color: #fbbf24; }
.results-summary .btn--sm { flex-shrink: 0; }

.criteria-tags {
  display: flex; flex-wrap: wrap; gap: .4rem;
  padding: .75rem 1.25rem;
  background: var(--c-parchment);
  border: 1px solid var(--c-border);
  border-top: none;
}
.criteria-tag {
  display: inline-flex; align-items: center; gap: .3rem;
  padding: .2rem .6rem;
  background: var(--c-navy);
  color: rgba(255,255,255,.9);
  border-radius: 9999px;
  font-size: .78rem;
}

.results-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  border: 1px solid var(--c-border);
  border-radius: 0 0 var(--radius-lg) var(--radius-lg);
  overflow: hidden;
}

.result-item {
  display: grid;
  grid-template-columns: 140px 1fr;
  border-top: 1px solid var(--c-border);
  background: var(--c-bg);
  transition: background .1s;
}
.result-item:first-child { border-top: none; }
.result-item:hover { background: #fdfaf6; }

.result-item__thumb {
  background: var(--c-parchment);
  display: flex; align-items: center; justify-content: center;
  min-height: 120px;
  padding: .75rem;
  border-right: 1px solid var(--c-border);
}
.result-item__thumb img {
  max-width: 120px; max-height: 120px;
  border-radius: var(--radius-sm);
  object-fit: contain;
}
.result-item__thumb--none {
  flex-direction: column; gap: .4rem;
  color: var(--c-muted); font-size: .78rem; text-align: center;
}
.result-item__thumb--none svg { opacity: .35; }

.result-item__body { padding: 1rem 1.25rem; }
.result-item__content { font-size: .9rem; line-height: 1.7; }
.result-item__actions { margin-top: .75rem; display: flex; gap: .5rem; flex-wrap: wrap; }

.no-results {
  padding: 3rem 1.5rem;
  text-align: center;
  color: var(--c-muted);
  font-size: 1.05rem;
}
.no-results svg { margin: 0 auto 1rem; opacity: .4; }

/* ── Modal bibliographie ───────────────────────────────────────────────────── */
.modal-backdrop {
  display: none;
  position: fixed; inset: 0;
  background: rgba(0,0,0,.55);
  z-index: 500;
  place-items: center;
}
.modal-backdrop.is-open { display: grid; }
.modal {
  background: var(--c-bg);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  width: min(600px, 92vw);
  max-height: 80vh;
  display: flex; flex-direction: column;
  overflow: hidden;
}
.modal__header {
  padding: 1rem 1.25rem;
  background: var(--c-navy);
  color: #fff;
  display: flex; align-items: center; justify-content: space-between;
}
.modal__title { font-size: 1rem; font-weight: 600; }
.modal__close {
  background: none; border: none; color: rgba(255,255,255,.8);
  font-size: 1.4rem; cursor: pointer; line-height: 1; padding: .1rem .3rem;
  border-radius: var(--radius-sm);
}
.modal__close:hover { background: rgba(255,255,255,.15); color: #fff; }
.modal__body { padding: 1.25rem; overflow-y: auto; line-height: 1.8; }
.modal__body p { margin-bottom: .6rem; }

/* ── Page voir.php (timbres grecs) ────────────────────────────────────────── */
.grec-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.25rem;
}
.grec-card {
  border: 1px solid var(--c-border);
  border-radius: var(--radius-md);
  background: var(--c-bg);
  padding: 1rem;
  font-size: .88rem;
  line-height: 1.7;
}
.grec-card__id {
  font-weight: 700; color: var(--c-navy);
  margin-bottom: .4rem;
  font-size: .95rem;
}

.typo-panel {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  align-items: start;
}
@media (max-width: 600px) { .typo-panel { grid-template-columns: 1fr; } }

/* ── Spinner de chargement ─────────────────────────────────────────────────── */
.spinner {
  display: inline-block;
  width: 1.25rem; height: 1.25rem;
  border: 2px solid var(--c-border);
  border-top-color: var(--c-navy);
  border-radius: 50%;
  animation: spin .7s linear infinite;
  vertical-align: middle;
}
@keyframes spin { to { transform: rotate(360deg); } }

.loading-placeholder {
  display: flex; align-items: center; gap: .5rem;
  color: var(--c-muted); font-size: .85rem; padding: .5rem 0;
}

/* ── Messages ─────────────────────────────────────────────────────────────── */
.alert {
  padding: .75rem 1rem;
  border-radius: var(--radius-md);
  font-size: .9rem;
  border-left: 4px solid;
  margin-bottom: 1rem;
}
.alert--info    { background: #eff6ff; border-color: #3b82f6; color: #1e40af; }
.alert--warning { background: #fffbeb; border-color: #f59e0b; color: #92400e; }
.alert--error   { background: #fef2f2; border-color: var(--c-error); color: #991b1b; }

/* ── Footer ────────────────────────────────────────────────────────────────── */
.site-footer {
  background: var(--c-navy-dark);
  color: rgba(255,255,255,.7);
  margin-top: auto;
  font-size: .82rem;
}
.site-footer__inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 1.5rem 1.25rem;
  display: flex;
  align-items: center;
  gap: 2rem;
  flex-wrap: wrap;
}
.site-footer__logos { display: flex; align-items: center; gap: 1.25rem; }
.site-footer__logos img { filter: brightness(0) invert(1) opacity(.7); }
.site-footer__logos a:hover img { opacity: 1; filter: brightness(0) invert(1); }
.site-footer__contact a { color: rgba(255,255,255,.8); }
.site-footer__copy { margin-left: auto; }

/* ── Responsive ────────────────────────────────────────────────────────────── */
@media (max-width: 768px) {
  :root { --header-h: 56px; }

  .site-header__subtitle { display: none; }
  .site-nav__link { padding: .35rem .5rem; font-size: .82rem; }

  .result-item { grid-template-columns: 1fr; }
  .result-item__thumb { border-right: none; border-bottom: 1px solid var(--c-border); min-height: 80px; }

  .site-footer__inner { flex-direction: column; align-items: flex-start; gap: 1rem; }
  .site-footer__copy { margin-left: 0; }
}

@media (max-width: 480px) {
  .page { padding: 1.25rem .75rem; }
  .form-section__body { grid-template-columns: 1fr; }
  .geo-cascade { grid-template-columns: 1fr; }
  .page-title { font-size: 1.3rem; }
}

/* ── Utilitaires ───────────────────────────────────────────────────────────── */
.sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}
.text-muted { color: var(--c-muted); }
.text-terra { color: var(--c-terra); }
.mt-1 { margin-top: .5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }

/* ── Bouton infobulle (?) ───────────────────────────────────────────────── */
.infobulle-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.15rem; height: 1.15rem;
  padding: 0;
  margin-left: .3rem;
  background: var(--c-navy);
  color: #fff;
  border: none;
  border-radius: 50%;
  font-size: .65rem;
  font-weight: 700;
  font-family: var(--font-sans);
  cursor: pointer;
  vertical-align: middle;
  line-height: 1;
  transition: background .15s, transform .1s;
  flex-shrink: 0;
}
.infobulle-btn:hover  { background: var(--c-terra); }
.infobulle-btn:active { transform: scale(.9); }
.infobulle-btn:focus-visible {
  outline: 2px solid var(--c-focus);
  outline-offset: 2px;
}