:root {
  --color-primary: #1864af;
  --color-primary-dark: #124a82;
  --color-primary-darker: #0e3863;
  --color-primary-hover: #2d92cb;
  --color-accent: #f4a300;
  --color-accent-dark: #c97f00;
  --color-success: #2e9e5b;
  --color-danger: #d63b3b;
  --color-bg: #f5f8fc;
  --color-card: #ffffff;
  --color-text: #2d2d2d;
  --color-muted: #6b7280;
  --radius: 16px;
  --shadow: 0 4px 14px rgba(24, 100, 175, 0.12);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: 'Segoe UI', Roboto, sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.5;
}

/* ===== Top bar ===== */
.topbar {
  background: linear-gradient(120deg, var(--color-primary), var(--color-primary-darker));
  color: #fff;
  min-height: 112px;
  padding: 12px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  box-shadow: var(--shadow);
}

.topbar .brand {
  display: flex;
  align-items: center;
  gap: 16px;
  font-weight: 700;
  font-size: 1.3rem;
}

.brand .logo {
  width: 236px;
  height: 79px;
  object-fit: contain;
  background: #fff;
  border-radius: 6px;
  padding: 4px;
  flex-shrink: 0;
}

main {
  max-width: 1100px;
  margin: 0 auto;
  padding: 28px 18px 60px;
}

/* ===== Hero ===== */
.page-hero {
  text-align: center;
  padding: 30px 20px 18px;
}

.page-hero .emoji {
  font-size: 3rem;
}

.page-hero h1 {
  font-size: 2rem;
  color: var(--color-primary-darker);
  margin: 8px 0 4px;
}

.page-hero p {
  color: var(--color-muted);
  max-width: 700px;
  margin: 0 auto;
}

/* ===== Fil d'Ariane / navigation ===== */
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 20px;
  font-size: 0.9rem;
  color: var(--color-muted);
}

.breadcrumb .sep {
  opacity: 0.6;
}

.breadcrumb .current {
  color: var(--color-primary-darker);
  font-weight: 700;
}

.btn-back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: #fff;
  border: 1px solid #dbe4f0;
  color: var(--color-primary-darker);
  font-weight: 600;
  font-size: 0.88rem;
  padding: 9px 16px;
  border-radius: 20px;
  cursor: pointer;
  text-decoration: none;
  transition: 0.2s;
  box-shadow: 0 1px 3px rgba(0,0,0,0.06);
}

.btn-back:hover {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}

.nav-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 22px;
}

/* ===== Groupes de disciplines (accueil) ===== */
.group-section {
  margin-bottom: 34px;
}

.group-title {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--color-primary-darker);
  font-size: 1.35rem;
  margin: 0 0 14px;
}

.group-title .icon {
  font-size: 1.6rem;
}

.level-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}

.level-card {
  background: var(--color-card);
  border-radius: var(--radius);
  border: 1px solid #e2e9f3;
  border-left: 6px solid var(--color-primary);
  padding: 20px 22px;
  cursor: pointer;
  transition: 0.2s;
  text-align: left;
  font: inherit;
  color: inherit;
  display: block;
  width: 100%;
}

.level-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow);
  border-left-color: var(--color-accent);
}

.level-card h3 {
  margin: 0 0 6px;
  font-size: 1.05rem;
  color: var(--color-primary-darker);
}

.level-card p {
  margin: 0;
  font-size: 0.85rem;
  color: var(--color-muted);
}

.level-card .count {
  display: inline-block;
  margin-top: 10px;
  font-size: 0.78rem;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 20px;
  background: #eaf3fc;
  color: var(--color-primary-darker);
}

/* ===== Liste des documents ===== */
.doc-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.doc-item {
  display: flex;
  align-items: center;
  gap: 14px;
  background: var(--color-card);
  border: 1px solid #e2e9f3;
  border-radius: 12px;
  padding: 14px 18px;
  cursor: pointer;
  transition: 0.2s;
  text-align: left;
  text-decoration: none;
  font: inherit;
  color: inherit;
  width: 100%;
}

.doc-item:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow);
  background: #f9fbff;
}

.doc-item .doc-icon {
  font-size: 1.6rem;
  flex-shrink: 0;
}

.doc-item .doc-info {
  flex: 1;
  min-width: 0;
}

.doc-item .doc-title {
  font-weight: 700;
  color: var(--color-primary-darker);
  margin: 0 0 2px;
}

.doc-item .doc-date {
  font-size: 0.8rem;
  color: var(--color-muted);
}

.doc-item .doc-open {
  flex-shrink: 0;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--color-primary);
}

/* ===== État vide ===== */
.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--color-muted);
}

.empty-state .emoji {
  font-size: 3rem;
  display: block;
  margin-bottom: 10px;
}

/* ===== Visionneuse PDF plein écran ===== */
.pdf-overlay {
  position: fixed;
  inset: 0;
  background: #1a1a1a;
  z-index: 1000;
  display: flex;
  flex-direction: column;
}

.pdf-overlay-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  background: var(--color-primary-darker);
  color: #fff;
  padding: 12px 18px;
  flex-wrap: wrap;
}

.pdf-overlay-header .pdf-title {
  font-weight: 700;
  font-size: 1rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.pdf-overlay-actions {
  display: flex;
  gap: 8px;
  flex-shrink: 0;
}

.btn-close {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255,255,255,0.12);
  border: 1px solid rgba(255,255,255,0.3);
  color: #fff;
  font-weight: 700;
  font-size: 0.88rem;
  padding: 9px 16px;
  border-radius: 20px;
  cursor: pointer;
  transition: 0.2s;
}

.btn-close:hover {
  background: var(--color-danger);
  border-color: var(--color-danger);
}

.pdf-overlay iframe {
  flex: 1;
  width: 100%;
  border: none;
  background: #525659;
}

footer {
  text-align: center;
  padding: 20px;
  color: var(--color-muted);
  font-size: 0.8rem;
}

@media (max-width: 700px) {
  .topbar { flex-direction: column; align-items: flex-start; }
}