/* ================================================================
   LAYOUTS — Système de Design · Marque État Congolais
   ================================================================ */

/* ── Conteneur principal ── */
.container-rdc {
  width: 100%;
  max-width: var(--header-w);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

@media (min-width: 768px)  { .container-rdc { padding: 0 var(--space-8); } }
@media (min-width: 1280px) { .container-rdc { padding: 0 var(--space-12); } }

/* ── Grilles responsive ── */
.grid { display: grid; gap: var(--space-6); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 1279px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 767px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}

/* ── Flexbox utilitaires ── */
.flex-center   { display: flex; align-items: center; justify-content: center; }
.flex-between  { display: flex; align-items: center; justify-content: space-between; }
.flex-stack    { display: flex; flex-direction: column; }
.flex-wrap     { flex-wrap: wrap; }

/* ── Section spacing ── */
.section {
  padding: var(--space-16) 0;
}
.section + .section {
  border-top: 1px solid var(--border-soft);
}

/* ── Sidebar layout ── */
.layout-sidebar {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  width: var(--sidebar-width);
  background: linear-gradient(180deg, #ffffff 0%, #f9fafb 100%);
  border-right: 1px solid var(--border-soft);
  box-shadow: 2px 0 10px rgba(0,0,0,0.04);
  position: fixed;
  top: 0; left: 0; bottom: 0;
  overflow-y: auto;
  z-index: var(--z-sticky);
  transition: width var(--transition-slow);
}
.sidebar.collapsed {
  width: var(--sidebar-collapsed);
}

.sidebar-header {
  padding: var(--space-5) var(--space-5);
  border-bottom: 1px solid var(--border-soft);
}

.sidebar-section {
  padding: var(--space-4) var(--space-3);
}
.sidebar-section-title {
  font-family: var(--font-principale);
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  padding: 0 var(--space-3) var(--space-2);
}

.sidebar-link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  font-family: var(--font-principale);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text-secondary);
  text-decoration: none;
  transition: all var(--transition-normal);
  border-left: 3px solid transparent;
}
.sidebar-link:hover {
  background: var(--primary-light);
  color: var(--primary);
}
.sidebar-link.active {
  background: var(--primary-light);
  color: var(--primary);
  font-weight: 600;
  border-left-color: var(--primary);
}

.main-content {
  margin-left: var(--sidebar-width);
  min-height: 100vh;
  padding: var(--space-8);
  flex: 1;
  transition: margin-left var(--transition-slow);
}

/* ── Content zone (438px charter spec) ── */
.content-zone {
  max-width: var(--content-zone);
}

/* ── Page hero ── */
.page-hero {
  padding: var(--space-10) 0 var(--space-8);
  border-bottom: 1px solid var(--border-soft);
  margin-bottom: var(--space-8);
}
.page-title {
  font-family: var(--font-principale);
  font-size: var(--text-3xl);
  font-weight: 700;
  color: var(--text-primary);
  line-height: var(--leading-tight);
}
.page-subtitle {
  font-family: var(--font-complement);
  font-size: var(--text-base);
  color: var(--text-secondary);
  margin-top: var(--space-2);
}

/* ── Responsive sidebar ── */
@media (max-width: 1023px) {
  .sidebar {
    transform: translateX(-100%);
    transition: transform var(--transition-slow);
  }
  .sidebar.open {
    transform: translateX(0);
  }
  .main-content {
    margin-left: 0;
  }
}

/* ── Visually hidden (accessibilité) ── */
.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;
}