/* ============================================================
   ABUGIDA LAYOUT
   Header, Sidebar, Page Structure
   ============================================================ */

/* ============================================================
   1. HEADER / NAVIGATION
   ============================================================ */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: rgba(255,255,255,0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  z-index: var(--z-sticky);
  transition: background var(--duration-normal) ease, border-color var(--duration-normal) ease;
}
[data-theme="dark"] .site-header {
  background: rgba(11,15,26,0.85);
}

.header-inner {
  max-width: var(--max-content-width);
  margin: 0 auto;
  padding: 0 var(--space-6);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-8);
}

/* Brand */
.brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  flex-shrink: 0;
}
.brand-logo {
  width: 32px;
  height: 32px;
  background: var(--color-primary);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 700;
  font-size: var(--text-base);
}
.brand-name {
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-text-primary);
  letter-spacing: -0.01em;
}

/* Nav Links */
.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}
.nav-link {
  padding: 0.5rem 0.875rem;
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-secondary);
  border-radius: var(--radius-md);
  transition: all var(--duration-fast) ease;
  text-decoration: none;
}
.nav-link:hover { color: var(--color-text-primary); background: var(--color-surface-secondary); }
.nav-link.active { color: var(--color-primary); background: var(--color-primary-light); }

/* Nav Actions */
.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}
.nav-auth-group {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}
.nav-auth-group.hidden { display: none; }

/* Mobile Menu Toggle */
.menu-toggle {
  display: none;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  color: var(--color-text-secondary);
  transition: all var(--duration-fast) ease;
}
.menu-toggle:hover { background: var(--color-surface-secondary); }
.menu-toggle svg { width: 20px; height: 20px; }

/* Theme & Language Toggle Icons */
.btn-icon {
  color: var(--color-text-secondary);
}
.btn-icon:hover {
  color: var(--color-text-primary);
  background: var(--color-surface-secondary);
}
[data-theme="dark"] .btn-icon {
  color: var(--color-text-secondary);
}
[data-theme="dark"] .btn-icon:hover {
  color: var(--color-text-primary);
}
[data-theme="dark"] .btn-icon svg {
  stroke: var(--color-text-secondary);
}
[data-theme="dark"] .btn-icon:hover svg {
  stroke: var(--color-text-primary);
}

/* Mobile Nav Overlay */
.mobile-nav-overlay {
  display: none;
  position: fixed;
  inset: 0;
  top: var(--header-height);
  background: var(--color-surface);
  z-index: var(--z-overlay);
  padding: var(--space-4) var(--space-6);
  animation: fadeIn var(--duration-normal) ease;
}
.mobile-nav-overlay.active { display: block; }
.mobile-nav-overlay .nav-link {
  display: block;
  padding: 0.875rem var(--space-4);
  font-size: var(--text-base);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-1);
}
.mobile-nav-actions {
  margin-top: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

/* ============================================================
   2. SIDEBAR (Dashboard)
   ============================================================ */
.sidebar {
  position: fixed;
  top: var(--header-height);
  left: 0;
  bottom: 0;
  width: var(--sidebar-width);
  background: var(--color-surface);
  border-right: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  z-index: var(--z-sticky);
  transition: transform var(--duration-slow) var(--ease-out);
}

.sidebar-header {
  padding: var(--space-5) var(--space-5);
  border-bottom: 1px solid var(--color-border);
}
.sidebar-brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
}
.sidebar-brand-logo {
  width: 28px;
  height: 28px;
  background: var(--color-primary);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 700;
  font-size: var(--text-xs);
  flex-shrink: 0;
}
.sidebar-brand-name {
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-text-primary);
}

/* Sidebar Navigation */
.sidebar-nav {
  flex: 1;
  padding: var(--space-3);
  overflow-y: auto;
}
.sidebar-section-label {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-tertiary);
  padding: var(--space-4) var(--space-3) var(--space-2);
}
.sidebar-link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: 0.5625rem var(--space-3);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-secondary);
  border-radius: var(--radius-md);
  text-decoration: none;
  transition: all var(--duration-fast) ease;
  margin-bottom: 2px;
}
.sidebar-link:hover {
  color: var(--color-text-primary);
  background: var(--color-surface-secondary);
}
.sidebar-link.active {
  color: var(--color-primary);
  background: var(--color-primary-light);
  font-weight: 600;
}
.sidebar-link svg { width: 18px; height: 18px; flex-shrink: 0; opacity: 0.7; }
.sidebar-link.active svg { opacity: 1; }

/* Sidebar Footer */
.sidebar-footer {
  padding: var(--space-3);
  border-top: 1px solid var(--color-border);
}
.sidebar-user {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background var(--duration-fast) ease;
}
.sidebar-user:hover { background: var(--color-surface-secondary); }
.sidebar-user-info { flex: 1; min-width: 0; }
.sidebar-user-name {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.sidebar-user-email {
  font-size: 11px;
  color: var(--color-text-tertiary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Sidebar Overlay (mobile) */
.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.3);
  z-index: calc(var(--z-sticky) - 1);
  backdrop-filter: blur(2px);
}
.sidebar-overlay.active { display: block; }

/* ============================================================
   3. DASHBOARD LAYOUT
   ============================================================ */
.dashboard-layout {
  display: flex;
  min-height: 100vh;
  padding-top: var(--header-height);
}
.dashboard-main {
  flex: 1;
  margin-left: var(--sidebar-width);
  min-height: calc(100vh - var(--header-height));
}
.dashboard-content {
  max-width: 1100px;
  margin: 0 auto;
  padding: var(--space-8);
}

/* Dashboard Header */
.dashboard-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-8);
}
.dashboard-header-left { display: flex; flex-direction: column; gap: var(--space-1); }
.dashboard-title {
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--color-text-primary);
  letter-spacing: var(--tracking-tight);
}
.dashboard-subtitle {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}
.dashboard-header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

/* Dashboard Page Sections */
.dashboard-page { display: none; }
.dashboard-page.active { display: block; animation: fadeIn var(--duration-normal) ease; }

/* Children Section Header */
.children-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-6);
  gap: var(--space-3);
}
.children-header h2 { margin: 0; }

/* Stats Grid */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-4);
  margin-bottom: var(--space-8);
}

/* Children Grid */
.children-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--space-4);
}

/* ============================================================
   4. CHILD CARD
   ============================================================ */
.child-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  transition: all var(--duration-normal) var(--ease-out);
  position: relative;
}
.child-card:hover {
  border-color: var(--color-primary-subtle);
  box-shadow: var(--shadow-sm);
}
.child-card-header {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}
.child-card-info { flex: 1; min-width: 0; }
.child-card-name {
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: 2px;
}
.child-card-grade {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}
.child-card-details {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.child-card-detail {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}
.child-card-detail svg { width: 14px; height: 14px; flex-shrink: 0; color: var(--color-text-tertiary); }
.child-card-actions {
  display: flex;
  gap: var(--space-2);
  margin-top: var(--space-4);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border-light);
}

/* ============================================================
   5. WELCOME CARD
   ============================================================ */
.welcome-card {
  background: linear-gradient(135deg, var(--color-primary) 0%, #7C3AED 100%);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  color: white;
  margin-bottom: var(--space-8);
  position: relative;
  overflow: hidden;
}
.welcome-card::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 300px;
  height: 300px;
  background: rgba(255,255,255,0.08);
  border-radius: 50%;
}
.welcome-card::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: 10%;
  width: 200px;
  height: 200px;
  background: rgba(255,255,255,0.05);
  border-radius: 50%;
}
.welcome-card h2 {
  font-size: var(--text-2xl);
  font-weight: 700;
  margin-bottom: var(--space-2);
  position: relative;
  z-index: 1;
}
.welcome-card p {
  font-size: var(--text-base);
  opacity: 0.9;
  position: relative;
  z-index: 1;
}

/* ============================================================
   6. SETTINGS FORM
   ============================================================ */
.settings-section {
  max-width: 560px;
}
.settings-section .card {
  padding: var(--space-8);
}

/* ============================================================
   7. RESPONSIVE
   ============================================================ */
@media (max-width: 1024px) {
  .sidebar { transform: translateX(-100%); }
  .sidebar.active { transform: translateX(0); box-shadow: var(--shadow-2xl); }
  .dashboard-main { margin-left: 0; }
  .dashboard-content { padding: var(--space-6); }
}

@media (max-width: 768px) {
  .nav-links { display: none; }
  .menu-toggle { display: flex; }
  .nav-auth-group { display: none; }
  .header-inner { padding: 0 var(--space-4); }

  .dashboard-content { padding: var(--space-4); }
  .dashboard-header { flex-direction: column; align-items: flex-start; gap: var(--space-3); }
  .dashboard-title { font-size: var(--text-xl); }
  .stats-grid { grid-template-columns: 1fr; }
  .children-grid { grid-template-columns: 1fr; }
  .children-header { flex-direction: column; align-items: flex-start; }
  .children-header .btn { width: 100%; }
  .welcome-card { padding: var(--space-6); }
  .welcome-card h2 { font-size: var(--text-xl); }
}

@media (max-width: 480px) {
  .dashboard-content { padding: var(--space-4) var(--space-3); }
  .welcome-card { padding: var(--space-5); }
}