/* Lock the whole app to the viewport so deep children that overflow
   (long tables, big modals) scroll within their container, not the
   page. Without this, a wide table can push the body past 100vw and
   create the mobile horizontal-scroll bug. */
html, body {
  overflow-x: hidden;
  max-width: 100vw;
}

.app-container {
  display: flex;
  min-height: 100vh;
  overflow-x: hidden;
  max-width: 100vw;
}

/* ── Sidebar ────────────────────────────────────── */
.sidebar {
  position: fixed;
  top: 0;
  right: 0;
  width: var(--sidebar-width);
  height: 100vh;
  background: var(--bg-sidebar);
  border-left: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  z-index: 100;
  transition: width var(--transition), transform var(--transition);
  overflow-x: hidden;
}

.sidebar.collapsed {
  width: var(--sidebar-collapsed);
}

.sidebar-header {
  padding: 20px;
  display: flex;
  align-items: center;
  gap: 12px;
  border-bottom: 1px solid var(--border);
  min-height: 80px;
}

.sidebar-header .logo {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--primary-dark);
  flex-shrink: 0;
}

.sidebar-header .school-name {
  font-family: 'Tajawal', sans-serif;
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-main);
  white-space: nowrap;
  overflow: hidden;
}

.sidebar.collapsed .school-name {
  display: none;
}

.sidebar-nav {
  flex: 1;
  padding: 12px 8px;
  overflow-y: auto;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  cursor: pointer;
  transition: all var(--transition);
  margin-bottom: 4px;
  white-space: nowrap;
}

.nav-item:hover {
  background: var(--bg-card);
  color: var(--text-main);
}

.nav-item.active {
  background: linear-gradient(135deg, #f5d77f 0%, #d4af37 50%, #aa7c11 100%);
  color: #08090c;
  font-weight: 700;
  box-shadow: 0 4px 15px rgba(212, 175, 55, 0.3);
}

.nav-item .icon {
  width: 20px;
  text-align: center;
  flex-shrink: 0;
  font-size: 1.1rem;
}

.nav-item .label {
  font-size: 0.9rem;
}

.sidebar.collapsed .nav-item .label {
  display: none;
}

.nav-separator {
  font-size: 0.68rem;
  font-weight: 700;
  color: var(--text-muted);
  opacity: 0.5;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 12px 16px 4px;
  white-space: nowrap;
  overflow: hidden;
}

.sidebar.collapsed .nav-separator {
  display: none;
}

.sidebar-footer {
  padding: 16px;
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 12px;
}

.sidebar-footer .user-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: linear-gradient(135deg, #f5d77f 0%, #d4af37 100%);
  color: #08090c;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 0.85rem;
  flex-shrink: 0;
}

.sidebar-footer .user-info {
  overflow: hidden;
}

.sidebar-footer .user-name {
  font-size: 0.85rem;
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.sidebar-footer .user-role {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.sidebar.collapsed .user-info {
  display: none;
}

.sidebar-footer .logout-btn {
  margin-right: auto;
  background: none;
  border: none;
  color: var(--danger);
  cursor: pointer;
  font-size: 1.1rem;
  padding: 8px;
  border-radius: var(--radius-sm);
  transition: background var(--transition);
}

.sidebar-footer .logout-btn:hover {
  background: rgba(231, 76, 60, 0.15);
}

/* ── Skoly Credit Footer ────────────────────────── */
.sidebar-credit {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 8px 16px;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  flex-shrink: 0;
}

.sidebar-credit-link {
  display: flex;
  align-items: center;
  color: var(--text-muted);
  opacity: 0.55;
  transition: opacity 0.2s ease;
  text-decoration: none;
}

.sidebar-credit-link:hover {
  opacity: 0.9;
}

.sidebar-credit-text {
  font-size: 0.7rem;
  color: var(--text-muted);
  opacity: 0.55;
  text-decoration: none;
  letter-spacing: 0.04em;
  transition: opacity 0.2s ease;
}

.sidebar-credit-text:hover {
  opacity: 0.9;
}

.sidebar.collapsed .sidebar-credit-text {
  display: none;
}

.sidebar.collapsed .sidebar-credit {
  justify-content: center;
  gap: 8px;
}

/* ── Main Content ───────────────────────────────── */
.main-content {
  flex: 1;
  /* min-width: 0 is the canonical fix for a flex child whose intrinsic
     content (long tables, no-wrap rows) was pushing the flex container
     past the viewport on mobile. */
  min-width: 0;
  max-width: 100%;
  overflow-x: hidden;
  margin-right: var(--sidebar-width);
  transition: margin-right var(--transition);
}

.sidebar.collapsed ~ .main-content {
  margin-right: var(--sidebar-collapsed);
}

/* ── Topbar ─────────────────────────────────────── */
.topbar {
  position: sticky;
  top: 0;
  height: var(--topbar-height);
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  padding: 0 24px;
  gap: 16px;
  z-index: 50;
}

.topbar .toggle-sidebar {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 1.2rem;
  padding: 8px;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
}

.topbar .toggle-sidebar:hover {
  background: var(--bg-input);
  color: var(--text-main);
}

.topbar .page-title {
  font-size: 1.1rem;
  font-weight: 600;
  flex: 1;
  /* Allow truncation of long Arabic page titles in the topbar */
  min-width: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.topbar .notifications-btn {
  position: relative;
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 1.2rem;
  padding: 8px;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
}

.topbar .notifications-btn:hover {
  background: var(--bg-input);
  color: var(--text-main);
}

.topbar .notifications-btn .badge {
  position: absolute;
  top: 2px;
  left: 2px;
  background: var(--danger);
  color: #fff;
  font-size: 0.65rem;
  font-weight: 700;
  min-width: 16px;
  height: 16px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 4px;
}

.topbar .impersonation-bar {
  background: var(--warning);
  color: var(--primary-dark);
  padding: 4px 16px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 8px;
}

.topbar .impersonation-bar button {
  background: var(--primary-dark);
  color: #fff;
  border: none;
  padding: 4px 12px;
  border-radius: 4px;
  font-size: 0.8rem;
  cursor: pointer;
}

/* ── Page Content ───────────────────────────────── */
.page-content {
  padding: 24px;
  max-width: 1400px;
  /* Keep page content within parent so descendants with no-wrap
     content scroll *inside* their own container instead of pushing
     the page sideways. */
  width: 100%;
  box-sizing: border-box;
  min-width: 0;
  overflow-x: hidden;
}

/* ── Responsive ─────────────────────────────────── */
.sidebar-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  z-index: 99;
}

@media (max-width: 768px) {
  .sidebar {
    transform: translateX(100%);
    width: var(--sidebar-width);
  }

  .sidebar.open {
    transform: translateX(0);
  }

  .sidebar.open ~ .sidebar-overlay {
    display: block;
  }

  .main-content {
    margin-right: 0;
  }

  .page-content {
    padding: 16px;
  }
}

/* ── Grid System ────────────────────────────────── */
.grid {
  display: grid;
  gap: 20px;
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-6 { grid-template-columns: repeat(6, 1fr); }

@media (max-width: 1200px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-6 { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 768px) {
  .grid-2, .grid-3, .grid-4, .grid-6 {
    grid-template-columns: 1fr;
  }
}

.flex { display: flex; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-8 { gap: 8px; }
.gap-12 { gap: 12px; }
.gap-16 { gap: 16px; }
.gap-20 { gap: 20px; }
.mt-12 { margin-top: 12px; }
.mt-20 { margin-top: 20px; }
.mt-24 { margin-top: 24px; }
.mb-16 { margin-bottom: 16px; }
.mb-20 { margin-bottom: 20px; }
.mb-24 { margin-bottom: 24px; }
.text-center { text-align: center; }
.text-left { text-align: left; }