/* =====================================================
   School Manager — Premium SaaS Theme
   Dark Blue / Dark Red / White
   ===================================================== */

:root {
  --sm-navy-900: #061226;
  --sm-navy-800: #0b2447;
  --sm-navy-700: #145374;
  --sm-navy-600: #19638a;
  --sm-red-700: #6e1423;
  --sm-red-600: #8b0000;
  --sm-red-500: #b3251f;
  --sm-red-100: #fbe7e7;
  --sm-white: #ffffff;
  --sm-bg: #f3f5f9;
  --sm-card-bg: #ffffff;
  --sm-text: #1c2433;
  --sm-text-muted: #66748f;
  --sm-border: #e6e9f1;
  --sm-sidebar-w: 268px;
  --sm-sidebar-w-collapsed: 84px;
  --sm-topbar-h: 70px;
  --sm-radius: 14px;
  --sm-radius-sm: 9px;
  --sm-shadow: 0 4px 24px rgba(11, 36, 71, 0.06);
  --sm-shadow-lg: 0 12px 40px rgba(11, 36, 71, 0.12);
  --sm-transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-bs-theme="dark"] {
  --sm-bg: #0c1322;
  --sm-card-bg: #131c30;
  --sm-text: #e8ecf5;
  --sm-text-muted: #93a0bd;
  --sm-border: #232d44;
  --sm-shadow: 0 4px 24px rgba(0, 0, 0, 0.35);
  --sm-shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.5);
}

* { box-sizing: border-box; }

html, body {
  height: 100%;
}

body {
  background: var(--sm-bg);
  color: var(--sm-text);
  font-family: 'Inter', 'Segoe UI', -apple-system, BlinkMacSystemFont, sans-serif;
  font-size: 0.925rem;
  transition: background 0.25s ease, color 0.25s ease;
}

a { text-decoration: none; }

::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--sm-border); border-radius: 10px; }
::-webkit-scrollbar-thumb:hover { background: var(--sm-navy-700); }

/* ---------- App Shell ---------- */
.sm-app {
  display: flex;
  min-height: 100vh;
}

/* ---------- Sidebar ---------- */
.sm-sidebar {
  width: var(--sm-sidebar-w);
  flex-shrink: 0;
  background: linear-gradient(180deg, var(--sm-navy-900) 0%, var(--sm-navy-800) 100%);
  color: #cfd9ec;
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 1040;
  display: flex;
  flex-direction: column;
  transition: var(--sm-transition), transform 0.25s ease;
  box-shadow: var(--sm-shadow-lg);
}

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

.sm-sidebar-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1.35rem 1.4rem;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  white-space: nowrap;
  overflow: hidden;
}

.sm-sidebar-brand img, .sm-sidebar-brand .sm-logo-fallback {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  object-fit: cover;
  background: var(--sm-red-600);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: #fff;
  flex-shrink: 0;
}

.sm-sidebar-brand .sm-brand-name {
  font-weight: 700;
  font-size: 1.02rem;
  color: #fff;
  line-height: 1.15;
}

.sm-sidebar-brand .sm-brand-sub {
  font-size: 0.7rem;
  color: #93a0bd;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.sm-sidebar.collapsed .sm-brand-name,
.sm-sidebar.collapsed .sm-brand-sub,
.sm-sidebar.collapsed .sm-nav-section-title,
.sm-sidebar.collapsed .sm-nav-text,
.sm-sidebar.collapsed .sm-nav-badge,
.sm-sidebar.collapsed .sm-nav-arrow {
  display: none !important;
}

.sm-sidebar-nav {
  flex: 1;
  overflow-y: auto;
  padding: 1rem 0.8rem;
}

.sm-nav-section-title {
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #5e6c8a;
  font-weight: 700;
  padding: 1.1rem 0.7rem 0.4rem;
}

.sm-nav-link {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding: 0.62rem 0.8rem;
  border-radius: var(--sm-radius-sm);
  color: #c4cee3;
  font-weight: 500;
  font-size: 0.875rem;
  margin-bottom: 0.18rem;
  transition: var(--sm-transition);
  position: relative;
}

.sm-nav-link i.sm-nav-icon {
  width: 19px;
  text-align: center;
  font-size: 1rem;
  flex-shrink: 0;
}

.sm-nav-link:hover {
  background: rgba(255,255,255,0.07);
  color: #fff;
}

.sm-nav-link.active {
  background: linear-gradient(90deg, var(--sm-red-600), var(--sm-red-500));
  color: #fff;
  box-shadow: 0 4px 14px rgba(139,0,0,0.35);
}

.sm-nav-badge {
  margin-left: auto;
  font-size: 0.65rem;
  font-weight: 700;
  background: var(--sm-red-600);
  color: #fff;
  border-radius: 20px;
  padding: 0.1rem 0.5rem;
}

.sm-nav-text { flex: 1; }

.sm-sidebar-footer {
  padding: 0.9rem 1.2rem;
  border-top: 1px solid rgba(255,255,255,0.08);
  font-size: 0.72rem;
  color: #5e6c8a;
  white-space: nowrap;
  overflow: hidden;
}

/* ---------- Main / Topbar ---------- */
.sm-main {
  margin-left: var(--sm-sidebar-w);
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  transition: margin-left 0.25s ease;
}

.sm-main.collapsed { margin-left: var(--sm-sidebar-w-collapsed); }

.sm-topbar {
  height: var(--sm-topbar-h);
  background: var(--sm-card-bg);
  border-bottom: 1px solid var(--sm-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1.5rem;
  position: sticky;
  top: 0;
  z-index: 1020;
  gap: 1rem;
}

.sm-topbar-toggle, .sm-icon-btn {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  border: 1px solid var(--sm-border);
  background: var(--sm-bg);
  color: var(--sm-text);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: var(--sm-transition);
}

.sm-icon-btn:hover, .sm-topbar-toggle:hover {
  background: var(--sm-navy-800);
  color: #fff;
  border-color: var(--sm-navy-800);
}

.sm-search {
  position: relative;
  flex: 1;
  max-width: 420px;
}

.sm-search input {
  width: 100%;
  border-radius: 999px;
  border: 1px solid var(--sm-border);
  background: var(--sm-bg);
  padding: 0.55rem 1rem 0.55rem 2.4rem;
  font-size: 0.85rem;
  color: var(--sm-text);
}

.sm-search input:focus { outline: none; border-color: var(--sm-navy-700); }

.sm-search i {
  position: absolute;
  left: 0.95rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--sm-text-muted);
}

.sm-topbar-right { display: flex; align-items: center; gap: 0.6rem; }

.sm-user-chip {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.3rem 0.6rem 0.3rem 0.3rem;
  border-radius: 999px;
  border: 1px solid var(--sm-border);
  cursor: pointer;
}

.sm-user-chip img {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  object-fit: cover;
}

.sm-user-chip .sm-user-name {
  font-size: 0.82rem;
  font-weight: 600;
  line-height: 1.1;
}

.sm-user-chip .sm-user-role {
  font-size: 0.68rem;
  color: var(--sm-text-muted);
}

.sm-badge-dot {
  position: absolute;
  top: 6px;
  right: 6px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--sm-red-600);
  border: 2px solid var(--sm-card-bg);
}

.sm-content {
  padding: 1.6rem;
  flex: 1;
}

/* ---------- Page Header ---------- */
.sm-page-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.sm-page-title {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--sm-text);
  margin: 0;
}

.sm-breadcrumb-trail {
  font-size: 0.8rem;
  color: var(--sm-text-muted);
}

.sm-breadcrumb-trail a { color: var(--sm-text-muted); }
.sm-breadcrumb-trail a:hover { color: var(--sm-navy-700); }

/* ---------- Cards ---------- */
.sm-card {
  background: var(--sm-card-bg);
  border: 1px solid var(--sm-border);
  border-radius: var(--sm-radius);
  box-shadow: var(--sm-shadow);
  transition: var(--sm-transition);
}

.sm-card-body { padding: 1.4rem; }

.sm-card.sm-hover:hover {
  transform: translateY(-3px);
  box-shadow: var(--sm-shadow-lg);
}

.sm-stat-card {
  border-radius: var(--sm-radius);
  padding: 1.4rem;
  position: relative;
  overflow: hidden;
  color: #fff;
  box-shadow: var(--sm-shadow);
}

.sm-stat-card.navy { background: linear-gradient(135deg, var(--sm-navy-800), var(--sm-navy-700)); }
.sm-stat-card.red { background: linear-gradient(135deg, var(--sm-red-700), var(--sm-red-600)); }
.sm-stat-card.light {
  background: var(--sm-card-bg);
  color: var(--sm-text);
  border: 1px solid var(--sm-border);
}
.sm-stat-card.teal { background: linear-gradient(135deg, #0f5959, #14807f); }
.sm-stat-card.amber { background: linear-gradient(135deg, #8a5a08, #c2870b); }

.sm-stat-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: rgba(255,255,255,0.18);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  margin-bottom: 0.9rem;
}

.sm-stat-card.light .sm-stat-icon { background: var(--sm-bg); color: var(--sm-navy-800); }

.sm-stat-value { font-size: 1.7rem; font-weight: 800; margin: 0; line-height: 1.2; }
.sm-stat-label { font-size: 0.78rem; opacity: 0.85; font-weight: 500; }

.sm-stat-trend {
  position: absolute;
  top: 1.4rem;
  right: 1.4rem;
  font-size: 0.72rem;
  font-weight: 700;
  background: rgba(255,255,255,0.18);
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
}

/* ---------- Tables ---------- */
.sm-table-wrap {
  background: var(--sm-card-bg);
  border-radius: var(--sm-radius);
  border: 1px solid var(--sm-border);
  overflow: hidden;
  box-shadow: var(--sm-shadow);
}

.table.sm-table { margin-bottom: 0; }
.table.sm-table thead th {
  background: var(--sm-bg);
  color: var(--sm-text-muted);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 700;
  border-bottom: 1px solid var(--sm-border);
  padding: 0.85rem 1rem;
  white-space: nowrap;
}

.table.sm-table tbody td {
  padding: 0.85rem 1rem;
  vertical-align: middle;
  border-bottom: 1px solid var(--sm-border);
  color: var(--sm-text);
}

.table.sm-table tbody tr:last-child td { border-bottom: none; }
.table.sm-table tbody tr:hover { background: var(--sm-bg); }

.sm-avatar-sm {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  object-fit: cover;
}

/* ---------- Buttons ---------- */
.btn-sm-primary {
  background: var(--sm-navy-800);
  border-color: var(--sm-navy-800);
  color: #fff;
}
.btn-sm-primary:hover { background: var(--sm-navy-700); border-color: var(--sm-navy-700); color: #fff; }

.btn-sm-danger {
  background: var(--sm-red-600);
  border-color: var(--sm-red-600);
  color: #fff;
}
.btn-sm-danger:hover { background: var(--sm-red-700); border-color: var(--sm-red-700); color: #fff; }

.btn-sm-outline {
  background: transparent;
  border: 1px solid var(--sm-border);
  color: var(--sm-text);
}
.btn-sm-outline:hover { background: var(--sm-bg); }

/* ---------- Badges / Status pills ---------- */
.sm-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.72rem;
  font-weight: 700;
  padding: 0.25rem 0.65rem;
  border-radius: 999px;
}
.sm-pill.success { background: #e6f7ee; color: #0d8a4b; }
.sm-pill.danger { background: var(--sm-red-100); color: var(--sm-red-600); }
.sm-pill.warning { background: #fff4e0; color: #a3650a; }
.sm-pill.info { background: #e6f1fb; color: var(--sm-navy-700); }
.sm-pill.neutral { background: var(--sm-bg); color: var(--sm-text-muted); }

[data-bs-theme="dark"] .sm-pill.success { background: rgba(13,138,75,0.18); }
[data-bs-theme="dark"] .sm-pill.danger { background: rgba(139,0,0,0.2); }
[data-bs-theme="dark"] .sm-pill.warning { background: rgba(163,101,10,0.2); }
[data-bs-theme="dark"] .sm-pill.info { background: rgba(20,83,116,0.25); }

/* ---------- Forms ---------- */
.form-control, .form-select {
  border-radius: var(--sm-radius-sm);
  border: 1px solid var(--sm-border);
  background: var(--sm-card-bg);
  color: var(--sm-text);
  padding: 0.55rem 0.85rem;
  font-size: 0.875rem;
}
.form-control:focus, .form-select:focus {
  border-color: var(--sm-navy-700);
  box-shadow: 0 0 0 0.2rem rgba(20, 83, 116, 0.15);
  background: var(--sm-card-bg);
  color: var(--sm-text);
}
.form-label { font-weight: 600; font-size: 0.82rem; color: var(--sm-text); margin-bottom: 0.35rem; }

/* ---------- Auth pages ---------- */
.sm-auth-wrap {
  min-height: 100vh;
  display: flex;
  background: var(--sm-bg);
}

.sm-auth-aside {
  flex: 1.1;
  background: radial-gradient(circle at top left, var(--sm-navy-700), var(--sm-navy-900) 65%);
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  overflow: hidden;
  padding: 3rem;
}

.sm-auth-aside::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at bottom right, rgba(139,0,0,0.45), transparent 60%);
}

.sm-auth-form-col {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
}

.sm-auth-card { width: 100%; max-width: 420px; }

/* ---------- Misc ---------- */
.sm-divider-text {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--sm-text-muted);
  font-size: 0.78rem;
}
.sm-divider-text::before, .sm-divider-text::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--sm-border);
}

.sm-fade-in { animation: smFadeIn 0.45s ease both; }
@keyframes smFadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* Mobile */
@media (max-width: 991.98px) {
  .sm-sidebar { transform: translateX(-100%); width: var(--sm-sidebar-w); }
  .sm-sidebar.mobile-open { transform: translateX(0); }
  .sm-main, .sm-main.collapsed { margin-left: 0; }
  .sm-search { display: none; }
}

.sm-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(6, 18, 38, 0.55);
  z-index: 1030;
}
.sm-overlay.show { display: block; }

/* Login required badge for verification page */
.sm-verify-icon {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: var(--sm-red-100);
  color: var(--sm-red-600);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  margin: 0 auto 1rem;
}