/* ==========================================================================
   Student Report Card Management System — main stylesheet
   ========================================================================== */
:root {
  --src-primary: #0d3b66;
  --src-primary-2: #14549a;
  --src-accent: #f4a261;
  --src-bg: #f2f5fa;
  --src-sidebar-w: 250px;
}

body {
  background: var(--src-bg);
  font-family: "Segoe UI", system-ui, -apple-system, Arial, sans-serif;
  min-height: 100vh;
}

/* ---------- Top bar ---------- */
.app-topbar {
  background: linear-gradient(90deg, var(--src-primary), var(--src-primary-2));
  box-shadow: 0 2px 6px rgba(13, 59, 102, .35);
}
.app-topbar .navbar-brand { letter-spacing: .3px; }

/* ---------- Layout ---------- */
.app-wrapper { display: flex; min-height: calc(100vh - 56px); }
#sidebarNav { flex: 0 0 auto; }
@media (min-width: 992px) {
  #sidebarNav { display: flex !important; }
}
.app-sidebar {
  width: var(--src-sidebar-w);
  background: #fff;
  border-right: 1px solid #e3e8f0;
  min-height: 100%;
}
.sidebar-inner { position: sticky; top: 0; }
.app-sidebar .nav-link {
  color: #33415c;
  border-radius: .5rem;
  padding: .5rem .75rem;
  font-weight: 500;
}
.app-sidebar .nav-link:hover { background: #eef3fb; color: var(--src-primary); }
.app-sidebar .nav-link.active {
  background: linear-gradient(90deg, var(--src-primary), var(--src-primary-2));
  color: #fff;
}
.sidebar-heading { letter-spacing: .08em; }
.main-content { flex: 1 1 auto; min-width: 0; }

/* ---------- Cards ---------- */
.card { border: 1px solid #e3e8f0; border-radius: .75rem; }
.card-header {
  background: #fff;
  border-bottom: 1px solid #e9edf5;
  font-weight: 600;
}
.stat-card { border-left: 4px solid var(--src-primary); }
.stat-card .stat-icon {
  width: 48px; height: 48px; border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.4rem; color: #fff;
  background: linear-gradient(135deg, var(--src-primary), var(--src-primary-2));
}
.stat-card h3 { margin: 0; font-weight: 700; }

/* ---------- Tables ---------- */
.table thead th {
  background: #f0f4fb;
  color: #253551;
  font-size: .82rem;
  text-transform: uppercase;
  letter-spacing: .04em;
  white-space: nowrap;
}
.table-sm td, .table-sm th { padding: .45rem .5rem; }

/* ---------- Forms ---------- */
.form-label { font-weight: 600; font-size: .9rem; color: #33415c; }
.required::after { content: " *"; color: #dc3545; }
.btn-primary { background: var(--src-primary); border-color: var(--src-primary); }
.btn-primary:hover { background: var(--src-primary-2); border-color: var(--src-primary-2); }
.btn-outline-primary { color: var(--src-primary); border-color: var(--src-primary); }
.btn-outline-primary:hover { background: var(--src-primary); border-color: var(--src-primary); }

/* ---------- Login page ---------- */
.login-hero {
  min-height: 100vh;
  display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, #0d3b66 0%, #14549a 55%, #1b6ec2 100%);
  padding: 24px 12px;
}
.login-card {
  width: 100%; max-width: 430px;
  border: 0; border-radius: 1rem;
  box-shadow: 0 18px 50px rgba(0, 0, 0, .35);
}
.login-logo {
  width: 74px; height: 74px; margin: 0 auto;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, var(--src-primary), var(--src-accent));
  color: #fff; font-size: 2rem;
}

/* ---------- Marks entry grid ---------- */
.marks-input { max-width: 110px; text-align: center; font-weight: 600; }
.marks-input.is-invalid { border-color: #dc3545; box-shadow: 0 0 0 .2rem rgba(220, 53, 69, .2); }
.marks-cell-total { font-weight: 700; color: var(--src-primary); }

/* ---------- Report card print ---------- */
.rc-sheet {
  background: #fff; color: #000;
  max-width: 900px; margin: 0 auto;
  padding: 26px 30px;
  border: 1px solid #ccc;
}
.rc-school-header { display: flex; align-items: center; gap: 14px; border-bottom: 3px double #333; padding-bottom: 10px; }
.rc-logo { width: 78px; height: 78px; object-fit: contain; }
.rc-school-name { font-size: 1.5rem; font-weight: 800; letter-spacing: .5px; margin: 0; }
.rc-school-sub { font-size: .85rem; margin: 2px 0 0; }
.rc-title {
  text-align: center; font-weight: 700;
  background: #eef3fb; border: 1px solid #333;
  padding: 4px; margin: 12px 0;
  letter-spacing: 2px;
}
.rc-photo {
  width: 92px; height: 110px; object-fit: cover;
  border: 1px solid #333;
}
.rc-table { width: 100%; border-collapse: collapse; font-size: .9rem; }
.rc-table th, .rc-table td { border: 1px solid #333; padding: 5px 8px; }
.rc-table thead th { background: #dce9f7; text-align: center; }
.rc-info td { padding: 3px 8px; font-size: .9rem; }
.rc-sign-row { display: flex; justify-content: space-between; gap: 12px; margin-top: 42px; text-align: center; font-size: .85rem; }
.rc-sign-row > div { flex: 1; border-top: 1px solid #333; padding-top: 4px; }
.rc-stamp { position: absolute; opacity: .85; }
.rc-result-band {
  border: 2px solid #333; padding: 8px 12px; margin-top: 14px;
  display: flex; justify-content: space-between; font-weight: 700; font-size: .95rem;
  flex-wrap: wrap; gap: 6px;
}
.rc-footer { margin-top: 12px; font-size: .8rem; color: #333; text-align: center; border-top: 1px solid #999; padding-top: 6px; }

/* Consolidated (two-page side-by-side) format */
.rc-consolidated { display: grid; grid-template-columns: 1fr; gap: 18px; }
@media (min-width: 1100px) {
  .rc-consolidated { grid-template-columns: 1fr 1fr; }
}
.rc-page { background: #fff; border: 1px solid #333; padding: 14px 16px; font-size: .82rem; }
.rc-page h6 { font-weight: 700; text-align: center; margin: 6px 0 10px; }
.rc-mini-table { width: 100%; border-collapse: collapse; }
.rc-mini-table th, .rc-mini-table td { border: 1px solid #333; padding: 3px 6px; font-size: .78rem; }
.rc-mini-table thead th { background: #dce9f7; text-align: center; font-size: .72rem; }
.rc-mini-table .hl td { background: #7fb3d5; font-weight: 700; }

@media print {
  body { background: #fff !important; }
  .app-topbar, .app-sidebar, #sidebarNav, footer, .no-print, .btn, .alert {
    display: none !important;
  }
  .app-wrapper { display: block; min-height: 0; }
  .main-content, .container-fluid { padding: 0 !important; margin: 0 !important; }
  .rc-sheet, .rc-page { border: 1px solid #333; box-shadow: none !important; page-break-inside: avoid; }
  .rc-sheet { max-width: 100%; width: 100%; }
  @page { size: A4 portrait; margin: 10mm; }
  .print-landscape @page { size: A4 landscape; }
}

@media (max-width: 991px) {
  .app-sidebar { width: 100%; border-right: 0; border-bottom: 1px solid #e3e8f0; }
}