/* Remedials School Management System - Design System */
@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@300;400;500;600;700;800&family=DM+Serif+Display:ital@0;1&display=swap');

:root {
  --primary: #1a4f8a;
  --primary-light: #2563b0;
  --primary-dark: #0f2f5a;
  --accent: #f59e0b;
  --accent-light: #fbbf24;
  --success: #059669;
  --danger: #dc2626;
  --warning: #d97706;
  --info: #0891b2;
  --bg: #f0f4f8;
  --surface: #ffffff;
  --surface2: #f8fafc;
  --border: #e2e8f0;
  --text: #0f172a;
  --text-muted: #64748b;
  --text-light: #94a3b8;
  --sidebar-w: 260px;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 1px 3px rgba(0,0,0,.08), 0 4px 16px rgba(0,0,0,.06);
  --shadow-md: 0 4px 12px rgba(0,0,0,.1), 0 8px 32px rgba(0,0,0,.08);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: 'Plus Jakarta Sans', sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ── SIDEBAR ─────────────────────────────── */
.sidebar {
  position: fixed;
  top: 0; left: 0;
  width: var(--sidebar-w);
  height: 100vh;
  background: var(--primary-dark);
  display: flex;
  flex-direction: column;
  z-index: 1000;
  transition: transform .3s cubic-bezier(.4,0,.2,1);
  overflow-y: auto;
}

.sidebar-brand {
  padding: 24px 20px;
  border-bottom: 1px solid rgba(255,255,255,.1);
}
.sidebar-brand .brand-logo {
  width: 40px; height: 40px;
  background: var(--accent);
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-size: 18px; font-weight: 800; color: var(--primary-dark);
  margin-bottom: 10px;
}
.sidebar-brand h1 {
  font-size: 15px; font-weight: 700;
  color: #fff; letter-spacing: -.2px; line-height: 1.3;
}
.sidebar-brand p { font-size: 11px; color: rgba(255,255,255,.45); font-weight: 500; }

.sidebar-nav { padding: 16px 12px; flex: 1; }
.nav-section-label {
  font-size: 10px; font-weight: 700; letter-spacing: 1px;
  text-transform: uppercase; color: rgba(255,255,255,.3);
  padding: 8px 8px 4px;
}
.sidebar-nav a {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 12px; border-radius: var(--radius-sm);
  color: rgba(255,255,255,.65);
  text-decoration: none; font-size: 13.5px; font-weight: 500;
  margin-bottom: 2px;
  transition: all .2s;
}
.sidebar-nav a:hover,
.sidebar-nav a.active {
  background: rgba(255,255,255,.1);
  color: #fff;
}
.sidebar-nav a.active {
  background: var(--accent);
  color: var(--primary-dark);
  font-weight: 600;
}
.sidebar-nav a .nav-icon { font-size: 16px; width: 20px; text-align: center; }

.sidebar-footer {
  padding: 16px 12px;
  border-top: 1px solid rgba(255,255,255,.1);
}
.sidebar-footer a {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 12px; border-radius: var(--radius-sm);
  color: rgba(255,255,255,.5);
  text-decoration: none; font-size: 13px; font-weight: 500;
  transition: all .2s;
}
.sidebar-footer a:hover { background: rgba(220,38,38,.2); color: #fca5a5; }

/* ── TOPBAR ──────────────────────────────── */
.topbar {
  position: fixed;
  top: 0; left: var(--sidebar-w); right: 0;
  height: 64px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center;
  padding: 0 24px;
  z-index: 900;
  gap: 12px;
}
.topbar-hamburger {
  display: none;
  background: none; border: none;
  cursor: pointer; padding: 6px;
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  font-size: 20px;
  transition: background .2s;
}
.topbar-hamburger:hover { background: var(--bg); }
.topbar-title { font-size: 16px; font-weight: 700; color: var(--text); flex: 1; }
.topbar-user {
  display: flex; align-items: center; gap: 10px;
  padding: 6px 12px;
  border-radius: 40px;
  background: var(--bg);
  cursor: pointer;
}
.topbar-avatar {
  width: 32px; height: 32px;
  background: var(--primary);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 12px; font-weight: 700; color: #fff;
}
.topbar-username { font-size: 13px; font-weight: 600; color: var(--text); }
.topbar-role { font-size: 11px; color: var(--text-muted); }

/* ── MAIN CONTENT ────────────────────────── */
.main-content {
  margin-left: var(--sidebar-w);
  padding-top: 64px;
  min-height: 100vh;
}
.page-body { padding: 28px 28px; }

/* ── PAGE HEADER ─────────────────────────── */
.page-header {
  margin-bottom: 24px;
}
.page-header h2 {
  font-size: 22px; font-weight: 800; color: var(--text);
  letter-spacing: -.4px;
}
.page-header p { color: var(--text-muted); font-size: 13.5px; margin-top: 2px; }

/* ── CARDS ───────────────────────────────── */
.card {
  background: var(--surface);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}
.card-header {
  padding: 18px 20px 14px;
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center; gap: 12px;
}
.card-header h5 {
  font-size: 14px; font-weight: 700; color: var(--text); flex: 1;
}
.card-body { padding: 20px; }

/* Stat cards */
.stat-card {
  background: var(--surface);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  padding: 20px;
  box-shadow: var(--shadow);
  display: flex; align-items: flex-start; gap: 16px;
}
.stat-icon {
  width: 48px; height: 48px;
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  font-size: 22px;
  flex-shrink: 0;
}
.stat-icon.blue { background: #eff6ff; color: var(--primary); }
.stat-icon.amber { background: #fffbeb; color: var(--accent); }
.stat-icon.green { background: #ecfdf5; color: var(--success); }
.stat-icon.red { background: #fef2f2; color: var(--danger); }
.stat-info { flex: 1; }
.stat-value { font-size: 26px; font-weight: 800; color: var(--text); line-height: 1; }
.stat-label { font-size: 12px; color: var(--text-muted); font-weight: 500; margin-top: 4px; }

/* ── FORMS ───────────────────────────────── */
.form-label { font-size: 12.5px; font-weight: 600; color: var(--text-muted); margin-bottom: 6px; display: block; }
.form-control, .form-select {
  width: 100%;
  padding: 10px 14px;
  font-size: 13.5px;
  font-family: inherit;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface);
  color: var(--text);
  transition: border-color .2s, box-shadow .2s;
  outline: none;
}
.form-control:focus, .form-select:focus {
  border-color: var(--primary-light);
  box-shadow: 0 0 0 3px rgba(37,99,176,.12);
}
.form-control::placeholder { color: var(--text-light); }

/* ── BUTTONS ─────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 9px 18px;
  font-size: 13px; font-family: inherit;
  font-weight: 600; border-radius: var(--radius-sm);
  cursor: pointer; border: 1.5px solid transparent;
  text-decoration: none;
  transition: all .2s;
  white-space: nowrap;
}
.btn-primary { background: var(--primary); color: #fff; border-color: var(--primary); }
.btn-primary:hover { background: var(--primary-light); border-color: var(--primary-light); }
.btn-success { background: var(--success); color: #fff; border-color: var(--success); }
.btn-success:hover { background: #047857; border-color: #047857; }
.btn-danger { background: var(--danger); color: #fff; border-color: var(--danger); }
.btn-danger:hover { background: #b91c1c; border-color: #b91c1c; }
.btn-outline { background: transparent; color: var(--primary); border-color: var(--border); }
.btn-outline:hover { background: var(--bg); border-color: var(--primary); }
.btn-sm { padding: 5px 10px; font-size: 12px; }
.btn-icon { padding: 8px; }

/* ── TABLES ──────────────────────────────── */
.table-wrap { overflow-x: auto; border-radius: var(--radius); border: 1px solid var(--border); }
.table {
  width: 100%; border-collapse: collapse;
  background: var(--surface);
  border-radius: var(--radius); overflow: hidden;
}
.table thead th {
  padding: 12px 16px;
  font-size: 11px; font-weight: 700; text-transform: uppercase;
  letter-spacing: .6px; color: var(--text-muted);
  background: var(--surface2);
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}
.table tbody td {
  padding: 13px 16px;
  font-size: 13.5px; color: var(--text);
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
}
.table tbody tr:last-child td { border-bottom: none; }
.table tbody tr:hover td { background: var(--surface2); }

/* ── BADGES ──────────────────────────────── */
.badge {
  display: inline-flex; align-items: center;
  padding: 3px 9px;
  border-radius: 20px;
  font-size: 11px; font-weight: 600;
}
.badge-blue { background: #eff6ff; color: var(--primary); }
.badge-green { background: #ecfdf5; color: var(--success); }
.badge-red { background: #fef2f2; color: var(--danger); }
.badge-amber { background: #fffbeb; color: var(--warning); }

/* ── ALERTS ──────────────────────────────── */
.alert {
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  font-size: 13px; font-weight: 500;
  border-left: 4px solid;
  margin-bottom: 16px;
}
.alert-danger { background: #fef2f2; color: var(--danger); border-color: var(--danger); }
.alert-success { background: #ecfdf5; color: var(--success); border-color: var(--success); }
.alert-info { background: #f0f9ff; color: var(--info); border-color: var(--info); }

/* ── GRID ────────────────────────────────── */
.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); }

/* ── OVERLAY (mobile sidebar) ─────────────── */
.sidebar-overlay {
  display: none;
  position: fixed; inset: 0;
  background: rgba(0,0,0,.5);
  z-index: 999;
}

/* ── MOBILE RESPONSIVE ───────────────────── */
@media (max-width: 768px) {
  :root { --sidebar-w: 260px; }

  .sidebar {
    transform: translateX(-100%);
  }
  .sidebar.open {
    transform: translateX(0);
    box-shadow: var(--shadow-md);
  }
  .sidebar-overlay.open { display: block; }

  .topbar { left: 0; padding: 0 16px; }
  .topbar-hamburger { display: flex; }
  .topbar-username { display: none; }

  .main-content { margin-left: 0; }
  .page-body { padding: 16px; }

  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }

  .table thead { display: none; }
  .table tbody tr {
    display: block;
    margin-bottom: 12px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    overflow: hidden;
  }
  .table tbody td {
    display: flex; justify-content: space-between; align-items: center;
    padding: 10px 14px;
    border-bottom: 1px solid var(--border);
  }
  .table tbody td::before {
    content: attr(data-label);
    font-size: 11px; font-weight: 700; text-transform: uppercase;
    letter-spacing: .5px; color: var(--text-muted);
    margin-right: 8px;
  }
  .table tbody tr:last-child { margin-bottom: 0; }
  .table-wrap { border: none; }
  .table { border-radius: 0; }
}

@media (max-width: 480px) {
  .page-header h2 { font-size: 18px; }
  .stat-value { font-size: 22px; }
}