:root {
  --primary: #1e4d8b;
  --primary-dark: #163a68;
  --accent: #f2a900;
  --bg: #f4f6f9;
  --card-bg: #ffffff;
  --text: #1f2937;
  --muted: #6b7280;
  --border: #e5e7eb;
  --success: #16a34a;
  --danger: #dc2626;
  --radius: 10px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: 'Segoe UI', Roboto, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
}

a { color: var(--primary); text-decoration: none; }

/* ---------- Top bar ---------- */
.topbar {
  background: linear-gradient(90deg, var(--primary), var(--primary-dark));
  color: #fff;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  box-shadow: 0 2px 6px rgba(0,0,0,0.15);
}

.topbar .brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  font-size: 18px;
}

.topbar .brand span.badge {
  background: var(--accent);
  color: #1f2937;
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 20px;
  font-weight: 700;
  letter-spacing: 0.5px;
}

.topbar .user-info {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 14px;
}

.topbar button.logout {
  background: rgba(255,255,255,0.15);
  border: 1px solid rgba(255,255,255,0.4);
  color: #fff;
  padding: 6px 14px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 13px;
}
.topbar button.logout:hover { background: rgba(255,255,255,0.3); }

/* ---------- Layout ---------- */
.app-layout { display: flex; min-height: calc(100vh - 58px); }

.sidebar {
  width: 220px;
  background: #fff;
  border-right: 1px solid var(--border);
  padding: 18px 0;
  flex-shrink: 0;
}

.sidebar button.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  text-align: left;
  background: none;
  border: none;
  padding: 12px 22px;
  font-size: 14.5px;
  color: var(--text);
  cursor: pointer;
  border-left: 3px solid transparent;
}
.sidebar button.nav-item:hover { background: #f0f4fa; }
.sidebar button.nav-item.active {
  background: #eaf1fc;
  border-left: 3px solid var(--primary);
  color: var(--primary);
  font-weight: 600;
}

main.content { flex: 1; padding: 24px; overflow-x: auto; }

.page { display: none; }
.page.active { display: block; }

.page-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 18px;
  flex-wrap: wrap;
  gap: 10px;
}
.page-header h2 { margin: 0; font-size: 22px; }

/* ---------- Cards / Stats ---------- */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}
.stat-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 18px 20px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.08);
  border-left: 4px solid var(--primary);
}
.stat-card h3 { margin: 0 0 6px; font-size: 13px; color: var(--muted); font-weight: 600; text-transform: uppercase; letter-spacing: 0.4px; }
.stat-card .value { font-size: 26px; font-weight: 700; color: var(--primary-dark); }

.card {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.08);
  margin-bottom: 20px;
}

/* ---------- Buttons ---------- */
button.btn {
  background: var(--primary);
  color: #fff;
  border: none;
  padding: 9px 16px;
  border-radius: 6px;
  font-size: 14px;
  cursor: pointer;
  font-weight: 500;
}
button.btn:hover { background: var(--primary-dark); }
button.btn.secondary { background: #fff; color: var(--primary); border: 1px solid var(--primary); }
button.btn.danger { background: var(--danger); }
button.btn.danger:hover { background: #b91c1c; }
button.btn.small { padding: 5px 10px; font-size: 12.5px; }
button.btn:disabled { opacity: 0.6; cursor: not-allowed; }

/* ---------- Forms ---------- */
input, select, textarea {
  width: 100%;
  padding: 9px 11px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 14px;
  font-family: inherit;
  background: #fff;
}
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--primary); }

.form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px;
}
.form-group { display: flex; flex-direction: column; gap: 5px; }
.form-group label { font-size: 13px; color: var(--muted); font-weight: 600; }

/* ---------- Table ---------- */
table { width: 100%; border-collapse: collapse; font-size: 14px; }
thead th {
  text-align: left;
  padding: 10px 12px;
  background: #f0f4fa;
  color: var(--primary-dark);
  font-weight: 600;
  border-bottom: 2px solid var(--border);
  white-space: nowrap;
}
tbody td { padding: 10px 12px; border-bottom: 1px solid var(--border); }
tbody tr:hover { background: #fafbfd; }

.badge-status {
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
}
.badge-status.Present, .badge-status.Paid { background: #dcfce7; color: var(--success); }
.badge-status.Absent { background: #fee2e2; color: var(--danger); }
.badge-status.Leave, .badge-status.Pending { background: #fef3c7; color: #b45309; }

.toolbar {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 14px;
  align-items: center;
}
.toolbar input, .toolbar select { width: auto; min-width: 160px; }

/* ---------- Modal ---------- */
.modal-overlay {
  display: none;
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.45);
  align-items: center; justify-content: center;
  z-index: 100;
  padding: 16px;
}
.modal-overlay.active { display: flex; }
.modal {
  background: #fff;
  border-radius: var(--radius);
  padding: 24px;
  width: 100%;
  max-width: 520px;
  max-height: 90vh;
  overflow-y: auto;
}
.modal h3 { margin-top: 0; }
.modal-actions { display: flex; justify-content: flex-end; gap: 10px; margin-top: 18px; }

/* ---------- Login page ---------- */
.login-wrap {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  padding: 16px;
}
.login-card {
  background: #fff;
  border-radius: 14px;
  padding: 36px 32px;
  width: 100%;
  max-width: 380px;
  box-shadow: 0 10px 40px rgba(0,0,0,0.25);
}
.login-card .logo {
  text-align: center;
  margin-bottom: 18px;
}
.login-card .logo .icon {
  width: 56px; height: 56px;
  background: var(--primary);
  color: #fff;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 26px;
  margin: 0 auto 10px;
}
.login-card h1 { text-align: center; font-size: 19px; margin: 0 0 2px; }
.login-card p.sub { text-align: center; color: var(--muted); font-size: 13px; margin: 0 0 22px; }
.login-card .form-group { margin-bottom: 14px; }
.login-card button.btn { width: 100%; padding: 11px; margin-top: 6px; }
.error-msg {
  background: #fee2e2; color: var(--danger);
  padding: 9px 12px; border-radius: 6px; font-size: 13px; margin-bottom: 14px;
  display: none;
}
.error-msg.active { display: block; }
.hint {
  text-align: center; font-size: 12px; color: var(--muted); margin-top: 16px;
}

.empty-state { text-align: center; padding: 40px 20px; color: var(--muted); }

.spinner {
  border: 3px solid #e5e7eb;
  border-top: 3px solid var(--primary);
  border-radius: 50%;
  width: 22px; height: 22px;
  animation: spin 0.7s linear infinite;
  margin: 20px auto;
}
@keyframes spin { to { transform: rotate(360deg); } }

@media (max-width: 720px) {
  .app-layout { flex-direction: column; }
  .sidebar { width: 100%; display: flex; overflow-x: auto; padding: 8px; }
  .sidebar button.nav-item { border-left: none; border-bottom: 3px solid transparent; white-space: nowrap; }
  .sidebar button.nav-item.active { border-left: none; border-bottom: 3px solid var(--primary); }
}