:root {
  --slate-950: #020617;
  --slate-900: #0f172a;
  --slate-850: #131c2e;
  --slate-800: #1e293b;
  --slate-750: #253347;
  --slate-700: #334155;
  --slate-600: #475569;
  --slate-500: #64748b;
  --slate-400: #94a3b8;
  --slate-300: #cbd5e1;
  --slate-200: #e2e8f0;

  --teal-300: #5eead4;
  --teal-400: #2dd4bf;
  --emerald-400: #34d399;
  --emerald-500: #10b981;

  --amber-400: #fbbf24;
  --amber-500: #f59e0b;
  --sky-400: #38bdf8;
  --red-300: #fca5a5;
  --red-400: #f87171;
  --red-500: #ef4444;

  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.25rem;
}

* { box-sizing: border-box; }
html, body, #admin-app { height: 100%; }

body {
  margin: 0;
  background: var(--slate-950);
  color: var(--slate-200);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}
button, input, select { font-family: inherit; color: inherit; }
button { cursor: pointer; }
a { color: inherit; }

/* ---------- Login ---------- */
.login-screen {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
}
.login-card {
  width: 100%;
  max-width: 22rem;
  background: var(--slate-900);
  border: 1px solid var(--slate-800);
  border-radius: var(--radius-2xl);
  padding: 2rem 1.75rem;
}
.logo {
  font-family: Georgia, serif;
  font-weight: 900;
  font-size: 2rem;
  background: linear-gradient(to bottom right, var(--teal-300), var(--emerald-500));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ---------- Layout general ---------- */
.admin-shell { min-height: 100vh; display: flex; }

.sidebar {
  width: 15.5rem;
  flex-shrink: 0;
  background: var(--slate-900);
  border-right: 1px solid var(--slate-800);
  display: flex;
  flex-direction: column;
  padding: 1.25rem 0.9rem;
}
.sidebar-header { display: flex; align-items: center; gap: 0.6rem; padding: 0 0.4rem 1.25rem; }
.sidebar-title { font-weight: 700; color: #fff; font-size: 0.95rem; }
.sidebar-sub { font-size: 0.7rem; color: var(--slate-500); }

.nav-item {
  display: flex; align-items: center; gap: 0.65rem;
  width: 100%;
  padding: 0.65rem 0.75rem;
  border: none; background: none;
  border-radius: var(--radius-lg);
  color: var(--slate-400);
  font-size: 0.85rem;
  font-weight: 500;
  text-align: left;
  margin-bottom: 0.2rem;
}
.nav-item:hover { background: var(--slate-850); color: var(--slate-200); }
.nav-item.active { background: var(--slate-800); color: var(--teal-400); }
.nav-item .icon { flex-shrink: 0; }

.sidebar-footer { margin-top: auto; padding-top: 0.75rem; border-top: 1px solid var(--slate-800); }

.main-area { flex: 1; min-width: 0; display: flex; flex-direction: column; }
.topbar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 1.1rem 1.75rem;
  border-bottom: 1px solid var(--slate-800);
}
.topbar h1 { font-size: 1.15rem; font-weight: 700; color: #fff; margin: 0; }
.topbar-sub { font-size: 0.78rem; color: var(--slate-500); margin-top: 0.15rem; }
.content { flex: 1; overflow-y: auto; padding: 1.5rem 1.75rem 3rem; }

/* ---------- Stat cards ---------- */
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(11.5rem, 1fr)); gap: 0.9rem; margin-bottom: 1.75rem; }
.stat-card {
  background: var(--slate-900);
  border: 1px solid var(--slate-800);
  border-radius: var(--radius-xl);
  padding: 1rem 1.1rem;
}
.stat-label { font-size: 0.72rem; color: var(--slate-500); margin-bottom: 0.35rem; }
.stat-value { font-size: 1.4rem; font-weight: 700; color: #fff; }
.stat-value.teal { color: var(--teal-400); }
.stat-value.amber { color: var(--amber-400); }
.stat-value.red { color: var(--red-400); }

/* ---------- Tables ---------- */
.table-wrap {
  background: var(--slate-900);
  border: 1px solid var(--slate-800);
  border-radius: var(--radius-xl);
  overflow: hidden;
}
table { width: 100%; border-collapse: collapse; font-size: 0.85rem; }
thead th {
  text-align: left;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--slate-500);
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--slate-800);
  background: var(--slate-850);
}
tbody td { padding: 0.75rem 1rem; border-bottom: 1px solid var(--slate-800); vertical-align: middle; }
tbody tr:last-child td { border-bottom: none; }
tbody tr:hover { background: var(--slate-850); }
.cell-muted { color: var(--slate-500); font-size: 0.78rem; }
.cell-strong { color: #fff; font-weight: 600; }
.table-empty { padding: 2.5rem 1rem; text-align: center; color: var(--slate-500); font-size: 0.85rem; }

/* ---------- Badges ---------- */
.badge { font-size: 0.7rem; font-weight: 600; padding: 0.22rem 0.6rem; border-radius: 999px; display: inline-block; white-space: nowrap; }
.badge-success { background: rgba(16, 185, 129, 0.15); color: var(--emerald-400); }
.badge-pending { background: rgba(245, 158, 11, 0.15); color: var(--amber-400); }
.badge-info { background: rgba(56, 189, 248, 0.15); color: var(--sky-400); }
.badge-danger { background: rgba(239, 68, 68, 0.15); color: var(--red-400); }
.badge-neutral { background: var(--slate-800); color: var(--slate-400); }

/* ---------- Buttons ---------- */
.btn {
  padding: 0.55rem 1rem;
  border-radius: var(--radius-lg);
  font-weight: 600;
  font-size: 0.82rem;
  border: none;
}
.btn-primary { color: var(--slate-950); background: linear-gradient(to right, var(--teal-400), var(--emerald-500)); }
.btn-primary:disabled { background: var(--slate-700); color: var(--slate-400); cursor: not-allowed; }
.btn-secondary { color: var(--slate-200); background: var(--slate-800); border: 1px solid var(--slate-700); }
.btn-danger { color: #fff; background: rgba(239, 68, 68, 0.15); border: 1px solid rgba(239, 68, 68, 0.35); color: var(--red-300); }
.btn-sm { padding: 0.35rem 0.7rem; font-size: 0.75rem; }
.btn-row { display: flex; gap: 0.5rem; flex-wrap: wrap; }
.link-btn { background: none; border: none; padding: 0; color: var(--teal-400); font-weight: 600; font-size: 0.82rem; }

/* ---------- Forms ---------- */
.field { display: block; margin-bottom: 0.9rem; }
.field-label { display: block; font-size: 0.72rem; font-weight: 500; color: var(--slate-400); margin-bottom: 0.3rem; }
.text-input, select.text-input, textarea.text-input {
  width: 100%;
  background: var(--slate-800);
  border: 1px solid var(--slate-700);
  border-radius: var(--radius-lg);
  padding: 0.55rem 0.75rem;
  font-size: 0.85rem;
  color: #fff;
  outline: none;
}
.text-input:focus { border-color: var(--teal-400); box-shadow: 0 0 0 1px var(--teal-400); }
.form-error { color: var(--red-400); font-size: 0.8rem; margin-bottom: 0.75rem; }
.form-grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 0 1rem; }

/* ---------- Cards / detail ---------- */
.card { background: var(--slate-900); border: 1px solid var(--slate-800); border-radius: var(--radius-2xl); padding: 1.1rem 1.25rem; }
.card + .card { margin-top: 1rem; }
.card-title { font-size: 0.95rem; font-weight: 700; color: #fff; margin: 0 0 0.75rem; }
.row { display: flex; justify-content: space-between; align-items: center; padding: 0.3rem 0; }
.row-label { font-size: 0.78rem; color: var(--slate-400); }
.row-value { font-size: 0.85rem; font-weight: 600; color: var(--slate-200); }
.divider { border-top: 1px solid var(--slate-800); margin: 0.5rem 0; }
.back-link { display: inline-flex; align-items: center; gap: 0.4rem; color: var(--slate-400); font-size: 0.82rem; background: none; border: none; padding: 0; margin-bottom: 1rem; }
.back-link:hover { color: #fff; }

/* ---------- Modal ---------- */
.modal-overlay {
  position: fixed; inset: 0; background: rgba(2, 6, 23, 0.7);
  display: flex; align-items: center; justify-content: center; padding: 1.5rem; z-index: 50;
}
.modal-box {
  background: var(--slate-900); border: 1px solid var(--slate-800);
  border-radius: var(--radius-2xl); padding: 1.5rem; width: 100%; max-width: 26rem;
  max-height: 90vh; overflow-y: auto;
}
.modal-title { font-size: 1.05rem; font-weight: 700; color: #fff; margin: 0 0 1rem; }

/* ---------- Toast / banner ---------- */
.banner {
  margin-bottom: 1rem;
  display: flex; align-items: center; justify-content: space-between; gap: 0.5rem;
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid rgba(239, 68, 68, 0.3);
  border-radius: var(--radius-lg);
  padding: 0.6rem 0.9rem;
  font-size: 0.8rem;
  color: var(--red-300);
}
.banner button { background: none; border: none; color: var(--red-300); }
.banner.success { background: rgba(16, 185, 129, 0.1); border-color: rgba(16, 185, 129, 0.3); color: var(--emerald-400); }

/* ---------- Pay table inline ---------- */
.pay-mini-row { display: flex; align-items: center; justify-content: space-between; padding: 0.5rem 0; border-bottom: 1px solid var(--slate-800); font-size: 0.82rem; }
.pay-mini-row:last-child { border-bottom: none; }

/* ---------- Receipt (printable) ---------- */
.receipt-box {
  background: #fff; color: #111;
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  font-size: 0.85rem;
}
.receipt-box h2 { margin: 0 0 0.1rem; font-size: 1.1rem; }
.receipt-box .muted { color: #555; font-size: 0.78rem; }
.receipt-row { display: flex; justify-content: space-between; padding: 0.3rem 0; border-bottom: 1px dashed #ddd; }
.receipt-row.total { font-weight: 700; border-bottom: none; border-top: 2px solid #111; margin-top: 0.4rem; padding-top: 0.5rem; }

@media print {
  body * { visibility: hidden; }
  #print-area, #print-area * { visibility: visible; }
  #print-area { position: absolute; top: 0; left: 0; width: 100%; }
}

/* ---------- Responsive ---------- */
@media (max-width: 860px) {
  .admin-shell { flex-direction: column; }
  .sidebar { width: 100%; flex-direction: row; align-items: center; overflow-x: auto; padding: 0.75rem; }
  .sidebar-header { padding: 0 0.75rem 0 0; }
  .sidebar-footer { margin-top: 0; padding-top: 0; border-top: none; margin-left: auto; }
  .nav-item { white-space: nowrap; }
  .form-grid-2 { grid-template-columns: 1fr; }
}