:root {
  --bg: #f4f6fb;
  --surface: #ffffff;
  --border: #e3e8f0;
  --text: #1f2a37;
  --muted: #6b7280;
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --danger: #dc2626;
  --success: #16a34a;
  --sidebar: #111827;
  --sidebar-text: #cbd5e1;
  --radius: 10px;
  --shadow: 0 1px 3px rgba(16, 24, 40, 0.08), 0 1px 2px rgba(16, 24, 40, 0.06);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
  line-height: 1.5;
}

h1, h2, h3 {
  margin: 0;
  font-weight: 600;
}

a {
  color: inherit;
  text-decoration: none;
}

.muted {
  color: var(--muted);
}

.hidden {
  display: none !important;
}

/* ---------- Login ---------- */
.auth-body {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #1e3a8a 0%, #2563eb 100%);
  padding: 20px;
}

.auth-card {
  width: 100%;
  max-width: 380px;
  background: var(--surface);
  border-radius: 14px;
  padding: 32px;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
}

.auth-card .brand {
  font-size: 22px;
  margin-bottom: 4px;
}

.auth-card form {
  margin-top: 22px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

/* ---------- Layout ---------- */
.layout {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  width: 240px;
  background: var(--sidebar);
  color: var(--sidebar-text);
  display: flex;
  flex-direction: column;
  padding: 20px 16px;
  flex-shrink: 0;
}

.sidebar-brand {
  font-size: 18px;
  font-weight: 700;
  color: #fff;
  padding: 6px 10px 20px;
}

.nav {
  display: flex;
  flex-direction: column;
  gap: 4px;
  flex: 1;
}

.nav-link {
  padding: 10px 12px;
  border-radius: 8px;
  color: var(--sidebar-text);
  font-weight: 500;
  transition: background 0.15s, color 0.15s;
}

.nav-link:hover {
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
}

.nav-link.active {
  background: var(--primary);
  color: #fff;
}

.sidebar-footer {
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  padding-top: 14px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.user-name {
  color: #fff;
  font-weight: 600;
}

.user-role {
  font-size: 12px;
  color: #94a3b8;
  text-transform: capitalize;
}

.main {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.topbar {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 16px 24px;
}

.content {
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

/* ---------- Card ---------- */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 20px;
}

.card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

/* ---------- Stats ---------- */
.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
}

.stat {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow);
}

.stat-label {
  color: var(--muted);
  font-size: 13px;
}

.stat-value {
  font-size: 30px;
  font-weight: 700;
  margin-top: 6px;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  border: 1px solid transparent;
  border-radius: 8px;
  padding: 9px 16px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s, border 0.15s, color 0.15s;
  font-family: inherit;
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
}

.btn-primary:hover:not(:disabled) {
  background: var(--primary-dark);
}

.btn-ghost {
  background: transparent;
  border-color: var(--border);
  color: var(--text);
}

.sidebar .btn-ghost {
  border-color: rgba(255, 255, 255, 0.25);
  color: var(--sidebar-text);
}

.btn-ghost:hover:not(:disabled) {
  background: rgba(0, 0, 0, 0.04);
}

.sidebar .btn-ghost:hover:not(:disabled) {
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
}

.btn-danger {
  background: transparent;
  border-color: transparent;
  color: var(--danger);
  padding: 6px 10px;
}

.btn-danger:hover:not(:disabled) {
  background: rgba(220, 38, 38, 0.08);
}

.btn-edit {
  background: transparent;
  border-color: transparent;
  color: var(--primary);
  padding: 6px 10px;
}

.btn-edit:hover:not(:disabled) {
  background: rgba(37, 99, 235, 0.08);
}

.btn-block {
  width: 100%;
}

/* ---------- Form ---------- */
.field {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-weight: 500;
}

.field span {
  font-size: 13px;
}

input, select, textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
  font-family: inherit;
  color: var(--text);
  background: #fff;
}

input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
}

.search {
  max-width: 280px;
}

/* ---------- Table ---------- */
.table-wrap {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
}

th, td {
  text-align: left;
  padding: 12px 14px;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}

th {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--muted);
  background: #f9fafb;
}

tbody tr:hover {
  background: #f9fafb;
}

.badge {
  display: inline-block;
  padding: 3px 9px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  background: #eef2ff;
  color: #3730a3;
}

.badge-muted {
  background: #f3f4f6;
  color: var(--muted);
}

.empty {
  text-align: center;
  color: var(--muted);
  padding: 28px;
}

/* ---------- Modal ---------- */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(17, 24, 39, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  z-index: 50;
}

.modal {
  width: 100%;
  max-width: 460px;
  background: var(--surface);
  border-radius: 12px;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.25);
  display: flex;
  flex-direction: column;
  max-height: 90vh;
}

.modal-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
}

.modal-body {
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  overflow-y: auto;
}

.modal-foot {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  padding: 16px 20px;
  border-top: 1px solid var(--border);
}

.icon-btn {
  border: none;
  background: transparent;
  font-size: 22px;
  line-height: 1;
  cursor: pointer;
  color: var(--muted);
}

/* ---------- Toast ---------- */
.toast-wrap {
  position: fixed;
  top: 20px;
  right: 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  z-index: 100;
}

.toast {
  padding: 12px 16px;
  border-radius: 8px;
  color: #fff;
  font-weight: 500;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.18);
  transition: opacity 0.3s, transform 0.3s;
}

.toast-success {
  background: var(--success);
}

.toast-error {
  background: var(--danger);
}

.toast-hide {
  opacity: 0;
  transform: translateX(20px);
}

.alert {
  margin-top: 16px;
  padding: 10px 12px;
  border-radius: 8px;
  background: rgba(220, 38, 38, 0.1);
  color: var(--danger);
  font-size: 13px;
}

@media (max-width: 720px) {
  .layout {
    flex-direction: column;
  }
  .sidebar {
    width: 100%;
  }
  .search {
    max-width: 100%;
  }
}