@import url('https://fonts.googleapis.com/css2?family=Sarabun:wght@300;400;500;600;700&display=swap');

:root {
  --primary: #2c3e50;
  --primary-light: #34495e;
  --accent: #3498db;
  --accent-dark: #2980b9;
  --success: #27ae60;
  --warning: #f39c12;
  --danger: #e74c3c;
  --info: #17a2b8;
  --bg: #f5f6fa;
  --card-bg: #ffffff;
  --text: #2c3e50;
  --text-light: #7f8c8d;
  --border: #dcdde1;
  --shadow: 0 2px 8px rgba(0,0,0,0.08);
  --radius: 10px;
}

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

body {
  font-family: 'Sarabun', sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

/* ===== NAVBAR ===== */
.navbar {
  background: var(--primary);
  color: #fff;
  padding: 0 24px;
  display: flex;
  align-items: center;
  height: 60px;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.navbar .logo {
  font-size: 1.2rem;
  font-weight: 700;
  margin-right: 32px;
  white-space: nowrap;
  cursor: pointer;
  text-decoration: none;
  color: #fff;
}

.navbar .nav-links {
  display: flex;
  gap: 4px;
  flex: 1;
  overflow-x: auto;
}

.navbar .nav-links a {
  color: rgba(255,255,255,0.7);
  text-decoration: none;
  padding: 8px 14px;
  border-radius: 6px;
  font-size: 0.9rem;
  font-weight: 500;
  white-space: nowrap;
  transition: all 0.2s;
}

.navbar .nav-links a:hover,
.navbar .nav-links a.active {
  background: rgba(255,255,255,0.15);
  color: #fff;
}

.navbar .nav-right {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-left: auto;
}

.navbar .user-info {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.8);
}

.navbar .btn-logout {
  background: rgba(255,255,255,0.15);
  color: #fff;
  border: none;
  padding: 6px 14px;
  border-radius: 6px;
  cursor: pointer;
  font-family: inherit;
  font-size: 0.85rem;
}

.navbar .btn-logout:hover {
  background: var(--danger);
}

.notif-badge {
  background: var(--danger);
  color: #fff;
  border-radius: 50%;
  font-size: 0.7rem;
  padding: 2px 6px;
  margin-left: -8px;
  font-weight: 700;
}

/* ===== LAYOUT ===== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px;
}

.page-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 20px;
  color: var(--primary);
}

/* ===== CARDS ===== */
.card {
  background: var(--card-bg);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 20px;
  margin-bottom: 20px;
}

.card-header {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* ===== STAT CARDS ===== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.stat-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 20px;
  text-align: center;
  border-top: 4px solid var(--accent);
}

.stat-card.success { border-top-color: var(--success); }
.stat-card.warning { border-top-color: var(--warning); }
.stat-card.danger { border-top-color: var(--danger); }
.stat-card.info { border-top-color: var(--info); }

.stat-card .stat-value {
  font-size: 2rem;
  font-weight: 700;
  color: var(--primary);
}

.stat-card .stat-label {
  font-size: 0.85rem;
  color: var(--text-light);
  margin-top: 4px;
}

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 18px;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  font-family: inherit;
  font-size: 0.9rem;
  font-weight: 500;
  transition: all 0.2s;
  text-decoration: none;
}

.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-dark); }
.btn-success { background: var(--success); color: #fff; }
.btn-success:hover { background: #219a52; }
.btn-warning { background: var(--warning); color: #fff; }
.btn-warning:hover { background: #e08e0b; }
.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { background: #c0392b; }
.btn-secondary { background: #95a5a6; color: #fff; }
.btn-secondary:hover { background: #7f8c8d; }
.btn-sm { padding: 4px 12px; font-size: 0.8rem; }
.btn-outline {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
}
.btn-outline:hover { background: var(--bg); }

/* ===== FORMS ===== */
.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  font-weight: 500;
  margin-bottom: 6px;
  font-size: 0.9rem;
}

.form-control {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-family: inherit;
  font-size: 0.95rem;
  transition: border-color 0.2s;
  background: #fff;
}

.form-control:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(52,152,219,0.1);
}

select.form-control {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%237f8c8d' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 32px;
}

.form-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
}

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

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

thead th {
  background: var(--bg);
  padding: 10px 12px;
  text-align: left;
  font-weight: 600;
  white-space: nowrap;
  border-bottom: 2px solid var(--border);
}

tbody td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
}

tbody tr:hover {
  background: rgba(52,152,219,0.04);
}

/* ===== STATUS BADGES ===== */
.badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 0.78rem;
  font-weight: 600;
  white-space: nowrap;
}

.badge-available { background: #d4edda; color: #155724; }
.badge-borrowed { background: #fff3cd; color: #856404; }
.badge-maintenance { background: #d1ecf1; color: #0c5460; }
.badge-retired { background: #e2e3e5; color: #383d41; }
.badge-active { background: #cce5ff; color: #004085; }
.badge-overdue { background: #f8d7da; color: #721c24; }
.badge-returned { background: #d4edda; color: #155724; }

/* ===== MODAL ===== */
.modal-overlay {
  display: none;
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.5);
  z-index: 200;
  align-items: center;
  justify-content: center;
}

.modal-overlay.show {
  display: flex;
}

.modal {
  background: #fff;
  border-radius: var(--radius);
  padding: 24px;
  width: 90%;
  max-width: 500px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: 0 10px 40px rgba(0,0,0,0.2);
}

.modal-title {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}

.modal-actions {
  display: flex;
  gap: 10px;
  justify-content: flex-end;
  margin-top: 20px;
}

/* ===== TOAST ===== */
.toast {
  position: fixed;
  top: 80px;
  right: 24px;
  padding: 12px 20px;
  border-radius: 8px;
  color: #fff;
  font-weight: 500;
  z-index: 999;
  animation: slideIn 0.3s ease;
  max-width: 400px;
}

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

@keyframes slideIn {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

/* ===== LOGIN PAGE ===== */
.login-page {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
}

.login-box {
  background: #fff;
  border-radius: 16px;
  padding: 40px;
  width: 90%;
  max-width: 400px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.2);
  text-align: center;
}

.login-box h1 {
  font-size: 1.5rem;
  color: var(--primary);
  margin-bottom: 8px;
}

.login-box .subtitle {
  color: var(--text-light);
  font-size: 0.9rem;
  margin-bottom: 28px;
}

.login-box .form-control {
  text-align: center;
}

.login-box .btn {
  width: 100%;
  padding: 12px;
  font-size: 1rem;
  margin-top: 8px;
  justify-content: center;
}

.login-icon {
  font-size: 3rem;
  margin-bottom: 12px;
}

/* ===== QR CODE ===== */
.qr-container {
  text-align: center;
  padding: 20px;
}

.qr-container img {
  max-width: 250px;
  margin: 16px auto;
}

.qr-info-card {
  max-width: 450px;
  margin: 0 auto;
  text-align: left;
}

.qr-info-card .info-row {
  display: flex;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
}

.qr-info-card .info-label {
  font-weight: 600;
  width: 120px;
  flex-shrink: 0;
  color: var(--text-light);
}

.qr-info-card .info-value {
  flex: 1;
}

/* ===== FILTER BAR ===== */
.filter-bar {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  align-items: flex-end;
  margin-bottom: 16px;
}

.filter-bar .form-group {
  margin-bottom: 0;
  min-width: 150px;
}

.filter-bar .form-control {
  padding: 8px 12px;
  font-size: 0.85rem;
}

/* ===== EMPTY STATE ===== */
.empty-state {
  text-align: center;
  padding: 40px 20px;
  color: var(--text-light);
}

.empty-state .empty-icon {
  font-size: 3rem;
  margin-bottom: 12px;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  .navbar { padding: 0 12px; }
  .navbar .nav-links { display: none; }
  .container { padding: 16px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .form-row { grid-template-columns: 1fr; }
  .filter-bar { flex-direction: column; }
  .modal { width: 95%; padding: 16px; }
}

/* ===== HAMBURGER MENU (Mobile) ===== */
.hamburger {
  display: none;
  background: none;
  border: none;
  color: #fff;
  font-size: 1.5rem;
  cursor: pointer;
  padding: 4px;
}

@media (max-width: 768px) {
  .hamburger { display: block; }
  .navbar .nav-links {
    display: none;
    position: absolute;
    top: 60px;
    left: 0;
    right: 0;
    background: var(--primary);
    flex-direction: column;
    padding: 12px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.2);
  }
  .navbar .nav-links.open { display: flex; }
}

/* ===== PRINT ===== */
@media print {
  .navbar, .filter-bar, .btn, .modal-overlay { display: none !important; }
  .container { max-width: 100%; padding: 0; }
  .card { box-shadow: none; border: 1px solid #ddd; }
}

/* ===== CHART BAR ===== */
.chart-bar-container {
  display: flex;
  align-items: flex-end;
  gap: 4px;
  height: 200px;
  padding: 10px 0;
  border-bottom: 2px solid var(--border);
}

.chart-bar {
  flex: 1;
  background: var(--accent);
  border-radius: 4px 4px 0 0;
  min-width: 20px;
  position: relative;
  transition: height 0.3s;
}

.chart-bar:hover {
  background: var(--accent-dark);
}

.chart-bar .bar-label {
  position: absolute;
  bottom: -24px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 0.65rem;
  color: var(--text-light);
  white-space: nowrap;
}

.chart-bar .bar-value {
  position: absolute;
  top: -20px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 0.75rem;
  font-weight: 600;
}