/* ═══════════════════════════════════════════
   CalTrack Demo — Calibration Equipment Management
   ═══════════════════════════════════════════ */

/* ─── CSS Custom Properties ─────────────── */
:root {
  --bg-primary: #f8f9fa;
  --bg-secondary: #ffffff;
  --bg-tertiary: #e9ecef;
  --text-primary: #1a1a2e;
  --text-secondary: #495057;
  --text-muted: #868e96;
  --accent: #0066cc;
  --accent-hover: #0052a3;
  --accent-light: rgba(0, 102, 204, 0.1);
  --border: #dee2e6;
  --border-light: #e9ecef;
  --shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
  --shadow-hover: 0 4px 16px rgba(0, 0, 0, 0.15);
  --radius: 8px;
  --radius-lg: 12px;
  --status-valid: #2ecc71;
  --status-valid-bg: rgba(46, 204, 113, 0.1);
  --status-due-soon: #f39c12;
  --status-due-soon-bg: rgba(243, 156, 18, 0.1);
  --status-expired: #e74c3c;
  --status-expired-bg: rgba(231, 76, 60, 0.1);
  --nav-height: 64px;
  --transition: 0.2s ease;
}

body.dark-theme,
html.dark-theme-loading body {
  --bg-primary: #0f1117;
  --bg-secondary: #1a1d28;
  --bg-tertiary: #252836;
  --text-primary: #e4e6eb;
  --text-secondary: #b0b3b8;
  --text-muted: #8a8d91;
  --accent: #4d9fff;
  --accent-hover: #6db3ff;
  --accent-light: rgba(77, 159, 255, 0.12);
  --border: #2f3340;
  --border-light: #252836;
  --shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.4);
  --shadow-hover: 0 4px 16px rgba(0, 0, 0, 0.5);
  --status-valid-bg: rgba(46, 204, 113, 0.15);
  --status-due-soon-bg: rgba(243, 156, 18, 0.15);
  --status-expired-bg: rgba(231, 76, 60, 0.15);
}

html.dark-theme-loading {
  background: #0f1117;
}

/* ─── Reset & Base ──────────────────────── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  transition: background var(--transition), color var(--transition);
}

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

a:hover {
  color: var(--accent-hover);
}

/* ─── Container ─────────────────────────── */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  width: 100%;
}

/* ─── Navbar ────────────────────────────── */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow);
  height: var(--nav-height);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.2rem;
  color: var(--text-primary);
}

.nav-brand i {
  color: var(--accent);
  font-size: 1.4rem;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-link {
  padding: 8px 16px;
  border-radius: var(--radius);
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  transition: all var(--transition);
}

.nav-link:hover {
  color: var(--accent);
  background: var(--accent-light);
}

.nav-link.active {
  color: var(--accent);
  background: var(--accent-light);
}

.nav-link i {
  margin-right: 6px;
}

.theme-toggle {
  background: none;
  border: 1px solid var(--border);
  color: var(--text-secondary);
  width: 40px;
  height: 40px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  transition: all var(--transition);
}

.theme-toggle:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1.3rem;
  cursor: pointer;
  padding: 8px;
}

.mobile-menu {
  display: none;
  flex-direction: column;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  padding: 8px 24px 16px;
}

.mobile-menu.open {
  display: flex;
}

/* ─── Hero ──────────────────────────────── */
.hero {
  background: linear-gradient(135deg, var(--accent) 0%, #0044aa 100%);
  color: #fff;
  padding: 60px 0 50px;
  text-align: center;
}

body.dark-theme .hero {
  background: linear-gradient(135deg, #1a3a6b 0%, #0d2240 100%);
}

.hero h1 {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.hero-icon {
  margin-right: 8px;
}

.hero-tagline {
  font-size: 1.15rem;
  opacity: 0.9;
  margin-bottom: 32px;
}

.search-container {
  max-width: 600px;
  margin: 0 auto;
}

.search-bar {
  display: flex;
  align-items: center;
  background: var(--bg-secondary);
  border-radius: 50px;
  padding: 4px 20px;
  box-shadow: var(--shadow-lg);
}

.search-icon {
  color: var(--text-muted);
  margin-right: 12px;
  font-size: 1rem;
}

.search-bar input {
  flex: 1;
  border: none;
  outline: none;
  background: transparent;
  font-family: inherit;
  font-size: 1rem;
  color: var(--text-primary);
  padding: 12px 0;
}

.search-bar input::placeholder {
  color: var(--text-muted);
}

.search-clear {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 4px 8px;
  font-size: 1rem;
}

.search-clear:hover {
  color: var(--text-primary);
}

/* ─── Section Header ────────────────────── */
.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin: 32px 0 24px;
}

.section-header h2 {
  font-size: 1.5rem;
  font-weight: 600;
}

.equipment-count {
  font-size: 0.9rem;
  color: var(--text-muted);
  background: var(--bg-tertiary);
  padding: 4px 12px;
  border-radius: 20px;
}

/* ─── Loading & Empty States ────────────── */
.loading {
  text-align: center;
  padding: 60px 0;
  color: var(--text-muted);
}

.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin: 0 auto 16px;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.empty-state {
  text-align: center;
  padding: 60px 0;
  color: var(--text-muted);
}

.empty-state i {
  font-size: 3rem;
  margin-bottom: 16px;
  opacity: 0.5;
}

.empty-state h3 {
  font-size: 1.3rem;
  margin-bottom: 8px;
  color: var(--text-secondary);
}

/* ─── Equipment Grid ────────────────────── */
.equipment-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 20px;
  padding-bottom: 40px;
}

.equipment-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  transition: all var(--transition);
  cursor: pointer;
  position: relative;
}

.equipment-card:hover {
  box-shadow: var(--shadow-hover);
  border-color: var(--accent);
  transform: translateY(-2px);
}

.equipment-card .card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 12px;
}

.equipment-card .card-id {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent);
  background: var(--accent-light);
  padding: 2px 10px;
  border-radius: 4px;
  letter-spacing: 0.5px;
}

.equipment-card .card-name {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.equipment-card .card-details {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 0.88rem;
  color: var(--text-secondary);
}

.equipment-card .card-details .detail-row {
  display: flex;
  justify-content: space-between;
}

.equipment-card .card-details .detail-row .label {
  color: var(--text-muted);
}

.equipment-card .card-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--border-light);
}

.equipment-card .view-link {
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--accent);
}

.equipment-card .view-link i {
  margin-left: 4px;
  transition: transform var(--transition);
}

.equipment-card:hover .view-link i {
  transform: translateX(4px);
}

/* ─── Status Badge ──────────────────────── */
.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.3px;
  text-transform: uppercase;
}

.status-badge.valid {
  color: var(--status-valid);
  background: var(--status-valid-bg);
}

.status-badge.due-soon {
  color: var(--status-due-soon);
  background: var(--status-due-soon-bg);
}

.status-badge.expired {
  color: var(--status-expired);
  background: var(--status-expired-bg);
}

.status-badge i {
  font-size: 0.7rem;
}

.status-badge-lg {
  font-size: 0.95rem;
  padding: 6px 18px;
}

/* ─── Detail Page ───────────────────────── */
.detail-page {
  padding-top: 32px;
  padding-bottom: 60px;
  flex: 1;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 24px;
  transition: color var(--transition);
}

.back-link:hover {
  color: var(--accent);
}

.detail-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 32px;
  gap: 16px;
  flex-wrap: wrap;
}

.detail-header h1 {
  font-size: 1.8rem;
  font-weight: 700;
}

.equipment-id-label {
  font-size: 0.95rem;
  color: var(--accent);
  font-weight: 600;
  margin-top: 4px;
}

.detail-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow);
}

.detail-card h2 {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 24px;
  color: var(--text-primary);
}

.detail-card h2 i {
  color: var(--accent);
  margin-right: 8px;
}

.detail-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}

.detail-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.detail-item label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.detail-item span {
  font-size: 1.05rem;
  color: var(--text-primary);
  font-weight: 500;
}

.certificate-section {
  margin-top: 32px;
  text-align: center;
}

/* ─── Buttons ───────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border: none;
  border-radius: var(--radius);
  font-family: inherit;
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
}

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

.btn-primary:hover {
  background: var(--accent-hover);
}

.btn-secondary {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.btn-danger {
  background: var(--status-expired);
  color: #fff;
}

.btn-danger:hover {
  background: #c0392b;
}

.btn-sm {
  padding: 6px 12px;
  font-size: 0.82rem;
}

.btn-lg {
  padding: 14px 32px;
  font-size: 1rem;
}

.btn-block {
  width: 100%;
  justify-content: center;
}

.btn-icon {
  padding: 8px;
  width: 36px;
  height: 36px;
  justify-content: center;
}

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

/* ─── Modal ─────────────────────────────── */
.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
  justify-content: center;
  align-items: center;
  padding: 24px;
}

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

.modal {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  width: 100%;
  max-width: 480px;
  max-height: 90vh;
  overflow-y: auto;
}

.modal-lg {
  max-width: 640px;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 24px;
  border-bottom: 1px solid var(--border);
}

.modal-header h3 {
  font-size: 1.1rem;
  font-weight: 600;
}

.modal-header h3 i {
  margin-right: 8px;
  color: var(--accent);
}

.modal-close {
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--text-muted);
  cursor: pointer;
  padding: 0 4px;
  line-height: 1;
}

.modal-close:hover {
  color: var(--text-primary);
}

.modal-body {
  padding: 24px;
}

.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 12px;
  margin-top: 24px;
}

/* ─── Forms ─────────────────────────────── */
.form-group {
  margin-bottom: 16px;
  flex: 1;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.form-group input,
.form-group select {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-family: inherit;
  font-size: 0.95rem;
  color: var(--text-primary);
  background: var(--bg-primary);
  transition: border-color var(--transition);
}

.form-group input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-light);
}

.form-group input[type="file"] {
  padding: 8px;
}

.form-row {
  display: flex;
  gap: 16px;
}

.form-error {
  color: var(--status-expired);
  font-size: 0.85rem;
  margin-top: 8px;
}

.password-input-wrap {
  position: relative;
}

.password-input-wrap input {
  padding-right: 44px;
}

.password-toggle {
  position: absolute;
  right: 8px;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 4px 8px;
}

.password-toggle:hover {
  color: var(--text-primary);
}

/* ─── Login Gate ────────────────────────── */
.login-gate {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: calc(100vh - var(--nav-height) - 80px);
  padding: 40px 0;
}

.login-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: var(--shadow-lg);
  width: 100%;
  max-width: 400px;
  text-align: center;
}

.login-icon {
  font-size: 3rem;
  color: var(--accent);
  margin-bottom: 16px;
}

.login-card h2 {
  font-size: 1.5rem;
  margin-bottom: 8px;
}

.login-card p {
  color: var(--text-muted);
  margin-bottom: 24px;
}

.login-card .form-group {
  text-align: left;
}

/* ─── Admin Panel ───────────────────────── */
.admin-page {
  padding-top: 32px;
  padding-bottom: 60px;
  flex: 1;
}

.admin-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
  flex-wrap: wrap;
  gap: 16px;
}

.admin-header h1 {
  font-size: 1.5rem;
  font-weight: 600;
}

.admin-header h1 i {
  color: var(--accent);
  margin-right: 8px;
}

.admin-actions {
  display: flex;
  gap: 12px;
}

/* ─── Admin Filters ────────────────────── */
.admin-filters {
  display: flex;
  align-items: flex-end;
  gap: 16px;
  margin-bottom: 20px;
  flex-wrap: wrap;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 16px 20px;
}

.admin-filters .filter-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
  flex: 1;
  min-width: 160px;
}

.admin-filters .filter-group label {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.admin-filters .filter-group label i {
  color: var(--accent);
  margin-right: 4px;
}

.admin-filters .filter-group input,
.admin-filters .filter-group select {
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-primary);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 0.875rem;
}

.admin-filters .filter-group input:focus,
.admin-filters .filter-group select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.1);
}

.admin-filters .filter-actions {
  display: flex;
  gap: 8px;
  align-self: flex-end;
}

.admin-filters .filter-actions .btn {
  white-space: nowrap;
}

/* ─── Flatpickr Theme Override ──────────── */
.dark-theme .flatpickr-calendar {
  background: var(--bg-secondary);
  border-color: var(--border);
  box-shadow: 0 4px 20px rgba(0,0,0,0.4);
}
.dark-theme .flatpickr-months .flatpickr-month,
.dark-theme .flatpickr-current-month .flatpickr-monthDropdown-months,
.dark-theme .flatpickr-weekdays,
.dark-theme span.flatpickr-weekday {
  background: var(--bg-secondary);
  color: var(--text-primary);
}
.dark-theme .flatpickr-day {
  color: var(--text-primary);
}
.dark-theme .flatpickr-day:hover {
  background: var(--border);
  border-color: var(--border);
}
.dark-theme .flatpickr-day.selected {
  background: var(--accent);
  border-color: var(--accent);
}
.dark-theme .flatpickr-months .flatpickr-prev-month svg,
.dark-theme .flatpickr-months .flatpickr-next-month svg {
  fill: var(--text-primary);
}

/* ─── Data Table ────────────────────────── */
.table-container {
  overflow-x: auto;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}

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

.data-table th {
  background: var(--bg-tertiary);
  padding: 12px 16px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  text-align: left;
  white-space: nowrap;
}

.data-table td {
  padding: 14px 16px;
  border-top: 1px solid var(--border-light);
  font-size: 0.9rem;
  color: var(--text-primary);
}

.data-table tbody tr:hover {
  background: var(--accent-light);
}

.data-table .actions-cell {
  display: flex;
  gap: 8px;
  white-space: nowrap;
}

/* ─── QR Modal ──────────────────────────── */
.qr-modal-body {
  text-align: center;
}

.qr-container {
  display: inline-block;
  padding: 16px;
  background: #fff;
  border-radius: var(--radius);
  margin: 16px 0;
}

.qr-equip-id {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--accent);
}

.qr-equip-detail {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin: 2px 0;
}

.qr-url {
  font-size: 0.78rem;
  color: var(--text-muted);
  word-break: break-all;
}

/* ─── Footer ────────────────────────────── */
.footer {
  margin-top: auto;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  padding: 24px 0;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* ─── Utility ───────────────────────────── */
.text-muted {
  color: var(--text-muted);
  font-size: 0.88rem;
}

/* ─── Print Styles ──────────────────────── */
@media print {
  body * { visibility: hidden; }
  .qr-print-area, .qr-print-area * { visibility: visible; }
  .qr-print-area {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
  }
}

/* ─── Responsive ────────────────────────── */
@media (max-width: 768px) {
  .nav-links { display: none; }
  .mobile-menu-btn { display: block; }

  .hero h1 { font-size: 1.8rem; }
  .hero-tagline { font-size: 1rem; }

  .equipment-grid {
    grid-template-columns: 1fr;
  }

  .detail-grid {
    grid-template-columns: 1fr;
  }

  .detail-header {
    flex-direction: column;
  }

  .detail-header h1 { font-size: 1.4rem; }

  .admin-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .form-row {
    flex-direction: column;
    gap: 0;
  }

  .data-table th,
  .data-table td {
    padding: 10px 12px;
    font-size: 0.82rem;
  }

  .modal {
    margin: 16px;
  }

  .login-card {
    padding: 24px;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }

  .hero {
    padding: 40px 0 36px;
  }

  .hero h1 { font-size: 1.5rem; }

  .equipment-card {
    padding: 18px;
  }

  .detail-card {
    padding: 20px;
  }
}