/* === Base Reset & Variables === */
:root {
  --primary: #1a56db;
  --primary-light: #e8effc;
  --primary-dark: #1342a8;
  --success: #059669;
  --success-light: #ecfdf5;
  --warning: #d97706;
  --warning-light: #fffbeb;
  --danger: #dc2626;
  --danger-light: #fef2f2;
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-500: #6b7280;
  --gray-700: #374151;
  --gray-900: #111827;
  --shadow: 0 1px 3px rgba(0,0,0,0.1);
  --shadow-md: 0 4px 6px rgba(0,0,0,0.07);
  --shadow-lg: 0 10px 15px rgba(0,0,0,0.1);
  --radius: 8px;
  --radius-lg: 12px;
}

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

body {
  font-family: 'Noto Sans TC', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--gray-50);
  color: var(--gray-900);
  line-height: 1.6;
}

.hidden { display: none !important; }

/* === Navbar === */
.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: white;
  padding: 0 24px;
  height: 60px;
  border-bottom: 1px solid var(--gray-200);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow);
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo {
  width: 36px; height: 36px;
  background: var(--primary);
  color: white;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 14px;
}

.logo-lg {
  width: 64px; height: 64px;
  font-size: 22px;
  border-radius: 14px;
  margin: 0 auto 16px;
}

.brand-text {
  font-weight: 700;
  font-size: 16px;
  color: var(--gray-900);
}

.brand-text small {
  font-weight: 400;
  font-size: 12px;
  color: var(--gray-500);
  display: block;
  line-height: 1;
}

.nav-links {
  display: flex;
  gap: 4px;
}

.nav-link {
  padding: 8px 16px;
  text-decoration: none;
  color: var(--gray-500);
  font-size: 14px;
  font-weight: 500;
  border-radius: 6px;
  transition: all 0.2s;
}

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

.nav-user {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 14px;
  color: var(--gray-700);
}

.hamburger {
  display: none;
  background: none;
  border: none;
  font-size: 24px;
  cursor: pointer;
  color: var(--gray-700);
}

.mobile-menu {
  position: fixed;
  top: 60px;
  left: 0; right: 0;
  background: white;
  border-bottom: 1px solid var(--gray-200);
  box-shadow: var(--shadow-lg);
  z-index: 99;
  padding: 8px 0;
}

.mobile-menu a {
  display: block;
  padding: 12px 24px;
  text-decoration: none;
  color: var(--gray-700);
  font-size: 15px;
}

.mobile-menu a:hover { background: var(--gray-100); }

/* === Auth Page === */
.auth-container {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #1a56db 0%, #3b82f6 100%);
  padding: 20px;
}

.auth-card {
  background: white;
  border-radius: var(--radius-lg);
  padding: 40px;
  width: 100%;
  max-width: 420px;
  box-shadow: var(--shadow-lg);
}

.auth-header {
  text-align: center;
  margin-bottom: 32px;
}

.auth-header h1 {
  font-size: 24px;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 4px;
}

.auth-header p {
  color: var(--gray-500);
  font-size: 14px;
}

.auth-switch {
  text-align: center;
  margin-top: 16px;
  font-size: 14px;
  color: var(--gray-500);
}

.auth-switch a {
  color: var(--primary);
  text-decoration: none;
  font-weight: 500;
}

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

.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: var(--gray-700);
  margin-bottom: 4px;
}

.required { color: var(--danger); }

.form-control {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--gray-300);
  border-radius: 6px;
  font-size: 14px;
  font-family: inherit;
  transition: border-color 0.2s;
  background: white;
}

.form-control:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(26, 86, 219, 0.1);
}

textarea.form-control { resize: vertical; }

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

.form-row .form-group { flex: 1; }
.form-row .form-group.flex-2 { flex: 2; }

.form-card {
  background: white;
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow);
}

.form-actions {
  display: flex;
  gap: 12px;
  margin-top: 24px;
}

/* === Buttons === */
.btn {
  padding: 10px 20px;
  border: none;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 500;
  font-family: inherit;
  cursor: pointer;
  transition: all 0.2s;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

.btn-primary { background: var(--primary); color: white; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-outline { background: white; color: var(--gray-700); border: 1px solid var(--gray-300); }
.btn-outline:hover { background: var(--gray-100); }
.btn-success { background: var(--success); color: white; }
.btn-block { width: 100%; }
.btn-sm { padding: 6px 12px; font-size: 13px; }

/* === Container === */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 24px;
}

.page { min-height: calc(100vh - 60px); }

.page-title {
  font-size: 22px;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 24px;
}

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

.page-header .page-title { margin-bottom: 0; }

.subtitle {
  color: var(--gray-500);
  font-size: 15px;
  margin-bottom: 24px;
  margin-top: -16px;
}

/* === Stats Grid === */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 32px;
}

.stat-card {
  background: white;
  border-radius: var(--radius);
  padding: 20px;
  display: flex;
  align-items: center;
  gap: 16px;
  box-shadow: var(--shadow);
}

.stat-icon {
  width: 48px; height: 48px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
}

.stat-icon.blue { background: var(--primary-light); }
.stat-icon.green { background: var(--success-light); }
.stat-icon.orange { background: var(--warning-light); }
.stat-icon.red { background: var(--danger-light); }

.stat-value {
  font-size: 28px;
  font-weight: 700;
  line-height: 1;
}

.stat-label {
  font-size: 13px;
  color: var(--gray-500);
  margin-top: 2px;
}

/* === Section === */
.section {
  background: white;
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
  margin-bottom: 24px;
}

.section h3 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--gray-900);
}

/* === Data Table === */
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

.data-table th {
  text-align: left;
  padding: 10px 12px;
  font-weight: 600;
  color: var(--gray-500);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  border-bottom: 2px solid var(--gray-200);
  white-space: nowrap;
}

.data-table td {
  padding: 12px;
  border-bottom: 1px solid var(--gray-100);
  color: var(--gray-700);
}

.data-table tr:hover td { background: var(--gray-50); }

.data-table a { color: var(--primary); text-decoration: none; font-weight: 500; }
.data-table a:hover { text-decoration: underline; }

/* === Badges === */
.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 12px;
  font-size: 12px;
  font-weight: 500;
}

.badge-blue { background: var(--primary-light); color: var(--primary); }
.badge-green { background: var(--success-light); color: var(--success); }
.badge-orange { background: var(--warning-light); color: var(--warning); }
.badge-red { background: var(--danger-light); color: var(--danger); }
.badge-gray { background: var(--gray-100); color: var(--gray-500); }

/* === Filter Bar === */
.filter-bar {
  display: flex;
  gap: 12px;
  margin-bottom: 20px;
}

.filter-bar .form-control { max-width: 300px; }

/* === Fee List === */
.fee-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 0;
  border-bottom: 1px solid var(--gray-100);
}

.fee-item:last-child { border-bottom: none; }

.fee-info h4 {
  font-size: 14px;
  font-weight: 500;
  color: var(--gray-900);
}

.fee-info p {
  font-size: 13px;
  color: var(--gray-500);
}

.fee-date {
  text-align: right;
}

.fee-date .date {
  font-weight: 600;
  font-size: 14px;
}

.fee-date .amount {
  font-size: 13px;
  color: var(--gray-500);
}

/* === Case Detail === */
.detail-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin: 24px 0;
}

.detail-title {
  font-size: 20px;
  font-weight: 700;
}

.detail-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 24px;
}

.detail-field {
  background: var(--gray-50);
  padding: 12px;
  border-radius: 6px;
}

.detail-field label {
  display: block;
  font-size: 12px;
  color: var(--gray-500);
  margin-bottom: 2px;
}

.detail-field .value {
  font-size: 14px;
  font-weight: 500;
  color: var(--gray-900);
}

/* === Timeline === */
.timeline {
  position: relative;
  padding-left: 24px;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 8px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--gray-200);
}

.timeline-item {
  position: relative;
  padding-bottom: 20px;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -20px;
  top: 6px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--gray-300);
  border: 2px solid white;
}

.timeline-item.paid::before { background: var(--success); }
.timeline-item.upcoming::before { background: var(--warning); }
.timeline-item.overdue::before { background: var(--danger); }

.timeline-item .tl-date {
  font-size: 12px;
  color: var(--gray-500);
}

.timeline-item .tl-title {
  font-weight: 500;
  font-size: 14px;
}

.timeline-item .tl-amount {
  font-size: 13px;
  color: var(--gray-500);
}

/* === Services === */
.service-category {
  margin-bottom: 32px;
}

.service-category h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--primary-light);
}

.service-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
}

.service-card {
  background: white;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 20px;
  transition: all 0.2s;
}

.service-card:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
}

.service-card h4 {
  font-size: 15px;
  font-weight: 600;
  color: var(--gray-900);
  margin-bottom: 6px;
}

.service-card p {
  font-size: 13px;
  color: var(--gray-500);
  margin-bottom: 8px;
}

.service-price {
  font-size: 13px;
  font-weight: 600;
  color: var(--primary);
}

/* === Contact Box === */
.contact-box {
  background: var(--primary-light);
  border: 1px solid rgba(26, 86, 219, 0.2);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin-top: 32px;
}

.contact-box h3 {
  color: var(--primary-dark);
  font-size: 16px;
  margin-bottom: 8px;
}

.contact-box p {
  font-size: 14px;
  color: var(--gray-700);
  margin-bottom: 4px;
}

.contact-box a { color: var(--primary); }

/* === Footer === */
.footer {
  text-align: center;
  padding: 24px;
  color: var(--gray-500);
  font-size: 13px;
  border-top: 1px solid var(--gray-200);
  background: white;
}

/* === Error === */
.error-msg {
  background: var(--danger-light);
  color: var(--danger);
  padding: 10px 12px;
  border-radius: 6px;
  font-size: 14px;
  margin-bottom: 12px;
}

.empty-msg {
  text-align: center;
  color: var(--gray-500);
  padding: 32px;
  font-size: 14px;
}

/* === Responsive === */
@media (max-width: 768px) {
  .nav-links, .nav-user { display: none; }
  .hamburger { display: block; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .detail-grid { grid-template-columns: 1fr; }
  .form-row { flex-direction: column; gap: 0; }
  .filter-bar { flex-direction: column; }
  .filter-bar .form-control { max-width: 100%; }
  .page-header { flex-direction: column; gap: 12px; align-items: flex-start; }
  .auth-card { padding: 24px; }
  .container { padding: 16px; }
  .data-table { font-size: 13px; }
  .data-table th, .data-table td { padding: 8px 6px; }
  .service-grid { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .stats-grid { grid-template-columns: 1fr; }
}

/* === Loading === */
.spinner {
  display: inline-block;
  width: 20px; height: 20px;
  border: 2px solid var(--gray-300);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

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

/* AI Upload Zone */
.ai-upload-card{background:#f0f7ff;border:2px solid #b3d4fc;border-radius:12px;padding:24px;margin-bottom:20px}
.ai-upload-header{display:flex;gap:12px;align-items:flex-start;margin-bottom:16px}
.ai-icon{font-size:32px}
.ai-upload-header h3{margin:0;color:#1565c0;font-size:16px}
.ai-hint{color:#555;font-size:13px;margin:4px 0 0}
.ai-hint-small{color:#888;font-size:12px;margin:2px 0 0;font-style:italic}
.upload-zone{border:3px dashed #1976d2;border-radius:12px;padding:40px 32px;text-align:center;cursor:pointer;transition:all .2s;background:#f5faff;min-height:140px;display:flex;flex-direction:column;align-items:center;justify-content:center}
.upload-zone:hover,.upload-zone.dragover{border-color:#0d47a1;background:#e3f2fd;box-shadow:0 0 12px rgba(25,118,210,.2)}
.upload-icon{font-size:56px;display:block;margin-bottom:12px}
.upload-formats{font-size:12px;color:#777;margin-top:8px;background:#e8f0fe;padding:4px 12px;border-radius:12px;display:inline-block}
.upload-preview{display:flex;align-items:center;gap:16px}
.upload-preview img{max-height:120px;max-width:200px;border-radius:6px;border:1px solid #ddd}
.preview-info{display:flex;flex-direction:column;gap:8px}
.btn-remove{background:none;border:1px solid #f44336;color:#f44336;padding:4px 10px;border-radius:4px;cursor:pointer;font-size:12px}
.upload-actions{margin-top:12px;text-align:right}
.btn-ai{background:linear-gradient(135deg,#1565c0,#0d47a1);color:#fff;border:none;padding:10px 24px;border-radius:6px;cursor:pointer;font-size:14px;font-weight:600}
.btn-ai:disabled{opacity:.5;cursor:not-allowed}
.ai-result{background:#e8f5e9;border:1px solid #81c784;border-radius:8px;padding:16px;margin-top:12px}
.ai-result-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:12px;font-weight:600;color:#2e7d32}
.confidence-badge{font-size:12px;padding:2px 8px;border-radius:10px}
.confidence-badge.high{background:#c8e6c9;color:#2e7d32}
.confidence-badge.medium{background:#fff9c4;color:#f57f17}
.confidence-badge.low{background:#ffcdd2;color:#c62828}
.ai-result-body .field{display:flex;gap:8px;padding:4px 0;border-bottom:1px solid #c8e6c9}
.ai-result-body .field-label{color:#666;min-width:100px;font-weight:500;font-size:13px}
.ai-result-body .field-value{color:#333;font-size:13px}

/* === Modal === */
.modal-overlay{position:fixed;inset:0;background:rgba(0,0,0,.45);z-index:1000;display:flex;align-items:center;justify-content:center;padding:16px}
.modal-box{background:#fff;border-radius:12px;width:100%;max-width:540px;max-height:90vh;overflow-y:auto;box-shadow:0 8px 32px rgba(0,0,0,.2)}
.modal-header{display:flex;justify-content:space-between;align-items:center;padding:20px 24px 0}
.modal-header h3{margin:0;font-size:18px}
.modal-close{background:none;border:none;font-size:20px;cursor:pointer;color:var(--gray-500);line-height:1}
.modal-body{padding:20px 24px}
.modal-footer{display:flex;justify-content:flex-end;gap:10px;padding:0 24px 20px}

/* === Danger Button === */
.btn-danger{background:#f44336;color:#fff;border:none}
.btn-danger:hover{background:#d32f2f}

/* === Success Msg === */
.success-msg{background:#e8f5e9;color:#2e7d32;border:1px solid #81c784;border-radius:6px;padding:10px 14px;font-size:14px}

/* === Profile value text === */
.value-text{padding:8px 0;color:var(--gray-800);font-size:15px}