:root {
  --bg: #f4f6f9;
  --panel-bg: #ffffff;
  --border: #e0e4ea;
  --text: #1c2430;
  --text-muted: #667085;
  --primary: #2454ff;
  --primary-dark: #163bc7;
  --accent: #f5a623;
  --danger: #d92d20;
  --success: #1a9e5c;
  --radius: 12px;
  --shadow: 0 1px 2px rgba(16, 24, 40, 0.06), 0 1px 3px rgba(16, 24, 40, 0.08);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 32px;
  background: var(--panel-bg);
  border-bottom: 1px solid var(--border);
}

.brand { display: flex; align-items: center; gap: 10px; }
.brand-mark {
  display: inline-flex; align-items: center; justify-content: center;
  width: 32px; height: 32px; border-radius: 8px;
  background: var(--primary); color: #fff; font-weight: 700; font-size: 13px;
}
.brand-name { font-weight: 700; font-size: 16px; }
.brand-sub { color: var(--text-muted); font-size: 14px; }

.tabs { display: flex; gap: 4px; }
.tab-btn {
  padding: 8px 16px; border: none; background: transparent; border-radius: 8px;
  font-size: 14px; font-weight: 600; color: var(--text-muted); cursor: pointer;
}
.tab-btn.active { background: rgba(36, 84, 255, 0.1); color: var(--primary); }
.tab-btn:hover { background: rgba(16, 24, 40, 0.05); }

.layout { max-width: 1200px; margin: 0 auto; padding: 24px 32px 64px; }

.tab-panel { display: none; }
.tab-panel.active { display: block; }

.mode-banner {
  border-radius: 10px;
  padding: 10px 16px;
  font-size: 13px;
  margin-bottom: 16px;
  border: 1px solid transparent;
}
.mode-live { background: rgba(26,158,92,0.1); border-color: rgba(26,158,92,0.3); color: #106b3e; }
.mode-demo { background: rgba(245,166,35,0.1); border-color: rgba(245,166,35,0.3); color: #a15c00; }

.grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.panel {
  background: var(--panel-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.panel-submit { grid-column: 1 / -1; }
.panel-results { margin-top: 20px; }
.panel-history { margin-top: 0; }

.panel-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
}
.panel-header h2 { margin: 0; font-size: 16px; }
.panel-hint { margin: 4px 0 0; font-size: 13px; color: var(--text-muted); }

.panel-body { padding: 20px; }

label { display: block; font-size: 13px; font-weight: 600; margin-bottom: 6px; color: var(--text); }
input[type="text"], input[type="email"], input:not([type]) {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
  margin-bottom: 12px;
}
input:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(36,84,255,0.12); }

.input-row { display: flex; gap: 8px; }
.input-row input { flex: 1; margin-bottom: 0; }

.field-error { color: var(--danger); font-size: 12px; min-height: 16px; margin: 4px 0 0; }

.btn {
  padding: 10px 18px;
  border-radius: 8px;
  border: none;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-secondary { background: rgba(16,24,40,0.06); color: var(--text); }
.btn-secondary:hover { background: rgba(16,24,40,0.1); }
.btn:disabled { opacity: 0.6; cursor: not-allowed; }

.vehicle-summary {
  margin-top: 8px;
  border-top: 1px dashed var(--border);
  padding-top: 12px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px 16px;
}
.vs-row { display: flex; justify-content: space-between; font-size: 13px; }
.vs-row span { color: var(--text-muted); }

.options-list { display: flex; flex-direction: column; gap: 10px; }
.option-item { display: flex; align-items: center; gap: 10px; font-weight: 500; font-size: 14px; cursor: pointer; }
.option-checkbox { width: 16px; height: 16px; }

.status-line { margin-top: 14px; display: flex; align-items: center; gap: 10px; font-size: 13px; color: var(--text-muted); }
.spinner {
  width: 14px; height: 14px; border-radius: 50%;
  border: 2px solid rgba(36,84,255,0.25); border-top-color: var(--primary);
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.badge { font-size: 11px; font-weight: 700; padding: 3px 8px; border-radius: 999px; text-transform: uppercase; letter-spacing: 0.03em; }
.badge-demo { background: rgba(245,166,35,0.15); color: #a15c00; }
.badge-live { background: rgba(26,158,92,0.15); color: var(--success); }

.pdf-panel {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 20px;
  background: rgba(26,158,92,0.06);
}
.pdf-panel-icon { font-size: 32px; }
.pdf-panel-info { flex: 1; }
.pdf-panel-info h3 { margin: 0 0 4px; font-size: 15px; }
.pdf-panel-info p { margin: 0; font-size: 13px; color: var(--text-muted); }

.report-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 16px; }
.report-card { border: 1px solid var(--border); border-radius: 10px; padding: 14px; }
.report-card h3 { margin: 0 0 10px; font-size: 14px; }
.report-card .metric { font-size: 24px; font-weight: 700; }
.report-card ul { margin: 8px 0 0; padding-left: 18px; font-size: 13px; color: var(--text); }
.report-card li { margin-bottom: 4px; }
.tag-clean { color: var(--success); font-weight: 700; }
.tag-flag { color: var(--danger); font-weight: 700; }

.history-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.history-table th, .history-table td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--border); }
.history-table th { color: var(--text-muted); font-weight: 600; }
.empty-row { text-align: center; color: var(--text-muted); padding: 24px 0; }

.disclaimer {
  max-width: 1200px;
  margin: 0 auto 40px;
  padding: 0 32px;
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.5;
}

@media (max-width: 860px) {
  .grid { grid-template-columns: 1fr; }
  .topbar { flex-direction: column; align-items: flex-start; gap: 12px; }
}