:root {
  --color-primary: #1A3A5C;
  --color-primary-dark: #12293f;
  --color-start-over: #E8610A;
  --color-start-over-dark: #c74f08;
  --color-bg: #f8fafc;
  --color-surface: #ffffff;
  --color-text: #0f172a;
  --color-text-secondary: #64748b;
  --color-border: #e2e8f0;

  --color-fair: #2563eb;
  --color-fair-bg: #eff6ff;
  --color-too-much: #dc2626;
  --color-too-much-bg: #fef2f2;
  --color-great-deal: #16a34a;
  --color-great-deal-bg: #f0fdf4;

  --font-heading: 'Inter', sans-serif;
  --font-body: 'Inter', sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  -webkit-font-smoothing: antialiased;
}

.app {
  max-width: 720px;
  margin: 0 auto;
  padding: 24px 16px 60px;
}

header.app-header {
  text-align: center;
  margin-bottom: 24px;
}

header.app-header h1 {
  font-family: var(--font-heading);
  font-size: 28px;
  font-weight: 700;
  margin: 0 0 4px;
}

header.app-header p {
  color: var(--color-text-secondary);
  margin: 0;
  font-size: 14px;
}

.steps-banner {
  display: flex;
  gap: 12px;
  margin-bottom: 20px;
}

.step-item {
  flex: 1;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 10px;
  padding: 12px;
  text-align: center;
}

.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--color-primary);
  color: white;
  font-size: 12px;
  font-weight: 700;
  margin-bottom: 6px;
}

.step-text {
  display: block;
  font-size: 12px;
  color: var(--color-text-secondary);
  line-height: 1.4;
}

@media (max-width: 480px) {
  .steps-banner { flex-direction: column; }
  .step-item { text-align: left; display: flex; align-items: center; gap: 10px; }
  .step-num { margin-bottom: 0; flex-shrink: 0; }
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: 20px;
  margin-bottom: 16px;
}

.tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
}

.tab-btn {
  flex: 1;
  padding: 10px 12px;
  border-radius: 8px;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text-secondary);
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s ease;
}

.tab-btn.active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: white;
}

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

.vehicle-id-tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 12px;
}

.vid-tab-btn {
  flex: 1;
  padding: 8px 12px;
  border-radius: 8px;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text-secondary);
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s ease;
}

.vid-tab-btn.active {
  background: var(--color-bg);
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.vid-panel { display: none; margin-bottom: 16px; }
.vid-panel.active { display: block; }

.vehicle-row {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr 1fr;
  gap: 8px;
  margin-bottom: 16px;
}

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

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

input:focus, select:focus {
  outline: none;
  border-color: var(--color-primary);
}

select:disabled {
  background: var(--color-bg);
  color: var(--color-text-secondary);
  cursor: not-allowed;
}

.upload-zone {
  border: 2px dashed var(--color-border);
  border-radius: 12px;
  padding: 40px 20px;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.15s ease;
}

.upload-zone:hover, .upload-zone.dragover {
  border-color: var(--color-primary);
}

.upload-zone .upload-icon {
  font-size: 32px;
  margin-bottom: 8px;
}

.upload-zone p {
  margin: 4px 0;
  color: var(--color-text-secondary);
  font-size: 14px;
}

.upload-zone .upload-main {
  color: var(--color-text);
  font-weight: 600;
  font-size: 15px;
}

.line-item-row {
  display: grid;
  grid-template-columns: 1fr 100px 32px;
  gap: 8px;
  margin-bottom: 8px;
  align-items: center;
}

.remove-btn {
  background: none;
  border: none;
  color: var(--color-text-secondary);
  font-size: 18px;
  cursor: pointer;
  padding: 4px;
}

.remove-btn:hover { color: var(--color-too-much); }

.add-item-btn {
  background: none;
  border: 1px dashed var(--color-border);
  border-radius: 8px;
  padding: 10px;
  width: 100%;
  color: var(--color-text-secondary);
  font-family: var(--font-body);
  font-size: 14px;
  cursor: pointer;
  margin-top: 4px;
}

.add-item-btn:hover { border-color: var(--color-primary); color: var(--color-primary); }

.primary-btn {
  width: 100%;
  padding: 14px;
  background: var(--color-primary);
  color: white;
  border: none;
  border-radius: 8px;
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 700;
  cursor: pointer;
  margin-top: 16px;
  transition: background 0.15s ease;
}

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

.secondary-btn {
  background: none;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 10px 16px;
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text);
  cursor: pointer;
}

.start-over-btn {
  background: var(--color-start-over);
  border: none;
  border-radius: 8px;
  padding: 10px 16px;
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 700;
  color: white;
  cursor: pointer;
  transition: background 0.15s ease;
}

.start-over-btn:hover {
  background: var(--color-start-over-dark);
}

/* Loading state */
.loading {
  text-align: center;
  padding: 40px 20px;
}

.spinner {
  width: 32px;
  height: 32px;
  border: 3px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  margin: 0 auto 16px;
  animation: spin 0.8s linear infinite;
}

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

.loading p {
  color: var(--color-text-secondary);
  font-size: 14px;
}

/* Report */
.report-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}

.report-header h2 {
  font-family: var(--font-heading);
  font-size: 20px;
  margin: 0;
}

.result-card {
  border-radius: 10px;
  padding: 16px;
  margin-bottom: 12px;
  border: 1px solid var(--color-border);
}

.result-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 8px;
}

.result-desc {
  font-weight: 600;
  font-size: 15px;
  flex: 1;
}

.verdict-badge {
  font-size: 12px;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 20px;
  white-space: nowrap;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.verdict-badge.fair { background: var(--color-fair-bg); color: var(--color-fair); }
.verdict-badge.too_much { background: var(--color-too-much-bg); color: var(--color-too-much); }
.verdict-badge.great_deal { background: var(--color-great-deal-bg); color: var(--color-great-deal); }
.verdict-badge.estimate_only { background: var(--color-border); color: var(--color-text-secondary); }

.result-prices {
  display: flex;
  gap: 20px;
  font-size: 14px;
  margin-bottom: 6px;
}

.result-prices .label {
  color: var(--color-text-secondary);
  font-size: 12px;
  display: block;
}

.result-prices .value {
  font-weight: 700;
  font-size: 15px;
}

.result-note {
  font-size: 13px;
  color: var(--color-text-secondary);
  margin-top: 4px;
}

.summary-bar {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
}

.summary-pill {
  flex: 1;
  text-align: center;
  padding: 10px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 700;
}

.summary-pill.fair { background: var(--color-fair-bg); color: var(--color-fair); }
.summary-pill.too_much { background: var(--color-too-much-bg); color: var(--color-too-much); }
.summary-pill.great_deal { background: var(--color-great-deal-bg); color: var(--color-great-deal); }
.summary-pill.estimate_only { background: var(--color-border); color: var(--color-text-secondary); }

.error-box {
  background: var(--color-too-much-bg);
  color: var(--color-too-much);
  padding: 12px 16px;
  border-radius: 8px;
  font-size: 14px;
  margin-bottom: 16px;
}

footer.disclaimer {
  text-align: center;
  font-size: 11px;
  color: var(--color-text-secondary);
  margin-top: 32px;
  line-height: 1.5;
}

footer.disclaimer a {
  color: var(--color-text-secondary);
}