:root {
  --bg: #0f1419;
  --surface: #1a222d;
  --surface-2: #232d3b;
  --border: #2f3b4d;
  --text: #e8edf4;
  --muted: #93a1b5;
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --success: #22c55e;
  --error: #ef4444;
  --radius: 10px;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
  background: linear-gradient(160deg, #0b1016 0%, #121a24 45%, #0f1419 100%);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.5;
}

.container {
  width: min(1100px, 92vw);
  margin: 0 auto;
}

.site-header {
  padding: 2.5rem 0 1.5rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 1.5rem;
}

.header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.site-header h1 {
  margin: 0;
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.subtitle {
  margin: 0.35rem 0 0;
  color: var(--muted);
}

.tabs {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
  flex-wrap: wrap;
}

.tab {
  background: var(--surface);
  color: var(--muted);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.55rem 1.1rem;
  cursor: pointer;
  font: inherit;
  transition: 0.15s ease;
}

.tab:hover {
  color: var(--text);
  border-color: #456;
}

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

.panel {
  display: none;
}

.panel.active {
  display: block;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  margin-bottom: 1.25rem;
  box-shadow: var(--shadow);
}

.card h2 {
  margin: 0 0 0.75rem;
  font-size: 1.2rem;
}

.help-text,
.optional {
  color: var(--muted);
  font-size: 0.92rem;
}

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

.full-width {
  grid-column: 1 / -1;
}

label {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  font-size: 0.92rem;
  font-weight: 600;
}

input,
select {
  width: 100%;
  padding: 0.65rem 0.75rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--surface-2);
  color: var(--text);
  font: inherit;
}

input:focus,
select:focus {
  outline: 2px solid rgba(59, 130, 246, 0.45);
  border-color: var(--accent);
}

input:disabled,
select:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.form-actions {
  grid-column: 1 / -1;
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-top: 0.25rem;
}

.btn {
  border: none;
  border-radius: 8px;
  padding: 0.65rem 1rem;
  font: inherit;
  cursor: pointer;
  transition: 0.15s ease;
}

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

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

.btn.secondary {
  background: var(--surface-2);
  color: var(--text);
  border: 1px solid var(--border);
}

.btn.secondary:hover {
  border-color: #456;
}

.btn.icon {
  width: 2.25rem;
  height: 2.25rem;
  padding: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  line-height: 1;
}

.fieldset {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem;
  margin: 1.25rem 0 0;
}

.fieldset legend {
  padding: 0 0.35rem;
  font-weight: 600;
}

.dynamic-list {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  margin-bottom: 0.75rem;
}

.dynamic-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.5rem;
}

.checkbox-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 0.5rem;
  max-height: 260px;
  overflow: auto;
  padding-right: 0.25rem;
}

.checkbox-item {
  display: flex;
  align-items: flex-start;
  gap: 0.55rem;
  padding: 0.55rem 0.65rem;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 400;
}

.checkbox-item input {
  width: auto;
  margin-top: 0.2rem;
}

.form-message {
  min-height: 1.25rem;
  margin: 0.75rem 0 0;
  font-size: 0.92rem;
}

.form-message.success {
  color: var(--success);
}

.form-message.error {
  color: var(--error);
}

.data-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.list-item {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.9rem 1rem;
}

.list-item-title {
  font-weight: 600;
  margin-bottom: 0.35rem;
}

.list-item-meta {
  color: var(--muted);
  font-size: 0.9rem;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 0.5rem;
}

.tag {
  background: rgba(59, 130, 246, 0.15);
  color: #93c5fd;
  border: 1px solid rgba(59, 130, 246, 0.35);
  border-radius: 999px;
  padding: 0.15rem 0.6rem;
  font-size: 0.82rem;
}

.hidden {
  display: none !important;
}

.vehicle-summary {
  color: var(--muted);
  margin-bottom: 1rem;
}

.category-group {
  margin-bottom: 1rem;
}

.category-group h3 {
  margin: 0 0 0.5rem;
  font-size: 1rem;
  color: #93c5fd;
}

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

.result-table th,
.result-table td {
  text-align: left;
  padding: 0.55rem 0.65rem;
  border-bottom: 1px solid var(--border);
}

.result-table th {
  color: var(--muted);
  font-size: 0.85rem;
  font-weight: 600;
}

.empty-state {
  color: var(--muted);
  font-style: italic;
}

@media (max-width: 640px) {
  .card {
    padding: 1rem;
  }
}