:root {
  color-scheme: light;
  --bg: #f7f8fb;
  --surface: #ffffff;
  --surface-soft: #f1f4f8;
  --text: #111318;
  --muted: #69717d;
  --line: #dce2ea;
  --accent: #0f766e;
  --accent-soft: #e2f3f0;
  --accent-ink: #074c45;
  --price-strong: #0b2f66;
  --saving: #12805c;
  --shadow: 0 18px 48px rgba(19, 28, 45, 0.08);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
}

button {
  font: inherit;
}

.app-shell {
  width: min(1180px, calc(100% - 48px));
  margin: 0 auto;
  padding: 44px 0;
}

.hero {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 24px;
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--accent);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 8px;
  font-size: clamp(34px, 5vw, 58px);
  line-height: 1.02;
  font-weight: 800;
  letter-spacing: 0;
}

.intro {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.5;
}

.catalog-note {
  flex: 0 0 auto;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  color: var(--muted);
  padding: 10px 13px;
  font-size: 13px;
  font-weight: 700;
}

.category-switch,
.mode-switch {
  display: inline-flex;
  gap: 4px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  padding: 4px;
  box-shadow: 0 10px 30px rgba(19, 28, 45, 0.05);
}

.category-switch {
  margin: 0 10px 16px 0;
}

.mode-switch {
  margin-bottom: 16px;
}

.category-button,
.mode-button {
  min-height: 38px;
  border: 0;
  border-radius: 6px;
  background: transparent;
  color: var(--muted);
  padding: 0 16px;
  font-size: 14px;
  font-weight: 800;
  cursor: pointer;
}

.category-button {
  min-width: 86px;
}

.category-button.is-active,
.mode-button.is-active {
  background: #111318;
  color: #fff;
}

.picker-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 360px;
  gap: 18px;
  align-items: start;
}

.picker-panel,
.result-panel,
.cart-panel {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.picker-panel {
  padding: 24px;
}

.picker-view {
  display: none;
  gap: 30px;
}

.picker-view.is-active {
  display: grid;
}

.step-title {
  display: flex;
  align-items: start;
  gap: 10px;
  margin-bottom: 14px;
}

.step-title span {
  display: grid;
  width: 28px;
  height: 28px;
  place-items: center;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  font-size: 14px;
  font-weight: 800;
}

.step-title h2 {
  margin-bottom: 0;
  font-size: 20px;
  line-height: 1.2;
  font-weight: 800;
}

.step-hint {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.35;
}

.step,
.result-panel,
.cart-panel {
  scroll-margin-top: 18px;
}

.step.is-next-focus,
.result-panel.is-next-focus,
.cart-panel.is-next-focus {
  border-radius: 8px;
  animation: next-step-focus 1.6s ease;
}

@keyframes next-step-focus {
  0%,
  100% {
    background: transparent;
    box-shadow: none;
  }

  18%,
  72% {
    background: #f7fcfb;
    box-shadow: 0 0 0 3px rgba(15, 118, 110, 0.16);
  }
}

.choice-grid {
  display: grid;
  gap: 10px;
}

.model-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.config-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.option-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.choice-card {
  position: relative;
  display: grid;
  gap: 8px;
  width: 100%;
  min-height: 84px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: var(--text);
  padding: 15px;
  text-align: left;
  cursor: pointer;
}

.choice-card:hover {
  border-color: rgba(15, 118, 110, 0.45);
  background: #fbfefd;
}

.choice-card.is-selected {
  border-color: var(--accent);
  background: var(--accent-soft);
  box-shadow: inset 0 0 0 1px var(--accent);
}

.choice-card.is-selected::after {
  content: "✓";
  position: absolute;
  top: 12px;
  right: 12px;
  display: grid;
  width: 22px;
  height: 22px;
  place-items: center;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  font-size: 13px;
  font-weight: 900;
}

.choice-card strong {
  font-size: 16px;
  line-height: 1.25;
  font-weight: 800;
}

.choice-card span {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.35;
}

.choice-card.is-unavailable {
  cursor: not-allowed;
  opacity: 0.42;
}

.choice-card .card-price {
  color: var(--accent-ink);
  font-size: 18px;
  font-weight: 850;
  font-variant-numeric: tabular-nums;
}

.choice-card .card-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.choice-card .card-meta span {
  border-radius: 6px;
  background: var(--surface-soft);
  color: var(--text);
  padding: 5px 7px;
  font-size: 12px;
  font-weight: 700;
}

.choice-card .card-meta .saving-meta {
  color: var(--saving);
}

.result-panel {
  position: sticky;
  top: 18px;
  padding: 22px;
}

.result-heading {
  margin-bottom: 22px;
}

.result-heading p {
  margin-bottom: 7px;
  color: var(--price-strong);
  font-size: 13px;
  font-weight: 800;
}

.result-heading h2 {
  margin-bottom: 0;
  font-size: 24px;
  line-height: 1.18;
  font-weight: 850;
}

.price-hero {
  border-radius: 8px;
  background: var(--price-strong);
  color: #fff;
  padding: 20px;
  margin-bottom: 18px;
}

.price-hero span {
  display: block;
  margin-bottom: 8px;
  color: rgba(255, 255, 255, 0.72);
  font-size: 13px;
  font-weight: 750;
}

.price-hero strong {
  display: block;
  font-size: clamp(34px, 5vw, 46px);
  line-height: 1;
  font-weight: 880;
  letter-spacing: 0;
  font-variant-numeric: tabular-nums;
}

.result-list {
  display: grid;
  gap: 0;
  margin: 0;
}

.result-list div {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 13px 0;
  border-bottom: 1px solid var(--line);
}

.result-list div:last-child {
  border-bottom: 0;
}

dt,
dd {
  margin: 0;
  font-size: 14px;
  line-height: 1.45;
}

dt {
  flex: 0 0 auto;
  color: var(--muted);
  font-weight: 700;
}

dd {
  text-align: right;
  font-weight: 800;
}

#result-saving {
  color: var(--saving);
}

.add-to-cart-button,
.tax-entry-button,
.quiet-button,
.reset-tax-button,
.rate-options button,
.segmented-control button,
.cart-tax-button,
.clear-cart-button,
.cart-item button {
  border: 0;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 850;
  cursor: pointer;
}

.add-to-cart-button {
  width: 100%;
  min-height: 46px;
  margin-top: 20px;
  background: var(--accent);
  color: #fff;
}

.add-to-cart-button:hover {
  background: var(--accent-ink);
}

.add-to-cart-button:disabled,
.cart-tax-button:disabled,
.clear-cart-button:disabled {
  cursor: not-allowed;
  opacity: 0.48;
}

.tax-entry-button {
  width: 100%;
  min-height: 46px;
  margin-top: 10px;
  border: 1px solid var(--accent);
  background: transparent;
  color: var(--accent-ink);
}

.tax-entry-button:hover {
  background: var(--accent-soft);
}

.cart-panel {
  margin-top: 18px;
  padding: 24px;
}

.cart-header {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 18px;
}

.section-label {
  margin-bottom: 7px;
  color: var(--accent);
  font-size: 13px;
  font-weight: 850;
}

.cart-header h2 {
  margin-bottom: 0;
  font-size: 26px;
  line-height: 1.15;
  font-weight: 850;
}

.cart-header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.cart-tax-button {
  min-height: 38px;
  border: 1px solid var(--accent);
  background: var(--accent-soft);
  color: var(--accent-ink);
  padding: 0 14px;
}

.cart-tax-button:hover:not(:disabled) {
  background: var(--accent);
  color: #fff;
}

.clear-cart-button {
  min-height: 38px;
  flex: 0 0 auto;
  background: var(--surface-soft);
  color: var(--text);
  padding: 0 14px;
}

.cart-summary {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
  margin-bottom: 18px;
}

.cart-summary div {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfcfe;
  padding: 15px;
}

.cart-summary span,
.cart-item span {
  display: block;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.35;
  font-weight: 700;
}

.cart-summary strong {
  display: block;
  margin-top: 8px;
  color: var(--price-strong);
  font-size: 24px;
  line-height: 1;
  font-weight: 880;
  font-variant-numeric: tabular-nums;
}

.cart-empty {
  border: 1px dashed var(--line);
  border-radius: 8px;
  background: #fbfcfe;
  color: var(--muted);
  padding: 20px;
  text-align: center;
  font-size: 14px;
  font-weight: 750;
}

.cart-items {
  display: grid;
  gap: 10px;
}

.cart-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto auto;
  align-items: center;
  gap: 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 14px;
}

.cart-item strong {
  display: block;
  margin-bottom: 5px;
  font-size: 16px;
  line-height: 1.25;
  font-weight: 850;
}

.cart-item-price {
  min-width: 118px;
  text-align: right;
}

.cart-item-price strong {
  color: var(--accent-ink);
  font-variant-numeric: tabular-nums;
}

.cart-item-price span {
  color: var(--saving);
}

.cart-item button {
  min-height: 36px;
  background: var(--surface-soft);
  color: var(--text);
  padding: 0 12px;
}

.comparison-wrap {
  margin-top: 18px;
  overflow-x: auto;
}

.comparison-table {
  width: 100%;
  min-width: 860px;
  border-collapse: collapse;
  font-size: 14px;
}

.comparison-table th,
.comparison-table td {
  border-bottom: 1px solid var(--line);
  padding: 13px 12px;
  text-align: left;
  vertical-align: top;
}

.comparison-table th {
  color: var(--muted);
  font-size: 12px;
  font-weight: 850;
}

.comparison-table td {
  line-height: 1.4;
  font-weight: 700;
}

.comparison-table tr:last-child td {
  border-bottom: 0;
}

.saving-cell {
  color: var(--saving);
}

.tax-panel {
  scroll-margin-top: 18px;
  margin-top: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: var(--shadow);
  padding: 24px;
}

.tax-header {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 22px;
}

.tax-header h2 {
  margin-bottom: 8px;
  font-size: 28px;
  line-height: 1.15;
  font-weight: 850;
}

.tax-intro,
.tax-disclaimer,
.field-help {
  color: var(--muted);
  line-height: 1.55;
}

.tax-intro {
  margin-bottom: 0;
  font-size: 14px;
}

.quiet-button,
.reset-tax-button {
  min-height: 42px;
  border: 0;
  background: var(--surface-soft);
  color: var(--text);
  padding: 0 15px;
}

.tax-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(340px, 0.82fr);
  gap: 22px;
  align-items: start;
}

.tax-controls {
  display: grid;
  gap: 18px;
  min-width: 0;
}

.tax-fieldset {
  min-width: 0;
  margin: 0;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 18px;
}

.tax-fieldset legend {
  padding: 0 8px;
  font-size: 15px;
  font-weight: 850;
}

.segmented-control,
.rate-options {
  display: grid;
  gap: 6px;
}

.segmented-control {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-bottom: 18px;
}

.rate-options {
  grid-template-columns: repeat(5, minmax(0, 1fr));
  margin-top: 12px;
}

.rate-options button,
.segmented-control button {
  min-height: 44px;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--muted);
  padding: 0 10px;
}

.rate-options button:hover,
.segmented-control button:hover {
  border-color: rgba(15, 118, 110, 0.5);
}

.rate-options button.is-active,
.segmented-control button.is-active {
  border-color: var(--accent);
  background: var(--accent-soft);
  color: var(--accent-ink);
  box-shadow: inset 0 0 0 1px var(--accent);
}

.field-label,
.select-field span {
  display: block;
  margin-bottom: 8px;
  color: var(--text);
  font-size: 13px;
  font-weight: 800;
}

.money-input-wrap,
.rate-input-wrap {
  display: flex;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  transition: border-color 160ms ease, box-shadow 160ms ease;
}

.money-input-wrap:focus-within,
.rate-input-wrap:focus-within,
.select-field select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(15, 118, 110, 0.14);
  outline: none;
}

.money-input-wrap > span,
.rate-input-wrap > span {
  flex: 0 0 auto;
  color: var(--muted);
  font-size: 18px;
  font-weight: 800;
}

.money-input-wrap > span {
  padding-left: 15px;
}

.money-input-wrap input,
.rate-input-wrap input {
  width: 100%;
  min-width: 0;
  border: 0;
  outline: 0;
  background: transparent;
  color: var(--text);
  font-variant-numeric: tabular-nums;
}

.money-input-wrap input {
  min-height: 54px;
  padding: 0 15px 0 9px;
  font-size: 24px;
  font-weight: 850;
}

.rate-input-wrap {
  max-width: 220px;
}

.rate-input-wrap input {
  min-height: 46px;
  padding: 0 8px 0 13px;
  font-size: 16px;
  font-weight: 800;
}

.rate-input-wrap > span {
  padding-right: 13px;
  font-size: 15px;
}

.custom-rate-field {
  margin-top: 14px;
}

.fixed-rate-display {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-top: 12px;
  border: 1px solid var(--accent);
  border-radius: 8px;
  background: var(--accent-soft);
  padding: 14px 16px;
  color: var(--accent-ink);
}

.fixed-rate-display strong {
  font-size: 24px;
  font-variant-numeric: tabular-nums;
}

.fixed-rate-display span {
  color: var(--muted);
  font-size: 12px;
  font-weight: 750;
  text-align: right;
}

.field-help,
.field-error {
  margin: 8px 0 0;
  font-size: 12px;
}

.field-error {
  color: #b42318;
  font-weight: 750;
}

.tax-select-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.select-field select {
  width: 100%;
  min-height: 46px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  color: var(--text);
  padding: 0 12px;
  font: inherit;
  font-weight: 700;
}

.deduction-status {
  display: grid;
  gap: 4px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 13px 15px;
}

.deduction-status strong {
  font-size: 14px;
}

.deduction-status span {
  color: var(--muted);
  font-size: 12px;
  line-height: 1.45;
}

.deduction-status.is-eligible {
  border-color: rgba(18, 128, 92, 0.28);
  background: #effaf5;
}

.deduction-status.is-eligible strong {
  color: var(--saving);
}

.deduction-status.is-ineligible {
  background: var(--surface-soft);
}

.reset-tax-button {
  justify-self: start;
}

.tax-results {
  position: sticky;
  top: 18px;
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
}

.tax-results.is-unavailable .tax-cost-hero,
.tax-results.is-unavailable .saving-highlight,
.tax-results.is-unavailable .tax-detail-list {
  opacity: 0.46;
}

.tax-cost-hero {
  background: var(--price-strong);
  color: #fff;
  padding: 24px;
}

.tax-cost-hero > span {
  display: block;
  margin-bottom: 9px;
  color: rgba(255, 255, 255, 0.72);
  font-size: 13px;
  font-weight: 750;
}

.tax-cost-hero strong {
  display: block;
  font-size: clamp(34px, 5vw, 48px);
  line-height: 1;
  font-weight: 880;
  font-variant-numeric: tabular-nums;
}

.tax-cost-hero p {
  margin: 12px 0 0;
  color: rgba(255, 255, 255, 0.66);
  font-size: 12px;
  line-height: 1.45;
}

.saving-highlight {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  border-bottom: 1px solid var(--line);
  background: #f5fbf8;
  padding: 16px 20px;
}

.saving-highlight span {
  color: var(--muted);
  font-size: 13px;
  font-weight: 750;
}

.saving-highlight strong {
  color: var(--saving);
  font-size: 22px;
  font-variant-numeric: tabular-nums;
}

.tax-detail-list {
  display: grid;
  margin: 0;
  padding: 8px 20px;
}

.tax-detail-list div {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  border-bottom: 1px solid var(--line);
  padding: 11px 0;
}

.tax-detail-list div:last-child {
  border-bottom: 0;
}

.tax-detail-list dd {
  font-variant-numeric: tabular-nums;
}

.tax-disclaimer {
  margin: 0;
  border-top: 1px solid var(--line);
  background: var(--surface-soft);
  padding: 16px 20px;
  font-size: 11px;
}

button:focus-visible,
input:focus-visible,
select:focus-visible {
  outline: 3px solid rgba(15, 118, 110, 0.2);
  outline-offset: 2px;
}

[hidden] {
  display: none !important;
}

.update-toast {
  position: fixed;
  right: 18px;
  bottom: 18px;
  z-index: 20;
  max-width: min(320px, calc(100% - 36px));
  border: 1px solid rgba(15, 118, 110, 0.22);
  border-radius: 8px;
  background: #111318;
  color: #fff;
  box-shadow: 0 18px 42px rgba(19, 28, 45, 0.18);
  padding: 12px 14px;
  font-size: 14px;
  line-height: 1.35;
  font-weight: 750;
}

@media (max-width: 980px) {
  .picker-layout {
    grid-template-columns: 1fr;
  }

  .result-panel {
    position: static;
  }

  .tax-layout {
    grid-template-columns: 1fr;
  }

  .tax-results {
    position: static;
  }
}

@media (max-width: 720px) {
  .app-shell {
    width: min(100% - 28px, 1180px);
    padding: 28px 0 calc(28px + env(safe-area-inset-bottom));
  }

  .hero {
    align-items: stretch;
    flex-direction: column;
  }

  .catalog-note {
    width: fit-content;
  }

  .mode-switch {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    width: 100%;
  }

  .category-switch {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    width: 100%;
    margin-right: 0;
  }

  .picker-panel {
    padding: 18px;
  }

  .model-grid,
  .config-grid,
  .option-grid {
    grid-template-columns: 1fr;
  }

  .choice-card {
    min-height: 0;
  }

  .cart-panel {
    padding: 18px;
  }

  .tax-panel {
    padding: 18px;
  }

  .tax-header {
    align-items: stretch;
    flex-direction: column;
  }

  .quiet-button,
  .reset-tax-button {
    width: 100%;
  }

  .segmented-control,
  .tax-select-grid {
    grid-template-columns: 1fr;
  }

  .rate-options {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .cart-header {
    align-items: stretch;
    flex-direction: column;
  }

  .cart-header-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .cart-tax-button,
  .clear-cart-button {
    width: 100%;
  }

  .cart-summary {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .cart-item {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .cart-item-price {
    min-width: 0;
    text-align: left;
  }
}

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

  .tax-fieldset {
    padding: 14px;
  }

  .fixed-rate-display {
    align-items: flex-start;
    flex-direction: column;
    gap: 4px;
  }

  .fixed-rate-display span {
    text-align: left;
  }

  .rate-options {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .tax-cost-hero strong {
    font-size: 34px;
  }

  .tax-detail-list div {
    align-items: start;
    flex-direction: column;
    gap: 4px;
  }

  .tax-detail-list dd {
    text-align: left;
  }
}