*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  display: flex;
  min-height: 100vh;
  flex-direction: column;
  margin: 0;
  background: var(--background);
  color: var(--foreground);
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1,
h2,
h3,
h4 {
  margin: 0;
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

h1 {
  font-size: clamp(2rem, 4vw, 2.85rem);
}

h2 {
  font-size: clamp(1.4rem, 2.5vw, 1.8rem);
}

h3 {
  font-size: 1.1rem;
}

h2 + p,
h3 + p {
  margin-top: 0.5rem;
}

p {
  margin: 0 0 1rem;
}

p:last-child {
  margin-bottom: 0;
}

a {
  color: var(--primary);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

img,
svg {
  max-width: 100%;
}

.icon {
  flex-shrink: 0;
}

.btn:hover,
.site-brand:hover,
.site-nav a:hover {
  text-decoration: none;
}

a.btn {
  color: var(--primary-foreground);
}

a.btn[data-variant="outline"],
a.btn[data-variant="secondary"],
a.btn[data-variant="ghost"] {
  color: var(--foreground);
}

.card > header :is(h2, h3) {
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0;
  line-height: 1.4;
}

.card[data-size="sm"] > header :is(h2, h3) {
  font-size: 0.95rem;
}

.card > header > p {
  margin: 0;
}

.alert > :is(h2, h3) {
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0;
  line-height: 1.4;
}

.alert p {
  margin: 0;
}

.container {
  width: 100%;
  max-width: 1120px;
  margin-inline: auto;
  padding-inline: 20px;
}

.site-main {
  flex: 1;
  padding-block: 40px 64px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  border-bottom: 1px solid var(--border);
  background: var(--background);
}

.site-header__inner {
  display: flex;
  min-height: 68px;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 24px;
  padding-block: 12px;
}

.site-brand {
  color: var(--foreground);
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.site-brand:hover {
  color: var(--primary);
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 4px;
}

.site-nav a {
  padding: 7px 11px;
  border-radius: var(--radius-md);
  color: var(--muted-foreground);
  font-size: 0.92rem;
  font-weight: 500;
  transition: background-color 0.15s ease, color 0.15s ease;
}

.site-nav a:hover {
  background: var(--accent);
  color: var(--accent-foreground);
}

.site-nav a[aria-current="page"] {
  background: var(--accent);
  color: var(--primary);
  font-weight: 600;
}

.site-footer {
  margin-top: auto;
  border-top: 1px solid var(--border);
  background: var(--muted);
  color: var(--muted-foreground);
  font-size: 0.875rem;
}

.site-footer__inner {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding-block: 28px;
}

.site-footer p {
  margin: 0;
}

.site-footer strong {
  color: var(--foreground);
}

.text-muted {
  color: var(--muted-foreground);
}

.text-primary {
  color: var(--primary);
}

.text-positive {
  color: var(--positive);
}

.text-negative {
  color: var(--destructive);
}

.text-small {
  font-size: 0.875rem;
}

.stack {
  display: flex;
  flex-direction: column;
  gap: var(--stack-gap, 16px);
}

.sidebar {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.info-stack {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.cluster {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
}

.grid-2,
.grid-3,
.grid-4 {
  display: grid;
  gap: 20px;
}

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

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

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

.section {
  padding-block: 22px;
}

.section-heading {
  max-width: 640px;
  margin: 0 auto 28px;
  text-align: center;
}

.section-heading .eyebrow {
  display: inline-block;
  margin-bottom: 8px;
  color: var(--primary);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.section-heading p {
  margin: 8px 0 0;
  color: var(--muted-foreground);
}

.page-header {
  max-width: 760px;
  margin-bottom: 28px;
}

.page-header .badge {
  margin-bottom: 12px;
}

.page-header p {
  margin: 8px 0 0;
  color: var(--muted-foreground);
}

.flash-stack {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 24px;
}

.hero {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  align-items: center;
  gap: 48px;
  padding-block: 24px 40px;
}

.hero .badge {
  margin-bottom: 16px;
}

.hero h1 {
  max-width: 15ch;
  margin-bottom: 18px;
}

.hero-lead {
  max-width: 56ch;
  margin-bottom: 24px;
  color: var(--muted-foreground);
  font-size: 1.05rem;
}

.hero-note {
  margin: 20px 0 0;
  color: var(--muted-foreground);
  font-size: 0.85rem;
}

.hero-visual {
  background: var(--card);
}

.hero-visual__eyebrow {
  margin: 0;
  color: var(--muted-foreground);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hero-visual header h2 {
  margin-top: 2px;
}

.chart-label {
  margin-bottom: 8px;
  color: var(--muted-foreground);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.hero-chart {
  width: 100%;
  height: auto;
}

.hero-summary {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 16px;
}

.hero-summary__item {
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--muted);
}

.hero-summary__item p {
  margin: 0;
  color: var(--muted-foreground);
  font-size: 0.78rem;
}

.hero-summary__item strong {
  color: var(--foreground);
  font-size: 0.9rem;
}

.hero-visual__note {
  margin: 16px 0 0;
  color: var(--muted-foreground);
  font-size: 0.8rem;
}

.stat-card {
  background: var(--muted);
}

.stat-value {
  margin: 0;
  color: var(--primary);
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1.1;
}

.stat-label {
  margin: 4px 0 0;
  color: var(--muted-foreground);
  font-size: 0.88rem;
}

.feature-card h3 {
  margin-bottom: 6px;
}

.feature-card p {
  margin: 0;
  color: var(--muted-foreground);
}

.feature-icon {
  display: inline-flex;
  width: 42px;
  height: 42px;
  align-items: center;
  justify-content: center;
  margin-bottom: 14px;
  border-radius: var(--radius-md);
  background: var(--accent);
  color: var(--accent-foreground);
}

.method-card {
  background: linear-gradient(135deg, var(--accent), var(--background) 70%);
}

.method-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 32px;
}

.method-inner .badge {
  margin-bottom: 12px;
}

.method-inner p {
  margin: 0;
  color: var(--muted-foreground);
}

.method-badge {
  min-width: 180px;
  padding: 18px 26px;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--background);
  text-align: center;
}

.method-badge span {
  display: block;
  color: var(--muted-foreground);
  font-size: 0.78rem;
}

.method-badge strong {
  display: block;
  margin-block: 2px;
  color: var(--primary);
  font-size: 1.75rem;
  line-height: 1.15;
}

.cta-card {
  background: var(--accent);
}

.cta-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 20px 32px;
}

.cta-inner h2 {
  margin-bottom: 4px;
}

.cta-inner p {
  margin: 0;
  color: var(--muted-foreground);
}

.form-layout {
  display: grid;
  grid-template-columns: 1.6fr 1fr;
  align-items: start;
  gap: 24px;
}

.form-fields {
  display: flex;
  flex-direction: column;
  gap: 22px;
  margin-bottom: 26px;
}

.form-card select.select {
  width: 100%;
  appearance: none;
  -webkit-appearance: none;
  background-color: var(--background);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2364748b' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.75rem center;
  background-size: 1rem;
  color: var(--foreground);
}

.form-card select.select option {
  background-color: var(--background);
  color: var(--foreground);
}

.form-card .btn-block {
  width: 100%;
}

.upload-box {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 24px;
  border: 1.5px dashed var(--border);
  border-radius: var(--radius-lg);
  background: var(--muted);
  text-align: center;
  transition: border-color 0.15s ease, background-color 0.15s ease;
}

.upload-box:hover,
.upload-box:focus-within {
  border-color: var(--ring);
  background: var(--accent);
}

.upload-icon {
  display: inline-flex;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  margin-bottom: 4px;
  border-radius: var(--radius-md);
  background: var(--background);
  color: var(--primary);
}

.upload-title {
  margin: 0;
  font-weight: 600;
}

.upload-text {
  margin: 0;
  color: var(--muted-foreground);
  font-size: 0.85rem;
}

.file-input {
  width: 100%;
  max-width: 320px;
  margin-top: 10px;
  color: var(--foreground);
  font-size: 0.85rem;
}

.file-input::file-selector-button {
  margin-inline-end: 10px;
  padding: 6px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--background);
  color: var(--foreground);
  cursor: pointer;
  font: inherit;
  font-weight: 500;
}

.file-input::file-selector-button:hover {
  background: var(--secondary);
}

.upload-rules {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin: 0;
  padding: 14px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--muted);
  color: var(--muted-foreground);
  font-size: 0.875rem;
  list-style: none;
}

.upload-rules li {
  display: flex;
  align-items: center;
  gap: 10px;
}

.upload-rules .icon {
  color: var(--accent-foreground);
}

.file-hint {
  display: inline-flex;
  align-self: flex-start;
  max-width: 100%;
  margin: 0;
  padding: 6px 12px;
  border-radius: 999px;
  background: var(--accent);
  color: var(--accent-foreground);
  font-size: 0.85rem;
  font-weight: 500;
  overflow-wrap: anywhere;
}

.file-hint:empty {
  display: none;
}

.field-error {
  margin: 0;
  color: var(--destructive);
  font-size: 0.85rem;
  font-weight: 500;
}

.field[data-invalid] > label,
.field[data-invalid] .upload-title {
  color: var(--destructive);
}

.field[data-invalid] .upload-box {
  border-color: var(--destructive);
  background: color-mix(in oklab, var(--destructive) 5%, var(--background));
}

.field[data-invalid] .upload-box:hover,
.field[data-invalid] .upload-box:focus-within {
  border-color: var(--destructive);
  background: color-mix(in oklab, var(--destructive) 8%, var(--background));
}

.field[data-invalid] :focus-visible {
  outline-color: var(--destructive);
}

.field[data-invalid] select.select,
.field[data-invalid] select.select:focus {
  border-color: var(--destructive);
  box-shadow: 0 0 0 3px color-mix(in oklab, var(--destructive) 15%, transparent);
}

.info-row {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}

.info-row:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.info-row__label {
  color: var(--muted-foreground);
  font-size: 0.76rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.info-row__value {
  color: var(--foreground);
  font-weight: 600;
}

.simple-steps {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin: 0;
  padding-left: 20px;
  color: var(--muted-foreground);
  font-size: 0.9rem;
  list-style: decimal;
}

.simple-steps li {
  padding-left: 2px;
}

.info-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.fact-card .info-row {
  padding-bottom: 0;
  border-bottom: 0;
}

.summary-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.summary-card .summary-label {
  margin: 0;
  color: var(--muted-foreground);
  font-size: 0.8rem;
}

.summary-card .summary-value {
  margin: 6px 0 0;
  font-size: 1.65rem;
  font-weight: 700;
  line-height: 1.2;
}

.summary-card .summary-note {
  margin: 6px 0 0;
  color: var(--muted-foreground);
  font-size: 0.78rem;
}

.detail-stack {
  display: flex;
  flex-direction: column;
  gap: 24px;
  margin-bottom: 24px;
}

.detail-card p {
  color: var(--muted-foreground);
}

.chart-placeholder {
  display: grid;
  min-height: 260px;
  place-items: center;
  padding: 32px;
  border: 1px dashed var(--border);
  border-radius: var(--radius-lg);
  background: var(--muted);
  text-align: center;
}

.chart-placeholder__content strong {
  display: block;
  margin-bottom: 6px;
  color: var(--foreground);
}

.chart-placeholder__content p {
  max-width: 44ch;
  margin: 0;
  color: var(--muted-foreground);
  font-size: 0.9rem;
}

.action-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 8px;
}

.empty-state__inner {
  display: flex;
  max-width: 520px;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  margin-inline: auto;
  padding-block: 24px;
  text-align: center;
}

.empty-state__icon {
  display: inline-flex;
  width: 60px;
  height: 60px;
  align-items: center;
  justify-content: center;
  margin-bottom: 4px;
  border-radius: 999px;
  background: var(--accent);
  color: var(--accent-foreground);
}

.empty-state__inner p {
  margin: 0;
  color: var(--muted-foreground);
}

.empty-state__inner .btn {
  margin-top: 8px;
}

.fact-card {
  background: var(--muted);
}

.summary-card--highlight {
  border-color: var(--primary);
  background: var(--primary);
  color: var(--primary-foreground);
}

.summary-card--highlight .summary-label,
.summary-card--highlight .summary-note {
  color: var(--primary-foreground);
}

.change-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: 999px;
  font-size: 1.15rem;
  font-weight: 700;
  line-height: 1.4;
}

.change-pill--up {
  background: color-mix(in oklab, var(--positive) 12%, var(--background));
  color: var(--positive);
}

.change-pill--down {
  background: color-mix(in oklab, var(--destructive) 10%, var(--background));
  color: var(--destructive);
}

.card-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 1.1rem;
}

.card-title .icon {
  color: var(--primary);
}

.chart-frame {
  padding: 8px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--background);
}

.result-table td:last-child,
.result-table th:last-child {
  text-align: right;
}

.result-table td:last-child {
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}

.disclaimer {
  background: var(--muted);
}

.disclaimer__lead {
  color: var(--foreground);
  font-weight: 600;
}

.page-hero {
  padding: 40px;
  margin-bottom: 28px;
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  background: var(--muted);
}

.page-hero .badge {
  margin-bottom: 12px;
}

.page-hero p {
  max-width: 680px;
  margin: 12px 0 0;
  color: var(--muted-foreground);
  font-size: 1.02rem;
}

.page-stack {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.method-callout {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 18px;
  align-items: start;
  margin-top: 16px;
}

.method-callout__icon {
  display: inline-flex;
  width: 46px;
  height: 46px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  background: var(--accent);
  color: var(--accent-foreground);
}

.method-callout h3 {
  margin-bottom: 4px;
}

.method-callout p {
  margin: 0;
  color: var(--muted-foreground);
}

.data-card .card-label {
  color: var(--muted-foreground);
  font-size: 0.76rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.data-card strong {
  display: block;
  margin-block: 4px 6px;
  color: var(--foreground);
  font-size: 1.15rem;
}

.data-card p {
  margin: 0;
  color: var(--muted-foreground);
}

.steps {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
}

.step {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  align-items: start;
}

.step .badge {
  height: 30px;
  min-width: 30px;
  padding-inline: 8px;
  font-size: 0.85rem;
}

.step h3 {
  margin-bottom: 2px;
  font-size: 1rem;
}

.step p {
  margin: 0;
  color: var(--muted-foreground);
}

.csv-dialog {
  position: fixed;
  inset: 0;
  height: fit-content;
  margin: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 0;
  max-width: 400px;
  width: calc(100% - 32px);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
}

.csv-dialog::backdrop {
  background: rgba(0, 0, 0, 0.45);
}

.csv-dialog__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  padding: 32px 28px;
  text-align: center;
}

.csv-dialog__icon {
  display: inline-flex;
  width: 56px;
  height: 56px;
  align-items: center;
  justify-content: center;
  margin-bottom: 4px;
  border-radius: 999px;
  background: color-mix(in oklab, var(--destructive) 10%, var(--background));
  color: var(--destructive);
}

.csv-dialog h2 {
  margin: 0;
  font-size: 1.1rem;
}

.csv-dialog p {
  margin: 0;
  max-width: 30ch;
  color: var(--muted-foreground);
  font-size: 0.925rem;
}

.csv-dialog .btn {
  margin-top: 8px;
}

.alert {
  border-color: var(--border);
}

.alert[data-variant="destructive"] {
  border-color: color-mix(in oklab, var(--destructive) 35%, var(--border));
  background: color-mix(in oklab, var(--destructive) 5%, var(--card));
}

@media (max-width: 1024px) {
  .hero {
    grid-template-columns: minmax(0, 1fr);
    gap: 32px;
  }

  .hero h1 {
    max-width: none;
  }

  .form-layout {
    grid-template-columns: minmax(0, 1fr);
  }

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

  .grid-3,
  .grid-4 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .method-inner {
    grid-template-columns: minmax(0, 1fr);
  }

  .method-badge {
    justify-self: start;
    text-align: left;
  }
}

@media (max-width: 640px) {
  .container {
    padding-inline: 16px;
  }

  .site-main {
    padding-block: 28px 48px;
  }

  .site-header__inner {
    gap: 6px 16px;
  }

  .site-nav a {
    padding: 5px 8px;
    font-size: 0.85rem;
  }

  h1 {
    font-size: 1.85rem;
  }

  h2 {
    font-size: 1.35rem;
  }

  .grid-2,
  .grid-3,
  .grid-4,
  .info-grid,
  .summary-grid,
  .hero-summary {
    grid-template-columns: minmax(0, 1fr);
  }

  .cluster .btn,
  .form-card .btn-block {
    width: 100%;
  }

  .cta-inner .btn,
  .action-row .btn,
  .empty-state__inner .btn {
    width: 100%;
  }

  .page-hero {
    padding: 24px;
  }

  .method-callout {
    grid-template-columns: minmax(0, 1fr);
  }

  .chart-placeholder {
    min-height: 200px;
    padding: 20px;
  }
}

:where(a, button, input, select, textarea, [tabindex]):focus-visible {
  outline: 2px solid var(--ring);
  outline-offset: 2px;
}

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

.animate-spin {
  animation: spin 0.8s linear infinite;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }

  .animate-spin {
    animation: none;
  }
}