@font-face {
  font-family: 'Albert Sans';
  src: url('/assets/fonts/albert-sans-variable.ttf') format('truetype');
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
}

:root {
  --canvas: #f7f8f5;
  --surface: #ffffff;
  --ink: #242b26;
  --muted: #58635b;
  --accent: #285443;
  --accent-hover: #1d4233;
  --sage: #e7eee6;
  --sage-deep: #dbe5da;
  --soft: #eef1eb;
  --field-border: #aeb9ad;
  --radius: 6px;
  --small: 14px;
  --body: 16px;
  --lead: 20px;
  --heading: 28px;
  --display: clamp(44px, 5.6vw, 76px);
  color-scheme: light;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 24px; }
body {
  margin: 0;
  background: var(--canvas);
  color: var(--ink);
  font-family: 'Albert Sans', Arial, sans-serif;
  font-size: var(--body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
button, input, select { font: inherit; }
button, a, input, select { -webkit-tap-highlight-color: transparent; }
button { cursor: pointer; }
a { color: inherit; text-decoration: none; }
a, button { touch-action: manipulation; }
svg { display: block; flex-shrink: 0; }
::selection { background: var(--sage-deep); color: var(--ink); }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 4px; }
h1, h2, h3, h4, p { margin: 0; }
h1, h2, h3, h4 { font-weight: 600; text-wrap: balance; }
h1 { font-size: var(--display); line-height: 1.05; letter-spacing: -.045em; }
h2 { font-size: var(--heading); line-height: 1.2; letter-spacing: -.025em; }
h3 { font-size: var(--lead); line-height: 1.3; letter-spacing: -.015em; }
p { max-width: 65ch; }
.container { width: min(1120px, calc(100% - 64px)); margin-inline: auto; }
.skip-link { position: fixed; z-index: 100; top: 12px; left: 12px; padding: 12px 16px; background: var(--accent); color: var(--surface); transform: translateY(-180%); }
.skip-link:focus { transform: translateY(0); }
.site-header { position: relative; z-index: 10; }
.nav-wrap { min-height: 88px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: inline-flex; align-items: center; min-height: 44px; }
.brand-word { font-size: var(--heading); font-weight: 650; letter-spacing: -.055em; line-height: 1.3; }
.header-nav { display: flex; align-items: center; gap: 32px; }
.header-nav a { font-size: var(--body); padding-block: 10px; }
.header-nav a:hover, .header-nav a[aria-current] { color: var(--accent); text-decoration: underline; text-underline-offset: 6px; }
.menu-button { display: none; align-items: center; gap: 12px; padding: 10px 12px; color: var(--ink); background: var(--soft); border: 0; border-radius: var(--radius); min-height: 44px; }
.hero { padding-block: 40px 64px; }
.hero-inner { display: grid; grid-template-columns: 1fr 1fr; align-items: center; gap: 72px; }
.hero-copy h1 { margin-bottom: 28px; }
.hero-copy > p:first-of-type { font-size: var(--lead); max-width: 33ch; line-height: 1.55; }
.hero-copy .text-link { margin-top: 24px; }
.hero-note { color: var(--muted); font-size: var(--small); margin-top: 40px; }
.text-link { display: inline-flex; align-items: center; gap: 12px; min-height: 44px; color: var(--accent); font-weight: 600; }
.text-link:hover { text-decoration: underline; text-underline-offset: 5px; }
.text-link span, .tool-arrow { transition: transform .18s ease; }
.text-link:hover span, .tool-row:hover .tool-arrow { transform: translateX(3px); }
.quick-calc { background: var(--sage); border-radius: var(--radius); padding: 28px; }
.quick-title { font-weight: 600; font-size: var(--body); margin-bottom: 24px; }
.quick-fields { display: grid; grid-template-columns: 1fr 1fr 1.2fr; gap: 18px 16px; }
.quick-tariff { grid-column: auto; }
.quick-tariff .input-wrap { max-width: 100%; }
.field { display: flex; flex-direction: column; gap: 8px; min-width: 0; }
.field label { font-size: var(--body); font-weight: 500; line-height: 1.4; }
.field small { font-size: var(--small); line-height: 1.5; color: var(--muted); }
.input-wrap { position: relative; }
.input-wrap input { width: 100%; min-width: 0; height: 50px; border: 1px solid var(--field-border); border-radius: var(--radius); padding: 10px 58px 10px 14px; background: var(--surface); color: var(--ink); font-size: var(--body); font-weight: 500; font-variant-numeric: tabular-nums; }
.input-wrap input:focus { border-color: var(--accent); }
.input-wrap input::-webkit-inner-spin-button { margin-right: -4px; }
.input-wrap .unit { position: absolute; right: 14px; top: 50%; transform: translateY(-50%); font-size: var(--small); color: var(--muted); pointer-events: none; }
.quick-tariff input { padding-right: 68px; }
.field select { width: 100%; min-width: 0; height: 50px; border: 1px solid var(--field-border); border-radius: var(--radius); background: var(--surface); color: var(--ink); padding: 8px 10px; font-size: var(--small); }
.quick-result { margin: 28px 0 24px; }
.quick-result > span { font-size: var(--body); }
.quick-result > output { display: block; font-size: clamp(44px, 4.7vw, 64px); font-weight: 600; line-height: 1.15; letter-spacing: -.04em; margin: 6px 0 8px; font-variant-numeric: tabular-nums; overflow-wrap: anywhere; }
.quick-result p { color: var(--muted); font-size: var(--small); }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 16px; min-height: 48px; border: 0; border-radius: var(--radius); padding: 12px 20px; font-size: var(--body); font-weight: 500; line-height: 1.4; transition: transform .15s ease, opacity .15s ease; }
.btn-primary { color: var(--surface); background: var(--accent); }
.btn-primary:hover { background: var(--accent-hover); }
.btn-outline { background: var(--soft); color: var(--ink); }
.btn-outline:hover { background: var(--sage); }
.btn:active { transform: translateY(1px); }
.quick-calc .btn { width: 100%; }
.tool-section { padding-bottom: 88px; scroll-margin-top: 32px; }
.directory-layout { display: grid; grid-template-columns: 260px minmax(0, 1fr); gap: 52px; align-items: start; }
.directory-intro { padding-top: 20px; }
.directory-intro p { margin-top: 16px; max-width: 22ch; }
.tool-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 6px; }
.tool-row { display: grid; grid-template-columns: minmax(0, 1fr) auto 22px; gap: 20px; align-items: center; min-height: 108px; padding: 22px 24px; border-radius: var(--radius); }
.tool-list li:nth-child(odd) .tool-row { background: var(--soft); }
.tool-row:hover, .tool-list li:nth-child(odd) .tool-row:hover { background: var(--sage); }
.tool-row h3 { font-size: var(--lead); }
.tool-row p { font-size: var(--body); line-height: 1.5; margin-top: 5px; max-width: 38ch; }
.tool-output { font-size: var(--small); color: var(--muted); white-space: nowrap; }
.tool-arrow { color: var(--accent); }
.method-section { background: var(--sage); padding-block: 52px; }
.method-layout { display: grid; grid-template-columns: 260px minmax(0, 1fr); gap: 52px; }
.method-layout p { max-width: 58ch; }
.method-layout .formula-inline { font-size: var(--lead); font-weight: 500; margin: 20px 0 12px; letter-spacing: -.015em; }
.site-footer { padding-block: 40px 32px; }
.footer-top, .footer-bottom { display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.footer-top nav { display: flex; gap: 28px; flex-wrap: wrap; }
.footer-top nav a { padding-block: 8px; }
.footer-top nav a:hover { color: var(--accent); text-decoration: underline; text-underline-offset: 5px; }
.footer-bottom { margin-top: 20px; align-items: baseline; }
.footer-bottom p { color: var(--muted); font-size: var(--small); }
.page-head { padding-block: 32px 40px; }
.breadcrumbs { font-size: var(--small); color: var(--muted); margin-bottom: 24px; }
.breadcrumbs a { text-decoration: underline; text-underline-offset: 4px; }
.page-head h1 { font-size: clamp(34px, 4.3vw, 52px); max-width: 26ch; margin-bottom: 20px; }
.page-head p { font-size: var(--lead); max-width: 62ch; line-height: 1.55; }
.calc-section { padding-bottom: 72px; }
.calc-grid { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr); gap: 24px; align-items: start; }
.form-card { background: var(--surface); border-radius: var(--radius); padding: 32px; }
.form-card h2, .results-card h2 { font-size: var(--lead); margin-bottom: 8px; }
.form-intro, .results-intro { font-size: var(--body); margin-bottom: 24px; }
.form-intro a { color: var(--accent); text-decoration: underline; text-underline-offset: 3px; }
.field-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px 20px; }
.field.full { grid-column: 1 / -1; }
.form-divider { height: 20px; }
.form-subtitle { font-size: var(--lead); font-weight: 500; margin: 12px 0 20px; }
.form-actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 28px; }
.share-status { font-size: var(--small); color: var(--accent); margin-top: 12px; }
.share-status:empty { display: none; }
.examples { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 24px; }
.example-chip { min-height: 40px; padding: 8px 12px; border: 0; border-radius: var(--radius); background: var(--soft); color: var(--ink); font-size: var(--small); }
.example-chip:hover, .example-chip[aria-pressed="true"] { background: var(--sage-deep); }
.results-card { position: sticky; top: 24px; background: var(--sage); border-radius: var(--radius); padding: 32px; scroll-margin-top: 20px; }
.result-top { margin-block: 28px 24px; }
.result-kicker { display: block; font-size: var(--body); }
.result-big { display: block; font-size: clamp(36px, 3.8vw, 52px); line-height: 1.15; font-weight: 600; letter-spacing: -.04em; margin-block: 8px 12px; font-variant-numeric: tabular-nums; overflow-wrap: anywhere; }
.result-sub { display: block; font-size: var(--small); color: var(--muted); }
.stat-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px 16px; margin: 32px 0; }
.result-stat { display: flex; flex-direction: column; gap: 6px; min-width: 0; }
.result-stat > span, .result-stat small { font-size: var(--small); color: var(--muted); }
.result-stat strong { font-size: var(--lead); line-height: 1.4; font-weight: 600; font-variant-numeric: tabular-nums; overflow-wrap: anywhere; }
.result-chart { margin-block: 32px; }
.result-chart > p { font-size: var(--small); margin-bottom: 14px; }
.bar-row { display: grid; grid-template-columns: 60px minmax(0, 1fr) 100px; gap: 12px; align-items: center; font-size: var(--small); margin: 14px 0; }
.bar-row b { text-align: right; font-weight: 500; font-variant-numeric: tabular-nums; overflow-wrap: anywhere; }
.bar-track { height: 6px; background: var(--sage-deep); border-radius: 2px; overflow: hidden; }
.bar-fill { height: 100%; background: var(--accent); }
.result-disclaimer { font-size: var(--small); line-height: 1.6; }
.result-disclaimer a { color: var(--accent); text-decoration: underline; text-underline-offset: 3px; }
.content-area { padding-bottom: 72px; }
.content-grid { display: grid; grid-template-columns: minmax(0, 720px) minmax(0, 1fr); gap: 72px; align-items: start; }
.article-card h2 { margin-bottom: 20px; }
.article-card h3 { margin: 32px 0 12px; }
.article-card p, .article-card li { font-size: var(--body); line-height: 1.75; }
.article-card p + p { margin-top: 16px; }
.calculator-help { margin-top: 40px; }
.calculator-help h2 { font-size: var(--heading); }
.article-card a { color: var(--accent); text-decoration: underline; text-underline-offset: 4px; }
.article-card .formula { background: var(--soft); border-radius: var(--radius); padding: 20px; margin-block: 24px; font-size: var(--body); line-height: 1.75; overflow-wrap: anywhere; }
.callout { margin-top: 28px; padding: 20px; background: var(--sage); border-radius: var(--radius); font-size: var(--body); }
.side-card { padding-top: 4px; }
.side-card h2 { font-size: var(--lead); margin-bottom: 20px; }
.side-card a { display: flex; gap: 12px; justify-content: space-between; font-size: var(--body); padding-block: 12px; }
.side-card a:hover { color: var(--accent); text-decoration: underline; text-underline-offset: 4px; }
.side-card a span { flex-shrink: 0; }
.article-wide { max-width: 740px; padding-block: 12px 72px; }
.article-wide h2 { margin-top: 24px; }
.page-head .actions { margin-top: 28px; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }

@media (prefers-reduced-motion: no-preference) {
  .hero-copy, .quick-calc { animation: enter .35s ease-out both; }
  .quick-calc { animation-delay: .06s; }
  @keyframes enter { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }
}

@media (max-width: 1100px) {
  .quick-fields { grid-template-columns: 1fr 1fr; }
  .quick-tariff { grid-column: 1 / -1; }
  .hero-inner { gap: 36px; }
  .hero { padding-block: 40px 64px; }
  .quick-calc { padding: 24px; }
  .directory-layout, .method-layout { grid-template-columns: 210px minmax(0, 1fr); gap: 24px; }
  .tool-row { grid-template-columns: minmax(0, 1fr) 22px; gap: 16px; }
  .tool-output { grid-row: 2; }
  .tool-arrow { grid-column: 2; grid-row: 1 / 3; }
  .calc-grid { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 20px; }
  .form-card, .results-card { padding: 24px; }
  .field-grid { gap: 20px 16px; }
  .content-grid { gap: 40px; grid-template-columns: minmax(0, 1fr) 240px; }
  .bar-row { grid-template-columns: 52px minmax(0, 1fr) 88px; gap: 8px; }
}

@media (max-width: 760px) {
  .container { width: calc(100% - 40px); }
  .nav-wrap { min-height: 80px; }
  .brand-word { font-size: 26px; }
  .header-nav { gap: 20px; }
  .hero { padding-block: 32px 56px; }
  .hero-inner { grid-template-columns: 1fr; gap: 32px; }
  .hero-copy h1 { max-width: 13ch; margin-bottom: 20px; }
  .hero-copy > p:first-of-type { max-width: 37ch; }
  .hero-note { margin-top: 16px; }
  .hero-copy .text-link { margin-top: 14px; }
  .quick-calc { padding: 24px; }
  .quick-fields { grid-template-columns: 1fr 1fr 1.3fr; gap: 12px; }
  .quick-tariff { grid-column: auto; }
  .quick-result { margin-top: 24px; }
  .directory-layout, .method-layout { grid-template-columns: 1fr; gap: 24px; }
  .directory-intro { padding-top: 0; }
  .directory-intro p { max-width: none; margin-top: 12px; }
  .tool-section { padding-bottom: 56px; }
  .tool-row { padding: 20px; }
  .tool-output { grid-row: auto; }
  .tool-arrow { grid-row: 1 / 3; }
  .method-section { padding-block: 36px; }
  .calc-grid { grid-template-columns: 1fr; }
  .results-card { position: static; }
  .page-head { padding-block: 24px 32px; }
  .page-head p { font-size: var(--body); }
  .calc-section { padding-bottom: 48px; }
  .content-grid { grid-template-columns: 1fr; gap: 40px; }
  .side-card { padding: 24px; background: var(--soft); border-radius: var(--radius); }
  .footer-top { align-items: flex-start; }
  .footer-top nav { gap: 4px 20px; }
  .footer-bottom { flex-direction: column; gap: 8px; }
}

@media (max-width: 540px) {
  :root { --display: 44px; --heading: 26px; }
  .nav-wrap { min-height: 76px; }
  .menu-button { display: inline-flex; }
  .header-nav { display: none; position: absolute; top: 72px; left: 20px; right: 20px; padding: 16px 20px; background: var(--soft); border-radius: var(--radius); }
  .header-nav.is-open { display: flex; flex-direction: column; align-items: stretch; gap: 4px; }
  .header-nav a { min-height: 44px; padding-block: 10px; }
  .hero { padding-top: 16px; }
  .hero-copy > p:first-of-type { font-size: var(--body); }
  .hero-inner { gap: 28px; }
  .quick-calc { padding: 20px; }
  .quick-title { margin-bottom: 20px; }
  .quick-fields { grid-template-columns: 1fr 1fr; gap: 16px; }
  .quick-tariff { grid-column: 1 / -1; }
  .quick-result > output { font-size: 44px; }
  .tool-row { gap: 8px 14px; padding: 20px 16px; }
  .tool-row h3 { font-size: var(--lead); }
  .tool-row p { margin-top: 8px; }
  .tool-output { grid-column: 1; }
  .tool-arrow { align-self: start; margin-top: 4px; }
  .method-layout .formula-inline { font-size: var(--body); }
  .footer-top { flex-direction: column; gap: 12px; }
  .footer-top nav { gap: 20px; }
  .site-footer { padding-block: 28px; }
  .page-head h1 { font-size: 34px; max-width: 21ch; }
  .breadcrumbs { margin-bottom: 20px; }
  .form-card, .results-card { padding: 20px; }
  .field-grid { gap: 22px 16px; }
  .field label { min-height: 44px; display: flex; align-items: flex-end; }
  .quick-calc .field label { min-height: auto; }
  .field select { font-size: var(--body); }
  .tariff-fields { grid-template-columns: 1fr; }
  .tariff-fields .field label { min-height: auto; }
  .form-actions .btn { flex: 1 1 auto; }
  .result-big { font-size: 40px; }
  .content-area { padding-bottom: 48px; }
  .article-wide { padding-block: 0 48px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}