:root {
  --bg: #f6f7f9;
  --surface: #ffffff;
  --ink: #16202a;
  --muted: #67727e;
  --line: #dfe4e8;
  --accent: #0b6bcb;
  --accent-dark: #084f97;
  --soft: #eaf3fd;
  --radius: 18px;
  --shadow: 0 14px 40px rgba(25, 39, 52, .08);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; color: var(--ink); background: var(--bg); line-height: 1.6; }
a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-dark); }
.container { width: min(1160px, calc(100% - 32px)); margin: 0 auto; }
.narrow { max-width: 780px; }
.site-header { position: sticky; top: 0; z-index: 20; background: rgba(255,255,255,.94); backdrop-filter: blur(12px); border-bottom: 1px solid var(--line); }
.nav-wrap { min-height: 68px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { font-weight: 850; letter-spacing: -.03em; color: var(--ink); font-size: 1.2rem; }
.nav-links { display: flex; align-items: center; gap: 22px; font-weight: 650; }
.lang-switch { border: 1px solid var(--line); padding: 6px 10px; border-radius: 10px; }
.hero { padding: 88px 0 70px; background: linear-gradient(145deg, #f8fbff 0%, #edf4fb 60%, #f6f7f9 100%); }
.hero-grid { display: grid; grid-template-columns: 1.4fr .6fr; align-items: center; gap: 64px; }
.hero h1, .page-header h1 { margin: 12px 0 18px; font-size: clamp(2.4rem, 6vw, 5rem); line-height: 1.02; letter-spacing: -.055em; }
.hero-copy, .page-header p { font-size: 1.12rem; color: var(--muted); max-width: 760px; }
.eyebrow { color: var(--accent); text-transform: uppercase; letter-spacing: .12em; font-size: .76rem; font-weight: 800; }
.hero-panel { background: var(--surface); border: 1px solid var(--line); box-shadow: var(--shadow); border-radius: 28px; padding: 30px; }
.hero-panel hr { border: 0; border-top: 1px solid var(--line); margin: 20px 0; }
.metric-big { font-size: 2.2rem; font-weight: 850; line-height: 1; }
.button-row { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.button { display: inline-flex; justify-content: center; align-items: center; min-height: 46px; padding: 0 20px; border-radius: 12px; border: 1px solid transparent; font-weight: 760; cursor: pointer; font: inherit; }
.button.primary { background: var(--accent); color: white; }
.button.primary:hover { background: var(--accent-dark); color: white; }
.button.secondary { background: var(--surface); border-color: var(--line); color: var(--ink); }
.button.full { width: 100%; }
.section { padding: 72px 0; }
.section.alt { background: #eef2f5; }
.section-heading { display: flex; align-items: end; justify-content: space-between; gap: 20px; margin-bottom: 28px; }
h2 { font-size: clamp(1.65rem, 4vw, 2.6rem); letter-spacing: -.035em; line-height: 1.15; margin: 8px 0; }
h3 { line-height: 1.25; }
.country-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.country-card, .tool-card { display: flex; flex-direction: column; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; color: var(--ink); transition: transform .18s ease, box-shadow .18s ease; }
.country-card:hover, .tool-card:hover { transform: translateY(-3px); box-shadow: var(--shadow); color: var(--ink); }
.country-card span:last-child { color: var(--muted); font-size: .9rem; }
.country-code { font-size: .75rem; color: var(--accent) !important; font-weight: 800; letter-spacing: .12em; }
.tool-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.tool-card p { color: var(--muted); flex: 1; }
.page-header { padding: 72px 0 50px; background: var(--surface); border-bottom: 1px solid var(--line); }
.page-header h1 { font-size: clamp(2.2rem, 5vw, 4.2rem); }
.text-link { display: inline-block; margin-top: 16px; font-weight: 750; }
.metric-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.metric-card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; }
.metric-card span { color: var(--muted); }
.metric-card strong { display: block; font-size: 1.75rem; letter-spacing: -.03em; margin: 8px 0 3px; }
.metric-card small { color: var(--accent); font-weight: 700; }
.chart-card { background: var(--surface); border: 1px solid var(--line); border-radius: 24px; padding: 26px; box-shadow: var(--shadow); }
.chart-toolbar { display: flex; align-items: center; justify-content: space-between; gap: 18px; margin-bottom: 18px; }
.chart-wrap { height: 420px; }
select, input { width: 100%; min-height: 46px; border: 1px solid var(--line); border-radius: 10px; padding: 0 12px; background: var(--surface); color: var(--ink); font: inherit; }
.compare-form { display: grid; grid-template-columns: 1fr 1fr 1.4fr auto; gap: 14px; align-items: end; margin-bottom: 24px; }
.compare-form label span, .field span { display: block; margin-bottom: 7px; font-weight: 700; font-size: .9rem; }
.compare-chart-card { margin-top: 20px; }
.data-table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); }
.data-table { width: 100%; border-collapse: collapse; min-width: 760px; }
.data-table th, .data-table td { text-align: left; padding: 16px; border-bottom: 1px solid var(--line); vertical-align: top; }
.data-table th { background: #f0f4f7; font-size: .84rem; text-transform: uppercase; letter-spacing: .05em; }
.calculator-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; align-items: start; max-width: 900px; }
.calculator-card, .result-card { background: var(--surface); border: 1px solid var(--line); border-radius: 24px; padding: 26px; box-shadow: var(--shadow); }
.field { display: block; margin-bottom: 18px; }
.result-value { font-size: clamp(2.2rem, 6vw, 4rem); font-weight: 850; letter-spacing: -.05em; margin: 16px 0; overflow-wrap: anywhere; }
.result-card p, .result-card small { color: var(--muted); }
.empty-state { min-height: 70vh; display: grid; place-items: center; text-align: center; }
.error-code { font-size: 5rem; font-weight: 900; color: var(--accent); }
.site-footer { border-top: 1px solid var(--line); background: var(--surface); padding: 42px 0; color: var(--muted); }
.footer-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; }
.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 (max-width: 900px) {
  .hero-grid, .calculator-layout { grid-template-columns: 1fr; }
  .country-grid { grid-template-columns: repeat(2, 1fr); }
  .tool-grid { grid-template-columns: repeat(2, 1fr); }
  .compare-form { grid-template-columns: 1fr 1fr; }
  .hero { padding-top: 60px; }
}
@media (max-width: 620px) {
  .nav-wrap { align-items: flex-start; padding: 14px 0; }
  .nav-links { gap: 10px; flex-wrap: wrap; justify-content: flex-end; font-size: .85rem; }
  .country-grid, .tool-grid, .metric-grid, .footer-grid, .compare-form { grid-template-columns: 1fr; }
  .section { padding: 50px 0; }
  .section-heading, .chart-toolbar { align-items: flex-start; flex-direction: column; }
  .chart-wrap { height: 320px; }
}