/* =========================================================
   50Hz to 60Hz — "Rating Plate" design system
   Replaces the old skel/html5up theme. No JS dependency for
   layout — real CSS media queries throughout.
   ========================================================= */

:root {
  --bg:          oklch(0.97 0.004 250);
  --bg-raised:   oklch(1 0 0);
  --ink:         oklch(0.16 0.006 250);
  --ink-soft:    oklch(0.42 0.006 250);
  --label:       oklch(0.5 0.006 250);
  --rule:        oklch(0.88 0.006 250);
  --rule-strong: oklch(0.16 0.006 250);
  --hover-bg:    oklch(0.93 0.005 250);
  --rivet:       oklch(0.72 0.01 250);
  --accent:      oklch(0.58 0.16 75);
  --accent-ink:  oklch(0.32 0.13 70);
  --accent-soft: oklch(0.94 0.03 75);
  --focus:       oklch(0.58 0.16 250);

  --font-display: 'Big Shoulders Display', 'Archivo Black', sans-serif;
  --font-body:    'Archivo', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --font-mono:    'IBM Plex Mono', ui-monospace, 'SFMono-Regular', Menlo, monospace;

  --wrap: 1120px;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: var(--accent-ink); text-decoration-color: var(--accent); text-underline-offset: 2px; }
a:hover { color: var(--ink); }
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible {
  outline: 2px solid var(--focus); outline-offset: 2px;
}
h1, h2, h3, h4 { font-family: var(--font-display); font-weight: 700; margin: 0; text-wrap: balance; }
p { margin: 0 0 16px; }
hr { border: none; border-top: 1px solid var(--rule); margin: 32px 0; }
hr.major { border-top: 2px solid var(--rule-strong); }

.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 32px; }

/* ---------- Nav ---------- */
.site-header {
  border-bottom: 2px solid var(--rule-strong);
  background: var(--bg);
  position: sticky; top: 0; z-index: 50;
}
.site-header .wrap {
  display: flex; align-items: center; justify-content: space-between;
  padding-top: 16px; padding-bottom: 16px;
}
.wordmark {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 22px;
  letter-spacing: 0.01em;
  color: var(--ink);
  display: inline-flex; align-items: center; gap: 8px;
  text-decoration: none;
  white-space: nowrap;
}
.wordmark .arrow { color: var(--accent); font-weight: 700; }
.wordmark .to { color: var(--accent); }
.wordmark:hover { color: var(--ink); }

nav.primary-nav ul {
  list-style: none; margin: 0; padding: 0;
  display: flex; gap: 28px;
  font-size: 13px; font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.03em;
}
nav.primary-nav a { color: var(--ink-soft); text-decoration: none; }
nav.primary-nav a:hover, nav.primary-nav a.current { color: var(--ink); }

.nav-toggle {
  display: none;
  background: none; border: 2px solid var(--rule-strong); border-radius: 3px;
  padding: 8px 10px; cursor: pointer;
}
.nav-toggle svg { display: block; width: 18px; height: 18px; }

@media (max-width: 860px) {
  nav.primary-nav {
    display: none;
    position: absolute; left: 0; right: 0; top: 100%;
    background: var(--bg); border-bottom: 2px solid var(--rule-strong);
    padding: 8px 0;
  }
  nav.primary-nav.open { display: block; }
  nav.primary-nav ul { flex-direction: column; gap: 0; }
  nav.primary-nav a { display: block; padding: 14px 32px; border-top: 1px solid var(--rule); }
  .nav-toggle { display: inline-flex; align-items: center; justify-content: center; }
}

/* ---------- Hero ---------- */
.hero { padding: 56px 0 44px; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.04em;
  color: var(--ink-soft); border: 1px solid var(--rule); border-radius: 2px;
  padding: 5px 10px; margin-bottom: 22px;
}
.eyebrow .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--accent); flex-shrink: 0; }
.hero h1 { font-size: 42px; line-height: 1.12; margin-bottom: 18px; }
.hero .lede { font-size: 17px; line-height: 1.6; color: var(--ink-soft); max-width: 62ch; }
@media (max-width: 640px) {
  .hero h1 { font-size: 32px; }
}

/* page header used on interior pages (not homepage) */
.page-head { padding: 44px 0 8px; }
.page-head .kicker { font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.05em; color: var(--ink-soft); margin-bottom: 10px; text-transform: uppercase; }
.page-head h1 { font-size: 34px; line-height: 1.16; margin-bottom: 10px; }
.page-head .lede { font-size: 16px; color: var(--ink-soft); max-width: 62ch; }
@media (max-width: 640px) {
  .page-head h1 { font-size: 27px; }
}

/* ---------- Layout: main content + sidebar ---------- */
.layout {
  display: grid; grid-template-columns: 1fr 260px; gap: 40px;
  padding: 8px 0 64px;
  align-items: start;
}
.layout.wide { grid-template-columns: 1fr; }
@media (max-width: 860px) {
  .layout { grid-template-columns: 1fr; }
}

.prose h2 { font-size: 24px; margin: 40px 0 16px; }
.prose h2:first-child { margin-top: 0; }
.prose h3 { font-size: 19px; margin: 28px 0 12px; }
.prose p, .prose li { font-size: 15.5px; line-height: 1.7; color: var(--ink-soft); }
.prose strong { color: var(--ink); }
.prose ul, .prose ol { padding-left: 22px; }
.prose blockquote {
  margin: 28px 0; padding: 4px 0 4px 20px; border-left: 3px solid var(--accent);
  font-family: var(--font-display); font-weight: 600; font-size: 20px; line-height: 1.4;
  color: var(--ink);
}

/* ---------- Sidebar ---------- */
.sidebar { display: flex; flex-direction: column; gap: 28px; }
.sidebar-block .side-label {
  font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--label); margin-bottom: 12px;
}
.sidebar-block ul { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 10px; }
.sidebar-block a { font-size: 14px; color: var(--ink); text-decoration: none; font-weight: 500; }
.sidebar-block a:hover { color: var(--accent-ink); }

/* ---------- Plate (the repeating stat-card component) ---------- */
.plate {
  background: var(--bg-raised);
  border: 1.5px solid var(--rule-strong);
  border-radius: 3px;
  padding: 28px 30px;
  position: relative;
}
.plate::before, .plate::after {
  content: ''; position: absolute; width: 6px; height: 6px; border-radius: 50%;
  background: var(--rivet); top: 12px;
}
.plate::before { left: 12px; }
.plate::after { right: 12px; }
.plate-label {
  font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--label); margin-bottom: 18px;
}
.stat-row {
  display: flex; align-items: baseline; gap: 20px;
  padding: 13px 0; border-bottom: 1px solid var(--rule);
}
.stat-row:last-of-type { border-bottom: none; }
.stat-tag { font-family: var(--font-mono); font-size: 12px; color: var(--label); width: 92px; flex-shrink: 0; }
.stat-value { font-family: var(--font-display); font-weight: 700; font-size: 34px; color: var(--ink); }
.stat-value.accent { color: var(--accent-ink); }
.plate-note { font-size: 14.5px; line-height: 1.6; color: var(--ink-soft); margin: 18px 0 4px; }
.plate .cta { font-size: 13px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.03em; color: var(--ink); text-decoration: none; border-bottom: 2px solid var(--accent); display: inline-block; margin-top: 12px; }
.plate .cta:hover { color: var(--accent-ink); }

/* Compact inline stat pair, used in headers */
.stat-pair { display: flex; align-items: baseline; gap: 14px; font-family: var(--font-display); font-weight: 700; }
.stat-pair .sep { font-family: var(--font-body); font-weight: 400; color: var(--ink-soft); font-size: 0.6em; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 13px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.03em;
  padding: 12px 20px; border-radius: 3px; text-decoration: none; border: 1.5px solid transparent;
  cursor: pointer;
}
/* .btn.btn-primary (two classes) intentionally outranks selectors like
   ".sidebar-block a" (one class + one element) that would otherwise win
   on specificity and silently override the button's text color. */
.btn.btn-primary { background: var(--ink); color: var(--bg); }
.btn.btn-primary:hover { background: var(--accent-ink); color: white; }
.btn.btn-outline { border-color: var(--rule-strong); color: var(--ink); background: transparent; }
.btn.btn-outline:hover { border-color: var(--accent); color: var(--accent-ink); }

/* ---------- Cards (generic content card, e.g. topic blocks) ---------- */
.card { border: 1px solid var(--rule); border-radius: 3px; padding: 24px 26px; background: var(--bg-raised); }
.card h3 { font-size: 18px; margin-bottom: 10px; }

/* ---------- Country index / A-Z table ---------- */
.index-strip {
  display: flex; flex-wrap: wrap; font-family: var(--font-mono); font-size: 13px;
  border-top: 1px solid var(--rule); border-bottom: 1px solid var(--rule);
  margin: 28px 0 36px;
}
.index-strip a {
  padding: 9px 13px; color: var(--label); text-decoration: none; border-right: 1px solid var(--rule);
}
.index-strip a:hover { color: var(--accent-ink); }

.country-group h2 {
  font-family: var(--font-mono); font-size: 15px; font-weight: 700; letter-spacing: 0.04em;
  color: var(--ink); margin: 36px 0 4px; padding-bottom: 6px; border-bottom: 2px solid var(--rule-strong);
}
.country-list { list-style: none; margin: 0; padding: 0; }
.country-list li { border-bottom: 1px solid var(--rule); font-size: 14.5px; }
.country-list li:last-child { border-bottom: none; }
.country-list a {
  display: flex; align-items: baseline; justify-content: space-between; gap: 16px;
  padding: 10px 8px; margin: 0 -8px;
  color: var(--ink); text-decoration: none; font-weight: 500;
  border-radius: 2px;
}
.country-list a:hover { background: var(--hover-bg); color: var(--accent-ink); }
.country-list .cv { font-family: var(--font-mono); font-size: 13px; color: var(--label); white-space: nowrap; }

/* Homepage lookup table (kept as a real <table>, restyled) */
.rate-table-wrap { overflow-x: auto; margin: 28px 0; border: 1px solid var(--rule); border-radius: 3px; }
table.rate-table { width: 100%; border-collapse: collapse; font-size: 14px; }
table.rate-table caption { text-align: left; padding: 14px 18px; font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.05em; text-transform: uppercase; color: var(--label); border-bottom: 1px solid var(--rule); }
table.rate-table th {
  text-align: left; font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.06em; text-transform: uppercase;
  color: var(--label); padding: 10px 18px; border-bottom: 2px solid var(--rule-strong); background: var(--bg);
  position: sticky; top: 65px;
}
table.rate-table td { padding: 10px 18px; border-bottom: 1px solid var(--rule); font-variant-numeric: tabular-nums; }
table.rate-table td:first-child a { color: var(--ink); text-decoration: none; font-weight: 500; }
table.rate-table td:first-child a:hover { color: var(--accent-ink); }
table.rate-table tr:hover td { background: var(--accent-soft); }
.letter-tabs { display: flex; flex-wrap: wrap; gap: 6px; margin: 20px 0; }
.letter-tabs button {
  font-family: var(--font-mono); font-size: 12px; padding: 7px 12px; border: 1px solid var(--rule);
  background: var(--bg-raised); color: var(--ink-soft); border-radius: 2px; cursor: pointer;
}
.letter-tabs button.active { background: var(--ink); color: var(--bg); border-color: var(--ink); }

/* ---------- Q&A blocks (FAQ / converter pages) ---------- */
.qa-block {
  border: 1px solid var(--rule); border-radius: 3px; padding: 22px 24px; margin-bottom: 18px;
  background: var(--bg-raised);
}
.qa-block h4 { font-size: 16px; margin-bottom: 12px; }
.qa-block .q, .qa-block .a { display: flex; gap: 12px; font-size: 14.5px; line-height: 1.65; color: var(--ink-soft); }
.qa-block .a { margin-top: 14px; padding-top: 14px; border-top: 1px dashed var(--rule); color: var(--ink); }
.qa-block .tag { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.05em; color: var(--accent-ink); background: var(--accent-soft); border-radius: 2px; padding: 3px 7px; flex-shrink: 0; height: fit-content; }

.crumb-nav {
  display: flex; justify-content: space-between; gap: 12px; font-size: 13px; color: var(--label);
  padding: 12px 0; border-top: 1px solid var(--rule); border-bottom: 1px solid var(--rule); margin-bottom: 28px;
}
.crumb-nav a { color: var(--ink-soft); text-decoration: none; }
.crumb-nav a:hover { color: var(--accent-ink); }

/* ---------- Category tiles (FAQ hub) ---------- */
.tile-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin: 24px 0 8px; }
@media (max-width: 700px) { .tile-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 460px) { .tile-grid { grid-template-columns: 1fr; } }
.tile { border: 1px solid var(--rule); border-radius: 3px; padding: 20px; background: var(--bg-raised); text-decoration: none; display: block; }
.tile:hover { border-color: var(--accent); }
.tile .name { font-family: var(--font-display); font-weight: 700; font-size: 17px; color: var(--ink); margin-bottom: 6px; }
.tile .desc { font-size: 13.5px; color: var(--ink-soft); line-height: 1.5; }

/* ---------- Forms (contact page) ---------- */
.form-group { margin-bottom: 18px; }
.form-group label { display: block; font-size: 13px; font-weight: 600; margin-bottom: 6px; color: var(--ink); }
.form-control {
  width: 100%; font-family: var(--font-body); font-size: 15px; padding: 12px 14px;
  border: 1.5px solid var(--rule); border-radius: 3px; background: var(--bg-raised); color: var(--ink);
}
.form-control:focus { border-color: var(--accent); outline: none; }
textarea.form-control { resize: vertical; }
.has-error .form-control { border-color: oklch(0.55 0.18 25); }
.help-block.with-errors { font-size: 12.5px; color: oklch(0.5 0.18 25); margin-top: 5px; min-height: 0; }
.btn-send { border: none; }
.text-muted { font-size: 12.5px; color: var(--label); margin-top: 6px; }
.alert { padding: 12px 16px; border-radius: 3px; font-size: 14px; margin-bottom: 18px; position: relative; }
.alert-success { background: oklch(0.94 0.05 150); color: oklch(0.32 0.1 150); }
.alert-danger { background: oklch(0.94 0.05 25); color: oklch(0.4 0.15 25); }
.alert .close { position: absolute; right: 10px; top: 8px; background: none; border: none; font-size: 16px; cursor: pointer; color: inherit; }

/* ---------- Footer ---------- */
.site-footer { border-top: 2px solid var(--rule-strong); margin-top: 40px; padding: 28px 0; }
.site-footer .wrap { display: flex; flex-wrap: wrap; gap: 10px 24px; align-items: center; justify-content: space-between; }
.site-footer ul { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 20px; }
.site-footer a { color: var(--ink-soft); text-decoration: none; font-size: 13px; }
.site-footer a:hover { color: var(--ink); }
.site-footer .copy { font-size: 13px; color: var(--label); }

/* ---------- Figures ---------- */
.figure { border: 1px solid var(--rule); border-radius: 3px; overflow: hidden; margin: 24px 0; background: var(--bg-raised); }
.figure img { width: 100%; display: block; }
.figure figcaption { padding: 10px 16px; font-family: var(--font-mono); font-size: 12px; color: var(--label); border-top: 1px solid var(--rule); }

/* ---------- Misc ---------- */
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; }
@media (max-width: 700px) { .two-col { grid-template-columns: 1fr; } }
.related-articles { display: flex; flex-direction: column; gap: 4px; margin: 8px 0 0; }