:root {
  color-scheme: light dark;
  --accent: #0a66d8;
  --accent-hover: #004fae;
  --accent-soft: #eaf3ff;
  --ink: #17191c;
  --muted: #5d626b;
  --canvas: #f7f8fa;
  --surface: #ffffff;
  --surface-soft: #f1f3f6;
  --line: #dfe2e7;
  --success: #207a4b;
  --warning: #9b5d00;
  --radius: 16px;
  --max: 1040px;
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  min-width: 280px;
  margin: 0;
  color: var(--ink);
  background: var(--canvas);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.62;
}

a {
  color: var(--accent);
  text-underline-offset: 0.18em;
}

a[href^="mailto:"] { overflow-wrap: anywhere; }
a:hover { text-decoration-thickness: 2px; }
a:focus-visible,
summary:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--accent) 38%, transparent);
  outline-offset: 3px;
  border-radius: 6px;
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 8px;
  left: 8px;
  padding: 9px 13px;
  color: #fff;
  background: #111;
  border-radius: 8px;
  transform: translateY(-150%);
}

.skip-link:focus { transform: translateY(0); }
.container { width: min(calc(100% - 40px), var(--max)); margin-inline: auto; }

.site-header {
  position: sticky;
  z-index: 20;
  top: 0;
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--canvas) 88%, transparent);
  backdrop-filter: blur(18px) saturate(140%);
  -webkit-backdrop-filter: blur(18px) saturate(140%);
}

.header-inner {
  min-height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-size: 17px;
  font-weight: 760;
  letter-spacing: -0.025em;
  text-decoration: none;
  white-space: nowrap;
}

.brand img { width: 34px; height: 34px; }
.site-nav { display: flex; align-items: center; gap: 2px; }

.site-nav a {
  min-height: 40px;
  display: inline-flex;
  align-items: center;
  padding: 7px 10px;
  border-radius: 9px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 650;
  text-decoration: none;
  white-space: nowrap;
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  color: var(--ink);
  background: var(--surface-soft);
}

.eyebrow {
  margin: 0 0 11px;
  color: var(--accent);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  line-height: 1.18;
  text-wrap: balance;
}

h1 {
  max-width: 760px;
  margin: 0;
  font-size: clamp(2.35rem, 6vw, 4rem);
  letter-spacing: -0.055em;
}

.button {
  min-height: 46px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  padding: 10px 17px;
  border: 1px solid transparent;
  border-radius: 10px;
  font-weight: 720;
  text-align: center;
  text-decoration: none;
}

.button-primary { color: #fff; background: var(--accent); }
.button-primary:hover { background: var(--accent-hover); }
.button-secondary { color: var(--ink); background: var(--surface); border-color: var(--line); }

.page-heading h1 { margin: 0; font-size: clamp(2rem, 5vw, 3rem); letter-spacing: -0.045em; }
.page-heading > p:not(.eyebrow):not(.meta) { color: var(--muted); font-size: 1.04rem; }

.card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.notice {
  padding: 20px 22px;
  border-left: 4px solid var(--accent);
  border-radius: 4px var(--radius) var(--radius) 4px;
  background: var(--accent-soft);
}

.notice strong { display: block; margin-bottom: 3px; }
.notice p { margin: 0; color: var(--muted); }
.notice-spaced { margin-top: 14px; }

.page-main { padding: 62px 0 82px; }
.page-heading { max-width: 760px; margin-bottom: 34px; }
.page-heading .meta { margin-top: 14px; color: var(--muted); font-size: 0.88rem; }

.contact-band {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 28px;
  align-items: center;
  margin-bottom: 30px;
  padding: 28px;
  border: 1px solid color-mix(in srgb, var(--accent) 25%, var(--line));
  border-radius: var(--radius);
  background: var(--surface);
}

.contact-band h2 { margin: 0 0 5px; font-size: 1.35rem; letter-spacing: -0.03em; }
.contact-band p { margin: 0; color: var(--muted); }
.contact-band .button { max-width: 330px; overflow-wrap: anywhere; }

.card-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.card { padding: 24px; }
.card h2,
.card h3 { margin: 0 0 10px; font-size: 1.12rem; letter-spacing: -0.025em; }
.card p { color: var(--muted); }
.card p:last-child,
.card ul:last-child { margin-bottom: 0; }
.card ul { padding-left: 1.2rem; color: var(--muted); }
.card li + li { margin-top: 6px; }

.subsection { margin-top: 48px; scroll-margin-top: 84px; }
.subsection-heading { max-width: 700px; margin-bottom: 18px; }
.subsection-heading h2 { margin: 0 0 7px; font-size: 1.75rem; letter-spacing: -0.04em; }
.subsection-heading p { margin: 0; color: var(--muted); }

.faq-list { display: grid; gap: 10px; }
details { border: 1px solid var(--line); border-radius: 12px; background: var(--surface); }
summary { cursor: pointer; padding: 17px 19px; color: var(--ink); font-weight: 700; }
details[open] summary { border-bottom: 1px solid var(--line); }
.answer { padding: 3px 19px 18px; color: var(--muted); }
.answer p:last-child,
.answer ul:last-child { margin-bottom: 0; }

.content-layout {
  display: grid;
  grid-template-columns: 218px minmax(0, 1fr);
  gap: 48px;
  align-items: start;
}

.toc {
  position: sticky;
  top: 88px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface);
}

.toc strong { display: block; margin-bottom: 7px; font-size: 0.83rem; }
.toc a { display: block; padding: 4px 0; color: var(--muted); font-size: 0.84rem; text-decoration: none; }
.toc a:hover { color: var(--accent); }

.legal { max-width: 760px; }
.legal section { scroll-margin-top: 92px; margin-bottom: 38px; }
.legal h2 { margin: 0 0 12px; font-size: 1.45rem; letter-spacing: -0.03em; }
.legal h3 { margin: 22px 0 7px; font-size: 1.04rem; }
.legal p,
.legal li { color: var(--muted); }
.legal li + li { margin-top: 7px; }
.legal .lead { color: var(--ink); font-size: 1.05rem; }

.summary-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-bottom: 36px;
}

.summary-item { padding: 19px; border: 1px solid var(--line); border-radius: 12px; background: var(--surface); }
.summary-item strong { display: block; margin-bottom: 3px; font-size: 0.94rem; }
.summary-item span { color: var(--muted); font-size: 0.86rem; }

.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: 12px; background: var(--surface); }
.table-spaced { margin-top: 14px; }
table { width: 100%; border-collapse: collapse; font-size: 0.91rem; }
th,
td { padding: 14px 16px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
tr:last-child td { border-bottom: 0; }
th { color: var(--ink); background: var(--surface-soft); font-size: 0.82rem; }
td { color: var(--muted); }
td:first-child { width: 26%; color: var(--ink); font-weight: 650; }

.status {
  display: inline-block;
  margin-bottom: 4px;
  padding: 2px 8px;
  border-radius: 999px;
  color: var(--success);
  background: color-mix(in srgb, var(--success) 11%, transparent);
  font-size: 0.74rem;
  font-weight: 760;
  white-space: nowrap;
}

.status-limited { color: var(--warning); background: color-mix(in srgb, var(--warning) 12%, transparent); }
.status-unsupported { color: var(--muted); background: var(--surface-soft); }

.site-footer { padding: 28px 0 40px; border-top: 1px solid var(--line); background: var(--surface); }
.footer-inner { display: flex; justify-content: space-between; gap: 22px; color: var(--muted); font-size: 13px; }
.footer-links { display: flex; flex-wrap: wrap; gap: 16px; }
.footer-links a { color: inherit; }
.muted { color: var(--muted); }

@media (max-width: 760px) {
  .container { width: min(calc(100% - 28px), var(--max)); }
  .header-inner { min-height: 60px; gap: 8px; }
  .brand span { display: none; }
  .brand img { width: 32px; height: 32px; }
  .site-nav { gap: 0; }
  .site-nav a { min-height: 38px; padding-inline: 7px; font-size: 12.5px; }
  .card-grid,
  .summary-grid { grid-template-columns: 1fr; }
  .page-main { padding: 46px 0 66px; }
  .content-layout { grid-template-columns: 1fr; gap: 28px; }
  .toc { position: static; }
  .contact-band { grid-template-columns: 1fr; gap: 18px; padding: 22px; }
  .contact-band .button { max-width: none; width: 100%; }
  .footer-inner { flex-direction: column; }
}

@media (max-width: 390px) {
  .site-nav a { padding-inline: 5px; font-size: 12px; }
  th,
  td { padding: 12px; }
}

@media (prefers-color-scheme: dark) {
  :root {
    --accent: #63adff;
    --accent-hover: #8bc2ff;
    --accent-soft: #10273e;
    --ink: #f3f4f6;
    --muted: #b5bac3;
    --canvas: #101113;
    --surface: #191b1f;
    --surface-soft: #23262b;
    --line: #32363d;
    --success: #66cc93;
    --warning: #f2b85b;
  }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}