:root {
  color: #f3fbfc;
  background: #071116;
  font-family: Inter, "Noto Sans SC", "Noto Sans", system-ui, sans-serif;
  font-synthesis: none;
  letter-spacing: 0;
  --background: #071116;
  --surface: #0e1c22;
  --surface-raised: #14262d;
  --text: #f3fbfc;
  --muted: #9cb0b5;
  --primary: #4fe5d2;
  --success: #56d18b;
  --line: #294048;
}

* { box-sizing: border-box; letter-spacing: 0; }
html { background: var(--background); scroll-behavior: smooth; }
body { margin: 0; min-width: 320px; color: var(--text); background: var(--background); }
a { color: inherit; }
button { font: inherit; }

.support-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 76px;
  padding: 0 max(24px, calc((100vw - 1120px) / 2));
  background: rgba(7, 17, 22, 0.96);
  border-bottom: 1px solid var(--line);
}

.brand { display: inline-flex; align-items: center; gap: 11px; text-decoration: none; }
.brand img { width: 40px; height: 40px; }
.brand span { display: grid; }
.brand strong { font-size: 14px; }
.brand small { margin-top: 2px; color: var(--muted); font-size: 11px; }
.language-switch { display: inline-flex; border: 1px solid var(--line); border-radius: 5px; overflow: hidden; }
.language-switch button { min-height: 38px; padding: 0 13px; color: var(--muted); background: transparent; border: 0; cursor: pointer; }
.language-switch button + button { border-left: 1px solid var(--line); }
.language-switch button.active { color: #071116; background: var(--primary); }
.language-switch button:focus-visible, a:focus-visible, summary:focus-visible { outline: 3px solid var(--primary); outline-offset: 3px; }

main, footer { width: min(1120px, calc(100% - 48px)); margin: 0 auto; }
.support-hero { max-width: 850px; padding: 96px 0 82px; }
.eyebrow { color: var(--primary); font-size: 12px; font-weight: 800; }
h1, h2, p { margin-top: 0; }
h1 { max-width: 760px; margin: 20px 0 24px; font-size: 54px; line-height: 1.08; }
.support-hero > p { max-width: 720px; color: var(--muted); font-size: 18px; line-height: 1.7; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 34px; }
.hero-actions a, .contact-band > a { display: inline-flex; align-items: center; justify-content: center; min-height: 46px; padding: 0 18px; border: 1px solid var(--line); border-radius: 5px; font-size: 14px; font-weight: 750; text-decoration: none; }
.hero-actions .primary, .contact-band .primary { color: #071116; background: var(--primary); border-color: var(--primary); }

.support-layout { display: grid; grid-template-columns: minmax(220px, 0.65fr) minmax(0, 1.35fr); gap: 80px; padding: 80px 0; border-top: 1px solid var(--line); }
.section-heading h2 { margin-top: 14px; font-size: 34px; }
.topic-list { border-top: 1px solid var(--line); }
details { border-bottom: 1px solid var(--line); }
summary { padding: 24px 42px 24px 0; font-size: 17px; font-weight: 750; line-height: 1.45; cursor: pointer; }
details p { max-width: 720px; padding: 0 32px 24px 0; color: var(--muted); font-size: 14px; line-height: 1.75; }

.contact-band { display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: center; gap: 42px; margin: 50px auto 80px; padding: 42px; background: var(--surface); border: 1px solid var(--line); border-left: 3px solid var(--success); border-radius: 6px; }
.contact-band h2 { max-width: 700px; margin: 13px 0 12px; font-size: 28px; line-height: 1.25; }
.contact-band p { margin-bottom: 0; color: var(--muted); line-height: 1.65; }
footer { display: flex; justify-content: space-between; padding: 30px 0 54px; color: var(--muted); border-top: 1px solid var(--line); font-size: 12px; }
footer a { text-decoration: none; }

@media (max-width: 767px) {
  .support-header { min-height: 68px; padding-inline: 18px; }
  .brand img { width: 34px; height: 34px; }
  .brand small { display: none; }
  .language-switch button { min-height: 36px; padding-inline: 9px; font-size: 12px; }
  main, footer { width: min(100% - 36px, 620px); }
  .support-hero { padding: 54px 0 52px; }
  h1 { font-size: 35px; overflow-wrap: anywhere; }
  .support-hero > p { font-size: 15px; }
  .hero-actions { align-items: stretch; flex-direction: column; }
  .support-layout { grid-template-columns: 1fr; gap: 30px; padding: 54px 0; }
  .section-heading h2 { font-size: 28px; }
  summary { font-size: 15px; }
  .contact-band { grid-template-columns: 1fr; gap: 24px; margin-block: 24px 54px; padding: 26px 22px; }
  .contact-band h2 { font-size: 23px; }
  .contact-band > a { width: 100%; overflow-wrap: anywhere; }
}