:root {
  color-scheme: light;
  --bg: #f5f7fb;
  --panel: #ffffff;
  --ink: #172033;
  --muted: #5d6980;
  --line: #dce3ee;
  --accent: #1f7a8c;
  --accent-strong: #145c6b;
  --warning: #8a5a00;
  --warning-bg: #fff4d8;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: Arial, Helvetica, sans-serif;
  line-height: 1.55;
}

a {
  color: var(--accent-strong);
}

.shell {
  min-height: 100vh;
  display: grid;
  grid-template-rows: auto 1fr auto;
}

.topbar {
  background: var(--panel);
  border-bottom: 1px solid var(--line);
}

.topbar-inner,
.content,
.footer-inner {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
}

.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 18px 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
}

.mark {
  display: inline-grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: 8px;
  background: var(--accent);
  color: #ffffff;
  font-size: 14px;
  letter-spacing: 0;
}

.nav {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 14px;
  font-size: 14px;
}

.nav a {
  text-decoration: none;
}

.topbar-actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 18px;
}

.language-switch {
  display: inline-flex;
  align-items: center;
  gap: 2px;
  padding: 4px;
  border: 1px solid var(--accent);
  border-radius: 8px;
  background: #e8f5f7;
  box-shadow: 0 6px 18px rgba(20, 92, 107, 0.12);
}

.language-button {
  min-width: 78px;
  min-height: 34px;
  border: 0;
  border-radius: 6px;
  background: transparent;
  color: var(--accent-strong);
  cursor: pointer;
  font: inherit;
  font-size: 14px;
  font-weight: 700;
}

.language-button[aria-pressed="true"] {
  background: var(--accent);
  color: #ffffff;
}

.language-button:focus-visible {
  outline: 3px solid #f6c85f;
  outline-offset: 2px;
}

html[data-lang="ru"] .lang-en,
html[data-lang="en"] .lang-ru {
  display: none;
}

.content {
  padding: 44px 0 56px;
}

.page-title {
  max-width: 760px;
  margin: 0 0 22px;
  font-size: clamp(30px, 4vw, 48px);
  line-height: 1.08;
}

.lead {
  max-width: 780px;
  margin: 0 0 28px;
  color: var(--muted);
  font-size: 18px;
}

.notice {
  max-width: 880px;
  padding: 14px 16px;
  border: 1px solid #ecd18f;
  border-radius: 8px;
  background: var(--warning-bg);
  color: var(--warning);
  font-size: 14px;
}

.section-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin-top: 28px;
  min-width: 0;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 22px;
  min-width: 0;
}

.panel h2 {
  margin: 0 0 12px;
  font-size: 21px;
  line-height: 1.2;
}

.panel h3 {
  margin: 20px 0 10px;
  font-size: 17px;
}

.panel p,
.panel ul,
.panel ol {
  margin: 0 0 14px;
}

.panel li + li {
  margin-top: 6px;
}

.capability-table-wrap {
  overflow-x: auto;
  max-width: 100%;
  min-width: 0;
}

.capability-table {
  width: 100%;
  min-width: 720px;
  border-collapse: collapse;
  font-size: 14px;
}

.capability-table th,
.capability-table td {
  padding: 11px 12px;
  border: 1px solid var(--line);
  vertical-align: top;
  text-align: left;
}

.capability-table th {
  background: #edf5f7;
  color: var(--accent-strong);
  font-weight: 700;
}

.capability-table code {
  display: inline-block;
  margin: 0 3px 4px 0;
  padding: 2px 6px;
  border-radius: 6px;
  background: #eef2f7;
  color: #273247;
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 12px;
  white-space: nowrap;
}

.wide {
  grid-column: 1 / -1;
  min-width: 0;
}

.footer {
  border-top: 1px solid var(--line);
  background: var(--panel);
  color: var(--muted);
  font-size: 13px;
}

.footer-inner {
  padding: 18px 0;
}

@media (max-width: 760px) {
  .topbar-inner {
    align-items: flex-start;
    flex-direction: column;
  }

  .topbar-actions {
    align-items: flex-start;
    flex-direction: column;
    justify-content: flex-start;
  }

  .section-grid {
    grid-template-columns: 1fr;
  }
}