:root {
  color-scheme: dark;
  --bg: #071012;
  --bg-accent: radial-gradient(circle at top left, rgba(125, 231, 209, 0.18), transparent 32%), radial-gradient(circle at top right, rgba(58, 130, 246, 0.14), transparent 26%), #071012;
  --panel: rgba(12, 18, 21, 0.9);
  --panel-strong: rgba(15, 22, 26, 0.96);
  --border: rgba(138, 162, 171, 0.18);
  --text: #ecf4f5;
  --muted: #bfccd0;
  --accent: #7de7d1;
  --accent-strong: #99f0df;
  --accent-blue: #68a6ff;
  --shadow: 0 20px 48px rgba(0, 0, 0, 0.24);
  --max: 980px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  min-height: 100%;
  background: var(--bg-accent);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang SC", sans-serif;
  line-height: 1.7;
}

body {
  padding: 32px 20px 72px;
}

a {
  color: var(--accent);
  text-decoration: none;
}

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

.shell {
  width: min(100%, var(--max));
  margin: 0 auto;
}

.hero,
.panel,
.doc {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 24px;
  box-shadow: var(--shadow);
}

.hero {
  padding: 28px 26px;
  background: linear-gradient(180deg, rgba(16, 24, 28, 0.94), rgba(10, 15, 18, 0.96));
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(125, 231, 209, 0.1);
  border: 1px solid rgba(125, 231, 209, 0.16);
  color: var(--accent);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.hero h1,
.doc h1 {
  margin: 16px 0 10px;
  font-size: clamp(32px, 5vw, 52px);
  line-height: 1.05;
  letter-spacing: -0.03em;
}

.hero p,
.doc p,
.doc li {
  color: var(--muted);
  font-size: 16px;
}

.hero p + p,
.doc p + p {
  margin-top: 12px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin-top: 22px;
}

.panel {
  padding: 22px 20px;
}

.panel h2,
.doc h2 {
  margin: 0 0 10px;
  font-size: 24px;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.panel p {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 18px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 18px;
  border-radius: 999px;
  border: 1px solid rgba(125, 231, 209, 0.18);
  background: rgba(125, 231, 209, 0.1);
  color: var(--text);
  font-weight: 600;
}

.button.secondary {
  background: rgba(104, 166, 255, 0.1);
  border-color: rgba(104, 166, 255, 0.18);
}

.list {
  margin: 14px 0 0;
  padding-left: 20px;
}

.list li + li,
.doc li + li {
  margin-top: 10px;
}

.doc {
  padding: 28px 24px 30px;
  background: var(--panel-strong);
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 18px;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.nav a,
.lang-jump a {
  display: inline-flex;
  align-items: center;
  min-height: 38px;
  padding: 0 14px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.02);
  color: var(--muted);
  font-size: 14px;
  font-weight: 600;
}

.nav a.active,
.lang-jump a.active {
  border-color: rgba(125, 231, 209, 0.18);
  background: rgba(125, 231, 209, 0.1);
  color: var(--accent);
}

.lang-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.meta {
  margin: 0 0 18px;
  color: var(--accent);
  font-size: 13px;
  font-weight: 600;
}

.section-block + .section-block {
  margin-top: 34px;
  padding-top: 28px;
  border-top: 1px solid var(--border);
}

.doc ul {
  margin: 12px 0 0;
  padding-left: 20px;
}

.muted-card {
  margin-top: 18px;
  padding: 16px 18px;
  border-radius: 18px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.02);
}

.footer {
  margin-top: 22px;
  color: var(--muted);
  font-size: 13px;
}

@media (max-width: 760px) {
  body {
    padding: 18px 14px 56px;
  }

  .hero,
  .panel,
  .doc {
    border-radius: 20px;
  }

  .hero,
  .doc {
    padding: 22px 18px 24px;
  }

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

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