:root {
  color-scheme: dark;
  --bg: #101224;
  --panel: rgba(22, 33, 62, 0.92);
  --panel-strong: #16213e;
  --text: #f0eef6;
  --muted: #a8a0c2;
  --subtle: #6b6488;
  --accent: #9b7fd4;
  --accent-strong: #d4b8ff;
  --border: rgba(155, 127, 212, 0.18);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top, rgba(155, 127, 212, 0.18), transparent 32%),
    linear-gradient(180deg, #1a1a2e 0%, #101224 100%);
}

a {
  color: inherit;
  text-decoration: none;
}

.page {
  max-width: 980px;
  margin: 0 auto;
  padding: 24px 20px 64px;
}

.shell {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 28px;
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.35);
  overflow: hidden;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 24px;
  border-bottom: 1px solid var(--border);
  background: rgba(10, 12, 24, 0.28);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 800;
  letter-spacing: 0.02em;
}

.brand-badge {
  width: 42px;
  height: 42px;
  border-radius: 14px;
  object-fit: cover;
  box-shadow: 0 6px 18px rgba(83, 52, 131, 0.45);
}

.actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.pill,
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 42px;
  padding: 0 16px;
  border-radius: 999px;
  border: 1px solid var(--border);
  transition: transform 160ms ease, border-color 160ms ease, background-color 160ms ease;
}

.pill:hover,
.button:hover {
  transform: translateY(-1px);
  border-color: rgba(155, 127, 212, 0.4);
}

.button.primary {
  background: linear-gradient(135deg, #533483 0%, #9b7fd4 100%);
  color: white;
  border-color: transparent;
  box-shadow: 0 10px 28px rgba(155, 127, 212, 0.22);
}

.button.secondary {
  background: rgba(83, 52, 131, 0.16);
  color: var(--text);
}

.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: rgba(83, 52, 131, 0.14);
}

.lang-switch button {
  appearance: none;
  border: 0;
  background: transparent;
  color: var(--muted);
  font: inherit;
  font-weight: 700;
  letter-spacing: 0.04em;
  min-height: 34px;
  min-width: 52px;
  border-radius: 999px;
  cursor: pointer;
  transition: background-color 160ms ease, color 160ms ease, transform 160ms ease;
}

.lang-switch button:hover {
  transform: translateY(-1px);
}

.lang-switch button.is-active {
  background: linear-gradient(135deg, #533483 0%, #9b7fd4 100%);
  color: white;
  box-shadow: 0 8px 24px rgba(155, 127, 212, 0.18);
}

.hero {
  padding: 42px 24px 24px;
  border-bottom: 1px solid var(--border);
}

.eyebrow {
  display: inline-flex;
  margin-bottom: 14px;
  padding: 8px 14px;
  border-radius: 999px;
  background: rgba(83, 52, 131, 0.22);
  border: 1px solid rgba(155, 127, 212, 0.3);
  color: var(--accent);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1 {
  margin: 0 0 14px;
  font-size: clamp(2rem, 4vw, 3.5rem);
  line-height: 1.05;
}

.lead {
  max-width: 72ch;
  margin: 0;
  color: var(--muted);
  font-size: 1.04rem;
  line-height: 1.7;
}

.content {
  padding: 24px;
  display: grid;
  gap: 18px;
}

.content.two-columns {
  grid-template-columns: 1.3fr 0.9fr;
}

.card {
  background: rgba(13, 16, 30, 0.42);
  border: 1px solid var(--border);
  border-radius: 22px;
  padding: 22px;
}

.card h2,
.card h3 {
  margin: 0 0 10px;
  color: var(--accent-strong);
}

.card p,
.card li {
  color: var(--muted);
  line-height: 1.75;
}

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

.steps {
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}

.steps li {
  display: grid;
  grid-template-columns: 40px 1fr;
  gap: 14px;
  align-items: start;
}

.step-number {
  width: 40px;
  height: 40px;
  border-radius: 14px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: rgba(83, 52, 131, 0.28);
  border: 1px solid rgba(155, 127, 212, 0.2);
  color: var(--accent-strong);
  font-weight: 800;
}

.step-copy strong {
  color: var(--text);
}

.note-list {
  margin: 0;
  padding-left: 18px;
}

.note-list li + li {
  margin-top: 8px;
}

.stack {
  display: grid;
  gap: 18px;
}

[data-lang-panel] {
  display: none;
}

[data-lang-panel].is-visible {
  display: contents;
}

.meta {
  color: var(--subtle);
  font-size: 0.92rem;
}

.footer {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: space-between;
  align-items: center;
  padding: 20px 24px 24px;
  border-top: 1px solid var(--border);
  color: var(--subtle);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 18px;
}

.footer-links a {
  color: var(--muted);
}

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

@media (max-width: 640px) {
  .page {
    padding: 14px 12px 28px;
  }

  .topbar,
  .hero,
  .content,
  .footer {
    padding-left: 16px;
    padding-right: 16px;
  }

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

@media (max-width: 900px) {
  .content.two-columns {
    grid-template-columns: 1fr;
  }
}