:root {
  --bg: #f5f5f7;
  --surface: #ffffff;
  --text: #1d1d1f;
  --muted: #6e6e73;
  --accent: #0071e3;
  --accent-hover: #0077ed;
  --border: rgba(0, 0, 0, 0.08);
  --radius: 14px;
  --shadow: 0 12px 40px rgba(0, 0, 0, 0.08);
  --max: 920px;
  --font: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #000000;
    --surface: #1c1c1e;
    --text: #f5f5f7;
    --muted: #a1a1a6;
    --border: rgba(255, 255, 255, 0.12);
    --shadow: 0 12px 40px rgba(0, 0, 0, 0.45);
  }
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

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

a:hover {
  text-decoration: underline;
}

.wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 24px 80px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(16px);
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  border-bottom: 1px solid var(--border);
}

.site-header .inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  font-size: 1.05rem;
  color: var(--text);
  text-decoration: none;
}

.brand:hover {
  text-decoration: none;
}

.brand-mark {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: linear-gradient(145deg, #5ac8fa, #0071e3 55%, #5856d6);
  box-shadow: 0 4px 14px rgba(0, 113, 227, 0.35);
}

nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  font-size: 0.92rem;
}

nav a {
  color: var(--muted);
}

nav a[aria-current="page"] {
  color: var(--text);
  font-weight: 600;
}

.hero {
  padding: 56px 0 40px;
  text-align: center;
}

.hero h1 {
  margin: 0 0 12px;
  font-size: clamp(2rem, 5vw, 2.75rem);
  letter-spacing: -0.03em;
  line-height: 1.1;
}

.hero .lead {
  margin: 0 auto;
  max-width: 36em;
  font-size: 1.15rem;
  color: var(--muted);
}

.pill-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin-top: 28px;
}

.pill {
  padding: 6px 14px;
  border-radius: 999px;
  background: var(--surface);
  border: 1px solid var(--border);
  font-size: 0.85rem;
  color: var(--muted);
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 28px 32px;
  margin-bottom: 24px;
}

.card h2 {
  margin: 0 0 16px;
  font-size: 1.35rem;
  letter-spacing: -0.02em;
}

.card h3 {
  margin: 24px 0 10px;
  font-size: 1.05rem;
}

.compare {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
}

.compare th,
.compare td {
  text-align: left;
  padding: 12px 14px;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}

.compare th {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--muted);
}

.compare tr:last-child td {
  border-bottom: none;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
}

.feature {
  padding: 18px 20px;
  border-radius: 12px;
  background: color-mix(in srgb, var(--accent) 6%, var(--surface));
  border: 1px solid var(--border);
}

.feature strong {
  display: block;
  margin-bottom: 6px;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  margin-top: 32px;
}

.btn {
  display: inline-block;
  padding: 12px 22px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  border: none;
  cursor: pointer;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
}

.btn-primary:hover {
  background: var(--accent-hover);
  text-decoration: none;
  color: #fff;
}

.btn-secondary {
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  text-decoration: none;
}

.prose h2 {
  margin-top: 2em;
  font-size: 1.25rem;
}

.prose ul {
  padding-left: 1.25em;
}

.prose li {
  margin: 0.35em 0;
}

.site-footer {
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  text-align: center;
  font-size: 0.88rem;
  color: var(--muted);
}

.lang-switch {
  font-size: 0.85rem;
}

.lang-switch a {
  color: var(--muted);
  margin-left: 10px;
}

.lang-switch a.active {
  color: var(--text);
  font-weight: 600;
}

kbd {
  display: inline-block;
  padding: 2px 7px;
  border-radius: 6px;
  font-size: 0.82em;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  background: var(--surface);
  border: 1px solid var(--border);
  box-shadow: 0 1px 0 var(--border);
}