:root {
  color-scheme: light dark;
  --bg: #ffffff;
  --bg-alt: #f6f7f9;
  --text: #16181d;
  --text-muted: #565c66;
  --border: #e4e6ea;
  --accent: #2ca5e0;
  --accent-dark: #1c86bb;
  --radius: 14px;
  --max-width: 880px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14161a;
    --bg-alt: #1b1e24;
    --text: #eceef1;
    --text-muted: #a2a8b3;
    --border: #2a2e36;
    --accent: #4fc0f2;
    --accent-dark: #7dd3f7;
  }
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family:
    -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial,
    sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.55;
}

.wrap {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

header.site {
  padding: 18px 0;
  border-bottom: 1px solid var(--border);
}

header.site .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 1.05rem;
  text-decoration: none;
  color: var(--text);
}

.brand-logo {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 1px solid var(--border);
}

.lang-switch a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.9rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 6px 14px;
}

.lang-switch a:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.hero {
  padding: 64px 0 48px;
  text-align: center;
}

.hero h1 {
  font-size: clamp(1.9rem, 4vw, 2.6rem);
  line-height: 1.2;
  margin: 0 0 18px;
  letter-spacing: -0.02em;
}

.hero p.lead {
  font-size: 1.15rem;
  color: var(--text-muted);
  max-width: 620px;
  margin: 0 auto 32px;
}

.cta {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--accent);
  color: #fff;
  font-weight: 600;
  font-size: 1.05rem;
  padding: 14px 28px;
  border-radius: 999px;
  text-decoration: none;
  transition: background 0.15s ease;
}

.cta:hover {
  background: var(--accent-dark);
}

.cta-secondary {
  display: block;
  margin-top: 14px;
  color: var(--text-muted);
  font-size: 0.9rem;
}

section.features {
  padding: 8px 0 56px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}

.card {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
}

.card .emoji {
  font-size: 1.6rem;
  display: block;
  margin-bottom: 10px;
}

.card h3 {
  margin: 0 0 8px;
  font-size: 1.05rem;
}

.card p {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.95rem;
}

section.faq {
  padding: 8px 0 56px;
  border-top: 1px solid var(--border);
}

section.faq h2 {
  font-size: 1.4rem;
  margin: 40px 0 20px;
  text-align: center;
}

.faq-item {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 4px 20px;
  margin-bottom: 12px;
  background: var(--bg-alt);
}

.faq-item summary {
  cursor: pointer;
  font-weight: 600;
  padding: 16px 0;
  list-style: none;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: "+";
  float: right;
  color: var(--accent);
  font-weight: 400;
  font-size: 1.2rem;
}

.faq-item[open] summary::after {
  content: "−";
}

.faq-item p {
  margin: 0 0 16px;
  color: var(--text-muted);
  font-size: 0.95rem;
}

section.cta-band {
  text-align: center;
  padding: 48px 0 64px;
  border-top: 1px solid var(--border);
}

section.cta-band h2 {
  font-size: 1.5rem;
  margin: 0 0 12px;
}

section.cta-band p {
  color: var(--text-muted);
  margin: 0 0 28px;
}

footer.site {
  border-top: 1px solid var(--border);
  padding: 28px 0 40px;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.85rem;
}

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

footer.site nav {
  margin-top: 10px;
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}