:root {
  --accent: #5856D6;
  --accent-dark: #423fa8;
  --bg: #ffffff;
  --bg-alt: #f5f5f8;
  --text: #1c1c1e;
  --text-secondary: #6e6e73;
  --border: #e5e5ea;
  --radius: 16px;
  --max-width: 1080px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0e0e10;
    --bg-alt: #17171a;
    --text: #f5f5f7;
    --text-secondary: #a1a1a6;
    --border: #2c2c2e;
  }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}

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

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

header.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  backdrop-filter: saturate(180%) blur(16px);
  -webkit-backdrop-filter: saturate(180%) blur(16px);
  border-bottom: 1px solid var(--border);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
}

.site-header .brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  font-size: 17px;
  color: var(--text);
}

.site-header .brand img {
  width: 28px;
  height: 28px;
  border-radius: 7px;
}

.site-header .bar {
  display: flex;
  align-items: center;
  gap: 28px;
}

.lang-switch {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 600;
  border-left: 1px solid var(--border);
  padding-left: 18px;
}

.lang-switch a {
  color: var(--text-secondary);
  padding: 4px 8px;
  border-radius: 6px;
}

.lang-switch a:hover { text-decoration: none; background: var(--bg-alt); }

.lang-switch a.active {
  color: var(--bg);
  background: var(--text);
}

.lang-switch a.active:hover { background: var(--text); }

.site-header nav {
  display: flex;
  gap: 28px;
}

.site-header nav a {
  color: var(--text-secondary);
  font-size: 15px;
  font-weight: 500;
}

.site-header nav a:hover { color: var(--text); text-decoration: none; }

.hero {
  text-align: center;
  padding: 90px 24px 60px;
}

.hero img.app-icon {
  width: 120px;
  height: 120px;
  border-radius: 27px;
  box-shadow: 0 20px 40px rgba(0,0,0,0.15);
  margin-bottom: 28px;
}

.hero h1 {
  font-size: clamp(32px, 6vw, 56px);
  font-weight: 700;
  margin: 0 0 12px;
  letter-spacing: -0.02em;
}

.hero p.tagline {
  font-size: clamp(17px, 2.5vw, 22px);
  color: var(--text-secondary);
  max-width: 560px;
  margin: 0 auto 32px;
}

.badge-row {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 8px;
}

.store-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 22px;
  border-radius: 12px;
  background: var(--text);
  color: var(--bg);
  font-weight: 600;
  font-size: 15px;
  border: 1px solid var(--border);
}

.store-badge.disabled {
  background: var(--bg-alt);
  color: var(--text-secondary);
  cursor: default;
}

.store-badge.disabled:hover { text-decoration: none; }

.platforms-note {
  font-size: 13px;
  color: var(--text-secondary);
  margin-top: 14px;
}

section.features {
  padding: 40px 24px 90px;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 20px;
  max-width: var(--max-width);
  margin: 0 auto;
}

.feature-card {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px;
}

.feature-card .icon {
  font-size: 28px;
  margin-bottom: 14px;
  display: block;
}

.feature-card h3 {
  font-size: 17px;
  margin: 0 0 8px;
}

.feature-card p {
  font-size: 14px;
  color: var(--text-secondary);
  margin: 0;
}

section.platforms {
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 70px 24px;
  text-align: center;
}

section.platforms h2 {
  font-size: 28px;
  margin: 0 0 12px;
}

section.platforms p {
  color: var(--text-secondary);
  max-width: 520px;
  margin: 0 auto 30px;
}

.platform-list {
  display: flex;
  justify-content: center;
  gap: 36px;
  flex-wrap: wrap;
  font-size: 15px;
  font-weight: 500;
}

.platform-list span { color: var(--text-secondary); font-weight: 400; display: block; font-size: 13px; margin-top: 4px; }

main.page {
  padding: 60px 24px 90px;
  max-width: 760px;
  margin: 0 auto;
}

main.page h1 {
  font-size: 34px;
  margin-bottom: 8px;
}

main.page .updated {
  color: var(--text-secondary);
  font-size: 14px;
  margin-bottom: 40px;
}

main.page h2 {
  font-size: 20px;
  margin-top: 40px;
}

main.page h3 {
  font-size: 16px;
  margin-top: 28px;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

main.page p, main.page li {
  color: var(--text);
  font-size: 15.5px;
}

main.page ul { padding-left: 22px; }

.faq-item {
  margin-bottom: 28px;
}

.faq-item .faq-q {
  color: var(--text);
  text-transform: none;
  letter-spacing: normal;
  font-size: 17px;
  font-weight: 600;
  margin-top: 0;
  margin-bottom: 6px;
}

.contact-box {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  margin-top: 16px;
}

footer.site-footer {
  border-top: 1px solid var(--border);
  padding: 32px 24px;
  text-align: center;
  color: var(--text-secondary);
  font-size: 13px;
}

footer.site-footer a { color: var(--text-secondary); }
footer.site-footer nav {
  display: flex;
  gap: 18px;
  justify-content: center;
  margin-bottom: 12px;
}