:root {
  --color-bg: #050118;
  --color-bg-alt: #0c051f;
  --color-surface: #140b2c;
  --color-surface-soft: rgba(139, 92, 246, 0.15);
  --color-primary: #8b5cf6;
  --color-primary-strong: #7c3aed;
  --color-text: #f9fafb;
  --color-muted: #9ca3af;
  --color-border: #27213f;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: radial-gradient(circle at top left, #312e81, #020617 55%);
  color: var(--color-text);
  min-height: 100vh;
}

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

.container {
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 16px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(5, 1, 24, 0.9);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(39, 33, 63, 0.8);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 0;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.logo-mark {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  object-fit: cover;
}

.logo-text {
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  font-size: 18px;
}

.main-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 16px;
}

.nav-link {
  font-size: 13px;
  color: var(--color-muted);
  padding: 4px 0;
  transition: color 0.2s ease, opacity 0.2s ease, background-color 0.2s ease, border-color 0.2s ease;
}

.nav-link:hover {
  color: #e5e7eb;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-download {
  padding: 6px 14px;
  border-radius: 999px;
  border: 1px solid rgba(148, 163, 184, 0.5);
  background: rgba(15, 23, 42, 0.9);
  color: #e5e7eb;
}

.nav-download:hover {
  background: var(--color-primary);
  border-color: var(--color-primary-strong);
  color: #fff;
  box-shadow: 0 8px 18px rgba(139, 92, 246, 0.4);
}

.lang-switch {
  border: 1px solid rgba(148, 163, 184, 0.4);
  background: transparent;
  color: var(--color-muted);
  border-radius: 999px;
  padding: 6px 14px;
  font-size: 13px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.lang-switch.active {
  background: var(--color-primary);
  border-color: var(--color-primary-strong);
  color: #fff;
}

.lang-switch:hover:not(.active) {
  background: rgba(148, 163, 184, 0.1);
}

.hero {
  padding: 40px 0 32px;
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr);
  gap: 32px;
  align-items: center;
}

.pill {
  display: inline-flex;
  align-items: center;
  padding: 6px 12px;
  border-radius: 999px;
  background: var(--color-surface-soft);
  border: 1px solid rgba(139, 92, 246, 0.4);
  color: var(--color-muted);
  font-size: 12px;
  margin-bottom: 12px;
}

.hero h1 {
  font-size: clamp(26px, 4vw, 34px);
  line-height: 1.1;
  margin-bottom: 12px;
}

.hero-subtitle {
  color: var(--color-muted);
  font-size: 14px;
  max-width: 460px;
  margin-bottom: 20px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 14px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 20px;
  border-radius: 999px;
  font-size: 14px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn.primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-strong));
  color: #fff;
  box-shadow: 0 10px 25px rgba(139, 92, 246, 0.4);
}

.btn.primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 14px 30px rgba(139, 92, 246, 0.55);
}

.btn.ghost {
  background: transparent;
  border-color: rgba(148, 163, 184, 0.5);
  color: var(--color-text);
}

.btn.ghost:hover {
  background: rgba(15, 23, 42, 0.6);
}

.age-note {
  font-size: 12px;
  color: var(--color-muted);
}

.hero-visual {
  display: flex;
  justify-content: center;
}

.phone-mockup {
  width: 220px;
  height: 420px;
  border-radius: 32px;
  padding: 14px;
  background: radial-gradient(circle at top, #4c1d95, #020617);
  border: 1px solid rgba(148, 163, 184, 0.3);
  box-shadow: 0 24px 60px rgba(15, 23, 42, 0.9);
}

.phone-screen {
  height: 100%;
  border-radius: 24px;
  background: linear-gradient(160deg, rgba(15, 23, 42, 0.95), rgba(30, 64, 175, 0.9));
  padding: 18px 14px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
}

.phone-logo {
  width: 44px;
  height: 44px;
  border-radius: 16px;
  background: linear-gradient(135deg, var(--color-primary-strong), #ec4899);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
}

.phone-caption {
  font-size: 13px;
  color: #e5e7eb;
  text-align: center;
}

.section {
  padding: 28px 0;
}

.section-alt {
  background: radial-gradient(circle at top right, rgba(76, 29, 149, 0.45), transparent 55%),
              linear-gradient(to bottom, rgba(15, 23, 42, 0.9), rgba(15, 23, 42, 0.95));
}

.section-title {
  font-size: 20px;
  margin-bottom: 18px;
}

.section-subtitle {
  font-size: 13px;
  color: var(--color-muted);
  max-width: 520px;
  margin-bottom: 18px;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.feature-card {
  background: rgba(15, 23, 42, 0.8);
  border-radius: 16px;
  border: 1px solid var(--color-border);
  padding: 16px;
}

.feature-card h3 {
  font-size: 16px;
  margin-bottom: 6px;
}

.feature-card p {
  font-size: 13px;
  color: var(--color-muted);
}

.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.step-card {
  background: rgba(15, 23, 42, 0.9);
  border-radius: 16px;
  border: 1px solid var(--color-border);
  padding: 16px;
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  border-radius: 999px;
  font-size: 13px;
  background: var(--color-surface-soft);
  color: var(--color-muted);
  margin-bottom: 8px;
}

.step-card h3 {
  font-size: 15px;
  margin-bottom: 4px;
}

.step-card p {
  font-size: 13px;
  color: var(--color-muted);
}

.two-column {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
  gap: 20px;
  align-items: flex-start;
}

.screenshots-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.screenshot-card {
  background: rgba(15, 23, 42, 0.9);
  border-radius: 16px;
  border: 1px solid var(--color-border);
  padding: 10px;
  display: flex;
  justify-content: center;
}

.screenshot-card img {
  width: 100%;
  height: auto;
  border-radius: 12px;
  display: block;
}

.card {
  background: rgba(15, 23, 42, 0.9);
  border-radius: 16px;
  border: 1px solid var(--color-border);
  padding: 18px;
}

.contact-card h3 {
  font-size: 16px;
  margin-bottom: 8px;
}

.contact-card p {
  font-size: 13px;
  color: var(--color-muted);
  margin-bottom: 12px;
}

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

details {
  background: rgba(15, 23, 42, 0.85);
  border-radius: 12px;
  border: 1px solid var(--color-border);
  padding: 10px 12px;
}

details[open] {
  border-color: var(--color-primary);
}

summary {
  cursor: pointer;
  list-style: none;
  font-size: 14px;
}

summary::-webkit-details-marker {
  display: none;
}

details p {
  margin-top: 6px;
  font-size: 13px;
  color: var(--color-muted);
}

.site-footer {
  border-top: 1px solid rgba(39, 33, 63, 0.9);
  background: #020617;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 14px 0 18px;
}

.footer-left p {
  font-size: 12px;
  color: var(--color-muted);
}

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

.footer-links a {
  font-size: 13px;
  color: var(--color-muted);
}

.footer-links a:hover {
  color: #e5e7eb;
}

@media (max-width: 800px) {
  .hero-inner {
    grid-template-columns: minmax(0, 1fr);
  }

  .hero {
    padding-top: 28px;
  }

  .hero-visual {
    order: -1;
  }

  .two-column {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (max-width: 640px) {
  .features-grid,
  .steps-grid,
  .screenshots-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .header-inner {
    padding: 10px 0;
  }

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