:root {
  --bg: #ffffff;
  --ink: #000000;
  --ink-soft: #333333;
  --divider: #e0e0e0;
  --lotus: #E91E90;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Inconsolata", "Roboto", "Helvetica", "Arial", sans-serif;
  font-weight: 400;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 {
  font-weight: 500;
  letter-spacing: -0.01em;
}

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

a:hover {
  text-decoration: underline;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 960px;
  margin: 0 auto;
  padding: 24px 32px;
  border-bottom: 1px solid var(--ink);
}

.nav-brand {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--ink);
  font-weight: 600;
  font-size: 18px;
  letter-spacing: 0.02em;
}

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

.nav-logo {
  width: 12px;
  height: 12px;
  flex-shrink: 0;
}

.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
}

.lang-btn {
  background: transparent;
  border: none;
  padding: 0;
  margin: 0;
  font: inherit;
  color: var(--ink-soft);
  cursor: pointer;
  font-weight: 400;
}

.lang-btn:hover {
  color: var(--ink);
}

.lang-btn.active {
  color: var(--ink);
  font-weight: 600;
  text-decoration: underline;
}

.lang-sep {
  color: var(--ink-soft);
}

.btn {
  display: inline-block;
  padding: 12px 24px;
  border-radius: 0;
  font-family: inherit;
  font-weight: 600;
  font-size: 15px;
  text-transform: none;
  border: 1px solid var(--ink);
  background: #ffffff;
  color: var(--ink);
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease;
}

.btn:hover {
  background: var(--ink);
  color: #ffffff;
  text-decoration: none;
}

main {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 32px;
}

.hero {
  padding: 96px 0 80px;
  max-width: 720px;
}

.hero h1 {
  font-size: clamp(32px, 5vw, 48px);
  line-height: 1.15;
  margin: 0 0 24px;
}

.lede {
  font-size: 18px;
  color: var(--ink-soft);
  margin: 0 0 32px;
}

.hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.features {
  padding: 64px 0;
  border-top: 1px solid var(--divider);
}

.features h2 {
  font-size: clamp(24px, 3.5vw, 32px);
  margin: 0 0 40px;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 0;
  border-top: 1px solid var(--ink);
  border-left: 1px solid var(--ink);
}

.feature {
  padding: 28px;
  border-right: 1px solid var(--ink);
  border-bottom: 1px solid var(--ink);
}

.feature h3 {
  margin: 0 0 10px;
  font-size: 16px;
  font-weight: 600;
}

.feature p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 15px;
}

.note {
  padding: 80px 0;
  border-top: 1px solid var(--divider);
  max-width: 640px;
}

.note p {
  margin: 0;
  font-size: 18px;
  color: var(--ink);
}

.cta {
  padding: 40px 0 120px;
}

.footer {
  border-top: 1px solid var(--ink);
  padding: 24px 32px;
  max-width: 960px;
  margin: 0 auto;
  color: var(--ink-soft);
  font-size: 13px;
}

.footer p {
  margin: 0;
}

@media (max-width: 640px) {
  .nav {
    padding: 20px;
  }
  main {
    padding: 0 20px;
  }
  .hero {
    padding: 48px 0 40px;
  }
  .features,
  .note {
    padding: 40px 0;
  }
  .cta {
    padding: 24px 0 64px;
  }
  .footer {
    padding: 20px;
  }
}