:root {
  --primary: #0d171f;
  --primary-light: #162230;
  --second: #0998a8;
  --bgColor: #192938;
  --text: #ffffff;
  --text-muted: rgba(255, 255, 255, 0.7);
  --border: rgba(9, 152, 168, 0.25);
  --radius-md: 16px;
  --radius-lg: 24px;
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.4), 0 0 0 1px rgba(9, 152, 168, 0.08);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at top, rgba(9, 152, 168, 0.14), transparent 32%),
    linear-gradient(180deg, var(--bgColor) 0%, var(--primary) 100%);
  color: var(--text);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
}

a {
  color: #0dd3ea;
  text-decoration: none;
}

.shell {
  max-width: 1160px;
  margin: 0 auto;
  padding: 24px 20px 64px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  flex-wrap: wrap;
  margin-bottom: 42px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-weight: 800;
  letter-spacing: 0.02em;
}

.brand img {
  width: 48px;
  height: 48px;
  border-radius: 12px;
}

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

.nav a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 12px;
  border-radius: 999px;
  color: rgba(255, 255, 255, 0.8);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(9, 152, 168, 0.18);
}

.nav a:hover {
  color: #fff;
  background: rgba(9, 152, 168, 0.14);
}

.hero {
  max-width: 820px;
  margin: 0 auto 34px;
}

.kicker {
  display: inline-block;
  padding: 6px 14px;
  border-radius: 999px;
  background: rgba(9, 152, 168, 0.12);
  color: #0dd3ea;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 12px;
  font-weight: 700;
  margin-bottom: 14px;
}

h1 {
  margin: 0 0 14px;
  font-size: clamp(2.2rem, 7vw, 4rem);
  line-height: 1.08;
  letter-spacing: -0.03em;
}

.subtitle {
  color: var(--text-muted);
  font-size: clamp(1rem, 2.4vw, 1.12rem);
  max-width: 760px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
  margin-top: 32px;
}

.card {
  background: var(--primary-light);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: clamp(20px, 3vw, 32px);
  box-shadow: var(--shadow-card);
}

.card h2,
.card h3 {
  margin-top: 0;
  color: #fff;
}

.card p {
  color: var(--text-muted);
}

.roadmap {
  display: grid;
  gap: 12px;
  margin-top: 18px;
}

.roadmap-item {
  padding: 16px 18px;
  border-radius: var(--radius-md);
  border: 1px solid rgba(9, 152, 168, 0.18);
  background: rgba(0, 0, 0, 0.12);
}

.roadmap-item strong {
  display: block;
  margin-bottom: 6px;
  color: #fff;
}

.stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-top: 20px;
}

.stat {
  padding: 18px 16px;
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, rgba(9, 152, 168, 0.12), rgba(9, 152, 168, 0.05));
  border: 1px solid rgba(9, 152, 168, 0.18);
  box-shadow: var(--shadow-card);
}

.stat strong {
  display: block;
  color: #fff;
  font-size: 1.25rem;
  margin-bottom: 6px;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 12px 18px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 700;
}

.btn-primary {
  background: #0998a8;
  color: #fff;
}

.btn-outline {
  background: transparent;
  border-color: rgba(9, 152, 168, 0.45);
  color: #fff;
}

.btn-ghost {
  background: rgba(255, 255, 255, 0.05);
  color: #fff;
  border-color: rgba(255, 255, 255, 0.08);
}

.faq-list {
  display: grid;
  gap: 14px;
}

details {
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 18px 20px;
  background: rgba(0, 0, 0, 0.12);
  box-shadow: var(--shadow-card);
}

summary {
  cursor: pointer;
  color: #fff;
  font-weight: 700;
}

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

details p {
  margin-bottom: 0;
}

footer {
  margin-top: 42px;
  color: var(--text-muted);
  text-align: center;
}

@media (max-width: 900px) {
  .grid,
  .stats {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .shell {
    padding: 18px 16px 48px;
  }

  .topbar {
    align-items: flex-start;
  }

  .actions .btn {
    width: 100%;
  }
}