:root {
  --bg: #061019;
  --card: #0c1822;
  --border: #18313b;
  --cyan: #00e5ff;
  --green: #00ff88;
  --amber: #ffb020;
  --text: #e6f1ff;
  --muted: #8a94a6;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  background:
    linear-gradient(rgba(16, 43, 53, .14) 1px, transparent 1px),
    linear-gradient(90deg, rgba(16, 43, 53, .14) 1px, transparent 1px),
    var(--bg);
  background-size: 34px 34px;
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
}

main {
  width: min(760px, calc(100% - 32px));
  margin: 0 auto;
  padding: 42px 0 52px;
}

a { color: var(--cyan); }

.brand {
  color: var(--cyan);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .12em;
}

h1 {
  font-size: clamp(30px, 5vw, 38px);
  margin: 10px 0 8px;
}

.effective {
  margin: 0 0 28px;
  color: var(--muted);
  font-size: 14px;
}

section {
  background: rgba(12, 24, 34, .94);
  border: 1px solid var(--border);
  border-radius: 14px;
  margin: 0 0 12px;
  padding: 18px 20px;
}

section h2 {
  color: var(--cyan);
  font-size: 16px;
  margin: 0 0 8px;
}

section.notice h2 { color: var(--amber); }

p {
  color: var(--muted);
  font-size: 15px;
  line-height: 1.6;
  margin: 0;
}

footer {
  border-top: 1px solid var(--border);
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  margin-top: 30px;
  padding-top: 20px;
  font-size: 14px;
}

.landing-shell {
  width: min(860px, calc(100% - 32px));
  min-height: 100vh;
  align-content: center;
  padding: 48px 0;
}

.hero {
  text-align: center;
  margin: 0 auto 38px;
  max-width: 650px;
}

.app-icon {
  display: block;
  width: 108px;
  height: 108px;
  border-radius: 24px;
  margin: 0 auto 22px;
  box-shadow: 0 0 30px rgba(0, 229, 255, .15);
}

.hero h1 {
  margin: 12px 0 14px;
}

.hero-copy {
  margin: 0 auto 22px;
  max-width: 590px;
}

.contact {
  border: 1px solid rgba(0, 229, 255, .28);
  border-radius: 999px;
  display: inline-flex;
  font-size: 14px;
  padding: 10px 18px;
  text-decoration: none;
}

.link-grid {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(3, 1fr);
}

.landing-card {
  background: rgba(12, 24, 34, .94);
  border: 1px solid var(--border);
  border-radius: 16px;
  min-height: 165px;
  padding: 21px;
  text-decoration: none;
  transition: border-color .2s ease, box-shadow .2s ease;
}

.landing-card:hover {
  border-color: rgba(0, 229, 255, .45);
  box-shadow: 0 0 22px rgba(0, 229, 255, .08);
}

.card-label {
  color: var(--cyan);
  display: block;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .12em;
  margin-bottom: 18px;
}

.card-label.green { color: var(--green); }

.landing-card strong {
  color: var(--text);
  display: block;
  font-size: 18px;
  margin-bottom: 9px;
}

.landing-card span:last-child {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.5;
}

.landing-footer {
  justify-content: space-between;
  color: var(--muted);
}

@media (max-width: 700px) {
  .link-grid {
    grid-template-columns: 1fr;
  }

  .landing-card {
    min-height: auto;
  }
}