:root {
  color-scheme: dark;
  --bg: #0b1020;
  --panel: rgba(15, 23, 42, 0.6);
  --panel-border: rgba(255, 255, 255, 0.08);
  --text: rgba(255, 255, 255, 0.92);
  --muted: rgba(255, 255, 255, 0.62);
  --accent: #818cf8;
  --accent2: #a855f7;
}

* {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
}

body {
  margin: 0;
  font-family:
    ui-sans-serif,
    system-ui,
    -apple-system,
    Segoe UI,
    Roboto,
    Helvetica,
    Arial,
    "Apple Color Emoji",
    "Segoe UI Emoji";
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}

.bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(900px 600px at 20% 10%, rgba(99, 102, 241, 0.22), transparent 60%),
    radial-gradient(900px 600px at 80% 20%, rgba(168, 85, 247, 0.18), transparent 60%),
    radial-gradient(900px 600px at 50% 95%, rgba(14, 165, 233, 0.1), transparent 60%),
    linear-gradient(180deg, rgba(2, 6, 23, 1), rgba(2, 6, 23, 1));
}

.container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 20px;
}

.header {
  position: sticky;
  top: 0;
  backdrop-filter: blur(12px);
  background: rgba(2, 6, 23, 0.55);
  border-bottom: 1px solid var(--panel-border);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 18px 0;
}

.mark {
  width: 44px;
  height: 44px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  box-shadow: 0 18px 50px rgba(99, 102, 241, 0.18);
  font-weight: 800;
}

.title {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 0.2px;
}

.subtitle {
  font-size: 13px;
  color: var(--muted);
}

.main {
  padding: 36px 0 40px;
}

.card {
  border: 1px solid var(--panel-border);
  background: var(--panel);
  border-radius: 18px;
  padding: 26px;
  box-shadow: 0 18px 70px rgba(0, 0, 0, 0.28);
}

.card + .card {
  margin-top: 18px;
}

.hero h1 {
  margin: 0 0 10px;
  font-size: 34px;
  line-height: 1.1;
}

.hero p {
  margin: 0 0 18px;
  color: var(--muted);
  font-size: 16px;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0 0 16px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 14px;
  border-radius: 12px;
  text-decoration: none;
  color: var(--text);
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.92), rgba(168, 85, 247, 0.92));
  border: 1px solid rgba(255, 255, 255, 0.08);
  font-weight: 650;
}

.button.secondary {
  background: rgba(15, 23, 42, 0.4);
  border: 1px solid rgba(255, 255, 255, 0.12);
}

.button:hover {
  filter: brightness(1.05);
}

h2 {
  margin: 0 0 10px;
  font-size: 18px;
  letter-spacing: 0.2px;
}

.muted {
  color: var(--muted);
}

.link {
  color: rgba(129, 140, 248, 0.95);
  text-decoration: none;
  border-bottom: 1px solid rgba(129, 140, 248, 0.35);
}

.link:hover {
  border-bottom-color: rgba(168, 85, 247, 0.55);
}

.fineprint {
  margin: 0;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.55);
}

.footer {
  border-top: 1px solid var(--panel-border);
  background: rgba(2, 6, 23, 0.55);
  backdrop-filter: blur(12px);
  padding: 18px 0;
}

.footer-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: space-between;
  color: rgba(255, 255, 255, 0.6);
  font-size: 13px;
}

@media (max-width: 640px) {
  .hero h1 {
    font-size: 28px;
  }
  .card {
    padding: 20px;
  }
}