:root {
  --bg: #0b0e11;
  --bg2: #10151c;
  --line: rgba(240, 185, 11, 0.18);
  --text: #eaecef;
  --muted: #8b949e;
  --yellow: #f0b90b;
  --font: "IBM Plex Sans", "Segoe UI", system-ui, sans-serif;
}

* { box-sizing: border-box; }
html, body {
  margin: 0;
  min-height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.5;
}
a { color: inherit; text-decoration: none; }
.wrap {
  width: min(1080px, calc(100% - 40px));
  margin: 0 auto;
}

/* atmosphere */
body {
  background:
    radial-gradient(900px 520px at 12% -10%, rgba(240, 185, 11, 0.14), transparent 55%),
    radial-gradient(700px 480px at 95% 20%, rgba(30, 136, 229, 0.1), transparent 50%),
    linear-gradient(180deg, #0b0e11 0%, #0e1319 48%, #0b0e11 100%);
  background-attachment: fixed;
}

.top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 22px 0 8px;
}
.top-brand {
  font-family: var(--font);
  font-weight: 700;
  letter-spacing: 0.02em;
  font-size: 1.15rem;
}
.top-brand span { color: var(--yellow); }
.top-link {
  color: var(--muted);
  font-size: 0.92rem;
  border-bottom: 1px solid transparent;
  transition: color .2s, border-color .2s;
}
.top-link:hover {
  color: var(--text);
  border-color: rgba(234, 236, 239, 0.35);
}
.top-nav {
  display: flex;
  gap: 16px;
  align-items: center;
}

.hero {
  min-height: calc(100vh - 88px);
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 48px 0 72px;
  position: relative;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 8% -8% auto auto;
  width: min(420px, 55vw);
  height: min(420px, 55vw);
  border: 1px solid var(--line);
  border-radius: 50%;
  opacity: 0.55;
  pointer-events: none;
  animation: drift 18s ease-in-out infinite alternate;
}
.hero::after {
  content: "";
  position: absolute;
  inset: 22% 4% auto auto;
  width: min(260px, 38vw);
  height: min(260px, 38vw);
  border: 1px solid rgba(30, 136, 229, 0.2);
  border-radius: 50%;
  pointer-events: none;
  animation: drift 14s ease-in-out infinite alternate-reverse;
}
@keyframes drift {
  from { transform: translate3d(0, 0, 0); }
  to { transform: translate3d(-18px, 24px, 0); }
}

.brand-mark {
  font-family: var(--font);
  font-weight: 700;
  font-size: clamp(2.75rem, 7vw, 4.5rem);
  line-height: 1.05;
  letter-spacing: 0.02em;
  margin: 0 0 28px;
  font-stretch: normal;
  transform: none;
  animation: rise 0.9s ease both;
}
.brand-mark span { color: var(--yellow); }

.headline {
  font-size: clamp(1.25rem, 3.2vw, 1.75rem);
  font-weight: 600;
  margin: 0 0 14px;
  max-width: 18em;
  animation: rise 0.9s ease 0.08s both;
}
.support {
  margin: 0 0 36px;
  color: var(--muted);
  max-width: 28em;
  font-size: 1.05rem;
  animation: rise 0.9s ease 0.16s both;
}
@keyframes rise {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  animation: rise 0.9s ease 0.24s both;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  padding: 12px 20px;
  font-weight: 600;
  border: 1px solid transparent;
  transition: transform .15s ease, filter .15s ease, border-color .15s;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary {
  background: var(--yellow);
  color: #1e2026;
}
.btn-primary:hover { filter: brightness(1.05); }
.btn-ghost {
  border-color: var(--line);
  color: var(--text);
  background: rgba(255, 255, 255, 0.02);
}
.btn-ghost:hover { border-color: rgba(240, 185, 11, 0.45); }

.features {
  padding: 20px 0 80px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}
.features h2 {
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0 0 28px;
}
.grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}
.card {
  padding: 22px 20px;
  border: 1px solid rgba(255, 255, 255, 0.07);
  border-radius: 12px;
  background:
    linear-gradient(160deg, rgba(240, 185, 11, 0.06), transparent 42%),
    rgba(16, 21, 28, 0.72);
  transition: border-color .2s, transform .2s;
}
.card:hover {
  border-color: rgba(240, 185, 11, 0.35);
  transform: translateY(-2px);
}
.card h3 {
  margin: 0 0 10px;
  font-size: 1.05rem;
  font-weight: 600;
}
.card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.55;
}

.foot {
  padding: 28px 0 40px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  color: var(--muted);
  font-size: 0.85rem;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
  justify-content: space-between;
}
.risk { max-width: 36em; }

@media (max-width: 820px) {
  .grid { grid-template-columns: 1fr; }
  .hero { min-height: auto; padding: 36px 0 56px; }
  .hero::before, .hero::after { opacity: 0.35; }
}