:root {
  color-scheme: dark;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --black: #050608;
  --panel: #0c0f15;
  --line: rgba(0, 245, 255, 0.28);
  --cyan: #00f5ff;
  --lime: #b6ff00;
  --magenta: #ff2bd6;
  --coral: #ff5a1f;
  --muted: #a8b1c2;
}

* {
  box-sizing: border-box;
}

body {
  background:
    radial-gradient(circle at 16% 0%, rgba(255, 43, 214, 0.18), transparent 28%),
    radial-gradient(circle at 88% 12%, rgba(0, 245, 255, 0.15), transparent 28%),
    var(--black);
  color: #f5f8ff;
  margin: 0;
  min-width: 320px;
}

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

.topbar {
  align-items: center;
  background: rgba(5, 6, 8, 0.8);
  border-bottom: 1px solid rgba(0, 245, 255, 0.2);
  display: flex;
  justify-content: space-between;
  padding: 16px clamp(18px, 5vw, 72px);
}

.topbar img {
  filter: invert(1) drop-shadow(0 0 12px rgba(0, 245, 255, 0.6));
  height: 28px;
  width: 160px;
}

.topbar nav {
  display: flex;
  gap: 18px;
}

.topbar nav a,
.button {
  font-size: 0.92rem;
  font-weight: 900;
  text-decoration: none;
}

.hero {
  padding: clamp(58px, 8vw, 112px) clamp(18px, 5vw, 72px) 34px;
}

.eyebrow {
  color: var(--lime);
  font-size: 0.78rem;
  font-weight: 950;
  margin: 0 0 14px;
  text-transform: uppercase;
}

h1 {
  font-size: clamp(3rem, 7vw, 6.8rem);
  line-height: 0.92;
  margin: 0 0 20px;
  max-width: 1000px;
}

.dek {
  color: #c9d3e4;
  font-size: clamp(1.12rem, 1.8vw, 1.42rem);
  line-height: 1.6;
  max-width: 880px;
}

.notice {
  background: rgba(12, 15, 21, 0.92);
  border: 1px solid rgba(182, 255, 0, 0.3);
  border-left: 4px solid var(--lime);
  border-radius: 8px;
  color: #dbe5f4;
  line-height: 1.6;
  margin-top: 30px;
  max-width: 940px;
  padding: 18px;
}

.layout {
  display: grid;
  gap: 36px;
  grid-template-columns: minmax(0, 1fr) 310px;
  padding: 24px clamp(18px, 5vw, 72px) clamp(64px, 8vw, 118px);
}

article {
  background: rgba(12, 15, 21, 0.88);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: clamp(24px, 4vw, 48px);
}

article h2 {
  color: #fff;
  font-size: clamp(1.8rem, 3vw, 3rem);
  line-height: 1;
  margin: 44px 0 14px;
}

article h2:first-child {
  margin-top: 0;
}

article h3 {
  margin-top: 28px;
}

article p,
article li {
  color: #c9d3e4;
  font-size: 1.04rem;
  line-height: 1.75;
}

article strong {
  color: #fff;
}

ul,
ol {
  padding-left: 22px;
}

.cta {
  background:
    linear-gradient(135deg, rgba(255, 90, 31, 0.2), rgba(255, 43, 214, 0.18)),
    #090b10;
  border: 1px solid rgba(255, 43, 214, 0.4);
  border-radius: 8px;
  margin-top: 42px;
  padding: 26px;
}

.button {
  background: linear-gradient(135deg, var(--coral), var(--magenta));
  border-radius: 4px;
  color: #fff;
  display: inline-flex;
  margin-top: 12px;
  padding: 14px 18px;
}

aside {
  align-self: start;
  background: rgba(5, 6, 8, 0.76);
  border: 1px solid rgba(0, 245, 255, 0.25);
  border-radius: 8px;
  padding: 20px;
  position: sticky;
  top: 18px;
}

aside h2 {
  font-size: 1rem;
  margin: 0 0 14px;
}

aside a {
  display: block;
  font-weight: 800;
  margin: 0 0 12px;
  text-decoration: none;
}

footer {
  border-top: 1px solid rgba(0, 245, 255, 0.2);
  color: var(--muted);
  padding: 28px clamp(18px, 5vw, 72px);
}

@media (max-width: 840px) {
  .topbar,
  .topbar nav {
    align-items: flex-start;
    flex-direction: column;
  }

  .layout {
    grid-template-columns: 1fr;
  }

  aside {
    position: static;
  }
}