:root {
  color-scheme: dark;
  --navy: #080b24;
  --purple: #24134e;
  --panel: rgba(27, 24, 62, 0.72);
  --panel-strong: rgba(38, 27, 84, 0.82);
  --text: #f6f4ff;
  --muted: #c8c2df;
  --accent: #9c7cff;
  --cyan: #8ee9ff;
  --border: rgba(255, 255, 255, 0.17);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  min-height: 100vh;
  margin: 0;
  color: var(--text);
  background:
    radial-gradient(circle at 14% 8%, rgba(113, 80, 255, 0.28), transparent 30rem),
    radial-gradient(circle at 88% 30%, rgba(50, 197, 255, 0.13), transparent 25rem),
    linear-gradient(145deg, #06081c 0%, var(--navy) 48%, #1a0d3a 100%);
  font-family: "Avenir Next", "Segoe UI", system-ui, sans-serif;
  line-height: 1.65;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  opacity: 0.34;
  background-image: radial-gradient(circle, rgba(255, 255, 255, 0.62) 1px, transparent 1.5px);
  background-size: 44px 44px;
  mask-image: linear-gradient(to bottom, black, transparent 78%);
}

a { color: var(--cyan); }
a:hover { color: #d5c8ff; }

.shell {
  width: min(100% - 32px, 920px);
  margin: 0 auto;
}

header { padding: 34px 0 22px; }

.brand {
  display: flex;
  align-items: center;
  gap: 13px;
  color: var(--text);
  text-decoration: none;
  font-size: 1.25rem;
  font-weight: 750;
  letter-spacing: 0.02em;
}

.moon {
  display: grid;
  width: 44px;
  height: 44px;
  place-items: center;
  border: 1px solid rgba(184, 164, 255, 0.58);
  border-radius: 50%;
  background: linear-gradient(145deg, rgba(126, 94, 255, 0.5), rgba(19, 18, 65, 0.45));
  box-shadow: 0 0 28px rgba(134, 93, 255, 0.45);
  font-size: 1.4rem;
}

nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 20px;
}

nav a, .button-link {
  display: inline-flex;
  align-items: center;
  min-height: 38px;
  padding: 8px 13px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.05);
  color: var(--text);
  text-decoration: none;
  font-size: 0.9rem;
}

nav a:hover, .button-link:hover {
  border-color: rgba(157, 124, 255, 0.8);
  background: rgba(126, 91, 255, 0.16);
}

.hero, .content-card, .card {
  border: 1px solid var(--border);
  border-radius: 28px;
  background: linear-gradient(145deg, var(--panel-strong), var(--panel));
  box-shadow: 0 20px 55px rgba(0, 0, 0, 0.32), 0 0 34px rgba(103, 73, 240, 0.16);
  backdrop-filter: blur(18px);
}

.hero { padding: clamp(28px, 6vw, 56px); }

.eyebrow {
  margin: 0 0 10px;
  color: var(--cyan);
  font-size: 0.82rem;
  font-weight: 750;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

h1, h2, h3 { line-height: 1.18; }
h1 { margin: 0; font-size: clamp(2rem, 7vw, 3.7rem); }
h2 { margin: 34px 0 12px; font-size: clamp(1.35rem, 4vw, 1.85rem); }
h3 { margin: 24px 0 8px; font-size: 1.08rem; }
p { margin: 0 0 14px; color: var(--muted); }
.lead { max-width: 62ch; margin-top: 18px; font-size: 1.08rem; }
.tr { color: #d9d3ed; }
.divider { height: 1px; margin: 26px 0; background: rgba(255, 255, 255, 0.12); }

.cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin: 22px 0 8px;
}

.card {
  min-height: 188px;
  padding: 22px;
  color: inherit;
  text-decoration: none;
  transition: transform 160ms ease, border-color 160ms ease;
}

.card:hover { transform: translateY(-3px); border-color: rgba(143, 219, 255, 0.62); }
.card-icon { font-size: 1.65rem; }
.card h2 { margin: 16px 0 8px; font-size: 1.2rem; }
.card p { font-size: 0.93rem; }

.content-card { padding: clamp(22px, 5vw, 46px); margin-bottom: 28px; }
.meta { color: #afa5cc; font-size: 0.92rem; }
ul { margin: 0 0 16px; padding-left: 22px; color: var(--muted); }
li { margin-bottom: 8px; }

.notice {
  margin: 24px 0;
  padding: 17px;
  border-left: 3px solid var(--cyan);
  border-radius: 12px;
  background: rgba(107, 89, 235, 0.12);
}

footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 0 38px;
  color: #aaa2c2;
  font-size: 0.88rem;
}

footer nav { margin: 0; }
footer nav a { min-height: auto; padding: 3px 0; border: 0; background: transparent; color: var(--muted); }

@media (max-width: 720px) {
  .cards { grid-template-columns: 1fr; }
  .card { min-height: 0; }
  header { padding-top: 22px; }
  footer { padding-bottom: 28px; }
}