:root {
  color-scheme: dark;
  --bg: #0f1216;
  --panel: #171d22;
  --panel-strong: #202830;
  --text: #f4f7fb;
  --muted: #a8b3c2;
  --line: #2d3640;
  --accent: #4fd1a1;
  --accent-strong: #9be6c6;
  --blue: #8ab4ff;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background:
    linear-gradient(135deg, rgba(79, 209, 161, 0.12), transparent 28rem),
    linear-gradient(315deg, rgba(138, 180, 255, 0.1), transparent 32rem),
    linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px),
    var(--bg);
  background-size: auto, auto, 56px 56px, 56px 56px;
  color: var(--text);
}

a {
  color: inherit;
}

.page-shell {
  width: min(1120px, calc(100% - 32px));
  min-height: 100vh;
  margin: 0 auto;
  display: grid;
  align-content: center;
  gap: 36px;
  padding: 56px 0;
}

.intro {
  max-width: 820px;
}

.site-mark {
  display: block;
  width: 64px;
  height: 64px;
  margin: 0 0 22px;
  border-radius: 14px;
  box-shadow: 0 18px 48px rgba(0, 0, 0, 0.28);
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--accent-strong);
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  font-size: clamp(3rem, 8vw, 6rem);
  line-height: 1;
  letter-spacing: 0;
}

.summary {
  max-width: 700px;
  margin: 20px 0 0;
  color: var(--muted);
  font-size: 1.2rem;
  line-height: 1.6;
}

.links {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.link-card {
  min-height: 178px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.035), transparent),
    var(--panel);
  text-decoration: none;
  box-shadow: 0 18px 54px rgba(0, 0, 0, 0.18);
  transition: transform 160ms ease, border-color 160ms ease, background 160ms ease, box-shadow 160ms ease;
}

.link-card:hover,
.link-card:focus-visible {
  transform: translateY(-4px);
  border-color: var(--accent);
  background: var(--panel-strong);
  box-shadow: 0 22px 70px rgba(0, 0, 0, 0.28);
  outline: none;
}

.link-card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.link-card strong {
  max-width: 12rem;
  font-size: 1.45rem;
  line-height: 1.2;
}

.link-card.primary {
  background:
    linear-gradient(135deg, rgba(79, 209, 161, 0.24), rgba(138, 180, 255, 0.14)),
    var(--panel);
  border-color: rgba(79, 209, 161, 0.45);
}

@media (max-width: 820px) {
  .links {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 520px) {
  .page-shell {
    width: min(100% - 24px, 1120px);
    padding: 32px 0;
  }

  .summary {
    font-size: 1rem;
  }

  .link-card {
    min-height: 144px;
  }
}