:root {
  color-scheme: dark;
  --bg: #090b12;
  --surface: rgba(21, 25, 39, 0.78);
  --surface-strong: rgba(26, 31, 48, 0.94);
  --text: #f4f7ff;
  --muted: #9da9c2;
  --blue: #5b8cff;
  --violet: #8162ff;
  --cyan: #29d8c7;
  --amber: #ffb75c;
  --border: rgba(151, 168, 205, 0.16);
  --shadow: 0 24px 70px rgba(0, 0, 0, 0.3);
}

* { box-sizing: border-box; }

html { min-width: 320px; }

body {
  min-height: 100vh;
  margin: 0;
  overflow-x: hidden;
  background:
    radial-gradient(circle at 84% 12%, rgba(129, 98, 255, 0.13), transparent 30rem),
    radial-gradient(circle at 12% 88%, rgba(41, 216, 199, 0.09), transparent 30rem),
    var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.55;
}

body::before {
  position: fixed;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.018) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.018) 1px, transparent 1px);
  background-size: 40px 40px;
  mask-image: linear-gradient(to bottom, black, transparent 82%);
  content: "";
  pointer-events: none;
}

a { color: inherit; }

.shell {
  width: min(1120px, calc(100% - 40px));
  min-height: 100vh;
  margin-inline: auto;
  display: flex;
  flex-direction: column;
}

.topbar {
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  border-bottom: 1px solid var(--border);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  text-decoration: none;
}

.brand-mark {
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  border: 1px solid rgba(133, 149, 255, 0.35);
  border-radius: 11px;
  background: linear-gradient(145deg, rgba(91, 140, 255, 0.18), rgba(129, 98, 255, 0.08));
  color: #aebdff;
  font-size: 0.78rem;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.08), 0 8px 24px rgba(91, 140, 255, 0.12);
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 650;
  text-decoration: none;
  transition: color 180ms ease;
}

.back-link:hover { color: var(--text); }
.back-link:focus-visible, .card:focus-visible { outline: 3px solid var(--cyan); outline-offset: 5px; }
.back-link svg { width: 18px; height: 18px; transition: transform 180ms ease; }
.back-link:hover svg { transform: translateX(-3px); }

main {
  flex: 1;
  display: grid;
  align-content: center;
  gap: 34px;
  padding: 46px 0 58px;
}

.hero { max-width: 760px; }

.eyebrow {
  margin: 0 0 13px;
  color: var(--cyan);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  font-size: clamp(2.35rem, 4.4vw, 3.9rem);
  font-weight: 760;
  letter-spacing: -0.052em;
  line-height: 1.02;
}

.gradient-text {
  background: linear-gradient(105deg, #f7f9ff 5%, #9eb8ff 45%, #b69cff 70%, #62e5d8 100%);
  background-clip: text;
  color: transparent;
}

.intro {
  max-width: 650px;
  margin: 16px 0 0;
  color: var(--muted);
  font-size: clamp(1rem, 1.4vw, 1.08rem);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(var(--columns, 2), minmax(0, 1fr));
  gap: 18px;
}

.card-grid.three { --columns: 3; }
.card-grid.four { --columns: 4; }

.card {
  --accent: var(--blue);
  position: relative;
  min-height: 218px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  padding: 22px;
  border: 1px solid var(--border);
  border-radius: 22px;
  background: linear-gradient(145deg, var(--surface-strong), var(--surface));
  box-shadow: var(--shadow);
  text-decoration: none;
  isolation: isolate;
  transition: transform 220ms ease, border-color 220ms ease, box-shadow 220ms ease;
}

.card:nth-child(2) { --accent: var(--violet); }
.card:nth-child(3) { --accent: var(--cyan); }
.card:nth-child(4) { --accent: var(--amber); }

.card::before {
  position: absolute;
  inset: 0 0 auto;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), transparent 72%);
  content: "";
  opacity: 0.8;
}

.card::after {
  position: absolute;
  width: 180px;
  height: 180px;
  right: -76px;
  bottom: -94px;
  z-index: -1;
  border-radius: 50%;
  background: var(--accent);
  filter: blur(70px);
  opacity: 0.18;
  content: "";
  transition: opacity 220ms ease, transform 220ms ease;
}

.card:hover {
  transform: translateY(-5px);
  border-color: color-mix(in srgb, var(--accent) 56%, transparent);
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.42);
}

.card:hover::after { opacity: 0.34; transform: scale(1.15); }

.card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.number {
  color: var(--accent);
  font: 700 0.78rem/1 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  letter-spacing: 0.1em;
}

.badge {
  padding: 6px 9px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.04);
  color: #b9c3d9;
  font-size: 0.74rem;
  font-weight: 650;
  white-space: nowrap;
}

.card h2 {
  margin: 25px 0 8px;
  font-size: clamp(1.45rem, 2.5vw, 1.8rem);
  letter-spacing: -0.035em;
  line-height: 1.15;
}

.meta {
  margin: 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.card-action {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  margin-top: auto;
  padding-top: 24px;
  color: #e3e8f8;
  font-size: 0.88rem;
  font-weight: 650;
}

.card-action svg { width: 20px; height: 20px; transition: transform 220ms ease; }
.card:hover .card-action svg { transform: translateX(4px); }

footer {
  padding: 16px 0 19px;
  border-top: 1px solid var(--border);
  color: #78849d;
  font-size: 0.8rem;
}

@media (max-width: 820px) {
  .card-grid.three { --columns: 1; }
  .card-grid.four { --columns: 2; }
}

@media (max-width: 720px) {
  .shell { width: min(100% - 24px, 1120px); }
  .topbar { min-height: 64px; }
  .brand > span:last-child { display: none; }
  main { gap: 28px; padding: 36px 0 46px; align-content: start; }
  h1 { font-size: clamp(2.1rem, 9.5vw, 2.5rem); }
  .intro { margin-top: 14px; font-size: 0.98rem; }
  .card-grid, .card-grid.four { --columns: 1; }
  .card { min-height: 196px; padding: 20px; border-radius: 19px; }
  .card h2 { margin-top: 22px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: 0.01ms !important; }
}