:root {
  --spine-indigo: #5b5bd6;
  --spine-indigo-2: #4f46e5;
}

/* ---------- Hero ---------- */
.spine-hero {
  position: relative;
  padding: 4.5rem 1rem 3.5rem;
  text-align: center;
  overflow: hidden;
  background:
    radial-gradient(60% 120% at 50% -10%, rgba(129, 140, 248, 0.22), transparent 60%),
    linear-gradient(180deg, var(--md-default-bg-color), var(--md-default-bg-color));
}

.spine-hero__inner {
  max-width: 56rem;
  margin: 0 auto;
}

.spine-hero__logo {
  width: 84px;
  height: 84px;
  margin-bottom: 0.75rem;
  filter: drop-shadow(0 10px 30px rgba(79, 70, 229, 0.35));
}

.spine-hero__title {
  font-size: 3.4rem;
  line-height: 1.05;
  font-weight: 800;
  margin: 0.25rem 0 0.5rem;
  letter-spacing: -0.02em;
  background: linear-gradient(120deg, var(--spine-indigo) 0%, #8b5cf6 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.spine-hero__tagline {
  font-size: 1.3rem;
  font-weight: 600;
  margin: 0 auto 0.5rem;
  max-width: 40rem;
}

.spine-hero__sub {
  font-size: 0.95rem;
  color: var(--md-default-fg-color--light);
  max-width: 42rem;
  margin: 0 auto 1.6rem;
}

.spine-hero__cta {
  display: flex;
  gap: 0.6rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 2rem;
}

.spine-hero__cta .md-button {
  border-radius: 0.6rem;
}

.spine-hero__ghost {
  border-color: var(--md-default-fg-color--lighter);
}

.spine-hero__code {
  max-width: 34rem;
  margin: 0 auto 1.5rem;
  text-align: left;
  background: var(--md-code-bg-color);
  border: 1px solid var(--md-default-fg-color--lightest);
  border-radius: 0.8rem;
  padding: 1.1rem 1.3rem;
  box-shadow: 0 18px 50px -25px rgba(79, 70, 229, 0.45);
  overflow-x: auto;
}

.spine-hero__code pre { margin: 0; }
.spine-hero__code code { font-size: 0.85rem; line-height: 1.6; }
.spine-k { color: #c084fc; font-weight: 600; }
.spine-s { color: #34d399; }
.spine-fn { color: #60a5fa; }

.spine-hero__badges {
  display: flex;
  gap: 0.5rem;
  justify-content: center;
  flex-wrap: wrap;
}

.spine-hero__badges span {
  font-size: 0.78rem;
  font-weight: 600;
  padding: 0.35rem 0.8rem;
  border-radius: 999px;
  color: var(--spine-indigo-2);
  background: rgba(91, 91, 214, 0.1);
  border: 1px solid rgba(91, 91, 214, 0.25);
}

[data-md-color-scheme="slate"] .spine-hero__badges span {
  color: #c7d2fe;
  background: rgba(129, 140, 248, 0.12);
  border-color: rgba(129, 140, 248, 0.3);
}

/* keep the home body readable + centered under the hero */
.spine-home-body {
  max-width: 56rem;
  margin: 0 auto;
}

/* ---------- Feature grid cards ---------- */
.md-typeset .grid.cards > ul > li {
  border-radius: 0.8rem;
  transition: border-color 0.2s, box-shadow 0.2s, transform 0.2s;
}

.md-typeset .grid.cards > ul > li:hover {
  border-color: var(--spine-indigo);
  box-shadow: 0 12px 40px -22px rgba(79, 70, 229, 0.6);
  transform: translateY(-2px);
}

@media screen and (max-width: 48rem) {
  .spine-hero__title { font-size: 2.4rem; }
  .spine-hero { padding-top: 3rem; }
}