:root {
  --hk-ink: #101820;
  --hk-muted: #53606f;
  --hk-surface: #f4f7f8;
  --hk-panel: #ffffff;
  --hk-border: rgba(16, 24, 32, 0.12);
  --hk-cyan: #007c92;
  --hk-teal: #00a78e;
  --hk-gold: #ffb000;
  --hk-rose: #b64059;
}

body {
  letter-spacing: 0;
}

.content {
  font-size: 1rem;
}

.hk-hero {
  min-height: 440px;
  display: flex;
  align-items: flex-end;
  margin: -1rem -1rem 2rem;
  padding: 3rem;
  color: #ffffff;
  background:
    linear-gradient(90deg, rgba(3, 14, 22, 0.94), rgba(3, 14, 22, 0.58), rgba(3, 14, 22, 0.18)),
    url("https://sdo.gsfc.nasa.gov/assets/img/latest/latest_1024_0171.jpg") center / cover no-repeat;
  border-bottom: 4px solid var(--hk-gold);
}

.hk-hero__content {
  max-width: 680px;
}

.hk-eyebrow {
  margin: 0 0 0.75rem;
  color: #8debf4;
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
}

.hk-hero h1 {
  margin: 0;
  color: #ffffff;
  font-size: clamp(3rem, 7vw, 5.8rem);
  line-height: 0.95;
}

.hk-lead {
  max-width: 58ch;
  margin: 1rem 0 1.4rem;
  color: rgba(255, 255, 255, 0.9);
  font-size: 1.1rem;
  line-height: 1.65;
}

.hk-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.hk-button {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0.62rem 1rem;
  border: 1px solid rgba(255, 255, 255, 0.42);
  border-radius: 6px;
  color: #ffffff !important;
  font-weight: 700;
  text-decoration: none;
  background: rgba(255, 255, 255, 0.08);
}

.hk-button--primary {
  color: #071015 !important;
  border-color: var(--hk-gold);
  background: var(--hk-gold);
}

.hk-card-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1rem;
  margin: 1.5rem 0 2.5rem;
}

.hk-card {
  min-height: 188px;
  padding: 1.1rem;
  border: 1px solid var(--hk-border);
  border-radius: 8px;
  text-decoration: none;
  color: var(--hk-ink) !important;
  background: linear-gradient(180deg, #ffffff, #f8fbfb);
  box-shadow: 0 8px 28px rgba(16, 24, 32, 0.08);
}

.hk-card:hover {
  border-color: rgba(0, 124, 146, 0.48);
  transform: translateY(-1px);
}

.hk-card__label {
  display: block;
  margin-bottom: 0.8rem;
  color: var(--hk-cyan);
  font-size: 0.75rem;
  font-weight: 800;
  text-transform: uppercase;
}

.hk-card strong {
  display: block;
  color: var(--hk-ink);
  font-size: 1.08rem;
}

.hk-card p {
  margin: 0.7rem 0 0;
  color: var(--hk-muted);
  line-height: 1.5;
}

.highlight {
  border-radius: 8px;
}

table.docutils {
  border-radius: 8px;
  overflow: hidden;
}

@media (prefers-color-scheme: dark) {
  .hk-card {
    color: #ecf8fb !important;
    border-color: rgba(141, 235, 244, 0.18);
    background: linear-gradient(180deg, #101820, #0b1218);
    box-shadow: none;
  }

  .hk-card strong {
    color: #ffffff;
  }

  .hk-card p {
    color: #b7c6cf;
  }
}

@media (max-width: 1100px) {
  .hk-card-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 680px) {
  .hk-hero {
    min-height: 380px;
    margin: -1rem -0.75rem 1.5rem;
    padding: 2rem 1.25rem;
  }

  .hk-card-grid {
    grid-template-columns: 1fr;
  }
}