:root {
  --background: #f7f9fc;
  --surface: #ffffff;
  --text: #121b31;
  --muted: #6e7890;
  --line: #e1e7f0;

  --blue: #4c83e7;
  --blue-soft: #edf4ff;

  --green: #2aa584;
  --green-soft: #edf9f5;

  --violet: #8a5edc;
  --violet-soft: #f5efff;

  --cyan: #3d91a6;
  --cyan-soft: #edf8fb;

  --orange: #e59638;
  --orange-soft: #fff5e9;

  --red: #ce606c;
  --red-soft: #fff0f2;

  --slate: #68758d;
  --slate-soft: #f0f3f7;

  --shadow: 0 18px 42px rgba(22, 32, 58, 0.08);
  --shadow-hover: 0 26px 58px rgba(22, 32, 58, 0.13);
}

* {
  box-sizing: border-box;
}

body {
  min-height: 100vh;
  margin: 0;
  font-family:
    Inter,
    system-ui,
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(76, 131, 231, 0.06), transparent 26%),
    radial-gradient(circle at top right, rgba(42, 165, 132, 0.05), transparent 24%),
    var(--background);
}

a {
  color: inherit;
  text-decoration: none;
}

.topbar {
  min-height: 88px;
  display: flex;
  align-items: center;
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(12px);
}

.topbar-inner {
  width: min(1220px, calc(100% - 40px));
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 15px;
}

.brand-mark {
  width: 48px;
  height: 48px;
  border-radius: 15px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, #284f9e, #7454ca);
  color: white;
  font-size: 18px;
  font-weight: 900;
  box-shadow: 0 10px 24px rgba(55, 82, 155, 0.22);
}

.brand-name {
  font-size: 23px;
  font-weight: 800;
  letter-spacing: -0.025em;
}

.back-link {
  padding: 10px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: white;
  color: #4f5b72;
  font-size: 14px;
  font-weight: 800;
}

.back-link:hover {
  background: #f1f4f9;
}

.header-links {
  display: flex;
  gap: 9px;
  flex-wrap: wrap;
}

main {
  width: min(1220px, calc(100% - 40px));
  margin: 0 auto;
  padding: 66px 0 74px;
}

main > h1 {
  margin: 0 0 34px;
  font-size: clamp(34px, 4vw, 50px);
  letter-spacing: -0.04em;
}

.cards {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
}

.card {
  min-height: 235px;
  position: relative;
  overflow: hidden;
  padding: 32px;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 26px;
  border: 1px solid var(--line);
  border-radius: 23px;
  background: var(--surface);
  box-shadow: var(--shadow);
  transition:
    transform 0.2s ease,
    box-shadow 0.2s ease,
    border-color 0.2s ease;
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-hover);
}

.card::before {
  content: "";
  position: absolute;
  inset: 0;
  border: 2px solid transparent;
  border-radius: inherit;
  pointer-events: none;
}

.card-icon {
  width: 96px;
  height: 96px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-size: 31px;
  font-weight: 900;
}

.card-copy h2 {
  margin: 0 0 10px;
  font-size: 27px;
  letter-spacing: -0.025em;
}

.card-copy p {
  max-width: 350px;
  margin: 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.65;
}

.card-arrow {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-size: 25px;
  font-weight: 800;
}

.card-blue::before { border-color: rgba(76, 131, 231, 0.42); }
.card-blue .card-icon,
.card-blue .card-arrow { color: var(--blue); background: var(--blue-soft); }

.card-green::before { border-color: rgba(42, 165, 132, 0.42); }
.card-green .card-icon,
.card-green .card-arrow { color: var(--green); background: var(--green-soft); }

.card-violet::before { border-color: rgba(138, 94, 220, 0.42); }
.card-violet .card-icon,
.card-violet .card-arrow { color: var(--violet); background: var(--violet-soft); }

.card-cyan::before { border-color: rgba(61, 145, 166, 0.42); }
.card-cyan .card-icon,
.card-cyan .card-arrow { color: var(--cyan); background: var(--cyan-soft); }

.card-orange::before { border-color: rgba(229, 150, 56, 0.42); }
.card-orange .card-icon,
.card-orange .card-arrow { color: var(--orange); background: var(--orange-soft); }

.card-red::before { border-color: rgba(206, 96, 108, 0.42); }
.card-red .card-icon,
.card-red .card-arrow { color: var(--red); background: var(--red-soft); }

.card-slate::before { border-color: rgba(104, 117, 141, 0.42); }
.card-slate .card-icon,
.card-slate .card-arrow { color: var(--slate); background: var(--slate-soft); }

footer {
  padding: 0 0 34px;
  color: var(--muted);
  text-align: center;
  font-size: 13px;
}

.subpage-main {
  min-height: calc(100vh - 88px);
  display: grid;
  place-items: center;
  padding: 40px 20px;
}

.placeholder {
  width: min(700px, 100%);
  padding: 46px;
  text-align: center;
  border: 1px solid var(--line);
  border-radius: 25px;
  background: white;
  box-shadow: var(--shadow);
}

.placeholder-icon {
  width: 92px;
  height: 92px;
  margin: 0 auto 24px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: var(--blue-soft);
  color: var(--blue);
  font-size: 32px;
  font-weight: 900;
}

.placeholder-label {
  margin: 0 0 8px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.placeholder h1 {
  margin: 0 0 14px;
  font-size: 44px;
  letter-spacing: -0.04em;
}

.placeholder > p:not(.placeholder-label) {
  margin: 0;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.7;
}

.placeholder-note {
  margin-top: 16px !important;
  font-size: 14px !important;
}

.primary-link {
  display: inline-flex;
  margin-top: 28px;
  padding: 12px 16px;
  border-radius: 12px;
  background: #17213a;
  color: white;
  font-weight: 800;
}

.placeholder-green .placeholder-icon { color: var(--green); background: var(--green-soft); }
.placeholder-violet .placeholder-icon { color: var(--violet); background: var(--violet-soft); }
.placeholder-cyan .placeholder-icon { color: var(--cyan); background: var(--cyan-soft); }
.placeholder-orange .placeholder-icon { color: var(--orange); background: var(--orange-soft); }
.placeholder-red .placeholder-icon { color: var(--red); background: var(--red-soft); }
.placeholder-slate .placeholder-icon { color: var(--slate); background: var(--slate-soft); }

@media (max-width: 900px) {
  .cards {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 650px) {
  .topbar-inner {
    align-items: flex-start;
    flex-direction: column;
    padding: 14px 0;
  }

  main {
    padding-top: 44px;
  }

  .card {
    grid-template-columns: 1fr auto;
    min-height: auto;
    padding: 26px;
  }

  .card-icon {
    width: 78px;
    height: 78px;
    grid-column: 1 / -1;
  }

  .placeholder {
    padding: 34px 24px;
  }
}

/* OPENSPAD ONTOLOGIES TILE START */
.openspad-ontologies-card {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  min-height: 310px;
  padding: 1.5rem;
  border: 1px solid #dde5ef;
  border-radius: 20px;
  background: #ffffff;
  box-shadow: 0 18px 40px rgba(20,31,58,.08);
}

.openspad-ontologies-icon {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: #eef3ff;
  color: #4f76df;
  font-weight: 800;
  font-size: 1rem;
}

.openspad-ontologies-card-body {
  display: flex;
  flex-direction: column;
  flex: 1;
}

.openspad-ontologies-heading-row {
  display: flex;
  justify-content: space-between;
  gap: .75rem;
  align-items: flex-start;
}

.openspad-ontologies-heading-row h3 {
  margin: 0;
  color: #17223a;
}

.openspad-ontologies-status {
  padding: .28rem .55rem;
  border-radius: 999px;
  background: #eef3ff;
  color: #4f76df;
  font-size: .74rem;
  font-weight: 700;
  white-space: nowrap;
}

.openspad-ontologies-card p,
.openspad-ontologies-card li {
  color: #68738a;
}

.openspad-ontologies-card ul {
  margin: .35rem 0 1.2rem;
  padding-left: 1.15rem;
  line-height: 1.65;
}

.openspad-ontologies-open {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: auto;
  padding: .78rem .9rem;
  border-radius: 10px;
  background: #4f76df;
  color: #ffffff !important;
  font-weight: 700;
  text-decoration: none !important;
}

.openspad-ontologies-open:hover {
  filter: brightness(.97);
}
/* OPENSPAD ONTOLOGIES TILE END */