/* SEO landing pages — Riddle hub /go/* */
:root {
  color-scheme: dark;
  --riddle-bg: #07070c;
  --riddle-card: #111118;
  --riddle-border: #1f1f2e;
  --riddle-text: #f4f4f8;
  --riddle-muted: #8b8ba3;
  --riddle-violet: #8b5cf6;
  --riddle-fuchsia: #d946ef;
  --riddle-cyan: #22d3ee;
  --riddle-success: #34d399;
  --riddle-radius: 16px;
  --riddle-radius-lg: 24px;
  --riddle-font: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  min-height: 100%;
  margin: 0;
}

body {
  font-family: var(--riddle-font);
  background:
    radial-gradient(1200px 600px at 10% -10%, rgba(139, 92, 246, 0.18), transparent 55%),
    radial-gradient(900px 500px at 90% 0%, rgba(217, 70, 239, 0.12), transparent 50%),
    radial-gradient(800px 400px at 50% 100%, rgba(34, 211, 238, 0.08), transparent 45%),
    var(--riddle-bg);
  color: var(--riddle-text);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--riddle-cyan);
  text-decoration: none;
}
a:hover {
  text-decoration: underline;
}

.seo-wrap {
  max-width: 68rem;
  margin: 0 auto;
  padding: 1.25rem 1rem 4rem;
}

.seo-nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--riddle-border);
}

.seo-brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  color: inherit;
  text-decoration: none;
  font-weight: 700;
}
.seo-brand img {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  object-fit: cover;
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.1);
}
.seo-brand:hover {
  text-decoration: none;
}

.seo-nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 0.85rem;
  font-size: 0.88rem;
}
.seo-nav-links a {
  color: var(--riddle-muted);
}
.seo-nav-links a:hover {
  color: var(--riddle-text);
}

.breadcrumb {
  font-size: 0.8rem;
  color: var(--riddle-muted);
  margin: 0 0 0.75rem;
}
.breadcrumb a {
  color: var(--riddle-muted);
}
.breadcrumb a:hover {
  color: var(--riddle-cyan);
}

.kicker {
  display: inline-flex;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--riddle-muted);
  margin: 0 0 0.5rem;
}

h1 {
  font-size: clamp(1.65rem, 4vw, 2.35rem);
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin: 0 0 0.75rem;
}

.lead {
  color: var(--riddle-muted);
  font-size: 1.02rem;
  max-width: 42rem;
  margin: 0 0 1.25rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin-bottom: 1.75rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.7rem 1.15rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.92rem;
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none !important;
  transition: transform 0.12s, border-color 0.12s, background 0.12s;
}
.btn:hover {
  transform: translateY(-1px);
}
.btn-primary {
  background: linear-gradient(135deg, var(--riddle-violet), var(--riddle-fuchsia));
  color: #fff !important;
  box-shadow: 0 0 28px -8px rgba(139, 92, 246, 0.55);
}
.btn-ghost {
  background: rgba(0, 0, 0, 0.35);
  border-color: var(--riddle-border);
  color: var(--riddle-text) !important;
}
.btn-ghost:hover {
  border-color: rgba(139, 92, 246, 0.45);
}

.layout {
  display: grid;
  gap: 1.25rem;
  grid-template-columns: 1fr;
}
@media (min-width: 900px) {
  .layout {
    grid-template-columns: 1fr 18.5rem;
    align-items: start;
  }
}

.card {
  background: rgba(17, 17, 24, 0.9);
  border: 1px solid var(--riddle-border);
  border-radius: var(--riddle-radius-lg);
  padding: 1.2rem 1.25rem;
  margin-bottom: 1rem;
}
.card h2 {
  margin: 0 0 0.65rem;
  font-size: 1.2rem;
  letter-spacing: -0.02em;
}
.card h3 {
  margin: 0 0 0.4rem;
  font-size: 1rem;
}
.card p {
  margin: 0 0 0.75rem;
  color: var(--riddle-muted);
  font-size: 0.94rem;
}
.card p:last-child {
  margin-bottom: 0;
}

.steps {
  margin: 0;
  padding-left: 1.15rem;
  color: var(--riddle-muted);
}
.steps li {
  margin-bottom: 0.45rem;
}

.grid-2 {
  display: grid;
  gap: 0.75rem;
  grid-template-columns: 1fr;
}
@media (min-width: 640px) {
  .grid-2 {
    grid-template-columns: 1fr 1fr;
  }
}

.route-card {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 1rem 1.1rem;
  border-radius: var(--riddle-radius);
  border: 1px solid rgba(139, 92, 246, 0.35);
  background: linear-gradient(135deg, rgba(139, 92, 246, 0.12), rgba(34, 211, 238, 0.06));
  margin-bottom: 1rem;
}
.route-pair {
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}
.route-meta {
  font-size: 0.82rem;
  color: var(--riddle-muted);
}

.pill-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin: 0.5rem 0 0;
  padding: 0;
  list-style: none;
}
.pill-list a {
  display: inline-flex;
  padding: 0.35rem 0.7rem;
  border-radius: 999px;
  border: 1px solid var(--riddle-border);
  background: rgba(0, 0, 0, 0.3);
  color: var(--riddle-text);
  font-size: 0.8rem;
  text-decoration: none;
}
.pill-list a:hover {
  border-color: rgba(139, 92, 246, 0.45);
  color: var(--riddle-cyan);
}

.faq details {
  border: 1px solid var(--riddle-border);
  border-radius: 12px;
  padding: 0.7rem 0.9rem;
  margin-bottom: 0.5rem;
  background: rgba(0, 0, 0, 0.25);
}
.faq summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--riddle-text);
}
.faq details p {
  margin: 0.55rem 0 0;
  color: var(--riddle-muted);
  font-size: 0.9rem;
}

.related {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem 0.85rem;
  margin-top: 0.5rem;
}
.related a {
  font-size: 0.88rem;
}

.aside-sticky {
  position: sticky;
  top: 1rem;
}
.aside-sticky .btn {
  width: 100%;
  margin-bottom: 0.5rem;
}
.tag {
  display: inline-block;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--riddle-violet);
  margin-bottom: 0.35rem;
}

.cta-band {
  margin-top: 1.5rem;
  padding: 1.5rem;
  border-radius: var(--riddle-radius-lg);
  border: 1px solid rgba(139, 92, 246, 0.35);
  background: linear-gradient(135deg, rgba(139, 92, 246, 0.18), rgba(217, 70, 239, 0.08));
  text-align: center;
}
.cta-band h2 {
  margin: 0 0 0.5rem;
  font-size: 1.35rem;
}
.cta-band p {
  margin: 0 0 1rem;
  color: var(--riddle-muted);
}

.seo-footer {
  margin-top: 2.5rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--riddle-border);
  font-size: 0.82rem;
  color: var(--riddle-muted);
}
.seo-footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  margin-bottom: 0.75rem;
}
.seo-footer a {
  color: var(--riddle-muted);
}
.seo-footer a:hover {
  color: var(--riddle-cyan);
}

.hub-grid {
  display: grid;
  gap: 0.75rem;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
}
.hub-grid a {
  display: block;
  padding: 0.9rem 1rem;
  border-radius: var(--riddle-radius);
  border: 1px solid var(--riddle-border);
  background: rgba(17, 17, 24, 0.85);
  color: inherit;
  text-decoration: none;
  transition: border-color 0.12s, transform 0.12s;
}
.hub-grid a:hover {
  border-color: rgba(139, 92, 246, 0.45);
  transform: translateY(-1px);
  text-decoration: none;
}
.hub-grid strong {
  display: block;
  margin-bottom: 0.25rem;
  font-size: 0.95rem;
}
.hub-grid span {
  font-size: 0.8rem;
  color: var(--riddle-muted);
}

.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 1rem;
}
.filters button {
  font: inherit;
  font-size: 0.8rem;
  font-weight: 600;
  padding: 0.4rem 0.75rem;
  border-radius: 999px;
  border: 1px solid var(--riddle-border);
  background: rgba(0, 0, 0, 0.3);
  color: var(--riddle-muted);
  cursor: pointer;
}
.filters button.active,
.filters button:hover {
  color: var(--riddle-text);
  border-color: rgba(139, 92, 246, 0.5);
}