/*
 * Castalia “Populi-adjacent” skin on top of imscc-pages output.
 * imscc-pages uses .imscc-header, .imscc-layout, .imscc-nav, .imscc-main.
 */
@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:ital,wght@0,400;0,500;0,600;0,700;1,400&display=swap');

:root {
  --populi-bg: #0f172a;
  --populi-panel: #1e293b;
  --populi-text: #f8fafc;
  --populi-muted: #94a3b8;
  --populi-accent: #38bdf8;
}

body {
  font-family: 'Plus Jakarta Sans', system-ui, sans-serif;
  margin: 0;
  background: #0b1220;
  color: var(--populi-text);
}

.imscc-header {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.35rem;
  background: linear-gradient(90deg, #0f172a 0%, #1e293b 100%);
  color: var(--populi-text);
  padding: 0.85rem 1.5rem;
  border-bottom: 1px solid rgba(148, 163, 184, 0.25);
  box-shadow: 0 1px 0 rgba(0, 0, 0, 0.35);
}

.imscc-header-subline {
  margin: 0;
  padding: 0;
  font-size: 0.82rem;
  font-weight: 500;
  line-height: 1.35;
  color: var(--populi-muted);
  letter-spacing: 0.02em;
  max-width: 48rem;
}

.imscc-header h1 {
  margin: 0;
  font-size: 1.1rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.imscc-header a {
  color: var(--populi-text);
  text-decoration: none;
}

.imscc-header a:hover {
  color: var(--populi-accent);
}

.imscc-layout {
  display: grid;
  grid-template-columns: minmax(240px, 280px) 1fr;
  min-height: calc(100vh - 52px);
}

.imscc-nav {
  background: var(--populi-panel);
  border-right: 1px solid rgba(148, 163, 184, 0.2);
  padding: 1.1rem 1rem 2rem;
  color: var(--populi-muted);
}

.imscc-nav-section h2 {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #64748b;
  margin: 1.25rem 0 0.5rem;
  font-weight: 600;
}

.imscc-nav-section:first-child h2 {
  margin-top: 0;
}

.imscc-nav ul {
  list-style: none;
  padding: 0;
  margin: 0 0 1rem;
}

.imscc-nav a {
  display: block;
  padding: 0.4rem 0.55rem;
  border-radius: 0.35rem;
  color: #cbd5e1;
  text-decoration: none;
  font-size: 0.88rem;
  font-weight: 500;
}

.imscc-nav a:hover {
  background: rgba(255, 255, 255, 0.06);
  color: #fff;
}

.imscc-main {
  background: #f8fafc;
  color: #0f172a;
  padding: 1.75rem 2.25rem;
  max-width: none;
}

.imscc-main h1 {
  font-size: 1.65rem;
  margin-top: 0;
}

.imscc-prose {
  max-width: 52rem;
  line-height: 1.65;
}

.imscc-frame {
  width: 100%;
  min-height: 70vh;
  border: 1px solid #e2e8f0;
  border-radius: 0.5rem;
  background: #fff;
}

@media (max-width: 900px) {
  .imscc-layout {
    grid-template-columns: 1fr;
  }
  .imscc-nav {
    border-right: none;
    border-bottom: 1px solid rgba(148, 163, 184, 0.2);
  }
}