:root {
  --bg: #ece7df;
  --ink: #1b1917;
  --muted: #5e564f;
  --panel: rgba(255, 250, 243, 0.88);
  --panel-border: rgba(27, 25, 23, 0.08);
  --accent: #7a4b2d;
  --shadow: 0 18px 60px rgba(52, 41, 30, 0.12);
  --radius: 24px;
  --font-display: "Iowan Old Style", "Palatino Linotype", "Book Antiqua", serif;
  --font-body: "Avenir Next", "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  font-family: var(--font-body);
  background:
    radial-gradient(circle at top left, rgba(122, 75, 45, 0.16), transparent 28%),
    radial-gradient(circle at bottom right, rgba(80, 92, 76, 0.14), transparent 24%),
    linear-gradient(180deg, #f6f1eb 0%, var(--bg) 100%);
}

.page-shell {
  width: min(1240px, calc(100vw - 32px));
  margin: 0 auto;
  padding: 36px 0 32px;
}

.hero {
  margin-bottom: 24px;
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--accent);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 0.78rem;
  font-weight: 700;
}

h1 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 5vw, 4.6rem);
  line-height: 0.95;
}

.subtitle {
  margin: 12px 0 0;
  max-width: 52rem;
  color: var(--muted);
  font-size: 1.05rem;
}

.content-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.9fr) minmax(280px, 0.9fr);
  gap: 20px;
}

.viewer-panel,
.info-card {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  backdrop-filter: blur(10px);
}

.viewer-panel {
  min-height: 68vh;
  padding: 18px;
  display: flex;
  flex-direction: column;
}

.viewer-state {
  margin: auto;
  max-width: 34rem;
  text-align: center;
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.6;
}

.viewer-frame-shell {
  flex: 1;
  min-height: 60vh;
  overflow: hidden;
  border-radius: 18px;
  border: 1px solid rgba(27, 25, 23, 0.08);
  background: #f8f4ee;
}

.viewer-frame-shell iframe {
  width: 100%;
  height: 100%;
  border: 0;
}

.side-panel {
  display: grid;
  gap: 16px;
}

.info-card {
  padding: 20px;
}

.info-card h2 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: 1.35rem;
}

.info-card p,
.info-card li {
  color: var(--muted);
  line-height: 1.6;
}

.info-card ul {
  margin: 0;
  padding-left: 18px;
}

.footer-note {
  margin-top: 18px;
  color: var(--muted);
  font-size: 0.95rem;
}

.hidden {
  display: none;
}

@media (max-width: 920px) {
  .content-grid {
    grid-template-columns: 1fr;
  }

  .viewer-panel {
    min-height: 56vh;
  }
}