.shell--wide { max-width: 1180px; }

.material-catalogue {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 16px;
  margin-top: 26px;
}

.material-catalogue-card,
.material-reader,
.material-gate {
  border: 2px solid var(--ink);
  border-radius: var(--radius);
  background: var(--white);
  box-shadow: 0 18px 40px rgba(16, 36, 45, 0.08);
}

.material-catalogue-card { padding: 22px; }
.material-catalogue-card h2 { margin: 8px 0; color: var(--ink); font-family: var(--display); font-size: 1.35rem; }
.material-catalogue-card p { min-height: 48px; margin: 0 0 15px; color: var(--ink-soft); line-height: 1.5; }
.material-eyebrow { color: var(--ink-soft); font-size: .72rem; font-weight: 800; letter-spacing: .09em; text-transform: uppercase; }
.material-folder-label { display: block; margin-top: 8px; color: var(--brand-dark, var(--ink)); font-size: .78rem; font-weight: 800; }
.material-catalogue-meta { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 18px; color: var(--ink-soft); font-size: .82rem; font-weight: 700; }
.material-catalogue-link,
.material-back-link { color: var(--ink); font-weight: 800; text-decoration-thickness: 2px; text-underline-offset: 3px; }
.material-note,
.material-error { padding: 18px 20px; border-radius: 14px; background: var(--paper); color: var(--ink-soft); line-height: 1.5; }
.material-error { color: #a52a2a; background: #fff0f0; }

.material-reader { padding: clamp(18px, 3vw, 30px); margin-top: 20px; }
.material-reader-header { display: flex; justify-content: space-between; gap: 24px; align-items: flex-start; }
.material-reader-header h1 { margin: 6px 0; color: var(--ink); font-family: var(--display); font-size: clamp(1.5rem, 4vw, 2.3rem); letter-spacing: -.03em; }
.material-reader-header p { max-width: 680px; margin: 0; color: var(--ink-soft); line-height: 1.5; }
.material-reader-toolbar { display: flex; align-items: center; flex-wrap: wrap; gap: 8px; padding: 12px; margin: 22px 0 14px; border: 1px solid var(--line); border-radius: 14px; background: var(--paper); color: var(--ink-soft); font-size: .9rem; font-weight: 700; }
.material-reader-toolbar button { padding: 8px 11px; border: 1px solid var(--ink); border-radius: 999px; color: var(--ink); background: var(--white); font: inherit; cursor: pointer; }
.material-reader-toolbar button:hover { background: var(--brand); }
.material-reader-toolbar button:disabled { opacity: .45; cursor: not-allowed; }
.material-reader-divider { width: 1px; height: 24px; margin: 0 4px; background: var(--line); }
.material-page-stage { position: relative; display: flex; justify-content: center; min-height: 420px; padding: 18px; overflow: auto; isolation: isolate; border: 1px solid var(--line); border-radius: 14px; background: #e9eef0; }
.material-page-stage__content { display: flex; flex: 1 1 auto; min-width: 100%; justify-content: center; }
.material-page-frame { display: flex; flex-direction: column; align-items: center; max-width: 100%; margin: 0; }
.material-page-frame img { display: block; max-width: none; height: auto; border: 1px solid #c4cdd0; box-shadow: 0 10px 30px rgba(16, 36, 45, .18); background: white; user-select: none; }
.material-page-frame figcaption { padding: 9px 0 0; color: var(--ink-soft); font-size: .8rem; }
.material-reader-progress { height: 8px; margin-top: 16px; overflow: hidden; border-radius: 99px; background: var(--line); }
.material-reader-progress span { display: block; height: 100%; border-radius: inherit; background: var(--brand); transition: width .2s ease; }
.material-reader-hint { margin: 10px 0 0; color: var(--ink-soft); font-size: .84rem; }
.material-gate { display: flex; justify-content: space-between; align-items: center; gap: 22px; padding: 20px; margin-top: 20px; border-color: var(--brand-dark, var(--ink)); background: #f5fbfd; }
.material-gate--overlay { position: absolute; z-index: 4; inset: 0; display: grid; max-width: none; place-content: center; place-items: center; padding: clamp(24px, 6vw, 64px); margin: 0; overflow: auto; border: 0; border-radius: inherit; color: var(--white); text-align: center; background: rgba(16, 36, 45, .86); backdrop-filter: blur(4px); -webkit-backdrop-filter: blur(4px); }
.material-gate--overlay > div { max-width: 560px; }
.material-page-stage .material-gate--overlay .material-eyebrow { color: inherit; }
.material-page-stage .material-gate--overlay h2,
.material-page-stage .material-gate--overlay p { color: inherit; }
.material-page-stage .material-gate--overlay h2 { font-size: clamp(1.5rem, 3vw, 2.25rem); }
.material-page-stage .material-gate--overlay p { max-width: 560px; }
.material-page-stage .material-gate--overlay .material-gate-button { justify-self: center; color: #fff; }
.material-gate h2 { margin: 5px 0; color: var(--ink); font-family: var(--display); font-size: 1.3rem; }
.material-gate p { max-width: 620px; margin: 0; color: var(--ink-soft); line-height: 1.5; }
.material-gate-button { flex: 0 0 auto; padding: 12px 16px; border: 2px solid var(--ink); border-radius: 999px; color: var(--ink); background: var(--brand); font-weight: 800; text-decoration: none; }

.material-detail {
  max-width: 860px;
  padding: clamp(24px, 5vw, 50px);
  margin: 24px auto 0;
  border: 2px solid var(--ink);
  border-radius: var(--radius);
  background: var(--white);
  box-shadow: 0 18px 40px rgba(16, 36, 45, 0.08);
}

.material-detail h1 { max-width: 720px; margin: 8px 0 14px; color: var(--ink); font-family: var(--display); font-size: clamp(2rem, 6vw, 3.6rem); letter-spacing: -.045em; line-height: 1.02; }
.material-detail-description { max-width: 680px; margin: 0; color: var(--ink-soft); font-size: 1.05rem; line-height: 1.65; }
.material-detail-path { display: flex; flex-wrap: wrap; gap: 8px; padding: 0; margin: 22px 0 0; color: var(--ink-soft); font-size: .82rem; font-weight: 700; list-style: none; }
.material-detail-path li + li::before { padding-right: 8px; content: "/"; color: var(--line); }
.material-detail-meta { display: flex; flex-wrap: wrap; gap: 10px 20px; padding: 20px 0; margin: 26px 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); color: var(--ink-soft); font-size: .88rem; font-weight: 700; }
.material-detail-actions { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }
.material-detail-button { display: inline-flex; padding: 12px 17px; border: 2px solid var(--ink); border-radius: 999px; color: var(--ink); background: var(--brand); font-weight: 800; text-decoration: none; }
.material-detail-button:hover { background: var(--sun); }
.material-detail-back { color: var(--ink); font-weight: 800; text-decoration-thickness: 2px; text-underline-offset: 3px; }
.material-detail-note { margin: 22px 0 0; color: var(--ink-soft); font-size: .84rem; line-height: 1.5; }

@media (max-width: 680px) {
  .material-reader-header,
  .material-gate { flex-direction: column; }
  .material-gate-button { width: 100%; text-align: center; }
  .material-page-stage { min-height: 300px; padding: 10px; }
}

@media (prefers-reduced-motion: reduce) {
  .material-reader-progress span { transition: none; }
}