/* Parchment, wood, and clothbound green for a quiet personal reading room. */
.knowledge-view {
  --theme-bg: #f5f0e7;
  --theme-surface: #fcf9f2;
  --theme-surface-soft: #eee7da;
  --theme-text: #342e27;
  --theme-muted: #706456;
  --theme-line: #d9cebd;
  --theme-accent: #56634a;
  --theme-accent-strong: #3f4f36;
  --theme-focus: rgba(66, 95, 72, 0.38);
  --theme-navbar: rgba(245, 240, 231, 0.96);
  --reading-room-shadow: 0 16px 40px -20px rgba(75, 53, 30, 0.25);
  --knowledge-serif: "Instrument Serif", Georgia, serif;
  min-height: 100vh;
  padding-bottom: 0;
  background: radial-gradient(ellipse at 85% 0, rgba(203, 172, 123, 0.10), transparent 55%), var(--theme-bg);
  color: var(--theme-text);
  font-family: "DM Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
}
:root[data-theme="dark"] .knowledge-view {
  --theme-bg: #211e19;
  --theme-surface: #302a23;
  --theme-surface-soft: #302a23;
  --theme-text: #eee4d4;
  --theme-muted: #b9ab96;
  --theme-line: #4b4134;
  --theme-accent: #b5bfa2;
  --theme-accent-strong: #c5cfb3;
  --theme-focus: rgba(171, 191, 168, 0.6);
  --theme-navbar: rgba(33, 30, 25, 0.96);
  --reading-room-shadow: 0 18px 40px -16px rgba(0, 0, 0, 0.45);
}
.knowledge-view #navbar {
  padding: 18px 32px;
  border: 0;
  background: var(--theme-navbar) !important;
  backdrop-filter: blur(16px);
  box-shadow: none;
  font-weight: 400;
}
.knowledge-view #navbar .container-fluid { max-width: 1184px; }
.knowledge-view #navbar .navbar-brand { margin-right: 32px; color: var(--theme-text) !important; font: 500 1rem/1.5 "DM Sans", sans-serif; letter-spacing: -0.035em; }
.knowledge-view #navbar .knowledge-home,
.knowledge-view #navbar .theme-toggle { min-width: 48px; min-height: 44px; width: auto; height: auto; padding: 8px; border: 0; border-radius: 0; background: transparent; color: var(--theme-muted); font: 400 0.78rem/1.5 "DM Sans", sans-serif; transform: none; }
.knowledge-view #navbar .theme-toggle { flex-basis: auto; margin-left: auto; order: 2; }
.knowledge-view #navbar .knowledge-home { display: inline-flex; align-items: center; justify-content: center; margin-left: 8px; order: 3; color: var(--theme-muted) !important; }
.knowledge-view #navbar .knowledge-home:hover { color: var(--theme-text) !important; text-decoration: underline; }
.knowledge-view #navbar .theme-toggle:hover { color: var(--theme-text); }
.theme-label-dark, :root[data-theme="dark"] .theme-label-light { display: none; }
:root[data-theme="dark"] .theme-label-dark { display: inline; }
.knowledge-page, .knowledge-footer > div { width: min(1120px, calc(100% - 80px)); margin: 0 auto; }
.knowledge-page section { scroll-margin-top: 112px; }
.knowledge-skip-link { position: fixed; top: -80px; left: 20px; z-index: 1100; padding: 12px 18px; background: var(--theme-surface); color: var(--theme-text); border: 1px solid var(--theme-line); }
.knowledge-skip-link:focus { top: 8px; }
.knowledge-view a:focus-visible,
.knowledge-view button:focus-visible,
.knowledge-view video:focus-visible { outline: 3px solid var(--theme-focus); outline-offset: 5px; }
.knowledge-view a { text-underline-offset: 5px; text-decoration-thickness: 1px; }

.knowledge-intro { display: grid; grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr); gap: 72px; align-items: center; margin: 0 auto; padding: 44px 0 76px; }
.reading-room-copy { padding: 12px 0; }
.reading-room-figure { width: 100%; max-width: 390px; margin: 0; justify-self: end; padding: 9px; border: 1px solid var(--theme-line); background: var(--theme-surface); box-shadow: var(--reading-room-shadow); }
.reading-room-figure img { display: block; width: 100%; height: auto; aspect-ratio: 4 / 5; object-fit: cover; }
:root[data-theme="dark"] .reading-room-figure img { filter: brightness(0.88) saturate(0.85); }
.knowledge-eyebrow { margin: 0 0 22px; color: var(--theme-muted); font-size: 0.8rem; font-weight: 400; line-height: 1.5; letter-spacing: 0.015em; }
.knowledge-intro h1 { margin: 0; color: var(--theme-text); font: 400 clamp(3.3rem, 6.5vw, 5.5rem)/1.02 var(--knowledge-serif); letter-spacing: -0.025em; }
.knowledge-intro h1 em { color: var(--theme-accent-strong); font-weight: 400; }
.knowledge-intro-copy { max-width: 470px; margin: 28px 0 0; color: var(--theme-muted); font-size: 1rem; line-height: 1.85; text-wrap: pretty; }
.knowledge-index { display: flex; flex-wrap: wrap; gap: 8px 32px; margin-top: 22px; }
.knowledge-index a { display: inline-flex; align-items: center; min-height: 44px; color: var(--theme-text); font-size: 0.8rem; text-decoration: underline; text-decoration-color: var(--theme-line); text-underline-offset: 6px; }
.knowledge-index a:hover { text-decoration-color: var(--theme-text); }

.knowledge-films { padding: 30px 0 76px; border-top: 1px solid var(--theme-line); }
.knowledge-section-heading { display: flex; align-items: baseline; justify-content: space-between; gap: 24px; margin-bottom: 30px; }
.knowledge-section-heading h2 { margin: 0; color: var(--theme-text); font: 400 2rem/1.2 var(--knowledge-serif); letter-spacing: -0.015em; }
.knowledge-section-heading > p { margin: 0; color: var(--theme-muted); font-size: 0.78rem; }
.film-collection { display: grid; gap: 72px; }
.learning-film { display: grid; grid-template-columns: minmax(0, 1.9fr) minmax(0, 1fr); gap: 54px; align-items: center; }
.film-media { position: relative; overflow: hidden; aspect-ratio: 16 / 9; border-radius: 1px; background: #050b0c; isolation: isolate; box-shadow: 0 0 0 7px var(--theme-surface), 0 0 0 8px var(--theme-line), var(--reading-room-shadow); }
.film-media:focus-within { outline: 3px solid var(--theme-focus); outline-offset: 5px; }
.film-media video { display: block; width: 100%; height: 100%; object-fit: contain; }
.film-play { position: absolute; left: 24px; bottom: 24px; z-index: 1; min-height: 44px; padding: 12px 23px; border: 1px solid #e6dccb; border-radius: 1px; background: #f7f1e5; color: #342e27; font: 500 0.8rem/1.4 "DM Sans", sans-serif; cursor: pointer; transition: background 160ms ease, transform 160ms ease; }
.film-play:hover { background: #fff; transform: translateY(-2px); }
.film-play[hidden] { display: none; }
.film-copy { min-width: 0; }
.film-duration { margin: 0 0 18px; color: var(--theme-muted); font-size: 0.74rem; font-variant-numeric: tabular-nums; }
.learning-film h3 { margin: 0 0 20px; color: var(--theme-text); font: 400 clamp(2.3rem, 3.5vw, 3rem)/1.04 var(--knowledge-serif); letter-spacing: -0.015em; }
.film-description { margin: 0 0 22px; color: var(--theme-muted); font-size: 0.91rem; line-height: 1.8; text-wrap: pretty; }
.film-project { display: inline-flex; align-items: center; min-height: 44px; color: var(--theme-text); font-size: 0.8rem; text-decoration: underline; text-decoration-color: var(--theme-line); text-underline-offset: 6px; }
.film-project:hover { color: var(--theme-accent-strong); text-decoration-color: currentColor; }
.film-error { margin: 16px 0 0; color: var(--theme-text); font-size: 0.83rem; line-height: 1.7; }
.film-error a { color: var(--theme-accent-strong); text-decoration: underline; }

.knowledge-notes { display: grid; grid-template-columns: 1.2fr 1fr; gap: 80px; align-items: center; padding: 52px 0; border-top: 1px solid var(--theme-line); }
.knowledge-notes .knowledge-eyebrow { margin-bottom: 16px; }
.knowledge-notes h2 { margin: 0; color: var(--theme-text); font: 400 3rem/1.08 var(--knowledge-serif); letter-spacing: -0.015em; }
.notes-empty { max-width: 350px; justify-self: end; }
.notes-empty p { margin: 0 0 14px; color: var(--theme-muted); font-size: 0.95rem; line-height: 1.8; }
.notes-empty .notes-status { margin: 0; font-size: 0.8rem; }
.knowledge-closing { display: flex; justify-content: space-between; align-items: center; gap: 24px; padding: 10px 0 60px; }
.knowledge-closing p { margin: 0; color: var(--theme-muted); font-size: 0.84rem; }
.knowledge-closing a { padding: 10px 0; color: var(--theme-text); font-size: 0.84rem; text-decoration: underline; text-decoration-color: var(--theme-line); }
.knowledge-closing a:hover { text-decoration-color: currentColor; }
.knowledge-view .knowledge-footer { position: static; height: auto; padding: 26px 0; border-top: 1px solid var(--theme-line); background: var(--theme-bg); color: var(--theme-muted); font-size: 0.75rem; }
.knowledge-footer > div { display: flex; justify-content: space-between; gap: 24px; }
.knowledge-footer a { color: var(--theme-muted); }
.knowledge-footer a:hover { color: var(--theme-text); text-decoration: underline; }

/* The Markdown reader shares the typography and restrained palette. */
.knowledge-note { width: min(720px, calc(100% - 80px)); min-height: calc(100vh - 150px); margin: 0 auto; padding: 60px 0 80px; }
.knowledge-note > a { display: inline-block; margin-bottom: 46px; color: var(--theme-muted); font-size: 0.8rem; }
.knowledge-note h1 { margin: 0 0 22px; color: var(--theme-text); font: 400 clamp(3rem, 6vw, 4.5rem)/1.05 var(--knowledge-serif); letter-spacing: -0.015em; }
.knowledge-note header { margin-bottom: 42px; padding-bottom: 32px; border-bottom: 1px solid var(--theme-line); }
.knowledge-note header > p:not(.knowledge-eyebrow) { color: var(--theme-muted); line-height: 1.8; }
.knowledge-note time { color: var(--theme-muted); font-size: 0.8rem; }
.note-prose { color: var(--theme-text); font-family: Georgia, "Times New Roman", serif; font-size: 1.1rem; line-height: 1.9; overflow-wrap: break-word; }
.note-prose h2, .note-prose h3, .note-prose h4 { margin: 1.6em 0 0.6em; color: var(--theme-text); font-family: var(--knowledge-serif); font-weight: 400; line-height: 1.2; }
.note-prose h2 { font-size: 2.5rem; }
.note-prose h3 { font-size: 2rem; }
.note-prose h4 { font-size: 1.6rem; }
.note-prose p, .note-prose ul, .note-prose ol { margin-bottom: 1.2em; }
.note-prose a { color: var(--theme-accent-strong); text-decoration: underline; }
.note-prose img, .note-prose video { max-width: 100%; height: auto; }
.note-prose pre { padding: 20px; overflow-x: auto; background: var(--theme-surface-soft); color: var(--theme-text); border: 1px solid var(--theme-line); border-radius: 3px; font-size: 0.85rem; }
.note-prose code { color: var(--theme-accent-strong); }
.note-prose pre code { color: inherit; }
.note-prose blockquote { margin: 28px 0; padding: 6px 24px; border-left: 2px solid var(--theme-line); color: var(--theme-muted); }
.note-prose blockquote p:last-child { margin-bottom: 0; }
.note-prose table { display: block; max-width: 100%; overflow-x: auto; margin: 24px 0; }
.note-prose th, .note-prose td { padding: 10px 14px; border: 1px solid var(--theme-line); }
.note-prose th { background: var(--theme-surface-soft); }
.note-prose hr { margin: 36px 0; border-color: var(--theme-line); }
.note-list { margin: 0; padding: 0; list-style: none; }
.note-list li { padding: 20px 0; border-bottom: 1px solid var(--theme-line); }
.note-list a { color: var(--theme-text); font: 400 1.9rem/1.2 var(--knowledge-serif); }
.note-list p { margin: 8px 0 0; color: var(--theme-muted); font-size: 0.9rem; line-height: 1.7; }

@media (max-width: 1000px) {
  .knowledge-intro { gap: 40px; }
  .learning-film { grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr); gap: 32px; }
  .film-description { font-size: 0.86rem; }
  .knowledge-notes { gap: 40px; }
}
@media (max-width: 767.98px) {
  .knowledge-view #navbar { padding: 10px 20px; }
  .knowledge-view #navbar .navbar-brand { margin-right: 16px; }
  .knowledge-page, .knowledge-footer > div, .knowledge-note { width: calc(100% - 40px); }
  .knowledge-intro { grid-template-columns: 1fr; gap: 32px; padding: 34px 0 48px; }
  .reading-room-copy { padding: 0; text-align: center; }
  .reading-room-figure { justify-self: center; max-width: 420px; }
  .reading-room-figure img { aspect-ratio: 5 / 4; object-position: 50% 68%; }
  .knowledge-eyebrow { margin-bottom: 20px; font-size: 0.76rem; }
  .knowledge-intro h1 { font-size: clamp(3.3rem, 10.5vw, 5rem); }
  .knowledge-intro-copy { max-width: 460px; margin: 24px auto 0; font-size: 0.92rem; line-height: 1.8; }
  .knowledge-index { justify-content: center; margin-top: 16px; }
  .knowledge-section-heading { align-items: flex-start; flex-direction: column; gap: 9px; margin-bottom: 24px; }
  .knowledge-section-heading h2 { font-size: 1.9rem; }
  .knowledge-films { padding: 28px 0 52px; }
  .film-collection { gap: 48px; }
  .learning-film { grid-template-columns: 1fr; gap: 24px; }
  .film-play { left: 16px; bottom: 16px; padding: 10px 18px; }
  .film-duration { margin-bottom: 12px; }
  .learning-film h3 { margin-bottom: 14px; font-size: 2.5rem; }
  .learning-film h3 br { display: none; }
  .film-description { max-width: 520px; margin-bottom: 12px; font-size: 0.93rem; }
  .knowledge-notes { grid-template-columns: 1fr; gap: 24px; padding: 42px 0; }
  .knowledge-notes h2 { font-size: 2.15rem; }
  .notes-empty { max-width: none; justify-self: start; }
  .knowledge-closing { padding: 4px 0 42px; }
  .knowledge-closing p, .knowledge-closing a { font-size: 0.78rem; }
  .knowledge-note { padding-top: 38px; }
}
@media (max-width: 359px) {
  .knowledge-intro h1 { font-size: 2.9rem; }
  .knowledge-closing { align-items: flex-start; flex-direction: column; gap: 6px; }
}
@media (prefers-reduced-motion: reduce) {
  .film-play { transition: none; }
  .film-play:hover { transform: none; }
}