:root {
  --page-bg: #3e2d18;
  --ratio: 1.5;
  --warm-light: 255, 242, 205;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: var(--page-bg);
}

body {
  display: grid;
  place-items: center;
  min-height: 100vh;
  font-family: Georgia, "Times New Roman", serif;
}

.stage {
  position: relative;
  width: min(100vw, calc(100vh * var(--ratio)));
  height: min(100vh, calc(100vw / var(--ratio)));
  max-width: 100vw;
  max-height: 100vh;
  overflow: hidden;
  isolation: isolate;
}

.stage > img {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: contain;
  user-select: none;
  -webkit-user-drag: none;
}

.hotspot {
  position: absolute;
  z-index: 10;
  display: block;
  border: 0;
  border-radius: 2px;
  text-decoration: none;
  cursor: pointer;
  outline: none;
  -webkit-tap-highlight-color: transparent;
}

.hotspot::before {
  content: "";
  position: absolute;
  inset: -7%;
  pointer-events: none;
  opacity: 0;
  background: radial-gradient(
    ellipse at center,
    rgba(var(--warm-light), 0.16) 0%,
    rgba(var(--warm-light), 0.08) 42%,
    rgba(var(--warm-light), 0) 75%
  );
  filter: blur(2px);
  transition: opacity 180ms ease;
}

.hotspot:hover::before,
.hotspot:focus-visible::before,
.hotspot:active::before {
  opacity: 1;
}

.nav-hotspot::after {
  content: "";
  position: absolute;
  left: 12%;
  right: 12%;
  bottom: 8%;
  height: 1px;
  pointer-events: none;
  background: rgba(var(--warm-light), 0.72);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform 180ms ease;
}

.nav-hotspot:hover::after,
.nav-hotspot:focus-visible::after,
.nav-hotspot:active::after {
  transform: scaleX(1);
}

.hotspot:focus-visible {
  outline: 1px solid rgba(var(--warm-light), 0.5);
  outline-offset: 2px;
}

.back-to-entree {
  position: absolute;
  z-index: 20;
  top: 1.1%;
  right: 1.1%;
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  color: rgba(246, 238, 219, 0.46);
  font-size: clamp(15px, 1.35vw, 21px);
  line-height: 1;
  letter-spacing: 0.08em;
  text-decoration: none;
  text-shadow:
    0 1px 2px rgba(0, 0, 0, 0.72),
    0 0 5px rgba(0, 0, 0, 0.35);
  opacity: 0.72;
  transition: color 160ms ease, opacity 160ms ease, text-shadow 160ms ease;
  outline: none;
  -webkit-tap-highlight-color: transparent;
}

.back-to-entree::before {
  content: "";
  position: absolute;
  inset: 8px;
  border-radius: 50%;
  background: rgba(var(--warm-light), 0.08);
  filter: blur(4px);
  opacity: 0;
  transition: opacity 160ms ease;
}

.back-to-entree:hover,
.back-to-entree:focus-visible,
.back-to-entree:active {
  color: rgba(255, 247, 228, 0.8);
  opacity: 0.95;
  text-shadow:
    0 1px 2px rgba(0, 0, 0, 0.78),
    0 0 7px rgba(var(--warm-light), 0.16);
}

.back-to-entree:hover::before,
.back-to-entree:focus-visible::before,
.back-to-entree:active::before {
  opacity: 1;
}

.back-to-entree:focus-visible {
  outline: 1px solid rgba(var(--warm-light), 0.42);
  outline-offset: -5px;
  border-radius: 50%;
}

.rotate-note {
  display: none;
  position: fixed;
  z-index: 50;
  left: 50%;
  bottom: max(10px, env(safe-area-inset-bottom));
  transform: translateX(-50%);
  padding: 5px 9px 6px;
  border-radius: 999px;
  color: rgba(247, 238, 217, 0.72);
  background: rgba(24, 18, 12, 0.42);
  box-shadow: 0 1px 6px rgba(0, 0, 0, 0.16);
  backdrop-filter: blur(3px);
  -webkit-backdrop-filter: blur(3px);
  font-size: 13px;
  line-height: 1.2;
  letter-spacing: 0.02em;
  white-space: nowrap;
  pointer-events: none;
}

@supports (height: 100dvh) {
  body {
    min-height: 100dvh;
  }

  .stage {
    width: min(100vw, calc(100dvh * var(--ratio)));
    height: min(100dvh, calc(100vw / var(--ratio)));
    max-height: 100dvh;
  }
}

@media (max-width: 820px) and (orientation: portrait) {
  .rotate-note {
    display: block;
  }

  .back-to-entree {
    top: 0.6%;
    right: 0.6%;
    font-size: 16px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .hotspot::before,
  .nav-hotspot::after,
  .back-to-entree,
  .back-to-entree::before {
    transition: none;
  }
}

/* Bibliothek: zwei im Bild integrierte, anklickbare Schilder */
.plaque-hotspot {
  border: 0;
  border-radius: 4px;
  background: transparent;
  box-shadow: none;
  transition: filter 220ms ease;
}

.plaque-hotspot::before {
  content: "";
  position: absolute;
  inset: 5%;
  border-radius: 3px;
  pointer-events: none;
  opacity: 0;
  background: radial-gradient(
    ellipse at center,
    rgba(255, 226, 190, 0.16) 0%,
    rgba(255, 226, 190, 0.07) 48%,
    rgba(255, 226, 190, 0) 82%
  );
  filter: blur(2px);
  transition: opacity 220ms ease;
}

.plaque-hotspot:hover,
.plaque-hotspot:focus-visible,
.plaque-hotspot:active {
  filter: brightness(1.06) saturate(1.03);
}

.plaque-hotspot:hover::before,
.plaque-hotspot:focus-visible::before,
.plaque-hotspot:active::before {
  opacity: 1;
}

/* Leseseiten hinter den drei Bibliotheksbereichen */
html.reading-page,
body.reading-page {
  min-height: 100%;
  height: auto;
  overflow: auto;
}

body.reading-page {
  display: block;
  color: #2f291f;
  background:
    linear-gradient(rgba(55, 47, 35, 0.92), rgba(55, 47, 35, 0.92)),
    #4a4031;
  font-family: Georgia, "Times New Roman", serif;
}

.reading-shell {
  width: min(920px, calc(100% - 34px));
  margin: clamp(24px, 5vw, 70px) auto;
  padding: clamp(28px, 5vw, 68px);
  background: #eee7d8;
  box-shadow: 0 12px 42px rgba(0, 0, 0, 0.28);
  border: 1px solid rgba(86, 69, 46, 0.22);
}

.reading-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 18px;
  margin-bottom: clamp(32px, 5vw, 60px);
  font-size: 14px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.reading-nav a {
  color: #66563e;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 160ms ease, border-color 160ms ease;
}

.reading-nav a:hover,
.reading-nav a:focus-visible {
  color: #2f291f;
  border-color: rgba(47, 41, 31, 0.38);
}

.reading-shell h1 {
  margin: 0 0 0.55em;
  color: #3b3328;
  font-size: clamp(30px, 5vw, 54px);
  font-weight: normal;
  line-height: 1.08;
  letter-spacing: 0.01em;
}

.reading-intro {
  max-width: 66ch;
  margin: 0 0 2.8em;
  color: #6a5d49;
  font-size: clamp(17px, 2vw, 21px);
  line-height: 1.65;
}

.content-slot {
  padding-top: 2em;
  border-top: 1px solid rgba(83, 68, 47, 0.24);
}

.content-slot h2 {
  margin: 0 0 0.6em;
  color: #443a2d;
  font-size: clamp(23px, 3vw, 32px);
  font-weight: normal;
}

.content-slot p {
  max-width: 72ch;
  margin: 0 0 1.25em;
  font-size: 18px;
  line-height: 1.75;
}

.placeholder-note {
  color: #7a6b56;
  font-style: italic;
}

@media (max-width: 620px) {
  .reading-shell {
    width: min(100% - 18px, 920px);
    margin: 9px auto;
    padding: 25px 21px 34px;
  }

  .reading-nav {
    align-items: flex-start;
    flex-direction: column;
    gap: 10px;
  }

  .content-slot p {
    font-size: 17px;
  }
}

/* Edition Hortensia: gemeinsame Buchseite */
body.edition-page {
  background:
    radial-gradient(circle at 12% 8%, rgba(200, 181, 142, 0.12), transparent 26%),
    linear-gradient(135deg, #40372c 0%, #302a23 100%);
}

.edition-shell {
  width: min(1120px, calc(100% - 34px));
  padding: clamp(28px, 5vw, 72px);
}

.edition-header {
  max-width: 790px;
  margin-bottom: clamp(46px, 7vw, 86px);
}

.edition-header .reading-intro {
  margin-bottom: 0;
}

.book-entry {
  display: grid;
  grid-template-columns: minmax(250px, 0.78fr) minmax(0, 1.22fr);
  gap: clamp(34px, 6vw, 82px);
  align-items: start;
  padding: clamp(8px, 2vw, 20px) 0 clamp(54px, 8vw, 94px);
}

.book-entry + .book-entry {
  padding-top: clamp(54px, 8vw, 94px);
  border-top: 1px solid rgba(83, 68, 47, 0.24);
}

.book-entry--reverse .book-visual {
  order: 2;
}

.book-entry--reverse .book-copy {
  order: 1;
}

.book-visual {
  display: grid;
  gap: 18px;
}

.book-cover {
  margin: 0;
  padding: clamp(10px, 1.5vw, 16px);
  background: rgba(255, 252, 245, 0.72);
  border: 1px solid rgba(84, 68, 45, 0.16);
  box-shadow: 0 15px 34px rgba(42, 31, 18, 0.18);
}

.book-cover img,
.book-atmosphere img {
  width: 100%;
  height: auto;
  display: block;
}

.book-atmosphere {
  margin: 0;
  overflow: hidden;
  border: 1px solid rgba(84, 68, 45, 0.16);
  box-shadow: 0 9px 24px rgba(42, 31, 18, 0.13);
}

.book-atmosphere img {
  aspect-ratio: 4 / 3;
  object-fit: cover;
}


.book-atmosphere--original {
  overflow: visible;
  background: rgba(255, 252, 245, 0.72);
  padding: 10px;
}

.book-atmosphere--original img {
  width: 100%;
  height: auto;
  aspect-ratio: auto;
  object-fit: contain;
  object-position: center top;
}

.book-atmosphere--wide img {
  aspect-ratio: 4 / 3;
  object-position: center;
}

.book-copy h2 {
  margin: 0 0 0.28em;
  color: #3b3328;
  font-size: clamp(29px, 4.2vw, 47px);
  font-weight: normal;
  line-height: 1.12;
}

.book-kicker {
  margin: 0 0 1.65em;
  color: #8a7659;
  font-size: 13px;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.book-description {
  margin: 0 0 2em;
  color: #3e372e;
  font-size: clamp(17px, 1.8vw, 19px);
  line-height: 1.76;
}

.book-meta {
  display: grid;
  grid-template-columns: max-content minmax(0, 1fr);
  gap: 7px 18px;
  margin: 0 0 1.8em;
  padding: 1.35em 0;
  border-top: 1px solid rgba(83, 68, 47, 0.21);
  border-bottom: 1px solid rgba(83, 68, 47, 0.21);
  color: #5e513f;
  font-size: 15px;
  line-height: 1.5;
}

.book-meta dt {
  font-weight: normal;
  color: #857259;
}

.book-meta dd {
  margin: 0;
}

.book-availability {
  margin: 0 0 1.35em;
  color: #4b4032;
  font-size: 16px;
  line-height: 1.6;
}

.book-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 11px;
}

.book-action {
  display: inline-flex;
  align-items: center;
  min-height: 42px;
  padding: 10px 15px;
  color: #f6efe2;
  background: #66563e;
  border: 1px solid #66563e;
  text-decoration: none;
  font-size: 13px;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  transition: background 160ms ease, color 160ms ease, border-color 160ms ease;
}

.book-action--secondary {
  color: #66563e;
  background: transparent;
  border-color: rgba(102, 86, 62, 0.52);
}

.book-action:hover,
.book-action:focus-visible {
  color: #fffaf1;
  background: #453a2c;
  border-color: #453a2c;
}

.book-action--secondary:hover,
.book-action--secondary:focus-visible {
  color: #453a2c;
  background: rgba(102, 86, 62, 0.08);
  border-color: #66563e;
}

.edition-footer-note {
  margin: 0;
  padding-top: 2em;
  border-top: 1px solid rgba(83, 68, 47, 0.24);
  color: #756650;
  font-size: 14px;
  line-height: 1.65;
}

@media (max-width: 760px) {
  .edition-shell {
    width: min(100% - 18px, 1120px);
    margin: 9px auto;
    padding: 25px 21px 38px;
  }

  .edition-header {
    margin-bottom: 44px;
  }

  .book-entry,
  .book-entry--reverse {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .book-entry--reverse .book-visual,
  .book-entry--reverse .book-copy {
    order: initial;
  }

  .book-visual {
    width: min(100%, 430px);
    margin: 0 auto;
  }

  .book-meta {
    grid-template-columns: 1fr;
    gap: 2px;
  }

  .book-meta dd + dt {
    margin-top: 8px;
  }

  .book-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .book-action {
    justify-content: center;
    text-align: center;
  }
}


/* Rezensionen und Buchbesprechungen */
.review-shell {
  width: min(1080px, calc(100% - 34px));
}

.review-header {
  max-width: 760px;
  margin-bottom: clamp(38px, 6vw, 72px);
}

.review-header .reading-intro {
  margin-bottom: 0;
}

.review-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(18px, 3vw, 30px);
}

.review-card {
  display: flex;
  flex-direction: column;
  min-height: 100%;
  padding: clamp(23px, 3vw, 34px);
  border: 1px solid rgba(83, 68, 47, 0.22);
  background: rgba(250, 246, 237, 0.5);
}

.review-card__author {
  margin: 0 0 0.75em;
  color: #8a7659;
  font-size: 13px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.review-card h2 {
  margin: 0 0 0.72em;
  color: #3b3328;
  font-size: clamp(24px, 3vw, 34px);
  font-weight: normal;
  line-height: 1.15;
}

.review-card__meta {
  margin: 0 0 1.4em;
  color: #76664f;
  font-size: 14px;
  line-height: 1.55;
}

.review-card__teaser {
  margin: 0 0 1.7em;
  color: #443b30;
  font-size: 16px;
  line-height: 1.7;
}

.review-card__link {
  align-self: flex-start;
  margin-top: auto;
  color: #655238;
  text-decoration: none;
  border-bottom: 1px solid rgba(101, 82, 56, 0.38);
  font-size: 13px;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  transition: color 160ms ease, border-color 160ms ease;
}

.review-card__link:hover,
.review-card__link:focus-visible {
  color: #342b20;
  border-color: #342b20;
}

.review-article {
  width: min(860px, calc(100% - 34px));
}

.review-book-head {
  margin-bottom: clamp(36px, 6vw, 66px);
  padding-bottom: clamp(28px, 4vw, 42px);
  border-bottom: 1px solid rgba(83, 68, 47, 0.24);
}

.review-book-head h1 {
  max-width: 18ch;
  margin-bottom: 0.38em;
}

.review-book-author {
  margin: 0 0 1.15em;
  color: #685944;
  font-size: clamp(19px, 2.3vw, 24px);
}

.review-biblio {
  margin: 0;
  color: #85735a;
  font-size: 15px;
  line-height: 1.65;
}

.review-text {
  max-width: 72ch;
}

.review-text p {
  margin: 0 0 1.45em;
  color: #342e26;
  font-size: clamp(17px, 1.8vw, 19px);
  line-height: 1.82;
  hyphens: auto;
}

.review-bottom-nav {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  margin-top: clamp(44px, 7vw, 76px);
  padding-top: 24px;
  border-top: 1px solid rgba(83, 68, 47, 0.24);
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.review-bottom-nav a {
  color: #66563e;
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

.review-bottom-nav a:hover,
.review-bottom-nav a:focus-visible {
  color: #2f291f;
  border-color: rgba(47, 41, 31, 0.38);
}

@media (max-width: 760px) {
  .review-grid {
    grid-template-columns: 1fr;
  }

  .review-card {
    padding: 24px 22px 27px;
  }

  .review-article {
    width: min(100% - 18px, 860px);
  }

  .review-bottom-nav {
    flex-direction: column;
  }
}

/* Historische Forschung: Aktivierungspunkt und Einblendung */
.research-trigger {
  position: absolute;
  z-index: 26;
  width: clamp(17px, 1.9vw, 24px);
  height: clamp(17px, 1.9vw, 24px);
  border-radius: 50%;
  border: 1px solid rgba(248, 211, 179, 0.78);
  background: rgba(201, 101, 36, 0.92);
  box-shadow:
    0 0 0 2px rgba(108, 52, 18, 0.18),
    0 0 12px rgba(201, 101, 36, 0.25);
  cursor: pointer;
  transform: translate(-50%, -50%);
  transition: transform 160ms ease, box-shadow 160ms ease, background 160ms ease;
}

.research-trigger::before {
  content: "";
  position: absolute;
  inset: -6px;
  border-radius: 50%;
  background: rgba(201, 101, 36, 0.10);
  opacity: 0.72;
}

.research-trigger:hover,
.research-trigger:focus-visible,
.research-trigger[aria-expanded="true"] {
  background: rgba(214, 112, 45, 0.98);
  box-shadow:
    0 0 0 2px rgba(108, 52, 18, 0.20),
    0 0 16px rgba(214, 112, 45, 0.34);
  transform: translate(-50%, -50%) scale(1.06);
}

.research-card {
  position: absolute;
  z-index: 27;
  width: min(22vw, 190px);
  min-width: 150px;
  max-width: 190px;
  transform: translate(0, 0);
}

.research-card-link {
  position: relative;
  display: block;
  padding: 12px 14px 13px;
  color: #3e3327;
  text-decoration: none;
  background: rgba(241, 233, 217, 0.97);
  border: 1px solid rgba(103, 81, 55, 0.20);
  box-shadow: 0 8px 20px rgba(49, 35, 20, 0.14);
}

.research-card-link::after {
  content: "";
  position: absolute;
  right: 20px;
  bottom: -7px;
  width: 12px;
  height: 12px;
  background: rgba(241, 233, 217, 0.97);
  border-right: 1px solid rgba(103, 81, 55, 0.20);
  border-bottom: 1px solid rgba(103, 81, 55, 0.20);
  transform: rotate(45deg);
}

.research-card-link strong {
  display: block;
  font-size: clamp(15px, 1.26vw, 18px);
  line-height: 1.22;
  font-weight: normal;
}

.research-card-kicker {
  display: block;
  margin-bottom: 0.45em;
  color: #75624c;
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.research-card-link:hover,
.research-card-link:focus-visible {
  background: rgba(246, 239, 225, 0.99);
}

.research-card-link:hover::after,
.research-card-link:focus-visible::after {
  background: rgba(246, 239, 225, 0.99);
}

@media (max-width: 760px) {
  .research-trigger {
    width: 21px;
    height: 21px;
  }

  .research-card {
    width: min(42vw, 190px);
    min-width: 150px;
  }

  .research-card-link {
    padding: 11px 12px 12px;
  }

  .research-card-link strong {
    font-size: 16px;
  }
}


/* Kabinett: das ganze Raumbild führt zum Text */
.room-link {
  position: absolute;
  z-index: 1;
  inset: 0;
  display: block;
  overflow: hidden;
  cursor: pointer;
  text-decoration: none;
  outline: none;
  -webkit-tap-highlight-color: transparent;
}

.room-link > img {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: contain;
  user-select: none;
  -webkit-user-drag: none;
  transition: filter 180ms ease;
}

.room-link:hover > img,
.room-link:focus-visible > img {
  filter: brightness(1.018);
}

.room-link:focus-visible {
  outline: 1px solid rgba(var(--warm-light), 0.42);
  outline-offset: -5px;
}

/* Textseite des Kabinetts */
body.kabinett-reading-page {
  background:
    radial-gradient(circle at 14% 10%, rgba(212, 168, 93, 0.13), transparent 28%),
    linear-gradient(135deg, #4d4436 0%, #332d27 100%);
}

.kabinett-shell {
  width: min(900px, calc(100% - 34px));
}

.kabinett-text {
  max-width: 74ch;
}

.kabinett-text h1 {
  margin-bottom: 0.9em;
}

.kabinett-text p {
  margin: 0 0 1.45em;
  color: #373027;
  font-size: clamp(17px, 1.75vw, 19px);
  line-height: 1.78;
}

@media (max-width: 620px) {
  .kabinett-shell {
    width: min(100% - 18px, 900px);
  }

  .kabinett-text p {
    font-size: 17px;
    line-height: 1.72;
  }
}

@media (prefers-reduced-motion: reduce) {
  .room-link > img {
    transition: none;
  }
}


/* Formale Ebene im Entrée: bewusst sehr diskret */
.legal-link {
  position: fixed;
  z-index: 40;
  left: max(18px, 2.2vw);
  bottom: max(13px, 1.7vh);
  color: rgba(241, 229, 207, 0.48);
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(14px, 1.02vw, 16px);
  line-height: 1;
  letter-spacing: 0.045em;
  text-decoration: none;
  transition: color 160ms ease;
  -webkit-tap-highlight-color: transparent;
}

.legal-link:hover,
.legal-link:focus-visible {
  color: rgba(250, 241, 222, 0.78);
  outline: none;
}

@media (max-width: 820px) {
  .legal-link {
    left: max(10px, env(safe-area-inset-left));
    bottom: max(8px, env(safe-area-inset-bottom));
    font-size: 11px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .legal-link {
    transition: none;
  }
}