/* ============================================================
   INSIDE THE HOUSE — CHAPTER
   Standalone, isolated stylesheet. All selectors scoped under
   .inside-house-section and prefixed "inside-house-". No bare
   element selectors — cannot leak into or collide with production
   styles, or with the separate .house-section chapter's CSS.

   INTERACTION MODEL: a hidden native radio group drives which
   "room" panel is visible, using :checked ~ sibling selectors.
   This means the whole section works with JavaScript fully
   disabled — inside-house.js only adds a live-region announcement
   as a progressive enhancement, never the core mechanism.
   ============================================================ */

.inside-house-section {
  --inside-house-ink: #0A0908;
  --inside-house-panel: #16140F;
  --inside-house-ivory: #F5F3EF;
  --inside-house-gold: #C9A24B;
  --inside-house-gold-muted: #8C763F;
  --inside-house-grey: #8A8782;

  --inside-house-serif: "Fraunces", "Iowan Old Style", "Georgia", serif;
  --inside-house-sans: "Inter", -apple-system, "Helvetica Neue", Arial, sans-serif;
  --inside-house-mono: "IBM Plex Mono", ui-monospace, "SFMono-Regular", monospace;

  --inside-house-unit: 8px;
  --inside-house-edge: clamp(24px, 6vw, 96px);

  position: relative;
  background: var(--inside-house-ink);
  color: var(--inside-house-ivory);
  font-family: var(--inside-house-sans);
  overflow: hidden;
  isolation: isolate;
}

.inside-house-section *,
.inside-house-section *::before,
.inside-house-section *::after {
  box-sizing: border-box;
}

/* ---------------------------------------------------------------
   HEADER BAND
   --------------------------------------------------------------- */

.inside-house-header {
  padding: calc(var(--inside-house-unit) * 9) var(--inside-house-edge) calc(var(--inside-house-unit) * 6);
  max-width: 62ch;
}

.inside-house-kicker {
  font-family: var(--inside-house-mono);
  font-size: 12px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--inside-house-gold);
  margin: 0 0 calc(var(--inside-house-unit) * 2.5);
}

.inside-house-headline {
  font-family: var(--inside-house-serif);
  font-weight: 500;
  font-size: clamp(30px, 3.2vw, 50px);
  line-height: 1.12;
  letter-spacing: -0.01em;
  margin: 0 0 calc(var(--inside-house-unit) * 2.5);
}

.inside-house-headline em {
  font-style: normal;
  color: var(--inside-house-grey);
}

.inside-house-lead {
  font-size: 16px;
  line-height: 1.6;
  color: rgba(245, 243, 239, 0.72);
  max-width: 52ch;
  margin: 0;
}

/* ---------------------------------------------------------------
   RADIO GROUP — visually hidden, not display:none. Standard
   accessible-hide technique: stays focusable and keyboard-operable,
   and screen readers still announce it as a radio group.
   --------------------------------------------------------------- */

.inside-house-radio {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ---------------------------------------------------------------
   DIRECTORY — the floor-directory list of five divisions.
   --------------------------------------------------------------- */

.inside-house-grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(320px, 34%) 1fr;
  min-height: 560px;
  border-top: 1px solid rgba(201, 162, 75, 0.16);
}

.inside-house-directory {
  border: 0;
  margin: 0;
  padding: 0;
  border-right: 1px solid rgba(201, 162, 75, 0.16);
}

.inside-house-directory-legend {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.inside-house-item {
  position: relative;
  border-bottom: 1px solid rgba(201, 162, 75, 0.12);
}

.inside-house-item:last-child {
  border-bottom: none;
}

.inside-house-item-button {
  display: flex;
  align-items: baseline;
  gap: calc(var(--inside-house-unit) * 2.5);
  width: 100%;
  cursor: pointer;
  padding: calc(var(--inside-house-unit) * 3.5) calc(var(--inside-house-unit) * 4) calc(var(--inside-house-unit) * 3.5) calc(var(--inside-house-unit) * 3.5);
  border-left: 2px solid transparent;
  transition: border-color 0.5s ease, padding-left 0.5s ease, background 0.5s ease;
}

.inside-house-item-number {
  font-family: var(--inside-house-mono);
  font-size: 12px;
  color: var(--inside-house-grey);
  transition: color 0.5s ease;
}

.inside-house-item-name {
  font-family: var(--inside-house-serif);
  font-size: 22px;
  color: rgba(245, 243, 239, 0.5);
  transition: color 0.5s ease;
}

.inside-house-item-button:hover .inside-house-item-name {
  color: rgba(245, 243, 239, 0.8);
}

/* ---- Active-row styling, driven purely by :checked state ---- */

#inside-house-tab-aviation:checked ~ .inside-house-directory label[data-for="aviation"],
#inside-house-tab-membership:checked ~ .inside-house-directory label[data-for="membership"],
#inside-house-tab-concierge:checked ~ .inside-house-directory label[data-for="concierge"],
#inside-house-tab-advisory:checked ~ .inside-house-directory label[data-for="advisory"],
#inside-house-tab-culture:checked ~ .inside-house-directory label[data-for="culture"] {
  border-left-color: var(--inside-house-gold);
  padding-left: calc(var(--inside-house-unit) * 5);
  background: rgba(201, 162, 75, 0.05);
}

#inside-house-tab-aviation:checked ~ .inside-house-directory label[data-for="aviation"] .inside-house-item-number,
#inside-house-tab-membership:checked ~ .inside-house-directory label[data-for="membership"] .inside-house-item-number,
#inside-house-tab-concierge:checked ~ .inside-house-directory label[data-for="concierge"] .inside-house-item-number,
#inside-house-tab-advisory:checked ~ .inside-house-directory label[data-for="advisory"] .inside-house-item-number,
#inside-house-tab-culture:checked ~ .inside-house-directory label[data-for="culture"] .inside-house-item-number {
  color: var(--inside-house-gold);
}

#inside-house-tab-aviation:checked ~ .inside-house-directory label[data-for="aviation"] .inside-house-item-name,
#inside-house-tab-membership:checked ~ .inside-house-directory label[data-for="membership"] .inside-house-item-name,
#inside-house-tab-concierge:checked ~ .inside-house-directory label[data-for="concierge"] .inside-house-item-name,
#inside-house-tab-advisory:checked ~ .inside-house-directory label[data-for="advisory"] .inside-house-item-name,
#inside-house-tab-culture:checked ~ .inside-house-directory label[data-for="culture"] .inside-house-item-name {
  color: var(--inside-house-ivory);
}

/* Visible keyboard-focus ring on the corresponding row when its
   hidden radio has focus (Tab key navigation, no mouse involved). */
#inside-house-tab-aviation:focus-visible ~ .inside-house-directory label[data-for="aviation"],
#inside-house-tab-membership:focus-visible ~ .inside-house-directory label[data-for="membership"],
#inside-house-tab-concierge:focus-visible ~ .inside-house-directory label[data-for="concierge"],
#inside-house-tab-advisory:focus-visible ~ .inside-house-directory label[data-for="advisory"],
#inside-house-tab-culture:focus-visible ~ .inside-house-directory label[data-for="culture"] {
  outline: 1px solid var(--inside-house-gold);
  outline-offset: -3px;
}

/* ---------------------------------------------------------------
   ROOMS — five panels always in the DOM; CSS shows only the one
   matching the checked radio. This is the no-JS-required core.
   --------------------------------------------------------------- */

.inside-house-rooms {
  position: relative;
}

.inside-house-room {
  display: none;
  grid-template-columns: 1.1fr 1fr;
  animation: inside-house-fade 0.6s ease both;
}

#inside-house-tab-aviation:checked ~ .inside-house-rooms [data-room="aviation"],
#inside-house-tab-membership:checked ~ .inside-house-rooms [data-room="membership"],
#inside-house-tab-concierge:checked ~ .inside-house-rooms [data-room="concierge"],
#inside-house-tab-advisory:checked ~ .inside-house-rooms [data-room="advisory"],
#inside-house-tab-culture:checked ~ .inside-house-rooms [data-room="culture"] {
  display: grid;
}

@keyframes inside-house-fade {
  from { opacity: 0; }
  to { opacity: 1; }
}

.inside-house-room-media {
  position: relative;
  overflow: hidden;
  background: radial-gradient(120% 140% at 70% 20%, #201c14 0%, #100f0b 46%, #0a0908 100%);
}

.inside-house-room-media img,
.inside-house-room-motif {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center center;
}

.inside-house-room-veil {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(10, 9, 8, 0) 55%, rgba(10, 9, 8, 0.5) 100%);
  pointer-events: none;
}

.inside-house-room-copy {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: calc(var(--inside-house-unit) * 2.5);
  padding: calc(var(--inside-house-unit) * 6) calc(var(--inside-house-unit) * 5) calc(var(--inside-house-unit) * 6) calc(var(--inside-house-unit) * 4);
}

.inside-house-room-label {
  font-family: var(--inside-house-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--inside-house-gold);
  margin: 0;
}

.inside-house-room-desc {
  font-family: var(--inside-house-sans);
  font-size: 16px;
  line-height: 1.65;
  color: rgba(245, 243, 239, 0.82);
  margin: 0;
  max-width: 40ch;
}

.inside-house-room-link {
  display: inline-flex;
  align-items: center;
  gap: calc(var(--inside-house-unit) * 1.25);
  align-self: flex-start;
  font-family: var(--inside-house-sans);
  font-size: 13px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--inside-house-ivory);
  text-decoration: none;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--inside-house-gold-muted);
  transition: border-color 0.4s ease, color 0.4s ease, gap 0.4s ease;
}

.inside-house-room-link:hover {
  color: var(--inside-house-gold);
  border-color: var(--inside-house-gold);
  gap: calc(var(--inside-house-unit) * 2);
}

.inside-house-room-link-arrow {
  transition: transform 0.4s ease;
}

.inside-house-room-link:hover .inside-house-room-link-arrow {
  transform: translateX(3px);
}

/* ---- Placeholder architectural motif: a corridor of doors.
   TEMPORARY — stands in for the real per-division interior detail
   shot. Not a proposed permanent visual device. See README §6/§7. ---- */

.inside-house-door {
  fill: none;
  stroke: var(--inside-house-gold);
  stroke-width: 1;
}

.inside-house-glow {
  fill: var(--inside-house-gold);
  opacity: 0.5;
}

.inside-house-corridor {
  fill: none;
  stroke: rgba(201, 162, 75, 0.25);
  stroke-width: 1;
}

/* ---------------------------------------------------------------
   MOBILE — 390 × 844
   Deliberate mobile-specific interaction: the directory becomes a
   horizontal, swipeable editorial tab rail (not the desktop list
   simply stacked). Image stays prominent; total section height is
   controlled rather than growing with five full-width rows.
   Still driven entirely by the same native radio group — no JS
   required, same as desktop.
   --------------------------------------------------------------- */

@media (max-width: 780px) {
  .inside-house-header {
    padding: calc(var(--inside-house-unit) * 5) var(--inside-house-edge) calc(var(--inside-house-unit) * 3.5);
  }

  .inside-house-kicker {
    margin-bottom: calc(var(--inside-house-unit) * 1.5);
  }

  .inside-house-headline {
    font-size: clamp(24px, 6.5vw, 30px);
    margin-bottom: calc(var(--inside-house-unit) * 1.75);
  }

  .inside-house-lead {
    font-size: 14px;
    line-height: 1.55;
  }

  .inside-house-grid {
    grid-template-columns: 1fr;
    min-height: 0;
    border-top: 1px solid rgba(201, 162, 75, 0.16);
  }

  /* ---- Editorial tab rail: horizontal, swipeable, compact ---- */

  .inside-house-directory {
    display: flex;
    flex-direction: row;
    width: 100%;
    min-width: 0;
    overflow-x: auto;
    scroll-snap-type: x proximity;
    -webkit-overflow-scrolling: touch;
    border-right: none;
    border-bottom: 1px solid rgba(201, 162, 75, 0.16);
    padding: 0 calc(var(--inside-house-unit) * 2);
    scrollbar-width: thin;
    scrollbar-color: var(--inside-house-gold-muted) transparent;
  }

  .inside-house-directory::-webkit-scrollbar {
    height: 3px;
  }

  .inside-house-directory::-webkit-scrollbar-thumb {
    background: var(--inside-house-gold-muted);
  }

  .inside-house-item {
    flex: 0 0 auto;
    border-bottom: none;
    border-right: 1px solid rgba(201, 162, 75, 0.12);
    scroll-snap-align: start;
  }

  .inside-house-item:last-child {
    border-right: none;
  }

  .inside-house-item-button {
    flex-direction: column;
    align-items: flex-start;
    gap: calc(var(--inside-house-unit) * 0.5);
    white-space: nowrap;
    padding: calc(var(--inside-house-unit) * 2) calc(var(--inside-house-unit) * 2.5);
    border-left: none;
    border-bottom: 2px solid transparent;
    transition: border-color 0.4s ease, background 0.4s ease;
  }

  .inside-house-item-name {
    font-size: 15px;
  }

  /* Override the desktop left-border/padding-left active treatment
     with a bottom-border indicator, appropriate for a horizontal rail. */
  #inside-house-tab-aviation:checked ~ .inside-house-directory label[data-for="aviation"],
  #inside-house-tab-membership:checked ~ .inside-house-directory label[data-for="membership"],
  #inside-house-tab-concierge:checked ~ .inside-house-directory label[data-for="concierge"],
  #inside-house-tab-advisory:checked ~ .inside-house-directory label[data-for="advisory"],
  #inside-house-tab-culture:checked ~ .inside-house-directory label[data-for="culture"] {
    border-left-color: transparent;
    padding-left: calc(var(--inside-house-unit) * 2.5);
    border-bottom-color: var(--inside-house-gold);
  }

  /* ---- Room: image prominent, fixed controlled height, compact copy ---- */

  .inside-house-room {
    grid-template-columns: 1fr;
  }

  .inside-house-room-media {
    height: clamp(200px, 34vh, 260px);
    min-height: 0;
  }

  .inside-house-room-copy {
    padding: calc(var(--inside-house-unit) * 3) var(--inside-house-edge) calc(var(--inside-house-unit) * 4);
    gap: calc(var(--inside-house-unit) * 1.5);
  }

  .inside-house-room-desc {
    font-size: 15px;
    max-width: none;
  }
}

/* ---- Reduced motion ---- */

@media (prefers-reduced-motion: reduce) {
  .inside-house-item-button,
  .inside-house-item-number,
  .inside-house-item-name,
  .inside-house-room-link,
  .inside-house-room-link-arrow {
    transition: none !important;
  }

  .inside-house-room {
    animation: none !important;
  }
}