/* ============================================================
   Sketchbooks page — shelf only, title overlaid on image
   ============================================================ */

/* Page fills the viewport, no scroll bleed below the shelf */
.sb-body {
  overflow-x: hidden;
}

/* ---- Shelf section ---- */

.shelf-section {
  background: #1a1210;
}

.shelf-wrap {
  position: relative;
  width: 100%;
  /* Lock to the source image's 16:9 ratio so all four images
     overlay pixel-perfectly */
  aspect-ratio: 16 / 9;
  overflow: hidden;
}

/* All four images share the same box; out states fade in on top */
.shelf-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  display: block;
  user-select: none;
  -webkit-user-drag: none;
}

.shelf-base {
  z-index: 1;
}

.shelf-out {
  z-index: 2;
  opacity: 0;
  transition: opacity 220ms ease;
}

.shelf-out.is-visible {
  opacity: 1;
}

/* ---- Title overlay ---- */

.shelf-title {
  position: absolute;
  top: clamp(1.25rem, 3.5vw, 2.75rem);
  left: clamp(1.5rem, 4vw, 3rem);
  z-index: 20;
  pointer-events: none;
  max-width: 60%;
}

.shelf-title h1 {
  margin: 0;
  font-family: "Abril Fatface", serif;
  color: var(--text-primary);
  font-size: clamp(2rem, 6.5vw, 5.6rem);
  line-height: 0.92;
  letter-spacing: 0.005em;
  /* Keep the title from ever pushing past the wrap on narrow screens */
  white-space: nowrap;
}

/* ---- Hotspots ---- */

.shelf-hotspot {
  position: absolute;
  top: 0;
  height: 100%;
  left: var(--hs-left);
  width: var(--hs-width);
  z-index: 10;
  cursor: grab;
}

.shelf-hotspot:active {
  cursor: grabbing;
}

/* Hotspot positions per book (desktop) */
.shelf-hotspot[data-vol="1"] { --hs-left: 36%; --hs-width: 6%; }
.shelf-hotspot[data-vol="2"] { --hs-left: 42%; --hs-width: 6%; }
.shelf-hotspot[data-vol="3"] { --hs-left: 48%; --hs-width: 7%; }
.shelf-hotspot[data-vol="4"] { --hs-left: 62%; --hs-width: 6%; }

/* ---- Idle demo cycle ---- */

.shelf-wrap.is-demo .shelf-out {
  animation: shelf-demo-fade 12s infinite ease-in-out;
}

.shelf-wrap.is-demo #shelf-out-1 { animation-delay: 0s; }
.shelf-wrap.is-demo #shelf-out-2 { animation-delay: 4s; }
.shelf-wrap.is-demo #shelf-out-3 { animation-delay: 8s; }

@keyframes shelf-demo-fade {
  0%, 33%, 100% { opacity: 0; }
  10%, 25%       { opacity: 1; }
}

/* If the user is actively hovering, kill the auto-cycle for whatever
   they're previewing so the JS-driven .is-visible wins cleanly */
.shelf-out.is-visible {
  animation: none;
}

/* ---- Volume label (bottom-left when a book is out) ---- */

.shelf-label {
  position: absolute;
  bottom: clamp(1rem, 3vw, 2rem);
  left: clamp(1rem, 3vw, 2rem);
  z-index: 25;
  opacity: 0;
  transform: translateY(6px);
  transition:
    opacity 220ms ease,
    transform 220ms ease;
  pointer-events: none;
}

.shelf-label.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.shelf-label-text {
  display: inline-block;
  font-family: "Abril Fatface", serif;
  font-size: clamp(1rem, 2vw, 1.5rem);
  color: #f7f2eb;
  letter-spacing: 0.02em;
  text-shadow: 0 1px 8px rgba(0, 0, 0, 0.55);
}

/* ---- Idle hint (bottom-right) ---- */

.shelf-hint {
  position: absolute;
  bottom: clamp(1rem, 3vw, 2rem);
  right: clamp(1rem, 3vw, 2rem);
  z-index: 25;
  margin: 0;
  font-size: 0.68rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: rgba(247, 242, 235, 0.6);
  pointer-events: none;
  transition: opacity 400ms ease;
  max-width: none;
  text-shadow: 0 1px 4px rgba(0, 0, 0, 0.45);
}

.shelf-hint.is-gone {
  opacity: 0;
}

/* ---- Hotspot button reset ---- */

button.shelf-hotspot {
  margin: 0;
  padding: 0;
  background: transparent;
  border: 0;
  font: inherit;
  color: inherit;
  outline: none;
}

button.shelf-hotspot:focus-visible {
  outline: 2px dashed rgba(247, 242, 235, 0.7);
  outline-offset: -6px;
}

/* ---- Video modal ---- */

body.modal-open {
  overflow: hidden;
}

.video-modal {
  position: fixed;
  inset: 0;
  z-index: 400;
  display: none;
  align-items: center;
  justify-content: center;
  padding: clamp(1rem, 3vw, 2rem);
}

.video-modal.is-open {
  display: flex;
  animation: video-modal-in 220ms var(--ease-standard) both;
}

@keyframes video-modal-in {
  from { opacity: 0; }
  to   { opacity: 1; }
}

.video-modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(20, 12, 12, 0.82);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  cursor: pointer;
}

.video-modal-dialog {
  position: relative;
  z-index: 1;
  width: min(100%, 1440px);
  max-height: calc(100svh - clamp(1.5rem, 4vw, 2.5rem));
  display: grid;
  grid-template-rows: auto 1fr;
  gap: clamp(0.6rem, 1.4vw, 1rem);
  background: var(--depth);
  border: 1px solid rgba(247, 242, 235, 0.12);
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.55);
  padding: clamp(0.85rem, 2vw, 1.25rem);
  animation: video-modal-rise 320ms var(--ease-standard) both;
}

@keyframes video-modal-rise {
  from {
    opacity: 0;
    transform: translateY(18px) scale(0.985);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.video-modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  padding-bottom: clamp(0.4rem, 1vw, 0.6rem);
  border-bottom: 1px solid rgba(247, 242, 235, 0.12);
}

.video-modal-header .kicker {
  margin: 0;
  color: rgba(247, 242, 235, 0.78);
}

.video-modal-close {
  appearance: none;
  background: transparent;
  border: 1px solid rgba(247, 242, 235, 0.35);
  border-radius: 999px;
  color: #f7f2eb;
  width: 2.1rem;
  height: 2.1rem;
  display: grid;
  place-items: center;
  font-size: 1.4rem;
  line-height: 1;
  cursor: pointer;
  transition:
    background 180ms ease,
    border-color 180ms ease,
    color 180ms ease,
    transform 180ms ease;
}

.video-modal-close:hover,
.video-modal-close:focus-visible {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--depth);
  transform: rotate(90deg);
}

.video-modal-stage {
  position: relative;
  background: #000;
  display: grid;
  place-items: center;
  min-height: 0;
  overflow: hidden;
}

.video-modal-video {
  width: 100%;
  height: auto;
  max-height: calc(100svh - clamp(6rem, 11vw, 8rem));
  display: block;
  background: #000;
}

/* ---- Mobile: zoom into the sketchbooks ----
   The shelf image is landscape 16:9. On a narrow portrait phone the books
   would be tiny, so we switch to a portrait container (4:5) and let
   object-fit: cover crop the wide sides. The visible band ends up roughly
   the central 45% of the original image — right where the labeled books
   live — so hotspots get remapped accordingly. */

@media (max-width: 640px) {
  .shelf-wrap {
    aspect-ratio: 4 / 5;
  }

  .shelf-img {
    object-position: 48% 50%;
  }

  /* Hotspot positions remapped for the cropped (zoomed) view.
     Math: visible band runs from 27.5% to 72.5% of the original image,
     so original_pct → (original_pct − 27.5) / 45 on the container. */
  .shelf-hotspot[data-vol="1"] { --hs-left: 19%; --hs-width: 13%; }
  .shelf-hotspot[data-vol="2"] { --hs-left: 32%; --hs-width: 13%; }
  .shelf-hotspot[data-vol="3"] { --hs-left: 45%; --hs-width: 16%; }
  .shelf-hotspot[data-vol="4"] { --hs-left: 76%; --hs-width: 14%; }

  .shelf-title h1 {
    font-size: clamp(1.6rem, 8vw, 2.6rem);
  }

  .shelf-title {
    top: clamp(0.75rem, 2.5vw, 1.25rem);
    left: clamp(0.85rem, 3vw, 1.5rem);
  }

  .shelf-hint {
    font-size: 0.6rem;
    letter-spacing: 0.12em;
  }
}

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

@media (prefers-reduced-motion: reduce) {
  .shelf-out,
  .shelf-label {
    transition: none;
  }

  .shelf-wrap.is-demo .shelf-out {
    animation: none;
  }
}