/* ============================================
   KANPEKI BOOKSHELF — Minimal Flat Edition
   ============================================ */
html, body {
  display: block !important;
  overflow-y: hidden;
}

@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;700;800&display=swap');

:root {
  /* Flat color palette */
  --ink: #4a3b32; 
  --ink-soft: #6e5b50;
  --paper: #f4f1ea;  
  --paper-deep: #ece6d8;
  --wood: #835838; 
  --wood-edge: #6a4429;

  /* Slots */
  --slot-w-min: 28px;
  --slot-w-max: 42px;
  --book-h-min: 70px;
  --book-h-max: 160px;
  --stroke: 2px;
  --gap: 6px;

  font-family: 'DM Sans', system-ui, sans-serif;
  width: 100%;
  min-height: 280px;
  background: var(--paper);
  color: var(--ink);
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: calc(40px + var(--overflow-pad-top, 0px)) 24px 40px;
  container-type: inline-size;
  container-name: bookshelf;
  box-sizing: border-box;
}
#bookshelf-wrapper *,
#bookshelf-wrapper *::before,
#bookshelf-wrapper *::after { box-sizing: border-box; }

/* ---------- SHELF ---------- */
.bs-shelf-wrap {
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: stretch;
  position: relative;
}

/* Surface where books and decorations rest */
.bs-surface {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: var(--gap);
  width: 100%;
  padding: 0 4px;
  min-height: 170px;
}

/* Main vertical zone: standing books + decorations */
.bs-row-vertical {
  flex: 1;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  gap: var(--gap);
  min-width: 0;
}

/* Right side: stack of horizontal books */
.bs-stack-horizontal {
  display: flex;
  flex-direction: column-reverse;
  align-items: stretch;
  justify-content: flex-end;
  gap: 2px;
  flex-shrink: 0;
  padding-left: 8px;
  min-width: 110px;
  /* Discrete separator line between the shelf and the stack */
  border-left: 1px dashed var(--ink-soft, var(--ink));
  margin-left: 4px;
}

/* The wooden board */
.bs-board {
  width: 100%;
  height: 26px;
  background: var(--wood);
  border: var(--stroke) solid var(--ink);
  border-radius: 5px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 14px;
  position: relative;
  letter-spacing: 4px;
  font-size: 11px;
  font-weight: 700;
  text-transform: none;
  color: var(--paper);
  box-shadow: 0 6px 0 -3px var(--ink);
}

.bs-board-label {
  flex: 1;
  text-align: center;
  user-select: none;
  pointer-events: auto;
  cursor: text;
  font-family: 'DM Sans', sans-serif;
  padding: 2px 8px;
  border-radius: 3px;
  transition: background 0.15s ease, color 0.15s ease, letter-spacing 0.15s ease;
  min-width: 0;
  max-width: 60%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.bs-board-label:hover:not(.editing) {
  background: rgba(255, 255, 255, 0.08);
}
.bs-board-label.editing {
  background: var(--paper);
  color: var(--ink);
  outline: 2px solid var(--ink);
  outline-offset: 1px;
  letter-spacing: 1px;
  user-select: text;
  cursor: text;
}

/* Settings button integrated as a detail of the board */
.bs-settings-trigger {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--paper);
  border: var(--stroke) solid var(--ink);
  cursor: pointer;
  flex-shrink: 0;
  padding: 0;
  position: relative;
  transition: transform 0.18s ease, background 0.18s ease;
}
.bs-settings-trigger:hover {
  background: var(--ink);
  transform: rotate(45deg);
}
.bs-settings-trigger::before,
.bs-settings-trigger::after {
  content: '';
  position: absolute;
  background: var(--ink);
  transition: background 0.18s ease;
}
.bs-settings-trigger::before {
  top: 50%; left: 1px; right: 1px;
  height: 2px;
  transform: translateY(-50%);
}
.bs-settings-trigger::after {
  left: 50%; top: 1px; bottom: 1px;
  width: 2px;
  transform: translateX(-50%);
}
.bs-settings-trigger:hover::before,
.bs-settings-trigger:hover::after { background: var(--paper); }

.bs-counter-dot {
  font-size: 9px;
  font-weight: 700;
  color: var(--paper);
  background: transparent;
  border: var(--stroke) solid var(--paper);
  border-radius: 50%;
  width: 22px;
  height: 22px;
  display: flex;
  align-items: center;
  justify-content: center;
  letter-spacing: 0;
  flex-shrink: 0;
}

/* ---------- SLOTS ---------- */
.bs-slot{
  display: flex;
  align-items: flex-end;
  justify-content: center;
  position: relative;
  min-width: var(--slot-w-min);
  min-height: var(--book-h-min);
  transition: background 0.15s ease;
}

.bs-slot .bs-book{
  border-radius: 4px 4px 0 0;
  border: var(--stroke) solid var(--ink);
}

/* Empty slot: subtle + on hover */
.bs-slot.empty {
  width: var(--slot-w-min);
  height: var(--book-h-min);
  border: 2px dashed transparent;
  cursor: pointer;
  opacity: 0.35;
  transition: opacity 0.18s ease, border-color 0.18s ease;
}
.bs-slot.empty:hover {
  opacity: 1;
  border-color: var(--ink);
}
.bs-slot.empty::after {
  content: '+';
  font-size: 22px;
  color: var(--ink);
  font-weight: 300;
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  font-family: 'DM Sans', sans-serif;
}

.bs-slot.drop-target {
  background: rgba(74, 59, 50, 0.08);
}
.bs-slot.drop-target::before {
  content: '';
  position: absolute;
  left: 50%;
  top: 0; bottom: 0;
  width: 2px;
  background: var(--ink);
  transform: translateX(-50%);
}

/* --- Horizontal slot (stack of lying books) --- */
.bs-slot.bs-slot-horizontal {
  display: block;
  min-width: 100px;
  min-height: 22px;
  height: auto;
  align-items: initial;
  justify-content: initial;
}
.bs-slot.bs-slot-horizontal.empty {
  width: 100%;
  height: 22px;
}
.bs-slot.bs-slot-horizontal.empty::after {
  font-size: 16px;
}
.bs-slot.bs-slot-horizontal.drop-target {
  background: rgba(74, 59, 50, 0.08);
}
.bs-slot.bs-slot-horizontal.drop-target::before {
  /* Horizontal line instead of vertical to indicate lying insertion */
  left: 0; right: 0;
  top: 50%;
  width: auto;
  height: 2px;
  transform: translateY(-50%);
}

/* ---------- BOOK ---------- */
.bs-book {
  --book-color: #b23b3b;
  --book-w: 26px;
  --book-h: 120px;

  width: var(--book-w);
  height: var(--book-h);
  background: var(--book-color);
  /* border: var(--stroke) solid var(--ink); */
  border-bottom: none;
  border-radius: 3px 3px 0 0;
  cursor: pointer;
  display: flex;
  justify-content: center;
  align-items: center;
  color: var(--book-text, #ffffff);
  font-weight: 700;
  font-size: 11px;
  text-transform: none;
  letter-spacing: 1px;
  writing-mode: vertical-rl;
  text-orientation: mixed;
  transform: rotate(180deg);
  transition: transform 0.18s ease, filter 0.18s ease;
  user-select: none;
  padding: 6px 0;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
  position: relative;
  flex-shrink: 0;
}

.bs-book:hover {
  transform: rotate(180deg) translateY(4px);
  filter: brightness(1.08);
}
.bs-book.dragging {
  opacity: 0.35;
  transform: rotate(180deg) translateY(-8px);
}

/* --- Horizontal book (lying down) ---
   A vertical book has width (thickness) x height (length). When lying,
   the visible width = height (length) and visible height = width (thickness). */
.bs-book[data-orientation="horizontal"] {
  width: var(--book-h);
  height: var(--book-w);
  writing-mode: horizontal-tb;
  text-orientation: initial;
  transform: none;
  border-bottom: var(--stroke) solid var(--ink);
  border-radius: 3px;
  padding: 0 8px;
  justify-content: flex-start;
}
.bs-book[data-orientation="horizontal"]:hover {
  transform: translateX(-4px);
  filter: brightness(1.08);
}
.bs-book[data-orientation="horizontal"].dragging {
  transform: translateX(8px);
  opacity: 0.35;
}

/* ============================================
   SPINE STYLES — ornaments on the spine
   --------------------------------------------
   data-spine controls which decoration is painted over the book's background.
   Works for both vertical and horizontal books.
   ============================================ */

/* Helper: most styles use ::before / ::after.
   Disable pointer-events so they don't steal the click. */
.bs-book[data-spine]::before,
.bs-book[data-spine]::after {
  pointer-events: none;
}

/* --- panel: inner rectangle without border, centered --- */
.bs-book[data-spine="panel"]::before {
  content: '';
  position: absolute;
  /* Vertical: small vertical inset, width ~70% centered.
     Horizontal: due to visual rotation, sides swap roles; */
  top: 18%;
  bottom: 18%;
  left: 22%;
  right: 22%;
  background: rgba(255, 255, 255, 0.18);
  border-radius: 1px;
}

/* --- top-squares: two small squares at the top --- */
.bs-book[data-spine="top-squares"]::before {
  content: '';
  position: absolute;
  bottom: 75%;
  left: 50%;
  width: 60%;
  height: 14%;
  transform: translateX(-50%);
  background:
    linear-gradient(90deg,
      rgba(255,255,255,0.22) 0 45%,
      transparent 45% 55%,
      rgba(255,255,255,0.22) 55% 100%);
  border-radius: 1px;
}

.bs-book[data-orientation="horizontal"][data-spine="top-squares"]::before {
  top: 50%;
  bottom: auto;
  left: auto;
  right: 6%;
  width: 14%;
  height: 60%;
  transform: translateY(-50%);
  background:
    linear-gradient(180deg,
      rgba(255,255,255,0.22) 0 45%,
      transparent 45% 55%,
      rgba(255,255,255,0.22) 55% 100%);
}

/* --- bottom-bands: two lines at the bottom --- */
.bs-book[data-spine="bottom-bands"]::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: rgba(255, 255, 255, 0.25);
}
.bs-book[data-spine="bottom-bands"]::after {
  content: '';
  position: absolute;
  top: 8px;
  left: 0;
  right: 0;
  height: 3px;
  background: rgba(255, 255, 255, 0.18);
}

.bs-book[data-orientation="horizontal"][data-spine="bottom-bands"]::before {
  top: 0;
  bottom: 0;
  left: 0;
  right: auto;
  width: 4px;
  height: auto;
}
.bs-book[data-orientation="horizontal"][data-spine="bottom-bands"]::after {
  top: 0;
  bottom: 0;
  left: 8px;
  right: auto;
  width: 3px;
  height: auto;
}

/* ============================================
   SPINE IMAGE OVERLAY (premium PNG designs)
   --------------------------------------------
   JS injects a div .bs-book-image inside the book when the model has
   spineImage. This div cancels the parent rotation (180º + 180º = 360º)
   so the PNG appears upright.
   The PNG has a transparent background.
   ============================================ */
.bs-book-image {
  position: absolute;
  inset: 0;
  background-repeat: no-repeat;
  background-position: center;
  background-size: contain;
  transform: rotate(180deg);
  pointer-events: none;
  padding: 2px 0;
  box-sizing: border-box;
  z-index: 1;
}

.bs-book[data-spine-image][data-spine]::before,
.bs-book[data-spine-image][data-spine]::after {
  display: none;
}

.bs-book-title {
  position: relative;
  z-index: 2;
}

/* ---------- DECORATION ---------- */
.bs-decoration {
  display: flex;
  align-items: flex-end;
  justify-content: center;
  cursor: pointer;
  transition: transform 0.18s ease;
  user-select: none;
  flex-shrink: 0;
  height: 100%;
  position: relative;
}
.bs-decoration:hover { transform: translateY(-3px); }
.bs-decoration.dragging { opacity: 0.35; }
.bs-decoration svg {
  display: block;
  height: auto;
}

/* Hanging / overflowing decorations:
   allowed to protrude from the slot and go over the shelf. */
.bs-decoration.bs-decoration-overflow {
  align-items: flex-start;
  overflow: visible;
  /* translateY composition: --ov-top raises (negative value),
     --ov-bottom lowers (positive value). Default 0 if not set. */
  transform: translateY(var(--ov-top, 0px));
}
/* Keep the original hover without losing the overflow offset. */
.bs-decoration.bs-decoration-overflow:hover {
  transform: translateY(calc(var(--ov-top, 0px) - 3px));
}

/* ---------- MODAL ---------- */
.bs-modal {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.8);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  padding: 20px;
  animation: bsFade 0.18s ease;
}
.bs-modal.open { display: flex; }
@keyframes bsFade { from { opacity: 0; } to { opacity: 1; } }

.bs-modal-card {
  background: #fff;
  border: var(--stroke) solid var(--ink);
  border-radius: 8px;
  width: min(94%, 380px);
  max-height: 88vh;
  display: flex;
  flex-direction: column;
  box-shadow: 6px 6px 0 var(--ink);
  animation: bsRise 0.22s cubic-bezier(0.2, 0.9, 0.3, 1);
  overflow: hidden;
}
@keyframes bsRise {
  from { transform: translateY(12px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

.bs-modal-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 4px 18px;
  border-bottom: var(--stroke) solid var(--ink);
}
.bs-modal-head h3 {
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  margin: 0;
  color: var(--ink);
}
.bs-modal-close {
  width: 26px;
  height: 26px;
  background: transparent;
  border: 2px solid var(--ink);
  border-radius: 4px;
  cursor: pointer;
  font-size: 16px;
  line-height: 1;
  color: var(--ink);
  padding: 0;
  font-weight: 700;
}
.bs-modal-close:hover { background: var(--ink); color: var(--paper); }

.bs-modal-body {
  padding: 5px 18px;
  overflow-y: auto;
  flex: 1;
}

.bs-modal-foot {
  padding: 4px 18px;
  border-top: var(--stroke) solid var(--ink);
  display: flex;
  gap: 10px;
  justify-content: space-between;
}
.bs-modal-foot.right { justify-content: flex-end; }

/* Form rows */
.bs-row {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 10px;
}
.bs-row label {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 1.2px;
  text-transform: uppercase;
  color: var(--ink-soft);
  display: flex;
  justify-content: space-between;
}
.bs-row label .bs-val {
  font-family: 'DM Sans', monospace;
  color: var(--ink);
}
.bs-row input[type="text"] {
  background: var(--paper-deep);
  border: 2px solid var(--ink);
  border-radius: 5px;
  padding: 5px 12px;
  font-family: inherit;
  font-size: 13px;
  color: var(--ink);
  outline: none;
}
.bs-row input[type="text"]:focus { background: var(--paper); }

.bs-row input[type="date"] {
  background: var(--paper-deep);
  border: 2px solid var(--ink);
  border-radius: 5px;
  padding: 5px 12px;
  font-family: inherit;
  font-size: 12px;
  color: var(--ink);
  outline: none;
  font-weight: 600;
  letter-spacing: 0.3px;
  width: 100%;
  cursor: pointer;
}
.bs-row input[type="date"]:focus { background: var(--paper); }
.bs-row input[type="date"]::-webkit-calendar-picker-indicator {
  cursor: pointer;
  opacity: 0.6;
  filter: invert(15%);
}
.bs-row input[type="date"]::-webkit-calendar-picker-indicator:hover { opacity: 1; }

/* Radio group flat (segmented control) */
.bs-radio-group {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 8px;
}
.bs-radio {
  position: relative;
  cursor: pointer;
  display: block;
}
.bs-radio input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
  width: 0;
  height: 0;
}
.bs-radio span {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 10px 12px;
  border: 2px solid var(--ink);
  border-radius: 5px;
  background: var(--paper-deep);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.8px;
  text-transform: uppercase;
  color: var(--ink);
  transition: all 0.15s;
  user-select: none;
}
.bs-radio:hover span {
  background: var(--paper);
  transform: translate(-1px, -1px);
  box-shadow: 2px 2px 0 var(--ink);
}
.bs-radio input:checked + span {
  background: var(--ink);
  color: var(--paper);
}
.bs-radio input:focus-visible + span {
  outline: 2px solid var(--ink);
  outline-offset: 2px;
}

/* Premium decoration card (free: false) */
.bs-decor-pick.premium {
  position: relative;
  cursor: not-allowed;
  background: #dfd8f9;
}
.bs-decor-pick.premium:not(.active) {
  opacity: 0.55;
}
.bs-decor-pick.premium:not(.active):hover {
  transform: none;
  box-shadow: none;
  background: #b3abd1;
}
.bs-premium-badge {
  position: absolute;
  top: 6px;
  right: 6px;
  display: inline-flex;
  align-items: center;
  gap: 3px;
  background: #2b2450;
  color: var(--paper);
  padding: 3px 7px;
  border-radius: 999px;
  font-size: 8px;
  font-weight: 800;
  letter-spacing: 0.8px;
  text-transform: uppercase;
  z-index: 2;
  white-space: nowrap;
}
.bs-premium-badge svg {
  width: 9px;
  height: 9px;
  flex-shrink: 0;
}
.bs-decor-pick.active .bs-premium-badge {
  background: var(--paper);
  color: var(--ink);
}

/* Variant selector (inside active decoration card) */
.bs-variant-selector {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 4px;
  width: 100%;
  margin-top: 4px;
  padding-top: 8px;
  border-top: 1px dashed currentColor;
}
.bs-variant-btn {
  border: 2px solid var(--ink);
  border-radius: 4px;
  background: var(--paper);
  cursor: pointer;
  padding: 4px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  transition: all 0.15s;
  position: relative;
}
.bs-variant-btn img {
  max-height: 36px;
  max-width: 100%;
  object-fit: contain;
  pointer-events: none;
}
.bs-variant-btn:hover {
  transform: translate(-1px, -1px);
  box-shadow: 2px 2px 0 var(--ink);
}
.bs-variant-btn.active {
  background: var(--ink);
  outline: 2px solid var(--ink);
  outline-offset: 2px;
}
.bs-variant-btn.active::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(244, 241, 234, 0.12);
  pointer-events: none;
}
.bs-decor-pick.active .bs-variant-btn {
  border-color: var(--paper);
}
.bs-decor-pick.active .bs-variant-btn.active {
  background: var(--paper);
  outline-color: var(--paper);
}

/* Range custom flat */
.bs-row input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  cursor: pointer;
  background: #000;
}
.bs-row input[type="range"]::-webkit-slider-runnable-track {
  height: 4px;
  border-radius: 2px;
}
.bs-row input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 18px;
  height: 18px;
  border: 3px solid var(--ink);
  background-color: #fff;
  border-radius: 50%;
  margin-top: -7px;
  cursor: grab;
}
.bs-row input[type="range"]::-webkit-slider-thumb:active { cursor: grabbing; }
.bs-row input[type="range"]::-moz-range-track {
  height: 4px;
  border-radius: 2px;
}
.bs-row input[type="range"]::-moz-range-thumb {
  width: 14px;
  height: 14px;
  border: 3px solid var(--ink);
  border-radius: 50%;
  cursor: grab;
}

/* Color picker: swatches + custom */
.bs-swatches {
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  gap: 2px;
  margin-bottom: 8px;
}
.bs-swatch {
  aspect-ratio: 2;
  border: 2px solid var(--ink);
  border-radius: 4px;
  cursor: pointer;
  position: relative;
  transition: transform 0.15s;
}
.bs-swatch:hover { transform: scale(1.08); }
.bs-swatch.active {
  box-shadow: 0 0 0 2px var(--paper), 0 0 0 4px var(--ink);
}

.bs-color-custom {
  display: flex;
  align-items: center;
  gap: 8px;
}
.bs-color-custom input[type="color"] {
  width: 44px;
  height: 28px;
  border: 2px solid var(--ink);
  border-radius: 4px;
  padding: 0;
  cursor: pointer;
  background: transparent;
}
.bs-color-custom input[type="text"] {
  flex: 1;
  font-family: 'DM Sans', monospace;
  text-transform: uppercase;
  background: var(--paper-deep);
  border: 2px solid var(--ink);
  border-radius: 5px;
  padding: 5px 10px;
  font-size: 12px;
  color: var(--ink);
  outline: none;
}

/* --- Spine style picker (in book modal) --- */
.bs-spines {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 6px;
}
.bs-spine-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 6px 4px;
  background: var(--paper);
  border: 2px solid var(--ink);
  border-radius: 5px;
  cursor: pointer;
  font-family: inherit;
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.6px;
  text-transform: uppercase;
  color: var(--ink);
  transition: all 0.15s;
}
.bs-spine-card:hover {
  background: var(--paper-deep);
  transform: translate(-1px, -1px);
  box-shadow: 2px 2px 0 var(--ink);
}
.bs-spine-card.active {
  background: var(--ink);
  color: var(--paper);
}

/* Preview is a mini vertical book with the same data-spine. */
.bs-spine-preview {
  --book-w: 18px;
  --book-h: 44px;
  width: var(--book-w);
  height: var(--book-h);
  background: var(--book-color, #b23b3b);
  border: 1.5px solid var(--ink);
  border-bottom: none;
  border-radius: 2px 2px 0 0;
  position: relative;
  flex-shrink: 0;
}

.bs-spine-card.active .bs-spine-preview {
  border-color: var(--paper);
}

.bs-spine-preview[data-spine="panel"]::before {
  content: '';
  position: absolute;
  top: 22%;
  bottom: 22%;
  left: 22%;
  right: 22%;
  background: rgba(255, 255, 255, 0.25);
  border-radius: 1px;
}
.bs-spine-preview[data-spine="top-squares"]::before {
  content: '';
  position: absolute;
  top: 12%;
  left: 50%;
  width: 70%;
  height: 16%;
  transform: translateX(-50%);
  background:
    linear-gradient(90deg,
      rgba(255,255,255,0.28) 0 45%,
      transparent 45% 55%,
      rgba(255,255,255,0.28) 55% 100%);
  border-radius: 1px;
}
.bs-spine-preview[data-spine="bottom-bands"]::before {
  content: '';
  position: absolute;
  bottom: 8%;
  left: 0;
  right: 0;
  height: 4px;
  background: rgba(255, 255, 255, 0.3);
}
.bs-spine-preview[data-spine="bottom-bands"]::after {
  content: '';
  position: absolute;
  bottom: 18%;
  left: 0;
  right: 0;
  height: 3px;
  background: rgba(255, 255, 255, 0.22);
}

/* --- Spine image picker (premium PNG designs) --- */
.bs-spine-images {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 6px;
}

.bs-spine-img-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 6px 4px;
  background: var(--paper);
  border: 2px solid var(--ink);
  border-radius: 5px;
  cursor: pointer;
  font-family: inherit;
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.6px;
  text-transform: uppercase;
  color: var(--ink);
  transition: all 0.15s;
}
.bs-spine-img-card:hover {
  background: var(--paper-deep);
  transform: translate(-1px, -1px);
  box-shadow: 2px 2px 0 var(--ink);
}
.bs-spine-img-card.active {
  background: var(--ink);
  color: var(--paper);
}

.bs-spine-img-preview {
  width: 24px;
  height: 56px;
  background-color: var(--book-color, #b23b3b);
  background-repeat: no-repeat;
  background-position: center;
  background-size: contain;
  border: 1.5px solid var(--ink);
  border-bottom: none;
  border-radius: 2px 2px 0 0;
  flex-shrink: 0;
  position: relative;
}
.bs-spine-img-card.active .bs-spine-img-preview {
  border-color: var(--paper);
}

/* Premium spine image card (free: false) — same pattern as decorations */
.bs-spine-img-card.premium {
  position: relative;
  cursor: not-allowed;
  background: #dfd8f9;
}
.bs-spine-img-card.premium:not(.active) {
  opacity: 0.55;
}
.bs-spine-img-card.premium:not(.active):hover {
  transform: none;
  box-shadow: none;
  background: #b3abd1;
}
.bs-spine-img-card.active .bs-premium-badge {
  background: var(--paper);
  color: var(--ink);
}

/* "None" variant: preview without image, with diagonal mark */
.bs-spine-img-none {
  display: flex;
  align-items: center;
  justify-content: center;
}
.bs-spine-img-none-mark {
  font-size: 22px;
  font-weight: 300;
  color: var(--paper);
  opacity: 0.6;
  text-shadow: 0 0 2px var(--ink);
  transform: rotate(-10deg);
}

.bs-row.bs-overridden {
  opacity: 0.45;
  transition: opacity 0.2s ease;
}
.bs-row.bs-overridden::after {
  content: '↑ Overridden by active premium design';
  display: block;
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.8px;
  text-transform: uppercase;
  color: var(--ink-soft, var(--ink));
  margin-top: 4px;
  text-align: right;
}

/* Buttons */
.bs-btn {
  font-family: inherit;
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 1.4px;
  text-transform: uppercase;
  padding: 4px 16px;
  border: var(--stroke) solid var(--ink);
  border-radius: 5px;
  background: var(--paper);
  color: var(--ink);
  cursor: pointer;
  transition: all 0.15s;
}
.bs-btn:hover {
  background: var(--ink);
  color: var(--paper);
}
.bs-btn.danger:hover {
  background: #c44;
  border-color: #c44;
}
.bs-btn.danger.confirming {
  background: #c44;
  color: #fff;
  border-color: #c44;
  animation: bsConfirmPulse 1.2s ease-in-out infinite;
}
.bs-btn.danger.confirming:hover {
  background: #b03333;
  border-color: #b03333;
}
@keyframes bsConfirmPulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(196, 68, 68, 0.5); }
  50%      { box-shadow: 0 0 0 6px rgba(196, 68, 68, 0); }
}
.bs-btn.primary {
  background: var(--ink);
  color: var(--paper);
}
.bs-btn.primary:hover {
  background: var(--paper);
  color: var(--ink);
}

/* Pick: book vs decoration */
.bs-pick {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
.bs-pick-card {
  border: var(--stroke) solid var(--ink);
  border-radius: 6px;
  padding: 5px 12px;
  text-align: center;
  cursor: pointer;
  background: var(--paper);
  transition: all 0.15s;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}
.bs-pick-card:hover {
  background: var(--paper-deep);
  transform: translate(-2px, -2px);
  box-shadow: 4px 4px 0 var(--ink);
}
.bs-pick-card .bs-pick-icon {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.bs-pick-card .bs-pick-name {
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 1.4px;
  text-transform: uppercase;
}
.bs-pick-card.disabled {
  opacity: 0.35;
  pointer-events: none;
}

/* Decoration picker grid */
.bs-decor-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
}
.bs-decor-pick {
  border: var(--stroke) solid var(--ink);
  border-radius: 6px;
  padding: 2px;
  cursor: pointer;
  background: var(--paper);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  transition: all 0.15s;
}
.bs-decor-pick:hover {
  background: var(--paper-deep);
  transform: translate(-2px, -2px);
  box-shadow: 4px 4px 0 var(--ink);
}
.bs-decor-pick.active {
  background: var(--ink);
  color: var(--paper);
}
.bs-decor-pick.active svg path,
.bs-decor-pick.active svg circle,
.bs-decor-pick.active svg rect,
.bs-decor-pick.active svg line,
.bs-decor-pick.active svg ellipse {
  stroke: var(--paper) !important;
}
.bs-decor-pick.active svg [data-fill] { fill: var(--paper) !important; }

.bs-decor-pick img{
  height: 100%;
}


/* Settings panel repositioned */
.bs-settings-pop {
  position: absolute;
  bottom: calc(100% + 10px);
  right: 0;
  background: var(--paper);
  border: var(--stroke) solid var(--ink);
  border-radius: 6px;
  padding: 8px;
  min-width: 180px;
  box-shadow: 4px 4px 0 var(--ink);
  opacity: 0;
  pointer-events: none;
  transform: translateY(6px);
  transition: opacity 0.18s, transform 0.18s;
  z-index: 100;
  max-height: 160px;
  overflow-y: auto;
}

.bs-settings-pop.open {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}
.bs-settings-pop .bs-theme-row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 10px;
  border-radius: 4px;
  cursor: pointer;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--ink);
}
.bs-settings-pop .bs-theme-row:hover { background: var(--paper-deep); }
.bs-settings-pop .bs-theme-row.active { background: var(--ink); color: var(--paper); }
.bs-settings-pop .bs-theme-dots { display: flex; gap: 3px; }
.bs-settings-pop .bs-theme-dots i {
  width: 10px; height: 10px;
  border-radius: 50%;
  border: 1.5px solid var(--ink);
}
.bs-settings-pop .bs-theme-row.active .bs-theme-dots i { border-color: var(--paper); }
/* Optional: custom scrollbar for WebKit (Chrome, Edge, Safari) */
.bs-settings-pop::-webkit-scrollbar {
  width: 6px;
}
.bs-settings-pop::-webkit-scrollbar-track {
  background: var(--paper-deep);
  border-radius: 3px;
}
.bs-settings-pop::-webkit-scrollbar-thumb {
  background: var(--ink);
  border-radius: 3px;
}

/* Toast */
.bs-toast {
  position: fixed;
  bottom: 22px;
  left: 50%;
  transform: translateX(-50%) translateY(40px);
  background: var(--paper);
  color: var(--ink);
  border: var(--stroke) solid var(--ink);
  border-radius: 5px;
  padding: 8px 16px;
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 1.4px;
  text-transform: uppercase;
  z-index: 10001;
  opacity: 0;
  transition: all 0.25s cubic-bezier(0.2, 0.9, 0.3, 1);
  box-shadow: 4px 4px 0 var(--ink);
  pointer-events: none;
}
.bs-toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* ---------- THEMES (background variants) ---------- */
#bookshelf-wrapper.bs-theme-cream {
  --paper: #f6efe1;
  --paper-deep: #ebe1c9;
  --wood: #b08456;
  --ink: #3d2f25;
}
#bookshelf-wrapper.bs-theme-sage {
  --paper: #e8ebe1;
  --paper-deep: #d6dcc8;
  --wood: #6b7a4f;
  --ink: #2d3621;
}
#bookshelf-wrapper.bs-theme-ink {
  --paper: #1e1d24;
  --paper-deep: #2a2932;
  --wood: #5a4a3a;
  --ink: #f4f1ea;
  --ink-soft: #c8c2b4;
}
#bookshelf-wrapper.bs-theme-blush {
  --paper: #f5e8e4;
  --paper-deep: #ebd5cd;
  --wood: #c46d52;
  --ink: #3d2920;
}

/* Midnight Elegance — burgundy + old gold + cream on black */
#bookshelf-wrapper.bs-theme-midnight-elegance {
  --paper: #1A1A1A;
  --paper-deep: #4B1F2F;
  --wood: #B8A26D;
  --ink: #d9c5a1;
  --ink-soft: #B8A26D;
}

/* Kanpeki Universe — cosmic palette */
#bookshelf-wrapper.bs-theme-kanpeki {
  --paper: #0C0E1A;
  --paper-deep: #242A46;
  --wood: #7D6FB3;
  --ink: #c5c8d3;
  --ink-soft: #FBC48F;
}

/* Dark Academic — sepia, leather, parchment */
#bookshelf-wrapper.bs-theme-dark-academic {
  --paper: #1e1612;
  --paper-deep: #2d201a;
  --wood: #6b4a2e;
  --ink: #d4b483;
  --ink-soft: #8b7355;
}

/* ============================================
    RESPONSIVE
    ============================================ */
@container bookshelf (max-width: 720px) {
  #bookshelf-wrapper { padding: 28px 14px; }
  .bs-surface { gap: 4px; min-height: 150px; }
  #bookshelf-wrapper { --gap: 4px; }
}

@container bookshelf (max-width: 480px) {
  #bookshelf-wrapper {
    padding: 20px 10px;
    --slot-w-min: 22px;
    --book-h-min: 60px;
  }
  .bs-surface {
    overflow-x: auto;
    overflow-y: hidden;
    justify-content: flex-start;
    padding-bottom: 4px;
    scrollbar-width: thin;
  }
  .bs-surface::-webkit-scrollbar { height: 4px; }
  .bs-surface::-webkit-scrollbar-thumb { background: var(--ink); border-radius: 2px; }
  .bs-board { font-size: 9px; letter-spacing: 2px; }
}