/* ============================================================
   Folder Designer Lite — Frontend Styles
   ============================================================ */

:root {
  --fdl-accent:       #1e40af;
  --fdl-accent-hover: #1e3a8a;
  --fdl-accent-light: #eff6ff;
  --fdl-text:         #111827;
  --fdl-muted:        #6b7280;
  --fdl-border:       #e5e7eb;
  --fdl-radius:       8px;
  --fdl-font:         -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --fdl-transition:   .18s ease;
}

.fdl-app {
  font-family: var(--fdl-font);
  color: var(--fdl-text);
  display: flex;
  flex-direction: column;
  height: auto;
  min-height: 680px;
  border: 1px solid var(--fdl-border);
  border-radius: var(--fdl-radius);
  overflow: hidden;
  box-shadow: 0 4px 24px rgba(0,0,0,.08);
}

/* ── Top bar ── */
.fdl-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: .4rem .75rem;
  background: #fff;
  border-bottom: 1px solid var(--fdl-border);
  gap: .75rem;
  flex-shrink: 0;
  flex-wrap: wrap;
}
.fdl-topbar__dims {
  display: flex;
  align-items: center;
  gap: .25rem;
  font-size: .78rem;
  color: var(--fdl-muted);
}
.fdl-dim-lbl { font-weight: 600; }
.fdl-dim-input {
  width: 44px;
  text-align: center;
  border: 1px solid var(--fdl-border);
  border-radius: 4px;
  padding: .18rem .25rem;
  font-size: .78rem;
  background: #f9fafb;
}
.fdl-topbar__title {
  font-weight: 700;
  font-size: .9rem;
  color: var(--fdl-text);
}
.fdl-topbar__actions { display: flex; gap: .35rem; align-items: center; flex-wrap: wrap; }

.fdl-stbtn {
  padding: .28rem .65rem;
  border-radius: 4px;
  border: 1px solid var(--fdl-border);
  background: #fff;
  font-size: .75rem;
  cursor: pointer;
  color: var(--fdl-text);
  white-space: nowrap;
  transition: all var(--fdl-transition);
  font-family: var(--fdl-font);
}
.fdl-stbtn:hover       { background: var(--fdl-accent-light); }
.fdl-stbtn--del        { color: #dc2626; border-color: #fca5a5; }
.fdl-stbtn--del:hover  { background: #fef2f2; }
.fdl-stbtn--3d         { color: var(--fdl-accent); border-color: var(--fdl-accent); }
.fdl-stbtn--3d:hover   { background: var(--fdl-accent-light); }
.fdl-stbtn--download   { background: var(--fdl-accent); color: #fff; border-color: var(--fdl-accent); font-weight: 600; }
.fdl-stbtn--download:hover { background: var(--fdl-accent-hover); }

/* ── Body ── */
.fdl-body {
  display: flex;
  flex: 1;
  min-height: 580px;
  background: #e5e7eb;
}

/* Icon strip */
.fdl-iconbar {
  display: flex;
  flex-direction: column;
  align-items: center;
  background: #1e1b4b;
  width: 62px;
  flex-shrink: 0;
  padding: .4rem 0;
  gap: .05rem;
}
.fdl-sib {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: .18rem;
  width: 100%;
  padding: .55rem .2rem;
  background: transparent;
  border: none;
  cursor: pointer;
  color: rgba(255,255,255,.55);
  transition: all var(--fdl-transition);
  font-family: var(--fdl-font);
}
.fdl-sib:hover  { background: rgba(255,255,255,.1);  color: #fff; }
.fdl-sib.active { background: rgba(255,255,255,.15); color: #fff; }
.fdl-sib__icon  { font-size: 1.1rem; line-height: 1; display: block; }
.fdl-sib__label { font-size: .46rem; letter-spacing: .07em; text-transform: uppercase; line-height: 1; }

/* Sidebar panel */
.fdl-spanel {
  width: 210px;
  flex-shrink: 0;
  background: #fff;
  border-right: 1px solid var(--fdl-border);
  overflow-y: auto;
  padding: .65rem .7rem;
}
.fdl-sp { display: none; }
.fdl-sp.active { display: block; }

.fdl-sp-label {
  display: block;
  font-size: .68rem;
  font-weight: 700;
  color: var(--fdl-muted);
  text-transform: uppercase;
  letter-spacing: .05em;
  margin-bottom: .35rem;
}
.fdl-sp-hint {
  font-size: .72rem;
  color: var(--fdl-muted);
  margin-bottom: .5rem;
  line-height: 1.4;
}
.fdl-sp-divider { height: 1px; background: var(--fdl-border); margin: .65rem 0; }
.fdl-sp-select {
  width: 100%;
  padding: .3rem .4rem;
  border: 1px solid var(--fdl-border);
  border-radius: 4px;
  font-size: .78rem;
  margin-bottom: .45rem;
}
.fdl-sp-row {
  display: flex;
  align-items: center;
  gap: .35rem;
  margin-bottom: .35rem;
}
.fdl-sp-row--fmt { gap: .25rem; }
.fdl-sp-num {
  width: 55px;
  padding: .22rem .35rem;
  border: 1px solid var(--fdl-border);
  border-radius: 4px;
  font-size: .78rem;
  text-align: center;
}
.fdl-fmt-btn {
  padding: .25rem .55rem;
  border: 1px solid var(--fdl-border);
  border-radius: 4px;
  background: #f9fafb;
  cursor: pointer;
  font-size: .85rem;
  transition: background var(--fdl-transition);
}
.fdl-fmt-btn:hover, .fdl-fmt-btn.active { background: var(--fdl-accent-light); border-color: var(--fdl-accent); }

/* Upload button */
.fdl-sp-upload-btn {
  display: block;
  width: 100%;
  padding: .55rem;
  background: var(--fdl-accent-light);
  border: 1px dashed var(--fdl-accent);
  border-radius: var(--fdl-radius);
  color: var(--fdl-accent);
  cursor: pointer;
  font-size: .82rem;
  text-align: center;
  transition: all var(--fdl-transition);
  margin-bottom: .45rem;
  font-family: var(--fdl-font);
}
.fdl-sp-upload-btn:hover { background: var(--fdl-accent); color: #fff; }

/* Text buttons */
.fdl-sp-text-h, .fdl-sp-text-b {
  display: block;
  width: 100%;
  padding: .5rem;
  background: #f9fafb;
  border: 1px solid var(--fdl-border);
  border-radius: var(--fdl-radius);
  cursor: pointer;
  text-align: center;
  margin-bottom: .35rem;
  transition: background var(--fdl-transition);
  font-family: var(--fdl-font);
}
.fdl-sp-text-h { font-size: .95rem; }
.fdl-sp-text-b { font-size: .78rem; }
.fdl-sp-text-h:hover, .fdl-sp-text-b:hover { background: var(--fdl-accent-light); }

/* Shape buttons */
.fdl-sp-shape {
  display: block;
  width: 100%;
  padding: .45rem .65rem;
  background: #f9fafb;
  border: 1px solid var(--fdl-border);
  border-radius: 4px;
  cursor: pointer;
  font-size: .82rem;
  text-align: left;
  margin-bottom: .3rem;
  transition: background var(--fdl-transition);
  font-family: var(--fdl-font);
}
.fdl-sp-shape:hover { background: var(--fdl-accent-light); }

/* Color swatches */
.fdl-color-swatches {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: .3rem;
  margin-bottom: .5rem;
}
.fdl-sw {
  width: 100%;
  aspect-ratio: 1;
  border-radius: 4px;
  border: 1px solid var(--fdl-border);
  cursor: pointer;
  transition: transform .15s;
}
.fdl-sw:hover { transform: scale(1.2); }
.fdl-sw.active { box-shadow: 0 0 0 2px var(--fdl-accent); }

/* Template grid */
.fdl-template-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: .4rem;
  margin-bottom: .75rem;
}
.fdl-tmpl-card {
  border: 2px solid var(--fdl-border);
  border-radius: 6px;
  overflow: hidden;
  cursor: pointer;
  transition: border-color var(--fdl-transition);
}
.fdl-tmpl-card img {
  width: 100%;
  height: 60px;
  object-fit: cover;
  display: block;
}
.fdl-tmpl-card span {
  display: block;
  font-size: .65rem;
  padding: 2px 4px;
  color: var(--fdl-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.fdl-tmpl-card:hover { border-color: var(--fdl-accent); }
.fdl-tmpl-card.active { border-color: var(--fdl-accent); box-shadow: 0 0 0 1px var(--fdl-accent); }
.fdl-tmpl-empty {
  grid-column: 1/-1;
  font-size: .75rem;
  color: var(--fdl-muted);
  text-align: center;
  padding: .75rem;
  background: #f9fafb;
  border-radius: 4px;
  line-height: 1.5;
}

/* Layers */
.fdl-layers-list { min-height: 60px; }

/* Canvas area */
.fdl-canvas-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  padding: 1.75rem 1rem 1.25rem 1.75rem; /* extra top+left for rulers */
  position: relative;
  overflow: auto;
  background: #e5e7eb;
}

/* Inch rulers — absolutely positioned by JS after canvas fits */
.fdlp-ruler-corner {
  position: absolute;
  width: 20px;
  height: 20px;
  background: #b8b8b8;
  pointer-events: none;
  z-index: 4;
  border-right: 1px solid #a0a0a0;
  border-bottom: 1px solid #a0a0a0;
}
.fdlp-ruler-h,
.fdlp-ruler-v {
  position: absolute;
  display: block;
  pointer-events: none;
  z-index: 4;
}
.fdlp-ruler-h { height: 20px; border-bottom: 1px solid #a0a0a0; }
.fdlp-ruler-v { width:  20px; border-right:  1px solid #a0a0a0; }
.fdl-dpi-badge {
  font-size: .68rem;
  color: rgba(255,255,255,.85);
  background: rgba(0,0,0,.38);
  padding: .18rem .6rem;
  border-radius: 20px;
  margin-top: .5rem;
  font-family: monospace;
  letter-spacing: .04em;
}
.fdl-canvas-loading {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(229,231,235,.8);
  font-size: .85rem;
  color: var(--fdl-muted);
  gap: .4rem;
  z-index: 5;
}
.fdl-spinner {
  width: 18px; height: 18px;
  border: 2px solid var(--fdl-border);
  border-top-color: var(--fdl-accent);
  border-radius: 50%;
  display: inline-block;
  animation: fdl-spin .7s linear infinite;
}
@keyframes fdl-spin { to { transform: rotate(360deg); } }

/* Right panel */
.fdl-right {
  width: 200px;
  flex-shrink: 0;
  background: #fff;
  border-left: 1px solid var(--fdl-border);
  padding: .75rem .65rem;
  display: flex;
  flex-direction: column;
  gap: .75rem;
  overflow: visible;
}
.fdl-right__header {
  font-size: .8rem;
  font-weight: 700;
  padding-bottom: .45rem;
  border-bottom: 1px solid var(--fdl-border);
}
.fdl-right__section { overflow: visible; }
.fdl-right__color-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: .78rem;
  margin-bottom: .35rem;
}
.fdl-right__swatch {
  width: 22px; height: 22px;
  border-radius: 4px;
  border: 1px solid var(--fdl-border);
}
.fdl-btn-download {
  display: block;
  width: 100%;
  padding: .65rem .5rem;
  background: var(--fdl-accent);
  color: #fff;
  border: none;
  border-radius: var(--fdl-radius);
  font-size: .82rem;
  font-weight: 700;
  cursor: pointer;
  text-align: center;
  line-height: 1.3;
  transition: background var(--fdl-transition);
  font-family: var(--fdl-font);
}
.fdl-btn-download:hover { background: var(--fdl-accent-hover); }
.fdl-right__note {
  font-size: .65rem;
  color: var(--fdl-muted);
  line-height: 1.4;
  margin: 0;
}
.fdl-right__download { margin-top: auto; }

/* 3D Modal */
.fdl-modal {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 9999;
  align-items: center;
  justify-content: center;
}
.fdl-modal.active { display: flex; }
.fdl-modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,.7);
}
.fdl-modal-box {
  position: relative;
  background: #1a1a2e;
  border-radius: 12px;
  padding: 1.5rem;
  width: min(600px, 95vw);
  z-index: 1;
}
.fdl-modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: #fff;
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 1rem;
}
.fdl-modal-close {
  background: none;
  border: none;
  color: rgba(255,255,255,.6);
  font-size: 1.4rem;
  cursor: pointer;
  line-height: 1;
}
.fdl-modal-close:hover { color: #fff; }

/* CSS 3D folder */
.fdl-3d-scene {
  perspective: 800px;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 360px;
}
.fdl-3d-folder {
  position: relative;
  width: 220px;
  height: 280px;
  transform-style: preserve-3d;
  transform: rotateX(-8deg) rotateY(-22deg);
  animation: fdl-float 4s ease-in-out infinite;
}
@keyframes fdl-float {
  0%,100% { transform: rotateX(-8deg) rotateY(-22deg); }
  50%      { transform: rotateX(-6deg) rotateY(-18deg) translateY(-6px); }
}
.fdl-3d-face {
  position: absolute;
  border: 1px solid rgba(0,0,0,.15);
  background-size: cover;
  background-position: center;
}
.fdl-3d-front {
  width: 220px; height: 280px;
  transform: translateZ(4px);
  background-color: #fff;
}
.fdl-3d-back {
  width: 220px; height: 280px;
  transform: translateZ(-4px) rotateY(180deg);
  background-color: #eee;
}
.fdl-3d-right {
  width: 8px; height: 280px;
  right: -4px;
  transform: rotateY(90deg) translateZ(110px);
  background: linear-gradient(to right, #ccc, #e0e0e0);
}
.fdl-3d-left {
  width: 8px; height: 280px;
  left: -4px;
  transform: rotateY(-90deg) translateZ(110px);
  background: #d0d0d0;
}
.fdl-3d-top {
  width: 220px; height: 8px;
  top: -4px;
  transform: rotateX(90deg) translateZ(140px);
  background: #e8e8e8;
}
.fdl-3d-bottom {
  width: 220px; height: 8px;
  bottom: -4px;
  transform: rotateX(-90deg) translateZ(140px);
  background: #ccc;
}

/* Mobile */
@media (max-width: 760px) {
  .fdl-body    { flex-wrap: wrap; min-height: auto; }
  .fdl-iconbar { flex-direction: row; width: 100%; height: auto; }
  .fdl-spanel, .fdl-right { width: 100%; }
  .fdl-canvas-area { min-height: 280px; }
}

/* ── CSS 3D open-folder viewer ── */
.fdlp-3d-scene {
  perspective: 550px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 200px;
  padding: .75rem .5rem .35rem;
  background: #d8dde6;
  border-radius: 8px;
  cursor: grab;
  overflow: hidden;
  position: relative;
}
.fdlp-3d-scene:active { cursor: grabbing; }

.fdlp-folder-outer {
  transform-style: preserve-3d;
  position: relative;
}

/* Shadow sits in the same 3D space below the folder */
.fdlp-folder-shadow {
  position: absolute;
  bottom: -14px;
  height: 10px;
  background: radial-gradient(ellipse, rgba(0,0,0,.22) 0%, transparent 75%);
  border-radius: 50%;
  pointer-events: none;
}

/* Open book: flex row of panels + spine */
.fdlp-open-book {
  display: flex;
  align-items: flex-start;
  transform-style: preserve-3d;
  position: relative;
}

/* Each panel */
.fdlp-book-panel {
  position: relative;
  transform-style: preserve-3d;
  flex-shrink: 0;
}

/* Inside face — faces viewer at rotateY=0° (inside view) */
.fdlp-face-inside {
  position: absolute;
  inset: 0;
  transform: translateZ(0.5px);
  border: 1px solid rgba(0,0,0,.08);
  backface-visibility: hidden;   /* invisible when outside face is toward viewer */
}

/* Outside face — faces viewer at rotateY=180° (outside/cover view) */
.fdlp-face-outside {
  position: absolute;
  inset: 0;
  transform: rotateY(180deg) translateZ(0.5px);
  background-size: 100% 100%;
  background-repeat: no-repeat;
  border: 1px solid rgba(0,0,0,.08);
  backface-visibility: hidden;   /* invisible when inside face is toward viewer */
}

/* Thin top/bottom edges (cardstock thickness) */
.fdlp-edge-top {
  position: absolute;
  top: -1px; left: 0; right: 0;
  height: 1px;
  transform: rotateX(90deg) translateZ(0.5px);
  transform-origin: top center;
}
.fdlp-edge-bot {
  position: absolute;
  bottom: -1px; left: 0; right: 0;
  height: 1px;
  transform: rotateX(-90deg) translateZ(0.5px);
  transform-origin: bottom center;
}

/* Spine strip between panels */
.fdlp-book-spine {
  flex-shrink: 0;
  transform-style: preserve-3d;
}

/* Hint text */
.fdlp-3d-hint {
  font-size: .6rem;
  color: rgba(0,0,0,.35);
  margin-top: .4rem;
  text-align: center;
  letter-spacing: .01em;
  pointer-events: none;
  flex-shrink: 0;
}

/* ── Style picker cards ── */
.fdlp-style-grid {
  display: flex;
  flex-direction: column;
  gap: .45rem;
  margin-bottom: .5rem;
}

.fdlp-style-card {
  border: 2px solid var(--fdl-border);
  border-radius: 8px;
  overflow: hidden;
  cursor: pointer;
  transition: border-color var(--fdl-transition), box-shadow var(--fdl-transition);
  background: #fff;
  padding: .4rem;
}
.fdlp-style-card:hover  { border-color: var(--fdl-accent); }
.fdlp-style-card.active { border-color: var(--fdl-accent); box-shadow: 0 0 0 2px var(--fdl-accent); }

.fdlp-style-thumb {
  width: 100%;
  display: block;
  margin-bottom: .3rem;
  border-radius: 4px;
  overflow: hidden;
}
.fdlp-style-thumb svg { display: block; width: 100%; height: auto; }

.fdlp-style-name {
  font-size: .76rem;
  font-weight: 700;
  color: var(--fdl-text);
  margin-bottom: .1rem;
}
.fdlp-style-desc {
  font-size: .65rem;
  color: var(--fdl-muted);
  line-height: 1.3;
}

[hidden] { display: none !important; }
.fdl-canvas-loading[hidden] { display: none !important; }