/* ============================================
   Pixia - Photo Collage Studio
   (loaded only on collage.html)
   Complements css/ai-tool.css (.at-* primitives)
   Scope: body.at-collage
   Accent: indigo / violet
   ============================================ */

body.at-collage {
  --cl-accent: #6366f1;
  --cl-accent-2: #a855f7;
  --cl-accent-ink: #ffffff;
  --cl-shadow: 0 16px 34px -18px rgba(99, 102, 241, .7);
  --cl-ease: var(--at-ease, cubic-bezier(.22, .61, .36, 1));
}

body.at-collage [hidden] { display: none !important; }

/* Indigo accent replaces the shared identity. */
body.at-collage .at-kicker {
  background: linear-gradient(135deg, #6366f1, #a855f7);
  color: #ffffff;
}
body.at-collage .at-btn {
  color: #ffffff;
  box-shadow: var(--cl-shadow);
}
body.at-collage .at-btn-alt {
  background: var(--glass-bg);
  color: var(--text-primary);
  border: 1px solid var(--glass-border);
  box-shadow: none;
}
body.at-collage .at-drop-icon {
  background: linear-gradient(135deg, rgba(99, 102, 241, .18), rgba(168, 85, 247, .18));
  color: #4f46e5;
}

/* ---------- Layout: 3-column studio ---------- */
body.at-collage .cl-layout {
  display: grid;
  grid-template-columns: 300px minmax(0, 1fr) 300px;
  gap: 20px;
  align-items: start;
}

.cl-left,
.cl-right {
  min-width: 0;
  display: grid;
  gap: 16px;
  align-content: start;
}

.cl-center {
  min-width: 0;
  position: sticky;
  inset-block-start: 84px;
  align-self: start;
}

body.at-collage .at-panel { min-height: 0; min-width: 0; }
.cl-left .at-panel + .at-panel,
.cl-right .at-panel + .at-panel { margin-block-start: 0; }

.cl-panel h2 {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: 1.02rem;
  letter-spacing: -.015em;
}
.cl-panel-hint {
  margin: -4px 0 12px;
  font-size: 12.5px;
  line-height: 1.55;
  color: var(--text-tertiary);
}

/* ---------- Buttons / rows ---------- */
.cl-row { display: grid; gap: 10px; }
.cl-row-2 { grid-template-columns: 1fr 1fr; }
.cl-row-3 { grid-template-columns: 1fr 1fr 1fr; }

.cl-btn-grid { margin-block-start: 12px; display: grid; gap: 10px; grid-template-columns: 1fr 1fr; }
.cl-btn-grid .at-btn { width: 100%; padding: 12px 14px; font-size: 14px; }

.cl-ico-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  padding: 10px 8px;
  border-radius: var(--at-radius-md, 12px);
  border: 1px solid var(--glass-border);
  background: var(--glass-bg);
  color: var(--text-primary);
  font: inherit;
  font-size: 12.5px;
  font-weight: 600;
  cursor: pointer;
  transition: border-color .15s, background .15s, transform .12s;
  min-width: 0;
}
.cl-ico-btn svg { width: 16px; height: 16px; flex: none; }
.cl-ico-btn span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.cl-ico-btn:hover:not(:disabled) { border-color: var(--cl-accent); background: color-mix(in srgb, var(--cl-accent) 9%, var(--glass-bg)); }
.cl-ico-btn:active:not(:disabled) { transform: translateY(1px); }
.cl-ico-btn.is-active { border-color: var(--cl-accent); background: color-mix(in srgb, var(--cl-accent) 14%, var(--glass-bg)); color: var(--cl-accent); }
.cl-ico-btn:disabled { opacity: .45; cursor: not-allowed; }

/* ---------- Dropzone ---------- */
.cl-drop {
  display: grid;
  place-items: center;
  gap: 8px;
  text-align: center;
  padding: 24px 16px;
  border-radius: var(--at-radius-lg, 18px);
  border: 1.5px dashed var(--glass-border);
  background: var(--glass-bg);
  color: var(--text-tertiary);
  font-size: 13px;
  line-height: 1.6;
  cursor: pointer;
  transition: border-color .15s, background .15s;
}
.cl-drop:hover, .cl-drop.is-over { border-color: var(--cl-accent); background: color-mix(in srgb, var(--cl-accent) 8%, var(--glass-bg)); color: var(--cl-accent); }
.cl-drop svg { width: 32px; height: 32px; }
.cl-drop strong { font-weight: 700; color: var(--text-secondary); display: block; }
.cl-drop em { font-style: normal; font-size: 12px; opacity: .85; }

/* ---------- Library thumbnails ---------- */
.cl-library { margin-block-start: 12px; display: grid; grid-template-columns: repeat(auto-fill, minmax(62px, 1fr)); gap: 9px; }
.cl-lib-empty { margin-block-start: 10px; font-size: 12.5px; color: var(--text-muted); line-height: 1.55; }

.cl-thumb {
  position: relative;
  aspect-ratio: 1;
  border-radius: 12px;
  overflow: hidden;
  border: 2px solid transparent;
  background: color-mix(in srgb, var(--text-primary) 6%, transparent);
  cursor: grab;
  padding: 0;
}
.cl-thumb img { width: 100%; height: 100%; object-fit: cover; display: block; pointer-events: none; }
.cl-thumb:active { cursor: grabbing; }
.cl-thumb.is-in-use { border-color: var(--cl-accent); }
.cl-thumb.is-placed::after {
  content: "";
  position: absolute;
  inset-block-start: 5px;
  inset-inline-start: 5px;
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--cl-accent);
  box-shadow: 0 0 0 2px #fff;
}
.cl-thumb-del {
  position: absolute;
  inset-block-start: 3px;
  inset-inline-end: 3px;
  width: 20px; height: 20px;
  display: grid; place-items: center;
  border: 0; border-radius: 50%;
  background: rgba(17, 24, 39, .72);
  color: #fff; cursor: pointer;
  opacity: 0; transition: opacity .15s;
  padding: 0;
}
.cl-thumb-del svg { width: 12px; height: 12px; }
.cl-thumb:hover .cl-thumb-del { opacity: 1; }

/* ---------- Layouts palette ---------- */
.cl-layouts { display: grid; grid-template-columns: repeat(auto-fill, minmax(56px, 1fr)); gap: 9px; }
.cl-lo {
  aspect-ratio: 1;
  border-radius: 12px;
  border: 1.5px solid var(--glass-border);
  background: var(--glass-bg);
  cursor: pointer;
  padding: 7px;
  display: grid;
  transition: border-color .15s, background .15s, transform .12s;
}
.cl-lo svg { width: 100%; height: 100%; display: block; }
.cl-lo rect { fill: currentColor; opacity: .5; }
.cl-lo:hover { border-color: var(--cl-accent); transform: translateY(-1px); }
.cl-lo.is-active { border-color: var(--cl-accent); background: color-mix(in srgb, var(--cl-accent) 12%, var(--glass-bg)); color: var(--cl-accent); }
.cl-lo.is-active rect { opacity: 1; }

/* ---------- Templates ---------- */
.cl-templates { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.cl-template {
  border: 1.5px solid var(--glass-border);
  border-radius: 14px;
  background: var(--glass-bg);
  padding: 9px;
  cursor: pointer;
  display: grid;
  gap: 7px;
  transition: border-color .15s, transform .12s, background .15s;
}
.cl-template:hover { border-color: var(--cl-accent); transform: translateY(-2px); }
.cl-template.is-active { border-color: var(--cl-accent); background: color-mix(in srgb, var(--cl-accent) 9%, var(--glass-bg)); }
.cl-template-preview {
  aspect-ratio: 1;
  border-radius: 9px;
  display: grid;
  gap: 3px;
  padding: 6px;
  overflow: hidden;
}
.cl-template-preview i { border-radius: 2px; background: color-mix(in srgb, var(--cl-accent) 55%, #fff); display: block; }
.cl-template-name { font-size: 12px; font-weight: 600; color: var(--text-secondary); text-align: center; }

/* ---------- Fields / controls ---------- */
.cl-field { margin-block-start: 14px; }
.cl-field:first-child { margin-block-start: 0; }

.cl-legend { display: block; font-size: 12.5px; font-weight: 600; letter-spacing: .02em; color: var(--text-secondary); margin-block-end: 9px; }

.cl-range-row { display: flex; align-items: center; gap: 12px; }
.cl-range-row input[type="range"] { flex: 1; accent-color: var(--cl-accent); }
.cl-range-row output { min-width: 44px; text-align: end; font-size: 12.5px; color: var(--text-tertiary); font-variant-numeric: tabular-nums; }

.cl-input, .cl-select {
  width: 100%;
  padding: 11px 13px;
  border-radius: var(--at-radius-md, 12px);
  border: 1px solid var(--glass-border);
  background: var(--glass-bg);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 14px;
  outline: 0;
  color-scheme: light dark;
}
.cl-select option { color: var(--text-primary); background-color: var(--bg-secondary); }
.cl-input:focus, .cl-select:focus { border-color: var(--cl-accent); }

.cl-colors { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.cl-color-cell {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 9px 12px;
  border-radius: var(--at-radius-md, 12px);
  border: 1px solid var(--glass-border);
  background: var(--glass-bg);
}
.cl-color-cell > span { font-size: 13px; font-weight: 600; color: var(--text-secondary); }
.cl-color-cell input[type="color"] {
  width: 38px; height: 28px;
  padding: 0; border: 0; border-radius: 8px;
  background: none; cursor: pointer;
}

.cl-check { display: flex; align-items: center; gap: 9px; font-size: 13.5px; color: var(--text-secondary); cursor: pointer; }
.cl-check input { accent-color: var(--cl-accent); width: 16px; height: 16px; }

.cl-switch { display: flex; align-items: center; gap: 10px; font-size: 13.5px; color: var(--text-secondary); cursor: pointer; }
.cl-switch input { position: absolute; opacity: 0; pointer-events: none; }
.cl-switch i {
    position: relative;
    width: 38px; height: 22px;
    flex: 0 0 auto;
    border-radius: 999px;
    background: var(--bg-secondary);
    transition: background .2s ease;
}
.cl-switch i::after {
    content: "";
    position: absolute;
    inset-block-start: 3px;
    inset-inline-start: 3px;
    width: 16px; height: 16px;
    border-radius: 50%;
    background: #fff;
    box-shadow: 0 1px 2px rgba(0, 0, 0, .3);
    transition: transform .2s ease;
}
.cl-switch input:checked + i { background: var(--cl-accent); }
.cl-switch input:checked + i::after { transform: translateX(16px); }
[dir="rtl"] .cl-switch input:checked + i::after { transform: translateX(-16px); }
.cl-switch input:focus-visible + i { outline: 2px solid var(--cl-accent); outline-offset: 2px; }
.cl-switch input:disabled + i { opacity: .45; }
.cl-switch input:disabled ~ span { opacity: .6; }

.cl-hint { margin: 9px 0 0; font-size: 12px; line-height: 1.55; color: var(--text-muted); }

/* ---------- Segmented control ---------- */
.cl-seg {display: flex;gap: 6px;margin-bottom: 10px;}
.cl-seg button {
  flex: 1 1 0;
  padding: 9px 6px;
  border: 1px solid var(--glass-border);
  border-radius: 10px;
  background: var(--glass-bg);
  color: var(--text-secondary);
  font: 600 12.5px/1.15 var(--font-primary);
  cursor: pointer;
  transition: color .15s, border-color .15s, background .15s;
  white-space: nowrap;
}
.cl-seg button:hover { color: var(--text-primary); border-color: var(--glass-border-hover); }
.cl-seg button.is-active {
  color: var(--cl-accent);
  border-color: var(--cl-accent);
  background: color-mix(in srgb, var(--cl-accent) 10%, var(--glass-bg));
}
.cl-filter-presets { flex-wrap: wrap; }
.cl-filter-presets button { flex: 1 1 30%; }

/* ---------- Aspect ratio buttons ---------- */
.cl-aspect { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; }

.cl-aspect-btn {
  aspect-ratio: 1;
  border: 1.5px solid var(--glass-border);
  border-radius: 11px;
  background: var(--glass-bg);
  cursor: pointer;
  display: grid;
  place-items: center;
  align-content: center;
  gap: 5px;
  padding: 6px;
  transition: border-color .15s, background .15s, transform .12s;
}
.cl-aspect-btn:hover { border-color: var(--cl-accent); transform: translateY(-1px); }
.cl-aspect-btn.is-active { border-color: var(--cl-accent); background: color-mix(in srgb, var(--cl-accent) 10%, var(--glass-bg)); color: var(--cl-accent); }
.cl-aspect-box { width: 24px; height: 24px; border: 2px solid currentColor; border-radius: 5px; opacity: .55; }
.cl-aspect-btn.is-active .cl-aspect-box { opacity: 1; }
.cl-aspect-btn span { font-size: 11px; font-weight: 700; color: var(--text-secondary); }
.cl-aspect-btn.is-active span { color: var(--cl-accent); }

/* ---------- Stage / canvas ---------- */
.cl-stage-panel { display: flex; flex-direction: column; }
.cl-stage-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-block-end: 12px; }
.cl-stage-head h2 { margin: 0; }
.cl-zoom { display: inline-flex; gap: 4px; padding: 3px; border-radius: 999px; border: 1px solid var(--glass-border); background: var(--glass-bg); }
.cl-zoom-btn {
  min-width: 30px; height: 28px; padding: 0 10px;
  display: inline-flex; align-items: center; justify-content: center;
  border: 0; border-radius: 999px; background: transparent;
  color: var(--text-secondary); font: 600 12px/1 var(--font-primary); cursor: pointer;
  transition: color .15s, background .15s;
}
.cl-zoom-btn:hover { color: var(--text-primary); }
.cl-zoom-btn.is-active { background: var(--bg-card-hover); color: var(--text-primary); }
.cl-zoom-btn svg { width: 15px; height: 15px; }

.cl-stage {
  position: relative;
  height: 621px;
  display: flex;
  padding: 18px;
  border-radius: var(--at-radius-lg, 18px);
  border: 1px solid var(--glass-border);
  background:
    repeating-conic-gradient(rgba(128, 128, 128, .14) 0% 25%, transparent 0% 50%) 50% / 22px 22px;
  overflow: auto;
}
.cl-canvas-wrap { position: relative; margin: auto; line-height: 0; }
.cl-canvas {
  display: block;
  border-radius: 4px;
  box-shadow: 0 18px 50px -20px rgba(15, 23, 42, .45);
  touch-action: none;
}
.cl-canvas.is-pannable { cursor: grab; }
.cl-canvas.is-panning { cursor: grabbing; }
.cl-canvas.is-swap { cursor: move; }
.cl-stage.is-dragover .cl-canvas { outline: 2px dashed var(--cl-accent); outline-offset: 6px; }

.cl-stage-badge {
  position: absolute;
  inset-block-start: 12px;
  inset-inline-end: 12px;
  padding: 5px 10px;
  border-radius: 999px;
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: .02em;
  color: #fff;
  background: linear-gradient(135deg, #6366f1, #a855f7);
  pointer-events: none;
  opacity: .92;
}
.cl-stage-foot { margin-block-start: 12px; display: grid; gap: 8px; }
.cl-stage-tools { display: flex; gap: 8px; flex-wrap: wrap; }

/* ---------- Selection (per-image) panel ---------- */
.cl-selection-empty { font-size: 13px; color: var(--text-muted); line-height: 1.6; padding: 4px 0; }

/* ---------- Export footer ---------- */
.cl-export { display: grid; gap: 12px; }
.cl-export-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.cl-actions-primary { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 9px; }
.cl-actions-primary .at-btn { width: 100%; padding: 13px 14px; font-size: 14px; }

/* ---------- Swap ghost ---------- */
.cl-ghost {
  position: fixed;
  z-index: 999;
  width: 84px; height: 84px;
  border-radius: 12px;
  overflow: hidden;
  pointer-events: none;
  border: 2px solid var(--cl-accent);
  box-shadow: 0 12px 30px -8px rgba(0, 0, 0, .4);
  display: none;
}
.cl-ghost img { width: 100%; height: 100%; object-fit: cover; display: block; }

/* ---------- Responsive ---------- */
@media (max-width: 1180px) {
  body.at-collage .cl-layout { grid-template-columns: 280px minmax(0, 1fr); }
  .cl-right { grid-column: 1 / -1; position: static; max-height: none; overflow: visible; }
}

@media (max-width: 860px) {
  body.at-collage .cl-layout { grid-template-columns: 1fr; }
  .cl-left { position: static; max-height: none; overflow: visible; }
  .cl-center { order: -1; }
  .cl-stage { height: 340px; }
  .cl-row-3 { grid-template-columns: 1fr 1fr; }
  .cl-actions-primary { grid-template-columns: 1fr 1fr; }
  .cl-actions-primary .at-btn[style*="span 2"] { grid-column: span 2; }
}

.ce-cp-wrap { display:inline-flex; align-items:center; gap:8px; }
.ce-cp-swatch:disabled { opacity:.5; cursor:default; }
.ce-cp-native { position:absolute; opacity:0; pointer-events:none; width:1px; height:1px; border:0; padding:0; margin:0; }

/* ---------- RTL safety ---------- */
[dir="rtl"] .cl-thumb-del { inset-inline-start: 3px; inset-inline-end: auto; }