/* ============================================
   Pixia - Photo Filters Studio
   (loaded only on photo-filters.html)
   Complements css/ai-tool.css (.at-* primitives)
   Scope: body.at-photo-filters
   Accent: violet -> fuchsia
   ============================================ */

body.at-photo-filters {
  --pf-accent: #7c3aed;
  --pf-accent-2: #d946ef;
  --pf-accent-ink: #ffffff;
  --pf-shadow: 0 16px 34px -18px rgba(124, 58, 237, .7);
  --pf-line: var(--glass-border);
}

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

body.at-photo-filters .at-kicker {
  background: linear-gradient(135deg, var(--pf-accent), var(--pf-accent-2));
  color: #fff;
}
body.at-photo-filters .at-btn {
  background: linear-gradient(135deg, var(--pf-accent), var(--pf-accent-2));
  color: #fff;
  box-shadow: var(--pf-shadow);
}
body.at-photo-filters .at-btn-alt {
  background: var(--glass-bg);
  color: var(--text-primary);
  border: 1px solid var(--glass-border);
  box-shadow: none;
}
body.at-photo-filters .at-drop-icon {
  background: linear-gradient(135deg, rgba(124, 58, 237, .18), rgba(217, 70, 239, .18));
  color: var(--pf-accent-2);
}

/* ---------- Layout ---------- */
.pf-editor {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 366px;
  gap: 20px;
  align-items: start;
}
.pf-main,
.pf-side { min-width: 0; display: grid; gap: 16px; align-content: start; }
/* Preview follows the page scroll (sticky) while the controls column scrolls. */
.pf-main { position: sticky; inset-block-start: 84px; align-self: start; }
body.at-photo-filters .at-panel { min-height: 0; min-width: 0; }
.pf-main .at-panel + .at-panel,
.pf-side .at-panel + .at-panel { margin-block-start: 0; }

.pf-panel-hint {
  margin: -4px 0 14px;
  font-size: 12.5px;
  line-height: 1.55;
  color: var(--text-tertiary);
}

/* ---------- Drop ---------- */
.pf-drop {
  display: grid;
  place-items: center;
  gap: 8px;
  text-align: center;
  padding: 34px 18px;
  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, transform .15s;
}
.pf-drop:hover,
.pf-drop.is-dragover {
  border-color: var(--pf-accent);
  background: color-mix(in srgb, var(--pf-accent) 8%, var(--glass-bg));
  color: var(--text-secondary);
}
.pf-drop.is-dragover { transform: scale(1.01); }
.pf-drop svg { width: 38px; height: 38px; color: var(--pf-accent-2); }
.pf-drop strong { font-weight: 700; color: var(--text-secondary); display: block; font-size: 14px; }
.pf-drop em { font-style: normal; font-size: 12px; opacity: .9; }

/* ---------- Stage ---------- */
.pf-stage-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  margin-block-end: 12px;
}
.pf-stage-head h2 { margin: 0; font-family: var(--font-display); font-size: 1.02rem; letter-spacing: -.015em; }

.pf-views {
  display: flex;
  gap: 4px;
  padding: 3px;
  border-radius: 999px;
  border: 1px solid var(--glass-border);
  background: var(--glass-bg);
}
.pf-views button {
  padding: 7px 14px;
  border: 0;
  border-radius: 999px;
  background: transparent;
  color: var(--text-secondary);
  font: 600 12.5px/1 var(--font-primary);
  cursor: pointer;
  transition: color .15s, background .15s;
}
.pf-views button:hover { color: var(--text-primary); }
.pf-views button.is-active { background: var(--bg-card-hover); color: var(--text-primary); }
.pf-views button:disabled { opacity: .4; cursor: not-allowed; }

.pf-stage {
  position: relative;
  min-height: 420px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  border-radius: var(--at-radius-lg, 18px);
  border: 1px solid var(--glass-border);
  background: repeating-conic-gradient(rgba(128, 128, 128, .08) 0% 25%, transparent 0% 50%) 50% / 22px 22px;
  overflow: hidden;
}

.pf-stage-empty {
  display: grid;
  place-items: center;
  gap: 12px;
  text-align: center;
  color: var(--text-muted);
  font-size: 13.5px;
  line-height: 1.6;
  max-width: 40ch;
}
.pf-stage-empty svg { width: 58px; height: 58px; opacity: .55; }

.pf-compare {
  position: relative;
  display: inline-block;
  max-width: 100%;
  line-height: 0;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 12px 40px -18px rgba(0, 0, 0, .45);
  transform-origin: center center;
  will-change: transform;
}
.pf-compare.is-zoomed { cursor: grab; touch-action: none; }
.pf-stage.is-panning .pf-compare { cursor: grabbing; }
.pf-compare canvas {
  display: block;
  max-width: 100%;
  max-height: 60vh;
  width: auto;
  height: auto;
  border-radius: 8px;
}
.pf-compare .pf-canvas--before {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  max-width: none;
  max-height: none;
  border-radius: 0;
}
.pf-compare.is-before .pf-canvas--after { visibility: hidden; }
.pf-compare.is-after .pf-canvas--before { display: none; }
.pf-compare.is-split .pf-canvas--before { display: block; }

.pf-handle {
  position: absolute;
  inset-block: 0;
  width: calc(3px / var(--pf-zoom, 1));
  background: rgba(255, 255, 255, .92);
  box-shadow: 0 0 0 1px rgba(0, 0, 0, .28);
  cursor: ew-resize;
  z-index: 3;
  display: none;
  touch-action: none;
}
.pf-handle::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: calc(34px / var(--pf-zoom, 1));
  height: calc(34px / var(--pf-zoom, 1));
  transform: translate(-50%, -50%);
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 4px 14px rgba(0, 0, 0, .35);
}
.pf-handle::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: calc(16px / var(--pf-zoom, 1));
  height: calc(10px / var(--pf-zoom, 1));
  transform: translate(-50%, -50%);
  z-index: 1;
  background: no-repeat center/contain
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 10' fill='none' stroke='%2364748b' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M5 1L1 5l4 4M11 1l4 4-4 4'/%3E%3C/svg%3E");
}
.pf-compare.is-split .pf-handle { display: block; }

/* ---------- Zoom controls ---------- */
.pf-zoom {
  position: absolute;
  inset-inline-end: 12px;
  bottom: 12px;
  z-index: 4;
  display: flex;
  align-items: center;
  gap: 2px;
  padding: 4px;
  border-radius: 999px;
  border: 1px solid var(--glass-border);
  background: color-mix(in srgb, var(--bg-card, #fff) 80%, transparent);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow: 0 10px 26px -12px rgba(0, 0, 0, .5);
}
.pf-zoom button {
  display: grid;
  place-items: center;
  width: 30px;
  height: 30px;
  padding: 0;
  border: 0;
  border-radius: 999px;
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  transition: background .15s, color .15s;
}
.pf-zoom button:hover { background: var(--bg-card-hover); color: var(--text-primary); }
.pf-zoom button:disabled { opacity: .38; cursor: default; }
.pf-zoom button:disabled:hover { background: transparent; color: var(--text-secondary); }
.pf-zoom button svg { width: 16px; height: 16px; }
.pf-zoom .pf-zoom-val {
  width: auto;
  min-width: 48px;
  padding: 0 6px;
  font: 600 12px/1 var(--font-primary);
  font-variant-numeric: tabular-nums;
}
.pf-zoom-sep { width: 1px; height: 18px; background: var(--glass-border); margin: 0 3px; }

.pf-stage-meta {
  margin-block-start: 12px;
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  font-size: 12.5px;
  color: var(--text-tertiary);
}
.pf-stage-meta .pf-file {
  font-weight: 600;
  color: var(--text-secondary);
  max-width: 220px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.pf-chip {
  border: 1px solid var(--glass-border);
  background: var(--glass-bg);
  border-radius: 999px;
  padding: 3px 10px;
  font-variant-numeric: tabular-nums;
}
.pf-chip.pf-chip-accent {
  color: var(--pf-accent);
  border-color: color-mix(in srgb, var(--pf-accent) 45%, transparent);
  background: color-mix(in srgb, var(--pf-accent) 10%, transparent);
}

/* ---------- Filters panel ---------- */
.pf-panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  margin-block-end: 12px;
}
.pf-panel-head h2 { margin: 0; }

.pf-preset-search {
  position: relative;
  display: inline-flex;
  align-items: center;
}
.pf-preset-search svg {
  position: absolute;
  inset-inline-start: 10px;
  width: 15px;
  height: 15px;
  color: var(--text-muted);
  pointer-events: none;
}
.pf-preset-search input {
  padding: 8px 12px 8px 32px;
  border-radius: 999px;
  border: 1px solid var(--glass-border);
  background: var(--glass-bg);
  color: var(--text-primary);
  font: 500 12.5px/1 var(--font-primary);
  outline: 0;
  width: 170px;
}
[dir="rtl"] .pf-preset-search svg { left: auto; right: 10px; }
[dir="rtl"] .pf-preset-search input { padding: 8px 32px 8px 12px; }
.pf-preset-search input:focus { border-color: var(--pf-accent); }

.pf-cats {
  display: flex;
  gap: 7px;
  flex-wrap: wrap;
  margin-block-end: 14px;
}
.pf-cat {
  padding: 6px 13px;
  border-radius: 999px;
  border: 1px solid var(--glass-border);
  background: var(--glass-bg);
  color: var(--text-secondary);
  font: 600 12.5px/1 var(--font-primary);
  cursor: pointer;
  transition: color .15s, border-color .15s, background .15s;
}
.pf-cat:hover { color: var(--text-primary); border-color: var(--glass-border-hover); }
.pf-cat.is-active {
  color: #fff;
  border-color: transparent;
  background: linear-gradient(135deg, var(--pf-accent), var(--pf-accent-2));
}

.pf-presets {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(92px, 1fr));
  gap: 10px;
  max-height: 420px;
  overflow-y: auto;
  padding: 2px;
}
.pf-presets::-webkit-scrollbar { width: 6px; }
.pf-presets::-webkit-scrollbar-thumb { background: var(--glass-border); border-radius: 99px; }

.pf-preset {
  position: relative;
  display: grid;
  gap: 6px;
  padding: 0;
  border: 0;
  background: none;
  cursor: pointer;
  text-align: center;
}
.pf-preset-thumb {
  position: relative;
  width: 100%;
  aspect-ratio: 1 / 1;
  border-radius: 12px;
  overflow: hidden;
  border: 1.5px solid var(--glass-border);
  background: var(--bg-secondary);
  transition: border-color .15s, transform .15s, box-shadow .15s;
}
.pf-preset-thumb canvas,
.pf-preset-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.pf-preset-thumb .pf-preset-spin {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  color: var(--text-muted);
}
.pf-preset-thumb .pf-preset-spin::after {
  content: "";
  width: 16px;
  height: 16px;
  border-radius: 50%;
  border: 2px solid var(--glass-border-hover);
  border-top-color: var(--pf-accent);
  animation: at-spin .7s linear infinite;
}
.pf-preset:hover .pf-preset-thumb { transform: translateY(-2px); border-color: var(--glass-border-hover); }
.pf-preset.is-active .pf-preset-thumb {
  border-color: var(--pf-accent);
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--pf-accent) 45%, transparent);
}
.pf-preset.is-active .pf-preset-thumb::after {
  content: "";
  position: absolute;
  inset-block-start: 5px;
  inset-inline-end: 5px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--pf-accent) no-repeat center/11px 11px
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='3.4' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M20 6L9 17l-5-5'/%3E%3C/svg%3E");
  box-shadow: 0 2px 6px rgba(0, 0, 0, .35);
}
.pf-preset-name {
  font-size: 11.5px;
  font-weight: 600;
  color: var(--text-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.pf-preset.is-active .pf-preset-name { color: var(--text-primary); }

.pf-preset-empty {
  grid-column: 1 / -1;
  padding: 28px 0;
  text-align: center;
  font-size: 13px;
  color: var(--text-tertiary);
}

/* ---------- Adjustments ---------- */
.pf-group {
  border-block-start: 1px solid var(--glass-border);
}
.pf-group:first-of-type { border-block-start: 0; }
.pf-group > summary {
  display: flex;
  align-items: center;
  gap: 9px;
  cursor: pointer;
  list-style: none;
  padding: 13px 2px;
  font-size: 13.5px;
  font-weight: 700;
  color: var(--text-primary);
  user-select: none;
}
.pf-group > summary::-webkit-details-marker { display: none; }
.pf-group > summary::before {
  content: "";
  width: 7px;
  height: 7px;
  flex: 0 0 auto;
  border-inline-end: 2px solid var(--text-tertiary);
  border-block-end: 2px solid var(--text-tertiary);
  transform: rotate(-45deg);
  transition: transform .2s var(--at-ease, ease);
}
.pf-group[open] > summary::before { transform: rotate(45deg); }
.pf-group > summary svg { width: 16px; height: 16px; color: var(--pf-accent-2); }
.pf-group-body { padding-block-end: 14px; display: grid; gap: 12px; }

.pf-slider { display: grid; gap: 6px; }
.pf-slider-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}
.pf-slider-label {
  font-size: 12.5px;
  font-weight: 600;
  color: var(--text-secondary);
  cursor: default;
}
.pf-slider-val {
  font-size: 12px;
  color: var(--text-tertiary);
  font-variant-numeric: tabular-nums;
  min-width: 40px;
  text-align: end;
}
.pf-slider.dirty .pf-slider-val { color: var(--pf-accent); font-weight: 700; }

.pf-slider input[type="range"] {
  width: 100%;
  margin: 0;
  accent-color: var(--pf-accent);
  cursor: pointer;
}
.pf-slider input[type="range"].pf-range--hue {
  -webkit-appearance: none;
  appearance: none;
  height: 8px;
  border-radius: 999px;
  background: linear-gradient(90deg, #ff0000, #ffff00, #00ff00, #00ffff, #0000ff, #ff00ff, #ff0000);
}
.pf-slider input[type="range"].pf-range--hue::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: #fff;
  border: 2px solid rgba(0, 0, 0, .35);
  box-shadow: 0 1px 4px rgba(0, 0, 0, .35);
}
.pf-slider input[type="range"].pf-range--hue::-moz-range-thumb {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: #fff;
  border: 2px solid rgba(0, 0, 0, .35);
}

.pf-group-reset {
  margin-inline-start: auto;
  border: 0;
  background: none;
  color: var(--text-muted);
  font: 600 11px/1 var(--font-primary);
  cursor: pointer;
  padding: 3px 6px;
  border-radius: 6px;
  text-transform: uppercase;
  letter-spacing: .04em;
}
.pf-group-reset:hover { color: var(--pf-accent); background: color-mix(in srgb, var(--pf-accent) 10%, transparent); }

/* ---------- Intensity ---------- */
.pf-intensity {
  padding: 14px;
  border-radius: var(--at-radius-md, 12px);
  border: 1px solid color-mix(in srgb, var(--pf-accent) 30%, var(--glass-border));
  background: color-mix(in srgb, var(--pf-accent) 6%, var(--glass-bg));
  display: grid;
  gap: 10px;
}
.pf-intensity-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}
.pf-intensity-top strong { font-size: 13px; color: var(--text-primary); }
.pf-intensity-top span { font-size: 12px; color: var(--pf-accent); font-weight: 700; font-variant-numeric: tabular-nums; }

/* ---------- Export ---------- */
.pf-field { margin-block-start: 14px; }
.pf-field:first-child { margin-block-start: 0; }
.pf-legend { display: block; font-size: 12.5px; font-weight: 600; letter-spacing: .02em; color: var(--text-secondary); margin-block-end: 9px; }
.pf-seg { display: flex; gap: 6px; }
.pf-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;
}
.pf-seg button:hover { color: var(--text-primary); }
.pf-seg button.is-active {
  color: var(--pf-accent);
  border-color: var(--pf-accent);
  background: color-mix(in srgb, var(--pf-accent) 10%, var(--glass-bg));
}
.pf-range-row { display: flex; align-items: center; gap: 12px; }
.pf-range-row input[type="range"] { flex: 1; accent-color: var(--pf-accent); }
.pf-range-row output { min-width: 44px; text-align: end; font-size: 12.5px; color: var(--text-tertiary); font-variant-numeric: tabular-nums; }

.pf-actions { display: grid; gap: 9px; margin-block-start: 14px; }
.pf-actions .at-btn { width: 100%; }
.pf-actions-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 9px; }

.pf-progress { display: grid; gap: 8px; margin-block-start: 14px; }
.pf-progress-bar { height: 6px; border-radius: 99px; background: var(--glass-border); overflow: hidden; }
.pf-progress-fill { height: 100%; width: 0; border-radius: 99px; background: linear-gradient(90deg, var(--pf-accent), var(--pf-accent-2)); transition: width .2s ease; }
.pf-progress-msg { font-size: 12.5px; color: var(--text-tertiary); text-align: center; }

.pf-hint { margin: 10px 0 0; font-size: 12px; line-height: 1.55; color: var(--text-muted); }

/* ---------- Queue ---------- */
.pf-queue { display: grid; gap: 6px; max-height: 300px; overflow-y: auto; overflow-x: hidden; padding-inline-end: 4px; }
.pf-queue::-webkit-scrollbar { width: 5px; }
.pf-queue::-webkit-scrollbar-thumb { background: var(--glass-border); border-radius: 99px; }

.pf-queue-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 7px 9px;
  border-radius: 11px;
  border: 1.5px solid var(--glass-border);
  background: var(--glass-bg);
  cursor: pointer;
  transition: border-color .15s, background .15s;
  min-width: 0;
}
.pf-queue-item:hover { border-color: var(--glass-border-hover); }
.pf-queue-item.is-active { border-color: var(--pf-accent); background: color-mix(in srgb, var(--pf-accent) 8%, var(--glass-bg)); }
.pf-queue-thumb {
  width: 38px;
  height: 38px;
  border-radius: 8px;
  object-fit: cover;
  flex: none;
  background: repeating-conic-gradient(rgba(128, 128, 128, .12) 0% 25%, transparent 0% 50%) 50% / 10px 10px;
}
.pf-queue-info { flex: 1; min-width: 0; }
.pf-queue-name { display: block; font-size: 12.5px; font-weight: 600; color: var(--text-secondary); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.pf-queue-meta { display: flex; gap: 8px; align-items: center; margin-block-start: 2px; font-size: 11px; color: var(--text-muted); }
.pf-queue-del {
  flex: none;
  width: 24px;
  height: 24px;
  display: grid;
  place-items: center;
  border: 0;
  border-radius: 6px;
  background: transparent;
  color: var(--text-tertiary);
  cursor: pointer;
  padding: 0;
}
.pf-queue-del:hover { background: color-mix(in srgb, #ef4444 14%, transparent); color: #dc2626; }
.pf-queue-del svg { width: 14px; height: 14px; }

/* ---------- Badges strip ---------- */
.pf-badges {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 12px;
  margin-block-start: 52px;
}
.pf-badge {
  display: flex;
  align-items: flex-start;
  gap: 11px;
  padding: 16px;
  border-radius: var(--at-radius-lg, 18px);
  border: 1px solid var(--glass-border);
  background: var(--glass-bg);
}
.pf-badge svg { width: 22px; height: 22px; flex: 0 0 auto; color: var(--pf-accent); }
.pf-badge b { display: block; font-size: 13.5px; color: var(--text-primary); margin-block-end: 2px; }
.pf-badge span { font-size: 12.5px; line-height: 1.55; color: var(--text-tertiary); }

/* ---------- Responsive ---------- */
@media (max-width: 1080px) {
  .pf-editor { grid-template-columns: minmax(0, 1fr) 320px; }
}
@media (max-width: 900px) {
  .pf-editor { grid-template-columns: 1fr; }
  .pf-side { position: static; }
  .pf-main { position: static; }
  .pf-stage { min-height: 320px; }
  .pf-compare canvas { max-height: 46vh; }
}
@media (max-width: 560px) {
  .pf-presets { grid-template-columns: repeat(auto-fill, minmax(78px, 1fr)); }
  .pf-preset-search input { width: 130px; }
  .pf-actions-2 { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  .pf-preset-thumb,
  .pf-drop { transition: none !important; }
}