/* ============================================
   Pixia - AI Image Upscaler studio
   (upscale-image.html)
   Complements css/ai-tool.css (.at-* primitives)
   Scope: body.at-upscale
   ============================================ */

body.at-upscale {
  --up-accent: #06b6d4;
  --up-accent-2: #3b82f6;
  --up-shadow: 0 16px 34px -18px rgba(6, 182, 212, .75);
  --up-ease: var(--at-ease, cubic-bezier(.22, .61, .36, 1));
}

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

/* ---------- Layout ---------- */
body.at-upscale .up-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 390px;
  gap: 22px;
  align-items: start;
}
.up-main {
  min-width: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  /* Preview follows the page scroll (sticky) while the settings column scrolls. */
  position: sticky;
  inset-block-start: 84px;
  align-self: start;
}
.up-side {
  min-width: 0;
  display: grid;
  gap: 16px;
}
@media (max-width: 1060px) {
  body.at-upscale .up-layout { grid-template-columns: 1fr; }
  .up-main,
  .up-side { position: static; }
}

body.at-upscale .at-panel { min-height: 0; min-width: 0; }

.up-source-panel h2,
#upResultsPanel h2 {
  display: flex;
  align-items: center;
  gap: 9px;
  margin-block-end: 4px;
}
.up-count {
  margin-inline-start: auto;
  font-family: var(--font-primary);
  font-size: 12px;
  font-weight: 600;
  color: var(--text-tertiary);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 999px;
  padding: 3px 10px;
}

/* ---------- Source ---------- */
.up-source { display: flex; flex-direction: column; gap: 12px; min-height: 0; }

.up-source-panel {
  display: flex;
  flex-direction: column;
  min-height: 0;
  max-height: 620px;
  overflow: hidden;
}
.up-source-panel .up-source { flex: 1 1 auto; min-height: 0; overflow: hidden; }

.up-drop {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  text-align: center;
  padding: 30px 20px;
  border: 1.6px dashed var(--glass-border-hover);
  border-radius: var(--at-radius-lg);
  background: var(--glass-bg);
  cursor: pointer;
  transition: border-color .2s var(--up-ease), background .2s var(--up-ease);
}
.up-drop:hover { border-color: var(--up-accent); }
.up-drop:focus-visible { outline: 2px solid var(--up-accent); outline-offset: 2px; }
.up-drop.drag {
  border-color: var(--up-accent);
  background: color-mix(in srgb, var(--up-accent) 12%, var(--glass-bg));
}
.up-drop input { position: absolute; opacity: 0; pointer-events: none; }
.up-drop-icon {
  width: 50px; height: 50px;
  display: grid; place-items: center;
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(6, 182, 212, .18), rgba(59, 130, 246, .18));
  color: #0891b2;
}
.up-drop-icon svg { width: 25px; height: 25px; }
.up-drop-title { font-family: var(--font-display); font-size: 1.02rem; font-weight: 600; color: var(--text-primary); }
.up-drop-sub {font-size: 12.5px;color: var(--text-tertiary);line-height: 1.55;min-height: 39px;}
.up-drop-meta { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px; margin-block-start: 4px; }
.up-drop-meta span {
  font-size: 11px; font-weight: 600;
  color: var(--text-tertiary);
  background: var(--bg-secondary);
  border: 1px solid var(--glass-border);
  border-radius: 999px;
  padding: 3px 10px;
}

.up-files { display: none; gap: 10px; }
.up-files[data-has="1"] { display: flex; flex-direction: column; flex: 1 1 auto; min-height: 0; }
#upFileItems { flex: 1 1 auto; min-height: 0; overflow-y: auto; overscroll-behavior: contain; }

.up-file-row {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px;
  padding: 9px 11px;
  border: 1px solid var(--glass-border);
  border-radius: var(--at-radius-md);
  background: var(--glass-bg);
  cursor: pointer;
  transition: border-color .2s var(--up-ease), background .2s var(--up-ease);
  margin-top: 10px;
}
.up-file-row:hover { border-color: var(--glass-border-hover); }
.up-file-row.is-active {
  border-color: var(--up-accent);
  background: color-mix(in srgb, var(--up-accent) 10%, var(--glass-bg));
}
.up-file-row.is-error { border-color: color-mix(in srgb, #ef4444 55%, var(--glass-border)); }
.up-file-thumb {
  width: 44px; height: 44px;
  flex: 0 0 44px;
  border-radius: 9px;
  object-fit: contain;
  background-color: var(--bg-secondary);
  background-image:
    linear-gradient(45deg, var(--glass-border) 25%, transparent 25%),
    linear-gradient(-45deg, var(--glass-border) 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, var(--glass-border) 75%),
    linear-gradient(-45deg, transparent 75%, var(--glass-border) 75%);
  background-size: 12px 12px;
  background-position: 0 0, 0 6px, 6px -6px, -6px 0;
}
.up-file-thumb.up-thumb-load {
  display: grid;
  place-items: center;
  background-image: none;
  background-color: var(--bg-secondary);
}
.up-ring {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  border: 2px solid var(--glass-border-hover);
  border-top-color: var(--up-accent);
  animation: up-ring-spin .7s linear infinite;
}
.up-file-thumb.up-spin-queued .up-ring {
  border-top-color: var(--text-muted);
  opacity: .55;
  animation-duration: 1.1s;
}
.up-file-thumb.up-spin-active .up-ring { border-width: 2.5px; }
@keyframes up-ring-spin { to { transform: rotate(360deg); } }
@media (prefers-reduced-motion: reduce) { .up-ring { animation-duration: 1.4s; } .up-ring-prog { animation-duration: 1.6s !important; } }

.up-ring-prog {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: conic-gradient(var(--up-accent) calc(var(--up-p, 0) * 1%), var(--glass-border-hover) 0);
  -webkit-mask: radial-gradient(farthest-side, transparent calc(100% - 3px), #000 calc(100% - 3px));
  mask: radial-gradient(farthest-side, transparent calc(100% - 3px), #000 calc(100% - 3px));
  transition: background .18s linear;
}
.up-thumb-prog.is-wait .up-ring-prog {
  background: conic-gradient(transparent 0 72%, var(--up-accent) 72% 100%);
  animation: up-ring-spin .8s linear infinite;
}

.up-file-info { min-width: 0; display: grid; gap: 2px; }
.up-file-name { font-size: 13px; font-weight: 600; color: var(--text-primary); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.up-file-meta { font-size: 11.5px; color: var(--text-muted); font-variant-numeric: tabular-nums; }
.up-file-rm {
  border: 0; background: transparent; color: var(--text-muted);
  padding: 6px; border-radius: 8px; cursor: pointer;
  display: inline-flex;
  transition: color .2s var(--up-ease), background .2s var(--up-ease);
}
.up-file-rm:hover { color: #ef4444; background: color-mix(in srgb, #ef4444 12%, transparent); }
.up-file-rm svg { width: 15px; height: 15px; }

.up-files-actions { display: flex; gap: 8px; flex: 0 0 auto; }
.up-mini {
  flex: 1;
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  padding: 8px 12px;
  border: 1px solid var(--glass-border);
  border-radius: 999px;
  background: var(--glass-bg);
  color: var(--text-secondary);
  font: 600 12.5px/1 var(--font-primary);
  cursor: pointer;
  transition: color .2s var(--up-ease), border-color .2s var(--up-ease);
}
.up-mini svg { width: 14px; height: 14px; }
.up-mini:hover { color: var(--text-primary); border-color: var(--glass-border-hover); }
.up-mini-danger:hover { color: #ef4444; border-color: color-mix(in srgb, #ef4444 45%, transparent); }

/* ---------- Settings ---------- */
.up-field { margin-block-start: 16px; }
.up-field:first-of-type { margin-block-start: 0; }
.up-legend {
  display: block;
  font-size: 12.5px; font-weight: 600; letter-spacing: .02em;
  color: var(--text-secondary); margin-block-end: 9px;
}
.up-hint { margin: 8px 0 0; font-size: 11.5px; line-height: 1.5; color: var(--text-muted); }
.up-keys { text-align: center; margin-block-start: 12px; }
.up-provider-note { padding: 8px 10px; border-radius: 10px; border: 1px solid var(--glass-border); }
.up-provider-note.is-cpu { color: #b45309; border-color: color-mix(in srgb, #f59e0b 45%, var(--glass-border)); background: color-mix(in srgb, #f59e0b 10%, transparent); }
.up-provider-note.is-gpu { color: #047857; border-color: color-mix(in srgb, #10b981 45%, var(--glass-border)); background: color-mix(in srgb, #10b981 10%, transparent); }

.up-select {
  display: block;
  width: 100%;
  padding: 11px 13px;
  border-radius: var(--at-radius-md);
  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;
}
.up-select option { color: var(--text-primary); background-color: var(--bg-secondary); }
.up-select:focus { border-color: var(--up-accent); }

.up-seg {
  display: flex;
  gap: 6px;
  padding: 4px;
  border: 1px solid var(--glass-border);
  border-radius: 999px;
  background: var(--glass-bg);
}
.up-seg button {
  flex: 1;
  min-width: 0;
  padding: 9px 8px;
  border: 0;
  border-radius: 999px;
  background: transparent;
  color: var(--text-secondary);
  font: 600 13px/1 var(--font-primary);
  cursor: pointer;
  white-space: nowrap;
  transition: color .2s var(--up-ease), background .2s var(--up-ease);
}
.up-seg button:hover { color: var(--text-primary); }
.up-seg button.is-active {
  background: linear-gradient(135deg, #06b6d4, #3b82f6);
  color: #fff;
}

.up-range { width: 100%; accent-color: var(--up-accent); }
.up-range-row { display: flex; align-items: center; gap: 12px; }
.up-range-out {
  min-width: 34px; text-align: end;
  font-size: 13px; color: var(--text-tertiary);
  font-variant-numeric: tabular-nums;
}

/* ---------- Stage / preview ---------- */
.up-stage-panel { display: flex; flex-direction: column; }
.up-stage-head { display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; gap: 12px; margin-block-end: 12px; }
.up-stage-head h2 { margin: 0; }
.up-zoom { justify-self: end; display: inline-flex; gap: 4px; padding: 3px; border-radius: 999px; border: 1px solid var(--glass-border); background: var(--glass-bg); }
.up-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 .2s var(--up-ease), background .2s var(--up-ease);
}
.up-zoom-btn:hover { color: var(--text-primary); }
.up-zoom-btn.is-active { background: var(--bg-card-hover); color: var(--text-primary); }
.up-zoom-btn svg { width: 15px; height: 15px; }

.up-view {
  display: inline-flex;
  justify-self: center;
  gap: 4px;
  padding: 3px;
  border-radius: 999px;
  border: 1px solid var(--glass-border);
  background: var(--glass-bg);
}
.up-view-btn {
  appearance: none;
  border: 0;
  background: transparent;
  color: var(--text-tertiary);
  font: 600 12.5px/1 var(--font-primary);
  padding: 7px 14px;
  border-radius: 999px;
  cursor: pointer;
  transition: color .2s var(--up-ease), background .2s var(--up-ease);
}
.up-view-btn:hover:not(:disabled) { color: var(--text-primary); }
.up-view-btn:disabled { opacity: .5; cursor: not-allowed; }
.up-view-btn.is-active {
  background: linear-gradient(135deg, #06b6d4, #3b82f6);
  color: #fff;
}

.up-stage {
  position: relative;
  flex: 1;
  min-height: 380px;
  max-height: min(770px, calc(100vh - 240px));
  display: flex;
  padding: 16px;
  border-radius: var(--at-radius-lg);
  border: 1px solid var(--glass-border);
  background:
    repeating-conic-gradient(rgba(128, 128, 128, .16) 0% 25%, transparent 0% 50%) 50% / 22px 22px;
  overflow: auto;
}
.up-stage-empty {
  display: grid;
  place-items: center;
  gap: 8px;
  text-align: center;
  color: var(--text-tertiary);
  font-size: 13.5px;
  line-height: 1.6;
  max-width: 34ch;
  margin: auto;
}
.up-stage-empty svg { width: 44px; height: 44px; color: var(--text-muted); }
.up-stage-empty strong { font-size: 15px; color: var(--text-secondary); font-weight: 600; }

.up-canvas-wrap { position: relative; margin: auto; }
.up-canvas-wrap img { display: block; max-width: 100%; max-height: 738px; border-radius: 8px; }

/* ---------- Compare slider ---------- */
.up-cmp {
  position: relative;
  margin: auto;
  line-height: 0;
  max-width: 100%;
  user-select: none;
  -webkit-user-select: none;
}
.up-cmp-before {
  display: block;
  max-width: 100%;
  max-height: 738px;
  border-radius: 8px;
}
.up-cmp-after {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border-radius: 8px;
  will-change: clip-path;
}
.up-cmp-line {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 2px;
  margin-inline-start: -1px;
  background: rgba(255, 255, 255, .95);
  box-shadow: 0 0 0 1px rgba(0, 0, 0, .25), 0 0 12px rgba(0, 0, 0, .35);
  pointer-events: none;
}
.up-cmp-line::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 30px; height: 30px;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  background: rgba(255, 255, 255, .96);
  border: 1px solid var(--glass-border);
  box-shadow: 0 4px 14px rgba(0, 0, 0, .3);
}
.up-cmp-tag {
  position: absolute;
  top: 10px;
  font: 600 11px/1 var(--font-primary);
  color: #fff;
  background: rgba(0, 0, 0, .55);
  border-radius: 999px;
  padding: 4px 10px;
  pointer-events: none;
}
.up-cmp-tag-a { left: 10px; }
.up-cmp-tag-b { right: 10px; }
.up-cmp-range {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  margin: 0;
  opacity: 0;
  cursor: ew-resize;
  -webkit-appearance: none;
  appearance: none;
  background: transparent;
}
.up-cmp-range::-webkit-slider-thumb { -webkit-appearance: none; width: 40px; height: 40px; }
.up-cmp-range::-moz-range-thumb { width: 40px; height: 40px; border: 0; background: transparent; }

/* ---------- Info strip ---------- */
.up-info {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
  margin-block-start: 12px;
}
.up-info-cell {
  display: grid;
  gap: 2px;
  padding: 9px 11px;
  border: 1px solid var(--glass-border);
  border-radius: var(--at-radius-md);
  background: var(--glass-bg);
  min-width: 0;
}
.up-info-k { font-size: 10.5px; font-weight: 600; letter-spacing: .03em; text-transform: uppercase; color: var(--text-muted); }
.up-info-v { font-size: 13.5px; font-weight: 700; color: var(--text-primary); font-variant-numeric: tabular-nums; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.up-info-v.is-up { color: #0891b2; }
.up-info-v.is-down { color: #16a34a; }

/* ---------- Results ---------- */
.up-results {
  display: grid;
  gap: 8px;
}
.up-result {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px;
  padding: 9px 11px;
  border: 1px solid var(--glass-border);
  border-radius: var(--at-radius-md);
  background: var(--glass-bg);
  cursor: pointer;
  transition: border-color .2s var(--up-ease);
}
.up-result:hover { border-color: var(--glass-border-hover); }
.up-result.is-active { border-color: var(--up-accent); box-shadow: 0 0 0 3px color-mix(in srgb, var(--up-accent) 18%, transparent); }
.up-result-thumb {
  width: 44px; height: 44px;
  display: block;
  overflow: hidden;
  border-radius: 9px;
  background-color: var(--bg-secondary);
  background-image:
    linear-gradient(45deg, var(--glass-border) 25%, transparent 25%),
    linear-gradient(-45deg, var(--glass-border) 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, var(--glass-border) 75%),
    linear-gradient(-45deg, transparent 75%, var(--glass-border) 75%);
  background-size: 12px 12px;
  background-position: 0 0, 0 6px, 6px -6px, -6px 0;
}
.up-result-thumb img { width: 100%; height: 100%; object-fit: contain; display: block; }
.up-result-info { min-width: 0; display: grid; gap: 2px; }
.up-result-name { font-size: 13px; font-weight: 600; color: var(--text-primary); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.up-result-meta { font-size: 11.5px; color: var(--text-muted); font-variant-numeric: tabular-nums; }
.up-result-dl {
  display: inline-flex; align-items: center; gap: 5px;
  padding: 7px 12px;
  border: 1px solid var(--glass-border);
  border-radius: 999px;
  background: var(--glass-bg);
  color: var(--text-primary);
  font: 600 11.5px/1 var(--font-primary);
  cursor: pointer;
  transition: border-color .2s var(--up-ease);
}
.up-result-dl:hover { border-color: var(--up-accent); }
.up-result-dl svg { width: 14px; height: 14px; }
.up-download-all { width: 100%; margin-block-start: 14px; justify-content: center; }

/* ---------- Run / progress ---------- */
.up-run-actions { display: grid; gap: 10px; }
.up-run-btn { width: 100%; }
.up-cancel {
  width: 100%;
  padding: 11px 12px;
  border: 1px solid color-mix(in srgb, #ef4444 45%, var(--glass-border));
  border-radius: 999px;
  background: var(--glass-bg);
  color: #ef4444;
  font: 600 13px/1 var(--font-primary);
  cursor: pointer;
  transition: background .2s var(--up-ease);
}
.up-cancel:hover { background: color-mix(in srgb, #ef4444 10%, var(--glass-bg)); }
.up-progress {display: grid;gap: 8px;margin-top: 20px;}
.up-progress-track { height: 8px; border-radius: 999px; background: var(--bg-tertiary); overflow: hidden; }
.up-progress-fill {
  display: block; height: 100%; width: 0;
  border-radius: 999px;
  background: linear-gradient(90deg, #06b6d4, #3b82f6);
  transition: width .25s var(--up-ease);
}
.up-progress-msg { font-size: 12.5px; color: var(--text-tertiary); }

/* ---------- Responsive ---------- */
@media (max-width: 560px) {
  .up-stage { min-height: 260px; }
  .up-stage-head { grid-template-columns: 1fr auto; }
  .up-stage-head h2 { grid-column: 1; grid-row: 1; }
  .up-zoom { grid-column: 2; grid-row: 1; }
  .up-view { grid-column: 1 / -1; grid-row: 2; margin-block-start: 4px; }
  .up-canvas-wrap img, .up-cmp-before { max-height: 320px; }
  .up-info { grid-template-columns: repeat(2, 1fr); }
}

/* ---------- RTL ---------- */
[dir="rtl"] .up-file-meta, [dir="rtl"] .up-result-meta { direction: ltr; text-align: start; }
[dir="rtl"] .up-cmp-line { margin-inline-start: 0; }