@charset "UTF-8";
:root {
  font-family: "Segoe UI", "Microsoft YaHei", sans-serif;
  font-synthesis: none; color-scheme: light;
  --bg: #f6f7f5; --surface: #fff; --text: #27312a; --line: #dfe4dc;
  --muted: #677264; --accent: #34714a; --soft: #e4efdd; --button: #2f4836;
  --checker-a: #f8f9f6; --checker-b: #edf0e9;
  --error: #b64e36;
  color: var(--text); background: var(--bg);
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #101112; --surface: #191b1d; --text: #e5e7e6; --line: #36393b;
  --muted: #a8ada9; --accent: #9fcead; --soft: #293d30; --button: #375b43;
  --checker-a: #1c1e20; --checker-b: #242729;
  --error: #f39884;
}
* { box-sizing: border-box; }
body { margin: 0; }
button, input, select { font: inherit; }
button, select, summary { cursor: pointer; }
button { color: inherit; }
a { color: inherit; text-decoration: none; }
[hidden] { display: none !important; }
button:disabled { opacity: .45; cursor: not-allowed; }
fieldset:disabled { opacity: .65; }
:is(button, a, select, input, summary, [role="button"]):focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
.topbar { height: 58px; padding: 0 24px; display: flex; align-items: center; justify-content: space-between; gap: 12px; border-bottom: 1px solid var(--line); background: var(--surface); }
.brand { font-size: 18px; font-weight: 650; letter-spacing: -.4px; }
.brand span { color: var(--accent); }
.brand:hover { color: var(--accent); }
.github-fab { position: fixed; right: max(18px, env(safe-area-inset-right)); bottom: max(18px, env(safe-area-inset-bottom)); z-index: 10; min-width: 120px; height: 48px; padding: 0 19px; display: flex; align-items: center; justify-content: center; gap: 10px; border: 1px solid var(--line); border-radius: 999px; background: var(--surface); color: var(--text); font-size: 15px; font-weight: 600; letter-spacing: -.2px; line-height: 1; white-space: nowrap; box-shadow: 0 3px 12px #00000014; }
.github-fab svg { width: 24px; height: 24px; flex-shrink: 0; }
.github-fab:hover { background: var(--soft); color: var(--accent); }
.github-header-link { position: static; min-width: 0; height: 34px; padding: 0 12px; gap: 7px; font-size: 13px; box-shadow: none; }
.github-header-link svg { width: 18px; height: 18px; }
.top-actions { display: flex; align-items: center; flex-shrink: 0; gap: 8px; }
.icon-button { display: flex; align-items: center; justify-content: center; gap: 5px; width: 36px; height: 34px; padding: 7px; border: 1px solid var(--line); border-radius: 6px; background: var(--surface); }
.icon-button:hover { background: var(--soft); }
.icon-button svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; flex-shrink: 0; }
.language-button { width: auto; font-size: 11px; }
.sun-icon, [data-theme="dark"] .moon-icon { display: none; }
[data-theme="dark"] .sun-icon { display: block; }
main { max-width: 1800px; margin: auto; padding: 14px 24px 84px; display: grid; grid-template-columns: 260px minmax(0, 1fr); column-gap: 18px; align-items: start; }
.preview-section { grid-column: 2; grid-row: 1; min-width: 0; }
main > .diagnostics { grid-column: 2; min-width: 0; }
.preview-toolbar { display: flex; justify-content: flex-end; gap: 16px; margin-bottom: 12px; }
.preview-toolbar label { display: flex; align-items: center; gap: 8px; white-space: nowrap; }
.preview-toolbar select { width: auto; margin: 0; height: 30px; font-size: 12px; }
.preview-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 16px; }
.preview-panel { --preview-gain: 120px; min-width: 0; overflow: hidden; background: var(--surface); border: 1px solid var(--line); border-radius: 10px; display: flex; flex-direction: column; }
.panel-heading { display: flex; align-items: center; justify-content: space-between; padding: 13px 16px; border-bottom: 1px solid var(--line); gap: 8px; min-height: 46px; }
.panel-heading h1, .panel-heading h2 { margin: 0; font-size: 14px; font-weight: 600; }
.panel-heading > span { color: var(--muted); font-size: 12px; font-variant-numeric: tabular-nums; white-space: nowrap; }
.image-viewport { position: relative; flex-shrink: 0; }
.image-stage { height: calc(clamp(280px, 48vh, 600px) + var(--preview-gain)); overflow: hidden; overscroll-behavior: contain; display: flex; position: relative; padding: 12px; user-select: none; }
.image-stage img { image-rendering: pixelated; display: block; position: absolute; top: 0; left: 0; margin: 0; max-width: none; max-height: none; cursor: grab; }
.image-stage.panning, #original-stage.panning, .image-stage.panning img { cursor: grabbing; }
#original-stage { cursor: pointer; }
#original-stage:hover { box-shadow: inset 0 0 0 2px var(--line); }
#original-stage.dragover { box-shadow: inset 0 0 0 3px var(--accent); }
#original-stage[aria-disabled="true"] { cursor: wait; }
.checker { background-color: var(--checker-a); background-image: conic-gradient(var(--checker-b) 25%, transparent 0 50%, var(--checker-b) 0 75%, transparent 0); background-size: 20px 20px; }
.white { background: white; color: #606c5c; }
.dark { background: #292d2a; color: #bac3b8; }
.placeholder { margin: auto; display: flex; flex-direction: column; align-items: center; text-align: center; gap: 10px; color: var(--muted); font-size: 13px; }
.white .placeholder, .dark .placeholder { color: inherit; }
.placeholder strong { font-size: 13px; font-weight: 500; }
.upload-icon { font-size: 32px; font-weight: 300; }
.panel-footer { min-height: 40px; padding: 8px 16px; display: flex; align-items: center; justify-content: space-between; gap: 8px; border-top: 1px solid var(--line); font-size: 12px; color: var(--muted); }
.panel-footer > span:first-child { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.panel-footer > div { display: flex; gap: 12px; flex-shrink: 0; }
.text-button { border: 0; padding: 2px 0; background: none; color: var(--muted); font-size: 12px; }
.text-button:hover:not(:disabled) { color: var(--accent); }
.panel-actions { display: flex; justify-content: center; gap: 10px; flex-wrap: wrap; padding: 14px 16px; margin-top: auto; }
.run-button, .upload-button, .download-button, .secondary-download, .cancel-button { display: inline-flex; align-items: center; justify-content: center; min-height: 36px; border-radius: 6px; padding: 0 20px; border: 1px solid var(--line); font-size: 13px; white-space: nowrap; }
.run-button { min-width: 108px; background: var(--button); border-color: var(--button); color: white; }
.upload-button { min-width: 108px; background: var(--soft); color: var(--accent); }
.cancel-button { background: var(--surface); color: var(--error); }
.download-button { background: var(--soft); color: var(--accent); cursor: pointer; }
.secondary-download { background: var(--surface); color: var(--muted); }
.result-summary { display: flex; flex-wrap: wrap; gap: 12px 30px; padding: 12px 2px 0; font-size: 12px; }
.result-summary > div { display: flex; align-items: baseline; gap: 8px; }
.result-summary span { color: var(--muted); }
.result-summary strong { font-size: 13px; font-weight: 550; font-variant-numeric: tabular-nums; white-space: nowrap; }
.controls { grid-column: 1; grid-row: 1 / span 4; background: var(--surface); border: 1px solid var(--line); border-radius: 10px; padding: 17px 16px; min-width: 0; }
fieldset { padding: 0; border: 0; margin: 0; min-width: 0; }
.color-settings { border-top: 1px solid var(--line); margin-top: 18px; padding-top: 18px; }
.color-settings .section-title { flex-wrap: wrap; gap: 8px; }
.section-title { display: flex; justify-content: space-between; align-items: center; margin-bottom: 14px; }
.section-title h2 { font-size: 13px; font-weight: 600; margin: 0; }
label { font-size: 12px; color: var(--muted); display: block; min-width: 0; }
select, input[type="number"] { width: 100%; height: 36px; margin-top: 7px; border: 1px solid var(--line); border-radius: 6px; padding: 0 10px; color: var(--text); background: var(--surface); font-size: 13px; min-width: 0; }
.basic-settings { display: grid; grid-template-columns: minmax(0, 1fr); align-items: end; gap: 16px; }
.check-settings { display: flex; flex-direction: column; gap: 0; margin-top: 10px; }
.check { display: flex; align-items: center; gap: 8px; min-height: 36px; cursor: pointer; }
.check input { width: 15px; height: 15px; margin: 0; accent-color: var(--accent); flex-shrink: 0; }
.fixed-size-setting { display: grid; grid-template-columns: auto minmax(0, 1fr); align-items: center; gap: 8px; }
.fixed-size-setting .check { gap: 6px; white-space: nowrap; }
.fixed-size-inputs { display: grid; grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr); align-items: center; gap: 4px; color: var(--muted); font-size: 12px; }
.fixed-size-inputs input { height: 32px; margin: 0; padding: 0 4px; font-size: 12px; appearance: textfield; }
.fixed-size-inputs input::-webkit-inner-spin-button, .fixed-size-inputs input::-webkit-outer-spin-button { appearance: none; margin: 0; }
.fixed-size-inputs input:disabled, .advanced input:disabled { opacity: .5; }
/* Space between the alpha checkbox and the color limit below it. */
.color-settings .alpha-option { min-height: 24px; margin-bottom: 8px; }
.custom-field { max-width: 220px; margin-top: 14px; }
.field-hint { font-size: 11px; color: var(--muted); margin: 7px 0 0; }
.advanced { margin-top: 10px; }
summary { font-size: 12px; color: var(--muted); width: fit-content; }
.advanced-settings { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; max-width: 600px; margin-top: 15px; }
.export-settings { border-top: 1px solid var(--line); padding: 12px 16px 0; }
.export-settings > label { display: flex; justify-content: space-between; color: var(--text); }
.export-settings output { font-weight: 600; }
.range-row { display: flex; align-items: center; gap: 14px; margin-top: 8px; font-size: 11px; color: var(--muted); }
input[type="range"] { flex: 1; min-width: 0; margin: 0; accent-color: var(--accent); cursor: pointer; height: 24px; }
.zoom-controls { position: absolute; top: 8px; right: 8px; z-index: 2; display: flex; align-items: center; gap: 4px; padding: 3px 5px; max-width: calc(100% - 16px); background: var(--surface); border: 1px solid var(--line); border-radius: 6px; }
.zoom-controls output { min-width: 42px; text-align: center; font-size: 11px; font-variant-numeric: tabular-nums; }
.zoom-controls button { white-space: nowrap; }
.zoom-controls .text-button { padding-inline: 4px; }
.zoom-step { width: 24px; height: 24px; padding: 0; flex-shrink: 0; border: 0; border-radius: 4px; background: transparent; color: var(--text); font-size: 16px; }
.zoom-step:hover:not(:disabled), .color-step:hover:not(:disabled) { background: var(--soft); }
.color-limit-heading { display: flex; justify-content: space-between; align-items: center; gap: 8px; font-size: 12px; color: var(--muted); line-height: 16px; height: 16px; }
.color-value { position: relative; flex: none; height: 16px; }
.value-size { visibility: hidden; }
.color-value output, #color-editor { position: absolute; inset: 0; text-align: right; }
#color-editor { left: -28px; display: flex; align-items: center; gap: 2px; }
#colors-number { flex: 1; width: 0; height: 16px; margin: 0; padding: 0; border: 0; border-radius: 0; font: inherit; line-height: 16px; text-align: center; color: var(--text); background: transparent; appearance: textfield; }
#colors-number::-webkit-inner-spin-button, #colors-number::-webkit-outer-spin-button { appearance: none; margin: 0; }
.color-step { flex: 0 0 12px; width: 12px; height: 16px; padding: 0; border: 0; background: transparent; font: inherit; line-height: 16px; color: var(--text); }
.color-limit output { color: var(--text); font-variant-numeric: tabular-nums; }
.color-track { position: relative; padding-bottom: 23px; margin-top: 8px; }
.color-track::before { content: ""; position: absolute; top: 10px; left: 8px; right: 8px; height: 4px; background: var(--line); border-radius: 2px; }
.color-track input { width: 100%; position: relative; z-index: 1; background: transparent; appearance: none; }
.color-track input::-webkit-slider-runnable-track { height: 4px; background: transparent; }
.color-track input::-webkit-slider-thumb { appearance: none; width: 16px; height: 16px; margin-top: -6px; border: 2px solid var(--surface); border-radius: 50%; background: var(--accent); }
.color-track input::-moz-range-track { height: 4px; background: transparent; }
.color-track input::-moz-range-thumb { width: 12px; height: 12px; border: 2px solid var(--surface); border-radius: 50%; background: var(--accent); }
.color-stops { position: absolute; inset: 0 8px; pointer-events: none; font-size: 10px; color: var(--muted); }
.color-stops > span { position: absolute; top: 8px; display: flex; flex-direction: column; align-items: center; gap: 9px; white-space: nowrap; }
.color-stops i { width: 8px; height: 8px; border: 1px solid var(--muted); background: var(--surface); border-radius: 50%; }
.unlimited-stop { left: 0; transform: translateX(-4px); align-items: flex-start !important; }
.minimum-stop { left: 20%; transform: translateX(-50%); }
.maximum-stop { right: -4px; align-items: flex-end !important; }
.status-strip { display: flex; align-items: flex-start; gap: 8px; padding: 0 16px 8px; min-height: 28px; font-size: 12px; line-height: 1.6; color: var(--muted); }
.status-icon { display: inline-block; flex-shrink: 0; }
#status { min-width: 0; overflow-wrap: anywhere; }
.status-strip.busy .status-icon { animation: spin 1.5s linear infinite; }
.status-strip.error { color: var(--error); }
.diagnostics { background: var(--surface); border: 1px solid var(--line); border-radius: 10px; padding: 16px; }
.diagnostic-tabs { display: flex; flex-wrap: wrap; gap: 8px; margin: 15px 0; }
.diagnostic-tabs button { border: 1px solid var(--line); background: var(--surface); border-radius: 5px; font-size: 12px; padding: 6px 12px; }
.diagnostic-tabs button.active { background: var(--soft); border-color: var(--accent); }
.diagnostic-preview { overflow: auto; max-height: 650px; background: #20232b; border-radius: 6px; }
.diagnostic-preview img { width: 100%; height: auto; display: block; image-rendering: pixelated; }
@keyframes spin { to { transform: rotate(360deg); } }
@media (max-width: 1050px) {
  main { grid-template-columns: 220px minmax(0, 1fr); column-gap: 12px; padding-inline: 14px; }
  .controls { padding: 15px 12px; }
  .preview-panel { --preview-gain: 142px; }
  .run-button, .upload-button { min-width: 92px; padding-inline: 8px; }
}
@media (max-width: 760px) {
  .topbar { height: 54px; padding: 0 12px; gap: 6px; }
  .brand { font-size: 15px; }
  .top-actions { gap: 5px; }
  .github-header-link { padding-inline: 8px; gap: 5px; font-size: 12px; }
  main { display: flex; flex-direction: column; padding: 12px 12px 84px; }
  main > * { width: 100%; }
  .preview-toolbar { gap: 10px; }
  .preview-toolbar label { font-size: 11px; gap: 5px; }
  .preview-grid { gap: 10px; }
  .preview-panel { --preview-gain: 123px; }
  .image-stage { height: calc(clamp(220px, 34vh, 320px) + var(--preview-gain)); padding: 6px; }
  .panel-heading { padding: 9px; flex-wrap: wrap; min-height: 58px; align-content: center; gap: 3px; }
  .panel-heading h1, .panel-heading h2 { font-size: 13px; width: 100%; }
  .panel-heading > span { font-size: 10px; }
  .panel-footer { padding: 7px 9px; font-size: 10px; gap: 4px; flex-wrap: wrap; }
  .panel-footer > div { gap: 7px; }
  .status-strip { padding: 0 9px 6px; font-size: 11px; }
  .text-button { font-size: 11px; }
  .placeholder, .placeholder strong { font-size: 11px; }
  .result-summary { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; font-size: 10px; }
  .result-summary > div { gap: 5px; flex-wrap: wrap; }
  .result-summary strong { font-size: 11px; }
  .controls { padding: 15px 13px; margin-top: 16px; }
  .basic-settings { grid-template-columns: 1fr; gap: 13px; }
  .panel-actions { padding: 4px 9px 10px; gap: 6px; }
  .run-button, .upload-button, .download-button, .secondary-download, .cancel-button { padding: 0 10px; font-size: 12px; }
  .run-button, .upload-button { width: min(80px, calc((100% - 6px) / 2)); min-width: 0; padding-inline: 2px; }
  .zoom-controls { top: 5px; right: 5px; max-width: calc(100% - 10px); flex-wrap: wrap; justify-content: flex-end; gap: 1px; padding: 2px; }
  .zoom-controls output { min-width: 35px; font-size: 10px; }
  .zoom-controls .text-button { font-size: 10px; }
  .zoom-step { width: 20px; }
  .export-settings { padding: 10px 9px 0; }
  .range-row { gap: 6px; }
}
@media (prefers-reduced-motion: reduce) { * { animation: none !important; } }