/* The editor's layout (index.html and the tool pages). Shared tokens, header and buttons are in site.css. */
/* Layout: workbench — photo stage fills the left, a narrow tool rail on the right; rail drops below the stage on phones. */

.app{display:grid;grid-template-columns:minmax(0,1fr) 296px;gap:16px;max-width:1320px;margin:0 auto;align-items:start}
@media (max-width:880px){.app{grid-template-columns:minmax(0,1fr)}}

.stage{position:relative;background:var(--stage);border-radius:12px;min-height:280px;display:flex;align-items:center;justify-content:center;
  padding:14px;background-image:radial-gradient(var(--dot) 1px, transparent 1px);background-size:14px 14px;overflow:hidden}
.stage.drag{outline:2px dashed var(--accent);outline-offset:-8px}
#view{display:block;max-width:100%;max-height:74vh;width:auto;height:auto;touch-action:none;cursor:none;border-radius:4px;box-shadow:0 1px 3px rgba(0,0,0,.18)}
#ring{position:absolute;left:0;top:0;border:1.5px solid #fff;border-radius:50%;pointer-events:none;mix-blend-mode:difference;transform:translate(-50%,-50%)}
.hint{position:absolute;left:14px;bottom:10px;font-size:12px;color:var(--muted);pointer-events:none}
/* Compare: an overlay over the photo with the divider and Before / After tags; the canvas draws the split itself. */
.comparing #view{cursor:ew-resize}
/* Dragging on the photo or the divider must never select text or the photo (a blue highlight on phones). */
.stage{-webkit-user-select:none;user-select:none;-webkit-touch-callout:none;-webkit-tap-highlight-color:transparent}
#split{position:absolute;pointer-events:none}
#split .line{position:absolute;top:0;bottom:0;width:2px;margin-left:-1px;background:#fff;box-shadow:0 0 0 1px rgba(0,0,0,.25)}
#splitHandle{position:absolute;top:50%;left:50%;width:32px;height:32px;margin:-16px 0 0 -16px;border-radius:50%;background:#fff;
  box-shadow:0 1px 4px rgba(0,0,0,.35);pointer-events:auto;cursor:ew-resize;touch-action:none;display:flex;align-items:center;justify-content:center;color:#333}
#splitHandle:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
#split .tag{position:absolute;top:8px;font-size:11px;font-weight:600;letter-spacing:.06em;text-transform:uppercase;
  color:#fff;background:rgba(0,0,0,.55);padding:3px 7px;border-radius:4px}
#split .before{left:8px}
#split .after{right:8px}

.rail{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:16px;display:flex;flex-direction:column;gap:18px}
.group{display:flex;flex-direction:column;gap:8px}
.label{font-size:11px;font-weight:600;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);display:flex;justify-content:space-between;align-items:baseline}
.label output{font-family:var(--mono);font-size:12px;letter-spacing:0;text-transform:none;color:var(--fg);font-variant-numeric:tabular-nums}
.tiles{display:grid;grid-template-columns:repeat(5,1fr);gap:6px}
.tile{position:relative;aspect-ratio:1;max-width:100%;border:1px solid var(--line);border-radius:8px;cursor:pointer;display:flex;align-items:center;justify-content:center;background:var(--bg)}
.tile input{position:absolute;opacity:0;inset:0;margin:0;cursor:pointer}
.tile i{pointer-events:none;display:block;width:72%;height:72%;background:var(--fg);-webkit-mask-size:contain;mask-size:contain;-webkit-mask-repeat:no-repeat;mask-repeat:no-repeat;-webkit-mask-position:center;mask-position:center}
.tile:has(input:checked){border-color:var(--accent);box-shadow:inset 0 0 0 1px var(--accent)}
.tile:has(input:checked) i{background:var(--accent)}
.brushname{font-size:12.5px;color:var(--muted)}
/* Filters: one swipeable row, a finishing touch rather than the main tool. Edges fade to hint at more. */
.looks{position:relative;display:flex;gap:8px;overflow-x:auto;overscroll-behavior-x:contain;scroll-snap-type:x proximity;scrollbar-width:thin;
  margin:0 -16px;padding:2px 16px 6px;scroll-padding-inline:16px;
  -webkit-mask-image:linear-gradient(90deg,transparent,#000 16px,#000 calc(100% - 28px),transparent);
  mask-image:linear-gradient(90deg,transparent,#000 16px,#000 calc(100% - 28px),transparent)}
.look{position:relative;flex:0 0 60px;min-width:0;scroll-snap-align:start;display:flex;flex-direction:column;align-items:center;gap:4px;cursor:pointer;font-size:11px;color:var(--muted);text-align:center;line-height:1.2}
.look span{width:100%;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
/* Mouse users get arrows (and the wheel scrolls the row); touch users swipe. */
.lookstrip{position:relative}
.lookarrow{display:none;position:absolute;top:16px;z-index:1;width:28px;height:28px;padding:0;border:1px solid var(--line);border-radius:50%;
  background:var(--surface);color:var(--fg);font-size:18px;line-height:1;cursor:pointer;box-shadow:0 1px 4px rgba(0,0,0,.15)}
.lookarrow.prev{left:-10px}
.lookarrow.next{right:-10px}
@media (hover:hover) and (pointer:fine){ .lookarrow:not([hidden]){display:block} }
.look input{position:absolute;opacity:0;inset:0;margin:0;cursor:pointer}
.look canvas{display:block;width:100%;aspect-ratio:1;border-radius:8px;border:1px solid var(--line);background:var(--bg)}
.look:has(input:checked){color:var(--fg);font-weight:500}
.look:has(input:checked) canvas{border-color:var(--accent);box-shadow:0 0 0 1px var(--accent)}
.look:has(input:focus-visible) canvas{outline:2px solid var(--accent);outline-offset:2px}
input[type=range]{width:100%;accent-color:var(--accent)}
.seg{display:grid;grid-template-columns:1fr 1fr;border:1px solid var(--line);border-radius:8px;overflow:hidden}
.seg label{position:relative;text-align:center;padding:7px 0;cursor:pointer;font-weight:500}
.seg input{position:absolute;opacity:0;inset:0;margin:0;cursor:pointer}
.seg label:has(input:checked){background:var(--accent);color:var(--accent-ink)}
.check{display:flex;align-items:center;gap:8px;cursor:pointer}
.check input{accent-color:var(--accent);width:16px;height:16px}
.keys{font-size:12px;color:var(--muted);border-top:1px solid var(--line);padding-top:12px;line-height:1.7}
kbd{font-family:var(--mono);font-size:11px;border:1px solid var(--line);border-bottom-width:2px;border-radius:4px;padding:0 5px;background:var(--bg)}

.faces{display:flex;flex-wrap:wrap;gap:6px}
.face{position:relative;width:46px;height:46px;padding:0;border:2px solid var(--line);border-radius:8px;overflow:hidden;background:var(--bg);cursor:pointer}
.face canvas{display:block;width:100%;height:100%}
.face[aria-pressed="true"]{border-color:var(--accent)}
.face[aria-pressed="true"] canvas{filter:blur(3px)}
.face span{position:absolute;right:2px;bottom:1px;font-family:var(--mono);font-size:10px;color:#fff;text-shadow:0 0 2px #000}
.face:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.status{margin:0;font-size:12.5px;color:var(--muted);min-height:1.2em}
.status.err{color:var(--danger)}
.btn.busy{opacity:.6;cursor:progress}
#exportPanel{max-width:1320px;margin:16px auto 0;background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:16px;display:flex;flex-direction:column;gap:10px}
#exportPanel img{max-width:100%;max-height:60vh;align-self:flex-start;border-radius:4px}
#exportPanel p{margin:0;color:var(--muted)}
.exrow{display:flex;align-items:center;gap:16px;flex-wrap:wrap}
.exrow .seg{width:140px}
#download{text-decoration:none}
#exportPanel{scroll-margin-top:96px}   /* clears the sticky header on phones */

/* Frequent actions: undo/redo/export in the header, mode/size/mask on the photo; settings in the rail. */
.actions{display:flex;gap:8px;align-items:center;flex-wrap:wrap}
.btn.icon{padding:8px 10px}
.btn.toggle[aria-pressed="true"]{background:var(--accent);color:var(--accent-ink);border-color:var(--accent)}
.btn.hl:not([aria-pressed="true"]){border-color:var(--accent);box-shadow:0 0 0 3px color-mix(in srgb, var(--accent) 30%, transparent)}   /* the page's main tool */
.btn.toggle[aria-pressed="true"]::before{content:"✓";font-weight:600}
.btn.quiet{justify-content:center;color:var(--danger)}
.btn.quiet:hover{border-color:var(--danger)}
.work{min-width:0;background:var(--surface);border:1px solid var(--line);border-radius:12px;overflow:hidden}
.work .stage{border-radius:0}
.toolbar{display:flex;align-items:center;gap:16px;flex-wrap:wrap;padding:8px 12px;border-bottom:1px solid var(--line);background:var(--surface)}
.toolbar .seg{width:170px}
.tsize{display:flex;align-items:center;gap:8px;flex:1;min-width:150px;max-width:320px;font-weight:500}
.tsize input{flex:1;min-width:0}
.tsize output{font-family:var(--mono);font-size:12px;min-width:48px;font-variant-numeric:tabular-nums}
#sheetBtn{display:none}
.rail{position:sticky;top:16px}
.adv summary{cursor:pointer;list-style:none}
.adv summary::-webkit-details-marker{display:none}
.adv summary::after{content:"+";font-family:var(--mono);font-size:14px;color:var(--fg)}
.adv[open] summary::after{content:"−"}
#more[open]{gap:18px}

/* Phones: header stays on top, painting controls become a bottom bar, settings open as a sheet above it. */
@media (max-width:880px){
  body{padding-bottom:calc(var(--tb-h, 96px) + 16px)}
  .top{position:sticky;top:0;z-index:8;background:var(--bg);margin:-16px -16px 12px;padding:10px 16px;border-bottom:1px solid var(--line)}
  .brand .title{font-size:21px}
  .brand .meta{display:none}   /* the photo size is in the export panel; the Android app link takes its place */
  .work{border-radius:12px}
  .toolbar{position:fixed;left:0;right:0;bottom:0;z-index:10;border-top:1px solid var(--line);border-bottom:0;gap:10px 12px;
    padding:8px max(16px, env(safe-area-inset-right, 0px)) calc(8px + env(safe-area-inset-bottom, 0px)) max(16px, env(safe-area-inset-left, 0px))}
  .toolbar .seg{width:150px}
  .tsize{order:5;flex-basis:100%;max-width:none}
  #sheetBtn{display:inline-flex;margin-left:auto}
  #view{max-height:calc(100dvh - var(--tb-h, 96px) - 120px)}
  .rail{position:fixed;left:0;right:0;top:auto;bottom:var(--tb-h, 96px);z-index:9;max-height:55dvh;overflow:auto;
    border-radius:12px 12px 0 0;border-bottom:0;box-shadow:0 -6px 24px rgba(0,0,0,.18);
    transform:translateY(calc(100% + var(--tb-h, 96px)));visibility:hidden;transition:transform .2s ease, visibility 0s .2s}
  .rail.open{transform:none;visibility:visible;transition:transform .2s ease}
  .keys{display:none}
}
/* Phones (<= 700 px): Blur background / Blur faces and Download in one tap under the photo, which gets the full width.
   The bottom bar is Blur/Restore, Undo/Redo, Settings and Size; Compare and Show mask move into Settings (script).
   Every control is at least 44 x 44 px. */
.quick,#railView{display:none}
@media (max-width:700px){
  .work{background:none;border:0;border-radius:0;overflow:visible}
  .work .stage{padding:0;background:none;min-height:200px}
  #view{max-height:calc(100dvh - var(--tb-h, 96px) - var(--hd-h, 64px) - var(--qk-h, 112px) - 32px)}
  .quick{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-top:12px}
  .quick .btn.toggle{min-height:52px;justify-content:center;font-size:15px;padding-inline:8px}
  .qline{grid-column:1/-1;display:flex;align-items:center;gap:12px}
  .qline .status{flex:1}
  #railView{display:flex}
  #export,#download2{display:none}   /* Download under the photo exports in one tap; the panel then offers PNG / JPG */
  .toolbar{gap:8px 8px}
  .toolbar .seg{width:140px}
  .btn.icon{min-width:44px;justify-content:center}
  .seg label{display:flex;align-items:center;justify-content:center;min-height:44px;padding:0}
  .check{min-height:44px}
  input[type=range]{height:44px;margin:0}
  .adv summary{display:flex;align-items:center;min-height:44px}
  #splitHandle{width:44px;height:44px;margin:-22px 0 0 -22px}
}

@media (prefers-reduced-motion:reduce){*{transition:none!important}}