:root {
  --bg: #ffffff; --panel: #ffffff; --ink: #1d2230; --muted: #667085; --line: #e3e6ec;
  --accent: #ff5a1f; --accent-ink: #ffffff; --sel: #2f6bff; --danger: #d92d20;
  --check-a: #ffffff; --check-b: #e9ebf0;
  font: 14px/1.4 -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, sans-serif;
  color-scheme: light;
}
* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; background: var(--bg); color: var(--ink); }
button, select, input { font: inherit; color: inherit; }
button { background: var(--panel); border: 1px solid var(--line); border-radius: 8px; padding: 6px 12px; cursor: pointer; }
button:hover:not(:disabled) { border-color: var(--muted); }
button:disabled { opacity: .45; cursor: default; }
button.primary, .as-button.primary { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); font-weight: 600; }
button.ghost { background: transparent; }
select, input[type=number] { background: var(--panel); border: 1px solid var(--line); border-radius: 6px; padding: 4px 6px; }
[hidden] { display: none !important; }

/* the header: the EMB Pros logo on the left, the tools as tabs on the right, the open one in orange */
.top { height: 64px; display: flex; align-items: stretch; gap: 24px; padding: 0 0 0 24px; background: var(--panel);
  border-bottom: 1px solid var(--line); }
.brand { display: flex; align-items: center; flex: none; }
.brand img { height: 47px; width: auto; display: block; }
.logo { color: var(--accent); }
.nav { display: flex; align-items: stretch; margin-left: auto; min-width: 0; overflow-x: auto; scrollbar-width: none; }
.nav a { position: relative; display: flex; align-items: center; padding: 0 20px; color: var(--ink); text-decoration: none;
  font-size: 13px; font-weight: 650; letter-spacing: .04em; text-transform: uppercase; white-space: nowrap; transition: color .15s, background .15s; }
.nav a:hover { color: var(--accent); }
.nav a[aria-current=page] { background: var(--accent); color: var(--accent-ink); }
.nav a[aria-current=page]::after { content: ""; position: absolute; left: 50%; bottom: 9px; margin-left: -5px;
  border: 5px solid transparent; border-top-color: currentColor; border-bottom: 0; }
/* on a phone the tabs fold into a menu button (a checkbox and its label: no script needed); the list
   drops down under the header, the open tool in orange */
.nav-toggle { display: none; }
@media (max-width: 860px) {
  .top { position: relative; gap: 12px; padding: 0 4px 0 16px; }
  .brand img { height: 40px; }
  .nav-toggle { display: grid; place-items: center; width: 56px; margin-left: auto; cursor: pointer; color: var(--ink); }
  .nav-toggle span, .nav-toggle span::before, .nav-toggle span::after { display: block; width: 24px; height: 2px;
    border-radius: 1px; background: currentColor; transition: transform .2s, background .2s; }
  .nav-toggle span { position: relative; }
  .nav-toggle span::before, .nav-toggle span::after { content: ""; position: absolute; left: 0; }
  .nav-toggle span::before { top: -7px; }
  .nav-toggle span::after { top: 7px; }
  .nav-check:checked ~ .nav-toggle span { background: transparent; }
  .nav-check:checked ~ .nav-toggle span::before { transform: translateY(7px) rotate(45deg); }
  .nav-check:checked ~ .nav-toggle span::after { transform: translateY(-7px) rotate(-45deg); }
  .nav { display: none; position: absolute; top: 100%; left: 0; right: 0; z-index: 40; margin: 0; flex-direction: column;
    background: var(--panel); border-bottom: 1px solid var(--line); box-shadow: 0 10px 24px rgb(0 0 0 / .12); overflow: visible; }
  .nav-check:checked ~ .nav { display: flex; }
  .nav a { padding: 15px 20px; font-size: 14px; border-top: 1px solid var(--line); }
  .nav a[aria-current=page]::after { display: none; }
}
.file-info { color: var(--muted); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.top-actions { display: flex; gap: 10px; flex-wrap: wrap; justify-content: center; }
/* a page's buttons: a row at the top of its work area */
.stage-bar { position: absolute; top: 16px; left: 64px; right: 64px; z-index: 3; display: flex; flex-direction: column;
  align-items: center; gap: 6px; pointer-events: none; }
.stage-bar > * { pointer-events: auto; }
.stage-bar .top-actions button { min-width: 120px; height: 40px; padding: 0 18px; border-radius: 8px; font-weight: 600;
  background: var(--panel); box-shadow: 0 1px 2px rgb(0 0 0 / .06); }
.stage-bar .top-actions button.primary { background: var(--accent); color: var(--accent-ink); border-color: var(--accent);
  box-shadow: 0 2px 8px color-mix(in srgb, var(--accent) 35%, transparent); }
.stage-bar .file-info { font-size: 12px; max-width: 100%; }
.stage-bar .file-info:empty { display: none; }
.pt-stage:has(> .stage-bar) { padding-top: 96px; }
.toolbar .file-info { margin-left: auto; flex: 0 1 auto; }

.landing { max-width: 760px; margin: 0 auto; padding: 56px 16px; text-align: center; }
.landing h1 { font-size: 34px; margin: 0 0 8px; }
.sub { color: var(--muted); margin: 0 0 28px; }
.drop { display: flex; flex-direction: column; align-items: center; gap: 8px; padding: 56px 16px; border: 2px dashed var(--line); border-radius: 16px; background: var(--panel); cursor: pointer; transition: border-color .15s, background .15s; }
.drop.over { border-color: var(--accent); background: color-mix(in srgb, var(--accent) 7%, var(--panel)); }
.drop-icon { font-size: 34px; color: var(--accent); }
.drop-title { font-size: 20px; font-weight: 600; }
.drop-sub { color: var(--muted); margin-bottom: 8px; }
.as-button { display: inline-block; padding: 9px 18px; border-radius: 8px; }

.workspace { display: grid; grid-template-columns: 1fr 320px; height: calc(100% - 64px); }
.canvas-col { display: flex; flex-direction: column; min-width: 0; }
.toolbar { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; padding: 8px 12px; border-bottom: 1px solid var(--line); background: var(--panel); }
.seg { display: inline-flex; border: 1px solid var(--line); border-radius: 8px; overflow: hidden; }
.seg button { border: 0; border-radius: 0; padding: 5px 10px; background: transparent; }
.seg button + button { border-left: 1px solid var(--line); }
.seg button.on { background: var(--ink); color: var(--panel); }
.seg.small button { padding: 3px 8px; }
.zoom { margin-left: auto; display: flex; align-items: center; gap: 4px; }
.zoom span { min-width: 52px; text-align: center; color: var(--muted); }

.viewport { position: relative; flex: 1; overflow: hidden; cursor: grab;
  background-color: var(--check-a);
  background-image: linear-gradient(45deg, var(--check-b) 25%, transparent 25%, transparent 75%, var(--check-b) 75%),
                    linear-gradient(45deg, var(--check-b) 25%, transparent 25%, transparent 75%, var(--check-b) 75%);
  background-size: 20px 20px; background-position: 0 0, 10px 10px; }
.viewport.dragging { cursor: grabbing; }
.viewport.tool-select, .viewport.tool-background { cursor: default; }
.viewport.tool-crop { cursor: crosshair; }
.stage { position: absolute; left: 0; top: 0; transform-origin: 0 0; }
.stage img, .stage .vector { position: absolute; inset: 0; width: 100%; height: 100%; user-select: none; }
.stage img.pixelated { image-rendering: pixelated; }
.vector svg { width: 100%; height: 100%; display: block; overflow: visible; }
.view-vectors #raster { visibility: hidden; }
.view-pixels .vector { visibility: hidden; }

.tool-select .shape, .tool-background .shape { cursor: pointer; }
.tool-select .shape:hover { opacity: .75; }
.shape.selected { stroke: var(--sel); stroke-width: 2px; vector-effect: non-scaling-stroke; paint-order: stroke; }
.shape.removed { opacity: 0; pointer-events: none; }
.tool-background .shape.removed { opacity: .18; pointer-events: auto; }
.layer-hidden { display: none; }

.split { position: absolute; top: 0; bottom: 0; width: 0; border-left: 2px solid var(--accent); cursor: ew-resize; }
.split-handle { position: absolute; top: 50%; left: -16px; width: 30px; height: 30px; border-radius: 50%; background: var(--accent); color: #fff; display: grid; place-items: center; transform: translateY(-50%); font-size: 14px; box-shadow: 0 2px 8px rgb(0 0 0 / .25); }
.crop-box { position: absolute; border: 2px dashed var(--accent); background: color-mix(in srgb, var(--accent) 10%, transparent); pointer-events: none; }

.busy { position: absolute; inset: 0; display: flex; gap: 10px; align-items: center; justify-content: center; background: color-mix(in srgb, var(--bg) 55%, transparent); font-weight: 600; }
.spinner { width: 22px; height: 22px; border: 3px solid var(--line); border-top-color: var(--accent); border-radius: 50%; animation: spin .8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
.statusbar { padding: 6px 12px; font-size: 12px; color: var(--muted); border-top: 1px solid var(--line); background: var(--panel); min-height: 28px; }

.panel { background: var(--panel); border-left: 1px solid var(--line); overflow-y: auto; padding: 4px 0 24px; }
.panel details { border-bottom: 1px solid var(--line); padding: 4px 16px 12px; }
.panel summary { font-weight: 600; padding: 8px 0; cursor: pointer; }
.row { display: flex; align-items: center; gap: 8px; margin: 6px 0; flex-wrap: wrap; }
.row.small button { padding: 4px 8px; font-size: 12px; }
.lbl { color: var(--muted); min-width: 64px; }
.radio, .check { display: flex; align-items: center; gap: 6px; margin: 4px 0; }
.slider { display: grid; grid-template-columns: 80px 1fr 40px; align-items: center; gap: 6px; margin: 6px 0; }
.slider output, #maxColorsOut { color: var(--muted); text-align: right; }
#maxColorsRow input { flex: 1; }
.hint { color: var(--muted); font-size: 12px; margin: 6px 0 0; }

.swatches { display: grid; grid-template-columns: repeat(auto-fill, minmax(64px, 1fr)); gap: 6px; margin: 8px 0; }
.swatch { position: relative; border: 2px solid var(--line); border-radius: 8px; padding: 0; overflow: hidden; height: 62px; cursor: pointer; background: var(--panel); }
.swatch.selected { border-color: var(--sel); box-shadow: 0 0 0 2px color-mix(in srgb, var(--sel) 35%, transparent); }
.swatch .chip { position: absolute; inset: 0 0 28px 0; }
.swatch .pct { position: absolute; bottom: 1px; left: 0; right: 0; font-size: 10.5px; line-height: 13px; text-align: center; color: var(--muted); }
.swatch input[type=color] { position: absolute; top: 2px; right: 2px; width: 18px; height: 18px; padding: 0; border: 1px solid rgb(255 255 255 / .8); border-radius: 4px; cursor: pointer; }
.add-color { display: inline-flex; align-items: center; gap: 4px; border: 1px solid var(--line); border-radius: 8px; padding: 2px 6px; font-size: 12px; cursor: pointer; }
.add-color input { width: 22px; height: 18px; padding: 0; border: 0; background: none; }

.layers { list-style: none; padding: 0; margin: 8px 0 0; max-height: 260px; overflow-y: auto; border: 1px solid var(--line); border-radius: 8px; }
.layers li { display: flex; align-items: center; gap: 8px; padding: 5px 8px; border-bottom: 1px solid var(--line); font-size: 13px; }
.layers li:last-child { border-bottom: 0; }
.layers .dot { width: 14px; height: 14px; border-radius: 4px; border: 1px solid var(--line); flex: none; }
.layers .name { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.layers .count { color: var(--muted); font-size: 12px; }
.layers button { padding: 0 6px; font-size: 12px; }
.layers li.off .name { text-decoration: line-through; color: var(--muted); }
.selection { border: 1px solid var(--line); border-radius: 8px; padding: 4px 10px; margin-top: 8px; }
#selDelete { color: var(--danger); }

dialog { border: 1px solid var(--line); border-radius: 14px; padding: 0; background: var(--panel); color: var(--ink); width: min(640px, calc(100vw - 32px)); }
dialog::backdrop { background: rgb(0 0 0 / .35); }
.dl { padding: 20px; }
.dl h2 { margin: 0 0 12px; }
.presets, .formats { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; margin-bottom: 12px; }
.presets button.on { background: var(--ink); color: var(--panel); }
.formats label { border: 1px solid var(--line); border-radius: 8px; padding: 6px 12px; cursor: pointer; }
.grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px 16px; }
.grid label { display: flex; flex-direction: column; gap: 4px; color: var(--muted); font-size: 12px; }
.grid label.check { flex-direction: row; align-items: center; color: var(--ink); font-size: 13px; }
.grid input[type=number], .grid select { color: var(--ink); }
.dl-actions { display: flex; justify-content: flex-end; gap: 8px; margin-top: 16px; }

.toast { position: fixed; bottom: 20px; left: 50%; transform: translateX(-50%); background: var(--ink); color: var(--panel); padding: 10px 16px; border-radius: 10px; max-width: min(560px, calc(100vw - 32px)); box-shadow: 0 6px 20px rgb(0 0 0 / .25); z-index: 10; }
.toast.error { background: var(--danger); color: #fff; }

@media (max-width: 860px) {
  .workspace { grid-template-columns: 1fr; grid-template-rows: 60vh auto; height: auto; }
  .panel { border-left: 0; border-top: 1px solid var(--line); }
  .grid { grid-template-columns: 1fr; }
}

/* a question before the work on the page is lost (a div, not <dialog>: macOS 11's WebKit lacks it) */
.pt-modal { position: fixed; inset: 0; z-index: 20; display: grid; place-items: center; padding: 16px; background: rgb(0 0 0 / .45); }
.pt-modal[hidden] { display: none; }
.pt-modal-box { width: min(420px, 100%); background: var(--panel); color: var(--ink); border: 1px solid var(--line); border-radius: 14px; padding: 20px; box-shadow: 0 16px 48px rgb(0 0 0 / .35); }
.pt-modal-box h2 { margin: 0 0 8px; font-size: 17px; }
.pt-modal-box p { margin: 0 0 18px; color: var(--muted); font-size: 13.5px; line-height: 1.45; }
.pt-modal-actions { display: flex; gap: 8px; justify-content: flex-end; flex-wrap: wrap; }
.pt-modal-actions .danger { background: var(--danger); border-color: var(--danger); color: #fff; font-weight: 600; }