/* Layout: a pro imaging tool, dark by default with a matching light theme. App shell first: slim top bar, compact hero strip, then a three-pane editor
   (file rail | canvas stage | inspector). Graphite panels, an almost-black stage so artwork pops, white "ink"
   for primary actions (DTF's white underbase), cyan as the one signal colour, magenta only on the split handle.
   Light theme swaps the tokens only. */
:root {
  --bg: #0C0D10; --panel: #15171B; --panel-2: #1C1F25; --stage: #08090B; --line: #272B32; --line-2: #1F2228; --line-3: #3A3F48;
  --ink: #ECEEF2; --muted: #8C94A1; --faint: #5E6571;
  --primary: #FFFFFF; --primary-ink: #0C0D10; --primary-glow: rgba(255, 255, 255, .1);
  --signal: #4FD1F5; --signal-soft: rgba(79, 209, 245, .12); --signal-line: rgba(79, 209, 245, .45); --knob-on: #0C0D10;
  --split: #FF4FA3;
  --ok: #3DD68C; --ok-soft: rgba(61, 214, 140, .12); --warn: #F5B841; --warn-soft: rgba(245, 184, 65, .12); --bad: #FF6B6B; --bad-soft: rgba(255, 107, 107, .12);
  --chk-a: #202328; --chk-b: #2A2E35; --sw-chk-a: #30343B; --sw-chk-b: #4A4F58;
  --bar-bg: rgba(12, 13, 16, .86); --glass: rgba(21, 23, 27, .92); --stage-dot: rgba(255, 255, 255, .055); --canvas-edge: rgba(255, 255, 255, .06); --canvas-shadow: rgba(0, 0, 0, .8);
  --switch-off: #2D3139; --knob-off: #8C94A1; --drop-glow: rgba(79, 209, 245, .08);
  --f-display: "Geist", "Inter Tight", system-ui, -apple-system, "Segoe UI", sans-serif;
  --f-body: "Geist", system-ui, -apple-system, "Segoe UI", sans-serif;
  --f-mono: "Geist Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;
  --r: 10px;
  color-scheme: dark;
}
@media (prefers-color-scheme: light) { :root:not([data-theme="dark"]) {
  --bg: #F3F4F6; --panel: #FFFFFF; --panel-2: #F0F2F5; --stage: #E4E7EB; --line: #D9DDE3; --line-2: #E8EBEF; --line-3: #C3C9D1;
  --ink: #111318; --muted: #59616E; --faint: #8A919C;
  --primary: #111318; --primary-ink: #FFFFFF; --primary-glow: rgba(17, 19, 24, .12);
  --signal: #0086AD; --signal-soft: rgba(0, 134, 173, .09); --signal-line: rgba(0, 134, 173, .4); --knob-on: #FFFFFF;
  --split: #E0327F;
  --ok: #12844E; --ok-soft: rgba(18, 132, 78, .1); --warn: #9C6200; --warn-soft: rgba(196, 128, 0, .12); --bad: #CC3333; --bad-soft: rgba(204, 51, 51, .09);
  --chk-a: #E6E9ED; --chk-b: #F6F7F9; --sw-chk-a: #CED3D9; --sw-chk-b: #FFFFFF;
  --bar-bg: rgba(243, 244, 246, .86); --glass: rgba(255, 255, 255, .94); --stage-dot: rgba(17, 19, 24, .07); --canvas-edge: rgba(17, 19, 24, .08); --canvas-shadow: rgba(17, 19, 24, .18);
  --switch-off: #D3D8DF; --knob-off: #FFFFFF; --drop-glow: rgba(0, 134, 173, .07);
  color-scheme: light; } }
:root[data-theme="light"] {
  --bg: #F3F4F6; --panel: #FFFFFF; --panel-2: #F0F2F5; --stage: #E4E7EB; --line: #D9DDE3; --line-2: #E8EBEF; --line-3: #C3C9D1;
  --ink: #111318; --muted: #59616E; --faint: #8A919C;
  --primary: #111318; --primary-ink: #FFFFFF; --primary-glow: rgba(17, 19, 24, .12);
  --signal: #0086AD; --signal-soft: rgba(0, 134, 173, .09); --signal-line: rgba(0, 134, 173, .4); --knob-on: #FFFFFF;
  --split: #E0327F;
  --ok: #12844E; --ok-soft: rgba(18, 132, 78, .1); --warn: #9C6200; --warn-soft: rgba(196, 128, 0, .12); --bad: #CC3333; --bad-soft: rgba(204, 51, 51, .09);
  --chk-a: #E6E9ED; --chk-b: #F6F7F9; --sw-chk-a: #CED3D9; --sw-chk-b: #FFFFFF;
  --bar-bg: rgba(243, 244, 246, .86); --glass: rgba(255, 255, 255, .94); --stage-dot: rgba(17, 19, 24, .07); --canvas-edge: rgba(17, 19, 24, .08); --canvas-shadow: rgba(17, 19, 24, .18);
  --switch-off: #D3D8DF; --knob-off: #FFFFFF; --drop-glow: rgba(0, 134, 173, .07);
  color-scheme: light; }
:root[data-theme="dark"] { color-scheme: dark; }
* { box-sizing: border-box; }
[hidden] { display: none !important; }
body { background: var(--bg); color: var(--ink); font: 14.5px/1.5 var(--f-body); margin: 0; -webkit-font-smoothing: antialiased; }
h1, h2, h3, h4 { margin: 0; text-wrap: balance; }
p { margin: 0; }
button, input, select { font: inherit; color: inherit; }
button { cursor: pointer; }
:focus-visible { outline: 2px solid var(--signal); outline-offset: 2px; }
.mono { font-family: var(--f-mono); font-variant-numeric: tabular-nums; }
::selection { background: var(--signal); color: var(--panel); }

/* top bar */
.bar { position: sticky; top: env(safe-area-inset-top, 0px); z-index: 20; display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; padding-inline: 20px; padding-block: 10px; background: var(--bar-bg); backdrop-filter: blur(10px); border-bottom: 1px solid var(--line-2); }
.brand { display: inline-flex; align-items: center; gap: 9px; color: var(--ink); text-decoration: none; }
.regmark { width: 22px; height: 22px; color: var(--ink); flex: none; }
.word { font: 700 19px/1 var(--f-display); letter-spacing: -0.03em; }
.nav { display: flex; align-items: center; gap: 6px 18px; flex-wrap: wrap; font-size: 13.5px; }
.nav a { color: var(--muted); text-decoration: none; font-weight: 500; }
.nav a:hover { color: var(--ink); }
.chip { color: var(--signal); border: 1px solid var(--signal-line); font: 500 11px/1 var(--f-mono); letter-spacing: .06em; text-transform: uppercase; padding: 5px 8px; border-radius: 999px; }

/* hero strip */
.hero { max-width: 1520px; margin: 0 auto; padding-inline: 20px; padding-block: 28px 22px; display: grid; grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr); gap: 28px; align-items: center; }
@media (max-width: 900px) { .hero { grid-template-columns: minmax(0, 1fr); } }
.eyebrow { font: 500 11.5px/1.2 var(--f-mono); letter-spacing: .1em; text-transform: uppercase; color: var(--signal); margin-bottom: 12px; }
.hero h1 { font: 700 clamp(32px, 4.4vw, 60px)/1 var(--f-display); letter-spacing: -0.045em; max-width: 16ch; }
.hero h1 .dim { color: var(--faint); }
.lede { font-size: clamp(15px, 1.25vw, 17px); color: var(--muted); max-width: 58ch; margin-top: 14px; line-height: 1.55; }
.hero-points { list-style: none; margin: 18px 0 0; padding: 0; display: flex; flex-wrap: wrap; gap: 8px; font-size: 13px; color: var(--muted); }
.hero-points li { border: 1px solid var(--line); border-radius: 999px; padding: 5px 11px; background: var(--panel); }
.hero-points b { color: var(--ink); font-weight: 600; margin-right: 4px; }

.drop { position: relative; display: flex; flex-direction: column; justify-content: center; align-items: center; text-align: center; gap: 5px; min-height: 200px; padding: 24px; border-radius: 14px; cursor: pointer;
  background: radial-gradient(120% 90% at 50% 0%, var(--drop-glow), transparent 60%), var(--panel);
  border: 1px dashed var(--line-3); transition: border-color .15s, box-shadow .15s, background .15s; }
.drop:hover, .drop.over { border-color: var(--signal); box-shadow: 0 0 0 4px var(--signal-soft), 0 0 40px -8px var(--signal-line); }
.drop.over { background: radial-gradient(120% 90% at 50% 0%, var(--signal-soft), transparent 60%), var(--panel-2); }
.drop input { position: absolute; width: 1px; height: 1px; opacity: 0; pointer-events: none; }
.drop:focus-within { outline: 2px solid var(--signal); outline-offset: 3px; }
.drop-title { font: 650 clamp(20px, 2vw, 24px)/1.1 var(--f-display); letter-spacing: -0.03em; }
.drop-sub { color: var(--muted); font-size: 13.5px; }
.drop-fmt { font: 500 11px/1 var(--f-mono); letter-spacing: .08em; color: var(--faint); margin-top: 8px; }
.drop-btn { margin-top: 12px; pointer-events: none; }
.reg { position: absolute; width: 16px; height: 16px; color: var(--faint); border-radius: 50%; box-shadow: inset 0 0 0 1.25px currentColor; }
.reg::before, .reg::after { content: ""; position: absolute; background: currentColor; }
.reg::before { left: 50%; top: -4px; bottom: -4px; width: 1.25px; transform: translateX(-50%); }
.reg::after { top: 50%; left: -4px; right: -4px; height: 1.25px; transform: translateY(-50%); }
.reg.tl { top: 14px; left: 14px; } .reg.tr { top: 14px; right: 14px; } .reg.bl { bottom: 14px; left: 14px; } .reg.br { bottom: 14px; right: 14px; }

/* editor */
.ws { max-width: 1520px; margin: 0 auto; padding-inline: 20px; padding-block: 0 44px; display: grid; grid-template-columns: 236px minmax(0, 1fr) 372px; gap: 12px; align-items: start; container-type: inline-size; }
@media (max-width: 1180px) { .ws { grid-template-columns: minmax(0, 1fr) 352px; } .files { grid-column: 1 / -1; } }
@media (max-width: 860px) { .ws { grid-template-columns: minmax(0, 1fr); } }
.card { background: var(--panel); border: 1px solid var(--line); border-radius: var(--r); min-width: 0; }
.label { font: 500 11px/1 var(--f-mono); letter-spacing: .1em; text-transform: uppercase; color: var(--muted); }
.link { background: none; border: 0; padding: 2px 0; color: var(--muted); font-size: 12.5px; font-weight: 500; text-decoration: underline; text-underline-offset: 3px; }
.link:hover { color: var(--ink); }

.files { display: flex; flex-direction: column; }
.files-head { display: flex; justify-content: space-between; align-items: center; padding: 12px 14px; border-bottom: 1px solid var(--line-2); }
.flist { list-style: none; margin: 0; padding: 6px; display: flex; flex-direction: column; gap: 2px; max-height: 560px; overflow: auto; }
@media (max-width: 1180px) { .flist { flex-direction: row; overflow-x: auto; max-height: none; } .fitem { min-width: 220px; } }
.fitem { display: grid; grid-template-columns: 40px minmax(0, 1fr) auto; gap: 10px; align-items: center; padding: 7px 8px; border-radius: 8px; cursor: pointer; position: relative; }
.fitem:hover { background: var(--panel-2); }
.fitem[aria-current="true"] { background: var(--panel-2); box-shadow: inset 2px 0 0 var(--signal); }
.fthumb { width: 40px; height: 40px; border-radius: 6px; background: repeating-conic-gradient(var(--chk-a) 0 25%, var(--chk-b) 0 50%) 0 0 / 8px 8px; display: grid; place-items: center; overflow: hidden; border: 1px solid var(--line-2); }
.fthumb img { max-width: 100%; max-height: 100%; }
.fname { font-size: 13px; font-weight: 550; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.fsub { font-size: 11.5px; color: var(--muted); display: flex; gap: 6px; align-items: center; }
.dot { width: 7px; height: 7px; border-radius: 50%; background: var(--faint); flex: none; }
.dot.ok { background: var(--ok); } .dot.warn { background: var(--warn); } .dot.bad { background: var(--bad); } .dot.busy { background: var(--signal); animation: pulse 1.2s ease-in-out infinite; }
@keyframes pulse { 50% { opacity: .35; } }
.fx { border: 0; background: none; color: var(--faint); width: 24px; height: 24px; border-radius: 6px; font-size: 16px; line-height: 1; }
.fx:hover { background: var(--line); color: var(--ink); }
.files-foot { display: flex; gap: 8px; padding: 10px; border-top: 1px solid var(--line-2); flex-wrap: wrap; }
.files-foot .btn { flex: 1 1 auto; }

.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; background: var(--primary); color: var(--primary-ink); border: 1px solid var(--primary); border-radius: 8px; padding: 9px 15px; font-weight: 600; font-size: 13.5px; white-space: nowrap; text-decoration: none; transition: background .12s, box-shadow .12s; }
.btn:hover { box-shadow: 0 0 0 4px var(--primary-glow); }
.btn.accent { background: var(--primary); color: var(--primary-ink); }
.btn.ghost { background: transparent; color: var(--ink); border-color: var(--line); }
.btn.ghost:hover { border-color: var(--line-3); box-shadow: none; background: var(--panel-2); }
.btn.sm { padding: 6px 11px; font-size: 12.5px; }
.btn:disabled { opacity: .35; cursor: default; box-shadow: none; }

/* stage */
.stage { display: flex; flex-direction: column; overflow: hidden; }
.stage-bar { display: flex; align-items: center; gap: 10px 12px; flex-wrap: wrap; padding: 8px 10px; border-bottom: 1px solid var(--line-2); }
.seg { display: inline-flex; border: 1px solid var(--line); border-radius: 8px; overflow: hidden; background: var(--bg); padding: 2px; gap: 2px; }
.seg button { border: 0; background: transparent; padding: 5px 11px; font-size: 12.5px; font-weight: 500; color: var(--muted); border-radius: 6px; }
.seg button:hover { color: var(--ink); }
.seg button[aria-pressed="true"] { background: var(--panel-2); color: var(--ink); box-shadow: inset 0 0 0 1px var(--line); }
.seg.sm button { padding: 4px 9px; font-size: 12px; }
.swatches { display: flex; gap: 6px; align-items: center; padding-left: 4px; }
.sw { width: 20px; height: 20px; border-radius: 50%; border: 1px solid var(--line-3); padding: 0; }
.sw[aria-pressed="true"] { outline: 2px solid var(--signal); outline-offset: 2px; }
.sw.check { background: repeating-conic-gradient(var(--sw-chk-a) 0 25%, var(--sw-chk-b) 0 50%) 0 0 / 7px 7px; }
.toggle-btn { border: 1px solid var(--line); background: var(--bg); border-radius: 8px; padding: 5px 11px; font-size: 12.5px; font-weight: 500; color: var(--muted); }
.toggle-btn:hover { color: var(--ink); }
.toggle-btn[aria-pressed="true"] { background: var(--primary); color: var(--primary-ink); border-color: var(--primary); }
#zoom { margin-left: auto; }
.viewport { position: relative; height: clamp(340px, 64vh, 720px); overflow: auto; background-color: var(--stage); background-image: radial-gradient(var(--stage-dot) 1px, transparent 1px); background-size: 18px 18px; display: grid; place-items: center; }
.viewport.zoomed { display: block; }
.viewport canvas { display: block; box-shadow: 0 0 0 1px var(--canvas-edge), 0 20px 60px -20px var(--canvas-shadow); }
.viewport.picking canvas { cursor: crosshair; }
.split-handle { position: absolute; top: 0; bottom: 0; width: 28px; margin-left: -14px; cursor: ew-resize; display: flex; justify-content: center; touch-action: none; }
.split-handle::before { content: ""; width: 1.5px; height: 100%; background: var(--split); box-shadow: 0 0 10px rgba(255, 79, 163, .6); }
.split-handle span { position: absolute; top: 50%; transform: translateY(-50%); width: 26px; height: 26px; border-radius: 50%; background: var(--split); box-shadow: 0 2px 12px rgba(0, 0, 0, .5); }
.split-handle span::before { content: "‹ ›"; color: #fff; font: 700 12px/26px var(--f-mono); display: block; text-align: center; letter-spacing: -1px; }
.pickhint { position: absolute; top: 12px; left: 50%; transform: translateX(-50%); background: var(--primary); color: var(--primary-ink); padding: 6px 12px; border-radius: 999px; font-size: 12.5px; font-weight: 600; }
.busy { position: absolute; left: 12px; bottom: 12px; display: flex; align-items: center; gap: 10px; background: var(--glass); border: 1px solid var(--line); padding: 8px 12px; border-radius: 10px; font-size: 12.5px; backdrop-filter: blur(6px); }
.bar-track { width: 90px; height: 3px; background: var(--line); border-radius: 3px; overflow: hidden; }
.bar-fill { display: block; height: 100%; width: 0; background: var(--signal); transition: width .15s; }
.spin { width: 13px; height: 13px; border-radius: 50%; border: 2px solid var(--line); border-top-color: var(--signal); animation: sp .8s linear infinite; }
@keyframes sp { to { transform: rotate(360deg); } }
.empty-stage { position: absolute; inset: 0; display: grid; place-items: center; color: var(--muted); }
.stats { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); margin: 0; border-top: 1px solid var(--line-2); background: var(--panel); }
@container (max-width: 640px) { .stats { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
.stats div { padding: 9px 14px; border-right: 1px solid var(--line-2); min-width: 0; }
.stats div:last-child { border-right: 0; }
.stats dt { font: 500 10px/1.2 var(--f-mono); letter-spacing: .1em; text-transform: uppercase; color: var(--faint); }
.stats dd { margin: 3px 0 0; font: 500 14px/1.3 var(--f-mono); font-variant-numeric: tabular-nums; overflow-wrap: anywhere; }
.stats .arrow { color: var(--faint); font-weight: 400; }
.stats .good { color: var(--ok); } .stats .poor { color: var(--bad); } .stats .meh { color: var(--warn); }

/* inspector */
.panel { display: flex; flex-direction: column; gap: 12px; min-width: 0; }
.pcard { background: var(--panel); border: 1px solid var(--line); border-radius: var(--r); padding: 14px; min-width: 0; }
.pcard h3 { font: 500 11px/1 var(--f-mono); letter-spacing: .1em; text-transform: uppercase; color: var(--muted); }
.phead { display: flex; justify-content: space-between; align-items: center; gap: 10px; margin-bottom: 12px; flex-wrap: wrap; }
.size-row { display: flex; align-items: flex-end; gap: 8px; flex-wrap: wrap; margin-top: 10px; }
.size-row label { display: flex; flex-direction: column; gap: 4px; font-size: 11.5px; color: var(--faint); flex: 1 1 90px; min-width: 0; }
.inp { display: flex; align-items: center; border: 1px solid var(--line); border-radius: 7px; background: var(--bg); padding-right: 9px; }
.inp:focus-within { border-color: var(--signal-line); }
.inp input { border: 0; background: transparent; padding: 7px 9px; width: 100%; min-width: 0; font: 500 13.5px var(--f-mono); outline: none; }
.inp span { font: 500 11.5px var(--f-mono); color: var(--faint); }
.chips { display: flex; gap: 6px; flex-wrap: wrap; }
.pchip { border: 1px solid var(--line); background: var(--bg); border-radius: 7px; padding: 4px 9px; font-size: 12px; color: var(--muted); }
.pchip:hover { color: var(--ink); }
.pchip b { font: 500 11px var(--f-mono); color: var(--faint); margin-left: 3px; }
.pchip[aria-pressed="true"] { background: var(--panel-2); border-color: var(--signal-line); color: var(--ink); }
.pchip[aria-pressed="true"] b { color: var(--signal); }

.score { display: flex; align-items: center; gap: 14px; }
.score-num { font: 600 40px/1 var(--f-mono); letter-spacing: -0.04em; }
.score-txt { font-size: 12.5px; color: var(--muted); line-height: 1.5; }
.verdict { display: inline-flex; align-items: center; gap: 6px; padding: 3px 9px; border-radius: 999px; font: 500 11.5px/1.4 var(--f-mono); letter-spacing: .02em; }
.v-ok { background: var(--ok-soft); color: var(--ok); } .v-warn { background: var(--warn-soft); color: var(--warn); } .v-bad { background: var(--bad-soft); color: var(--bad); }
.issues { list-style: none; margin: 12px 0 0; padding: 0; display: flex; flex-direction: column; }
.issue { display: grid; grid-template-columns: 18px minmax(0, 1fr) auto; gap: 10px; padding: 9px 0; border-top: 1px solid var(--line-2); align-items: start; }
.issue:first-child { border-top: 0; }
.sev { width: 18px; height: 18px; border-radius: 50%; display: grid; place-items: center; font: 600 10.5px/1 var(--f-mono); margin-top: 1px; }
.sev.bad { background: var(--bad-soft); color: var(--bad); } .sev.warn { background: var(--warn-soft); color: var(--warn); } .sev.info { background: var(--signal-soft); color: var(--signal); } .sev.ok { background: var(--ok-soft); color: var(--ok); }
.issue h4 { font-size: 13px; font-weight: 600; line-height: 1.35; }
.issue p { font-size: 12px; color: var(--muted); margin-top: 2px; line-height: 1.45; }
.tag { font: 500 10px/1 var(--f-mono); letter-spacing: .06em; text-transform: uppercase; padding: 4px 6px; border-radius: 4px; white-space: nowrap; margin-top: 2px; }
.tag.fixed { background: var(--ok-soft); color: var(--ok); } .tag.open { color: var(--faint); border: 1px solid var(--line); }
.passed { margin-top: 6px; border-top: 1px solid var(--line-2); padding-top: 9px; }
.passed summary { cursor: pointer; font-size: 12.5px; color: var(--muted); font-weight: 500; list-style: none; }
.passed summary::-webkit-details-marker { display: none; }
.passed summary::before { content: "✓ "; color: var(--ok); }

.fixlist { display: flex; flex-direction: column; }
.fix { border-top: 1px solid var(--line-2); padding: 10px 0; }
.fix:first-child { border-top: 0; padding-top: 0; }
.fix-row { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 12px; align-items: center; }
.fix-row h4 { font-size: 13.5px; font-weight: 600; display: flex; align-items: center; gap: 6px; flex-wrap: wrap; }
.fix-row p { font-size: 12px; color: var(--muted); margin-top: 2px; line-height: 1.45; }
.rec { font: 500 9.5px/1 var(--f-mono); letter-spacing: .06em; text-transform: uppercase; color: var(--signal); border: 1px solid var(--signal-line); padding: 3px 5px; border-radius: 4px; }
.ai { font: 600 9.5px/1 var(--f-mono); letter-spacing: .06em; color: #0C0D10; background: linear-gradient(90deg, #4FD1F5, #B48CFF); padding: 3px 5px; border-radius: 4px; }
.switch { position: relative; width: 34px; height: 20px; border-radius: 999px; background: var(--switch-off); border: 0; padding: 0; flex: none; transition: background .15s; }
.switch::after { content: ""; position: absolute; top: 3px; left: 3px; width: 14px; height: 14px; border-radius: 50%; background: var(--knob-off); box-shadow: 0 1px 2px rgba(0, 0, 0, .25); transition: transform .15s, background .15s; }
.switch[aria-checked="true"] { background: var(--signal); }
.switch[aria-checked="true"]::after { transform: translateX(14px); background: var(--knob-on); }
.fix-opts { margin-top: 10px; padding: 11px; background: var(--bg); border: 1px solid var(--line-2); border-radius: 8px; display: flex; flex-direction: column; gap: 11px; }
.opt { display: flex; flex-direction: column; gap: 6px; font-size: 12px; }
.opt-row { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.opt label, .opt .lbl { display: flex; justify-content: space-between; color: var(--muted); font-weight: 500; }
.opt output { font: 500 11.5px var(--f-mono); color: var(--ink); }
.opt input[type=range] { width: 100%; accent-color: var(--signal); }
.opt .seg button { padding: 4px 10px; font-size: 12px; }
.swatch-pill { display: inline-flex; align-items: center; gap: 6px; border: 1px solid var(--line); background: var(--panel); border-radius: 999px; padding: 3px 9px 3px 4px; font: 500 11.5px var(--f-mono); }
.swatch-pill i { width: 15px; height: 15px; border-radius: 50%; border: 1px solid var(--line-3); display: block; }
.swatch-pill button { border: 0; background: none; color: var(--faint); padding: 0 0 0 2px; font-size: 14px; line-height: 1; }
.check { display: flex; align-items: center; gap: 8px; color: var(--ink); font-size: 12px; cursor: pointer; }
.check input { accent-color: var(--signal); width: 14px; height: 14px; margin: 0; }
.note { font-size: 11.5px; color: var(--muted); line-height: 1.45; }

.export { display: flex; flex-direction: column; gap: 10px; }
.export .btn { width: 100%; }
.export .btn.accent { padding: 11px 15px; font-size: 14px; }
.export-row { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 10px; align-items: end; }

/* lower page */
.how { max-width: 1520px; margin: 0 auto; padding-inline: 20px; padding-block: 40px 8px; }
.how h2 { font: 700 clamp(24px, 2.8vw, 36px)/1.05 var(--f-display); letter-spacing: -0.04em; margin-bottom: 18px; }
.steps { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; counter-reset: s; }
@media (max-width: 760px) { .steps { grid-template-columns: minmax(0, 1fr); } }
.steps li { counter-increment: s; background: var(--panel); border: 1px solid var(--line); border-radius: var(--r); padding: 18px; display: flex; flex-direction: column; gap: 6px; }
.steps li::before { content: "0" counter(s); font: 500 11.5px/1 var(--f-mono); color: var(--signal); letter-spacing: .08em; }
.steps b { font: 650 17px/1.25 var(--f-display); letter-spacing: -0.02em; }
.steps span, .fixgrid span { color: var(--muted); font-size: 13.5px; }
.fixgrid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: var(--r); overflow: hidden; }
@media (max-width: 1000px) { .fixgrid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 520px) { .fixgrid { grid-template-columns: minmax(0, 1fr); } }
.fixgrid div { background: var(--panel); padding: 16px; display: flex; flex-direction: column; gap: 5px; }
.fixgrid b { font-size: 14.5px; font-weight: 600; }
.foot { max-width: 1520px; margin: 0 auto; padding-inline: 20px; padding-block: 34px 40px; display: flex; justify-content: space-between; gap: 10px; flex-wrap: wrap; color: var(--faint); font-size: 12.5px; }
.toast { position: fixed; left: 50%; bottom: calc(18px + env(safe-area-inset-bottom, 0px)); transform: translateX(-50%) translateY(10px); background: var(--primary); color: var(--primary-ink); padding: 10px 16px; border-radius: 10px; font-size: 13.5px; font-weight: 550; opacity: 0; pointer-events: none; transition: opacity .2s, transform .2s; max-width: calc(100% - 32px); }
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }
@media (prefers-reduced-motion: reduce) { *, *::before, *::after { transition: none !important; animation: none !important; } }
@media (min-width: 1181px) { .files, .stage { position: sticky; top: calc(64px + env(safe-area-inset-top, 0px)); } }
@media (min-width: 861px) and (max-width: 1180px) { .stage { position: sticky; top: calc(64px + env(safe-area-inset-top, 0px)); } }

.theme-switch button { display: inline-flex; align-items: center; gap: 6px; padding: 5px 10px; font-size: 12.5px; }
.theme-switch svg { width: 14px; height: 14px; flex: none; }