/* apoptotic-lab interface.
   Monochrome chrome in the manner of a developer console: Geist and Geist Mono (served from
   /static/fonts, no external requests), hairline borders, no shadows or gradients, 6 to 12 px
   corners. Colour appears only in the images and plots. Structure: a header with the breadcrumb,
   the workflow as tabs under it, and each step as a page (title, description, cards, and a footer
   that stays at the bottom of the window). The image viewer and the full-screen tools (inspector,
   display, mask editor) keep a dark stage so the image is the brightest thing on screen. */

@font-face {
  font-family: "Geist"; src: url("fonts/Geist-Variable.woff2") format("woff2");
  font-weight: 100 900; font-style: normal; font-display: swap;
}
@font-face {
  font-family: "Geist Mono"; src: url("fonts/GeistMono-Variable.woff2") format("woff2");
  font-weight: 100 900; font-style: normal; font-display: swap;
}

/* ================================================================ tokens */
:root {
  color-scheme: light;
  --page:        #FAFAFA;
  --card:        #FFFFFF;
  --subtle:      #F5F5F5;
  --hover:       #F0F0F0;
  --border:      #EAEAEA;
  --border-2:    #D9D9D9;
  --border-3:    #A8A8A8;
  --fg:          #171717;
  --fg-2:        #4D4D4D;
  --fg-3:        #8F8F8F;
  --inv-bg:      #171717;
  --inv-fg:      #FFFFFF;
  --inv-hover:   #383838;
  --ring:        rgba(0, 0, 0, .10);
  --stage:       #000000;
  --code-fg:     #171717;
  --code-bg:     #F2F2F2;

  --font: "Geist", -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, sans-serif;
  --mono: "Geist Mono", ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, monospace;

  --r-sm: 6px;
  --r: 8px;
  --r-lg: 12px;
  --head: 56px;
  --tabs: 46px;
  --maxw: 1520px;
  --gutter: 32px;
  --top: calc(var(--head) + var(--tabs));
  --sticky: calc(var(--top) + 24px);
}
:root[data-theme="dark"], .surface {
  color-scheme: dark;
  --page:        #000000;
  --card:        #0A0A0A;
  --subtle:      #111111;
  --hover:       #1A1A1A;
  --border:      #242424;
  --border-2:    #333333;
  --border-3:    #5C5C5C;
  --fg:          #EDEDED;
  --fg-2:        #A1A1A1;
  --fg-3:        #737373;
  --inv-bg:      #EDEDED;
  --inv-fg:      #0A0A0A;
  --inv-hover:   #CCCCCC;
  --ring:        rgba(255, 255, 255, .14);
  --code-fg:     #EDEDED;
  --code-bg:     #1A1A1A;
}

/* ================================================================ base */
* { box-sizing: border-box; }
html { font-variant-ligatures: none; font-feature-settings: "calt" 0, "liga" 0; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; text-rendering: optimizeLegibility; }
body {
  margin: 0; background: var(--page); color: var(--fg);
  font-family: var(--font); font-size: 14px; line-height: 1.5;
  font-variant-numeric: tabular-nums;
}
.hidden, .step-off { display: none !important; }
::selection { background: var(--fg); color: var(--page); }
:focus-visible { outline: none; box-shadow: 0 0 0 2px var(--page), 0 0 0 4px var(--fg-3); border-radius: var(--r-sm); }

h1, h2, h3 { margin: 0; font-family: var(--font); color: var(--fg); }
h1 { font-size: clamp(32px, 3.4vw, 44px); line-height: 1.08; font-weight: 600; letter-spacing: -.045em; }
h2 { font-size: 28px; line-height: 1.15; font-weight: 600; letter-spacing: -.035em; }
h3, .kicker { font-size: 14px; line-height: 1.4; font-weight: 600; letter-spacing: -.01em; margin: 0 0 12px; }
p { margin: 0 0 10px; }
a { color: inherit; text-decoration: underline; text-decoration-color: var(--border-3); text-underline-offset: 3px; }
a:hover { text-decoration-color: var(--fg); }
b { font-weight: 600; }
/* Inline code stays on one line (file names should not break at a hyphen) and has no ligatures:
   Geist Mono would otherwise draw ">-" in "Foto<n>-marker" as an arrow. */
code {
  font-family: var(--mono); font-size: .9em; color: var(--code-fg); white-space: nowrap;
  background: var(--code-bg); border: 1px solid var(--border); border-radius: 4px; padding: 0 4px;
}
.meta { font-family: var(--mono); font-size: 12px; color: var(--fg-3); letter-spacing: 0; }
.note { color: var(--fg-2); font-size: 13px; margin: 6px 0; }
.lead { color: var(--fg-2); font-size: 17px; line-height: 1.55; max-width: 64ch; }
.ellip { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.nocase { text-transform: none; letter-spacing: 0; }
.spacer { flex: 1; }

/* ================================================================ header */
#topbar {
  position: fixed; top: 0; left: 0; right: 0; height: var(--head); z-index: 12;
  display: flex; align-items: center; gap: 12px; padding: 0 24px;
  background: var(--card); border-bottom: 1px solid var(--border);
}
/* Logo: the designer's "apoptotic-lab" lettering (Monument Grotesk Regular) as one alpha sprite
   in brand/apoptotic-lab.png, 1380 x 218 source units. Each glyph is a slice of that sprite used as
   a mask, so it takes the text colour in both themes. At rest only "a" and "-lab" show. On hover
   it types like a terminal: a caret appears after "a" and "poptotic" is typed in one letter per
   step, pushing "-lab" right; the caret goes once the word is done. On leave the
   letters are deleted in reverse, like backspacing. Only on the start page (#main.no-steps); on
   the workflow pages the logo stays a static a-lab. */
.logo {
  --lh: 24px; --u: calc(var(--lh) / 218);
  --step: 65ms; --lead: 90ms;
  position: relative; display: inline-flex; flex: none; height: var(--lh); color: var(--fg); cursor: pointer;
  border-radius: 4px; outline-offset: 4px;
}
.logo .g {
  display: block; flex: none; height: 100%; width: calc(var(--w) * var(--u));
  background: currentColor;
  -webkit-mask-image: url("brand/apoptotic-lab.png?v=2"); mask-image: url("brand/apoptotic-lab.png?v=2");
  -webkit-mask-repeat: no-repeat; mask-repeat: no-repeat;
  -webkit-mask-size: calc(1380 * var(--u)) 100%; mask-size: calc(1380 * var(--u)) 100%;
  -webkit-mask-position: calc(var(--x) * var(--u) * -1) 0; mask-position: calc(var(--x) * var(--u) * -1) 0;
}
.logo .x {
  width: 0;
  transition: width 0s linear calc(var(--j) * 28ms);
}
body:has(#main.no-steps) .logo:hover .x {
  width: calc(var(--w) * var(--u));
  transition-delay: calc(var(--lead) + var(--i) * var(--step));
}
/* Caret: a terminal block cursor. A zero-width anchor in the flow, so typed letters push it right;
   the block is drawn by ::after, one character cell wide and the full line tall. White with
   mix-blend-mode: difference inverts what is under it, so the character it covers shows in the
   negative colour in both themes. It sits on the "-" while typing and goes once the word is done.
   Visibility rather than opacity toggles it: an opacity animation would isolate the blend. */
.logo .caret { position: relative; flex: none; width: 0; visibility: hidden; }
.logo .caret::after {
  content: ""; position: absolute; left: calc(var(--off, 0) * var(--u)); top: calc(4 * var(--u));
  width: calc(90 * var(--u)); height: calc(210 * var(--u));
  background: #FFFFFF; mix-blend-mode: difference;
}
body:has(#main.no-steps) .logo:hover .c1 { animation: logo-caret-type calc(var(--lead) + 8 * var(--step)) steps(1) forwards; }
@keyframes logo-caret-type { 0% { visibility: visible; } 100% { visibility: hidden; } }
.crumb-sep { color: var(--border-3); font-size: 18px; font-weight: 300; margin: 0 2px; }
.crumb { font-size: 14px; color: var(--fg-2); white-space: nowrap; }
#topbar:has(.crumb:empty) .crumb-sep { display: none; }
.status {
  display: inline-flex; align-items: center; gap: 8px; height: 32px; padding: 0 10px;
  font-family: var(--mono); font-size: 12px; color: var(--fg-2);
  border: 1px solid var(--border); border-radius: var(--r-sm); white-space: nowrap;
}
.status::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--fg); flex: none; }
.status.cpu::before { background: transparent; box-shadow: inset 0 0 0 1.5px var(--fg-2); }
#outdir-pick { gap: 8px; }
#outdir-pick svg { width: 15px; height: 15px; flex: none; }
#outdir-name { font-family: var(--mono); font-size: 12px; color: var(--fg-2); max-width: 160px; }
#outdir-name:not(:empty)::before { content: ""; display: inline-block; width: 1px; height: 12px; background: var(--border-2); margin: 0 8px -1px 0; }
.icon-btn, .icon-btn.sm { width: 32px; height: 32px; padding: 0; justify-content: center; }
.icon-btn svg { width: 16px; height: 16px; flex: none; }
#theme-toggle .moon { display: none; }
:root[data-theme="dark"] #theme-toggle .sun { display: none; }
:root[data-theme="dark"] #theme-toggle .moon { display: block; }
@media (max-width: 1100px) { #outdir-name, .crumb, .crumb-sep { display: none; } }

/* ================================================================ workflow tabs */
#steps {
  position: fixed; top: var(--head); left: 0; right: 0; height: var(--tabs); z-index: 11;
  background: var(--card); border-bottom: 1px solid var(--border);
}
#steps ol { display: flex; align-items: stretch; gap: 4px; height: 100%; margin: 0; padding: 0 16px; list-style: none; overflow-x: auto; }
#steps li { display: flex; }
.step {
  position: relative; z-index: 0; display: inline-flex; align-items: center; gap: 9px; height: 100%;
  padding: 0 10px; background: none; border: 0; border-radius: 0;
  font-size: 14px; font-weight: 400; color: var(--fg-3); white-space: nowrap; cursor: default;
}
.step::before { /* hover plate, as in console tabs */
  content: ""; position: absolute; left: 2px; right: 2px; top: 8px; bottom: 8px;
  border-radius: var(--r-sm); background: transparent; z-index: -1; transition: background .12s linear;
}
.step .n {
  display: inline-flex; align-items: center; justify-content: center; width: 20px; height: 20px; flex: none;
  border: 1px solid var(--border-2); border-radius: 50%; font-family: var(--mono); font-size: 11px; color: var(--fg-3);
}
.step .n svg { width: 11px; height: 11px; }
.step.is-done { color: var(--fg-2); cursor: pointer; }
.step.is-done .n { border-color: var(--fg-3); color: var(--fg); }
.step.is-done:hover { color: var(--fg); background: none; }
.step.is-done:hover::before { background: var(--hover); }
.step.is-active { color: var(--fg); font-weight: 500; }
.step.is-active .n { background: var(--fg); border-color: var(--fg); color: var(--card); }
.step.is-active::after { content: ""; position: absolute; left: 10px; right: 10px; bottom: -1px; height: 2px; background: var(--fg); border-radius: 2px 2px 0 0; }
.step.is-open { color: var(--fg-2); cursor: pointer; }
.step.is-open:hover { color: var(--fg); background: none; }
.step.is-open:hover::before { background: var(--hover); }
.step.is-todo { opacity: .55; }
.step:hover { background: none; border: 0; }

/* ================================================================ layout */
main { max-width: var(--maxw); margin: 0 auto; padding: calc(var(--top) + 36px) var(--gutter) 40px; }
main.no-steps { padding-top: calc(var(--head) + 64px); }
.panel { width: 100%; }

/* page header: title, one-line description, and context on the right */
.panel-head { display: flex; align-items: flex-end; gap: 16px 24px; flex-wrap: wrap; margin: 0 0 28px; }
.panel-head .ph-text { min-width: 0; flex: 1 1 420px; }
.panel-head h2 { margin: 0; }
.panel-head .desc { margin: 8px 0 0; color: var(--fg-2); font-size: 15px; max-width: 80ch; }
.panel-head > .meta { margin-left: auto; padding-bottom: 3px; font-size: 13px; }
.panel-head .ctx-slot { display: flex; align-items: center; gap: 10px; margin-left: auto; padding: 6px 12px 6px 6px;
  border: 1px solid var(--border); border-radius: var(--r); background: var(--card); }
.panel-head .ctx-slot:empty { display: none; }
.panel-head .ctx-slot img { width: 48px; height: 32px; object-fit: cover; background: var(--stage); border-radius: 4px; cursor: zoom-in; display: block; }
.panel-head .ctx-slot .name { font-family: var(--mono); font-size: 12.5px; color: var(--fg); }
.panel-head .ctx-slot .meta { margin: 0; }
.panel-head .ctx-slot + .meta { margin-left: 0; }

/* cards */
.card, .block, .upload-help, #segresults:not(:empty), #measure-out:not(:empty), #measure-out-batch:not(:empty), #btable:not(:empty), .plot-wrap {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--r-lg); margin: 0 0 16px;
}
.block, .upload-help, #segresults:not(:empty), #measure-out:not(:empty), #measure-out-batch:not(:empty), .plot-wrap { padding: 20px 22px; }
#measure-out-batch:empty, #segresults:empty { display: none; }
.block .block { background: none; border: 0; padding: 0; margin: 0; }
.block > h3 { margin-bottom: 14px; }
.card-head { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; padding: 14px 18px; border-bottom: 1px solid var(--border); }
.card-head h3 { margin: 0; }
.card-body { padding: 18px; }
.card-foot {
  display: flex; align-items: center; gap: 10px; flex-wrap: wrap; justify-content: flex-end;
  margin: 18px -22px -20px; padding: 12px 22px; background: var(--subtle);
  border-top: 1px solid var(--border); border-radius: 0 0 var(--r-lg) var(--r-lg);
}
.card-foot .note, .card-foot .meta, .card-foot .loading { margin: 0 auto 0 0; }
.meas-grid > .card-foot { grid-column: 1 / -1; margin-top: 4px; }
.span { grid-column: 1 / -1; }
.tbar-title { margin: 0; }
.pos-fig { margin-top: 16px; }
.pos-fig img { max-width: min(100%, 980px); }
.sect { padding-top: 16px; margin-top: 16px; border-top: 1px solid var(--border); }
.sect:first-child { padding-top: 0; margin-top: 0; border-top: 0; }
.sect-title { display: flex; align-items: center; font-size: 13px; font-weight: 500; color: var(--fg); margin: 0 0 10px; }

/* footer of every step: stays at the bottom of the window */
.foot {
  position: sticky; bottom: 0; z-index: 5; display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
  margin-top: 24px; padding: 14px 0 18px; background: var(--page); border-top: 1px solid var(--border);
}
.foot .back { margin-right: auto; }
.foot .primary { margin-left: auto; }
.foot .back + .primary { margin-left: 0; }
.actionrow { display: flex; align-items: center; gap: 8px; margin: 12px 0 0; flex-wrap: wrap; }

/* ================================================================ controls */
button, .btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  height: 36px; padding: 0 14px; font-family: var(--font); font-size: 14px; font-weight: 500; line-height: 1;
  color: var(--fg); background: var(--card); border: 1px solid var(--border-2); border-radius: var(--r-sm);
  cursor: pointer; white-space: nowrap; text-decoration: none;
  transition: background .12s linear, border-color .12s linear, color .12s linear;
}
button:hover, .btn:hover { background: var(--hover); border-color: var(--border-3); color: var(--fg); }
button:disabled, .btn:disabled { cursor: not-allowed; color: var(--fg-3); background: var(--subtle); border-color: var(--border); }
.primary { background: var(--inv-bg); color: var(--inv-fg); border-color: var(--inv-bg); }
.primary:hover { background: var(--inv-hover); border-color: var(--inv-hover); color: var(--inv-fg); }
.primary:disabled, .primary:disabled:hover { background: var(--subtle); color: var(--fg-3); border-color: var(--border); }
.sm { height: 32px; padding: 0 12px; font-size: 13px; }
.xs { height: 26px; padding: 0 8px; font-size: 12px; }
.quiet { background: none; border-color: transparent; color: var(--fg-2); }
.quiet:hover { background: var(--hover); border-color: transparent; color: var(--fg); }
.linkish { height: auto; padding: 0; background: none; border: 0; color: var(--fg-2); font-weight: 400; text-decoration: underline; text-underline-offset: 3px; }
.linkish:hover { background: none; color: var(--fg); }
button.rm { width: 28px; height: 28px; padding: 0; color: var(--fg-3); background: none; border-color: transparent; font-size: 16px; }
button.rm:hover { color: var(--fg); background: var(--hover); border-color: var(--border); }

input, select, textarea {
  height: 36px; font-family: var(--font); font-size: 14px; color: var(--fg); background: var(--card);
  border: 1px solid var(--border-2); border-radius: var(--r-sm); padding: 0 10px;
  transition: border-color .12s linear, box-shadow .12s linear;
}
textarea { height: auto; padding: 8px 10px; }
input::placeholder { color: var(--fg-3); }
input:hover, select:hover { border-color: var(--border-3); }
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--fg-3); box-shadow: 0 0 0 3px var(--ring); }
input:disabled { color: var(--fg-3); background: var(--subtle); }
input[type="checkbox"], input[type="radio"] { width: 16px; height: 16px; margin: 0; padding: 0; accent-color: var(--fg); flex: none; }
input[type="color"] { padding: 2px; width: 34px; height: 26px; }
input[type="number"] { padding-right: 4px; }
select { padding-right: 28px; appearance: none; -webkit-appearance: none; cursor: pointer;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath d='M3 4.5l3 3 3-3' fill='none' stroke='%238F8F8F' stroke-width='1.4' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: right 9px center; }
label { font-size: 14px; }
label:where(:has(> input[type="checkbox"]), :has(> input[type="radio"])) { display: inline-flex; align-items: center; gap: 8px; cursor: pointer; }
label.inline { display: inline-flex; align-items: center; gap: 8px; font-size: 13px; color: var(--fg-2); }

.field { display: block; margin: 0 0 16px; }
.field > span { display: flex; align-items: center; margin-bottom: 6px; font-size: 13px; font-weight: 500; color: var(--fg); }
.field > select, .field > input { width: 100%; }

/* segmented control: radios drawn as one switch (Objects, Segmentation model) */
.choices { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 10px; }
.engine-opt .choices { gap: 0; }
.engine-opt .choices > label {
  position: relative; display: inline-flex; align-items: center; height: 34px; padding: 0 14px;
  font-size: 13.5px; color: var(--fg-2); background: var(--card); border: 1px solid var(--border-2);
  margin-left: -1px; cursor: pointer; transition: background .12s linear, color .12s linear;
}
.engine-opt .choices > label:first-child { margin-left: 0; border-radius: var(--r-sm) 0 0 var(--r-sm); }
.engine-opt .choices > label:nth-last-child(2), .engine-opt .choices > label:last-child { border-radius: 0 var(--r-sm) var(--r-sm) 0; }
.engine-opt .choices > label:hover { background: var(--hover); color: var(--fg); }
.engine-opt .choices > label input { position: absolute; opacity: 0; pointer-events: none; }
.engine-opt .choices > label:has(input:checked) { background: var(--inv-bg); border-color: var(--inv-bg); color: var(--inv-fg); z-index: 1; }
.engine-opt .choices > label:has(input:focus-visible) { box-shadow: 0 0 0 3px var(--ring); z-index: 2; }
.engine-opt .choices > label:has(input:disabled) { color: var(--fg-3); background: var(--subtle); cursor: not-allowed; }
.engine-opt .choices .info { margin-left: 10px; }
.engine-opt { margin: 0 0 16px; }
.choices label:has(input:disabled) { color: var(--fg-3); }

.optline, .edge-opt { display: flex; align-items: center; margin: 0 0 12px; }
.edge-opt { margin: 4px 0 0; }
.px-opt { display: flex; align-items: center; flex-wrap: wrap; gap: 8px; margin-top: 4px; }
.px-opt input { width: 7.5em; font-family: var(--mono); }
.chrow { display: flex; align-items: center; gap: 10px; margin: 0 0 8px; }
.chrow input[type="text"] { flex: 1; min-width: 0; }
.chrow label { gap: 8px; white-space: nowrap; }
.chrow .meta { color: var(--fg-2); width: 22px; }

/* ================================================================ start page */
.start { max-width: 1180px; margin: 0 auto; padding-top: 4vh; }
.start .hero { margin-bottom: 40px; }
.start h1 { margin: 0 0 16px; }
.tiles { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.tile {
  display: flex; flex-direction: column; align-items: stretch; height: auto; padding: 0; overflow: hidden;
  text-align: left; white-space: normal; background: var(--card); border: 1px solid var(--border); border-radius: var(--r-lg);
  font-weight: 400; line-height: 1.5;
}
.tile:hover { background: var(--card); border-color: var(--fg-3); }
.tile .tile-art { display: block; height: 168px; color: var(--fg-3); border-bottom: 1px solid var(--border);
  background: var(--subtle) radial-gradient(var(--border-2) 1px, transparent 1.2px) 0 0 / 14px 14px; }
.tile .tile-art svg { width: 100%; height: 100%; display: block; }
.tile:hover .tile-art { color: var(--fg-2); }
.tile .tile-body { display: block; padding: 22px 24px 24px; }
.tile .t { display: flex; align-items: center; justify-content: space-between; gap: 12px; font-size: 20px; font-weight: 600; letter-spacing: -.03em; margin-bottom: 6px; }
.tile .t .go { font-family: var(--mono); font-size: 13px; font-weight: 400; letter-spacing: 0; color: var(--fg-3); transition: color .12s linear, transform .12s linear; }
.tile:hover .t .go { color: var(--fg); transform: translateX(3px); }
.tile .d { display: block; color: var(--fg-2); font-size: 14px; margin-bottom: 18px; }
.tile .tile-steps { display: flex; flex-wrap: wrap; gap: 6px 18px; padding-top: 14px; border-top: 1px solid var(--border); font-family: var(--mono); font-size: 12px; color: var(--fg-3); }
.tile .tile-steps span::before { content: attr(data-n) "  "; white-space: pre; color: var(--fg-3); }
.tile .tile-steps span { color: var(--fg-2); }
.env { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); margin-top: 16px; background: var(--card); border: 1px solid var(--border); border-radius: var(--r-lg); }
.env > div { padding: 16px 20px; border-left: 1px solid var(--border); min-width: 0; }
.env > div:first-child { border-left: 0; }
.env .k { display: block; font-size: 13px; color: var(--fg-3); margin-bottom: 4px; }
.env .v { display: block; font-family: var(--mono); font-size: 13px; color: var(--fg); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
@media (max-width: 860px) { .tiles, .env { grid-template-columns: 1fr; } .env > div { border-left: 0; border-top: 1px solid var(--border); } .env > div:first-child { border-top: 0; } }

/* ================================================================ upload */
.upload-grid { display: grid; grid-template-columns: minmax(0, 1.35fr) minmax(300px, .65fr); gap: 16px; align-items: start; }
.upload-card { padding: 20px 22px; }
.drop {
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 16px;
  min-height: 300px; padding: 28px; cursor: pointer; text-align: center;
  background: var(--subtle); border: 1px dashed var(--border-3); border-radius: var(--r);
  transition: border-color .12s linear, background .12s linear;
}
.drop:hover, .drop.over { border-color: var(--fg); background: var(--hover); }
.drop-prompt { display: flex; flex-direction: column; align-items: center; gap: 8px; }
.drop-icon { width: 40px; height: 40px; display: inline-flex; align-items: center; justify-content: center; border: 1px solid var(--border-2); border-radius: 50%; background: var(--card); color: var(--fg-2); margin-bottom: 6px; }
.drop-icon svg { width: 18px; height: 18px; }
.drop .dt { font-size: 15px; font-weight: 500; }
.drop .dm { font-family: var(--mono); font-size: 12px; color: var(--fg-3); }
.upload-help h3 { margin-bottom: 14px; }
.kv { margin: 0; }
.kv dt { font-size: 13px; font-weight: 500; color: var(--fg); margin: 0 0 3px; }
.kv dd { margin: 0 0 14px; font-size: 13px; color: var(--fg-2); line-height: 1.55; }
.kv dd:last-child { margin-bottom: 0; }
@media (max-width: 960px) { .upload-grid { grid-template-columns: 1fr; } }

.thumbs { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; }
.thumbs:empty { display: none; }
.thumb { width: 76px; display: flex; flex-direction: column; align-items: center; gap: 4px; animation: fadein .16s linear; }
.thumb .box { width: 76px; height: 76px; border-radius: var(--r-sm); border: 1px solid var(--border); background: var(--stage);
  overflow: hidden; display: flex; align-items: center; justify-content: center; }
.thumb .box img { width: 100%; height: 100%; object-fit: cover; display: block; }
.thumb .box .ext { font-family: var(--mono); font-size: 11px; color: #A1A1A1; }
.thumb .fn { font-family: var(--mono); font-size: 10.5px; color: var(--fg-3); max-width: 76px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
@keyframes fadein { from { opacity: 0; } to { opacity: 1; } }

/* ================================================================ progress and messages */
.loading { display: inline-flex; align-items: center; gap: 12px; margin: 6px 0; font-size: 13px; }
.controls .loading, .card-foot .loading { flex: 1 1 auto; }
.prog { position: relative; flex: none; width: 200px; height: 4px; overflow: hidden; background: var(--border); border-radius: 4px; }
.controls .prog { width: 100%; max-width: 220px; }
.prog > i { display: block; height: 100%; width: 0; background: var(--fg); border-radius: 4px; transition: width .35s linear; }
.prog.run::after { content: ""; position: absolute; top: 0; bottom: 0; left: 0; width: 30%; background: var(--fg); opacity: .3; border-radius: 4px; animation: slide 1.15s linear infinite; }
@keyframes slide { from { transform: translateX(-110%); } to { transform: translateX(370%); } }

.flag, .rejected, .result-box {
  position: relative; margin: 10px 0 0; padding: 9px 12px 9px 36px; font-size: 13px; line-height: 1.5; color: var(--fg);
  background: var(--subtle); border: 1px solid var(--border); border-radius: var(--r-sm);
}
.flag::before, .rejected::before, .result-box::before {
  content: "!"; position: absolute; left: 11px; top: 10px; width: 16px; height: 16px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center; font-family: var(--mono); font-size: 10.5px; font-weight: 700;
  border: 1.5px solid var(--fg); color: var(--fg); box-sizing: border-box;
}
.result-box::before { content: ""; background: var(--fg) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='M4.5 8.2l2.3 2.3 4.7-4.9' fill='none' stroke='white' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center / 14px no-repeat; }
:root[data-theme="dark"] .result-box::before, .surface .result-box::before { background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='M4.5 8.2l2.3 2.3 4.7-4.9' fill='none' stroke='black' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E"); }
.flag b { font-weight: 600; }
td .flag { margin: 4px 0; padding: 4px 8px 4px 28px; font-size: 12px; }
td .flag::before { left: 7px; top: 5px; width: 14px; height: 14px; font-size: 9.5px; }
.formula {
  display: flex; align-items: baseline; gap: 12px; flex-wrap: wrap; margin: 0 0 16px; padding: 12px 14px;
  background: var(--subtle); border: 1px solid var(--border); border-radius: var(--r-sm);
}
.formula .fx-label { font-size: 13px; font-weight: 500; color: var(--fg-2); }
.formula .fx-val { font-family: var(--mono); font-size: 16px; font-weight: 500; color: var(--fg); }
.formula .fx-eq { font-family: var(--mono); font-size: 12.5px; color: var(--fg-2); }
.formula .fx-note { font-family: var(--mono); font-size: 12px; color: var(--fg-3); }

/* ================================================================ info tips */
.info { position: relative; display: inline-flex; align-items: center; vertical-align: middle; margin-left: 6px; cursor: help; outline: none; }
.info-i { display: inline-flex; align-items: center; justify-content: center; width: 16px; height: 16px;
  border: 1px solid var(--border-3); border-radius: 50%; font-family: var(--mono); font-size: 10px; font-weight: 600;
  line-height: 1; color: var(--fg-3); text-transform: none; transition: color .12s linear, border-color .12s linear; }
.info:hover .info-i, .info:focus .info-i, .info:focus-within .info-i { color: var(--fg); border-color: var(--fg); }
.info-tip { display: none; position: absolute; top: calc(100% + 8px); left: -10px; z-index: 30; width: max-content; max-width: 340px;
  padding: 10px 12px; background: var(--inv-bg); color: var(--inv-fg); border-radius: var(--r-sm);
  font-family: var(--font); font-size: 12.5px; font-weight: 400; line-height: 1.5; letter-spacing: normal;
  text-transform: none; white-space: normal; text-align: left; }
.info-tip code { background: transparent; border-color: currentColor; color: inherit; opacity: .9; }
.info.right .info-tip, .info.flip .info-tip { left: auto; right: -10px; }
.info.up .info-tip { top: auto; bottom: calc(100% + 8px); }
.info:hover .info-tip, .info:focus .info-tip, .info:focus-within .info-tip { display: block; }
.info-tip p { margin: 0 0 6px; } .info-tip p:last-child { margin-bottom: 0; }

/* ================================================================ single image workspace */
#workspace { display: grid; grid-template-columns: 380px minmax(0, 1fr); gap: 16px; align-items: start; }
.controls { min-width: 0; }
.controls > .panel-head { grid-column: 1 / -1; }
.viewer {
  min-width: 0; position: sticky; top: var(--sticky); overflow: hidden;
  background: var(--card); border: 1px solid var(--border); border-radius: var(--r-lg);
}
.viewer-bar { display: flex; align-items: center; gap: 10px; padding: 10px 12px; border-bottom: 1px solid var(--border); min-width: 0; }
.stage { background: var(--stage); display: flex; align-items: center; justify-content: center; padding: 12px; }
#bigimg { display: block; width: 100%; max-height: calc(100vh - var(--sticky) - 196px); object-fit: contain; cursor: zoom-in; }
#bigimg:not([src]), #bigimg[src=""] { visibility: hidden; min-height: 320px; }
#caption { display: flex; align-items: center; gap: 10px; padding: 9px 14px; border-top: 1px solid var(--border);
  font-family: var(--mono); font-size: 12px; color: var(--fg-3); min-height: 38px; }
#caption span:first-child { color: var(--fg); }

/* view switcher: one row of tabs above the image */
.views { display: flex; align-items: center; gap: 2px; overflow-x: auto; min-width: 0; flex: 1 1 auto; scrollbar-width: none; }
.views::-webkit-scrollbar { display: none; }
.viewbtn {
  display: inline-flex; align-items: center; gap: 7px; height: 30px; padding: 0 10px; flex: none;
  font-size: 13px; font-weight: 400; color: var(--fg-2); background: none; border: 1px solid transparent; border-radius: var(--r-sm);
}
.viewbtn:hover { background: var(--hover); color: var(--fg); border-color: transparent; }
.viewbtn.active { background: var(--subtle); color: var(--fg); border-color: var(--border-2); }
.viewbtn .vn { font-family: var(--mono); font-size: 11px; color: var(--fg-3); }
.viewbtn.active .vn { color: var(--fg); }
.viewbtn .vlabel { max-width: 160px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.viewbtn .meta { margin-left: 2px !important; color: var(--fg-2); }
/* the inspector and display tools list the same buttons vertically */
.insp-side .viewbtn { display: flex; width: 100%; height: 34px; margin: 0 0 2px; }

@media (max-width: 1180px) {
  #workspace { grid-template-columns: 1fr; }
  .viewer { position: static; }
}

/* ================================================================ batch workspace */
.work-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr); gap: 16px; align-items: start; }
.work-left { min-width: 0; }
.work-right { min-width: 0; position: sticky; top: var(--sticky); }
.viewer-inline { display: flex; flex-direction: column; overflow: hidden; height: max(420px, calc(100vh - var(--sticky) - 100px));
  background: var(--card); border: 1px solid var(--border); border-radius: var(--r-lg); }
.vi-head, .vi-views { display: flex; align-items: center; gap: 8px; padding: 10px 12px; border-bottom: 1px solid var(--border); min-width: 0; }
.vi-head strong { font-family: var(--mono); font-weight: 500; font-size: 12.5px; min-width: 0; }
.vi-img { position: relative; flex: 1 1 auto; min-height: 0; display: flex; align-items: center; justify-content: center; padding: 12px; background: var(--stage); cursor: zoom-in; }
.vi-img img { max-width: 100%; max-height: 100%; object-fit: contain; display: block; }
.vi-img.empty { cursor: default; }
.vi-img.empty img { display: none; }
.vi-empty { display: none; font-family: var(--mono); font-size: 12px; color: #8F8F8F; }
.vi-img.empty .vi-empty { display: block; }
.vi-views select { height: 30px; font-size: 13px; }
.work-left > .panel-head { margin-bottom: 24px; }
@media (max-width: 1080px) {
  .work-grid { grid-template-columns: 1fr; }
  .work-right { position: static; }
  .viewer-inline { height: auto; }
  .vi-img { height: 60vh; flex: none; }
}

/* condition summary: one cell per condition, as a small stats strip */
.cond-grid { display: flex; flex-wrap: wrap; width: fit-content; max-width: 100%; border: 1px solid var(--border); border-radius: var(--r); overflow: hidden; }
.cond-cell { width: 220px; padding: 12px 14px; border-right: 1px solid var(--border); border-bottom: 1px solid var(--border); margin: 0 -1px -1px 0; min-width: 0; }
.cond-cell .cn { display: block; font-family: var(--mono); font-size: 13px; color: var(--fg); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.cond-cell .cc { display: block; font-size: 12.5px; color: var(--fg-3); margin-top: 2px; }
.cond-cell.control .cc { color: var(--fg); font-weight: 500; }

/* ================================================================ tables */
.tbar { display: flex; align-items: center; justify-content: space-between; gap: 10px 24px; flex-wrap: wrap; margin: 0 0 14px; }
.tbar-group { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.tbar select { max-width: 190px; height: 32px; font-size: 13px; }
.tablewrap { overflow: auto; max-height: 56vh; border: 1px solid var(--border); border-radius: var(--r); }
table.batch { width: 100%; border-collapse: separate; border-spacing: 0; font-size: 13.5px; }
table.batch th {
  position: sticky; top: 0; z-index: 1; padding: 9px 12px; text-align: left; white-space: nowrap;
  font-size: 12.5px; font-weight: 500; color: var(--fg-2); background: var(--subtle); border-bottom: 1px solid var(--border);
}
table.batch th.raw { font-family: var(--mono); font-size: 12px; }
table.batch td { padding: 10px 12px; border-bottom: 1px solid var(--border); vertical-align: middle; }
table.batch tbody tr:last-child td { border-bottom: 0; }
table.batch tbody tr:hover td { background: var(--subtle); }
table.batch td.num, table.batch th.num { text-align: right; }
table.batch td.num { font-family: var(--mono); font-size: 12.5px; }
table.batch img { width: 88px; height: auto; background: var(--stage); border-radius: 4px; cursor: zoom-in; display: block; }
table.batch tr.needs_attention td { background: var(--subtle); }
table.batch input[type="text"] { width: 100%; min-width: 120px; max-width: 240px; height: 32px; }
table.batch input[type="number"] { width: 84px; height: 32px; font-family: var(--mono); }
table.batch .files { margin-top: 2px; font-family: var(--mono); font-size: 11.5px; color: var(--fg-3); }
.block > table.batch, .card-body > table.batch { border: 1px solid var(--border); border-radius: var(--r); overflow: hidden; }
.segrow { cursor: pointer; }
.segrow.sel td { background: var(--hover) !important; }
.segrow.sel td:first-child { box-shadow: inset 2px 0 0 var(--fg); }
#segresults table.batch { border: 1px solid var(--border); border-radius: var(--r); overflow: hidden; }

/* ================================================================ measurements and plots */
.meas-grid { display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(280px, 1fr); gap: 24px 48px; align-items: start; }
.meas-options { padding-left: 24px; border-left: 1px solid var(--border); }
.cmp-pickers { display: grid; grid-template-columns: repeat(2, minmax(0, max-content)); gap: 0 48px; }
.cmp-pickers label { display: flex; align-items: center; gap: 8px; margin: 0 0 7px; font-size: 13.5px; }
.picker-title { font-size: 13px; font-weight: 500; color: var(--fg-3); margin: 0 0 10px; }
@media (max-width: 900px) { .meas-grid { grid-template-columns: 1fr; } .meas-options { padding-left: 0; border-left: 0; } }

.plot-wrap { display: grid; grid-template-columns: 248px minmax(0, 1fr); gap: 0; padding: 0 !important; overflow: hidden; }
.plot-controls { padding: 20px; border-right: 1px solid var(--border); background: var(--card); }
.plot-controls > label { display: block; margin: 0 0 14px; font-size: 13px; font-weight: 500; color: var(--fg); }
.plot-controls > label > select, .plot-controls > label > input[type="number"], .plot-controls > label > input[type="text"] { display: block; width: 100%; margin-top: 6px; }
.plot-controls > label:has(input[type="checkbox"]) { display: flex; align-items: center; gap: 8px; font-weight: 400; }
.plot-controls .note { margin: 4px 0 0; font-size: 12.5px; }
.plot-preview { min-width: 0; padding: 20px; background: var(--card); }
.plot-fig { min-height: 80px; }
.plot-fig img, .cmpimg { max-width: 100%; display: block; cursor: zoom-in; background: #FFFFFF; border-radius: 4px; }
.plot-preview .actionrow { padding-top: 14px; margin-top: 16px; border-top: 1px solid var(--border); }
.picker-group { margin-top: 16px; }
.picker-list { max-height: 148px; overflow: auto; padding: 8px 10px; border: 1px solid var(--border); border-radius: var(--r-sm); background: var(--card); }
.picker-list label { display: flex; align-items: center; gap: 8px; margin: 3px 0; font-size: 13px; }
#pos-out table.batch { border: 1px solid var(--border); border-radius: var(--r); overflow: hidden; margin-bottom: 4px; }
@media (max-width: 1080px) { .plot-wrap { grid-template-columns: 1fr; } .plot-controls { border-right: 0; border-bottom: 1px solid var(--border); } }

/* tabs inside a step (analysis views) */
.tabs { display: flex; gap: 4px; margin: 0 0 16px; border-bottom: 1px solid var(--border); }
.tab { position: relative; z-index: 0; height: 40px; padding: 0 12px; background: none; border: 0; border-radius: 0; font-size: 14px; font-weight: 400; color: var(--fg-3); }
.tab::before { content: ""; position: absolute; left: 2px; right: 2px; top: 6px; bottom: 6px; border-radius: var(--r-sm); z-index: -1; }
.tab:hover { background: none; color: var(--fg); }
.tab:hover::before { background: var(--hover); }
.tab.active { color: var(--fg); font-weight: 500; }
.tab.active::after { content: ""; position: absolute; left: 12px; right: 12px; bottom: -1px; height: 2px; background: var(--fg); border-radius: 2px 2px 0 0; }
.note + .tabs { margin-top: 12px; }
.tabpanel { position: relative; z-index: 0; }

/* ================================================================ full-screen tools */
#lightbox { position: fixed; inset: 0; z-index: 40; display: none; align-items: center; justify-content: center; background: rgba(0, 0, 0, .9); cursor: zoom-out; }
#lightbox img { max-width: 94vw; max-height: 94vh; background: var(--stage); border-radius: 4px; }
#inspector, #viewer, #editor { position: fixed; inset: 0; z-index: 20; display: none; flex-direction: column; background: var(--page); color: var(--fg); }
#editor { z-index: 30; }
#inspector.show, #viewer.show, #editor.show { display: flex; }
.insp-head, .ed-bar { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; min-height: 56px; padding: 10px 16px; background: var(--card); border-bottom: 1px solid var(--border); }
.insp-head strong, .ed-bar strong { font-size: 14px; font-weight: 600; letter-spacing: -.01em; margin-right: 6px; }
.insp-body { flex: 1; display: flex; min-height: 0; }
.insp-side { width: 288px; flex: none; padding: 16px; overflow: auto; background: var(--card); border-right: 1px solid var(--border); }
.insp-side h3 { font-size: 13px; color: var(--fg-2); font-weight: 500; }
.insp-view { flex: 1; min-width: 0; display: flex; align-items: center; justify-content: center; padding: 16px; background: var(--stage); }
.insp-view img { max-width: 100%; max-height: 100%; object-fit: contain; }
.bar-sep { width: 1px; height: 20px; margin: 0 4px; background: var(--border-2); }
#vw-channels .vw-ch { padding: 12px 0; border-bottom: 1px solid var(--border); }
#vw-channels .vw-ch:last-child { border-bottom: 0; }
#vw-channels .chrow { margin: 0; }
#vw-channels canvas.vw-hist { display: block; width: 100%; height: 40px; margin: 8px 0 6px; background: var(--subtle); border: 1px solid var(--border); border-radius: 4px; }
#vw-channels .vw-mm { display: flex; align-items: center; gap: 8px; font-family: var(--mono); font-size: 11px; color: var(--fg-3); margin-top: 4px; }
#vw-channels .vw-mm span { width: 26px; }
#vw-channels .vw-mm input[type="range"] { flex: 1; min-width: 0; height: auto; padding: 0; border: 0; accent-color: var(--fg-2); background: none; box-shadow: none; }
#vw-channels .vw-mm input[type="number"] { width: 72px; height: 28px; padding: 0 6px; font-family: var(--mono); font-size: 12px; }
#vw-channels .vw-auto { height: 26px; padding: 0 8px; font-size: 12px; }
#vw-seg label { display: flex; align-items: center; gap: 8px; margin: 6px 0; font-size: 13.5px; }
.ed-stage { position: relative; flex: 1; overflow: hidden; background: var(--stage); }
#ed-canvas { display: block; cursor: crosshair; }
.ed-bar button.active, .ed-bar button.active:hover { background: var(--inv-bg); color: var(--inv-fg); border-color: var(--inv-bg); }
#ed-count { font-family: var(--mono); font-size: 12px; color: var(--fg-2); }
.modal-card { max-width: 400px; padding: 20px 22px; font-size: 14px; color: var(--fg); background: var(--card); border: 1px solid var(--border-2); border-radius: var(--r-lg); }

@media (max-width: 760px) {
  :root { --gutter: 16px; }
  #topbar { padding: 0 12px; gap: 8px; }
  .status { display: none; }
}
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
}

/* ================================================================ engine screen
   Hosted interface only: shown over everything while the engine on this computer is not
   reachable, with the commands to install and start it. */
#engine {
  position: fixed; inset: 0; z-index: 100; display: flex; align-items: flex-start; justify-content: center;
  padding: 72px 16px 32px; overflow-y: auto; background: var(--page);
}
#engine.hidden { display: none; }
.engine-card {
  width: 100%; max-width: 640px; padding: 28px 28px 22px;
  background: var(--card); border: 1px solid var(--border); border-radius: var(--r-lg);
}
.engine-card h2 { font-size: 22px; letter-spacing: -.02em; margin-bottom: 8px; }
.engine-lead { color: var(--fg-2); margin: 0 0 18px; line-height: 1.55; }
.engine-card pre {
  margin: 6px 0 14px; padding: 12px 14px; overflow-x: auto;
  background: var(--code-bg); border: 1px solid var(--border); border-radius: var(--r);
}
.engine-card pre code { background: none; border: 0; padding: 0; white-space: pre; font-size: 12.5px; line-height: 1.6; }
.engine-card .meta { display: block; margin-top: 4px; }
.engine-tabs { display: flex; gap: 6px; margin: 4px 0 10px; }
.engine-tabs .on { background: var(--inv-bg); color: var(--inv-fg); border-color: var(--inv-bg); }
.engine-old { padding: 12px 14px 2px; margin-bottom: 16px; border: 1px solid var(--border-2); border-radius: var(--r); }
.engine-old p { margin: 0 0 6px; }
.engine-foot { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-top: 18px; padding-top: 16px; border-top: 1px solid var(--border); }

/* Start page: setup check, shown only when a dependency is missing or too old */
.env .v.warn { color: var(--fg); font-weight: 600; }
#deps-panel { margin-top: 16px; padding: 20px 22px; background: var(--card); border: 1px solid var(--border-2); border-radius: var(--r-lg); }
#deps-panel .deps-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 16px; margin-bottom: 14px; }
#deps-panel h3 { font-size: 15px; margin-bottom: 4px; }
#deps-panel .note { margin: 0; }
.deps-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.deps-table th { text-align: left; font-weight: 500; color: var(--fg-3); padding: 6px 0; border-bottom: 1px solid var(--border); }
.deps-table td { padding: 7px 0; border-bottom: 1px solid var(--border); font-family: var(--mono); color: var(--fg-2); }
#deps-panel pre { margin: 14px 0 0; padding: 12px 14px; overflow-x: auto; background: var(--code-bg); border: 1px solid var(--border); border-radius: var(--r); }
#deps-panel pre code { background: none; border: 0; padding: 0; white-space: pre; }
@media (max-width: 900px) { .env { grid-template-columns: repeat(2, minmax(0, 1fr)); } .env > div:nth-child(3) { border-left: 0; } .env > div:nth-child(n+3) { border-top: 1px solid var(--border); } }

/* ================================================================ landing
   First page: the logo typing itself once, one line, "Install dependencies" (to the repository)
   and "Check dependencies"; the start page opens once the check passes. The header keeps only
   the repository link and the theme switch here. */
body.landing #topbar .logo, body.landing #device-chip, body.landing #outdir-pick,
body.landing #restart, body.landing .crumb-sep, body.landing #crumb { display: none !important; }
body.landing #topbar { justify-content: flex-end; background: transparent; border-bottom-color: transparent; }
#landing {
  min-height: calc(100vh - var(--head) - 80px); display: flex; flex-direction: column;
  align-items: center; justify-content: center; text-align: center; padding: 0 16px 6vh;
}
.landing-desc { max-width: 52ch; margin: -18px 0 32px; color: var(--fg-2); font-size: 15px; line-height: 1.6; }
.logo.big { --lh: 76px; cursor: default; margin-bottom: 28px; }
.logo.big .caret::after { width: calc(90 * var(--u)); }
.logo.play .x { width: calc(var(--w) * var(--u)); transition-delay: calc(var(--lead) + var(--i) * var(--step)); }
.logo.play .c1 { animation: logo-caret-type calc(var(--lead) + 8 * var(--step)) steps(1) forwards; }
.logo.big { --step: 90ms; --lead: 350ms; }
.landing-sub { max-width: 44ch; margin: 0 0 32px; color: var(--fg-2); font-size: 16px; line-height: 1.55; }
.landing-actions { display: flex; gap: 10px; flex-wrap: wrap; justify-content: center; }
#landing-result { min-height: 28px; margin-top: 22px; max-width: 560px; width: 100%; }
#landing-result p { margin: 0 0 6px; }
.landing-ok, .landing-bad { font-weight: 500; color: var(--fg); }
.landing-ok::before { content: "✓  "; }
.landing-list { list-style: none; margin: 8px 0 10px; padding: 0; text-align: left; border-top: 1px solid var(--border); }
.landing-list li { display: flex; justify-content: space-between; gap: 12px; padding: 8px 2px; border-bottom: 1px solid var(--border); font-size: 13px; }
#landing-result pre { margin: 0 0 10px; padding: 10px 12px; text-align: left; overflow-x: auto; background: var(--code-bg); border: 1px solid var(--border); border-radius: var(--r); }
#landing-result pre code { background: none; border: 0; padding: 0; white-space: pre; }
#landing .landing-sub { font-size: 17px; color: var(--fg); }

/* Below the fold: screenshot, validation numbers, the four steps, three points, quick start,
   footer. Same monochrome rules as the app: hairline borders, no shadows, colour only in the
   screenshots. Hidden with the hero once the user enters the app. */
body:not(.landing) #landing-more { display: none; }
#landing-more { padding: 0 24px; }
#landing-more img.dk { display: none; }
:root[data-theme="dark"] #landing-more img.li { display: none; }
:root[data-theme="dark"] #landing-more img.dk { display: block; }
.landing-shot { max-width: 1060px; margin: 0 auto; padding: 0 0 72px; }
.landing-shot img, .how-grid img { width: 100%; height: auto; border: 1px solid var(--border); border-radius: var(--r-lg); }
.landing-block { max-width: 1060px; margin: 0 auto; padding: 64px 0 72px; border-top: 1px solid var(--border); }
.landing-block h2 { margin: 0 0 28px; font-size: 22px; font-weight: 600; letter-spacing: -.02em; }

.landing-stats { text-align: center; }
.landing-kicker { margin: 0 0 20px; color: var(--fg-2); font-size: 13.5px; }
.stats-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--border); border: 1px solid var(--border); border-radius: var(--r); overflow: hidden; }
.stats-row > div { background: var(--card); padding: 24px 14px 20px; }
.stats-row b { display: block; margin-bottom: 4px; font-family: var(--mono); font-size: 26px; font-weight: 600; letter-spacing: -.02em; }
.stats-row span { color: var(--fg-2); font-size: 12.5px; line-height: 1.45; display: inline-block; max-width: 22ch; }

.how-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 28px 24px; }
.how-grid figure { position: relative; margin: 0; }
.how-grid img { border-radius: var(--r); }
.how-grid .n { font-family: var(--mono); font-size: 12px; color: var(--fg-3); display: block; margin-bottom: 8px; }
.how-grid figcaption { margin-top: 10px; font-size: 13px; color: var(--fg-2); line-height: 1.55; }
.how-grid figcaption b { display: block; color: var(--fg); font-weight: 600; margin-bottom: 2px; }

.landing-points { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; }
.landing-points h3 { margin: 0 0 8px; font-size: 15px; font-weight: 600; }
.landing-points p { margin: 0; font-size: 13.5px; color: var(--fg-2); line-height: 1.6; }

.landing-start { text-align: center; }
.landing-start-lead { max-width: 52ch; margin: 0 auto 18px; color: var(--fg-2); font-size: 14px; }
.landing-start pre { max-width: 560px; margin: 0 auto 22px; padding: 14px 18px; text-align: left; overflow-x: auto; background: var(--code-bg); border: 1px solid var(--border); border-radius: var(--r); }
.landing-start pre code { background: none; border: 0; padding: 0; white-space: pre; font-size: 13px; }

.landing-foot { max-width: 1060px; margin: 0 auto; padding: 28px 0 40px; border-top: 1px solid var(--border); display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap; font-size: 13px; color: var(--fg-3); }
.landing-foot nav { display: flex; gap: 20px; }
.landing-foot a { color: var(--fg-2); text-decoration: none; }
.landing-foot a:hover { color: var(--fg); }

@media (max-width: 760px) {
  .stats-row { grid-template-columns: 1fr 1fr; }
  .how-grid, .landing-points { grid-template-columns: 1fr; }
  .landing-block { padding: 44px 0 52px; }
}