:root {
  --paper: #efe9d8;
  --paper-2: #e5deca;
  --paper-3: #d8cfb7;
  --ink: #15191c;
  --ink-2: #242a2d;
  --muted: #6f746f;
  --line: #bdb49f;
  --teal: #177b79;
  --teal-dark: #105f5e;
  --teal-soft: #a9cfca;
  --mint: #5fc79a;
  --red: #be5b48;
  --amber: #b7883d;
  --white: #fffdf5;
  --shadow: 0 14px 35px rgba(31, 35, 34, .12);
  --radius: 4px;
  --mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  --sans: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}
* { box-sizing: border-box; }
html { min-height: 100%; background: var(--paper); color: var(--ink); scroll-behavior: smooth; }
body { margin: 0; min-width: 320px; min-height: 100vh; font-family: var(--sans); background:
  linear-gradient(rgba(21,25,28,.025) 1px, transparent 1px),
  linear-gradient(90deg, rgba(21,25,28,.025) 1px, transparent 1px), var(--paper);
  background-size: 32px 32px; }
button, input, select, textarea { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
button { cursor: pointer; }
a { color: inherit; }
[hidden] { display: none !important; }
.app-shell { min-height: 100vh; display: grid; grid-template-rows: auto 1fr auto; }
.topbar { position: sticky; top: 0; z-index: 30; min-height: 76px; display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; gap: 24px; padding: 12px clamp(18px, 4vw, 54px); border-bottom: 1px solid var(--line); background: color-mix(in srgb, var(--paper) 93%, transparent); backdrop-filter: blur(14px); }
.brand { display: inline-flex; gap: 12px; align-items: center; text-decoration: none; width: max-content; }
.brand strong { display: block; font: 700 19px/1 var(--mono); letter-spacing: .14em; color: var(--teal); }
.brand small { display: block; font: 600 10px/1.5 var(--mono); letter-spacing: .34em; }
.brand-mark { display: grid; grid-template-columns: repeat(2, 9px); gap: 2px; padding: 3px; border: 1px solid var(--ink); }
.brand-mark span { width: 9px; height: 9px; background: var(--ink); }
.brand-mark span:nth-child(2), .brand-mark span:nth-child(3) { background: var(--teal); }
.main-nav { display: flex; gap: 4px; padding: 4px; border: 1px solid var(--line); background: rgba(255,255,255,.2); }
.main-nav a { text-decoration: none; padding: 9px 15px; font: 700 11px var(--mono); letter-spacing: .08em; text-transform: uppercase; border-radius: 2px; }
.main-nav a:hover, .main-nav a.active { background: var(--ink); color: var(--paper); }
.top-actions, .heading-actions, .hero-actions, .button-row { display: flex; align-items: center; gap: 10px; }
.top-actions { justify-content: flex-end; }
.button { border: 1px solid var(--ink); border-radius: 2px; padding: 11px 16px; min-height: 42px; background: transparent; font: 700 11px var(--mono); letter-spacing: .08em; text-transform: uppercase; transition: transform .15s, background .15s, box-shadow .15s; display: inline-flex; align-items: center; justify-content: center; text-decoration: none; }
.button:hover { transform: translateY(-1px); box-shadow: 3px 3px 0 rgba(21,25,28,.18); }
.button:active { transform: translateY(0); box-shadow: none; }
.button-primary { background: var(--teal); color: white; border-color: var(--teal-dark); }
.button-dark { background: var(--ink); color: var(--paper); }
.button-quiet { border-color: var(--line); background: rgba(255,255,255,.16); }
.button-danger { background: var(--red); border-color: #8d3e30; color: white; }
.button-large { min-height: 48px; padding: 14px 20px; }
.button-block { width: 100%; }
.text-button { background: none; border: 0; border-bottom: 1px solid; padding: 0; margin-left: auto; font: 700 10px var(--mono); letter-spacing: .06em; text-transform: uppercase; }
.icon-button { width: 38px; height: 38px; border: 1px solid var(--line); background: transparent; font-size: 20px; display: inline-grid; place-items: center; border-radius: 2px; }
.icon-button:hover { background: var(--ink); color: var(--paper); }
main { width: 100%; }
.view { padding: clamp(28px, 4vw, 58px) clamp(18px, 4vw, 54px) 64px; animation: fade-in .22s ease both; }
@keyframes fade-in { from { opacity: 0; transform: translateY(3px); } }
.hero-row, .page-heading { max-width: 1500px; margin: 0 auto 28px; display: flex; justify-content: space-between; gap: 30px; align-items: flex-end; }
.hero-row h1, .page-heading h1 { margin: 0; font-size: clamp(36px, 5.2vw, 76px); line-height: .98; letter-spacing: -.045em; font-weight: 780; }
.hero-row h1 span { color: var(--teal); }
.page-heading h1 { font-size: clamp(34px, 4vw, 62px); }
.lead, .page-heading p { max-width: 760px; color: #4f5551; font-size: clamp(15px, 1.5vw, 19px); line-height: 1.55; }
.eyebrow { margin: 0 0 12px !important; font: 700 11px var(--mono) !important; letter-spacing: .16em; text-transform: uppercase; color: var(--teal) !important; }
.hero-actions { flex-direction: column; min-width: 220px; }
.hero-actions .button { width: 100%; }
.privacy-strip { max-width: 1500px; margin: 0 auto 22px; border: 1px solid var(--line); padding: 12px 16px; display: flex; align-items: center; gap: 10px; background: rgba(255,255,255,.18); font-size: 13px; }
.status-dot { width: 9px; height: 9px; border-radius: 50%; background: var(--mint); box-shadow: 0 0 0 3px rgba(95,199,154,.18); }
.library-workspace { max-width: 1500px; margin: 0 auto; display: grid; grid-template-columns: minmax(0, 1fr) 340px; gap: 18px; align-items: start; }
.panel { border: 1px solid var(--line); background: color-mix(in srgb, var(--paper) 88%, white); box-shadow: 0 1px 0 rgba(255,255,255,.5) inset; }
.panel-heading, .palette-heading { display: flex; justify-content: space-between; align-items: flex-start; gap: 16px; padding: 18px; border-bottom: 1px solid var(--line); }
.panel-heading.compact { align-items: center; }
.panel-heading h2, .palette-heading h2, .settings-content h2 { margin: 2px 0 4px; font-size: 17px; text-transform: uppercase; letter-spacing: .03em; }
.panel-heading p { margin: 0; color: var(--muted); font: 11px var(--mono); }
.section-index { display: inline-block; color: var(--teal); font: 700 10px var(--mono); letter-spacing: .18em; }
.library-toolbar { display: flex; gap: 8px; }
.search-field { display: flex; align-items: center; gap: 7px; border: 1px solid var(--line); padding: 0 10px; background: rgba(255,255,255,.25); }
.search-field input { border: 0; background: transparent; min-height: 38px; outline: none; min-width: 180px; }
select, input[type="text"], input[type="search"], input[type="number"], input:not([type]) { border: 1px solid var(--line); background: rgba(255,255,255,.3); min-height: 42px; padding: 8px 10px; color: var(--ink); border-radius: 1px; }
input:focus, select:focus { outline: 2px solid var(--teal-soft); outline-offset: 1px; border-color: var(--teal); }
.tool-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 14px; padding: 14px; }
.tool-card { border: 1px solid var(--line); background: var(--paper-2); min-width: 0; position: relative; transition: transform .15s, box-shadow .15s, border-color .15s; }
.tool-card:hover { transform: translateY(-2px); box-shadow: var(--shadow); }
.tool-card.selected { border-color: var(--teal); box-shadow: 0 0 0 2px rgba(23,123,121,.15); }
.tool-card-visual { position: relative; height: 170px; background: var(--ink); display: grid; place-items: center; overflow: hidden; }
.tool-card-visual::after { content: ""; position: absolute; inset: 0; background-image: linear-gradient(rgba(255,255,255,.04) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.04) 1px, transparent 1px); background-size: 20px 20px; }
.tool-card-visual svg { width: 90%; height: 82%; position: relative; z-index: 1; }
.tool-card-photo { width: 100%; height: 100%; object-fit: cover; opacity: .48; }
.tool-card-contour { position: absolute; inset: 12px; z-index: 1; }
.select-box { position: absolute; z-index: 3; top: 10px; left: 10px; width: 27px; height: 27px; border: 1px solid var(--paper); background: rgba(21,25,28,.72); display: grid; place-items: center; color: white; }
.select-box input { position: absolute; opacity: 0; }
.select-box:has(input:checked) { background: var(--teal); }
.select-box:has(input:checked)::after { content: "✓"; }
.card-menu { position: absolute; z-index: 3; top: 10px; right: 10px; border: 1px solid rgba(255,255,255,.55); background: rgba(21,25,28,.65); color: white; width: 28px; height: 28px; }
.tool-card-body { padding: 14px; }
.tool-card-body h3 { font: 700 14px var(--mono); margin: 0 0 10px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.tool-meta { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line); padding-top: 9px; gap: 6px; }
.tool-meta span, .metric-list span, .estimate-card span, .measurement-card span { display: block; color: var(--muted); font: 9px var(--mono); text-transform: uppercase; letter-spacing: .07em; }
.tool-meta strong { font: 700 11px var(--mono); }
.tool-tags { display: flex; gap: 5px; flex-wrap: wrap; margin-top: 10px; }
.tag, .badge { border: 1px solid var(--line); padding: 5px 7px; font: 700 9px var(--mono); text-transform: uppercase; letter-spacing: .05em; }
.badge { background: var(--ink); color: var(--paper); }
.compose-panel { position: sticky; top: 94px; padding-bottom: 16px; }
.compose-panel > label, .compose-panel > .field-grid, .compose-panel > .metric-list, .compose-panel > .quick-grid, .compose-panel > button, .compose-panel > p { margin-left: 16px; margin-right: 16px; }
label { display: grid; gap: 6px; font: 700 10px var(--mono); text-transform: uppercase; letter-spacing: .06em; color: #424744; }
label span { font-weight: 500; color: var(--muted); }
.field-grid { display: grid; gap: 10px; }
.field-grid.two { grid-template-columns: repeat(2, minmax(0,1fr)); }
.field-grid.three { grid-template-columns: repeat(3, minmax(0,1fr)); }
.compose-panel label { margin-top: 14px; }
.metric-list { margin-top: 14px; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.metric-list div { padding: 10px 0; display: flex; justify-content: space-between; align-items: center; }
.metric-list div + div { border-top: 1px dashed var(--line); }
.metric-list strong { font: 700 12px var(--mono); }
.quick-grid { margin-top: 14px; display: grid; gap: 2px; padding: 10px; height: 170px; background: var(--ink); }
.quick-grid span { border: 1px solid #475258; background: #222b30; }
.compose-panel .button { margin-top: 10px; width: calc(100% - 32px); }
.microcopy { color: var(--muted); font-size: 11px; line-height: 1.5; }
.empty-state { padding: 60px 24px; text-align: center; }
.empty-state h3 { font-size: 23px; margin: 15px 0 5px; }
.empty-state p { color: var(--muted); max-width: 500px; margin: 0 auto 20px; }
.empty-grid { width: 90px; height: 90px; margin: auto; background: repeating-linear-gradient(0deg, transparent 0 20px, var(--line) 20px 21px), repeating-linear-gradient(90deg, transparent 0 20px, var(--line) 20px 21px); transform: rotate(12deg); }
.center { justify-content: center; }
.project-grid { max-width: 1500px; margin: auto; display: grid; grid-template-columns: repeat(auto-fill, minmax(290px,1fr)); gap: 16px; }
.project-card { border: 1px solid var(--line); background: var(--paper-2); }
.project-preview { height: 210px; background: var(--ink); padding: 18px; display: grid; place-items: center; }
.project-preview svg { max-width: 100%; max-height: 100%; }
.project-body { padding: 15px; }
.project-body h3 { margin: 0 0 6px; font-size: 17px; }
.project-body p { color: var(--muted); font: 11px var(--mono); }
.project-actions { display: flex; gap: 8px; border-top: 1px solid var(--line); padding-top: 12px; }
.trace-layout { max-width: 1500px; margin: auto; display: grid; grid-template-columns: 255px minmax(0,1fr); gap: 18px; align-items: start; }
.trace-steps { position: sticky; top: 94px; padding: 6px; }
.trace-step { width: 100%; border: 0; border-bottom: 1px solid var(--line); background: transparent; text-align: left; padding: 15px 12px; display: grid; grid-template-columns: 35px 1fr; align-items: center; gap: 8px; }
.trace-step span { font: 700 10px var(--mono); color: var(--teal); }
.trace-step strong, .trace-step small { display: block; }
.trace-step strong { font-size: 13px; }
.trace-step small { color: var(--muted); margin-top: 3px; }
.trace-step.active { background: var(--ink); color: var(--paper); }
.trace-step.active small { color: #bfc5c0; }
.trace-main { min-height: 650px; padding: 20px; }
.trace-stage { display: none; }
.trace-stage.active { display: block; animation: fade-in .2s; }
.drop-zone { min-height: 560px; border: 1px dashed var(--line); display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center; gap: 12px; padding: 30px; background: rgba(255,255,255,.13); }
.drop-zone.dragover { border-color: var(--teal); background: rgba(23,123,121,.07); }
.drop-zone input { position: absolute; opacity: 0; pointer-events: none; }
.drop-zone h2 { font-size: 28px; margin: 0; }
.drop-zone p { max-width: 560px; color: var(--muted); }
.drop-icon { width: 75px; height: 75px; display: grid; place-items: center; border: 1px solid var(--ink); font-size: 36px; }
.trace-canvas-wrap { position: relative; border: 1px solid var(--line); background: var(--ink); overflow: auto; min-height: 300px; display: grid; place-items: center; }
.trace-canvas-wrap canvas { display: block; max-width: 100%; max-height: 68vh; touch-action: none; }
.trace-canvas-wrap.calibration canvas { cursor: crosshair; }
.trace-toolbar { margin-bottom: 12px; padding: 12px; border: 1px solid var(--line); background: rgba(255,255,255,.15); }
.trace-toolbar .hint { font-size: 12px; color: var(--muted); margin: 10px 0 0; }
.segmentation-controls { display: flex; align-items: end; gap: 14px; flex-wrap: wrap; }
.segmentation-controls label { min-width: 160px; }
.check-line { grid-template-columns: auto 1fr; align-items: center; justify-content: start; text-transform: none; font-family: var(--sans); font-size: 13px; letter-spacing: 0; }
.check-line input { width: 18px; height: 18px; accent-color: var(--teal); }
.dual-canvas { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 12px; }
.canvas-label { display: block; margin-bottom: 6px; font: 700 10px var(--mono); text-transform: uppercase; letter-spacing: .07em; }
.component-list { display: flex; gap: 8px; flex-wrap: wrap; margin: 12px 0; }
.component-chip { border: 1px solid var(--line); background: transparent; padding: 8px 10px; font: 700 10px var(--mono); }
.component-chip.active { background: var(--teal); color: white; border-color: var(--teal-dark); }
.contour-layout { display: grid; grid-template-columns: minmax(0,1fr) 340px; gap: 18px; }
.contour-editor { min-height: 520px; }
.contour-editor svg { width: 100%; height: 520px; background: #13191c; touch-action: none; }
.tool-properties { display: grid; gap: 13px; align-content: start; }
.measurement-card { border: 1px solid var(--line); padding: 14px; background: var(--paper-2); }
.measurement-card strong { display: block; margin: 5px 0; font: 700 18px var(--mono); }
.button-row { margin-top: 14px; }
.button-row.split { justify-content: space-between; }
.editor-heading { padding: 18px clamp(18px, 3vw, 42px); border-bottom: 1px solid var(--line); display: flex; justify-content: space-between; align-items: end; gap: 20px; }
.editor-heading .eyebrow { margin-bottom: 4px !important; }
.title-edit { display: flex; align-items: center; gap: 12px; }
.title-edit input { border: 0; background: transparent; padding: 0; min-height: 0; font-size: clamp(24px, 3vw, 39px); font-weight: 760; letter-spacing: -.03em; width: min(720px, 55vw); }
.title-edit input:focus { outline: none; border-bottom: 1px solid var(--teal); }
.title-edit span { font: 700 9px var(--mono); color: var(--muted); text-transform: uppercase; }
.editor-shell { min-height: calc(100vh - 155px); display: grid; grid-template-columns: 250px minmax(420px,1fr) 330px; gap: 0; }
.editor-shell > .panel { border-top: 0; border-bottom: 0; box-shadow: none; }
.tool-palette { border-left: 0; }
.settings-panel { border-right: 0; }
.palette-heading { align-items: center; }
.full-input { margin: 12px; width: calc(100% - 24px); }
.palette-list { padding: 0 10px 12px; max-height: calc(100vh - 290px); overflow: auto; }
.palette-item { border: 1px solid var(--line); margin-bottom: 8px; background: var(--paper-2); display: grid; grid-template-columns: 62px 1fr; min-height: 67px; cursor: grab; }
.palette-item:hover { border-color: var(--teal); }
.palette-thumb { background: var(--ink); padding: 6px; display: grid; place-items: center; }
.palette-thumb svg { width: 100%; height: 100%; }
.palette-info { padding: 9px; min-width: 0; }
.palette-info strong { font: 700 11px var(--mono); display: block; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.palette-info span { font: 9px var(--mono); color: var(--muted); }
.palette-help { margin: 0 10px 12px; padding: 10px; border: 1px dashed var(--line); color: var(--muted); font-size: 11px; line-height: 1.45; }
.editor-canvas-panel { border-color: var(--line); background: #11171a; min-width: 0; display: grid; grid-template-rows: auto 1fr auto; }
.mode-bar { min-height: 54px; display: flex; justify-content: space-between; align-items: center; border-bottom: 1px solid #3b454a; background: var(--paper); padding: 6px 10px; }
.mode-tabs { display: flex; }
.mode-tab { border: 1px solid var(--line); padding: 10px 18px; background: transparent; font: 700 10px var(--mono); text-transform: uppercase; letter-spacing: .07em; }
.mode-tab + .mode-tab { border-left: 0; }
.mode-tab.active { background: var(--ink); color: var(--paper); }
.canvas-actions { display: flex; gap: 5px; }
.editor-canvas { position: relative; min-height: 560px; display: none; overflow: hidden; }
.editor-canvas.active { display: block; }
#layoutSvg { width: 100%; height: 100%; min-height: 560px; display: block; touch-action: none; user-select: none; }
#webglCanvas { width: 100%; height: 100%; display: block; touch-action: none; }
.zoom-controls { position: absolute; left: 14px; bottom: 14px; display: flex; align-items: center; background: var(--paper); border: 1px solid var(--line); }
.zoom-controls button { width: 36px; height: 34px; border: 0; background: transparent; }
.zoom-controls output { min-width: 55px; text-align: center; font: 700 10px var(--mono); }
.editor-statusbar { min-height: 36px; border-top: 1px solid #3b454a; color: #bdc5c1; display: flex; justify-content: space-between; align-items: center; gap: 10px; padding: 8px 12px; font: 9px var(--mono); text-transform: uppercase; letter-spacing: .04em; }
.status-ok { color: #71d9a8; }
.status-warning { color: #f0b85e; }
.status-error { color: #ef7968; }
.settings-tabs { display: grid; grid-template-columns: repeat(3,1fr); border-bottom: 1px solid var(--line); }
.settings-tab { border: 0; border-right: 1px solid var(--line); padding: 15px 4px; background: transparent; font: 700 9px var(--mono); text-transform: uppercase; }
.settings-tab:last-child { border-right: 0; }
.settings-tab.active { background: var(--ink); color: var(--paper); }
.settings-content { display: none; max-height: calc(100vh - 155px); overflow: auto; }
.settings-content.active { display: block; }
.settings-content section { padding: 16px; border-bottom: 1px solid var(--line); display: grid; gap: 12px; }
.choice-grid { display: grid; gap: 5px; }
.choice-grid.three { grid-template-columns: repeat(3,1fr); }
.choice { border: 1px solid var(--line); background: transparent; padding: 10px 5px; min-height: 66px; }
.choice strong, .choice small { display: block; }
.choice strong { font: 700 9px var(--mono); text-transform: uppercase; }
.choice small { margin-top: 4px; font-size: 9px; color: var(--muted); }
.choice.active { background: var(--teal); color: white; border-color: var(--teal-dark); }
.choice.active small { color: #d9efeb; }
.muted-box { margin: 16px; border: 1px dashed var(--line); padding: 24px 12px; text-align: center; color: var(--muted); font-size: 12px; }
#selectionControls { padding: 16px; display: grid; gap: 13px; }
.selection-title { display: grid; grid-template-columns: 60px 1fr; gap: 10px; align-items: center; border-bottom: 1px solid var(--line); padding-bottom: 12px; }
#selectionThumb { height: 52px; background: var(--ink); display: grid; place-items: center; }
#selectionThumb svg { width: 90%; height: 90%; }
.selection-title span { color: var(--muted); font: 9px var(--mono); text-transform: uppercase; }
.selection-title strong { display: block; margin-top: 4px; font-size: 14px; }
.rotation-buttons { display: grid; grid-template-columns: repeat(4,1fr); }
.rotation-buttons button { padding: 8px 2px; border: 1px solid var(--line); background: transparent; font: 700 9px var(--mono); }
.estimate-card { border: 1px solid var(--line); background: var(--paper-2); }
.estimate-card div { padding: 10px; display: flex; justify-content: space-between; align-items: center; }
.estimate-card div + div { border-top: 1px dashed var(--line); }
.estimate-card strong { font: 700 11px var(--mono); }
.preview-overlay { position: absolute; inset: 0; display: none; place-items: center; align-content: center; gap: 12px; color: white; background: rgba(13,18,20,.72); z-index: 2; }
.preview-overlay.visible { display: grid; }
.spinner { width: 40px; height: 40px; border: 3px solid rgba(255,255,255,.25); border-top-color: var(--mint); border-radius: 50%; animation: spin 1s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
.preview-hint { position: absolute; bottom: 14px; left: 50%; transform: translateX(-50%); color: #bfc7c3; font: 9px var(--mono); background: rgba(10,14,16,.7); padding: 7px 10px; }
.help-grid { max-width: 1500px; margin: auto; display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 16px; }
.prose-card { border: 1px solid var(--line); background: rgba(255,255,255,.18); padding: clamp(20px,3vw,38px); }
.prose-card.wide { max-width: 1500px; margin: 16px auto 0; }
.prose-card h2 { margin-top: 7px; font-size: 24px; }
.prose-card p, .prose-card li { color: #4d534f; line-height: 1.65; }
.prose-card code { font-family: var(--mono); background: var(--paper-3); padding: 2px 5px; }
.spec-grid { display: grid; grid-template-columns: repeat(6,1fr); border: 1px solid var(--line); }
.spec-grid div { padding: 14px; border-right: 1px solid var(--line); }
.spec-grid div:last-child { border-right: 0; }
.spec-grid span, .spec-grid strong { display: block; }
.spec-grid span { color: var(--muted); font: 9px var(--mono); text-transform: uppercase; }
.spec-grid strong { margin-top: 6px; font: 700 13px var(--mono); }
.legal-note { border-top: 1px solid var(--line); padding-top: 16px; font-size: 12px; }
.modal { width: min(960px, calc(100vw - 30px)); max-height: calc(100vh - 30px); border: 1px solid var(--ink); background: var(--paper); padding: 0; box-shadow: 0 22px 70px rgba(0,0,0,.35); }
.modal::backdrop { background: rgba(12,16,17,.72); backdrop-filter: blur(2px); }
.modal form { padding: 20px; }
.modal-heading { display: flex; justify-content: space-between; align-items: flex-start; border-bottom: 1px solid var(--line); padding-bottom: 14px; margin-bottom: 18px; }
.modal-heading h2 { margin: 0; font-size: 26px; }
.modal-grid { display: grid; grid-template-columns: minmax(0,1fr) 340px; gap: 18px; }
.manual-preview { min-height: 480px; background: var(--ink); position: relative; display: grid; place-items: center; }
.manual-preview svg { width: 95%; height: 92%; }
.preview-scale { position: absolute; left: 10px; bottom: 10px; color: var(--paper); font: 10px var(--mono); }
.small-modal { width: min(520px, calc(100vw - 30px)); }
.backup-actions { display: grid; gap: 10px; margin: 18px 0; }
.file-label { position: relative; }
.file-label input { position: absolute; opacity: 0; }
.storage-stats { border: 1px solid var(--line); padding: 12px; font: 10px var(--mono); line-height: 1.7; }
.export-choice { width: 100%; text-align: left; border: 1px solid var(--line); background: var(--paper-2); padding: 14px; margin-bottom: 8px; display: grid; grid-template-columns: 62px 1fr; align-items: center; }
.export-choice strong { color: var(--teal); font: 700 18px var(--mono); }
.export-choice span { color: var(--muted); }
.toast-region { position: fixed; z-index: 100; right: 18px; bottom: 18px; display: grid; gap: 8px; max-width: min(390px, calc(100vw - 36px)); }
.toast { border: 1px solid var(--ink); background: var(--paper); padding: 12px 14px; box-shadow: var(--shadow); display: grid; grid-template-columns: 1fr auto; gap: 12px; animation: toast-in .25s ease; }
.toast.error { border-color: var(--red); }
.toast strong { font-size: 13px; }
.toast p { margin: 3px 0 0; font-size: 11px; color: var(--muted); }
.toast button { border: 0; background: transparent; font-size: 18px; }
@keyframes toast-in { from { opacity: 0; transform: translateY(8px); } }
.footer { border-top: 1px solid var(--line); display: flex; justify-content: space-between; gap: 20px; padding: 15px clamp(18px,4vw,54px); font: 9px var(--mono); text-transform: uppercase; letter-spacing: .07em; color: var(--muted); }
input[type="range"] { accent-color: var(--teal); width: 100%; }
output { font: 700 10px var(--mono); }
@media (max-width: 1180px) {
  .topbar { grid-template-columns: 1fr auto; }
  .main-nav { order: 3; grid-column: 1/-1; justify-self: center; }
  .library-workspace { grid-template-columns: 1fr 310px; }
  .editor-shell { grid-template-columns: 210px minmax(380px,1fr) 300px; }
  .spec-grid { grid-template-columns: repeat(3,1fr); }
  .spec-grid div:nth-child(3) { border-right: 0; }
  .spec-grid div:nth-child(-n+3) { border-bottom: 1px solid var(--line); }
}
@media (max-width: 900px) {
  .topbar { position: static; }
  .top-actions .button-quiet { display: none; }
  .hero-row, .page-heading { align-items: flex-start; flex-direction: column; }
  .hero-actions { flex-direction: row; width: 100%; }
  .library-workspace, .trace-layout, .contour-layout, .modal-grid { grid-template-columns: 1fr; }
  .compose-panel, .trace-steps { position: static; }
  .trace-steps { display: grid; grid-template-columns: repeat(4,1fr); }
  .trace-step { grid-template-columns: 1fr; text-align: center; border-bottom: 0; border-right: 1px solid var(--line); }
  .trace-step small { display: none; }
  .dual-canvas { grid-template-columns: 1fr; }
  .editor-shell { grid-template-columns: 1fr; }
  .tool-palette, .settings-panel { border: 0; }
  .tool-palette { max-height: 280px; }
  .palette-list { display: flex; overflow-x: auto; max-height: none; }
  .palette-item { min-width: 210px; }
  .settings-content { max-height: none; }
  .editor-canvas { min-height: 520px; }
  .help-grid { grid-template-columns: 1fr; }
}
@media (max-width: 620px) {
  .view { padding-left: 12px; padding-right: 12px; }
  .topbar { padding: 10px 12px; gap: 10px; }
  .brand strong { font-size: 16px; }
  .top-actions { gap: 5px; }
  .top-actions .button { padding: 9px 10px; }
  .main-nav { width: 100%; }
  .main-nav a { flex: 1; text-align: center; padding: 9px 5px; }
  .hero-row h1 { font-size: 43px; }
  .hero-actions { flex-direction: column; }
  .privacy-strip { align-items: flex-start; flex-wrap: wrap; }
  .privacy-strip .text-button { margin-left: 20px; }
  .library-toolbar { width: 100%; flex-direction: column; }
  .panel-heading { flex-direction: column; }
  .search-field input { min-width: 0; width: 100%; }
  .tool-grid { grid-template-columns: 1fr; }
  .field-grid.three, .field-grid.two { grid-template-columns: 1fr; }
  .trace-steps { grid-template-columns: repeat(2,1fr); }
  .trace-main { padding: 10px; }
  .segmentation-controls { align-items: stretch; }
  .editor-heading { align-items: flex-start; flex-direction: column; }
  .title-edit { display: grid; }
  .title-edit input { width: 90vw; }
  .editor-heading .heading-actions { width: 100%; }
  .editor-heading .heading-actions .button { flex: 1; }
  .editor-statusbar { align-items: flex-start; flex-direction: column; }
  .choice-grid.three { grid-template-columns: 1fr; }
  .spec-grid { grid-template-columns: repeat(2,1fr); }
  .spec-grid div:nth-child(2n) { border-right: 0; }
  .spec-grid div:nth-child(3) { border-right: 1px solid var(--line); }
  .spec-grid div:nth-child(-n+4) { border-bottom: 1px solid var(--line); }
  .footer { flex-direction: column; gap: 4px; }
}
.context-menu { position: fixed; z-index: 80; width: 155px; border: 1px solid var(--ink); background: var(--paper); box-shadow: var(--shadow); padding: 5px; }
.context-menu button { width: 100%; border: 0; background: transparent; text-align: left; padding: 9px 10px; font: 700 10px var(--mono); text-transform: uppercase; }
.context-menu button:hover { background: var(--ink); color: var(--paper); }
.context-menu button.danger { color: var(--red); }