@import url('https://fonts.googleapis.com/css2?family=DM+Mono:wght@300;400;500&family=Manrope:wght@400;500;600;700&display=swap');

:root {
  --paper: #eeeadf;
  --paper-deep: #e1dccf;
  --ink: #1e2927;
  --muted: #707b76;
  --line: rgba(30, 41, 39, .19);
  --faint: rgba(30, 41, 39, .075);
  --clay: #c95d43;
  --clay-dark: #97432f;
  --blue: #244b72;
  --acid: #d4db72;
  --mono: "DM Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --sans: "Manrope", system-ui, sans-serif;
}

* { box-sizing: border-box; }

html, body { min-height: 100%; }

body {
  margin: 0;
  background:
    radial-gradient(circle at 19% 12%, rgba(255,255,255,.52), transparent 28rem),
    repeating-linear-gradient(0deg, transparent 0 3px, rgba(36,75,114,.014) 3px 4px),
    var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  min-width: 320px;
}

button, input { font: inherit; }
button { color: inherit; }

.masthead {
  height: 116px;
  display: grid;
  grid-template-columns: minmax(210px, .8fr) minmax(230px, .65fr) minmax(560px, 1.75fr);
  align-items: center;
  border-bottom: 1px solid var(--line);
  padding: 0 32px;
}

.brand {
  display: inline-flex;
  align-items: center;
  width: max-content;
  gap: 15px;
  color: inherit;
  text-decoration: none;
}

.brand-mark {
  width: 48px;
  height: 48px;
  border: 1px solid var(--ink);
  border-radius: 50%;
  display: grid;
  place-content: center;
  gap: 3px;
  transform: rotate(-13deg);
}

.brand-mark i { width: 25px; height: 2px; background: var(--clay); display: block; border-radius: 99px; }
.brand-mark i:nth-child(1) { transform: translateX(4px); width: 18px; }
.brand-mark i:nth-child(3) { width: 14px; }
.brand > span:last-child { display: grid; gap: 3px; }
.brand b { font-size: 23px; letter-spacing: .16em; line-height: 1; }
.brand small { font: 400 9px/1 var(--mono); letter-spacing: .16em; }

.masthead-note {
  margin: 0;
  color: var(--muted);
  font: 400 11px/1.5 var(--mono);
  text-transform: uppercase;
  letter-spacing: .06em;
}

.measure-controls {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
  justify-self: stretch;
}

.measure-controls label { display: grid; grid-template-columns: 1fr auto; gap: 9px 16px; }
.measure-controls span, .measure-controls output { font: 500 10px/1 var(--mono); text-transform: uppercase; letter-spacing: .09em; }
.measure-controls output { color: var(--clay-dark); }
input[type="range"] { grid-column: 1 / -1; width: 100%; min-width: 0; accent-color: var(--clay); }

.machine {
  min-height: calc(100vh - 224px);
  display: grid;
  grid-template-columns: minmax(420px, 1fr) minmax(480px, 1fr);
}

.chamber { min-width: 0; display: grid; grid-template-rows: 92px minmax(400px, 1fr) auto; }
.chamber-preview { border-right: 1px solid var(--line); grid-template-rows: 92px minmax(400px, 1fr) auto auto; }

.chamber-head {
  border-bottom: 1px solid var(--line);
  padding: 20px 28px 18px;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
}

.step {
  display: block;
  color: var(--clay-dark);
  font: 500 9px/1 var(--mono);
  letter-spacing: .15em;
  margin-bottom: 9px;
}

.chamber-head h1, .chamber-head h2 { font-size: 19px; font-weight: 500; letter-spacing: -.02em; line-height: 1; margin: 0; }
.status-dot { font: 500 9px/1 var(--mono); letter-spacing: .12em; display: flex; align-items: center; gap: 8px; }
.status-dot i { width: 6px; height: 6px; border-radius: 50%; background: var(--acid); box-shadow: 0 0 0 4px rgba(212,219,114,.22); }
.preview-head-actions { display: grid; justify-items: end; gap: 10px; }
.body-presets { display: flex; gap: 4px; }
.body-presets button {
  appearance: none;
  border: 1px solid var(--line);
  background: transparent;
  padding: 5px 7px;
  font: 500 7px/1 var(--mono);
  text-transform: uppercase;
  letter-spacing: .08em;
  cursor: pointer;
}
.body-presets button.active { background: var(--acid); border-color: var(--ink); }

.history-actions { display: flex; gap: 8px; }
.history-actions button, .presets button {
  appearance: none;
  border: 1px solid var(--line);
  background: rgba(255,255,255,.18);
  padding: 8px 11px;
  font: 500 9px/1 var(--mono);
  text-transform: uppercase;
  letter-spacing: .08em;
  cursor: pointer;
}
.history-actions button:hover, .presets button:hover { border-color: var(--clay); color: var(--clay-dark); }
.history-actions button:disabled { opacity: .35; cursor: default; }

.preview-wrap {
  position: relative;
  min-height: 400px;
  overflow: hidden;
  background:
    linear-gradient(var(--faint) 1px, transparent 1px),
    linear-gradient(90deg, var(--faint) 1px, transparent 1px);
  background-size: 40px 40px;
  cursor: grab;
  touch-action: none;
}
.preview-wrap:active { cursor: grabbing; }
#preview { width: 100%; height: 100%; display: block; }
.axis-label { position: absolute; font: 400 8px/1 var(--mono); letter-spacing: .18em; color: var(--muted); pointer-events: none; }
.axis-label-y { top: 50%; left: 14px; transform: rotate(-90deg) translateX(-50%); transform-origin: left top; }
.axis-label-x { bottom: 15px; left: 50%; transform: translateX(-50%); }
.preview-hint { position: absolute; top: 18px; left: 20px; display: flex; gap: 8px; color: var(--muted); font: 400 9px/1 var(--mono); text-transform: uppercase; letter-spacing: .08em; }
.preview-hint span { color: var(--clay); }
.clay-chip { position: absolute; top: 17px; right: 20px; display: flex; align-items: center; gap: 8px; font: 400 8px/1 var(--mono); letter-spacing: .08em; }
.clay-chip i { display: block; width: 18px; height: 18px; border-radius: 50%; background: var(--clay); border: 1px solid var(--clay-dark); box-shadow: inset -3px -4px 5px rgba(95,34,23,.22); }

.mesh-readout { min-height: 78px; border-top: 1px solid var(--line); display: grid; grid-template-columns: repeat(4, 1fr); }
.mesh-readout > div { display: grid; grid-template-columns: auto 1fr; align-items: baseline; align-content: center; padding: 12px 18px; border-right: 1px solid var(--line); }
.mesh-readout > div:last-child { border-right: 0; }
.mesh-readout span { font: 500 9px/1 var(--mono); color: var(--clay-dark); margin-right: 10px; }
.mesh-readout strong { font: 400 21px/1 var(--mono); letter-spacing: -.07em; }
.mesh-readout small { grid-column: 2; color: var(--muted); font: 400 8px/1 var(--mono); margin-top: 5px; }

.body-controls { min-height: 76px; border-top: 1px solid var(--line); display: grid; grid-template-columns: 1fr 1fr; }
.body-controls label { min-width: 0; display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 8px 10px; align-content: center; padding: 11px 18px; border-right: 1px solid var(--line); }
.body-controls label:last-child { border-right: 0; }
.body-controls span, .body-controls output { font: 500 9px/1 var(--mono); text-transform: uppercase; letter-spacing: .08em; }
.body-controls output { color: var(--clay-dark); }
.body-controls input, .body-controls small { grid-column: 1 / -1; }
.body-controls small { color: var(--muted); font: 400 8px/1 var(--mono); letter-spacing: .05em; text-transform: uppercase; }

.draw-wrap { position: relative; min-height: 400px; overflow: hidden; touch-action: none; }
#editor { display: block; width: 100%; height: 100%; min-height: 400px; color: rgba(36,75,114,.12); }
.editor-paper { fill: rgba(255,255,255,.16); }
.editor-grid { opacity: .75; }
.ruler path { stroke: var(--blue); stroke-width: 1; opacity: .55; fill: none; }
.ruler text { font: 400 9px var(--mono); fill: var(--blue); opacity: .68; text-anchor: end; }
.rib-fill { fill: url(#rib-wash); stroke: none; }
.spine-line { fill: none; stroke: var(--ink); stroke-width: 2; stroke-dasharray: 3 4; opacity: .75; }
.base-edge-line { fill: none; stroke: var(--blue); stroke-width: 1.2; stroke-dasharray: 5 6; opacity: .42; }
.base-edge-label { font: 500 8px var(--mono); fill: var(--blue); letter-spacing: .13em; text-anchor: middle; opacity: .52; transform: rotate(-90deg); transform-origin: 648px 360px; }
.midpoint-label { fill: var(--blue); font: 500 8px var(--mono); letter-spacing: .12em; text-anchor: middle; opacity: .62; }
.raw-line { fill: none; stroke: var(--clay); stroke-width: 1.5; stroke-dasharray: 2 5; opacity: .38; }
.edge-line { fill: none; stroke: var(--clay-dark); stroke-width: 4; stroke-linecap: round; stroke-linejoin: round; }
.fit-guides { pointer-events: none; }
.fit-guides .fit-radius { fill: none; stroke: var(--blue); stroke-width: 1; stroke-dasharray: 3 5; opacity: .34; }
.fit-guides .fit-center { fill: var(--paper); stroke: var(--blue); stroke-width: 1.2; opacity: .8; }
.fit-guides .fit-node { fill: var(--acid); stroke: var(--ink); stroke-width: 1; }
.fit-guides .fit-fillet { fill: none; stroke: var(--acid); stroke-width: 7; stroke-linecap: round; opacity: .72; }
.fit-guides text { fill: var(--blue); font: 500 8px var(--mono); letter-spacing: .06em; paint-order: stroke; stroke: var(--paper); stroke-width: 4px; stroke-linejoin: round; }
.anchor circle:first-child { fill: var(--paper); stroke: var(--clay-dark); stroke-width: 1.5; }
.anchor circle:last-child { fill: var(--clay); }
.draw-instruction path { fill: none; stroke: var(--blue); stroke-width: 1.2; stroke-dasharray: 5 7; opacity: .45; }
.draw-instruction text { font: 500 10px var(--mono); fill: var(--blue); letter-spacing: .16em; opacity: .7; }
.draw-capture { fill: transparent; cursor: crosshair; }
.draw-cursor { width: 18px; height: 18px; border: 1px solid var(--clay-dark); border-radius: 50%; position: absolute; transform: translate(-50%,-50%); pointer-events: none; display: none; }

.draw-tools { min-height: 98px; border-top: 1px solid var(--line); display: grid; grid-template-columns: minmax(510px, 1.45fr) minmax(0, .55fr); }
.fit-controls { min-width: 0; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); border-right: 1px solid var(--line); }
.smooth-control { min-width: 0; overflow: hidden; display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 9px 10px; align-content: center; padding: 12px 18px; border-right: 1px solid var(--line); }
.smooth-control:last-child { border-right: 0; }
.smooth-control span, .smooth-control output, .presets > span { font: 500 9px/1 var(--mono); text-transform: uppercase; letter-spacing: .08em; }
.smooth-control output { color: var(--clay-dark); }
.smooth-control input { grid-column: 1 / -1; accent-color: var(--clay); width: 100%; }
.smooth-control small { grid-column: 1 / -1; color: var(--muted); font: 400 8px/1 var(--mono); letter-spacing: .06em; text-transform: uppercase; }
.presets { display: flex; align-items: center; justify-content: flex-end; gap: 7px; padding: 12px 20px; overflow-x: auto; }
.presets > span { color: var(--muted); margin-right: 4px; }

.export-dock {
  min-height: 108px;
  border-top: 1px solid var(--ink);
  display: grid;
  grid-template-columns: minmax(300px, 1fr) minmax(300px, .8fr) minmax(410px, 1.1fr);
  background: var(--ink);
  color: var(--paper);
}

.mesh-state, .print-note { border-right: 1px solid rgba(238,234,223,.18); }
.mesh-state { display: flex; align-items: center; gap: 16px; padding: 20px 32px; }
.mesh-seal { width: 36px; height: 36px; display: grid; place-items: center; border-radius: 50%; background: var(--acid); color: var(--ink); font: 600 16px/1 var(--sans); }
.mesh-state p { margin: 0; display: grid; gap: 7px; }
.mesh-state b { font: 500 10px/1 var(--mono); letter-spacing: .14em; }
.mesh-state span:last-child { color: rgba(238,234,223,.62); font: 400 9px/1 var(--mono); }
.print-note { margin: 0; display: flex; flex-direction: column; justify-content: center; padding: 20px 30px; font: 400 9px/1.55 var(--mono); color: rgba(238,234,223,.68); }
.print-note span { color: var(--acid); letter-spacing: .14em; margin-bottom: 4px; }
.exports { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; align-items: center; padding: 16px 20px; }
.exports button { height: 64px; border: 1px solid rgba(238,234,223,.32); background: transparent; color: var(--paper); display: grid; grid-template-columns: 1fr auto; grid-template-rows: 1fr 1fr; text-align: left; align-items: end; padding: 11px 14px; cursor: pointer; }
.exports button:hover { border-color: var(--paper); }
.exports button:disabled { opacity: .32; cursor: not-allowed; }
.exports button span { font: 400 8px/1 var(--mono); color: rgba(238,234,223,.58); }
.exports button b { grid-row: 2; font: 500 15px/1 var(--mono); letter-spacing: .08em; }
.exports button i { grid-column: 2; grid-row: 1 / 3; align-self: center; font-style: normal; font-size: 20px; }
.exports button.primary { background: var(--clay); border-color: var(--clay); }
.exports button.primary span { color: rgba(255,255,255,.7); }

.toast { position: fixed; z-index: 4; left: 50%; bottom: 126px; transform: translate(-50%, 12px); opacity: 0; background: var(--acid); color: var(--ink); padding: 11px 15px; font: 500 9px/1 var(--mono); letter-spacing: .08em; pointer-events: none; transition: .22s ease; }
.toast.show { opacity: 1; transform: translate(-50%, 0); }

@media (max-width: 1400px) {
  .draw-tools { grid-template-columns: 1fr; }
  .fit-controls { border-right: 0; border-bottom: 1px solid var(--line); }
  .presets > span { display: none; }
  .presets { min-height: 48px; justify-content: flex-start; gap: 4px; padding: 9px 12px; }
  .presets button { padding: 8px 5px; }
}

@media (max-width: 1000px) {
  .masthead { grid-template-columns: 1fr 1.5fr; height: auto; min-height: 108px; }
  .masthead-note { display: none; }
  .measure-controls { grid-template-columns: repeat(2, minmax(0, 1fr)); padding: 18px 0; }
  .machine { grid-template-columns: 1fr; }
  .chamber-preview { border-right: 0; border-bottom: 1px solid var(--ink); }
  .preview-wrap, .draw-wrap { height: min(68vw, 620px); }
  .export-dock { grid-template-columns: 1fr 1fr; }
  .print-note { display: none; }
}

@media (max-width: 650px) {
  .masthead { padding: 18px; grid-template-columns: 1fr; gap: 20px; }
  .measure-controls { grid-template-columns: 1fr; gap: 20px; }
  .machine { display: block; }
  .chamber { grid-template-rows: auto auto auto; }
  .chamber-head { min-height: 88px; padding: 18px; }
  .preview-wrap, .draw-wrap { height: 520px; }
  .mesh-readout > div { padding: 10px; }
  .mesh-readout strong { font-size: 17px; }
  .draw-tools { grid-template-columns: 1fr; }
  .fit-controls { grid-template-columns: 1fr; border-right: 0; border-bottom: 1px solid var(--line); }
  .smooth-control { border-right: 0; border-bottom: 1px solid var(--line); }
  .smooth-control:last-child { border-bottom: 0; }
  .presets { justify-content: flex-start; overflow-x: auto; }
  .presets > span { display: none; }
  .export-dock { grid-template-columns: 1fr; }
  .mesh-state { display: none; }
  .exports { padding: 12px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; }
}