:root {
  color-scheme: light;
  --bg: #eaf2f6;
  --cell: #f8fbfd;
  --line: rgba(67, 96, 112, .28);
  --line-soft: rgba(67, 96, 112, .16);
  --text: #183243;
  --muted: #667b88;
  --accent: #148fc0;
  --accent-soft: rgba(20, 143, 192, .14);
  --grid: rgba(44, 83, 105, .075);
  --axis-x: #e7565f;
  --axis-y: #2479d5;
  --axis-z: #59a84f;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  width: 100vw;
  height: 100vh;
  overflow: hidden;
  font-family: "Segoe UI", "Microsoft JhengHei", Arial, sans-serif;
  color: var(--text);
  background:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px),
    linear-gradient(135deg, #f8fbfd 0%, var(--bg) 100%);
  background-size: 28px 28px, 28px 28px, auto;
}

button,
input {
  font: inherit;
}

.cad-layout {
  width: 100vw;
  height: 100vh;
  display: grid;
  grid-template-columns: 25vw 75vw;
  grid-template-rows: 73.5vh 26.5vh;
}

.left-column {
  min-width: 0;
  min-height: 0;
  display: grid;
  grid-template-rows: 59.6fr 40.4fr;
}

.model-cell {
  grid-column: 2;
  grid-row: 1;
}

.bottom-row {
  grid-column: 1 / -1;
  grid-row: 2;
  min-width: 0;
  min-height: 0;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}

.cad-cell {
  min-width: 0;
  min-height: 0;
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  background:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px),
    linear-gradient(180deg, rgba(255, 255, 255, .88) 0%, var(--cell) 100%);
  background-size: 24px 24px, 24px 24px, auto;
}

.dimension-cell {
  display: grid;
  align-content: start;
  justify-items: center;
  gap: 12px;
  padding: 16px 18px 20px;
  background:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px),
    linear-gradient(180deg, #fafdff 0%, #e8f3f8 100%);
  background-size: 24px 24px, 24px 24px, auto;
}

.source-notice {
  width: min(100%, 430px);
  border: 1px solid rgba(214, 55, 55, .46);
  border-left: 5px solid #d63737;
  border-radius: 6px;
  padding: 8px 10px;
  color: #b71f1f;
  background: rgba(255, 241, 241, .86);
  font-size: clamp(10px, .7vw, 13px);
  font-weight: 700;
  line-height: 1.45;
  text-align: left;
  box-shadow: 0 8px 20px rgba(179, 55, 55, .08);
}

.dimension-title {
  margin-top: clamp(8px, 2.4vh, 24px);
  text-align: center;
}

h1,
h2,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 4px;
  font-size: clamp(24px, 2.25vw, 34px);
  line-height: 1.12;
  letter-spacing: 0;
}

.dimension-title p {
  margin-bottom: 0;
  color: #38576a;
  font-size: clamp(18px, 1.75vw, 26px);
  font-weight: 700;
}

.dimension-form {
  width: min(100%, 440px);
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
}

.dimension-form label {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  align-items: center;
  gap: 6px;
}

.dimension-form span {
  font-size: clamp(22px, 2vw, 31px);
  font-weight: 800;
  line-height: 1;
}

.axis-x span {
  color: var(--axis-x);
}

.axis-y span {
  color: var(--axis-y);
}

.axis-z span {
  color: var(--axis-z);
}

.dimension-form input {
  width: 100%;
  height: 39px;
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 0 6px;
  color: var(--text);
  background: rgba(255, 255, 255, .86);
  outline: none;
  text-align: center;
}

.axis-x input {
  border-color: color-mix(in srgb, var(--axis-x) 58%, var(--line));
}

.axis-y input {
  border-color: color-mix(in srgb, var(--axis-y) 58%, var(--line));
}

.axis-z input {
  border-color: color-mix(in srgb, var(--axis-z) 58%, var(--line));
}

.dimension-form input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.view-cell {
  padding: 16px 16px 16px 42px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, .9) 0%, var(--cell) 100%);
}

.view-title {
  position: absolute;
  left: 6px;
  top: 50%;
  z-index: 2;
  margin-bottom: 0;
  color: #1f3a4c;
  font-size: clamp(14px, 1.2vw, 18px);
  line-height: 1.08;
  text-align: right;
  writing-mode: vertical-rl;
  text-orientation: upright;
  transform: translateY(-50%);
}

.top-view {
  background:
    linear-gradient(180deg, #f7fbfd 0%, #eaf4f8 100%);
  background-size: auto;
}

.empty-frame {
  position: absolute;
  inset: 18px 18px 18px 42px;
  border: 1px dashed var(--line-soft);
  pointer-events: none;
  display: grid;
  place-items: center;
}

.projection-svg {
  width: 100%;
  height: 100%;
  display: block;
  background:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px),
    rgba(255, 255, 255, .62);
  background-size: 22px 22px, 22px 22px, auto;
}

.projection-shape {
  fill: none;
  stroke: #e9f7fb;
  stroke-width: 2.4;
  vector-effect: non-scaling-stroke;
}

.projection-cell {
  fill: rgba(95, 199, 242, .22);
  stroke: rgba(235, 250, 255, .82);
  stroke-width: 1.1;
  vector-effect: non-scaling-stroke;
}

.projection-visible-line,
.projection-detail-line,
.projection-hidden-line {
  fill: none;
  vector-effect: non-scaling-stroke;
  stroke-linecap: butt;
  stroke-linejoin: miter;
}

.projection-visible-line {
  stroke: #1f3a4a;
  stroke-width: 2.8;
}

.projection-detail-line {
  stroke: #1f3a4a;
  stroke-width: 2.8;
}

.projection-hidden-line {
  stroke: rgba(89, 120, 135, .72);
  stroke-width: 1.35;
  stroke-dasharray: 7 5;
}

.projection-centerline {
  stroke: rgba(75, 105, 119, .4);
  stroke-width: 1.2;
  stroke-dasharray: 8 7;
  vector-effect: non-scaling-stroke;
}

.projection-dimension {
  fill: var(--muted);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0;
}

.projection-axis-x {
  fill: var(--axis-x);
}

.projection-axis-y {
  fill: var(--axis-y);
}

.projection-axis-z {
  fill: var(--axis-z);
}

.model-cell {
  background:
    radial-gradient(circle at 48% 44%, rgba(32, 157, 196, .16), transparent 38%),
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px),
    linear-gradient(180deg, #f6fbfd 0%, #e8f3f7 100%);
  background-size: auto, 26px 26px, 26px 26px, auto;
}

.three-viewport {
  width: 100%;
  height: 100%;
  transform: none;
  transform-origin: left center;
}

.model-label {
  position: absolute;
  left: 18px;
  top: 16px;
  z-index: 2;
  pointer-events: none;
  text-align: left;
  text-shadow: 0 10px 22px rgba(255, 255, 255, .72);
}

.model-label p {
  margin-bottom: 4px;
  color: var(--accent);
  font-size: 11px;
  text-transform: uppercase;
}

.model-label h2 {
  margin-bottom: 0;
  font-size: clamp(20px, 2.2vw, 31px);
  line-height: 1.08;
  letter-spacing: 0;
}

.model-toolbar {
  position: absolute;
  top: 14px;
  right: 14px;
  z-index: 3;
  display: flex;
  align-items: center;
  gap: 10px;
}

#dimensionReadout,
.hint,
#sculptureStatus {
  color: var(--muted);
  font-size: 13px;
}

#dimensionReadout,
#sculptureStatus {
  padding: 7px 10px;
  border: 1px solid var(--line-soft);
  border-radius: 4px;
  background: rgba(255, 255, 255, .76);
  box-shadow: 0 8px 22px rgba(72, 103, 121, .09);
}

.model-action-button {
  min-height: 34px;
  border: 1px solid rgba(95, 199, 242, .42);
  border-radius: 4px;
  padding: 0 12px;
  color: var(--text);
  background: rgba(255, 255, 255, .78);
  cursor: pointer;
}

.model-action-button:hover,
.model-action-button:focus-visible {
  border-color: var(--accent);
  background: #f5fbff;
  outline: none;
}

.orientation-panel {
  position: absolute;
  right: 14px;
  bottom: 14px;
  z-index: 3;
  width: 232px;
  padding: 10px;
  border: 1px solid rgba(46, 125, 224, .22);
  border-radius: 8px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, .56), rgba(211, 235, 249, .68)),
    rgba(231, 242, 250, .74);
  box-shadow:
    0 18px 38px rgba(36, 76, 112, .18),
    inset 0 1px 0 rgba(255, 255, 255, .64);
  backdrop-filter: blur(11px);
  color: #24445a;
  pointer-events: auto;
}

.hint {
  margin: 0 0 4px;
  padding: 5px 9px;
  border: 1px solid rgba(36, 124, 170, .28);
  border-radius: 999px;
  background: rgba(240, 249, 255, .72);
  color: #285977;
  font-size: 12px;
  line-height: 1.2;
  text-align: center;
  white-space: nowrap;
  backdrop-filter: blur(8px);
}

#orientationCube {
  display: block;
  width: 212px;
  height: 168px;
  margin: -2px 0 2px;
  cursor: pointer;
  touch-action: none;
}

.view-buttons {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 6px;
  margin-top: 4px;
}

.view-buttons .top {
  grid-column: 2;
}

.view-buttons .left {
  grid-column: 1;
}

.view-buttons .front {
  grid-column: 2;
}

.view-buttons .right {
  grid-column: 3;
}

.view-buttons .back {
  grid-column: 1;
}

.view-buttons .bottom {
  grid-column: 2;
}

.view-buttons button,
.display-toggles button {
  min-height: 36px;
  border: 1px solid rgba(45, 113, 157, .26);
  border-radius: 6px;
  background: rgba(249, 253, 255, .78);
  color: #20384f;
  cursor: pointer;
  transition:
    background .18s ease,
    transform .18s ease,
    border-color .18s ease;
}

.view-buttons button:hover,
.view-buttons button:focus-visible,
.display-toggles button:hover,
.display-toggles button:focus-visible {
  border-color: #13b9d6;
  background: #ffffff;
  box-shadow: 0 0 0 2px rgba(19, 185, 214, .12);
  transform: translateY(-1px);
  outline: none;
}

.view-buttons button.active,
.view-buttons button[aria-pressed="true"],
.display-toggles button.active,
.display-toggles button[aria-pressed="true"] {
  border-color: #159fc0;
  background:
    linear-gradient(135deg, rgba(19, 185, 214, .25), rgba(40, 197, 154, .18)),
    #d5f2ff;
  color: #123448;
  box-shadow:
    inset 0 2px 5px rgba(35, 73, 99, .18),
    0 0 0 1px rgba(19, 185, 214, .16),
    0 0 18px rgba(19, 185, 214, .18);
  font-weight: 800;
  transform: translateY(1px);
}

.display-toggles {
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
  margin-top: 6px;
  padding-top: 6px;
  border-top: 1px solid rgba(45, 113, 157, .22);
}

#toggleTransparent.active {
  border-color: #159fc0;
  background:
    linear-gradient(135deg, rgba(19, 185, 214, .22), rgba(46, 125, 224, .14)),
    #d8f1fb;
  color: #123448;
  font-weight: 700;
}

@media (max-width: 980px) {
  .cad-layout {
    grid-template-columns: 28vw 72vw;
  }

  .dimension-cell {
    padding: 14px;
  }

  .dimension-form {
    width: 100%;
  }

  .model-toolbar {
    align-items: flex-end;
    flex-direction: column;
  }

  .orientation-panel {
    width: 210px;
  }
}

@media (max-width: 760px) {
  body {
    width: 100%;
    height: auto;
    min-height: 100vh;
    overflow-x: hidden;
    overflow-y: auto;
    background-size: 20px 20px, 20px 20px, auto;
  }

  .cad-layout {
    width: 100%;
    height: auto;
    min-height: 100vh;
    display: grid;
    grid-template-columns: 1fr;
    grid-template-rows: auto;
  }

  .model-cell {
    grid-column: 1;
    grid-row: 1;
    height: 68vh;
    min-height: 520px;
    border-bottom-width: 2px;
  }

  .three-viewport {
    min-height: 100%;
    touch-action: none;
  }

  .model-label {
    left: 12px;
    top: 10px;
  }

  .model-label p {
    margin-bottom: 2px;
    font-size: 10px;
  }

  .model-label h2 {
    font-size: 23px;
  }

  .model-toolbar {
    top: 10px;
    right: 10px;
    max-width: calc(100% - 156px);
    align-items: flex-end;
    gap: 6px;
  }

  #dimensionReadout,
  #sculptureStatus {
    padding: 6px 8px;
    font-size: 12px;
  }

  .model-action-button {
    min-height: 32px;
    padding: 0 10px;
    font-size: 14px;
  }

  .orientation-panel {
    right: 10px;
    bottom: 12px;
    width: 148px;
    padding: 7px;
    border-radius: 7px;
  }

  .hint {
    margin-bottom: 3px;
    padding: 4px 6px;
    font-size: 10px;
    line-height: 1.25;
    white-space: normal;
  }

  #orientationCube {
    width: 134px;
    height: 102px;
    margin: 0;
  }

  .view-buttons {
    gap: 4px;
    margin-top: 4px;
  }

  .view-buttons button,
  .display-toggles button {
    min-height: 32px;
    border-radius: 5px;
    font-size: 14px;
  }

  .display-toggles {
    gap: 5px;
    margin-top: 5px;
    padding-top: 5px;
  }

  .left-column {
    grid-column: 1;
    grid-row: 2;
    display: grid;
    grid-template-columns: 1fr;
    grid-template-rows: auto auto;
  }

  .dimension-cell {
    min-height: 0;
    align-content: start;
    gap: 10px;
    padding: 18px 16px;
  }

  .source-notice {
    width: min(100%, 520px);
    padding: 7px 9px;
    font-size: 11px;
  }

  h1 {
    margin-bottom: 2px;
    font-size: 26px;
  }

  .dimension-title p {
    font-size: 19px;
  }

  .dimension-form {
    width: min(100%, 420px);
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 8px;
  }

  .dimension-form label {
    grid-template-columns: 34px minmax(0, 1fr);
    gap: 5px;
  }

  .dimension-form span {
    font-size: 28px;
  }

  .dimension-form input {
    height: 42px;
    min-width: 0;
    padding: 0 4px;
    font-size: 16px;
  }

  .top-view,
  .bottom-row .cad-cell {
    min-height: 230px;
  }

  .bottom-row {
    grid-column: 1;
    grid-row: 3;
    display: grid;
    grid-template-columns: 1fr;
  }

  .cad-cell {
    background-size: 20px 20px, 20px 20px, auto;
  }

  .view-cell {
    padding: 14px 12px 14px 34px;
  }

  .view-title {
    left: 5px;
    font-size: 15px;
  }

  .empty-frame {
    inset: 16px 12px 16px 34px;
  }

  .projection-svg {
    background-size: 18px 18px, 18px 18px, auto;
  }
}

@media (max-width: 430px) {
  .model-cell {
    height: 72vh;
    min-height: 560px;
  }

  .model-label h2 {
    max-width: 180px;
    font-size: 21px;
  }

  .model-toolbar {
    max-width: 142px;
  }

  .orientation-panel {
    right: 8px;
    bottom: 10px;
    width: 138px;
  }

  #orientationCube {
    width: 124px;
    height: 94px;
  }

  .view-buttons button,
  .display-toggles button {
    min-height: 30px;
    font-size: 13px;
  }

  .dimension-cell {
    padding: 16px 12px;
  }

  .source-notice {
    padding: 6px 8px;
    font-size: 10px;
  }

  h1 {
    font-size: 24px;
  }

  .dimension-title p {
    font-size: 18px;
  }

  .dimension-form {
    gap: 6px;
  }

  .dimension-form label {
    grid-template-columns: 30px minmax(0, 1fr);
  }

  .dimension-form span {
    font-size: 25px;
  }

  .dimension-form input {
    height: 40px;
  }

  .top-view,
  .bottom-row .cad-cell {
    min-height: 220px;
  }
}