:root {
  --bg: #f4f7fb;
  --panel: #ffffff;
  --ink: #182033;
  --muted: #687386;
  --line: #dde5ef;
  --accent: #1769e0;
  --accent-strong: #0f4db7;
  --warm: #ff6b4a;
  --shadow: 0 18px 45px rgba(28, 43, 68, 0.09);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--ink);
  background: var(--bg);
}

a { color: inherit; text-decoration: none; }

.shell {
  display: grid;
  grid-template-columns: 260px 1fr;
  min-height: 100vh;
}

.sidebar {
  position: sticky;
  top: 0;
  height: 100vh;
  padding: 28px 20px;
  background: #ffffff;
  border-right: 1px solid var(--line);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 34px;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 8px;
  background: var(--ink);
  color: #fff;
  font-weight: 800;
}

.brand small {
  display: block;
  color: var(--muted);
  margin-top: 2px;
}

nav {
  display: grid;
  gap: 8px;
}

nav a {
  padding: 11px 12px;
  border-radius: 8px;
  color: #354057;
}

nav a:hover {
  background: #edf4ff;
  color: var(--accent-strong);
}

.nav-logout {
  margin: 8px 0 0;
}

.nav-logout button {
  width: 100%;
  padding: 11px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: #354057;
  cursor: pointer;
  font: inherit;
  text-align: left;
}

.nav-logout button:hover {
  background: #fff1f1;
  color: #9f1b1b;
}

.auth-card {
  max-width: 460px;
  margin: 0 auto;
  padding: 28px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.auth-form {
  display: grid;
  gap: 14px;
}

.notice.danger {
  border-color: #ffd5d5;
  background: #fff1f1;
  color: #9f1b1b;
}

.content {
  padding: 34px;
  max-width: 1480px;
  width: 100%;
}

.hero {
  display: grid;
  grid-template-columns: minmax(320px, 0.95fr) minmax(360px, 1.05fr);
  gap: 28px;
  align-items: stretch;
  margin-bottom: 28px;
}

.hero > div:first-child,
.hero-panel,
.upload-box,
.editor-pane,
.empty-state,
.notice {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.hero > div:first-child {
  padding: 48px;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--accent);
  font-weight: 750;
  text-transform: uppercase;
  font-size: 0.78rem;
  letter-spacing: 0;
}

h1 {
  margin: 0;
  font-size: 3rem;
  line-height: 1.04;
  letter-spacing: 0;
}

h2, h3 { letter-spacing: 0; }

.lead {
  max-width: 720px;
  margin: 18px 0 28px;
  color: var(--muted);
  font-size: 1.08rem;
  line-height: 1.65;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 0 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: var(--ink);
  font-weight: 700;
  cursor: pointer;
  white-space: nowrap;
}

.button.primary {
  border-color: var(--accent);
  background: var(--accent);
  color: #fff;
}

.button.primary:hover { background: var(--accent-strong); }
.button.ghost { color: var(--muted); cursor: not-allowed; }
.button.small { min-height: 34px; padding: 0 12px; font-size: 0.9rem; }
.button.is-loading,
.button:disabled.is-loading {
  position: relative;
  opacity: 0.82;
  cursor: wait;
}

.button.is-loading::before {
  content: "";
  width: 13px;
  height: 13px;
  margin-right: 8px;
  border: 2px solid currentColor;
  border-right-color: transparent;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

.process-status {
  margin-top: 10px;
  color: var(--accent-strong);
  font-size: 0.92rem;
  font-weight: 700;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.hero-panel {
  display: grid;
  place-items: center;
  overflow: hidden;
  min-height: 480px;
  background: linear-gradient(135deg, #eef6ff 0%, #ffffff 58%, #fff0eb 100%);
}

.mini-pattern {
  width: min(72%, 420px);
  aspect-ratio: 5 / 6;
}

.mini-pattern svg {
  width: 100%;
  height: 100%;
  filter: drop-shadow(0 18px 28px rgba(20, 33, 61, 0.14));
}

.mini-pattern path {
  fill: rgba(255,255,255,0.72);
  stroke: #14213d;
  stroke-width: 4;
}

.mini-pattern circle { fill: var(--warm); stroke: #fff; stroke-width: 3; }

.steps {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  margin: 26px 0;
}

.steps article,
.stats-row > div,
.dataset-item,
.correction-row,
.panel-section {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.steps article { padding: 22px; }
.steps span { color: var(--warm); font-weight: 800; }
.steps h2 { font-size: 1.05rem; margin: 14px 0 8px; }
.steps p, .page-head p, .dataset-item p, .correction-row p, .empty-state p { color: var(--muted); line-height: 1.5; }

.stats-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin: 22px 0;
}

.stats-row > div { padding: 20px; }
.stats-row strong { display: block; font-size: 2rem; }
.stats-row span { color: var(--muted); }

.page-head {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  align-items: flex-end;
  margin-bottom: 22px;
}

.page-head.compact h1 { font-size: 2.2rem; }
.actions, .row-actions { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }

.upload-box {
  max-width: 680px;
  padding: 28px;
  display: grid;
  gap: 20px;
}

.upload-box label span {
  display: block;
  font-weight: 750;
  margin-bottom: 10px;
}

input[type="file"] {
  width: 100%;
  padding: 14px;
  border: 1px dashed #9fb3cc;
  border-radius: 8px;
  background: #f8fbff;
}

input[type="text"],
input[type="number"],
select {
  width: 100%;
  min-height: 42px;
  padding: 9px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #f8fbff;
  color: var(--ink);
  font: inherit;
}

.template-filters {
  display: grid;
  grid-template-columns: minmax(260px, 1fr) 240px;
  gap: 12px;
  margin-bottom: 18px;
  padding: 16px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.template-filters label span,
.measurement-form label span {
  display: block;
  margin-bottom: 7px;
  color: #354057;
  font-weight: 750;
}

.template-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
}

.template-card,
.template-detail-preview,
.template-detail-panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.template-card {
  overflow: hidden;
  display: grid;
  grid-template-rows: 220px 1fr;
}

.template-preview {
  display: grid;
  place-items: center;
  padding: 12px;
  background: #f8fbff;
  border-bottom: 1px solid var(--line);
}

.template-preview img,
.template-detail-preview img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.template-card-body {
  display: grid;
  gap: 14px;
  padding: 18px;
}

.template-card h2 {
  margin: 0 0 8px;
  font-size: 1.25rem;
}

.template-card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.5;
}

.template-meta {
  display: grid;
  gap: 8px;
  margin: 0;
}

.template-meta div {
  display: grid;
  grid-template-columns: 92px 1fr;
  gap: 10px;
}

.template-meta dt {
  color: var(--muted);
  font-weight: 800;
}

.template-meta dd {
  margin: 0;
}

.template-detail {
  display: grid;
  grid-template-columns: minmax(360px, 0.9fr) minmax(420px, 1.1fr);
  gap: 18px;
  align-items: start;
}

.template-detail-preview {
  height: calc(100vh - 120px);
  min-height: 560px;
  padding: 18px;
  background: #f8fbff;
}

.template-detail-panel {
  padding: 28px;
}

.measurement-form {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 22px;
}

.measurement-form .button {
  grid-column: 1 / -1;
}

button:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.editor-grid {
  display: grid;
  grid-template-columns: minmax(300px, 0.75fr) minmax(520px, 1.25fr);
  gap: 18px;
  align-items: start;
}

.editor-pane {
  padding: 14px;
  overflow: hidden;
}

.pane-title {
  font-weight: 800;
  margin: 2px 0 12px;
}

.source-photo {
  display: block;
  width: 100%;
  max-height: 78vh;
  object-fit: contain;
  border-radius: 8px;
  background: #eef3f8;
}

.pattern-pane {
  min-height: 70vh;
}

#patternEditor {
  width: 100%;
  overflow: auto;
  background: #f8fbff;
  border-radius: 8px;
  border: 1px solid var(--line);
}

#patternEditor svg {
  display: block;
  width: 100%;
  height: auto;
  min-width: 520px;
}

.point.dragging { fill: #1769e0; }

.table-list {
  display: grid;
  gap: 12px;
}

.import-layout {
  display: grid;
  grid-template-columns: minmax(320px, 1fr) minmax(320px, 1fr);
  gap: 16px;
  margin-bottom: 20px;
}

.import-card,
.import-example,
.imported-card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.import-card {
  padding: 20px;
  display: grid;
  gap: 14px;
}

.import-card h2 {
  margin: 0;
}

.import-card label span {
  display: block;
  margin-bottom: 8px;
  font-weight: 750;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 140px;
  gap: 12px;
}

.train-form {
  display: grid;
  grid-template-columns: minmax(180px, 1fr) 120px 140px minmax(260px, 1.2fr) auto;
  gap: 12px;
  align-items: end;
}

.train-form label span {
  display: block;
  margin-bottom: 8px;
  font-weight: 750;
}

.category-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}

.category-pills span {
  padding: 7px 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #f8fbff;
  color: var(--muted);
  font-weight: 700;
}

.import-example {
  padding: 14px;
}

.import-example h3 {
  margin: 0 0 8px;
}

.import-example p,
.muted-text {
  color: var(--muted);
}

.imported-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 12px;
}

.imported-card {
  display: grid;
  grid-template-columns: 82px 1fr;
  gap: 12px;
  padding: 12px;
}

.imported-card img {
  width: 82px;
  height: 82px;
  object-fit: cover;
  border-radius: 8px;
  background: #edf3f8;
}

.imported-card h3,
.imported-card p {
  margin: 0 0 6px;
}

.imported-card p {
  color: var(--muted);
}

.dataset-item {
  display: grid;
  grid-template-columns: 136px 1fr;
  gap: 18px;
  padding: 14px;
}

.dataset-item img {
  width: 136px;
  height: 136px;
  object-fit: cover;
  border-radius: 8px;
  background: #edf3f8;
}

code {
  padding: 2px 5px;
  border-radius: 5px;
  background: #edf3f8;
  color: #25324a;
  word-break: break-word;
}

.empty-state, .notice {
  padding: 26px;
}

.panel-section {
  padding: 18px;
  margin-top: 18px;
}

.panel-section > h2 { margin-top: 0; }

.correction-row {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
  padding: 14px;
}

.correction-row h3, .dataset-item h2 { margin: 0 0 8px; }
.correction-row p, .dataset-item p { margin: 4px 0; }

.toast {
  position: fixed;
  right: 28px;
  bottom: 28px;
  padding: 13px 16px;
  border-radius: 8px;
  background: var(--ink);
  color: #fff;
  box-shadow: var(--shadow);
  z-index: 10;
}

.cad-editor {
  display: grid;
  grid-template-rows: auto 1fr auto;
  min-height: calc(100vh - 68px);
  background: #eef2f6;
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
}

.cad-topbar {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
  padding: 12px 14px;
  background: #fff;
  border-bottom: 1px solid var(--line);
}

.cad-topbar h1 {
  font-size: 1.35rem;
}

.cad-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

#mobileToolsBtn {
  display: none;
}

.icon-button {
  min-width: 42px;
  padding: 0 10px;
  font-size: 1.1rem;
}

.toolbar-field {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 700;
}

.toolbar-field select {
  min-height: 38px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #f8fbff;
  padding: 0 8px;
}

.toggle-control {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: #354057;
  font-size: 0.92rem;
  font-weight: 700;
}

.cad-body {
  display: grid;
  grid-template-columns: 250px minmax(0, 1fr) 310px;
  min-height: 720px;
  transition: grid-template-columns .18s ease;
}

.cad-body.sidebar-collapsed {
  grid-template-columns: 58px minmax(0, 1fr) 310px;
}

.cad-tools {
  display: flex;
  flex-direction: column;
  align-content: start;
  gap: 8px;
  padding: 12px 10px;
  background: #f8fafc;
  border-right: 1px solid var(--line);
  overflow: auto;
  transition: width .18s ease, padding .18s ease;
}

.tool-button {
  min-height: 42px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: #354057;
  cursor: pointer;
  font-size: 0.72rem;
  font-weight: 800;
}

.tool-group {
  display: grid;
  gap: 0;
  min-width: 0;
}

.tool-group-header {
  display: flex;
  align-items: center;
  width: 100%;
  gap: 8px;
  padding: 9px 10px;
  border: 1px solid #dce4ef;
  border-radius: 8px 8px 0 0;
  background: #eef4fb;
  color: #26354a;
  cursor: pointer;
  font: inherit;
  font-size: .86rem;
  font-weight: 850;
  text-align: left;
}

.tool-group-icon {
  width: 16px;
  color: #6a7686;
  font-size: .78rem;
}

.tool-group-body {
  display: grid;
  gap: 8px;
  overflow: hidden;
  max-height: 900px;
  padding: 10px;
  border: 1px solid #dce4ef;
  border-top: 0;
  border-radius: 0 0 8px 8px;
  background: #fff;
  transition: max-height .2s ease, padding .2s ease, opacity .16s ease;
}

.tool-group.collapsed .tool-group-body {
  max-height: 0;
  padding-top: 0;
  padding-bottom: 0;
  opacity: 0;
}

.layer-controls {
  align-items: start;
}

.sidebar-collapse-toggle {
  width: 100%;
  justify-content: center;
}

.editor-sidebar.collapsed {
  align-items: center;
  padding: 10px 6px;
}

.editor-sidebar.collapsed .tool-group,
.editor-sidebar.collapsed .tool-group-body {
  display: none;
}

.editor-sidebar.collapsed .sidebar-collapse-toggle {
  writing-mode: vertical-rl;
  min-width: 42px;
  width: 42px;
  min-height: 128px;
  padding: 10px 6px;
}

.editor-sidebar.collapsed + .editor-workspace {
  min-width: 0;
}

.tool-button.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.cad-workbench {
  position: relative;
  display: grid;
  grid-template-columns: 34px 1fr;
  grid-template-rows: 30px 1fr;
  min-width: 0;
  background: #dfe6ef;
}

.ruler {
  position: relative;
  overflow: hidden;
  background: #f8fafc;
  border-color: var(--line);
  color: #7b8799;
  font-size: 0.68rem;
  user-select: none;
}

.ruler-x {
  grid-column: 2;
  border-bottom: 1px solid var(--line);
}

.ruler-y {
  grid-row: 2;
  border-right: 1px solid var(--line);
}

.ruler span {
  position: absolute;
}

.ruler-x span {
  top: 7px;
  border-left: 1px solid #aab6c5;
  padding-left: 4px;
}

.ruler-y span {
  left: 4px;
  border-top: 1px solid #aab6c5;
  padding-top: 2px;
}

.canvas-scroll {
  grid-column: 2;
  grid-row: 2;
  overflow: auto;
  padding: 38px;
}

.cad-canvas {
  background: #fff;
  box-shadow: 0 18px 38px rgba(28, 43, 68, 0.16);
  transform-origin: top left;
}

.cad-canvas svg {
  display: block;
}

.cad-props {
  display: grid;
  align-content: start;
  gap: 12px;
  padding: 12px;
  background: #f8fafc;
  border-left: 1px solid var(--line);
}

.prop-card {
  display: grid;
  gap: 12px;
  padding: 14px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.prop-card.tool-group {
  padding: 0;
  gap: 0;
}

.prop-card.tool-group .tool-group-header {
  border: 0;
  border-bottom: 1px solid var(--line);
}

.prop-card.tool-group .tool-group-body {
  border: 0;
  border-radius: 0 0 8px 8px;
  padding: 14px;
}

.prop-card h2 {
  margin: 0;
  font-size: 1rem;
}

.prop-card label span {
  display: block;
  margin-bottom: 7px;
  color: #354057;
  font-weight: 750;
}

.compact-photo {
  max-height: 220px;
}

.cad-statusbar {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
  padding: 9px 14px;
  background: #17243a;
  color: #e9eef6;
  font-size: 0.9rem;
  font-weight: 700;
}

.cad-statusbar span {
  white-space: nowrap;
}

.modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: 30;
  display: grid;
  place-items: center;
  padding: 22px;
  background: rgba(24, 32, 51, 0.42);
}

.modal-backdrop[hidden] {
  display: none !important;
}

.grading-panel {
  width: min(780px, 100%);
  max-height: calc(100vh - 44px);
  overflow: auto;
  display: grid;
  gap: 16px;
  padding: 22px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.grading-panel-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
}

.grading-panel-head h2 {
  margin: 0;
}

.grading-controls {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.grading-controls label span {
  display: block;
  margin-bottom: 7px;
  color: #354057;
  font-weight: 750;
}

.grading-size-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
  gap: 8px;
}

.size-toggle {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 9px 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #f8fbff;
  font-weight: 750;
}

.size-swatch {
  width: 20px;
  height: 0;
  border-top: 3px solid var(--accent);
}

.size-xs .size-swatch,
.size-42 .size-swatch { border-style: dashed; border-color: #6f7d95; }
.size-s .size-swatch,
.size-44 .size-swatch { border-color: #2b8a3e; }
.size-m .size-swatch,
.size-46 .size-swatch { border-color: var(--ink); border-width: 4px; }
.size-l .size-swatch,
.size-48 .size-swatch { border-color: var(--warm); }
.size-xl .size-swatch,
.size-50 .size-swatch { border-style: dotted; border-color: #8a3ffc; }

.grading-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.grading-warning {
  padding: 10px 12px;
  border: 1px solid #ffd8a8;
  border-radius: 8px;
  background: #fff4e6;
  color: #8a4b08;
  font-weight: 750;
}

.measurement-summary {
  overflow: auto;
}

.measurement-summary table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
}

.measurement-summary th,
.measurement-summary td {
  padding: 8px 9px;
  border-bottom: 1px solid var(--line);
  text-align: left;
}

.nesting-app {
  display: grid;
  grid-template-rows: auto 1fr auto;
  min-height: calc(100vh - 68px);
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
  background: #eef2f6;
}

.nesting-topbar {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
  padding: 14px;
  background: #fff;
  border-bottom: 1px solid var(--line);
}

.nesting-topbar h1 {
  font-size: 1.5rem;
}

.nesting-layout {
  display: grid;
  grid-template-columns: 270px minmax(0, 1fr) 320px;
  min-height: 720px;
}

.nesting-panel {
  display: grid;
  align-content: start;
  gap: 12px;
  padding: 14px;
  background: #f8fafc;
  border-right: 1px solid var(--line);
}

.nesting-panel:last-child {
  border-right: 0;
  border-left: 1px solid var(--line);
}

.nesting-panel h2 {
  margin: 0;
  font-size: 1rem;
}

.nesting-panel label span,
.angle-list > span {
  display: block;
  margin-bottom: 7px;
  color: #354057;
  font-weight: 750;
}

.angle-list {
  display: grid;
  gap: 7px;
}

.angle-list label {
  display: inline-flex;
  gap: 7px;
  align-items: center;
}

.nesting-workbench {
  min-width: 0;
  background: #dfe6ef;
}

.nesting-canvas-scroll {
  height: 100%;
  max-height: calc(100vh - 178px);
  overflow: auto;
  padding: 32px;
}

.nesting-canvas {
  display: inline-block;
  min-width: 100%;
  background: #fff;
  box-shadow: 0 18px 38px rgba(28, 43, 68, 0.16);
}

.nesting-canvas svg {
  display: block;
}

.nesting-piece-list {
  display: grid;
  gap: 8px;
}

.nesting-piece-row {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 6px 8px;
  align-items: center;
  padding: 9px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.nesting-piece-row.selected {
  border-color: var(--accent);
  background: #eef6ff;
}

.nesting-piece-row span,
.nesting-piece-row strong {
  grid-column: 2;
  color: var(--muted);
  font-size: 0.86rem;
}

.nesting-piece-row strong {
  color: #d9482f;
}

.piece-select {
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--ink);
  text-align: left;
  font: inherit;
  font-weight: 800;
  cursor: pointer;
}

.stitch-map-panel[hidden] {
  display: none;
}

.stitch-list {
  display: grid;
  gap: 8px;
}

.stitch-row {
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.stitch-row h3 {
  margin: 0 0 6px;
  font-size: 0.96rem;
}

.stitch-row p {
  margin: 3px 0;
  color: var(--muted);
  font-size: 0.88rem;
}

.stitch-status-ok { color: #2b8a3e; font-weight: 800; }
.stitch-status-warning { color: #9a6700; font-weight: 800; }
.stitch-status-error { color: #d9482f; font-weight: 800; }
.stitch-status-unknown { color: var(--muted); font-weight: 800; }

.visualization-app {
  display: grid;
  grid-template-rows: auto 1fr;
  min-height: calc(100vh - 68px);
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
  background: #eef2f6;
}

.visualization-topbar {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
  padding: 14px;
  background: #fff;
  border-bottom: 1px solid var(--line);
}

.visualization-topbar h1 {
  font-size: 1.5rem;
}

.visualization-layout {
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr) 300px;
  min-height: 720px;
}

.visualization-panel {
  display: grid;
  align-content: start;
  gap: 12px;
  padding: 14px;
  background: #f8fafc;
  border-right: 1px solid var(--line);
}

.visualization-panel:last-child {
  border-right: 0;
  border-left: 1px solid var(--line);
}

.visualization-panel h2 {
  margin: 0;
  font-size: 1rem;
}

.visualization-panel label span {
  display: block;
  margin-bottom: 7px;
  color: #354057;
  font-weight: 750;
}

.visualization-workbench {
  display: grid;
  grid-template-rows: auto 1fr;
  gap: 12px;
  min-width: 0;
  padding: 18px;
  background: #dfe6ef;
}

.visualization-notice {
  padding: 12px 14px;
  border: 1px solid #cfe2ff;
  border-radius: 8px;
  background: #f1f7ff;
  color: #25466f;
  font-weight: 700;
}

.visualization-preview {
  display: grid;
  place-items: center;
  overflow: auto;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 18px 38px rgba(28, 43, 68, 0.16);
}

.visualization-preview svg {
  display: block;
  max-width: 100%;
  height: auto;
}

.project-filters {
  display: grid;
  grid-template-columns: minmax(220px, 1fr) repeat(3, minmax(160px, 220px)) auto;
  gap: 12px;
  align-items: end;
  margin-bottom: 18px;
}

.project-filters label span,
.rename-form label span {
  display: block;
  margin-bottom: 6px;
  color: #354057;
  font-weight: 750;
}

.project-quick-actions {
  margin-bottom: 20px;
}

.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 18px;
}

.project-card {
  overflow: hidden;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 14px 28px rgba(30, 43, 68, .08);
}

.project-preview {
  display: block;
  height: 210px;
  background: #f4f7fb;
  border-bottom: 1px solid var(--line);
}

.project-preview img,
.project-detail-preview img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.project-card-body {
  display: grid;
  gap: 10px;
  padding: 14px;
}

.project-card h2 {
  margin: 0;
  font-size: 1.1rem;
}

.module-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.module-badges span {
  padding: 4px 8px;
  border: 1px solid #cfe2ff;
  border-radius: 999px;
  background: #f1f7ff;
  color: #25466f;
  font-size: .78rem;
  font-weight: 800;
}

.project-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.project-actions form {
  margin: 0;
}

.button.danger {
  border-color: #ffd5d5;
  color: #9f1b1b;
}

.empty-state {
  display: grid;
  gap: 12px;
  padding: 32px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.project-detail-head {
  display: flex;
  justify-content: space-between;
  gap: 18px;
}

.rename-form {
  display: flex;
  align-items: end;
  gap: 10px;
}

.project-detail-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 260px 280px;
  gap: 18px;
  align-items: start;
}

.project-detail-preview {
  height: 620px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.project-detail-panel {
  display: grid;
  gap: 10px;
  padding: 14px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.project-detail-panel form {
  margin: 0;
}

.project-facts {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 8px 12px;
  margin: 0;
}

.project-facts dt {
  color: #687386;
  font-weight: 800;
}

.project-facts dd {
  margin: 0;
  word-break: break-word;
}

.sketch-app {
  display: grid;
  gap: 18px;
}

.sketch-head {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: end;
}

.sketch-layout {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr) 320px;
  gap: 16px;
  align-items: start;
}

.sketch-panel,
.result-card {
  display: grid;
  gap: 12px;
  padding: 14px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 14px 28px rgba(30, 43, 68, .07);
}

.sketch-panel h2,
.result-card h2 {
  margin: 0;
  font-size: 1.08rem;
}

.sketch-tool-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

.sketch-workbench {
  display: grid;
  gap: 10px;
  min-width: 0;
}

.sketch-canvas-frame {
  overflow: auto;
  padding: 14px;
  background: #eef3f8;
  border: 1px solid var(--line);
  border-radius: 8px;
}

#sketchCanvas {
  display: block;
  width: 100%;
  max-width: 860px;
  height: auto;
  margin: 0 auto;
  background: #fff;
  border: 1px solid #ccd6e3;
  border-radius: 8px;
  box-shadow: 0 18px 34px rgba(35, 48, 70, .12);
  touch-action: none;
}

.sketch-status {
  min-height: 22px;
  color: #526070;
  font-weight: 750;
}

.sketch-help,
.sketch-warning {
  padding: 12px;
  border-radius: 8px;
  line-height: 1.5;
}

.sketch-help {
  background: #f4f7fb;
  color: #3d4a5c;
}

.sketch-warning {
  border: 1px solid #f1d9a8;
  background: #fff8e8;
  color: #654a13;
}

.checkbox-stack {
  display: grid;
  gap: 8px;
}

.checkbox-stack label {
  display: flex;
  gap: 8px;
  align-items: center;
}

.measurement-form.compact {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.sketch-result-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.2fr) 280px;
  gap: 18px;
  align-items: start;
}

.result-card img {
  width: 100%;
  min-height: 280px;
  object-fit: contain;
  background: #f7f9fc;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.vertical-actions {
  display: grid;
  gap: 8px;
}

@media (max-width: 1020px) {
  .shell { grid-template-columns: 1fr; }
  .sidebar {
    position: static;
    height: auto;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }
  nav { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .hero, .editor-grid, .steps, .stats-row, .import-layout, .train-form, .template-detail, .template-filters, .nesting-layout, .visualization-layout, .project-filters, .project-detail-layout, .sketch-layout, .sketch-result-layout { grid-template-columns: 1fr; }
  .cad-body { min-height: auto; }
  .cad-workbench { min-height: 520px; }
  .cad-props { border-left: 0; border-top: 1px solid var(--line); }
  .cad-topbar { align-items: flex-start; flex-direction: column; }
  .nesting-topbar { align-items: flex-start; flex-direction: column; }
  .visualization-topbar { align-items: flex-start; flex-direction: column; }
  .project-detail-head, .rename-form { align-items: flex-start; flex-direction: column; }
  .sketch-head { align-items: flex-start; flex-direction: column; }
  .nesting-panel, .nesting-panel:last-child { border-left: 0; border-right: 0; border-bottom: 1px solid var(--line); }
  .visualization-panel, .visualization-panel:last-child { border-left: 0; border-right: 0; border-bottom: 1px solid var(--line); }
  .grading-controls { grid-template-columns: 1fr; }
  h1 { font-size: 2.2rem; }
  .page-head { display: grid; align-items: start; }
  .content { padding: 20px; }
}

@media (max-width: 760px) {
  #mobileToolsBtn {
    display: inline-flex;
  }

  .cad-body,
  .cad-body.sidebar-collapsed {
    position: relative;
    display: grid;
    grid-template-columns: 1fr;
  }

  .cad-tools.editor-sidebar {
    position: absolute;
    z-index: 12;
    top: 0;
    bottom: 0;
    left: 0;
    width: min(300px, 88vw);
    max-height: 100%;
    transform: translateX(-105%);
    box-shadow: 18px 0 36px rgba(24, 34, 52, .18);
  }

  .cad-body.mobile-tools-open .cad-tools.editor-sidebar {
    transform: translateX(0);
  }

  .editor-sidebar.collapsed {
    align-items: stretch;
  }

  .editor-sidebar.collapsed .tool-group,
  .editor-sidebar.collapsed .tool-group-body {
    display: grid;
  }

  .editor-sidebar.collapsed .sidebar-collapse-toggle {
    writing-mode: horizontal-tb;
    width: 100%;
    min-height: 42px;
  }
}

@media (max-width: 640px) {
  nav { grid-template-columns: 1fr; }
  .hero > div:first-child { padding: 28px; }
  .dataset-item { grid-template-columns: 1fr; }
  .dataset-item img { width: 100%; height: 220px; }
  .correction-row { align-items: stretch; flex-direction: column; }
  .button { width: 100%; }
  .form-row { grid-template-columns: 1fr; }
  .imported-card { grid-template-columns: 1fr; }
  .imported-card img { width: 100%; height: 160px; }
  .measurement-form { grid-template-columns: 1fr; }
  .template-detail-preview { height: 420px; min-height: 0; }
}