:root {
  color-scheme: light;
  --bg: #eef2f0;
  --surface: #ffffff;
  --surface-2: #f8faf8;
  --surface-3: #f2f6f4;
  --ink: #172126;
  --muted: #64727b;
  --faint: #8a969d;
  --line: #d7e0dc;
  --line-soft: #e5ece9;
  --accent: #0e7c72;
  --accent-dark: #084c49;
  --accent-soft: #dff2ef;
  --warm: #c9822f;
  --warm-soft: #f3dfc1;
  --cut: #d11a2a;
  --cut-soft: #fee8e8;
  --blue: #2a6f97;
  --blue-soft: #e3f0f7;
  --success: #247a45;
  --success-soft: #e1f2e8;
  --shadow: 0 18px 48px rgba(23, 33, 38, 0.09);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--ink);
  font: 14px/1.45 Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

button,
input,
select,
output {
  font: inherit;
}

button {
  border: 1px solid var(--accent);
  border-radius: 6px;
  background: var(--accent);
  color: #fff;
  padding: 9px 14px;
  cursor: pointer;
  min-height: 40px;
  font-weight: 750;
}

button:hover {
  background: var(--accent-dark);
  border-color: var(--accent-dark);
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.48;
}

button.secondary {
  background: var(--surface-3);
  border-color: var(--line);
  color: var(--ink);
}

button.secondary:hover {
  background: #e9eeee;
}

button.danger {
  width: 100%;
  background: var(--cut-soft);
  border-color: #f4b8b8;
  color: var(--cut);
}

.app-shell {
  min-height: 100vh;
}

.tool {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.topbar {
  display: grid;
  grid-template-columns: auto auto minmax(260px, 1fr) auto;
  gap: 16px;
  align-items: center;
  min-height: 72px;
  padding: 12px 24px;
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(10px);
  position: sticky;
  top: 0;
  z-index: 10;
}

.brand {
  display: grid;
  grid-template-columns: 36px auto;
  gap: 12px;
  align-items: center;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border: 1px solid #b9deda;
  border-radius: 8px;
  background: var(--accent-soft);
  color: var(--accent);
  font-weight: 850;
}

h1,
h2,
h3,
p {
  margin: 0;
}

h1 {
  font-size: 19px;
  line-height: 1.1;
  letter-spacing: 0;
}

h2 {
  font-size: 18px;
  line-height: 1.2;
  letter-spacing: 0;
}

h3 {
  font-size: 14px;
  line-height: 1.2;
}

.brand p,
.panel-heading p,
.card-heading p {
  color: var(--muted);
  font-size: 12px;
  line-height: 1.35;
}

.mode-tabs {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: 1fr;
  width: 210px;
  padding: 3px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: var(--surface-3);
}

.mode-tabs.compact {
  width: 220px;
}

.tab {
  min-height: 30px;
  padding: 4px 10px;
  border: 0;
  background: transparent;
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
}

.tab:hover {
  background: transparent;
  color: var(--ink);
}

.tab.is-active,
.tab[aria-pressed="true"] {
  background: var(--surface);
  color: var(--ink);
  box-shadow: 0 1px 3px rgba(23, 33, 38, 0.1);
}

.metrics {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  color: var(--muted);
  font-size: 12px;
  min-width: 0;
}

.metrics span,
.status-chip {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  min-height: 28px;
  padding: 4px 11px;
  border: 1px solid var(--line-soft);
  border-radius: 999px;
  background: var(--surface-3);
  white-space: nowrap;
}

.metrics span:nth-child(2n) {
  background: var(--blue-soft);
  color: var(--blue);
}

.metrics span:nth-child(3n) {
  background: var(--warm-soft);
  color: #70481e;
}

.actions {
  display: flex;
  gap: 8px;
  justify-content: flex-end;
}

.workspace {
  flex: 1;
  min-height: 0;
  display: grid;
  grid-template-columns: minmax(280px, 320px) minmax(420px, 1fr) minmax(300px, 340px);
  gap: 20px;
  padding: 20px;
}

.panel {
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.panel-heading,
.card-heading {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
  padding: 18px 20px 0;
}

.panel-heading {
  display: grid;
}

.controls {
  overflow: auto;
  padding-bottom: 20px;
}

fieldset {
  margin: 0 20px 20px;
  padding: 0 0 20px;
  border: 0;
  border-bottom: 1px solid var(--line-soft);
}

fieldset:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

legend {
  margin: 0 0 12px;
  padding-top: 20px;
  font-size: 14px;
  font-weight: 850;
  color: var(--ink);
}

label {
  display: grid;
  gap: 7px;
  margin: 0 0 12px;
  color: var(--muted);
  font-size: 11px;
  font-weight: 750;
}

label span {
  display: flex;
  justify-content: space-between;
  gap: 8px;
}

.field-row {
  display: grid;
  gap: 12px;
}

.field-row.two-up {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.field-row.three-up {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

input,
select {
  width: 100%;
  min-height: 40px;
  border: 1px solid #cfd9d5;
  border-radius: 6px;
  background: var(--surface);
  color: var(--ink);
  padding: 9px 10px;
  font-weight: 600;
}

input[type="color"] {
  padding: 5px;
}

input[type="range"] {
  padding: 0;
  min-height: 28px;
  accent-color: var(--accent);
}

input:focus,
select:focus,
button:focus {
  outline: 2px solid rgba(14, 124, 114, 0.28);
  outline-offset: 2px;
}

.switch-row {
  grid-template-columns: 1fr auto;
  align-items: center;
  min-height: 38px;
  color: var(--ink);
  font-size: 13px;
  font-weight: 650;
}

.switch-row input {
  width: 44px;
  min-height: 24px;
}

.switch-row input[type="checkbox"] {
  appearance: none;
  position: relative;
  height: 24px;
  border: 0;
  border-radius: 999px;
  background: #cfd9d5;
  padding: 0;
  cursor: pointer;
}

.switch-row input[type="checkbox"]::before {
  content: "";
  position: absolute;
  top: 3px;
  left: 3px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 1px 3px rgba(23, 33, 38, 0.22);
  transition: transform 120ms ease;
}

.switch-row input[type="checkbox"]:checked {
  background: var(--accent);
}

.switch-row input[type="checkbox"]:checked::before {
  transform: translateX(20px);
}

.callout {
  display: grid;
  gap: 4px;
  padding: 12px 14px;
  border: 1px solid #b7d0df;
  border-radius: 6px;
  background: var(--blue-soft);
  color: #315d73;
  font-size: 12px;
  line-height: 1.35;
}

.callout strong {
  color: var(--blue);
}

.preview-column {
  min-width: 0;
  display: grid;
  grid-template-rows: auto auto;
  align-content: start;
  gap: 16px;
}

.preview-card,
.production-card,
.export-panel {
  overflow: hidden;
}

.preview-3d {
  position: relative;
  height: 430px;
  min-height: 430px;
  margin: 16px 20px 20px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background:
    linear-gradient(90deg, rgba(14, 124, 114, 0.08) 1px, transparent 1px),
    linear-gradient(rgba(14, 124, 114, 0.08) 1px, transparent 1px),
    var(--surface-2);
  background-size: 24px 24px;
  overflow: hidden;
}

.preview-3d canvas {
  display: block;
  width: 100%;
  height: 100%;
}

.preview-badge {
  position: absolute;
  left: 14px;
  bottom: 14px;
  z-index: 2;
  border: 1px solid rgba(23, 33, 38, 0.12);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.9);
  color: #39474d;
  padding: 5px 10px;
  font-size: 12px;
  pointer-events: none;
}

.summary-metrics {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 10px;
  padding: 16px 20px 20px;
}

.metric-card {
  min-height: 72px;
  padding: 12px;
  border: 1px solid var(--line-soft);
  border-radius: 6px;
  background: var(--surface);
}

.metric-card span {
  display: block;
  margin-bottom: 8px;
  color: var(--muted);
  font-size: 11px;
  font-weight: 750;
}

.metric-card strong {
  display: block;
  color: var(--accent);
  font-size: 18px;
  line-height: 1.15;
}

.validation-panel {
  display: grid;
  gap: 10px;
  margin: 0 20px 20px;
}

.validation-summary {
  display: grid;
  gap: 4px;
  padding: 12px;
  border: 1px solid var(--line-soft);
  border-radius: 6px;
  background: var(--surface-3);
  color: var(--muted);
}

.validation-summary strong {
  color: var(--ink);
}

.validation-summary.is-ready {
  border-color: #b8d9c5;
  background: var(--success-soft);
  color: var(--success);
}

.validation-summary.is-warning {
  border-color: #e3c28d;
  background: var(--warm-soft);
  color: #70481e;
}

.validation-summary.is-error {
  border-color: #f4b8b8;
  background: var(--cut-soft);
  color: var(--cut);
}

.validation-list {
  display: grid;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.validation-item {
  display: grid;
  grid-template-columns: 58px 1fr;
  gap: 10px;
  align-items: start;
  padding: 10px 12px;
  border: 1px solid var(--line-soft);
  border-radius: 6px;
  background: var(--surface);
  color: var(--muted);
  font-size: 12px;
  line-height: 1.35;
}

.validation-item strong {
  color: var(--ink);
}

.validation-item.is-warning strong {
  color: #70481e;
}

.validation-item.is-error strong {
  color: var(--cut);
}

.validation-more {
  color: var(--muted);
  font-size: 12px;
}

.export-panel {
  overflow: auto;
}

.svg-preview {
  position: relative;
  min-height: 230px;
  margin: 16px 20px 20px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface-2);
  overflow: auto;
}

.svg-preview.is-placing-feature {
  cursor: crosshair;
  box-shadow: inset 0 0 0 2px rgba(14, 124, 114, 0.22);
}

.svg-preview svg {
  display: block;
  width: 100%;
  height: auto;
  min-height: 160px;
}

.svg-preview svg .cut {
  stroke-width: max(0.32px, 0.1mm) !important;
}

.svg-preview svg .panel-hit.is-hovered {
  fill: rgba(14, 124, 114, 0.09);
  stroke: var(--accent);
  stroke-width: max(0.5px, 0.16mm);
  stroke-dasharray: 2 2;
}

.svg-preview svg .feature {
  pointer-events: all;
}

.svg-preview svg .feature.is-selected {
  fill: rgba(14, 124, 114, 0.16);
  stroke: var(--accent-dark) !important;
  stroke-width: max(0.8px, 0.24mm) !important;
}

.feature-panel,
.export-settings {
  margin: 0 20px 22px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--line-soft);
}

.export-settings {
  border-bottom: 0;
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-bottom: 10px;
}

.tool-button[aria-pressed="true"] {
  background: var(--accent-soft);
  border-color: var(--accent);
  color: var(--accent-dark);
}

.feature-status {
  min-height: 34px;
  margin-bottom: 12px;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.4;
}

.feature-status.warning {
  color: #70481e;
}

.feature-status.ready {
  color: var(--success);
}

.feature-preset,
.feature-editor {
  display: grid;
  gap: 4px;
  margin-bottom: 14px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface-3);
}

.feature-editor[hidden] {
  display: none;
}

.shape-field.is-hidden {
  display: none;
}

.feature-editor output {
  display: flex;
  align-items: center;
  width: 100%;
  min-height: 40px;
  border: 1px solid #cfd9d5;
  border-radius: 6px;
  background: var(--surface);
  color: var(--ink);
  padding: 9px 10px;
  font-weight: 600;
}

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

.feature-list:empty::before {
  content: "No features added yet.";
  display: block;
  padding: 12px;
  border: 1px dashed var(--line);
  border-radius: 6px;
  color: var(--muted);
  font-size: 12px;
}

.feature-item {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 6px 12px;
  width: 100%;
  min-height: 0;
  padding: 10px 12px;
  border-color: var(--line);
  background: var(--surface);
  color: var(--ink);
  text-align: left;
}

.feature-item:hover,
.feature-item.is-selected {
  background: var(--accent-soft);
  border-color: var(--accent);
}

.feature-item strong,
.feature-item span {
  display: block;
}

.feature-item span {
  color: var(--muted);
  font-size: 12px;
  font-weight: 600;
}

.error {
  margin: 12px 20px 0;
  padding: 10px 12px;
  border: 1px solid rgba(180, 35, 24, 0.28);
  background: #fff4f2;
  color: #b42318;
  border-radius: 6px;
}

@media (max-width: 1180px) {
  .topbar {
    grid-template-columns: auto 1fr auto;
  }

  .topbar > .mode-tabs {
    display: none;
  }

  .metrics {
    order: 4;
    grid-column: 1 / -1;
  }

  .workspace {
    grid-template-columns: 300px minmax(420px, 1fr);
  }

  .export-panel {
    grid-column: 1 / -1;
  }
}

@media (max-width: 840px) {
  .topbar {
    position: static;
    grid-template-columns: 1fr auto;
    padding: 12px 16px;
  }

  .actions {
    grid-column: 1 / -1;
    justify-content: stretch;
  }

  .actions button {
    flex: 1;
  }

  .metrics {
    display: none;
  }

  .workspace {
    grid-template-columns: 1fr;
    padding: 16px;
  }

  .preview-column {
    order: -1;
    grid-template-rows: auto auto;
  }

  .preview-3d {
    height: 280px;
    min-height: 280px;
  }

  .summary-metrics {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .controls,
  .export-panel {
    overflow: visible;
  }
}

@media (max-width: 560px) {
  body {
    background: #f3f6f4;
  }

  .brand p,
  .card-heading p,
  .panel-heading p {
    display: none;
  }

  .workspace {
    padding: 16px;
    gap: 20px;
  }

  .panel {
    box-shadow: 0 10px 32px rgba(23, 33, 38, 0.08);
  }

  .card-heading,
  .panel-heading {
    padding: 16px 16px 0;
  }

  fieldset,
  .feature-panel,
  .validation-panel,
  .export-settings {
    margin-inline: 16px;
  }

  .field-row.three-up,
  .field-row.two-up {
    grid-template-columns: 1fr;
  }

  .controls fieldset:first-of-type .three-up {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .preview-3d {
    height: 230px;
    min-height: 230px;
    margin: 14px 14px 16px;
  }

  .svg-preview {
    margin: 14px 16px 18px;
  }

  .mode-tabs.compact {
    display: none;
  }

  .summary-metrics {
    grid-template-columns: 1fr;
  }
}