:root {
  --ink: #17211f;
  --muted: #5f6d68;
  --line: #d7dfdc;
  --paper: #fbfbf8;
  --panel: #ffffff;
  --accent: #16697a;
  --accent-2: #8a4f2b;
  --danger: #9f2d2d;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  color: var(--ink);
  background: #eef3f1;
}

button,
input,
select {
  font: inherit;
}

.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 76px;
  padding: 14px 22px;
  border-bottom: 1px solid var(--line);
  background: var(--panel);
}

.eyebrow {
  margin: 0 0 2px;
  color: var(--muted);
  font-size: 12px;
  text-transform: uppercase;
}

h1,
h2 {
  margin: 0;
  line-height: 1.1;
}

h1 {
  font-size: 28px;
}

h2 {
  font-size: 15px;
}

.header-actions,
.section-title,
.preview-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.sub-title {
  margin-top: 14px;
}

.workspace {
  display: grid;
  grid-template-columns: minmax(340px, 430px) 1fr;
  min-height: calc(100vh - 76px);
}

.panel {
  overflow: auto;
  max-height: calc(100vh - 76px);
  padding: 18px;
  border-right: 1px solid var(--line);
  background: #f8faf9;
}

.panel-tabs {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
  margin-bottom: 10px;
}

section {
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}

section[hidden] {
  display: none;
}

.grid-two {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-top: 12px;
}

.format-choice {
  display: grid;
  gap: 7px;
  margin-top: 14px;
  color: #30403b;
  font-size: 12px;
  font-weight: 700;
}

.format-buttons {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 7px;
}

.format-button {
  min-height: 34px;
  border: 1px solid #c5cfcb;
  border-radius: 7px;
  padding: 7px 10px;
  background: #fff;
  color: var(--ink);
  cursor: pointer;
  font-size: 12px;
  font-weight: 800;
}

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

.project-transfer {
  display: grid;
  gap: 10px;
  margin-top: 14px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fcfdfd;
}

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

.dropzone {
  display: grid;
  gap: 4px;
  justify-items: center;
  padding: 16px 12px;
  border: 1px dashed #9cb2ab;
  border-radius: 8px;
  background: #f5f9f7;
  color: var(--ink);
  text-align: center;
  cursor: pointer;
}

.dropzone.dragover {
  border-color: var(--accent);
  background: #eaf5f3;
}

.dropzone span,
.helper-text {
  color: var(--muted);
  font-size: 11px;
  font-weight: 600;
}

.helper-text {
  margin: 0;
}

label {
  display: grid;
  gap: 5px;
  color: #30403b;
  font-size: 12px;
  font-weight: 700;
}

input,
select {
  width: 100%;
  min-height: 34px;
  border: 1px solid #c5cfcb;
  border-radius: 6px;
  padding: 7px 9px;
  background: #fff;
  color: var(--ink);
}

input[type="color"] {
  padding: 2px;
}

.rows {
  display: grid;
  gap: 9px;
  margin-top: 12px;
}

.data-row {
  display: grid;
  grid-template-columns: 1.1fr 0.7fr 0.7fr 0.55fr 34px;
  gap: 7px;
  align-items: end;
  padding: 9px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
}

.basement-row {
  grid-template-columns: 0.95fr 0.68fr 0.68fr 0.95fr 0.95fr 34px;
}

.water-row {
  grid-template-columns: 0.6fr 1fr 0.9fr 0.9fr;
  align-items: start;
}

.water-row .check-cell {
  justify-content: center;
}

.water-field {
  min-width: 0;
}

.water-field-toggle {
  align-self: center;
}

.water-help {
  align-self: end;
  color: var(--muted);
  font-size: 11px;
  font-weight: 600;
}

.water-delete {
  justify-self: end;
  align-self: end;
}

.structure-row {
  grid-template-columns: 0.52fr 1fr 0.8fr 0.8fr;
}

.building-card {
  display: grid;
  gap: 10px;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fdfefe;
}

.building-card .data-row {
  padding: 8px;
}

.building-card-title {
  color: var(--ink);
  font-size: 13px;
  font-weight: 800;
}

.building-row {
  grid-template-columns: 1fr 1fr 1fr 34px;
}

.building-subsection {
  display: grid;
  gap: 8px;
}

.building-subsection-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.building-subsection h3 {
  margin: 0;
  font-size: 13px;
  line-height: 1.2;
}

.basement-item {
  grid-template-columns: 1fr 0.8fr 0.8fr 34px;
}

.structure-spacer {
  min-height: 34px;
}

.slider-wrap {
  display: grid;
  gap: 4px;
}

.slider-wrap input[type="range"] {
  min-height: auto;
  padding: 0;
  border: 0;
  background: transparent;
}

.slider-value-wrap {
  display: inline-flex;
  align-items: center;
  justify-content: flex-end;
  gap: 4px;
}

.slider-value-input {
  width: 62px;
  min-height: 28px;
  padding: 4px 6px;
  text-align: right;
}

.slider-unit {
  color: var(--muted);
  font-size: 11px;
  font-weight: 600;
}

.icon-button,
.primary-button,
.small-button,
.danger-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 34px;
  border: 1px solid transparent;
  border-radius: 7px;
  padding: 7px 11px;
  cursor: pointer;
}

.icon-button {
  min-width: 42px;
  border-color: #b9c7c2;
  background: #fff;
  color: var(--ink);
  font-size: 12px;
  font-weight: 800;
}

.primary-button {
  background: var(--accent);
  color: #fff;
  font-weight: 800;
}

.small-button {
  background: #e5eeee;
  color: #17383d;
  font-size: 12px;
  font-weight: 800;
}

.tab-button {
  min-height: 34px;
  border: 1px solid #c5cfcb;
  border-radius: 7px;
  padding: 7px 10px;
  background: #fff;
  color: var(--ink);
  cursor: pointer;
  font-size: 12px;
  font-weight: 800;
}

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

.wide-button {
  width: 100%;
  margin-top: 12px;
}

.danger-button {
  width: 100%;
  margin-top: 12px;
  background: #fff0ed;
  color: var(--danger);
  border-color: #edc3bb;
  font-weight: 800;
}

.delete-button {
  width: 34px;
  height: 34px;
  padding: 0;
  border: 1px solid #e1c1bb;
  border-radius: 7px;
  background: #fff7f5;
  color: var(--danger);
  cursor: pointer;
  font-weight: 900;
}

.file-button input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.check-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 12px;
}

.check-row input {
  width: 18px;
  min-height: 18px;
}

.preview-shell {
  display: grid;
  grid-template-rows: auto 1fr;
  min-width: 0;
  padding: 0;
  border: 0;
}

.preview-toolbar {
  min-height: 50px;
  padding: 10px 18px;
  border-bottom: 1px solid var(--line);
  background: #fff;
  color: var(--muted);
  font-size: 13px;
}

#previewTitle {
  color: var(--ink);
}

#previewSubtitle {
  margin-left: 8px;
}

.sheet-wrap {
  overflow: auto;
  padding: 28px;
  background: #dce5e2;
}

#svgMount {
  width: min(100%, 1120px);
  margin: 0 auto;
}

#svgMount svg {
  display: block;
  width: 100%;
  height: auto;
  background: var(--paper);
  box-shadow: 0 18px 40px rgba(35, 50, 45, 0.2);
}

.draggable-label {
  cursor: move;
  user-select: none;
}

.draggable-label.dragging {
  opacity: 0.78;
}

.draggable-water-line,
.draggable-water-line-hit {
  cursor: ew-resize;
}

@media (max-width: 960px) {
  .app-header {
    align-items: flex-start;
    flex-direction: column;
  }

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

  .panel {
    max-height: none;
    border-right: 0;
  }
}

@media (max-width: 640px) {
  .panel-tabs,
  .grid-two,
  .data-row,
  .basement-row,
  .water-row,
  .structure-row,
  .building-row,
  .basement-item {
    grid-template-columns: 1fr;
  }

  .delete-button {
    width: 100%;
  }

  .sheet-wrap {
    padding: 12px;
  }
}