:root {
  color-scheme: light;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #e9e7e1;
  color: #252923;

  --page-width: 1180px;
  --surface: #f7f5ef;
  --surface-strong: #ffffff;
  --line: #c9c6bc;
  --muted: #62685f;

  --accent: #65705e;
  --accent-light: #9ca58f;
  --accent-dark: #4e5849;
  --profile-stroke: #41493d;

  --wall: #eeeae2;
  --wall-stroke: #85867f;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-width: 320px;
  min-height: 100vh;
}

button,
input,
select {
  font: inherit;
}

.page {
  width: min(100% - 32px, var(--page-width));
  margin: 0 auto;
  padding: 48px 0 64px;
}

.page__header {
  max-width: 760px;
  margin-bottom: 28px;
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--accent-dark);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

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

h1 {
  margin-bottom: 12px;
  font-size: clamp(1.4rem, 3.5vw, 2.4rem);
  line-height: 1;
}

h2 {
  margin-bottom: 6px;
  font-size: 1.15rem;
}

p {
  color: var(--muted);
  line-height: 1.55;
}

.drawing-card,
.parameters {
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--surface);
  box-shadow: 0 12px 32px rgb(41 45 39 / 8%);
}

.drawing-card {
  padding: 22px;
}

.section-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 18px;
}

.section-heading p {
  margin-bottom: 0;
}

.status {
  flex: 0 0 auto;
  border: 1px solid #abb2a4;
  border-radius: 999px;
  padding: 7px 12px;
  background: #edf0e9;
  color: #3e493a;
  font-size: 0.88rem;
  font-weight: 650;
}

.status--error {
  border-color: #c68e89;
  background: #f5e7e5;
  color: #783d37;
}

.drawing-frame {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface-strong);
}

#wallDrawing {
  display: block;
  width: 100%;
  height: auto;
  min-height: 360px;
}

.wall {
  fill: var(--wall);
  stroke: var(--wall-stroke);
  stroke-width: 0.8;
}

.wainscot-background {
  fill: var(--accent-light);
}

.frame-part {
  fill: var(--accent);
  stroke: var(--accent-dark);
  stroke-width: 0.35;
}

.profile-part {
  fill: var(--accent-dark);
  stroke: var(--profile-stroke);
  stroke-width: 0.35;
}

.dimension-line {
  fill: none;
  stroke: #4d514c;
  stroke-width: 0.45;
}

.dimension-extension {
  fill: none;
  stroke: #8b8e88;
  stroke-width: 0.35;
  stroke-dasharray: 2 1.5;
}

.dimension-text {
  fill: #31352f;
  font-size: 7px;
  font-weight: 650;
  text-anchor: middle;
}

.field-label {
  fill: #30372d;
  font-size: 7px;
  font-weight: 700;
  text-anchor: middle;
}

.parameters {
  margin-top: 20px;
  padding: 22px;
}

.parameter-grid,
.result-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}

.parameter-card,
.result-grid > div {
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 14px;
  background: var(--surface-strong);
}

.parameter-card {
  display: flex;
  flex-direction: column;
  gap: 9px;
  cursor: text;
}

.parameter-card:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgb(101 112 94 / 15%);
}

.parameter-card__label,
.result-grid dt {
  color: var(--muted);
  font-size: 0.84rem;
}

.parameter-card__label var {
  margin-left: 0.25em;
  color: var(--accent-dark);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.05em;
  font-weight: 700;
}

.number-control,
.color-control {
  display: flex;
  align-items: center;
  gap: 8px;
}

.number-control input {
  min-width: 0;
  width: 100%;
  border: 0;
  border-bottom: 2px solid #d6d3ca;
  padding: 3px 0 5px;
  background: transparent;
  color: #252923;
  font-size: 1.25rem;
  font-weight: 750;
  outline: 0;
}

.number-control input:focus {
  border-bottom-color: var(--accent);
}

.number-control input:invalid {
  border-bottom-color: #a75a52;
}

.unit {
  flex: 0 0 auto;
  color: var(--muted);
  font-size: 0.84rem;
}

.parameter-card__note {
  color: var(--muted);
  font-size: 0.72rem;
  line-height: 1.3;
}

.parameter-card--color {
  cursor: pointer;
}

.color-control input[type="color"] {
  width: 52px;
  height: 34px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 2px;
  background: var(--surface-strong);
  cursor: pointer;
}

.color-control output {
  color: #373b35;
  font-family: ui-monospace, "Cascadia Code", Consolas, monospace;
  font-size: 0.9rem;
  font-weight: 700;
}

.ral-control {
  display: grid;
  gap: 5px;
  margin-top: 3px;
  color: var(--muted);
  font-size: 0.78rem;
  cursor: pointer;
}

.ral-control select {
  width: 100%;
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 7px 30px 7px 9px;
  background: var(--surface-strong);
  color: #252923;
  cursor: pointer;
}

.ral-control select:focus-visible {
  outline: 3px solid rgb(101 112 94 / 15%);
  outline-offset: 2px;
}

.ral-disclaimer {
  margin: 12px 0 0;
  font-size: 0.78rem;
}

.computed-heading {
  margin-top: 26px;
}

.result-grid {
  margin: 12px 0 0;
}

.result-grid dd {
  margin: 6px 0 0;
  font-size: 1.35rem;
  font-weight: 750;
}

.export-panel {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  margin-top: 26px;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 18px;
  background: var(--surface-strong);
}

.export-panel h2 {
  margin-bottom: 6px;
}

.export-panel p {
  max-width: 68ch;
  margin-bottom: 0;
}

.export-panel__note {
  margin-top: 8px;
  color: #4f594a;
  font-size: 0.84rem;
  font-weight: 700;
}

.export-panel__action {
  display: flex;
  flex: 0 0 auto;
  flex-direction: column;
  align-items: stretch;
  gap: 8px;
}

.export-button {
  border: 1px solid var(--accent-dark);
  border-radius: 10px;
  padding: 11px 18px;
  background: var(--accent);
  color: #ffffff;
  font-weight: 750;
  cursor: pointer;
}

.export-button:hover {
  background: var(--accent-dark);
}

.export-button:focus-visible {
  outline: 3px solid rgb(101 112 94 / 25%);
  outline-offset: 3px;
}

.export-button:disabled {
  cursor: wait;
  opacity: 0.65;
}

.export-status {
  min-height: 1.3em;
  color: var(--muted);
  font-size: 0.78rem;
  text-align: center;
}

@media (max-width: 900px) {
  .parameter-grid,
  .result-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 760px) {
  .page {
    width: min(100% - 20px, var(--page-width));
    padding-top: 28px;
  }

  .section-heading {
    display: block;
  }

  .status {
    display: inline-block;
    margin-top: 10px;
  }

  #wallDrawing {
    min-height: 260px;
  }

  .export-panel {
    display: block;
  }

  .export-panel__action {
    align-items: flex-start;
    margin-top: 16px;
  }
}

@media (max-width: 480px) {
  .parameter-grid,
  .result-grid {
    grid-template-columns: 1fr;
  }
}