:root {
  color-scheme: light;
  --ink: #151b22;
  --muted: #5c6674;
  --line: #d9dfe8;
  --paper: #f4f6f8;
  --surface: #ffffff;
  --soft: #eaf1ed;
  --accent: #1f6b57;
  --accent-strong: #174437;
  --warm: #c86f3b;
  --blue: #33658a;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.5;
}

a {
  color: var(--accent-strong);
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 18px clamp(18px, 4vw, 48px);
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.9);
}

.brand {
  color: var(--ink);
  font-weight: 800;
  text-decoration: none;
}

nav {
  display: flex;
  gap: 16px;
  font-size: 14px;
}

main {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: 32px 0 56px;
}

.workspace {
  display: grid;
  grid-template-columns: minmax(300px, 0.86fr) minmax(360px, 1fr);
  gap: 24px;
  align-items: start;
}

.intro,
.calculator,
.visual-panel,
.recommendations {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
}

.intro {
  padding: 28px;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--accent);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  font-size: 48px;
  line-height: 0.98;
  letter-spacing: 0;
}

h2 {
  margin: 0;
  font-size: 24px;
  letter-spacing: 0;
}

.lede {
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 17px;
}

.utility-note,
footer,
.recommendations p {
  color: var(--muted);
  font-size: 13px;
}

.utility-note {
  margin: 18px 0 0;
}

.calculator {
  display: grid;
  gap: 18px;
  grid-column: 1;
  padding: 20px;
}

fieldset {
  min-width: 0;
  margin: 0;
  padding: 0;
  border: 0;
}

legend {
  margin-bottom: 10px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

.input-grid {
  display: grid;
  gap: 12px;
}

label {
  display: grid;
  gap: 7px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 700;
}

.field-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 44px;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fbfcfd;
}

.field-row input {
  min-width: 0;
  min-height: 44px;
  width: 100%;
  border: 0;
  background: transparent;
  padding: 10px 12px;
  color: var(--ink);
  font: inherit;
  font-weight: 750;
}

.field-row span {
  color: var(--muted);
  font-size: 13px;
  text-align: center;
}

.field-row:focus-within {
  border-color: var(--warm);
  outline: 3px solid rgba(200, 111, 59, 0.18);
}

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

button,
.link-grid span {
  min-height: 42px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fbfcfd;
  color: var(--ink);
  font: inherit;
  font-size: 14px;
  font-weight: 750;
  text-align: center;
  text-decoration: none;
}

button {
  cursor: pointer;
}

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

.visual-panel {
  display: grid;
  gap: 16px;
  grid-column: 2;
  grid-row: 1 / span 2;
  padding: 20px;
}

canvas {
  width: 100%;
  aspect-ratio: 900 / 460;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #f8fafb;
}

.result-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.result-grid article {
  min-height: 92px;
  display: grid;
  align-content: center;
  gap: 4px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfcfd;
}

.result-grid span {
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

.result-grid strong {
  color: var(--accent-strong);
  font-size: 25px;
  letter-spacing: 0;
}

.recommendations {
  display: grid;
  grid-template-columns: minmax(220px, 0.8fr) minmax(320px, 1.2fr);
  gap: 18px;
  margin-top: 24px;
  padding: 20px;
}

.recommendations p {
  margin: 8px 0 0;
}

.link-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.link-grid span {
  display: grid;
  place-items: center;
  padding: 10px;
}

footer {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: 0 0 42px;
}

@media (max-width: 880px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
  }

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

  .visual-panel {
    grid-column: auto;
    grid-row: auto;
  }

  h1 {
    font-size: 36px;
  }
}

@media (max-width: 520px) {
  .preset-grid,
  .result-grid,
  .link-grid {
    grid-template-columns: 1fr;
  }

  .intro,
  .calculator,
  .visual-panel,
  .recommendations {
    padding: 16px;
  }
}