:root {
  color-scheme: light;
  --ink: #1c2526;
  --muted: #63716c;
  --line: #d9e1dc;
  --paper: #fffefa;
  --soft: #f3f7f1;
  --brand: #1f7a70;
  --brand-dark: #14534d;
  --paint: #e85d4f;
  --tile: #2f7da1;
  --curtain: #8267a8;
  --sun: #f2c94c;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  color: var(--ink);
  background: #f6f7f2;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

a {
  color: var(--brand-dark);
}

.shell {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 20px 56px;
}

.topbar {
  border-bottom: 1px solid var(--line);
  background: rgba(255, 254, 250, .94);
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(12px);
}

.nav {
  max-width: 1160px;
  margin: 0 auto;
  padding: 13px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--ink);
  font-weight: 800;
}

.brand-mark {
  width: 34px;
  height: 34px;
  border-radius: 9px;
  background: conic-gradient(from 180deg, var(--paint), var(--sun), var(--brand), var(--tile), var(--paint));
  box-shadow: inset 0 0 0 2px rgba(255, 255, 255, .72);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.nav-links a {
  color: var(--muted);
  text-decoration: none;
  font-size: 14px;
  font-weight: 650;
  padding: 8px 10px;
  border-radius: 8px;
}

.nav-links a:hover {
  background: var(--soft);
  color: var(--ink);
}

.page-head {
  display: grid;
  grid-template-columns: 1.05fr .95fr;
  gap: 22px;
  align-items: center;
  padding: 34px 0 22px;
}

.page-head img {
  width: 100%;
  height: auto;
  border-radius: 8px;
  border: 1px solid var(--line);
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--brand-dark);
  font-size: 13px;
  font-weight: 800;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  letter-spacing: 0;
  line-height: 1.12;
}

h1 {
  margin: 0;
  font-size: clamp(34px, 5vw, 58px);
}

h2 {
  margin: 0 0 14px;
  font-size: 26px;
}

h3 {
  margin: 22px 0 10px;
  font-size: 19px;
}

p {
  line-height: 1.62;
}

.lead {
  color: var(--muted);
  max-width: 66ch;
  font-size: 17px;
}

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

.tool-link,
.panel,
.guide-list a,
.result-card,
.legal-block {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.tool-link {
  padding: 18px;
  text-decoration: none;
  color: var(--ink);
  min-height: 150px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.tool-link:hover {
  border-color: #9ebbb3;
  box-shadow: 0 12px 28px rgba(28, 37, 38, .08);
}

.tool-kicker {
  display: inline-flex;
  width: fit-content;
  padding: 5px 8px;
  border-radius: 7px;
  font-size: 12px;
  font-weight: 800;
  color: #fff;
}

.paint { background: var(--paint); }
.tile { background: var(--tile); }
.curtain { background: var(--curtain); }

.layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 380px;
  gap: 18px;
  align-items: start;
}

.panel {
  padding: 22px;
}

.calculator {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.field {
  display: grid;
  gap: 6px;
}

.field.wide {
  grid-column: 1 / -1;
}

label {
  color: #394541;
  font-size: 13px;
  font-weight: 750;
}

input,
select {
  width: 100%;
  border: 1px solid #cbd7d1;
  border-radius: 8px;
  padding: 11px 12px;
  color: var(--ink);
  background: #fff;
  font-size: 15px;
}

input:focus,
select:focus {
  outline: 3px solid rgba(31, 122, 112, .18);
  border-color: var(--brand);
}

.button-row {
  grid-column: 1 / -1;
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 4px;
}

button,
.button {
  appearance: none;
  border: 0;
  border-radius: 8px;
  padding: 12px 15px;
  color: #fff;
  background: var(--brand);
  font-size: 15px;
  font-weight: 800;
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

button.secondary,
.button.secondary {
  color: var(--ink);
  background: #dfe8e3;
}

button:hover,
.button:hover {
  background: var(--brand-dark);
}

.result-card {
  padding: 20px;
  position: sticky;
  top: 78px;
}

.result-main {
  display: grid;
  gap: 10px;
  margin: 14px 0;
}

.metric {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 11px 0;
  border-bottom: 1px solid var(--line);
}

.metric strong {
  font-size: 18px;
}

.muted {
  color: var(--muted);
}

.note {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.55;
}

.ad-slot {
  margin: 20px 0;
  border: 1px dashed #afbbb6;
  border-radius: 8px;
  min-height: 92px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #7a8782;
  background: #f9faf7;
  font-size: 13px;
}

.guide-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-top: 16px;
}

.guide-list a {
  padding: 16px;
  text-decoration: none;
  color: var(--ink);
}

.article {
  max-width: 820px;
  margin: 0 auto;
}

.article ul,
.article ol {
  line-height: 1.65;
}

.legal-block {
  padding: 22px;
  max-width: 850px;
  margin: 28px auto 0;
}

.footer {
  border-top: 1px solid var(--line);
  background: var(--paper);
  padding: 24px 20px;
  color: var(--muted);
}

.footer-inner {
  max-width: 1160px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  gap: 18px;
  flex-wrap: wrap;
  font-size: 14px;
}

.footer a {
  color: var(--muted);
  margin-right: 12px;
}

@media (max-width: 860px) {
  .page-head,
  .layout,
  .tool-grid,
  .guide-list {
    grid-template-columns: 1fr;
  }

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

  .result-card {
    position: static;
  }

  .nav {
    align-items: flex-start;
    flex-direction: column;
  }
}