:root {
  --paper: #f5f4ed;
  --ink: #253d32;
  --terracotta: #b56842;
  --muted: #53645b;
  --line: #d4d8cb;
  --card-bg: #faf9f5;
  --accent-gold: #d49a3d;
  --accent-dark: #1b2d25;
  --highlight: #e8ecde;
  --serif: Georgia, 'Times New Roman', serif;
  --sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 25px;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, p {
  margin-top: 0;
}

h1, h2, h3 {
  font-family: var(--serif);
  font-weight: 400;
  letter-spacing: -0.03em;
  line-height: 1.15;
}

h1 {
  font-size: clamp(38px, 4.8vw, 68px);
}

h2 {
  font-size: clamp(28px, 3.2vw, 42px);
}

em {
  font-style: italic;
  color: var(--terracotta);
}

a {
  color: inherit;
  text-decoration: none;
}

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

button {
  cursor: pointer;
}

button:disabled {
  opacity: 0.5;
  cursor: default;
}

img, svg {
  display: block;
  max-width: 100%;
  height: auto;
}

[hidden] {
  display: none !important;
}

a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible {
  outline: 3px solid var(--terracotta);
  outline-offset: 3px;
}

::selection {
  background: var(--highlight);
  color: var(--ink);
}

.wrap {
  width: min(1180px, calc(100% - 48px));
  margin-inline: auto;
}

.eyebrow {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--terracotta);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.eyebrow::before {
  content: '';
  display: inline-block;
  width: 14px;
  height: 2px;
  background: var(--terracotta);
}

.skip {
  position: absolute;
  left: 20px;
  top: -60px;
  background: var(--ink);
  color: var(--paper);
  padding: 8px 16px;
  z-index: 50;
  border-radius: 2px;
}

.skip:focus {
  top: 10px;
}

/* Header */
.header {
  height: 90px;
  display: flex;
  align-items: center;
  gap: 32px;
  border-bottom: 1px solid var(--line);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.brand svg {
  width: 36px;
  height: 36px;
}

.brand > span {
  font-family: var(--serif);
  font-size: 24px;
  line-height: 1;
  letter-spacing: -0.5px;
  font-weight: 600;
  color: var(--ink);
}

.brand small {
  display: block;
  font-family: var(--sans);
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 3.5px;
  margin-top: 4px;
  color: var(--terracotta);
}

.header nav {
  display: flex;
  align-items: center;
  gap: 28px;
  margin-inline: auto;
  font-size: 13px;
  font-weight: 500;
}

.header nav a {
  color: var(--muted);
  transition: color 150ms;
}

.header nav a:hover, .header nav a[aria-current="true"] {
  color: var(--ink);
  text-decoration: underline;
  text-underline-offset: 6px;
  text-decoration-color: var(--terracotta);
}

.nav-cta {
  font-size: 12px;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 10px 18px;
  border: 1px solid var(--ink);
  border-radius: 3px;
  background: var(--ink);
  color: var(--paper);
  transition: background 150ms, transform 150ms;
}

.nav-cta:hover {
  background: #325243;
  transform: translateY(-1px);
}

/* Hero */
.hero {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  align-items: center;
  gap: 48px;
  padding-block: 60px 50px;
}

.hero h1 {
  margin-bottom: 22px;
  line-height: 1.08;
}

.hero-description {
  max-width: 480px;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.8;
  margin-bottom: 30px;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  background: var(--ink);
  color: var(--paper);
  border: 1px solid var(--ink);
  border-radius: 3px;
  min-height: 48px;
  padding: 12px 24px;
  font-size: 13px;
  font-weight: 600;
  transition: background 160ms, transform 160ms;
}

.button:hover {
  background: #325243;
  transform: translateY(-1px);
}

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

.button.secondary:hover {
  background: #ede9dc;
}

.text-link {
  font-size: 13px;
  font-weight: 600;
  display: inline-flex;
  gap: 8px;
  align-items: center;
  color: var(--terracotta);
  border-bottom: 1px solid var(--terracotta);
  padding-bottom: 2px;
}

.text-link:hover {
  color: var(--ink);
  border-color: var(--ink);
}

.hero-footnote {
  margin-top: 32px;
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 11px;
  color: var(--muted);
}

.hero-footnote span {
  font-family: var(--mono);
  font-weight: 700;
  color: var(--terracotta);
}

.hero-art {
  position: relative;
}

.hero-art > img, .hero-art > svg {
  width: 100%;
  border-radius: 6px;
  border: 1px solid var(--line);
  box-shadow: 0 4px 20px rgba(37, 61, 50, 0.06);
}

/* Strip */
.features {
  border-block: 1px solid var(--line);
  background: var(--card-bg);
}

.features > .wrap {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  min-height: 56px;
  font-size: 12px;
  color: var(--muted);
  flex-wrap: wrap;
  padding-block: 12px;
}

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

/* Sections */
.section {
  padding-block: 64px;
}

.section-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 30px;
  margin-bottom: 36px;
}

.section-head h2 {
  margin-bottom: 0;
}

.section-head > p {
  color: var(--muted);
  font-size: 13px;
  max-width: 440px;
  margin-bottom: 0;
}

/* Tool Grid */
.tool-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}

.tool-card {
  border: 1px solid var(--line);
  border-radius: 4px;
  background: var(--card-bg);
  overflow: hidden;
  transition: transform 180ms, border-color 180ms, box-shadow 180ms;
  display: flex;
  flex-direction: column;
}

.tool-card:hover {
  border-color: var(--terracotta);
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(181, 104, 66, 0.08);
}

.tool-art {
  border-bottom: 1px solid var(--line);
  background: var(--paper);
}

.tool-art img, .tool-art svg {
  width: 100%;
  height: 180px;
  object-fit: contain;
}

.tool-card-copy {
  padding: 24px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.tool-card-copy .badge {
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--terracotta);
  text-transform: uppercase;
  margin-bottom: 8px;
}

.tool-card-copy h3 {
  font-size: 20px;
  margin-bottom: 10px;
  color: var(--ink);
}

.tool-card-copy > p {
  font-size: 13px;
  color: var(--muted);
  line-height: 1.65;
  margin-bottom: 20px;
  flex-grow: 1;
}

.card-link {
  font-size: 12px;
  font-weight: 600;
  color: var(--terracotta);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border-top: 1px solid var(--line);
  padding-top: 16px;
}

/* Calculator Widget */
.calculator {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--card-bg);
  overflow: hidden;
  box-shadow: 0 4px 20px rgba(37, 61, 50, 0.04);
  margin-bottom: 48px;
}

.form-side {
  padding: 36px 32px;
}

.widget-eyebrow {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-bottom: 24px;
  border-bottom: 1px solid var(--line);
  padding-bottom: 14px;
}

.widget-eyebrow .eyebrow {
  margin-bottom: 0;
}

.tag {
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 600;
  background: var(--highlight);
  color: var(--ink);
  padding: 4px 8px;
  border-radius: 2px;
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px 18px;
  margin-bottom: 24px;
}

.form-grid.three {
  grid-template-columns: 1fr 1fr 1fr;
}

.form-grid.full {
  grid-template-columns: 1fr;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.field label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--ink);
}

.field input, .field select {
  font-size: 15px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 3px;
  background: var(--paper);
  color: var(--ink);
  transition: border-color 150ms;
}

.field input:focus, .field select:focus {
  border-color: var(--terracotta);
}

.field-help {
  font-size: 11px;
  color: var(--muted);
  line-height: 1.4;
}

/* Preset Strip */
.presets-strip {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 24px;
  padding: 12px 14px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 4px;
}

.presets-strip span {
  font-size: 11px;
  font-weight: 600;
  color: var(--muted);
  margin-right: 4px;
}

.preset-chip {
  font-size: 11px;
  font-weight: 500;
  background: var(--card-bg);
  border: 1px solid var(--line);
  padding: 4px 10px;
  border-radius: 12px;
  color: var(--ink);
  transition: all 140ms;
}

.preset-chip:hover {
  border-color: var(--terracotta);
  background: var(--highlight);
  color: var(--terracotta);
}

/* Dynamic Appliance Table */
.appliance-table-wrap {
  margin-bottom: 24px;
}

.appliance-head {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 0.8fr 0.8fr 36px;
  gap: 8px;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line);
}

.appliance-rows {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 8px;
}

.appliance-row {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 0.8fr 0.8fr 36px;
  gap: 8px;
  align-items: center;
}

.appliance-row input, .appliance-row select {
  font-size: 13px;
  padding: 8px 10px;
  border: 1px solid var(--line);
  border-radius: 2px;
  background: var(--paper);
}

.appliance-row .btn-remove {
  background: transparent;
  border: 1px solid var(--line);
  color: var(--muted);
  border-radius: 2px;
  width: 34px;
  height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  transition: all 140ms;
}

.appliance-row .btn-remove:hover {
  background: #feece8;
  color: #b52b27;
  border-color: #f0a399;
}

.table-actions {
  display: flex;
  gap: 12px;
  margin-top: 12px;
}

.btn-small {
  font-size: 11px;
  font-weight: 600;
  padding: 6px 14px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 2px;
  color: var(--ink);
  transition: all 140ms;
}

.btn-small:hover {
  background: var(--highlight);
  border-color: var(--terracotta);
}

/* Result Side */
.result-side {
  background: #fbf9f4;
  border-left: 1px solid var(--line);
  padding: 36px 32px;
  display: flex;
  flex-direction: column;
}

.result-eyebrow {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--terracotta);
  margin-bottom: 8px;
}

.main-result {
  font-family: var(--serif);
  font-size: clamp(44px, 4.5vw, 64px);
  line-height: 1.05;
  color: var(--ink);
  margin-bottom: 6px;
  font-weight: 400;
}

.main-result small {
  font-family: var(--sans);
  font-size: 18px;
  font-weight: 600;
  color: var(--terracotta);
  margin-left: 4px;
}

.result-subline {
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 24px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
}

.result-metric-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-bottom: 24px;
}

.metric-box {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 12px 14px;
}

.metric-box label {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--muted);
  display: block;
  margin-bottom: 4px;
}

.metric-box .metric-val {
  font-family: var(--mono);
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
}

.metric-box .metric-sub {
  font-size: 10px;
  color: var(--muted);
  margin-top: 2px;
}

.recommendations-box {
  background: var(--highlight);
  border: 1px solid #c9d2bd;
  border-radius: 4px;
  padding: 16px;
  margin-bottom: 24px;
}

.recommendations-box h4 {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink);
  margin-bottom: 8px;
}

.recommendations-box ul {
  margin: 0;
  padding-left: 18px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--ink);
}

.recommendations-box li + li {
  margin-top: 6px;
}

.result-footer-actions {
  margin-top: auto;
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}

/* Notes List */
.note-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.note-card {
  display: grid;
  grid-template-columns: 48px 1fr 24px;
  align-items: center;
  gap: 24px;
  padding: 24px 28px;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: var(--card-bg);
  transition: all 160ms;
}

.note-card:hover {
  border-color: var(--terracotta);
  transform: translateX(4px);
  background: var(--paper);
}

.note-index {
  font-family: var(--mono);
  font-size: 20px;
  font-weight: 700;
  color: var(--terracotta);
}

.note-card h3 {
  font-size: 20px;
  margin-bottom: 6px;
}

.note-card p {
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 0;
  line-height: 1.6;
}

.note-arrow {
  font-size: 18px;
  color: var(--muted);
}

/* Article Layout */
.article-header {
  padding-block: 48px 36px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 40px;
}

.article-header h1 {
  font-size: clamp(34px, 4vw, 54px);
  margin-bottom: 16px;
}

.article-lead {
  font-size: 18px;
  color: var(--muted);
  line-height: 1.6;
  max-width: 780px;
}

.article-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 48px;
  padding-bottom: 64px;
}

.prose {
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink);
}

.prose h2 {
  font-size: 26px;
  margin-top: 40px;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line);
}

.prose p {
  margin-bottom: 20px;
}

.prose pre {
  background: var(--accent-dark);
  color: #f5f4ed;
  padding: 16px 20px;
  border-radius: 4px;
  overflow-x: auto;
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.6;
  margin-block: 24px;
}

.prose code {
  font-family: var(--mono);
  font-size: 0.9em;
  background: var(--highlight);
  padding: 2px 6px;
  border-radius: 2px;
}

.prose pre code {
  background: none;
  padding: 0;
  color: inherit;
}

.prose ul, .prose ol {
  padding-left: 24px;
  margin-bottom: 24px;
}

.prose li {
  margin-bottom: 8px;
}

.article-aside {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.aside-card {
  background: var(--card-bg);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 24px;
}

.aside-card h3 {
  font-size: 16px;
  margin-bottom: 14px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line);
}

.aside-card ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
  font-size: 13px;
}

.aside-card a:hover {
  color: var(--terracotta);
  text-decoration: underline;
}

/* Footer */
.footer {
  border-top: 1px solid var(--line);
  background: var(--card-bg);
  padding-block: 48px 36px;
  margin-top: 60px;
  font-size: 13px;
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 36px;
  margin-bottom: 36px;
}

.footer-top h4 {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--terracotta);
  margin-bottom: 14px;
}

.footer-top ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-top a:hover {
  color: var(--terracotta);
}

.footer-bottom {
  border-top: 1px solid var(--line);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--muted);
  font-size: 12px;
  flex-wrap: wrap;
  gap: 16px;
}

/* Breadcrumb */
.crumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 11px;
  color: var(--muted);
  padding-top: 24px;
}

.crumb a:hover {
  color: var(--terracotta);
}

/* Responsive */
@media (max-width: 900px) {
  .hero {
    grid-template-columns: 1fr;
    gap: 36px;
    padding-block: 40px 30px;
  }
  .calculator {
    grid-template-columns: 1fr;
  }
  .result-side {
    border-left: 0;
    border-top: 1px solid var(--line);
  }
  .article-layout {
    grid-template-columns: 1fr;
  }
  .footer-top {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 600px) {
  .header {
    height: auto;
    padding-block: 16px;
    flex-wrap: wrap;
    gap: 16px;
  }
  .header nav {
    order: 3;
    width: 100%;
    justify-content: space-between;
    gap: 12px;
  }
  .form-side, .result-side {
    padding: 24px 18px;
  }
  .form-grid {
    grid-template-columns: 1fr;
  }
  .appliance-head {
    display: none;
  }
  .appliance-row {
    grid-template-columns: 1fr 1fr;
    background: var(--paper);
    padding: 10px;
    border: 1px solid var(--line);
    border-radius: 4px;
  }
  .appliance-row input[type="text"] {
    grid-column: 1 / -1;
  }
  .footer-top {
    grid-template-columns: 1fr;
  }
}

/* Print Styles */
@media print {
  body {
    background: white;
    color: black;
    font-size: 10pt;
  }
  .header, .footer, .hero-actions, .presets-strip, .table-actions, .result-footer-actions, .btn-remove {
    display: none !important;
  }
  .calculator {
    border: 1px solid #333;
    box-shadow: none;
    display: block;
  }
  .form-side, .result-side {
    padding: 12pt;
    background: white;
  }
  .result-side {
    border-top: 1px solid #333;
    page-break-inside: avoid;
  }
  .main-result {
    font-size: 32pt;
  }
}