:root {
  /* surfaces */
  --color-bg: #eef2f3;
  --color-surface: #ffffff;
  --color-panel: #dfe7ea;
  --color-ink: #13212b;
  --color-ink-soft: #3f505c;
  --color-line: #c3cfd4;
  --color-on-dark: #f4f7f8;
  --color-on-dark-soft: #c9d6dc;
  --color-dark: #16303f;

  /* meaning colors: cool = cooling load, warm = heating load */
  --color-cool: #1d5f99;
  --color-cool-tint: #d6e6f3;
  --color-warm: #a5421a;
  --color-warm-tint: #f4e0d6;
  --color-mild: #6b7a84;
  --color-mild-tint: #e3e8ea;
  --color-star: #8a5a00;

  --color-shadow: rgba(19, 33, 43, 0.12);
  --color-focus: #1d5f99;

  --font-body: "Avenir Next", "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  --font-display: "Avenir Next Condensed", "Arial Narrow", "Roboto Condensed", "Helvetica Neue", sans-serif;

  --r-sm: 8px;
  --r-md: 14px;
  --r-lg: 22px;
  --wrap: 1120px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: var(--color-cool); }
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible, select:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: 2px;
}
.wrap { width: min(var(--wrap), 100% - 40px); margin-inline: auto; }

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.01em;
  margin: 0;
}
h1 { font-size: clamp(2.5rem, 6vw, 4.4rem); }
h2 { font-size: clamp(1.9rem, 3.6vw, 2.8rem); }
h3 { font-size: 1.35rem; line-height: 1.15; }
p { margin: 0; }
.lede { margin-top: 14px; font-size: 1.12rem; color: var(--color-ink-soft); max-width: 46ch; }
.sub { margin-top: 12px; color: var(--color-ink-soft); max-width: 60ch; }

/* ---------- header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 20;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-line);
}
.site-header .wrap {
  display: flex; align-items: center; gap: 22px;
  min-height: 68px;
}
.head-phone {
  display: inline-flex; align-items: center;
  min-height: 40px; padding: 0 14px;
  border-radius: var(--r-sm);
  background: var(--color-cool);
  color: var(--color-on-dark);
  font-weight: 700; text-decoration: none;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}
.head-phone:hover { background: var(--color-dark); }
.wordmark {
  font-family: var(--font-display);
  font-weight: 700; font-size: 1.25rem;
  color: var(--color-ink); text-decoration: none;
  line-height: 1.1;
}
.wordmark small { display: block; font-family: var(--font-body); font-weight: 500; font-size: .78rem; color: var(--color-ink-soft); }
.site-nav { margin-left: auto; display: flex; gap: 4px; }
.site-nav a {
  display: inline-flex; align-items: center;
  min-height: 40px; padding: 0 14px;
  border-radius: var(--r-sm);
  color: var(--color-ink); text-decoration: none; font-weight: 600;
}
.site-nav a:hover { background: var(--color-panel); }
.site-nav a[aria-current="page"] { background: var(--color-panel); color: var(--color-cool); }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 48px; padding: 0 22px;
  border-radius: var(--r-md);
  font-weight: 700; text-decoration: none; border: 2px solid transparent;
  cursor: pointer; font-size: 1rem; font-family: var(--font-body);
}
.btn-primary { background: var(--color-cool); color: var(--color-on-dark); }
.btn-primary:hover { background: var(--color-dark); }
.btn-ghost { border-color: var(--color-ink); color: var(--color-ink); background: transparent; }
.btn-ghost:hover { background: var(--color-ink); color: var(--color-on-dark); }
.btn-row { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }

/* ---------- hero ---------- */
.hero { padding: 56px 0 72px; }
.hero-grid {
  display: grid; grid-template-columns: 1.15fr .85fr; gap: 48px; align-items: center;
}
.hero h1 .split-cool { color: var(--color-cool); }
.hero h1 .split-warm { color: var(--color-warm); }
.rating {
  display: inline-flex; align-items: center; gap: 10px;
  margin-top: 24px; padding: 8px 14px;
  border-radius: var(--r-sm);
  background: var(--color-surface); border: 1px solid var(--color-line);
  font-weight: 600;
}
.rating .stars { color: var(--color-star); letter-spacing: 2px; }
.photo-fig { margin: 0; }
.photo-fig img {
  border-radius: var(--r-lg);
  aspect-ratio: 4 / 5; object-fit: cover; width: 100%; height: auto;
  box-shadow: 0 18px 40px var(--color-shadow);
}
.photo-fig figcaption { margin-top: 10px; font-size: .92rem; color: var(--color-ink-soft); }
.stock-label { display: block; margin-top: 2px; font-size: .78rem; color: var(--color-ink-soft); font-style: italic; }

/* ---------- about ---------- */
.about { padding: 72px 0; background: var(--color-surface); border-block: 1px solid var(--color-line); }
.about-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: 48px; align-items: start; }
.about-copy p + p { margin-top: 14px; }
.fact-list { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--color-line); }
.fact-list li {
  display: grid; grid-template-columns: 9.5rem 1fr; gap: 16px;
  padding: 14px 0; border-bottom: 1px solid var(--color-line);
}
.fact-list dt, .fact-list .k { font-weight: 700; }
.fact-list .v { color: var(--color-ink-soft); }
.fact-list .v a { font-weight: 700; }

/* ---------- season chart (signature) ---------- */
.season { padding: 80px 0; }
.chart {
  margin-top: 36px; padding: 28px 24px 20px;
  background: var(--color-surface); border-radius: var(--r-lg);
  border: 1px solid var(--color-line);
}
.bars {
  display: grid; grid-template-columns: repeat(12, 1fr); gap: 8px;
  align-items: end; height: 260px;
}
.bar { display: flex; flex-direction: column; justify-content: flex-end; height: 100%; text-align: center; }
.bar .fill {
  height: calc((var(--t) - 40) / 55 * 100%);
  border-radius: var(--r-sm) var(--r-sm) 4px 4px;
  background: var(--color-mild-tint);
  border: 2px solid var(--color-mild);
  position: relative;
}
.bar.cool .fill { background: var(--color-cool-tint); border-color: var(--color-cool); }
.bar.warm .fill { background: var(--color-warm-tint); border-color: var(--color-warm); }
.bar .temp { font-size: .82rem; font-weight: 700; font-variant-numeric: tabular-nums; margin-bottom: 4px; }
.bar .mo { margin-top: 8px; font-size: .82rem; font-weight: 600; color: var(--color-ink-soft); }
.bar.tune .mo {
  color: var(--color-on-dark); background: var(--color-ink);
  border-radius: 6px; padding: 1px 0;
}
.legend { display: flex; flex-wrap: wrap; gap: 10px 22px; margin-top: 22px; font-size: .92rem; }
.legend span { display: inline-flex; align-items: center; gap: 8px; }
.swatch { width: 16px; height: 16px; border-radius: 4px; border: 2px solid; }
.swatch.cool { background: var(--color-cool-tint); border-color: var(--color-cool); }
.swatch.warm { background: var(--color-warm-tint); border-color: var(--color-warm); }
.swatch.mild { background: var(--color-mild-tint); border-color: var(--color-mild); }
.swatch.tune { background: var(--color-ink); border-color: var(--color-ink); }
.source { margin-top: 12px; font-size: .8rem; color: var(--color-ink-soft); }
.season-notes { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-top: 24px; }
.note {
  padding: 22px; border-radius: var(--r-md);
  border-left: 6px solid var(--color-mild);
  background: var(--color-surface);
}
.note.cool { border-left-color: var(--color-cool); }
.note.warm { border-left-color: var(--color-warm); }
.note p { margin-top: 8px; color: var(--color-ink-soft); }

/* ---------- symptom table ---------- */
.symptoms { padding: 72px 0; background: var(--color-surface); border-block: 1px solid var(--color-line); }
.sym-list { list-style: none; margin: 32px 0 0; padding: 0; }
.sym-list li {
  display: grid; grid-template-columns: 2.4rem 1fr 1.3fr; gap: 20px; align-items: baseline;
  padding: 20px 0; border-top: 1px solid var(--color-line);
}
.sym-list li:last-child { border-bottom: 1px solid var(--color-line); }
.sym-tag {
  display: inline-flex; align-items: center; justify-content: center;
  width: 2.4rem; height: 1.6rem; border-radius: 6px;
  font-size: .75rem; font-weight: 800; color: var(--color-on-dark);
  background: var(--color-mild);
}
.sym-tag.cool { background: var(--color-cool); }
.sym-tag.warm { background: var(--color-warm); }
.sym-list h3 { font-size: 1.2rem; }
.sym-list p { color: var(--color-ink-soft); }
.more-link { margin-top: 24px; }

/* ---------- call prep ---------- */
.prep { padding: 72px 0; }
.prep-grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: 48px; }
.steps { counter-reset: step; list-style: none; margin: 0; padding: 0; }
.steps li {
  counter-increment: step;
  display: grid; grid-template-columns: 2.6rem 1fr; gap: 16px;
  padding-bottom: 22px; position: relative;
}
.steps li::before {
  content: counter(step);
  display: inline-flex; align-items: center; justify-content: center;
  width: 2.6rem; height: 2.6rem; border-radius: 50%;
  background: var(--color-ink); color: var(--color-on-dark); font-weight: 800;
}
.steps li:not(:last-child)::after {
  content: ""; position: absolute; left: calc(1.3rem - 1px); top: 2.8rem; bottom: 4px;
  width: 2px; background: var(--color-line);
}
.steps h3 { font-size: 1.15rem; margin-top: 8px; }
.steps p { margin-top: 6px; color: var(--color-ink-soft); }

/* ---------- close band ---------- */
.close {
  background: var(--color-dark); color: var(--color-on-dark);
  padding: 64px 0;
}
.close-grid { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 24px; }
.close p { margin-top: 10px; color: var(--color-on-dark-soft); }
.close .big-phone {
  display: inline-flex; align-items: center; min-height: 64px; padding: 0 28px;
  border-radius: var(--r-lg);
  background: var(--color-on-dark); color: var(--color-dark);
  font-family: var(--font-display); font-weight: 700; font-size: clamp(1.6rem, 4vw, 2.3rem);
  text-decoration: none; font-variant-numeric: tabular-nums;
}
.close .big-phone:hover { background: var(--color-cool-tint); }

.site-footer { padding: 28px 0; font-size: .9rem; color: var(--color-ink-soft); }
.site-footer .wrap { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px; }
.site-footer a { display: inline-flex; align-items: center; min-height: 34px; color: var(--color-ink); }

/* ---------- inner pages ---------- */
.page-head { padding: 56px 0 36px; }
.svc-group { padding: 40px 0 56px; }
.svc-group + .svc-group { border-top: 1px solid var(--color-line); }
.svc-head { display: flex; align-items: baseline; gap: 14px; flex-wrap: wrap; }
.svc-head .sym-tag { position: relative; top: -4px; }
.svc-rows { margin-top: 24px; display: grid; gap: 14px; }
.svc-row {
  display: grid; grid-template-columns: 1fr 1.4fr; gap: 24px;
  padding: 22px 24px; border-radius: var(--r-md);
  background: var(--color-surface); border: 1px solid var(--color-line);
}
.svc-row h3 { font-size: 1.2rem; }
.svc-row p { color: var(--color-ink-soft); }
.scope-note {
  margin-top: 8px; padding: 18px 20px; border-radius: var(--r-md);
  background: var(--color-panel); color: var(--color-ink);
}

.contact-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: 48px; align-items: start; padding-bottom: 72px; }
.contact-card {
  padding: 28px; border-radius: var(--r-lg);
  background: var(--color-surface); border: 1px solid var(--color-line);
}
.contact-card .phone-xl {
  display: inline-flex; align-items: center; min-height: 56px;
  font-family: var(--font-display); font-weight: 700; font-size: clamp(1.8rem, 5vw, 2.6rem);
  color: var(--color-cool); text-decoration: none; font-variant-numeric: tabular-nums;
}
.contact-card .phone-label { color: var(--color-ink-soft); margin-top: 4px; }
.contact-card .btn-row { margin-top: 18px; }
.contact-card .fact-list { margin-top: 24px; }
form .field { margin-bottom: 16px; }
form label { display: block; font-weight: 700; margin-bottom: 6px; }
form input, form textarea, form select {
  width: 100%; min-height: 48px; padding: 10px 14px;
  border-radius: var(--r-sm); border: 1.5px solid var(--color-line);
  background: var(--color-surface); color: var(--color-ink);
  font: inherit;
}
form textarea { min-height: 130px; resize: vertical; }
.form-note { margin-top: 12px; font-size: .88rem; color: var(--color-ink-soft); }

/* ---------- motion ---------- */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity .55s ease, transform .55s ease; }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal, .reveal.in { opacity: 1; transform: none; transition: none; }
}

/* ---------- responsive ---------- */
@media (max-width: 900px) {
  .hero-grid, .about-grid, .prep-grid, .contact-grid { grid-template-columns: 1fr; gap: 32px; }
  .photo-fig img { aspect-ratio: 4 / 3; }
  .season-notes { grid-template-columns: 1fr; }
  .svc-row { grid-template-columns: 1fr; gap: 8px; }
}
@media (max-width: 700px) {
  body { font-size: 16px; }
  .site-header .wrap { flex-wrap: wrap; gap: 8px 14px; padding: 10px 0; }
  .site-nav { margin-left: 0; width: 100%; justify-content: space-between; border-top: 1px solid var(--color-line); padding-top: 6px; }
  .site-nav a { padding: 0 10px; }
  .hero { padding: 36px 0 48px; }
  .about, .symptoms, .prep, .season { padding: 56px 0; }
  .chart { padding: 20px 10px 16px; }
  .bars { gap: 3px; height: 210px; }
  .bar .temp { font-size: .68rem; }
  .bar .mo { font-size: .7rem; }
  .sym-list li { grid-template-columns: 2.4rem 1fr; gap: 6px 14px; }
  .sym-list li p { grid-column: 2; }
  .fact-list li { grid-template-columns: 1fr; gap: 2px; }
  .close { padding: 48px 0; }
}
.fact-list.spaced { margin-top: 24px; }
.form-sub { margin-bottom: 20px; }
.fact-list .v a, .scope-note a { display: inline-flex; align-items: center; min-height: 34px; }