/* Sundial Heating & Cooling — mobile-first HVAC layout */
:root {
  --cs-copper: #c47d4a;
  --cs-copper-deep: #9e5f38;
  --cs-bg: #f7f5f2;
  --cs-white: #ffffff;
  --cs-panel: #ece8e3;
  --cs-ink: #1a2330;
  --cs-ink-soft: #2c3e50;
  --cs-gray: #5a6570;
  --cs-mute: #3d4854;
  --cs-slate: #1e2d3d;
  --cs-slate-mid: #2a3f54;
  --cs-glacier: #7eb8d4;
  --cs-glacier-pale: #a8d4e8;
  --cs-rule: #c5cdd6;
  --cs-focus: #2a5f7a;
  --cs-max: 76rem;
  --cs-display: "Segoe UI", system-ui, -apple-system, sans-serif;
  --cs-sans: system-ui, "Segoe UI", sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

body {
  margin: 0;
  overflow-x: hidden;
  overflow-x: clip;
  background: var(--cs-bg);
  color: var(--cs-ink);
  font: 1.0625rem/1.65 var(--cs-sans);
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--cs-ink-soft); }

a:focus-visible, button:focus-visible, summary:focus-visible,
.cs-cta:focus-visible, input:focus-visible, textarea:focus-visible {
  outline: 3px solid var(--cs-focus);
  outline-offset: 3px;
}

.cs-skip {
  position: absolute; left: 1rem; top: 1rem;
  width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0);
}
.cs-skip:focus {
  width: auto; height: auto; clip: auto; z-index: 100;
  background: var(--cs-slate); color: var(--cs-white);
  padding: 0.75rem 1rem; min-height: 44px;
  display: inline-flex; align-items: center;
  font-weight: 700;
}

.cs-utility {
  background: var(--cs-slate);
  color: var(--cs-glacier-pale);
  font-size: 0.65rem; font-weight: 800;
  letter-spacing: 0.22em; text-transform: uppercase;
  text-align: center; padding: 0.55rem 1rem;
  margin: 0;
  border-bottom: 3px solid var(--cs-copper);
  background-image:
    repeating-linear-gradient(
      90deg,
      transparent 0,
      transparent 14px,
      rgba(126, 184, 212, 0.12) 14px,
      rgba(126, 184, 212, 0.12) 15px
    ),
    linear-gradient(var(--cs-slate), var(--cs-slate));
}

.cs-masthead {
  display: grid;
  gap: 0.75rem;
  padding: 1rem 1.25rem 0.85rem;
  background: var(--cs-bg);
  border-bottom: 4px solid var(--cs-slate-mid);
  max-width: var(--cs-max);
  margin: 0 auto;
}

.cs-brand {
  font-family: var(--cs-display);
  font-size: clamp(1.35rem, 4.8vw, 1.85rem);
  font-weight: 800;
  text-decoration: none;
  color: var(--cs-ink);
  letter-spacing: -0.03em;
  line-height: 1.05;
  text-transform: none;
}
.cs-brand span {
  display: block;
  font-size: 0.42em;
  font-weight: 700;
  color: var(--cs-gray);
  letter-spacing: 0.2em;
  margin-top: 0.35rem;
  text-transform: uppercase;
}

.cs-nav-wrap { width: 100%; }

.cs-nav-mobile {
  margin: 0;
  padding: 0;
  border: none;
}

.cs-nav-mobile summary {
  list-style: none;
  cursor: pointer;
  min-height: 44px;
  min-width: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.65rem;
  padding: 0.55rem 0.9rem;
  border: 2px solid var(--cs-slate-mid);
  background: var(--cs-slate-mid);
  font-weight: 800;
  text-transform: uppercase;
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  color: var(--cs-white);
  user-select: none;
  -webkit-tap-highlight-color: transparent;
}
.cs-nav-mobile summary::-webkit-details-marker { display: none; }
.cs-nav-mobile[open] summary { border-bottom: none; }

@media (max-width: 719px) {
  .cs-masthead {
    grid-template-columns: 1fr auto;
    align-items: center;
    column-gap: 0.75rem;
  }
  .cs-brand { grid-column: 1; grid-row: 1; }
  .cs-nav-wrap {
    width: auto;
    grid-column: 2;
    grid-row: 1;
    justify-self: end;
    align-self: center;
  }
  .cs-masthead::after { grid-column: 1 / -1; }
  .cs-nav-mobile {
    position: relative;
    display: inline-block;
    width: auto;
    max-width: 100%;
  }
  .cs-nav-mobile[open] .cs-drawer {
    position: absolute;
    top: calc(100% + 0.35rem);
    right: 0;
    z-index: 30;
    min-width: 17rem;
    width: max(17rem, 100%);
  }
}

.cs-nav-mobile__bars {
  width: 1.35rem; height: 3px; background: var(--cs-glacier-pale);
  box-shadow: 0 7px 0 var(--cs-glacier-pale), 0 -7px 0 var(--cs-glacier-pale);
}

.cs-nav-mobile__close { display: none; }
.cs-nav-mobile[open] .cs-nav-mobile__open { display: none; }
.cs-nav-mobile[open] .cs-nav-mobile__close { display: inline; }

.cs-drawer {
  display: grid;
  gap: 0;
  padding: 0;
  border: 2px solid var(--cs-slate-mid);
  border-top: none;
  background: var(--cs-white);
}
.cs-drawer a {
  text-decoration: none;
  padding: 0.75rem 0.85rem;
  min-height: 44px;
  display: flex;
  align-items: center;
  font-weight: 700;
  font-size: 0.92rem;
  border-bottom: 1px solid var(--cs-rule);
  color: var(--cs-ink);
}
.cs-drawer a:last-child { border-bottom: none; }
.cs-drawer a:hover { background: var(--cs-panel); }

.cs-desktop-nav { display: none; }

.cs-nav a[aria-current="page"] {
  text-decoration: underline;
  text-decoration-color: var(--cs-copper);
  text-decoration-thickness: 3px;
  text-underline-offset: 0.28em;
}

.cs-page {
  max-width: var(--cs-max);
  margin: 0 auto;
  padding: 1.5rem 1.25rem 3rem;
}

.cs-label {
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--cs-copper-deep);
  margin: 0 0 0.5rem;
}

.cs-lede {
  font-size: 1.125rem;
  line-height: 1.6;
  color: var(--cs-mute);
  max-width: 40rem;
}

h1, h2, h3 {
  font-family: var(--cs-display);
  font-weight: 800;
  line-height: 1.1;
  color: var(--cs-ink);
  margin: 0 0 0.75rem;
  letter-spacing: -0.03em;
}
h1 { font-size: clamp(2rem, 7vw, 3.2rem); }
h2 { font-size: clamp(1.4rem, 4vw, 1.95rem); }
h3 { font-size: 1.1rem; font-weight: 700; }

.cs-cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.35rem;
}

.cs-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0.7rem 1.35rem;
  background: var(--cs-copper);
  color: var(--cs-white);
  font-weight: 800;
  text-decoration: none;
  border: 2px solid var(--cs-slate-mid);
  text-transform: uppercase;
  font-size: 0.82rem;
  letter-spacing: 0.06em;
  font-family: var(--cs-sans);
}
.cs-cta--ghost {
  background: var(--cs-white);
  color: var(--cs-ink);
}
.cs-cta--ink {
  background: var(--cs-slate);
  border-color: var(--cs-slate);
  color: var(--cs-white);
}

.cs-hero-home {
  display: grid;
  gap: 1.5rem;
  padding-bottom: 1.75rem;
  border-bottom: 3px solid var(--cs-slate-mid);
}

.cs-hero-home__visual { position: relative; }

.cs-hero-home__figure {
  margin: 0;
  background: var(--cs-slate);
  padding: 0;
  border: 3px solid var(--cs-slate-mid);
  position: relative;
  overflow: hidden;
}
.cs-hero-home__figure::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    repeating-linear-gradient(
      0deg,
      transparent 0,
      transparent 22px,
      rgba(126, 184, 212, 0.1) 22px,
      rgba(126, 184, 212, 0.1) 24px
    );
  pointer-events: none;
  z-index: 1;
}
.cs-hero-home__figure::after {
  content: "Supply · Return";
  position: absolute;
  top: 0.65rem;
  right: 0.65rem;
  font-size: 0.58rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  color: var(--cs-white);
  background: rgba(30, 45, 61, 0.82);
  padding: 0.25rem 0.45rem;
  z-index: 2;
  font-family: var(--cs-sans);
  text-transform: uppercase;
}
.cs-hero-home__figure img {
  width: 100%;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  object-position: 50% 40%;
}

.cs-hero-home__tick {
  margin-top: 0.85rem;
  padding: 0.85rem 1rem;
  background: var(--cs-slate);
  color: var(--cs-glacier-pale);
  font-size: 0.95rem;
  max-width: 26rem;
  border-left: 4px solid var(--cs-copper);
}

.cs-band {
  margin-top: 2.5rem;
  padding-top: 2rem;
  border-top: 2px solid var(--cs-rule);
}

.cs-band--grid {
  border-top: 5px solid var(--cs-glacier);
  background:
    linear-gradient(var(--cs-panel), var(--cs-panel)) padding-box,
    linear-gradient(180deg, rgba(30, 45, 61, 0.04), transparent 4rem);
}

.cs-band--inset {
  padding: 1.5rem 1.25rem;
  background: var(--cs-panel);
  border: 2px solid var(--cs-slate-mid);
}

.cs-band--perf {
  border-left: 5px solid var(--cs-glacier);
  padding-left: 1.25rem;
}

.cs-path-grid {
  display: grid;
  gap: 0;
  margin-top: 1.25rem;
  border: 2px solid var(--cs-slate-mid);
}

.cs-path-card {
  padding: 1.15rem 1.2rem 1.25rem;
  background: var(--cs-white);
  text-decoration: none;
  color: inherit;
  min-height: 44px;
  display: block;
  border-bottom: 2px solid var(--cs-slate-mid);
}
.cs-path-card:last-child { border-bottom: none; }
.cs-path-card:hover { background: #e4dfd8; }
.cs-path-card h3 { margin-bottom: 0.35rem; }

.cs-photo-card {
  margin: 0;
  background: var(--cs-white);
  border: 2px solid var(--cs-slate-mid);
  overflow: hidden;
}

.cs-crop {
  overflow: hidden;
  background: var(--cs-slate);
}
.cs-crop img {
  width: 100%;
  object-fit: cover;
}
.cs-crop--hero-main img { aspect-ratio: 4 / 5; object-position: 50% 40%; }
.cs-crop--furnace-wide img { aspect-ratio: 16 / 10; object-position: 50% 45%; }
.cs-crop--furnace-tall img { aspect-ratio: 3 / 4; object-position: 48% 42%; }
.cs-crop--pump-wide img { aspect-ratio: 16 / 9; object-position: 50% 48%; }
.cs-crop--pump-tall img { aspect-ratio: 3 / 4; object-position: 50% 50%; }
.cs-crop--filter-wide img { aspect-ratio: 16 / 10; object-position: 52% 46%; }
.cs-crop--filter-tall img { aspect-ratio: 4 / 5; object-position: 50% 44%; }

.cs-split {
  display: grid;
  gap: 1.5rem;
  align-items: start;
}

.cs-stack-list {
  margin: 0.75rem 0 0;
  padding-left: 1.25rem;
  color: var(--cs-mute);
}
.cs-stack-list li { margin-bottom: 0.55rem; }

.cs-steps {
  list-style: none;
  padding: 0;
  margin: 1rem 0 0;
  display: grid;
  gap: 0.65rem;
}
.cs-steps li {
  padding: 0.85rem 1rem;
  border-left: 5px solid var(--cs-glacier);
  background: var(--cs-white);
  border: 2px solid var(--cs-rule);
  border-left-width: 5px;
}

.cs-tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1rem;
}
.cs-tag {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0.45rem 0.85rem;
  border: 2px solid var(--cs-slate-mid);
  background: var(--cs-white);
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--cs-ink);
}
.cs-tag--copper { border-left: 5px solid var(--cs-copper); }
.cs-tag--glacier { border-left: 5px solid var(--cs-glacier); }
.cs-tag--slate { border-left: 5px solid var(--cs-slate); }

.cs-airflow-rule {
  height: 5px;
  margin: 1.25rem 0;
  background: repeating-linear-gradient(
    90deg,
    var(--cs-slate) 0,
    var(--cs-slate) 12px,
    var(--cs-bg) 12px,
    var(--cs-bg) 16px,
    var(--cs-glacier) 16px,
    var(--cs-glacier) 26px,
    var(--cs-bg) 26px,
    var(--cs-bg) 30px,
    var(--cs-copper) 30px,
    var(--cs-copper) 40px
  );
  border: 1px solid var(--cs-slate-mid);
}

.cs-grid-num {
  font-family: var(--cs-display);
  font-size: clamp(3.2rem, 12vw, 5.5rem);
  font-weight: 800;
  line-height: 0.85;
  color: var(--cs-glacier);
  opacity: 0.35;
  margin: 0;
  letter-spacing: -0.04em;
}

.cs-page-title-bar {
  padding-bottom: 1.25rem;
  border-bottom: 3px solid var(--cs-slate-mid);
  margin-bottom: 0.5rem;
}

.cs-page-hero-split {
  display: grid;
  gap: 1.25rem;
  padding-bottom: 1.5rem;
  border-bottom: 3px solid var(--cs-slate-mid);
  margin-bottom: 0.5rem;
}

.cs-duct-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 0.25rem;
  max-width: 6.5rem;
  margin-bottom: 0.75rem;
}
.cs-duct-grid span {
  aspect-ratio: 1;
  background: var(--cs-slate-mid);
  border: 1px solid var(--cs-glacier);
  opacity: 0.55;
}
.cs-duct-grid span:nth-child(odd) { background: var(--cs-glacier); opacity: 0.4; }

.cs-temp-ladder {
  margin: 1rem 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.5rem;
}
.cs-temp-ladder li {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.65rem 0.85rem;
  border: 2px solid var(--cs-rule);
  background: var(--cs-white);
  min-height: 44px;
  font-size: 0.95rem;
  color: var(--cs-mute);
}
.cs-temp-ladder__mark {
  width: 2.5rem;
  height: 1.25rem;
  flex-shrink: 0;
  border: 2px solid var(--cs-slate-mid);
  font-size: 0.58rem;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--cs-sans);
  background: var(--cs-panel);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.cs-dept-cards {
  display: grid;
  gap: 0.65rem;
  margin-top: 1rem;
}
.cs-dept-cards article {
  padding: 1rem 1.1rem;
  border: 2px solid var(--cs-rule);
  background: var(--cs-white);
}
.cs-dept-cards h3 { margin-bottom: 0.35rem; font-size: 1rem; }
.cs-dept-cards p { margin: 0; color: var(--cs-mute); font-size: 0.98rem; }

.cs-service-timeline {
  counter-reset: svcstep;
  list-style: none;
  padding: 0;
  margin: 1rem 0 0;
  display: grid;
  gap: 0.75rem;
}
.cs-service-timeline li {
  position: relative;
  padding: 1rem 1rem 1rem 3.25rem;
  border: 2px solid var(--cs-rule);
  background: var(--cs-white);
}
.cs-service-timeline li::before {
  counter-increment: svcstep;
  content: counter(svcstep, decimal-leading-zero);
  position: absolute;
  left: 0.85rem;
  top: 1rem;
  font-family: var(--cs-display);
  font-weight: 800;
  color: var(--cs-copper);
  font-size: 1.05rem;
}

.cs-contact-fields {
  margin: 0.75rem 0 0;
  padding-left: 1.1rem;
  max-width: 40rem;
}
.cs-contact-fields li { margin-bottom: 0.6rem; color: var(--cs-mute); }

.cs-form-note {
  font-size: 0.95rem;
  color: var(--cs-gray);
  margin: 0 0 1rem;
  font-weight: 600;
}

.cs-demo-form {
  display: grid;
  gap: 0.85rem;
  max-width: 28rem;
  padding: 1.1rem 1.15rem;
  border: 2px solid var(--cs-slate-mid);
  background: var(--cs-panel);
}
.cs-demo-form label {
  display: block;
  font-size: 0.82rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 0.35rem;
}
.cs-demo-form input,
.cs-demo-form textarea,
.cs-demo-form select {
  width: 100%;
  min-height: 44px;
  padding: 0.55rem 0.65rem;
  border: 2px solid var(--cs-slate-mid);
  font: inherit;
  background: var(--cs-white);
}
.cs-demo-form textarea { min-height: 6rem; resize: vertical; }
.cs-demo-form button {
  min-height: 44px;
  padding: 0.65rem 1.25rem;
  background: var(--cs-gray);
  color: var(--cs-white);
  border: 2px solid var(--cs-slate-mid);
  font-weight: 800;
  text-transform: uppercase;
  cursor: not-allowed;
}

details {
  border: 2px solid var(--cs-rule);
  padding: 0.75rem 1rem;
  background: var(--cs-white);
  margin-top: 0.65rem;
}
details summary {
  cursor: pointer;
  font-weight: 800;
  text-transform: uppercase;
  font-size: 0.88rem;
  letter-spacing: 0.04em;
  min-height: 44px;
  display: flex;
  align-items: center;
  font-family: var(--cs-sans);
}

.cs-footer {
  max-width: var(--cs-max);
  margin: 0 auto;
  padding: 2rem 1.25rem 2.5rem;
  border-top: 4px solid var(--cs-slate-mid);
  background: var(--cs-slate);
  color: var(--cs-white);
}
.cs-disclosure {
  font-size: 0.92rem;
  color: var(--cs-glacier-pale);
  margin: 0 0 1.25rem;
  font-weight: 700;
}
.cs-footer-nav__label {
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--cs-glacier);
  margin: 0 0 0.5rem;
  font-weight: 800;
}
.cs-footer-nav__list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 0.35rem;
}
.cs-footer-nav a {
  text-decoration: none;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  color: var(--cs-white);
  font-weight: 600;
}
.cs-footer-nav a:hover { color: var(--cs-glacier-pale); }

.cs-masthead::after {
  content: "";
  display: block;
  height: 4px;
  margin-top: 0.15rem;
  background: repeating-linear-gradient(
    90deg,
    var(--cs-copper) 0,
    var(--cs-copper) 18px,
    var(--cs-glacier) 18px,
    var(--cs-glacier) 22px,
    var(--cs-slate) 22px,
    var(--cs-slate) 42px
  );
  grid-column: 1 / -1;
}
.cs-colophon {
  margin: 1.5rem 0 0;
  font-size: 0.88rem;
  color: rgba(255, 255, 255, 0.55);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-weight: 700;
  font-family: var(--cs-sans);
}

@media (min-width: 720px) {
  .cs-nav-mobile { display: none; }
  .cs-desktop-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 0.25rem 0.65rem;
    align-items: center;
    justify-content: flex-end;
  }
  .cs-desktop-nav a {
    text-decoration: none;
    font-size: 0.72rem;
    font-weight: 800;
    padding: 0.45rem 0.1rem;
    min-height: 44px;
    display: inline-flex;
    align-items: center;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--cs-ink);
  }
  .cs-masthead {
    grid-template-columns: 1fr auto;
    align-items: end;
  }
  .cs-path-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .cs-path-card { border-bottom: none; border-right: 2px solid var(--cs-slate-mid); }
  .cs-path-card:nth-child(3n) { border-right: none; }
  .cs-path-grid .cs-path-card:nth-last-child(-n+3):nth-child(3n+1),
  .cs-path-grid .cs-path-card:nth-last-child(-n+2):nth-child(3n+2),
  .cs-path-grid .cs-path-card:nth-last-child(-n+1):nth-child(3n) { border-bottom: none; }
  .cs-split { grid-template-columns: 1fr 1fr; }
  .cs-hero-home { grid-template-columns: 1.05fr 0.95fr; align-items: start; gap: 2rem; }
  .cs-hero-home__figure img { aspect-ratio: 3 / 4; }
  .cs-page-hero-split { grid-template-columns: 1.1fr 0.9fr; align-items: end; }
  .cs-footer-nav__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.35rem 1rem;
  }
  .cs-dept-cards { grid-template-columns: 1fr 1fr; }
}

@media (min-width: 1024px) {
  .cs-page { padding: 2rem 2rem 3.5rem; }
  .cs-path-grid--quad { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}