/* ============================================================
   DropSite #001 — HVAC Business Website
   Archetype: Swiss Grid Precision (see web-design-archetypes)
   Fixed system — do not restyle per customer. Brand Pack swaps
   the accent color and logo via config.js only.
   ============================================================ */
:root {
  --paper: #FFFFFF;
  --ink: #111111;
  --panel: #F2F2F0;
  --accent: #0B4FD4;          /* Klein blue — overridable by config.js */
  --muted: #5c5c5c;
  --rule: #111111;
  --font-head: 'Archivo', sans-serif;
  --font-body: 'IBM Plex Sans', sans-serif;
  --font-mono: 'IBM Plex Mono', monospace;
}
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; }

/* ---------- Layout shell ---------- */
.container { max-width: 1160px; margin: 0 auto; padding: 0 24px; }
.grid-lines {
  background-image: repeating-linear-gradient(to right, transparent, transparent calc(100%/12 - 1px), rgba(17,17,17,.07) calc(100%/12 - 1px), rgba(17,17,17,.07) calc(100%/12));
}

/* ---------- Type ---------- */
h1, h2, h3 { font-family: var(--font-head); font-weight: 700; letter-spacing: -0.015em; line-height: 1.05; }
h1 { font-size: clamp(2.6rem, 6vw, 5rem); }
h2 { font-size: clamp(1.9rem, 4vw, 3rem); }
h3 { font-size: clamp(1.15rem, 2vw, 1.5rem); }
.label {
  font-family: var(--font-mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--ink);
}
.label-accent { color: var(--accent); }
.lede { font-size: 18px; max-width: 620px; }

/* ---------- Header / nav ---------- */
header.site {
  border-bottom: 1px solid var(--rule);
  position: sticky; top: 0; z-index: 50;
  background: var(--paper);
}
.nav {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 0; gap: 16px;
}
.brand {
  display: flex; align-items: center; gap: 12px;
  text-decoration: none; font-family: var(--font-head); font-weight: 700;
  font-size: 1.05rem; letter-spacing: -0.01em; text-transform: uppercase;
}
.brand .mark {
  width: 34px; height: 34px; background: var(--accent); color: var(--paper);
  display: grid; place-items: center; font-family: var(--font-mono); font-size: 13px;
}
.nav-links { display: flex; gap: 22px; align-items: center; }
.nav-links a {
  text-decoration: none; font-family: var(--font-mono); font-size: 12px;
  text-transform: uppercase; letter-spacing: 0.1em; padding-bottom: 2px;
  border-bottom: 1px solid transparent;
}
.nav-links a:hover, .nav-links a:focus-visible { border-bottom-color: var(--ink); }
.nav-phone { font-family: var(--font-mono); font-size: 13px; text-decoration: none; }

/* ---------- Buttons (hard edges, invert on hover) ---------- */
.btn {
  display: inline-block; font-family: var(--font-mono); font-size: 13px;
  text-transform: uppercase; letter-spacing: 0.1em; text-decoration: none;
  padding: 15px 26px; border: 1px solid var(--ink); background: var(--accent);
  color: var(--paper); cursor: pointer; transition: background .18s ease, color .18s ease;
}
.btn:hover, .btn:focus-visible { background: var(--ink); color: var(--paper); outline: none; }
.btn-ghost { background: transparent; color: var(--ink); }
.btn-ghost:hover, .btn-ghost:focus-visible { background: var(--ink); color: var(--paper); }
.btn-row { display: flex; gap: 14px; flex-wrap: wrap; }

/* ---------- Hero (typographic poster) ---------- */
.hero { border-bottom: 1px solid var(--rule); position: relative; }
.hero-meta {
  display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap;
  padding: 14px 0; border-bottom: 1px solid var(--rule);
}
.hero-body { padding: 72px 0 64px; }
.hero h1 { text-transform: uppercase; max-width: 15ch; }
.hero h1 .em { color: var(--accent); }
.hero .lede { margin: 28px 0 34px; }
.hero-index {
  position: absolute; right: 24px; bottom: 24px;
  font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--muted); text-align: right;
}

/* ---------- Numbered sections ---------- */
section.block { border-bottom: 1px solid var(--rule); padding: 72px 0; }
.sec-head {
  display: flex; align-items: baseline; gap: 18px; flex-wrap: wrap;
  border-bottom: 1px solid var(--rule); padding-bottom: 14px; margin-bottom: 36px;
}
.sec-num {
  font-family: var(--font-mono); font-size: 13px; letter-spacing: 0.12em;
  background: var(--ink); color: var(--paper); padding: 4px 10px;
}

/* ---------- Service grid (tabular blocks) ---------- */
.svc-grid { display: grid; grid-template-columns: repeat(2, 1fr); border-top: 1px solid var(--rule); border-left: 1px solid var(--rule); }
.svc {
  border-right: 1px solid var(--rule); border-bottom: 1px solid var(--rule);
  padding: 28px; text-decoration: none; display: block;
  transition: background .18s ease, color .18s ease;
}
.svc:hover, .svc:focus-visible { background: var(--accent); color: var(--paper); outline: none; }
.svc:hover .label, .svc:focus-visible .label { color: var(--paper); }
.svc h3 { margin: 10px 0 8px; }
.svc p { font-size: 15px; }
.svc .go { font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.12em; text-transform: uppercase; margin-top: 14px; display: inline-block; }

/* ---------- Process (numbered table) ---------- */
.steps { border-top: 1px solid var(--rule); }
.step {
  display: grid; grid-template-columns: 80px 1fr 1.2fr; gap: 20px;
  border-bottom: 1px solid var(--rule); padding: 20px 0; align-items: baseline;
}
.step .n { font-family: var(--font-mono); font-size: 13px; color: var(--accent); letter-spacing: 0.12em; }
.step h3 { font-size: 1.1rem; }
.step p { font-size: 15px; color: var(--muted); }

/* ---------- Stats (tabular counters) ---------- */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); border: 1px solid var(--rule); }
.stat { padding: 28px 20px; border-right: 1px solid var(--rule); }
.stat:last-child { border-right: none; }
.stat .num {
  font-family: var(--font-head); font-weight: 700;
  font-size: clamp(2.1rem, 4vw, 3.2rem); line-height: 1; letter-spacing: -0.02em;
}
.stat .num .suffix { color: var(--accent); }
.stat .cap { font-family: var(--font-mono); font-size: 11px; text-transform: uppercase; letter-spacing: 0.12em; color: var(--muted); margin-top: 8px; }

/* ---------- Reviews ---------- */
.reviews { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0; border-top: 1px solid var(--rule); border-left: 1px solid var(--rule); }
.review { border-right: 1px solid var(--rule); border-bottom: 1px solid var(--rule); padding: 24px; }
.review .stars { color: var(--accent); font-family: var(--font-mono); letter-spacing: 0.2em; font-size: 13px; }
.review blockquote { margin: 12px 0; font-size: 15px; }
.review cite { font-family: var(--font-mono); font-size: 11px; text-transform: uppercase; letter-spacing: 0.1em; color: var(--muted); font-style: normal; }

/* ---------- Areas ---------- */
.areas { display: flex; flex-wrap: wrap; gap: 10px; }
.area {
  font-family: var(--font-mono); font-size: 12px; text-transform: uppercase;
  letter-spacing: 0.1em; border: 1px solid var(--rule); padding: 10px 16px;
}

/* ---------- FAQ ---------- */
.faq-item { border-top: 1px solid var(--rule); }
.faq-item:last-child { border-bottom: 1px solid var(--rule); }
.faq-item summary {
  cursor: pointer; list-style: none; padding: 18px 0;
  font-family: var(--font-head); font-weight: 600; font-size: 1.05rem;
  display: flex; justify-content: space-between; gap: 16px;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; font-family: var(--font-mono); }
.faq-item[open] summary::after { content: "–"; }
.faq-item .a { padding: 0 0 18px; font-size: 15px; color: var(--muted); max-width: 760px; }

/* ---------- CTA band ---------- */
.cta-band { background: var(--ink); color: var(--paper); border-bottom: 1px solid var(--rule); padding: 72px 0; }
.cta-band h2 { text-transform: uppercase; max-width: 18ch; }
.cta-band .lede { color: rgba(242,242,240,.75); margin: 22px 0 32px; }
.cta-band .btn { border-color: var(--paper); background: var(--accent); }
.cta-band .btn:hover, .cta-band .btn:focus-visible { background: var(--paper); color: var(--ink); }
.cta-band .btn-ghost { background: transparent; color: var(--paper); }
.cta-band .btn-ghost:hover { background: var(--paper); color: var(--ink); }

/* ---------- Footer (NAP) ---------- */
footer.site { padding: 56px 0 40px; }
.foot-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 32px; border-top: 1px solid var(--rule); padding-top: 32px; }
.foot-grid h4 { font-family: var(--font-mono); font-size: 11px; text-transform: uppercase; letter-spacing: 0.14em; color: var(--muted); margin-bottom: 12px; font-weight: 500; }
.foot-grid p, .foot-grid li { font-size: 14px; }
.foot-grid ul { list-style: none; }
.foot-grid a { text-decoration: none; border-bottom: 1px solid transparent; }
.foot-grid a:hover { border-bottom-color: var(--ink); }
.legal { margin-top: 36px; font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted); }

/* ---------- Forms (Swiss: mono labels, hard edges) ---------- */
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; max-width: 760px; }
.field { display: flex; flex-direction: column; gap: 8px; }
.field.full { grid-column: 1 / -1; }
.field label { font-family: var(--font-mono); font-size: 12px; text-transform: uppercase; letter-spacing: 0.12em; }
.field input, .field select, .field textarea {
  font-family: var(--font-body); font-size: 16px; padding: 13px 14px;
  border: 1px solid var(--rule); border-radius: 0; background: var(--paper); color: var(--ink);
}
.field input:focus, .field select:focus, .field textarea:focus {
  outline: 2px solid var(--accent); outline-offset: 1px;
}
.form-note { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted); margin-top: 16px; }

/* ---------- Mobile call bar ---------- */
.call-bar { display: none; }
@media (max-width: 820px) {
  .nav-links { display: none; }
  .svc-grid, .reviews { grid-template-columns: 1fr; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .stat:nth-child(2n) { border-right: none; }
  .stat:nth-child(-n+2) { border-bottom: 1px solid var(--rule); }
  .step { grid-template-columns: 48px 1fr; }
  .step p { grid-column: 2; }
  .form-grid, .foot-grid { grid-template-columns: 1fr; }
  .hero-meta { flex-direction: column; gap: 6px; }
  .hero-meta .label { font-size: 11px; letter-spacing: 0.08em; overflow-wrap: anywhere; }
  .nav { gap: 8px; }
  .nav-phone { font-size: 12px; white-space: nowrap; }
  .brand span[data-var="company"] { font-size: 0.82rem; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; max-width: 150px; display: inline-block; }
  .hero-index { display: none; }
  .hero-body { padding: 48px 0 40px; }
  section.block { padding: 48px 0; }
  .call-bar {
    display: flex; position: fixed; left: 0; right: 0; bottom: 0; z-index: 60;
    border-top: 1px solid var(--rule);
  }
  .call-bar a {
    flex: 1; text-align: center; padding: 15px 8px; text-decoration: none;
    font-family: var(--font-mono); font-size: 12px; text-transform: uppercase; letter-spacing: 0.1em;
    background: var(--accent); color: var(--paper);
  }
  .call-bar a.quote { background: var(--ink); }
  body { padding-bottom: 52px; }
}

/* ---------- Motion: mechanical reveals ---------- */
.reveal { opacity: 0; transform: translateY(14px); transition: opacity .4s ease-out, transform .4s ease-out; }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}