/* ===== /trades/hvac — Trade leaf-menu page ===== */

/* Design tokens for the HVAC page — steel blue + warm copper */
:root {
  --steel-blue: #2E5A7A;
  --steel-light: #4A7BA7;
  --copper: #D4845C;
  --copper-deep: #A0622E;
  --slate: #3B4A57;
  --cream-paper: #F5EFE4;
  --cream-deep: #EDE4D4;
  --espresso-deep: #100E0B;
}

.hvac-page { position: relative; z-index: 2; }

/* ---------- HERO ---------- */
.hvac-hero {
  position: relative;
  padding: 56px 0 0;
}
.hvac-hero .crumbs {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: "JetBrains Mono", monospace;
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-mute);
  margin-bottom: 36px;
}
.hvac-hero .crumbs a { color: var(--ink-mute); text-decoration: none; }
.hvac-hero .crumbs a:hover { color: var(--steel-blue); }
.hvac-hero .crumbs .sep { opacity: 0.45; }
.hvac-hero .crumbs .here { color: var(--ink); }

.hvac-hero-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 72px;
  align-items: end;
  padding-bottom: 32px;
}
.hvac-hero h1 {
  font-family: "Playfair Display", serif;
  font-weight: 400;
  font-size: clamp(64px, 8.5vw, 128px);
  line-height: 0.94;
  margin: 0;
  letter-spacing: -0.025em;
  color: var(--ink);
}
.hvac-hero h1 em { font-style: italic; color: var(--steel-blue); }

.hvac-hero .right-col {
  display: flex;
  flex-direction: column;
  gap: 24px;
  padding-bottom: 8px;
}
.hvac-hero .lede {
  font-family: "Playfair Display", serif;
  font-style: italic;
  font-size: 22px;
  line-height: 1.45;
  color: var(--ink-soft);
  margin: 0;
  border-left: 2px solid var(--copper);
  padding-left: 18px;
  max-width: 36ch;
}

.hvac-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  margin-top: 8px;
}
.hvac-stats .stat {
  padding: 22px 0;
  border-right: 1px solid var(--rule);
}
.hvac-stats .stat:last-child { border-right: none; }
.hvac-stats .stat .n {
  font-family: "Playfair Display", serif;
  font-style: italic;
  font-weight: 400;
  font-size: clamp(32px, 3.5vw, 44px);
  color: var(--ink);
  line-height: 1;
  letter-spacing: -0.01em;
}
.hvac-stats .stat .l {
  display: block;
  font-family: "JetBrains Mono", monospace;
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-mute);
  margin-top: 8px;
}
.hvac-stats .stat .l .dot { color: var(--steel-blue); }

/* ---------- TOP 5 ---------- */
.hvac-top5 {
  padding: 96px 0 64px;
}
.hvac-top5 .lede-row {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 64px;
  align-items: end;
  margin-bottom: 56px;
}
.hvac-top5 .lede-row .label {
  font-family: "JetBrains Mono", monospace;
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--copper);
  margin-bottom: 14px;
  display: inline-flex; align-items: center; gap: 10px;
}
.hvac-top5 .lede-row .label::before {
  content: ""; width: 28px; height: 1px; background: var(--copper);
}
.hvac-top5 h2 {
  font-family: "Playfair Display", serif;
  font-weight: 400;
  font-size: clamp(40px, 5vw, 64px);
  margin: 0;
  letter-spacing: -0.015em;
  color: var(--ink);
  line-height: 1.02;
}
.hvac-top5 h2 em { font-style: italic; color: var(--steel-blue); }
.hvac-top5 .lede-row .right p {
  margin: 0;
  font-size: 16px;
  line-height: 1.6;
  color: var(--ink-soft);
  max-width: 50ch;
}

.top5-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr;
  grid-template-rows: auto auto auto;
  gap: 18px;
}
.top5-card {
  position: relative;
  border-radius: 4px;
  overflow: hidden;
  background: var(--cream-paper);
  display: block;
  text-decoration: none;
  color: inherit;
  isolation: isolate;
  cursor: pointer;
}
html[data-theme="dark"] .top5-card { background: rgba(40,36,30,0.7); }
.top5-card .img {
  position: absolute; inset: 0;
  background-size: cover;
  background-position: center;
  transition: transform 0.8s cubic-bezier(.2,.7,.2,1);
}
.top5-card:hover .img { transform: scale(1.05); }
.top5-card::after {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(16,14,11,0.0) 35%, rgba(16,14,11,0.78) 100%);
  z-index: 1;
}
.top5-card .rank {
  position: absolute;
  top: 22px; left: 22px;
  z-index: 3;
  font-family: "Playfair Display", serif;
  font-style: italic;
  font-weight: 400;
  font-size: 64px;
  color: var(--cream);
  line-height: 1;
  text-shadow: 0 2px 20px rgba(0,0,0,0.4);
}
.top5-card .meta {
  position: absolute;
  inset: auto 0 0 0;
  z-index: 2;
  padding: 24px;
  color: white;
}
.top5-card h3 {
  font-family: "Playfair Display", serif;
  font-weight: 400;
  font-size: 24px;
  letter-spacing: -0.01em;
  margin: 0 0 8px;
  line-height: 1.1;
}
.top5-card .why {
  font-family: "Playfair Display", serif;
  font-style: italic;
  font-size: 14px;
  color: rgba(239,229,207,0.92);
  margin: 0 0 14px;
  max-width: 38ch;
}
.top5-card .row {
  display: flex; align-items: center; justify-content: space-between;
  font-family: "JetBrains Mono", monospace;
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: rgba(239,229,207,0.78);
  border-top: 1px solid rgba(239,229,207,0.25);
  padding-top: 10px;
}

/* feature card */
.top5-card.feature { grid-column: 1; grid-row: 1 / span 2; min-height: 540px; }
.top5-card.feature h3 { font-size: 38px; line-height: 1.04; max-width: 14ch; }
.top5-card.feature .why { font-size: 17px; max-width: 42ch; }
.top5-card.feature .rank { font-size: 96px; }

/* small cards */
.top5-card.small { grid-column: 2; min-height: 260px; }
.top5-card.small.s-1 { grid-row: 1; }
.top5-card.small.s-2 { grid-row: 2; }
/* bottom row */
.top5-card.wide { grid-column: 1; grid-row: 3; min-height: 240px; }
.top5-card.wide h3 { font-size: 26px; }
.top5-card.right2 { grid-column: 2; grid-row: 3; min-height: 240px; }

/* ---------- CONTRIBUTORS ---------- */
.hvac-contributors {
  padding: 80px 0 64px;
  position: relative;
}
.hvac-contributors .contrib-head {
  margin-bottom: 48px;
}
.hvac-contributors .contrib-head .label {
  font-family: "JetBrains Mono", monospace;
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--copper);
  margin-bottom: 14px;
  display: inline-flex; align-items: center; gap: 10px;
}
.hvac-contributors .contrib-head .label::before {
  content: ""; width: 28px; height: 1px; background: var(--copper);
}
.hvac-contributors h2 {
  font-family: "Playfair Display", serif;
  font-weight: 400;
  font-size: clamp(40px, 5vw, 56px);
  margin: 0 0 16px;
  letter-spacing: -0.015em;
  color: var(--ink);
}
.hvac-contributors h2 em { font-style: italic; color: var(--steel-blue); }
.hvac-contributors .contrib-head p {
  font-size: 16px;
  line-height: 1.6;
  color: var(--ink-soft);
  max-width: 50ch;
  margin: 0;
}

.contrib-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}
.contributor-card {
  display: flex;
  flex-direction: column;
  background: var(--cream-paper);
  border-radius: 4px;
  padding: 24px;
  text-decoration: none;
  color: inherit;
  border: 1px solid var(--rule);
  transition: all 0.3s ease;
}
html[data-theme="dark"] .contributor-card {
  background: rgba(40,36,30,0.5);
  border-color: rgba(239,229,207,0.15);
}
.contributor-card:hover {
  border-color: var(--copper);
  background: var(--cream-paper);
}
html[data-theme="dark"] .contributor-card:hover {
  background: rgba(40,36,30,0.75);
}

.contributor-card .header {
  margin-bottom: 20px;
  border-bottom: 1px solid var(--rule);
  padding-bottom: 16px;
}
.contributor-card .meta h4 {
  font-family: "Playfair Display", serif;
  font-size: 18px;
  font-weight: 400;
  margin: 0 0 6px;
  color: var(--ink);
}
.contributor-card .role {
  font-family: "JetBrains Mono", monospace;
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--copper);
  margin: 0 0 4px;
  font-weight: 500;
}
.contributor-card .location {
  font-size: 13px;
  color: var(--ink-mute);
  margin: 0;
}

.contributor-card .content {
  flex-grow: 1;
  margin-bottom: 16px;
}
.contributor-card h5 {
  font-family: "Playfair Display", serif;
  font-size: 17px;
  font-weight: 400;
  margin: 0 0 8px;
  color: var(--ink);
  line-height: 1.2;
}
.contributor-card p {
  font-size: 14px;
  line-height: 1.5;
  color: var(--ink-soft);
  margin: 0;
}

.contributor-card .footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 12px;
  border-top: 1px solid var(--rule);
  font-size: 12px;
  color: var(--ink-mute);
}
.contributor-card .time {
  font-family: "JetBrains Mono", monospace;
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.contributor-card .link-arrow {
  font-size: 16px;
  color: var(--copper);
  text-decoration: none;
  transition: color 0.18s;
}
.contributor-card:hover .link-arrow {
  color: var(--copper-deep);
}

/* Iris Editor's Pick highlight */
.contributor-card.iris-pick {
  border-color: var(--copper);
  background: rgba(212,132,92,0.08);
}
html[data-theme="dark"] .contributor-card.iris-pick {
  background: rgba(212,132,92,0.12);
}

/* ---------- ALL HOW-TOS (the menu) ---------- */
.hvac-menu {
  padding: 80px 0 48px;
  position: relative;
}
.hvac-menu .menu-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-bottom: 36px;
  gap: 32px;
}
.hvac-menu h2 {
  font-family: "Playfair Display", serif;
  font-weight: 400;
  font-size: clamp(40px, 5vw, 56px);
  margin: 0;
  letter-spacing: -0.015em;
  color: var(--ink);
}
.hvac-menu h2 em { font-style: italic; color: var(--steel-blue); }
.hvac-menu .menu-head .count {
  font-family: "JetBrains Mono", monospace;
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-mute);
}

.menu-tabs {
  display: flex;
  align-items: center;
  gap: 4px;
  border-bottom: 1px solid var(--rule);
  margin-bottom: 0;
  overflow-x: auto;
  scrollbar-width: none;
}
.menu-tabs::-webkit-scrollbar { display: none; }
.menu-tab {
  font-family: "DM Sans", sans-serif;
  font-size: 14px;
  background: none;
  border: none;
  padding: 14px 18px;
  color: var(--ink-mute);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  white-space: nowrap;
  transition: color 0.18s, border-color 0.18s;
}
.menu-tab:hover { color: var(--ink); }
.menu-tab.on {
  color: var(--ink);
  border-bottom-color: var(--steel-blue);
}
.menu-tab .num {
  font-family: "JetBrains Mono", monospace;
  font-size: 10px;
  letter-spacing: 0.16em;
  color: var(--ink-mute);
  margin-left: 8px;
}

.menu-list {
  border-top: 1px solid var(--rule);
  margin-top: 24px;
}

.menu-row {
  display: grid;
  grid-template-columns: 40px 1fr 1fr 140px 100px 28px;
  gap: 24px;
  align-items: center;
  padding: 20px 0;
  border-bottom: 1px solid var(--rule);
  text-decoration: none;
  color: inherit;
  transition: background 0.18s;
}
.menu-row:hover { background: rgba(0,0,0,0.02); }
html[data-theme="dark"] .menu-row:hover { background: rgba(255,255,255,0.03); }

.menu-row .num {
  font-family: "JetBrains Mono", monospace;
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-mute);
}
.menu-row .title h4 {
  font-family: "Playfair Display", serif;
  font-size: 16px;
  font-weight: 400;
  margin: 0 0 6px;
  color: var(--ink);
}
.menu-row .title .desc {
  font-size: 13px;
  color: var(--ink-soft);
  margin: 0;
  line-height: 1.4;
}
.menu-row .tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.menu-row .tag {
  display: inline-block;
  font-size: 11px;
  padding: 4px 8px;
  background: var(--cream-paper);
  border-radius: 2px;
  color: var(--ink-mute);
  font-family: "JetBrains Mono", monospace;
  letter-spacing: 0.08em;
}
html[data-theme="dark"] .menu-row .tag {
  background: rgba(239,229,207,0.08);
}

.menu-row .duration {
  text-align: right;
  font-size: 14px;
  color: var(--ink);
  font-weight: 500;
}
.menu-row .duration .l {
  display: block;
  font-size: 11px;
  color: var(--ink-mute);
  margin-top: 4px;
  font-family: "JetBrains Mono", monospace;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-weight: 400;
}

.menu-row .level {
  display: flex;
  gap: 3px;
  align-items: center;
}
.menu-row .pip {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--rule);
  transition: background 0.18s;
}
.menu-row .pip.on {
  background: var(--steel-blue);
}
.menu-row .level[data-level="hard"] .pip.on {
  background: var(--copper);
}

.menu-row .arrow {
  text-align: right;
  font-size: 16px;
  color: var(--ink-mute);
  opacity: 0;
  transition: opacity 0.18s, color 0.18s;
}
.menu-row:hover .arrow {
  opacity: 1;
  color: var(--copper);
}

/* ---------- ASK IRIS ---------- */
.ask-iris {
  padding: 64px 0;
  background: linear-gradient(135deg, rgba(46,90,122,0.06) 0%, rgba(212,132,92,0.04) 100%);
}
html[data-theme="dark"] .ask-iris {
  background: linear-gradient(135deg, rgba(46,90,122,0.08) 0%, rgba(212,132,92,0.06) 100%);
}

.iris-prompt {
  text-align: center;
  max-width: 60ch;
  margin: 0 auto;
}
.iris-prompt h2 {
  font-family: "Playfair Display", serif;
  font-size: clamp(32px, 4vw, 48px);
  margin: 0 0 20px;
  color: var(--ink);
  line-height: 1.1;
}
.iris-prompt > p {
  font-size: 16px;
  color: var(--ink-soft);
  margin: 0 0 24px;
  line-height: 1.6;
}

.iris-input {
  width: 100%;
  padding: 16px 20px;
  font-size: 15px;
  border: 1px solid var(--rule);
  border-radius: 4px;
  background: var(--cream-paper);
  color: var(--ink);
  font-family: "DM Sans", sans-serif;
  outline: none;
  transition: border-color 0.18s;
}
html[data-theme="dark"] .iris-input {
  background: rgba(40,36,30,0.4);
  border-color: rgba(239,229,207,0.2);
}
.iris-input:focus {
  border-color: var(--steel-blue);
}
.iris-input::placeholder {
  color: var(--ink-mute);
}

/* ---------- MISTAKES ---------- */
.hvac-mistakes {
  padding: 80px 0 48px;
}
.hvac-mistakes .mistakes-head {
  margin-bottom: 48px;
}
.hvac-mistakes .mistakes-head .label {
  font-family: "JetBrains Mono", monospace;
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--copper);
  margin-bottom: 14px;
  display: inline-flex; align-items: center; gap: 10px;
}
.hvac-mistakes .mistakes-head .label::before {
  content: ""; width: 28px; height: 1px; background: var(--copper);
}
.hvac-mistakes h2 {
  font-family: "Playfair Display", serif;
  font-weight: 400;
  font-size: clamp(40px, 5vw, 56px);
  margin: 0 0 16px;
  letter-spacing: -0.015em;
  color: var(--ink);
}
.hvac-mistakes h2 em { font-style: italic; color: var(--steel-blue); }
.hvac-mistakes .mistakes-head p {
  font-size: 16px;
  line-height: 1.6;
  color: var(--ink-soft);
  max-width: 50ch;
  margin: 0;
}

.mistakes-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 28px;
}
.mistake {
  position: relative;
  padding: 24px;
  border: 1px solid var(--rule);
  border-radius: 4px;
  background: var(--cream-paper);
}
html[data-theme="dark"] .mistake {
  background: rgba(40,36,30,0.5);
  border-color: rgba(239,229,207,0.15);
}

.mistake .stamp {
  position: absolute;
  top: -12px;
  left: 24px;
  display: flex;
  align-items: center;
  gap: 6px;
  font-family: "Playfair Display", serif;
  font-size: 28px;
  color: var(--copper);
  line-height: 1;
}
.mistake .stamp .x { font-size: 32px; }
.mistake .stamp .n {
  font-family: "JetBrains Mono", monospace;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--copper);
  font-weight: 500;
}

.mistake h4 {
  font-family: "Playfair Display", serif;
  font-size: 16px;
  font-weight: 400;
  margin: 16px 0 10px;
  color: var(--ink);
}
.mistake p {
  font-size: 14px;
  color: var(--ink-soft);
  margin: 0 0 12px;
  line-height: 1.5;
}
.mistake .fix {
  font-size: 13px;
  color: var(--steel-blue);
  padding: 12px;
  background: rgba(46,90,122,0.08);
  border-radius: 2px;
  font-weight: 500;
  line-height: 1.5;
}
html[data-theme="dark"] .mistake .fix {
  background: rgba(46,90,122,0.12);
}

/* ---------- TOOLS ---------- */
.hvac-tools {
  padding: 80px 0 48px;
}
.tools-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 64px;
}

.hvac-tools .left {
  display: flex;
  flex-direction: column;
}
.hvac-tools .label {
  font-family: "JetBrains Mono", monospace;
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--copper);
  margin-bottom: 14px;
  display: inline-flex; align-items: center; gap: 10px;
  width: fit-content;
}
.hvac-tools .label::before {
  content: ""; width: 28px; height: 1px; background: var(--copper);
}
.hvac-tools h2 {
  font-family: "Playfair Display", serif;
  font-weight: 400;
  font-size: clamp(40px, 5vw, 56px);
  margin: 0 0 16px;
  letter-spacing: -0.015em;
  color: var(--ink);
}
.hvac-tools h2 em { font-style: italic; color: var(--steel-blue); }
.hvac-tools .left > p {
  font-size: 16px;
  line-height: 1.6;
  color: var(--ink-soft);
  max-width: 50ch;
  margin: 0 0 24px;
}

.hvac-tools .pull {
  font-family: "Playfair Display", serif;
  font-style: italic;
  font-size: 16px;
  line-height: 1.6;
  color: var(--ink);
  margin-top: auto;
  padding: 20px;
  border-left: 2px solid var(--copper);
  background: var(--cream-paper);
  border-radius: 2px;
}
html[data-theme="dark"] .hvac-tools .pull {
  background: rgba(40,36,30,0.4);
}

.hvac-tools .pull .src {
  display: block;
  font-style: normal;
  font-size: 13px;
  color: var(--ink-soft);
  margin-top: 8px;
  font-family: "JetBrains Mono", monospace;
  font-weight: 500;
}

.tool-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.tool {
  display: grid;
  grid-template-columns: 36px 1fr auto;
  gap: 20px;
  align-items: flex-start;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--rule);
}
.tool:last-child {
  padding-bottom: 0;
  border-bottom: none;
}

.tool .n {
  font-family: "JetBrains Mono", monospace;
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-mute);
  margin-top: 2px;
}

.tool h5 {
  font-family: "Playfair Display", serif;
  font-size: 15px;
  font-weight: 400;
  margin: 0 0 6px;
  color: var(--ink);
}
.tool .desc {
  font-size: 13px;
  color: var(--ink-soft);
  margin: 0;
  line-height: 1.5;
}

.tool .price {
  font-family: "JetBrains Mono", monospace;
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--copper);
  font-weight: 500;
  text-align: right;
}

/* ---------- RESPONSIVE ---------- */
@media (max-width: 768px) {
  .hvac-hero-grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }

  .hvac-stats {
    grid-template-columns: repeat(2, 1fr);
  }

  .top5-grid {
    grid-template-columns: 1fr;
  }
  .top5-card.feature,
  .top5-card.small,
  .top5-card.wide,
  .top5-card.right2 {
    grid-column: auto;
    min-height: 280px;
  }

  .contrib-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .menu-row {
    grid-template-columns: 1fr;
    gap: 12px;
  }
  .menu-row .num,
  .menu-row .duration,
  .menu-row .level,
  .menu-row .arrow {
    display: none;
  }

  .tools-grid {
    grid-template-columns: 1fr;
    gap: 48px;
  }

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

@media (max-width: 480px) {
  .hvac-stats {
    grid-template-columns: 1fr;
  }

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

  .hvac-top5 .lede-row {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .hvac-contributors .contrib-head,
  .hvac-mistakes .mistakes-head {
    text-align: center;
  }

  .menu-tabs {
    border-bottom: 1px solid var(--rule);
  }
}