/* 00  Core — resets and behaviour hooks only. Every visual decision for this
       site lives in the sections below, starting with the design tokens.    */

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; }
img, svg, iframe, video { display: block; max-width: 100%; }
img { height: auto; }
iframe { border: 0; }
figure { margin: 0; }
[hidden] { display: none !important; }
:where(a, button, input, select, textarea, summary, [tabindex]):focus-visible { outline: 3px solid var(--focus); outline-offset: 3px; }
.skip-link { position: absolute; left: 0.5rem; top: 0.5rem; z-index: 999; transform: translateY(-160%); padding: 0.8rem 1.2rem; background: #000; color: #fff; font-weight: 700; text-decoration: none; }
.skip-link:focus { transform: none; }
.visually-hidden { position: absolute !important; width: 1px; height: 1px; margin: -1px; padding: 0; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }
.nav-toggle .icon-close, .nav-toggle[aria-expanded="true"] .icon-open { display: none; }
.nav-toggle[aria-expanded="true"] .icon-close { display: block; }
summary { cursor: pointer; }
summary::-webkit-details-marker { display: none; }
.hp-field { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.field { display: flex; flex-direction: column; gap: 0.3rem; min-width: 0; }
.field__error { margin: 0; min-height: 1rem; font-size: 0.82rem; font-weight: 700; color: var(--err); }
.field.is-invalid :where(input, select, textarea) { border-color: var(--err); }
.form-status { min-height: 1.2rem; font-weight: 700; }
.form-status.is-error { color: var(--err); }
.form-status.is-ok { color: var(--ok); }
.img-placeholder { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 0.25rem; width: 100%; padding: 1rem; text-align: center; font-size: 0.72rem; letter-spacing: 0.08em; text-transform: uppercase; line-height: 1.5; }
.img-placeholder b { display: block; font-size: 0.92rem; letter-spacing: 0; text-transform: none; word-break: break-all; }
:target { scroll-margin-top: 120px; }
@media (prefers-reduced-motion: no-preference) { html { scroll-behavior: smooth; } }
@media (prefers-reduced-motion: reduce) { *, *::before, *::after { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; scroll-behavior: auto !important; } }

/* ==========================================================================
   Oakcrest HVAC & Surface Partners — oakcresthvac.xyz
   THE DEVICE: numbered callout pins. Every photograph carries numbered pins
   sitting on the equipment, and a numbered list beside it says what each one
   is. The site teaches you to look at your own system.
   01 Tokens · 02 Base · 03 Header (centred masthead) · 04 Buttons
   05 Hero · 06 Page heads · 07 Pinned figures · 08 Sections
   09 Smells (signature) · 10 FAQ · 11 Form & contact · 12 Footer · 13 Images
   ========================================================================== */

/* 01 Tokens */
:root {
  --paper: #f2f0ee; --paper-2: #e6e2df; --white: #ffffff;
  --plum: #3d2839; --plum-2: #54374f; --plum-soft: #ddd2da;
  --gold: #c99a2e; --gold-dark: #7d5c0d; --gold-soft: #f6ecd4;
  --ink: #1f1520; --text: #514653; --muted: #756a77; --line: #d6cfd4;
  --focus: #7d5c0d; --err: #a02820; --stop: #a02820;
  --disp: "Sora", "Segoe UI", system-ui, sans-serif;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --f-sm: 0.91rem; --f-xs: 0.77rem; --f0: clamp(1rem, 0.97rem + 0.16vw, 1.06rem);
  --f1: clamp(1.14rem, 1.03rem + 0.5vw, 1.36rem);
  --f2: clamp(1.6rem, 1.3rem + 1.5vw, 2.35rem); --f3: clamp(1.95rem, 1.48rem + 2.4vw, 3.15rem);
  --r: 4px; --wrap: 1140px; --pad-y: clamp(2.9rem, 2.2rem + 3.3vw, 4.9rem);
}

/* 02 Base */
body { background: var(--paper); color: var(--text); font-family: var(--sans); font-size: var(--f0); line-height: 1.68; }
h1, h2, h3 { margin: 0 0 0.46em; font-family: var(--disp); color: var(--ink); font-weight: 700; line-height: 1.17; letter-spacing: -0.03em; text-wrap: balance; }
h1 { font-size: var(--f3); }
h2 { font-size: var(--f2); }
h3 { font-size: var(--f1); }
p { margin: 0 0 1em; max-width: 64ch; }
p:last-child { margin-bottom: 0; }
a { color: var(--gold-dark); text-underline-offset: 3px; }
a:hover { color: var(--ink); }
strong, b { color: var(--ink); font-weight: 700; }
ul, ol { margin: 0 0 1em; padding-left: 1.2em; }
.wrap { width: min(100% - 2rem, var(--wrap)); margin-inline: auto; }
.eyebrow { display: block; margin-bottom: 0.55rem; font-family: var(--disp); font-size: 0.71rem; font-weight: 700; letter-spacing: 0.21em; text-transform: uppercase; color: var(--gold-dark); }
.sec--plum .eyebrow, .phead .eyebrow, .hero .eyebrow { color: #e5c274; }
.mt { margin-top: 2rem; }

/* 03 Header — centred masthead, nav on its own row beneath */
.hd { position: sticky; top: 0; z-index: 30; background: var(--paper); border-bottom: 1px solid var(--line); }
.hd__top { display: grid; grid-template-columns: 40px 1fr 40px; align-items: center; gap: 0.5rem; min-height: 56px; }
.oc-logo { display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem; grid-column: 2; color: var(--ink); text-decoration: none; }
.oc-logo svg { width: 27px; height: 27px; flex: none; }
.oc-logo b { display: block; font-family: var(--disp); font-size: 1.1rem; font-weight: 700; letter-spacing: -0.035em; color: var(--ink); line-height: 1.15; }
.oc-logo small { display: block; font-size: 0.53rem; font-weight: 700; letter-spacing: 0.17em; text-transform: uppercase; color: var(--gold-dark); }
.nav-toggle { display: inline-flex; align-items: center; justify-content: center; grid-column: 1; width: 40px; height: 38px; padding: 0; border: 1px solid var(--line); border-radius: var(--r); background: var(--white); color: var(--ink); cursor: pointer; }
.nav-toggle svg { width: 18px; height: 18px; }
.hd__call { display: inline-flex; align-items: center; justify-content: center; grid-column: 3; width: 40px; height: 38px; border: 1px solid var(--plum); border-radius: var(--r); background: var(--plum); color: #fff; text-decoration: none; }
.hd__call svg { width: 17px; height: 17px; }
.hd__call span { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.hd__row2 { padding-bottom: 0.7rem; }
.hd__row2 .btn { display: flex; width: 100%; }
.ocnav { display: none; }
@media (max-width: 939px) {
  .ocnav { position: absolute; top: 100%; left: 0; right: 0; flex-direction: column; padding: 0.3rem 1rem 1.2rem; background: var(--paper); border-bottom: 1px solid var(--line); }
  .ocnav.is-open { display: flex; }
  .ocnav a { padding: 0.85rem 0.2rem; border-bottom: 1px solid var(--line); color: var(--ink); font-family: var(--disp); font-size: 1.06rem; font-weight: 700; text-decoration: none; }
  .ocnav a[aria-current="page"] { color: var(--gold-dark); }
}
@media (min-width: 940px) {
  .hd__top { grid-template-columns: 1fr auto 1fr; min-height: 74px; padding-top: 0.4rem; }
  .nav-toggle { display: none; }
  .hd__call { grid-column: 1; justify-self: start; width: auto; height: auto; padding: 0.35rem 0.1rem; border: 0; background: transparent; color: var(--ink); font-family: var(--disp); font-weight: 700; gap: 0.4rem; }
  .hd__call svg { color: var(--gold-dark); }
  .hd__call span { position: static; width: auto; height: auto; clip: auto; }
  .hd__call:hover { color: var(--gold-dark); }
  .hd__row2 { display: flex; justify-content: center; padding-bottom: 0.2rem; }
  .hd__row2 .btn { display: none; }
  .ocnav { display: flex; gap: 1.6rem; }
  .ocnav a { padding: 0.45rem 0 0.7rem; color: var(--text); font-weight: 600; text-decoration: none; border-bottom: 3px solid transparent; white-space: nowrap; }
  .ocnav a:hover { color: var(--ink); }
  .ocnav a[aria-current="page"] { color: var(--ink); border-bottom-color: var(--gold); }
}
.hd__cta { display: none; }
@media (min-width: 940px) { .hd__cta { display: inline-flex; grid-column: 3; justify-self: end; } }

/* 04 Buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem; padding: 0.7rem 1.35rem; border: 0; border-radius: var(--r); background: var(--plum); color: #fff; font-family: var(--disp); font-size: 0.97rem; font-weight: 700; line-height: 1.3; text-decoration: none; white-space: nowrap; cursor: pointer; transition: background-color 0.18s, color 0.18s; }
.btn:hover { background: var(--ink); color: #fff; }
.btn svg { width: 1.05em; height: 1.05em; flex: none; }
.btn--gold { background: var(--gold); color: #33270a; }
.btn--gold:hover { background: #e5c274; color: #33270a; }
.btn--line { background: transparent; color: var(--plum); box-shadow: inset 0 0 0 2px var(--plum); }
.btn--line:hover { background: var(--plum); color: #fff; }
.btn--paper, .phead a.btn--paper, .sec--plum a.btn--paper, .hero a.btn--paper, .sm__out a.btn--paper { background: var(--paper); color: var(--ink); }
.btn--paper:hover, .phead a.btn--paper:hover, .sec--plum a.btn--paper:hover, .hero a.btn--paper:hover, .sm__out a.btn--paper:hover { background: #fff; color: var(--ink); }
@media (max-width: 460px) { .btn { white-space: normal; text-align: center; } }
.btns { display: flex; flex-wrap: wrap; gap: 0.6rem; margin-top: 1.4rem; }

/* 05 Hero */
.hero { padding-block: clamp(2.6rem, 2rem + 3vw, 4.4rem); background: var(--plum); color: #c3b2c0; }
.hero h1 { color: #fff; max-width: 17ch; }
.hero p.lede { font-size: var(--f1); line-height: 1.52; color: #e4dae1; max-width: 50ch; }
.hero :focus-visible { outline-color: #e5c274; }

/* 06 Page heads */
.phead { padding-block: clamp(2.1rem, 1.7rem + 2.4vw, 3.4rem); background: var(--plum); color: #c3b2c0; }
.phead h1 { color: #fff; max-width: 20ch; }
.phead p { font-size: 1.04rem; max-width: 58ch; }
.phead a:not(.btn) { color: #fff; }
.phead :focus-visible { outline-color: #e5c274; }
.crumbs { display: flex; flex-wrap: wrap; gap: 0.45rem; margin: 0 0 0.9rem; padding: 0; list-style: none; font-size: 0.83rem; }
.crumbs li + li::before { content: "\2022"; margin-right: 0.45rem; color: #e5c274; }

/* 07 Pinned figures — the device */
.pinned { position: relative; margin: 0; border-radius: var(--r); overflow: hidden; }
.pinned img, .pinned .img-placeholder { display: block; width: 100%; aspect-ratio: 4 / 3; object-fit: cover; }
.pin { position: absolute; display: flex; align-items: center; justify-content: center; width: 30px; height: 30px; margin: -15px 0 0 -15px; border: 2px solid #fff; border-radius: 50%; background: var(--gold); color: #33270a; font-family: var(--disp); font-size: 0.85rem; font-weight: 700; box-shadow: 0 2px 8px rgba(31,21,32,0.45); }
.pinfig { display: grid; gap: 1.6rem; }
@media (min-width: 900px) { .pinfig { grid-template-columns: 1.05fr 0.95fr; gap: 2.8rem; align-items: center; } .pinfig--flip > :first-child { order: 2; } }
.pinfig > * { min-width: 0; }
.pinlist { margin: 1rem 0 0; padding: 0; list-style: none; counter-reset: k; }
.pinlist li { position: relative; padding: 0.75rem 0 0.75rem 2.5rem; border-bottom: 1px solid var(--line); }
.sec--plum .pinlist li { border-bottom-color: rgba(255,255,255,0.22); }
.pinlist li::before { counter-increment: k; content: counter(k); position: absolute; left: 0; top: 0.85rem; display: flex; align-items: center; justify-content: center; width: 26px; height: 26px; border-radius: 50%; background: var(--gold); color: #33270a; font-family: var(--disp); font-size: 0.79rem; font-weight: 700; }
.pinlist b { display: block; font-family: var(--disp); font-size: 1.04rem; }
.pinlist span { font-size: var(--f-sm); }
.pincap { margin: 0.6rem 0 0; font-size: var(--f-xs); color: var(--muted); }

/* 08 Sections */
.sec { padding-block: var(--pad-y); }
.sec--paper { background: var(--paper); }
.sec--white { background: var(--white); }
.sec--tint { background: var(--paper-2); }
.sec--plum { background: var(--plum); color: #c3b2c0; }
.sec--plum h2, .sec--plum h3, .sec--plum b { color: #fff; }
.sec--plum a:not(.btn) { color: #fff; }
.sec--plum :focus-visible { outline-color: #e5c274; }
.head { max-width: 640px; margin-bottom: 0.4rem; }
.duo { display: grid; gap: 1.4rem; margin-top: 1.9rem; }
@media (min-width: 840px) { .duo { grid-template-columns: repeat(2, 1fr); gap: 2rem; } }
.duo article { padding: 1.35rem 1.45rem; background: var(--white); border-radius: var(--r); border-bottom: 4px solid var(--gold); }
.sec--white .duo article { background: var(--paper); }
.duo h3 { font-size: 1.18rem; }
.duo ul { margin: 0.75rem 0 0; padding-left: 1.05em; font-size: var(--f-sm); }
.duo li { margin-bottom: 0.3rem; }
.plain { margin: 1.4rem 0 0; padding: 0; list-style: none; }
.plain li { padding: 0.85rem 0; border-bottom: 1px solid var(--line); }
.sec--plum .plain li { border-bottom-color: rgba(255,255,255,0.22); }
.plain b { display: block; font-family: var(--disp); font-size: 1.04rem; }
.plain span { font-size: var(--f-sm); }
.map { display: block; width: 100%; height: clamp(300px, 34vw, 380px); background: var(--paper-2); border-radius: var(--r); }
.where { display: grid; gap: 2rem; align-items: center; }
@media (min-width: 880px) { .where { grid-template-columns: 1fr 1fr; gap: 3rem; } }

/* 09 Smells (signature) */
.sm { display: grid; gap: 1.8rem; }
@media (min-width: 980px) { .sm { grid-template-columns: 0.9fr 1.1fr; gap: 2.8rem; align-items: start; } .sm__set { position: sticky; top: 9.5rem; } }
.sm__set { padding: clamp(1.3rem, 1.1rem + 1.4vw, 1.9rem); background: var(--white); border-radius: var(--r); border-top: 4px solid var(--gold); }
.sm__set h2 { font-size: 1.24rem; }
.sm__set label.lead { display: block; margin: 1.1rem 0 0.4rem; font-weight: 700; color: var(--ink); }
.sm__set fieldset { margin: 1.4rem 0 0; padding: 0; border: 0; }
.sm__set legend { padding: 0; font-weight: 700; color: var(--ink); }
.whenopts { display: grid; gap: 0.4rem; margin-top: 0.6rem; }
.whenopts label { position: relative; }
.whenopts input { position: absolute; opacity: 0; }
.whenopts span { display: block; padding: 0.6rem 0.8rem; border: 1px solid var(--line); border-radius: var(--r); background: var(--paper); font-size: var(--f-sm); font-weight: 600; cursor: pointer; }
.whenopts input:checked + span { background: var(--plum); border-color: var(--plum); color: #fff; }
.whenopts input:focus-visible + span { outline: 3px solid var(--focus); outline-offset: 2px; }
.sm__out { padding: clamp(1.3rem, 1.1rem + 1.4vw, 1.9rem); background: var(--plum); color: #c3b2c0; border-radius: var(--r); }
.sm__out h2 { color: #fff; font-size: 1.1rem; }
.sm__out b { color: #fff; }
.sm__out ul { margin: 0.9rem 0 0; padding-left: 1.15em; font-size: var(--f-sm); }
.sm__out li { margin-bottom: 0.42rem; }
.urg { display: block; margin: 0.5rem 0 1rem; padding: 0.85rem 1rem; border-radius: var(--r); font-family: var(--disp); font-weight: 700; line-height: 1.35; }
.urg--emergency { background: var(--stop); color: #fff; }
.urg--stop { background: #e5c274; color: #33270a; }
.urg--book { background: rgba(255,255,255,0.14); color: #fff; }
.urg--normal { background: rgba(255,255,255,0.14); color: #fff; }
.sm__out .title { display: block; margin-bottom: 0.6rem; font-family: var(--disp); font-size: clamp(1.3rem, 1.1rem + 1.1vw, 1.8rem); font-weight: 700; color: #fff; line-height: 1.22; }
.sm__out .when { margin-top: 1.1rem; padding-top: 0.9rem; border-top: 1px solid rgba(255,255,255,0.22); font-size: var(--f-sm); }
.sm__out .caveat { margin-top: 1.2rem; padding-top: 0.9rem; border-top: 1px solid rgba(255,255,255,0.22); font-size: 0.85rem; color: #a292a0; }
.sm__out :focus-visible { outline-color: #e5c274; }

/* 10 FAQ */
.faq { display: grid; gap: 0; max-width: 870px; margin-top: 1.5rem; border-top: 2px solid var(--plum); }
.ocq { border-bottom: 1px solid var(--line); }
.ocq summary { display: flex; justify-content: space-between; gap: 1rem; padding: 1rem 0; font-family: var(--disp); font-weight: 700; font-size: 1.03rem; color: var(--ink); list-style: none; cursor: pointer; }
.ocq summary::after { content: "+"; flex: none; color: var(--gold-dark); }
.ocq[open] summary::after { content: "\2013"; }
.ocq > div { padding: 0 0 1.1rem; }

/* 11 Form & contact */
.form { display: grid; gap: 1rem 1.3rem; margin-top: 1.2rem; }
@media (min-width: 640px) { .form--2col { grid-template-columns: 1fr 1fr; } }
.field--full, .form__end { grid-column: 1 / -1; }
.field label, .picks legend { font-weight: 700; color: var(--ink); font-size: 0.94rem; }
.req { color: var(--err); }
.opt { font-weight: 400; color: var(--muted); }
input[type="text"], input[type="tel"], input[type="email"], input[type="number"], select, textarea { width: 100%; padding: 0.72rem 0.9rem; font: inherit; color: var(--ink); background: var(--white); border: 1px solid #bdb2bb; border-radius: var(--r); }
select { appearance: none; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%233d2839' stroke-width='2.6'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 0.85rem center; background-size: 15px; padding-right: 2.3rem; }
textarea { min-height: 140px; resize: vertical; }
input:focus, select:focus, textarea:focus { border-color: var(--plum); }
.picks { margin: 0; padding: 0; border: 0; display: flex; flex-direction: row; flex-wrap: wrap; gap: 0.4rem; }
.picks legend { margin-bottom: 0.45rem; padding: 0; }
.pick { position: relative; }
.pick input { position: absolute; opacity: 0; }
.pick span { display: inline-block; padding: 0.44rem 0.9rem; border: 1px solid #bdb2bb; border-radius: 999px; background: var(--white); font-size: var(--f-sm); cursor: pointer; }
.pick input:checked + span { background: var(--plum); border-color: var(--plum); color: #fff; }
.pick input:focus-visible + span { outline: 3px solid var(--focus); outline-offset: 2px; }
.form-note { margin: 0.5rem 0 0; font-size: 0.84rem; color: var(--muted); }
.contact { display: grid; gap: 2.2rem; align-items: start; }
@media (min-width: 920px) { .contact { grid-template-columns: 1.1fr 0.9fr; gap: 3rem; } }
.contact > * { min-width: 0; }
.side { display: grid; gap: 1rem; }
.side__card { padding: 1.25rem 1.4rem; background: var(--white); border-radius: var(--r); border-bottom: 4px solid var(--gold); }
.side__card h2 { font-size: 1.04rem; }
.side__card .big { display: block; margin: 0.15rem 0 0.3rem; font-family: var(--disp); font-size: 1.45rem; font-weight: 700; color: var(--ink); text-decoration: none; }

/* 12 Footer */
.ft { background: var(--ink); color: #9a8d9b; font-size: var(--f-sm); }
.ft a { color: #fff; }
.ft :focus-visible { outline-color: #e5c274; }
.ft__row { display: grid; gap: 1.5rem; padding-block: 2.8rem 1.6rem; }
@media (min-width: 820px) { .ft__row { grid-template-columns: 1.5fr 1fr 1fr; } }
.ft__name { margin: 0 0 0.45rem; font-family: var(--disp); font-size: 1.14rem; font-weight: 700; color: #fff; }
.ft h2 { margin: 0 0 0.55rem; font-family: var(--sans); font-size: 0.72rem; letter-spacing: 0.16em; text-transform: uppercase; color: #e5c274; }
.ft ul { margin: 0; padding: 0; list-style: none; display: grid; gap: 0.32rem; }
.ft__base { padding-block: 0.9rem; border-top: 1px solid rgba(255,255,255,0.15); font-size: 0.8rem; }

/* 13 Images */
.img-placeholder { background: var(--paper-2); border: 1px dashed #b5abb3; color: var(--muted); }
.img-placeholder b { color: var(--ink); overflow-wrap: anywhere; }