/* 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; } }

/* ==========================================================================
   Ashton HVAC Solutions — ashtonhvac.xyz
   Paper white, deep violet and brass. A quiet editorial layout.
   01 Tokens · 02 Base · 03 Header · 04 Call strip (mobile) · 05 Buttons
   06 Hero · 07 Page heads · 08 Sections · 09 Noise guide (signature)
   10 FAQ · 11 Form & contact · 12 Footer · 13 Images
   ========================================================================== */

/* 01 Tokens */
:root {
  --violet: #3b2a63; --violet-2: #4c3780; --violet-soft: #ece7f6; --paper: #fbfaf7; --paper-2: #f2eee7; --white: #ffffff;
  --brass: #a8802f; --brass-dark: #8a6720; --brass-soft: #f6eeda;
  --ink: #1f1b2b; --text: #4a4557; --muted: #6b6578; --line: #e2dcd2;
  --focus: #4c3780; --err: #a32424; --ok: #2f6b4a;
  --serif: "Piazzolla", "Iowan Old Style", Georgia, serif;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --f-sm: 0.92rem; --f0: clamp(1rem, 0.97rem + 0.16vw, 1.08rem); --f1: clamp(1.15rem, 1.03rem + 0.5vw, 1.4rem);
  --f2: clamp(1.75rem, 1.35rem + 1.7vw, 2.5rem); --f3: clamp(2.1rem, 1.5rem + 2.8vw, 3.5rem);
  --r: 10px; --wrap: 1120px; --pad-y: clamp(3.2rem, 2.4rem + 4vw, 5.6rem);
}

/* 02 Base */
body { background: var(--paper); color: var(--text); font-family: var(--sans); font-size: var(--f0); line-height: 1.72; }
h1, h2, h3 { margin: 0 0 0.5em; font-family: var(--serif); color: var(--ink); font-weight: 600; line-height: 1.2; text-wrap: balance; }
h1 { font-size: var(--f3); letter-spacing: -0.01em; }
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(--violet-2); text-underline-offset: 3px; }
a:hover { color: var(--brass-dark); }
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; }
.over { display: block; margin-bottom: 0.7rem; font-size: 0.76rem; font-weight: 700; letter-spacing: 0.18em; text-transform: uppercase; color: var(--brass-dark); }
.mt { margin-top: 2rem; }

/* 03 Header */
.hd { position: sticky; top: 0; z-index: 30; background: rgba(251,250,247,0.94); backdrop-filter: blur(8px); border-bottom: 1px solid var(--line); }
.hd .wrap { display: flex; align-items: center; justify-content: space-between; gap: 0.7rem; min-height: 66px; }
.ah-logo { display: inline-flex; align-items: baseline; gap: 0.45rem; color: var(--ink); text-decoration: none; font-family: var(--serif); }
.ah-logo b { font-size: 1.35rem; font-weight: 600; letter-spacing: -0.01em; }
.ah-logo i { font-style: normal; font-family: var(--sans); font-size: 0.7rem; font-weight: 700; letter-spacing: 0.15em; text-transform: uppercase; color: var(--brass-dark); }
.nav-toggle { display: inline-flex; align-items: center; justify-content: center; flex: none; width: 44px; height: 42px; padding: 0; border: 1px solid var(--line); border-radius: var(--r); background: var(--white); color: var(--ink); cursor: pointer; }
.nav-toggle svg { width: 20px; height: 20px; }
.anav { display: none; }
.hd__tel { display: none; }
@media (max-width: 1019px) {
  .hd .btn { display: none; }
  .anav { position: absolute; top: 100%; left: 0; right: 0; flex-direction: column; padding: 0.4rem 1rem 1.3rem; background: var(--white); border-bottom: 1px solid var(--line); box-shadow: 0 16px 30px -22px rgba(31,27,43,0.6); }
  .anav.is-open { display: flex; }
  .anav a { padding: 0.85rem 0.2rem; border-bottom: 1px solid var(--line); color: var(--ink); font-family: var(--serif); font-size: 1.15rem; text-decoration: none; }
  .anav a[aria-current="page"] { color: var(--brass-dark); }
}
@media (max-width: 380px) { .ah-logo i { display: none; } }
@media (min-width: 1020px) {
  .hd .wrap { min-height: 82px; gap: 1.4rem; }
  .nav-toggle { display: none; }
  .anav { display: flex; gap: 1.4rem; margin-left: auto; }
  .anav a { padding: 0.25rem 0; color: var(--text); font-weight: 600; text-decoration: none; }
  .anav a:hover { color: var(--ink); }
  .anav a[aria-current="page"] { color: var(--ink); box-shadow: inset 0 -2px 0 var(--brass); }
  .hd__tel { display: inline-flex; align-items: center; gap: 0.4rem; color: var(--ink); font-weight: 700; text-decoration: none; white-space: nowrap; }
  .hd__tel svg { width: 17px; height: 17px; color: var(--brass-dark); }
  .hd .btn { display: inline-flex; }
}

/* 04 Call strip (mobile) */
.callstrip { position: fixed; left: 0; right: 0; bottom: 0; z-index: 40; display: grid; grid-template-columns: 1fr 1fr; background: var(--violet); box-shadow: 0 -8px 24px -18px rgba(31,27,43,0.9); }
.callstrip a { display: flex; align-items: center; justify-content: center; gap: 0.45rem; padding: 0.95rem 0.5rem; color: #fff; font-weight: 700; font-size: 0.98rem; text-decoration: none; }
.callstrip a + a { background: var(--brass-dark); }
.callstrip svg { width: 17px; height: 17px; }
.callstrip a:focus-visible { outline: 3px solid #fff; outline-offset: -5px; }
@media (min-width: 1020px) { .callstrip { display: none; } }

/* 05 Buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem; padding: 0.8rem 1.4rem; border: 0; border-radius: 99px; background: var(--violet); color: #fff; font: inherit; font-weight: 700; line-height: 1.3; text-decoration: none; white-space: nowrap; cursor: pointer; transition: background-color 0.2s, color 0.2s; }
.btn:hover { background: var(--ink); color: #fff; }
.btn svg { width: 1.05em; height: 1.05em; flex: none; }
.btn--brass { background: var(--brass-dark); }
.btn--brass:hover { background: var(--ink); }
.btn--line { background: transparent; color: var(--violet); box-shadow: inset 0 0 0 1.5px var(--violet); }
.btn--line:hover { background: var(--violet); color: #fff; }
.btn--paper, .phead a.btn--paper, .sec--violet a.btn--paper { background: var(--paper); color: var(--ink); }
.btn--paper:hover, .phead a.btn--paper:hover, .sec--violet a.btn--paper:hover { background: #fff; color: var(--ink); }
.btns { display: flex; flex-wrap: wrap; gap: 0.7rem; margin-top: 1.5rem; }

/* 06 Hero */
.hero { padding-block: clamp(2.6rem, 2rem + 3vw, 4.4rem) var(--pad-y); }
.hero__lead { max-width: 760px; }
.hero h1 { max-width: 16ch; }
.hero p.lede { font-size: var(--f1); line-height: 1.55; color: var(--ink); max-width: 46ch; }
.hero figure { margin-top: 2.6rem; }
.hero img, .hero .img-placeholder { width: 100%; aspect-ratio: 21 / 9; object-fit: cover; border-radius: var(--r); }
.ticks { display: grid; gap: 1.4rem; margin-top: 2.6rem; padding: 1.6rem 0 0; border-top: 1px solid var(--line); list-style: none; }
@media (min-width: 720px) { .ticks { grid-template-columns: repeat(3, 1fr); gap: 2rem; } }
.ticks b { display: block; font-family: var(--serif); font-size: 1.12rem; color: var(--ink); }
.ticks span { font-size: var(--f-sm); }

/* 07 Page heads */
.phead { padding-block: clamp(2.4rem, 1.9rem + 2.6vw, 3.8rem); background: var(--violet-soft); }
.phead h1 { max-width: 20ch; }
.phead p { font-size: 1.06rem; max-width: 56ch; }
.crumbs { display: flex; flex-wrap: wrap; gap: 0.5rem; margin: 0 0 1rem; padding: 0; list-style: none; font-size: 0.85rem; color: var(--muted); }
.crumbs li + li::before { content: "›"; margin-right: 0.5rem; }

/* 08 Sections */
.sec { padding-block: var(--pad-y); }
.sec--white { background: var(--white); }
.sec--paper { background: var(--paper-2); }
.sec--violet { background: var(--violet); color: #d5cee6; }
.sec--violet h2, .sec--violet h3, .sec--violet b { color: #fff; }
.sec--violet .over { color: #e6c88a; }
.sec--violet a:not(.btn) { color: #fff; }
.sec--violet :focus-visible { outline-color: #e6c88a; }
.head { max-width: 620px; margin-bottom: 2.4rem; }
.duo { display: grid; gap: 2rem; }
@media (min-width: 860px) { .duo { grid-template-columns: 1fr 1fr; gap: 3rem; } }
.duo section { padding-top: 1.2rem; border-top: 3px solid var(--violet); }
.duo section + section { border-top-color: var(--brass); }
.duo ul { margin: 1rem 0 1.4rem; padding: 0; list-style: none; font-size: var(--f-sm); }
.duo li { position: relative; padding: 0.4rem 0 0.4rem 1.4rem; }
.duo li::before { content: ""; position: absolute; left: 0; top: 1.05rem; width: 7px; height: 7px; border-radius: 50%; background: var(--brass); }
.split { display: grid; gap: 2.2rem; align-items: center; }
@media (min-width: 900px) { .split { grid-template-columns: 1fr 1fr; gap: 3.2rem; } .split--flip > :first-child { order: 2; } }
.split > * { min-width: 0; }
.split img, .split .img-placeholder { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; border-radius: var(--r); }
.stack { margin: 0; padding: 0; list-style: none; counter-reset: s; }
.stack li { position: relative; padding: 1.1rem 0 1.1rem 3rem; border-bottom: 1px solid var(--line); }
.stack li::before { counter-increment: s; content: counter(s); position: absolute; left: 0; top: 1.1rem; display: grid; place-items: center; width: 1.9rem; height: 1.9rem; border-radius: 50%; background: var(--violet-soft); color: var(--violet); font-size: 0.85rem; font-weight: 700; }
.sec--violet .stack li { border-bottom-color: rgba(255,255,255,0.18); }
.sec--violet .stack li::before { background: rgba(255,255,255,0.14); color: #fff; }
.stack b { display: block; font-family: var(--serif); font-size: 1.1rem; }
.cards { display: grid; gap: 1rem; margin: 0; padding: 0; list-style: none; }
@media (min-width: 720px) { .cards { grid-template-columns: repeat(2, 1fr); } }
.cards li { padding: 1.4rem; background: var(--white); border: 1px solid var(--line); border-radius: var(--r); font-size: var(--f-sm); }
.sec--white .cards li { background: var(--paper-2); border-color: transparent; }
.cards b { display: block; font-family: var(--serif); font-size: 1.08rem; color: var(--ink); }
.map { display: block; width: 100%; height: clamp(300px, 34vw, 400px); border-radius: var(--r); background: var(--violet-soft); }
.where { display: grid; gap: 2rem; align-items: center; }
@media (min-width: 880px) { .where { grid-template-columns: 0.9fr 1.1fr; gap: 3rem; } }

/* 09 Noise guide (signature) */
.noise { display: grid; gap: 1.8rem; }
@media (min-width: 900px) { .noise { grid-template-columns: 0.95fr 1.05fr; gap: 3rem; align-items: start; } }
.sounds { display: grid; gap: 0.7rem; margin: 0; padding: 0; border: 0; }
.sounds legend { margin-bottom: 0.8rem; padding: 0; font-family: var(--serif); font-size: 1.25rem; color: var(--ink); }
.snd { position: relative; }
.snd input { position: absolute; opacity: 0; }
.snd span { display: block; padding: 1rem 1.1rem; background: var(--white); border: 1px solid var(--line); border-radius: var(--r); color: var(--ink); cursor: pointer; }
.snd span b { display: block; font-family: var(--serif); font-size: 1.1rem; }
.snd span i { display: block; font-style: normal; font-size: var(--f-sm); color: var(--muted); }
.snd input:checked + span { border-color: var(--violet); background: var(--violet-soft); box-shadow: inset 0 0 0 1px var(--violet); }
.snd input:checked + span i { color: var(--violet-2); }
.snd input:focus-visible + span { outline: 3px solid var(--focus); outline-offset: 2px; }
.verdict { position: sticky; top: 92px; padding: clamp(1.4rem, 1rem + 2vw, 2.2rem); background: var(--violet); color: #d5cee6; border-radius: var(--r); }
.verdict h2 { color: #fff; font-size: 1.25rem; }
.verdict .who { display: inline-block; margin-bottom: 0.8rem; padding: 0.3rem 0.8rem; border-radius: 99px; background: #e6c88a; color: var(--ink); font-size: 0.78rem; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; }
.verdict .lead { font-family: var(--serif); font-size: clamp(1.3rem, 1.1rem + 0.9vw, 1.7rem); color: #fff; line-height: 1.3; }
.verdict ul { margin: 1rem 0 0; padding-left: 1.2em; font-size: var(--f-sm); }
.verdict li { margin-bottom: 0.4rem; }
.verdict :focus-visible { outline-color: #e6c88a; }
.safety { margin-top: 1.2rem; padding: 1rem 1.1rem; background: rgba(255,255,255,0.1); border-left: 3px solid #e6c88a; border-radius: 0 var(--r) var(--r) 0; font-size: var(--f-sm); }
.safety b { color: #fff; }

/* 10 FAQ */
.faq { display: grid; gap: 0.7rem; max-width: 860px; }
.aq { padding: 0.3rem 1.2rem; background: var(--white); border: 1px solid var(--line); border-radius: var(--r); }
.aq summary { display: flex; justify-content: space-between; gap: 1rem; padding: 0.95rem 0; font-family: var(--serif); font-size: 1.1rem; color: var(--ink); list-style: none; cursor: pointer; }
.aq summary::after { content: "+"; flex: none; font-family: var(--sans); font-weight: 700; color: var(--brass-dark); }
.aq[open] summary::after { content: "–"; }
.aq > div { padding: 0 0 1rem; }

/* 11 Form & contact */
.form { display: grid; gap: 1.1rem 1.4rem; 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: 0.95rem; }
.req { color: var(--err); }
.opt { font-weight: 400; color: var(--muted); }
input[type="text"], input[type="tel"], input[type="email"], select, textarea { width: 100%; padding: 0.8rem 0.95rem; font: inherit; color: var(--ink); background: var(--white); border: 1px solid #d6cfc3; 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='%233b2a63' stroke-width='2.6'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 0.9rem center; background-size: 15px; padding-right: 2.4rem; }
textarea { min-height: 140px; resize: vertical; }
input:focus, select:focus, textarea:focus { border-color: var(--violet); }
.picks { margin: 0; padding: 0; border: 0; display: flex; flex-direction: row; flex-wrap: wrap; gap: 0.5rem; }
.picks legend { margin-bottom: 0.5rem; padding: 0; }
.pick { position: relative; }
.pick input { position: absolute; opacity: 0; }
.pick span { display: inline-block; padding: 0.5rem 0.95rem; border: 1px solid #d6cfc3; border-radius: 99px; background: var(--white); font-size: var(--f-sm); cursor: pointer; }
.pick input:checked + span { background: var(--violet); border-color: var(--violet); color: #fff; }
.pick input:focus-visible + span { outline: 3px solid var(--focus); outline-offset: 2px; }
.form-note { margin: 0.5rem 0 0; font-size: 0.85rem; color: var(--muted); }
.contact { display: grid; gap: 2.4rem; align-items: start; }
@media (min-width: 920px) { .contact { grid-template-columns: 0.85fr 1.15fr; gap: 3.2rem; } .contact > :first-child { order: 2; } }
.contact > * { min-width: 0; }
.side { display: grid; gap: 1rem; }
.side__card { padding: 1.4rem 1.5rem; background: var(--white); border: 1px solid var(--line); border-radius: var(--r); }
.side__card h2 { font-size: 1.1rem; }
.side__card .big { display: block; margin: 0.2rem 0 0.3rem; font-family: var(--serif); font-size: 1.5rem; color: var(--ink); text-decoration: none; }

/* 12 Footer */
.ft { background: var(--violet); color: #cdc5e0; font-size: var(--f-sm); }
.ft a { color: #fff; }
.ft :focus-visible { outline-color: #e6c88a; }
.ft__row { display: grid; gap: 1.6rem; padding-block: 3rem 1.8rem; }
@media (min-width: 820px) { .ft__row { grid-template-columns: 1.5fr 1fr 1fr; } }
.ft__name { margin: 0 0 0.5rem; font-family: var(--serif); font-size: 1.3rem; color: #fff; }
.ft h2 { margin: 0 0 0.6rem; font-family: var(--sans); font-size: 0.76rem; letter-spacing: 0.14em; text-transform: uppercase; color: #e6c88a; }
.ft ul { margin: 0; padding: 0; list-style: none; display: grid; gap: 0.35rem; }
.ft__base { padding-block: 1rem 5rem; border-top: 1px solid rgba(255,255,255,0.15); font-size: 0.82rem; }
@media (min-width: 1020px) { .ft__base { padding-bottom: 1rem; } }

/* 13 Images */
figure { margin: 0; }
.img-placeholder { background: var(--violet-soft); border: 1px dashed #c3b6de; border-radius: var(--r); color: var(--muted); }
.img-placeholder b { color: var(--ink); }