/* 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; } }

/* ==========================================================================
   SharpLine Colorworks & HVAC — sharplinehvac.xyz
   Cobalt, lime and cool white; angled edges; a squared display face.
   01 Tokens · 02 Base · 03 Header · 04 Bottom bar (mobile) · 05 Buttons
   06 Hero · 07 Page heads · 08 Sections · 09 Air cleaners (signature)
   10 FAQ · 11 Form & contact · 12 Footer · 13 Images
   ========================================================================== */

/* 01 Tokens */
:root {
  --cobalt: #1f3fb5; --cobalt-dark: #152c80; --cobalt-soft: #e9edfb;
  --lime: #c8f03c; --lime-soft: #f3fcd6;
  --white: #ffffff; --cool: #f5f6fa; --ink: #0e1433; --text: #394060; --muted: #5a6180; --line: #dde0ec;
  --focus: #1f3fb5; --err: #b3261e; --ok: #1f6b3d;
  --display: "Tomorrow", "Bahnschrift", "DIN Alternate", system-ui, sans-serif;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --f-sm: 0.92rem; --f0: clamp(1rem, 0.97rem + 0.15vw, 1.06rem); --f1: clamp(1.2rem, 1.08rem + 0.5vw, 1.5rem);
  --f2: clamp(1.8rem, 1.35rem + 1.9vw, 2.8rem); --f3: clamp(2.3rem, 1.5rem + 3.6vw, 4.4rem);
  --slant: 4vw; --wrap: 1180px; --pad-y: clamp(3.2rem, 2.4rem + 4vw, 6rem);
}

/* 02 Base */
body { background: var(--white); color: var(--text); font-family: var(--sans); font-size: var(--f0); line-height: 1.65; }
h1, h2, h3 { margin: 0 0 0.5em; font-family: var(--display); color: var(--ink); font-weight: 600; line-height: 1.1; text-wrap: balance; }
h1 { font-size: var(--f3); }
h2 { font-size: var(--f2); }
h3 { font-size: var(--f1); font-weight: 500; }
p { margin: 0 0 1em; max-width: 64ch; }
p:last-child { margin-bottom: 0; }
a { color: var(--cobalt); text-underline-offset: 3px; }
a:hover { color: var(--ink); }
strong, b { color: var(--ink); font-weight: 650; }
ul, ol { margin: 0 0 1em; padding-left: 1.2em; }
.wrap { width: min(100% - 2rem, var(--wrap)); margin-inline: auto; }
.label { display: inline-block; margin-bottom: 0.9rem; font-family: var(--display); font-size: 0.85rem; font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase; color: var(--cobalt); }
.label::before { content: "/ "; color: var(--muted); }
.mt { margin-top: 2rem; }

/* 03 Header */
.hd { position: sticky; top: 0; z-index: 30; background: var(--cobalt); color: #fff; }
.hd .wrap { display: flex; align-items: center; justify-content: space-between; gap: 1rem; min-height: 68px; }
.sl-logo { display: inline-flex; align-items: center; gap: 0.6rem; color: #fff; text-decoration: none; }
.sl-logo svg { width: 34px; height: 34px; flex: none; }
.sl-logo b { color: #fff; display: block; font-family: var(--display); font-size: 1.35rem; font-weight: 700; letter-spacing: 0.01em; line-height: 1; }
.sl-logo small { display: block; margin-top: 0.2rem; font-size: 0.72rem; color: #cfd8ff; }
.hd :focus-visible { outline-color: var(--lime); }
.nav-toggle { display: inline-flex; align-items: center; gap: 0.4rem; flex: none; min-height: 44px; padding: 0 0.9rem; border: 2px solid rgba(255,255,255,0.5); background: transparent; color: #fff; font: inherit; font-weight: 650; cursor: pointer; }
.nav-toggle svg { width: 20px; height: 20px; }
.snav, .hd__end { display: none; }
@media (max-width: 999px) {
  .snav { position: absolute; top: 100%; left: 0; right: 0; flex-direction: column; padding: 0.6rem 1rem 1.2rem; background: var(--cobalt-dark); }
  .snav.is-open { display: flex; }
  .snav a { padding: 0.85rem 0.4rem; border-bottom: 1px solid rgba(255,255,255,0.14); color: #fff; font-family: var(--display); font-size: 1.2rem; text-decoration: none; }
  .snav a[aria-current="page"] { color: var(--lime); }
}
@media (min-width: 1000px) {
  .nav-toggle { display: none; }
  .snav { display: flex; gap: 1.6rem; margin-left: auto; }
  .snav a { padding: 0.4rem 0; color: #fff; font-weight: 600; text-decoration: none; border-bottom: 3px solid transparent; }
  .snav a:hover { border-bottom-color: rgba(200,240,60,0.5); }
  .snav a[aria-current="page"] { border-bottom-color: var(--lime); }
  .hd__end { display: flex; align-items: center; gap: 1rem; margin-left: 1.6rem; }
  .hd__tel { color: #fff; font-family: var(--display); font-weight: 600; text-decoration: none; white-space: nowrap; }
}

/* 04 Bottom bar (mobile) — a diagonal two-tone split */
.bar { position: fixed; left: 0; right: 0; bottom: 0; z-index: 40; display: grid; grid-template-columns: 1fr 1fr; height: 58px; box-shadow: 0 -6px 18px -8px rgba(14,20,51,0.45); }
.bar a { display: flex; align-items: center; justify-content: center; gap: 0.5rem; font-family: var(--display); font-weight: 700; font-size: 1.02rem; text-decoration: none; }
.bar svg { width: 19px; height: 19px; flex: none; }
.bar__call { background: var(--cobalt); color: #fff; clip-path: polygon(0 0, 100% 0, calc(100% - 20px) 100%, 0 100%); margin-right: -20px; padding-right: 20px; }
.bar__book { background: var(--lime); color: var(--ink); clip-path: polygon(20px 0, 100% 0, 100% 100%, 0 100%); margin-left: -2px; padding-left: 20px; }
.bar :focus-visible { outline: 3px solid var(--ink); outline-offset: -6px; }
.bar__call:focus-visible { outline-color: var(--lime); }
body { padding-bottom: 58px; }
@media (min-width: 1000px) { .bar { display: none; } body { padding-bottom: 0; } }

/* 05 Buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 0.55rem; padding: 0.9rem 1.5rem; border: 0; background: var(--cobalt); color: #fff; font-family: var(--display); font-size: 1rem; font-weight: 600; text-decoration: none; cursor: pointer; clip-path: polygon(0 0, 100% 0, calc(100% - 12px) 100%, 0 100%); padding-right: 1.9rem; transition: background-color 0.2s, color 0.2s; }
.btn:hover { background: var(--ink); color: #fff; }
.btn svg { width: 1.1em; height: 1.1em; flex: none; }
.btn--lime { background: var(--lime); color: var(--ink); }
.btn--lime:hover { background: #fff; color: var(--ink); }
.btn--line { background: var(--cobalt-soft); color: var(--cobalt-dark); }
.btn--line:hover { background: var(--cobalt); color: #fff; }
.btns { display: flex; flex-wrap: wrap; gap: 0.7rem; margin-top: 1.6rem; }

/* 06 Hero */
.hero { padding-top: clamp(2.8rem, 2.2rem + 3vw, 5rem); background: var(--cool); }
.hero__text { display: grid; gap: 1.6rem; }
@media (min-width: 900px) { .hero__text { grid-template-columns: 1.4fr 0.6fr; align-items: end; gap: 3rem; } }
.hero h1 { max-width: 16ch; }
.hero p.lede { font-size: var(--f1); line-height: 1.5; color: var(--ink); max-width: 34ch; }
.hero__img { margin-top: clamp(2rem, 1.6rem + 2vw, 3.2rem); }
.hero__img img, .hero__img .img-placeholder { width: 100%; aspect-ratio: 16 / 9; max-height: 620px; object-fit: cover; clip-path: polygon(0 var(--slant), 100% 0, 100% 100%, 0 100%); }

/* 07 Page heads */
.phead { padding-block: clamp(2.6rem, 2rem + 3vw, 4.4rem) calc(clamp(2.2rem, 1.8rem + 2vw, 3.4rem) + var(--slant)); background: var(--cobalt); color: #dbe2ff; clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--slant)), 0 100%); }
.phead h1 { color: #fff; font-size: clamp(2.1rem, 1.5rem + 2.6vw, 3.5rem); max-width: 20ch; }
.phead p { font-size: 1.1rem; max-width: 56ch; }
.phead a { color: #fff; }
.phead :focus-visible { outline-color: var(--lime); }
.crumbs { display: flex; flex-wrap: wrap; gap: 0.5rem; margin: 0 0 1.1rem; padding: 0; list-style: none; font-size: 0.86rem; }
.crumbs li + li::before { content: "/"; margin-right: 0.5rem; color: var(--lime); }

/* 08 Sections */
.sec { padding-block: var(--pad-y); }
.sec--cool { background: var(--cool); }
.sec--lime { background: var(--lime); }
.sec--lime .label { color: var(--ink); }
.sec--lime .label::before { color: var(--ink); }
.sec--cobalt { background: var(--cobalt); color: #dbe2ff; }
.sec--cobalt h2, .sec--cobalt h3, .sec--cobalt b { color: #fff; }
.sec--cobalt a:not(.btn) { color: #fff; }
.sec--cobalt .label { color: var(--lime); }
.sec--cobalt .label::before { color: #cfd8ff; }
.sec--cobalt :focus-visible { outline-color: var(--lime); }
.panels { display: grid; gap: 1rem; }
@media (min-width: 880px) { .panels { grid-template-columns: 1fr 1fr; gap: 0; } }
.panel { display: flex; flex-direction: column; padding: clamp(1.6rem, 1.2rem + 2vw, 2.8rem); background: var(--white); border: 1px solid var(--line); }
.panel figure { margin: calc(-1 * clamp(1.6rem, 1.2rem + 2vw, 2.8rem)) calc(-1 * clamp(1.6rem, 1.2rem + 2vw, 2.8rem)) 1.6rem; }
.panel img, .panel .img-placeholder { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; }
.panel ul { margin: 0.4rem 0 1.4rem; padding: 0; list-style: none; }
.panel li { padding: 0.5rem 0 0.5rem 1.4rem; border-bottom: 1px solid var(--line); position: relative; }
.panel li::before { content: ""; position: absolute; left: 0; top: 1.05rem; width: 10px; height: 2px; background: var(--cobalt); transform: skewY(-20deg); }
.panel .btns { margin-top: auto; padding-top: 0.4rem; }
.panel--dark { background: var(--cobalt); border-color: var(--cobalt); color: #dbe2ff; }
.panel--dark h2, .panel--dark b { color: #fff; }
.panel--dark .label { color: var(--lime); }
.panel--dark .label::before { color: #cfd8ff; }
.panel--dark li { border-bottom-color: rgba(255,255,255,0.16); }
.panel--dark li::before { background: var(--lime); }
.panel--dark :focus-visible { outline-color: var(--lime); }
@media (min-width: 880px) { .panel { clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%); } .panel--dark { margin-top: 3rem; } }
.checks { display: grid; gap: 1.2rem; margin: 0; padding: 0; list-style: none; counter-reset: c; }
@media (min-width: 820px) { .checks { grid-template-columns: repeat(3, 1fr); gap: 2rem; } }
.checks li { counter-increment: c; padding-top: 1rem; border-top: 3px solid var(--ink); }
.checks li::before { content: "0" counter(c); display: block; margin-bottom: 0.4rem; font-family: var(--display); font-size: 2.2rem; font-weight: 700; color: var(--ink); line-height: 1; }
.checks h3 { font-size: 1.2rem; margin-bottom: 0.3rem; }
.steps { display: grid; gap: 0.6rem; margin: 0; padding: 0; list-style: none; }
@media (min-width: 880px) { .steps { grid-template-columns: repeat(4, 1fr); gap: 0; } }
.steps li { padding: 1.4rem 1.6rem; background: var(--white); border: 1px solid var(--line); }
@media (min-width: 880px) { .steps li { clip-path: polygon(0 0, calc(100% - 18px) 0, 100% 50%, calc(100% - 18px) 100%, 0 100%, 18px 50%); padding-inline: 2.2rem; } .steps li:first-child { clip-path: polygon(0 0, calc(100% - 18px) 0, 100% 50%, calc(100% - 18px) 100%, 0 100%); } }
.steps b { display: block; font-family: var(--display); font-size: 1.15rem; margin-bottom: 0.2rem; }
.steps span { font-size: var(--f-sm); }
.split { display: grid; gap: 2.4rem; align-items: center; }
@media (min-width: 900px) { .split { grid-template-columns: 1fr 1fr; gap: 3.6rem; } }
.split > * { min-width: 0; }
.split img, .split .img-placeholder { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; }
.svc-list { margin: 0; padding: 0; list-style: none; border-top: 1px solid var(--line); }
.svc-list li { display: grid; gap: 0.2rem; padding: 1.1rem 0; border-bottom: 1px solid var(--line); }
@media (min-width: 700px) { .svc-list li { grid-template-columns: 14rem 1fr; gap: 1.6rem; } }
.svc-list b { font-family: var(--display); font-weight: 600; font-size: 1.1rem; }
.map { display: block; width: 100%; height: clamp(300px, 34vw, 420px); background: var(--cobalt-soft); }
.callband { display: grid; gap: 2rem; align-items: center; }
@media (min-width: 900px) { .callband { grid-template-columns: 1fr 1fr; gap: 3rem; } }
.callband .big { display: inline-block; margin: 0.3rem 0 0.8rem; color: #fff; font-family: var(--display); font-size: clamp(2.2rem, 1.6rem + 2.6vw, 3.6rem); font-weight: 700; text-decoration: none; }

/* 09 Air cleaners (signature) */
.picker { display: grid; gap: 2rem; align-items: start; }
@media (min-width: 940px) { .picker { grid-template-columns: 0.8fr 1.2fr; gap: 3rem; } }
.goals { margin: 0; padding: 0; border: 0; display: grid; gap: 0.5rem; }
.goals legend { margin-bottom: 0.8rem; padding: 0; font-family: var(--display); font-size: 1.25rem; font-weight: 600; color: var(--ink); }
.goal { position: relative; }
.goal input { position: absolute; opacity: 0; }
.goal span { display: block; padding: 0.9rem 1.1rem 0.9rem 2.8rem; background: var(--white); border: 1px solid var(--line); cursor: pointer; font-weight: 600; color: var(--ink); }
.goal span::before { content: ""; position: absolute; left: 1rem; top: 50%; width: 16px; height: 16px; margin-top: -8px; border: 2px solid var(--cobalt); transform: skewX(-12deg); }
.goal input:checked + span { background: var(--cobalt); border-color: var(--cobalt); color: #fff; }
.goal input:checked + span::before { background: var(--lime); border-color: var(--lime); }
.goal input:focus-visible + span { outline: 3px solid var(--focus); outline-offset: 2px; }
.answers { display: grid; gap: 1rem; }
.answer { padding: clamp(1.4rem, 1rem + 1.6vw, 2.2rem); background: var(--white); border: 1px solid var(--line); border-top: 4px solid var(--cobalt); }
.answer h3 { font-size: 1.35rem; }
.answer ul { margin: 0.6rem 0 0; }
.is-js .answer:not(.is-on) { display: none; }
.cadr { display: flex; flex-wrap: wrap; align-items: end; gap: 0.8rem 1.2rem; margin-top: 1.2rem; padding: 1rem 1.2rem; background: var(--lime-soft); }
.cadr label { display: block; font-weight: 650; color: var(--ink); font-size: 0.92rem; }
.cadr input { width: 8rem; }
.cadr output { font-family: var(--display); font-size: 1.15rem; font-weight: 600; color: var(--ink); }
.types { display: grid; gap: 1rem; }
@media (min-width: 760px) { .types { grid-template-columns: 1fr 1fr; } }
.type { padding: 1.5rem; background: var(--white); border: 1px solid var(--line); }
.type h3 { font-size: 1.2rem; margin-bottom: 0.3rem; }
.type p { margin: 0; font-size: var(--f-sm); }
.type .flag { display: inline-block; margin-bottom: 0.6rem; padding: 0.15rem 0.55rem; font-size: 0.76rem; font-weight: 700; letter-spacing: 0.06em; text-transform: uppercase; background: var(--cobalt-soft); color: var(--cobalt-dark); }
.type .flag--carb { background: var(--lime-soft); color: #3d4d00; }
.law { padding: clamp(1.4rem, 1rem + 2vw, 2.4rem); background: var(--ink); color: #d7dbef; }
.law h2 { color: #fff; font-size: clamp(1.5rem, 1.2rem + 1.2vw, 2.1rem); }
.law a { color: var(--lime); }
.law :focus-visible { outline-color: var(--lime); }

/* 10 FAQ */
.faq { max-width: 860px; display: grid; gap: 0.5rem; }
.sq { background: var(--white); border-left: 4px solid var(--cobalt); }
.sq summary { display: flex; justify-content: space-between; gap: 1rem; padding: 1.05rem 1.2rem; font-family: var(--display); font-weight: 600; font-size: 1.08rem; color: var(--ink); list-style: none; }
.sq summary::after { content: "+"; flex: none; font-size: 1.4rem; line-height: 1; color: var(--cobalt); }
.sq[open] summary::after { content: "–"; }
.sq[open] { border-left-color: var(--lime); }
.sq > div { padding: 0 1.2rem 1.2rem; }

/* 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: 650; 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"], input[type="number"], select, textarea { width: 100%; padding: 0.8rem 0.95rem; font: inherit; color: var(--ink); background: var(--white); border: 1px solid #b9bfd6; border-radius: 0; }
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='%231f3fb5' 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(--cobalt); }
.picks { margin: 0; padding: 0; border: 0; display: flex; 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 0.9rem; border: 1px solid #b9bfd6; background: var(--white); font-size: var(--f-sm); cursor: pointer; }
.pick input:checked + span { background: var(--cobalt); border-color: var(--cobalt); 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: 2.6rem; }
@media (min-width: 920px) { .contact { grid-template-columns: 1.2fr 0.8fr; gap: 3.6rem; } }
.contact > * { min-width: 0; }
.facts { margin: 0; padding: 0; list-style: none; }
.facts li { padding: 1rem 0; border-bottom: 1px solid var(--line); }
.facts b { display: block; font-family: var(--display); font-size: 0.85rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--cobalt); }
.facts .tel { font-family: var(--display); font-size: 1.8rem; font-weight: 700; color: var(--ink); text-decoration: none; }

/* 12 Footer */
.ft { background: var(--ink); color: #b9bfd6; font-size: var(--f-sm); }
.ft a { color: #fff; }
.ft :focus-visible { outline-color: var(--lime); }
.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(--display); font-size: 1.5rem; font-weight: 700; color: #fff; }
.ft h2 { margin: 0 0 0.6rem; font-family: var(--display); font-size: 0.85rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--lime); }
.ft ul { margin: 0; padding: 0; list-style: none; display: grid; gap: 0.35rem; }
.ft__base { padding-block: 1rem; border-top: 1px solid rgba(255,255,255,0.12); font-size: 0.82rem; }

/* 13 Images */
.img-placeholder { background: var(--cobalt-soft); border: 1px dashed #9aa6d8; color: var(--muted); }
.img-placeholder b { color: var(--ink); }