/* ==========================================================
   Citrus Air Testing: styles
   Mobile-first. Palette taken from the Pinterest reference
   (green + yellow cleaning-service design). Change colors here only.
   All text/background pairs below were checked for WCAG AA (4.5:1).
   ========================================================== */

:root {
  --yellow:      #F5D90A;  /* buttons, highlights (dark text on top: 9.1:1) */
  --yellow-dark: #E0C500;  /* button hover */
  --green:       #3BA52C;  /* decorative only: icons, lines (not for small text) */
  --green-mid:   #277A1B;  /* white text on this: 5.4:1 */
  --green-link:  #1F6B1A;  /* links/accents on white: 6.6:1 */
  --green-deep:  #14391A;  /* body text, footer: 12.9:1 on white */
  --mint:        #E5F4D3;  /* soft backgrounds */
  --cream:       #F8FAF2;  /* alternate section background */
  --white:       #FFFFFF;
  --muted:       #4A5D4B;  /* secondary text: 7.1:1 on white */
  --border:      #D5E5C2;
  --field-border:#5F7F5E;  /* form outlines (3:1 or better) */
  --placeholder-bg: #FFF6B8;

  --radius: 18px;
  --shadow: 0 6px 20px rgba(20, 57, 26, .08);
  --max: 1120px;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 84px; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 1.0625rem;
  line-height: 1.6;
  color: var(--green-deep);
  background: var(--white);
  padding-bottom: 76px; /* room for the mobile sticky button */
}
img, svg { max-width: 100%; height: auto; display: block; }
a { color: var(--green-link); }
a:hover { color: var(--green-deep); }
h1, h2, h3 { line-height: 1.2; margin: 0 0 .6em; color: var(--green-deep); }
h1 { font-size: clamp(2rem, 7vw, 3.1rem); letter-spacing: -.02em; }
h2 { font-size: clamp(1.6rem, 5vw, 2.3rem); letter-spacing: -.01em; }
h3 { font-size: 1.15rem; }
p { margin: 0 0 1em; }
ul, ol { margin: 0; padding: 0; }

:focus-visible { outline: 3px solid var(--green-deep); outline-offset: 3px; border-radius: 4px; }

.container { width: 100%; max-width: var(--max); margin: 0 auto; padding: 0 20px; }
.container.narrow { max-width: 780px; }
.visually-hidden { position: absolute !important; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.skip-link { position: absolute; left: -999px; top: 8px; background: var(--yellow); color: var(--green-deep); padding: 10px 16px; border-radius: 8px; z-index: 100; font-weight: 700; }
.skip-link:focus { left: 8px; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 48px; padding: 12px 26px;
  background: var(--yellow); color: var(--green-deep);
  font: inherit; font-weight: 700; text-decoration: none; text-align: center;
  border: 2px solid var(--yellow); border-radius: 999px; cursor: pointer;
  box-shadow: 0 3px 0 rgba(20, 57, 26, .18);
  transition: background .15s, transform .15s;
}
.btn:hover { background: var(--yellow-dark); border-color: var(--yellow-dark); color: var(--green-deep); transform: translateY(-1px); }
.btn-small { min-height: 44px; padding: 8px 20px; }
.btn-large { min-height: 54px; padding: 14px 32px; font-size: 1.1rem; }
.btn-block { width: 100%; }
.btn-outline { background: transparent; border-color: var(--green-deep); box-shadow: none; }
.btn-outline:hover { background: var(--green-deep); border-color: var(--green-deep); color: var(--white); }

/* ---------- Header ---------- */
.site-header { position: sticky; top: 0; z-index: 50; background: var(--white); border-bottom: 1px solid var(--border); }
.header-inner { display: flex; align-items: center; justify-content: space-between; min-height: 68px; position: relative; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--green-deep); font-size: 1.15rem; }
.brand strong { color: var(--green-link); }
.nav-toggle { background: none; border: 2px solid var(--green-deep); border-radius: 12px; width: 48px; height: 48px; display: grid; place-items: center; color: var(--green-deep); cursor: pointer; }
.site-nav { display: none; position: absolute; top: 100%; left: 0; right: 0; background: var(--white); border-bottom: 1px solid var(--border); padding: 12px 20px 20px; box-shadow: var(--shadow); }
.site-nav.open { display: block; }
.site-nav ul { list-style: none; display: grid; gap: 4px; }
.site-nav a:not(.btn) { display: block; padding: 12px 4px; color: var(--green-deep); text-decoration: none; font-weight: 600; }
.site-nav a:not(.btn):hover { color: var(--green-link); text-decoration: underline; }
.site-nav .btn { margin-top: 8px; width: 100%; }

/* ---------- Hero ---------- */
.hero { background: linear-gradient(180deg, var(--mint) 0%, var(--cream) 100%); padding: 36px 0 48px; }
.hero-grid { display: grid; gap: 28px; align-items: center; }
.eyebrow { display: inline-block; margin: 0 0 12px; padding: 4px 12px; background: var(--yellow); color: var(--green-deep); font-size: .85rem; font-weight: 700; border-radius: 999px; }
.lead { font-size: 1.15rem; color: var(--muted); max-width: 40em; }
.hero-actions { display: grid; gap: 12px; margin: 24px 0; }
.check-list { list-style: none; display: grid; gap: 8px; }
.check-list li { position: relative; padding-left: 32px; font-weight: 600; }
.check-list li::before {
  content: ""; position: absolute; left: 0; top: .15em; width: 22px; height: 22px; border-radius: 50%;
  background: var(--green-mid) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='3.2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M6 12.5l4 4 8-9'/%3E%3C/svg%3E") center/70% no-repeat;
}
.hero-art { max-width: 380px; margin: 0 auto; }

/* ---------- Trust bar ---------- */
.trust { background: var(--white); border-bottom: 1px solid var(--border); padding: 20px 0; }
.trust-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.trust-item { display: grid; gap: 2px; padding: 12px 14px; border: 1px solid var(--border); border-radius: 14px; background: var(--cream); font-size: .92rem; line-height: 1.35; }
.trust-item strong { font-size: 1rem; }
.trust-item span { color: var(--muted); }

/* Highlighted so unfinished placeholders are impossible to miss before launch */
.placeholder, .placeholder-block, .placeholder-footer { background: var(--placeholder-bg); border: 2px dashed var(--green-deep); color: var(--green-deep); }
.trust-item.placeholder span { color: var(--green-deep); }
.placeholder-block { padding: 12px 14px; border-radius: 12px; }
.placeholder-footer { padding: 10px 12px; border-radius: 10px; font-size: .92rem; }

/* ---------- Sections ---------- */
.section { padding: 56px 0; }
.section-alt { background: var(--cream); }
.section-green { background: var(--green-mid); color: var(--white); }
.section-green h2, .section-green h3 { color: var(--white); }
.section-green .eyebrow { background: var(--yellow); color: var(--green-deep); }
.section-head { max-width: 640px; margin-bottom: 32px; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.section-head p { color: var(--muted); }

.card-grid { display: grid; gap: 16px; }
.card { background: var(--white); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; box-shadow: var(--shadow); }
.card p { margin: 0; color: var(--muted); }
.icon { display: grid; place-items: center; width: 52px; height: 52px; margin-bottom: 14px; border-radius: 14px; background: var(--mint); color: var(--green-mid); }

.on-green .card { background: var(--mint); border-color: transparent; box-shadow: none; }
.on-green .card h3 { color: var(--green-deep); }
.on-green .card p { color: var(--green-deep); }
.disclaimer { max-width: 700px; margin: 28px auto 0; text-align: center; font-size: .95rem; }

.callout { display: grid; gap: 16px; align-items: center; margin-top: 24px; padding: 24px; background: var(--green-mid); color: var(--white); border-radius: var(--radius); }
.callout h3 { color: var(--white); margin-bottom: .3em; }
.callout p { margin: 0; }

/* ---------- Steps ---------- */
.steps { list-style: none; display: grid; gap: 28px; max-width: 900px; margin: 0 auto; }
.steps li { position: relative; padding-left: 72px; }
.steps li:not(:last-child)::after { content: ""; position: absolute; left: 25px; top: 56px; bottom: -22px; border-left: 3px dotted var(--green); }
.step-num { position: absolute; left: 0; top: 0; display: grid; place-items: center; width: 52px; height: 52px; border-radius: 50%; background: var(--yellow); color: var(--green-deep); font-weight: 800; font-size: 1.3rem; }
.steps p { margin: 0; color: var(--muted); }

/* ---------- About ---------- */
.about-grid { display: grid; gap: 28px; align-items: center; }
.about-art { width: 180px; margin: 0 auto; }

/* ---------- FAQ ---------- */
.faq { display: grid; gap: 12px; }
.faq details { background: var(--white); border: 1px solid var(--border); border-radius: 14px; }
.faq summary { list-style: none; cursor: pointer; padding: 16px 52px 16px 18px; font-weight: 700; position: relative; min-height: 52px; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; position: absolute; right: 18px; top: 50%; transform: translateY(-50%); width: 28px; height: 28px; display: grid; place-items: center; border-radius: 50%; background: var(--yellow); font-size: 1.3rem; line-height: 1; }
.faq details[open] summary::after { content: "\2212"; }
.faq details[open] { box-shadow: var(--shadow); }
.faq details p { margin: 0; padding: 0 18px 18px; color: var(--muted); }

/* ---------- Form ---------- */
.form { background: var(--white); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; box-shadow: var(--shadow); }
.form-grid { display: grid; gap: 16px; }
.field { margin: 0 0 16px; border: 0; padding: 0; min-width: 0; }
.form-grid .field { margin: 0; }
label, legend { display: block; font-weight: 700; margin-bottom: 6px; padding: 0; }
.req { color: var(--green-link); }
.opt { font-weight: 400; color: var(--muted); }
input[type="text"], input[type="email"], input[type="tel"], select, textarea {
  width: 100%; min-height: 48px; padding: 10px 14px;
  font: inherit; color: var(--green-deep); background: var(--white);
  border: 2px solid var(--field-border); border-radius: 12px;
}
textarea { resize: vertical; min-height: 120px; }
input:focus-visible, select:focus-visible, textarea:focus-visible { outline: 3px solid var(--yellow); outline-offset: 0; border-color: var(--green-deep); }
.invalid { border-color: #A3261A !important; }
.error-text { display: block; margin-top: 4px; color: #A3261A; font-size: .9rem; font-weight: 600; }
.checks { display: grid; gap: 8px; }
.checks label { display: flex; align-items: center; gap: 12px; margin: 0; padding: 10px 14px; min-height: 48px; font-weight: 600; border: 2px solid var(--border); border-radius: 12px; cursor: pointer; }
.checks input { width: 22px; height: 22px; accent-color: var(--green-mid); flex: none; }
.form-note { margin: 14px 0 0; font-size: .92rem; color: var(--muted); }
.form-status { margin-top: 16px; padding: 14px 16px; border-radius: 12px; background: var(--mint); border: 2px solid var(--green-mid); }
.form-status[hidden] { display: none; }
.form-status.warn { background: var(--placeholder-bg); border-color: var(--green-deep); }
.form-status textarea { margin: 10px 0; min-height: 140px; }
.form-status .btn { margin-right: 8px; }

/* ---------- Footer ---------- */
.site-footer { background: var(--green-deep); color: var(--white); padding: 40px 0 24px; }
.site-footer a { color: var(--yellow); }
.site-footer a:hover { color: var(--white); }
.footer-grid { display: grid; gap: 24px; }
.footer-brand { font-size: 1.25rem; font-weight: 800; margin-bottom: .3em; }
.footer-title { font-weight: 700; margin-bottom: .5em; }
.site-footer ul { list-style: none; display: grid; gap: 4px; }
.footer-legal { margin-top: 28px; padding-top: 18px; border-top: 1px solid rgba(255, 255, 255, .25); font-size: .9rem; }
.footer-legal p { margin: 0 0 .4em; }

/* ---------- Mobile sticky CTA ---------- */
.sticky-cta { position: fixed; left: 0; right: 0; bottom: 0; z-index: 40; padding: 10px 16px calc(10px + env(safe-area-inset-bottom)); background: rgba(255, 255, 255, .96); border-top: 1px solid var(--border); transition: transform .2s; }
.sticky-cta.is-hidden { transform: translateY(110%); }

/* ---------- Tablet / desktop ---------- */
@media (min-width: 640px) {
  .hero-actions { grid-template-columns: auto auto; justify-content: start; }
  .form-grid { grid-template-columns: 1fr 1fr; }
  .checks { grid-template-columns: 1fr 1fr; }
  .checks legend { grid-column: 1 / -1; }
  .form { padding: 36px; }
}

@media (min-width: 860px) {
  body { padding-bottom: 0; font-size: 1.125rem; }
  .sticky-cta { display: none; }

  .nav-toggle { display: none; }
  .site-nav { display: block; position: static; padding: 0; border: 0; box-shadow: none; background: none; }
  .site-nav ul { display: flex; align-items: center; gap: 24px; }
  .site-nav a:not(.btn) { padding: 8px 2px; }
  .site-nav .btn { margin: 0; width: auto; }

  .hero { padding: 64px 0 72px; }
  .hero-grid { grid-template-columns: 1.15fr .85fr; gap: 48px; }
  .hero-art { max-width: 460px; }

  .trust-grid { grid-template-columns: repeat(4, 1fr); }
  .section { padding: 80px 0; }
  .card-grid.three { grid-template-columns: repeat(3, 1fr); }
  .card-grid.four { grid-template-columns: repeat(4, 1fr); }
  .callout { grid-template-columns: 1fr auto; padding: 28px 36px; }

  .steps { grid-template-columns: repeat(3, 1fr); gap: 32px; }
  .steps li { padding: 72px 0 0; text-align: center; }
  .step-num { left: 50%; transform: translateX(-50%); }
  .steps li:not(:last-child)::after { left: calc(50% + 40px); right: calc(-50% + 40px); top: 26px; bottom: auto; border-left: 0; border-top: 3px dotted var(--green); width: auto; }

  .about-grid { grid-template-columns: 220px 1fr; gap: 48px; }
  .about-art { width: 220px; }
  .footer-grid { grid-template-columns: 1.6fr 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; }
}