/* Salt Lake Water Professionals
   Palette: deep-end navy, plunge blue, shallow aqua, salt-flat white,
   reagent yellow (CTA), phenol red (out-of-range readings only). */

:root {
  --deep: #0A2433;
  --deep-2: #0F3246;
  --deep-3: #071A25;
  --plunge: #0D6A87;
  --shallow: #74D3DC;
  --shallow-pale: #E3F1F2;
  --salt: #F2F6F6;
  --white: #FFFFFF;
  --reagent: #F4B731;
  --reagent-dark: #E0A11A;
  --phenol: #E0533D;

  --ink: var(--deep);
  --ink-soft: #46606C;
  --line: #D3DFE1;

  --font-display: "Archivo", "Arial Narrow", system-ui, sans-serif;
  --font-body: "Hanken Grotesk", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;

  --gutter: clamp(16px, 4vw, 40px);
  --max: 1240px;
  --radius: 6px;
  --section-pad: clamp(72px, 10vw, 136px);
}

/* ---------- Base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 88px; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--salt);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; }
p { margin: 0 0 1em; }
p:last-child { margin-bottom: 0; }
h1, h2, h3 { margin: 0; }
ul[role="list"], ol[role="list"] { list-style: none; margin: 0; padding: 0; }
button, input, select, textarea { font: inherit; color: inherit; }

:focus-visible { outline: 3px solid var(--reagent); outline-offset: 3px; border-radius: 2px; }

.skip {
  position: absolute; left: 16px; top: -100px; z-index: 100;
  background: var(--reagent); color: var(--deep); padding: 10px 16px;
  font-weight: 700; text-decoration: none; border-radius: var(--radius);
}
.skip:focus { top: 16px; }

.wrap { max-width: var(--max); margin: 0 auto; padding: 0 var(--gutter); }

/* ---------- Type ---------- */
.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--plunge);
  margin-bottom: 18px;
}
.eyebrow--light { color: var(--shallow); }

.section-title {
  font-family: var(--font-display);
  font-stretch: 74%;
  font-weight: 800;
  font-size: clamp(2.1rem, 4.4vw, 3.5rem);
  line-height: 0.98;
  letter-spacing: -0.01em;
  margin-bottom: 22px;
  text-wrap: balance;
}
.section-title--light { color: var(--white); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  font-family: var(--font-display);
  font-stretch: 88%;
  font-weight: 750;
  font-size: 1rem;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  text-decoration: none;
  padding: 15px 24px;
  border-radius: var(--radius);
  border: 2px solid transparent;
  cursor: pointer;
  transition: background-color .18s ease, color .18s ease, border-color .18s ease, transform .18s ease;
  white-space: nowrap;
}
.btn:active { transform: translateY(1px); }
.btn--sm { padding: 10px 16px; font-size: 0.9rem; }
.btn--block { width: 100%; }
.btn--reagent { background: var(--reagent); color: var(--deep); }
.btn--reagent:hover { background: var(--reagent-dark); }
.btn--ghost { border-color: rgba(255,255,255,.45); color: var(--white); }
.btn--ghost:hover { border-color: var(--white); background: rgba(255,255,255,.08); }
.btn--deep { background: var(--deep); color: var(--salt); }
.btn--deep:hover { background: var(--plunge); }

/* ---------- Masthead ---------- */
.masthead {
  position: fixed; inset: 0 0 auto 0; z-index: 50;
  color: var(--white);
  transition: background-color .25s ease, box-shadow .25s ease;
}
.masthead.is-scrolled {
  background: rgba(10, 36, 51, 0.94);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  box-shadow: 0 1px 0 rgba(255,255,255,.06);
}
.masthead__inner {
  max-width: var(--max); margin: 0 auto; padding: 14px var(--gutter);
  display: flex; align-items: center; gap: 32px;
}

.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; }
.brand__mark { width: 40px; height: 40px; flex: none; }
.brand__type { display: flex; flex-direction: column; line-height: 1; }
.brand__name {
  font-family: var(--font-display);
  font-stretch: 70%;
  font-weight: 900;
  font-size: 1.45rem;
  text-transform: uppercase;
  letter-spacing: 0.01em;
}
.brand__sub {
  font-family: var(--font-display);
  font-stretch: 100%;
  font-weight: 600;
  font-size: 0.6rem;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  margin-top: 3px;
  color: var(--shallow);
}

.nav { display: flex; gap: 28px; margin-left: auto; }
.nav a {
  text-decoration: none; font-weight: 600; font-size: 0.95rem;
  color: rgba(255,255,255,.82);
  padding: 6px 0;
  border-bottom: 2px solid transparent;
  transition: color .15s, border-color .15s;
}
.nav a:hover { color: var(--white); border-bottom-color: var(--reagent); }

.masthead__actions { display: flex; align-items: center; gap: 18px; }
.phone-link {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font-mono); font-weight: 500; font-size: 0.92rem;
  text-decoration: none; color: var(--white);
}
.phone-link svg { width: 18px; height: 18px; fill: var(--reagent); }
.phone-link:hover span { text-decoration: underline; text-underline-offset: 3px; }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  color: var(--white);
  background:
    radial-gradient(120% 80% at 80% 110%, rgba(116, 211, 220, .32), transparent 60%),
    linear-gradient(172deg, #0A2433 0%, #0B3A50 48%, #0D6A87 100%);
  padding: clamp(120px, 16vh, 168px) 0 clamp(120px, 14vw, 190px);
  min-height: min(100svh, 980px);
  display: flex; align-items: center;
}

.hero__water { position: absolute; inset: 0; z-index: -1; pointer-events: none; }
.caustics {
  position: absolute;
  left: -20%; top: -20%;
  width: 140%; height: 140%;
  mix-blend-mode: screen;
  will-change: transform;
}
.caustics--a { opacity: .32; animation: drift-a 26s ease-in-out infinite alternate; }
.caustics--b { opacity: .22; animation: drift-b 34s ease-in-out infinite alternate; }
@keyframes drift-a {
  from { transform: translate3d(0, 0, 0) scale(1); }
  to   { transform: translate3d(6%, 4%, 0) scale(1.06); }
}
@keyframes drift-b {
  from { transform: translate3d(4%, -2%, 0) scale(1.08); }
  to   { transform: translate3d(-5%, 5%, 0) scale(1); }
}

.hero__inner {
  max-width: var(--max); margin: 0 auto; padding: 0 var(--gutter);
  width: 100%;
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(0, .85fr);
  gap: clamp(32px, 6vw, 88px);
  align-items: center;
}

.hero__title {
  font-family: var(--font-display);
  font-stretch: 66%;
  font-weight: 900;
  font-size: clamp(3.6rem, 10.5vw, 9rem);
  line-height: 0.86;
  letter-spacing: -0.015em;
  word-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 28px;
}
.hero__title span { color: var(--shallow); }
.hero__lede {
  font-size: clamp(1.05rem, 1.5vw, 1.2rem);
  max-width: 34em;
  color: rgba(255,255,255,.86);
  margin-bottom: 34px;
}
.hero__ctas { display: flex; flex-wrap: wrap; gap: 14px; }

.hero__ridge {
  position: absolute; left: 0; right: 0; bottom: -1px;
  width: 100%; height: clamp(48px, 7vw, 110px);
  fill: var(--salt);
}

/* ---------- Test kit (signature) ---------- */
.testkit {
  background: var(--salt);
  color: var(--ink);
  border-radius: 10px;
  padding: 26px 26px 22px;
  box-shadow: 0 30px 60px -20px rgba(3, 15, 22, .55), 0 0 0 1px rgba(255,255,255,.5) inset;
  position: relative;
}
.testkit::before {
  /* the tear-off tab of a test card */
  content: "";
  position: absolute; top: -10px; left: 26px;
  width: 64px; height: 10px;
  background: var(--reagent);
  border-radius: 4px 4px 0 0;
}
.testkit__head {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding-bottom: 16px; margin-bottom: 18px;
  border-bottom: 1px dashed var(--line);
}
.testkit__title {
  font-family: var(--font-display);
  font-stretch: 72%;
  font-weight: 850;
  font-size: 1.5rem;
  text-transform: uppercase;
  letter-spacing: 0.01em;
}

.toggle {
  display: inline-flex;
  background: #E1EAEC;
  border-radius: 999px;
  padding: 3px;
}
.toggle__btn {
  border: 0; background: transparent; cursor: pointer;
  font-family: var(--font-mono); font-size: 0.76rem; font-weight: 500;
  letter-spacing: 0.06em; text-transform: uppercase;
  padding: 6px 12px; border-radius: 999px;
  color: var(--ink-soft);
  transition: background-color .2s, color .2s;
}
.toggle__btn[aria-pressed="true"] { background: var(--deep); color: var(--white); }

.readings { display: grid; gap: 18px; list-style: none; margin: 0; padding: 0; }
.reading__label {
  display: flex; align-items: baseline; gap: 6px;
  font-weight: 600; font-size: 0.95rem;
  margin-bottom: 8px;
}
.reading__label > span { margin-right: auto; }
.reading__value {
  font-family: var(--font-mono); font-weight: 500; font-size: 1.05rem;
  color: var(--plunge);
  transition: color .4s ease;
  font-variant-numeric: tabular-nums;
}
.reading__label small { font-family: var(--font-mono); font-size: .72rem; color: var(--ink-soft); }
.reading.is-off .reading__value { color: var(--phenol); }

.gauge {
  position: relative;
  height: 8px;
  border-radius: 999px;
  background: #DCE6E8;
}
.gauge__ideal {
  position: absolute; top: 0; bottom: 0;
  left: var(--lo, 40%); right: calc(100% - var(--hi, 60%));
  background: rgba(116, 211, 220, .75);
  border-radius: 999px;
}
.gauge__marker {
  position: absolute; top: 50%;
  left: var(--pos, 50%);
  width: 6px; height: 22px;
  margin-left: -3px;
  transform: translateY(-50%);
  border-radius: 3px;
  background: var(--plunge);
  box-shadow: 0 0 0 2px var(--salt);
  transition: left 1.1s cubic-bezier(.22, .9, .24, 1), background-color .4s ease;
}
.reading.is-off .gauge__marker { background: var(--phenol); }
.reading__range {
  margin-top: 6px;
  font-family: var(--font-mono); font-size: .72rem;
  color: var(--ink-soft);
  letter-spacing: .02em;
}
.testkit__note {
  margin-top: 18px; padding-top: 14px;
  border-top: 1px dashed var(--line);
  font-size: .82rem; line-height: 1.5;
  color: var(--ink-soft);
}

/* ---------- Services ---------- */
.services { padding: var(--section-pad) 0; background: var(--salt); }
.services__grid {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  gap: clamp(32px, 6vw, 96px);
  align-items: start;
}
.services__intro { position: sticky; top: 110px; }
.services__intro > p:not(.eyebrow) { color: var(--ink-soft); max-width: 28em; margin-bottom: 28px; }

.service-list { border-bottom: 1px solid var(--line); }
.service {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
  padding: 30px 0;
  border-top: 1px solid var(--line);
}
.service__name {
  font-family: var(--font-display);
  font-stretch: 78%;
  font-weight: 800;
  font-size: clamp(1.6rem, 2.8vw, 2.2rem);
  line-height: 1.05;
}
.service > p { color: var(--ink-soft); max-width: 36em; }
.tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 6px; }
.tags li {
  font-family: var(--font-mono); font-size: .74rem;
  padding: 4px 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--white);
  color: var(--deep);
}

/* ---------- Hard water ---------- */
.hardwater {
  background: var(--shallow-pale);
  padding: clamp(64px, 8vw, 104px) 0;
  position: relative;
}
.hardwater::before {
  /* tile-line: where scale shows up first */
  content: "";
  position: absolute; left: 0; right: 0; top: 0; height: 10px;
  background: repeating-linear-gradient(90deg, var(--plunge) 0 38px, #0B5C76 38px 40px);
}
.hardwater__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: clamp(28px, 6vw, 96px);
  align-items: start;
}
.hardwater__title {
  font-family: var(--font-display);
  font-stretch: 66%;
  font-weight: 900;
  font-size: clamp(2.6rem, 6vw, 5rem);
  line-height: .9;
  word-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--deep);
  text-wrap: balance;
}
.hardwater__body { font-size: 1.1rem; color: #23404D; padding-top: 6px; }

/* ---------- Season ---------- */
.season { padding: var(--section-pad) 0; background: var(--salt); }
.season .section-title { max-width: 18em; }
.season__track {
  margin-top: clamp(40px, 6vw, 72px) !important;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 28px;
  position: relative;
}
.season__track::before {
  content: "";
  position: absolute; left: 0; right: 0; top: 7px;
  height: 2px; background: var(--line);
}
.stage { position: relative; padding-top: 36px; }
.stage::before {
  content: "";
  position: absolute; top: 0; left: 0;
  width: 16px; height: 16px; border-radius: 50%;
  background: var(--stage-color, var(--plunge));
  box-shadow: 0 0 0 5px var(--salt);
}
.stage:nth-child(1) { --stage-color: var(--shallow); }
.stage:nth-child(2) { --stage-color: var(--reagent); }
.stage:nth-child(3) { --stage-color: var(--plunge); }
.stage:nth-child(4) { --stage-color: var(--phenol); }
.stage__when {
  font-family: var(--font-mono); font-size: .78rem;
  letter-spacing: .06em; text-transform: uppercase;
  color: var(--ink-soft);
  margin-bottom: 6px;
}
.stage__name {
  font-family: var(--font-display);
  font-stretch: 66%;
  font-weight: 900;
  font-size: clamp(2.4rem, 4.4vw, 3.6rem);
  line-height: 1;
  text-transform: uppercase;
  margin-bottom: 12px;
}
.stage > p:last-child { color: var(--ink-soft); font-size: 1rem; }

/* ---------- Area + spec ---------- */
.area { padding: var(--section-pad) 0; background: var(--white); }
.area__grid {
  display: grid;
  grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  gap: clamp(40px, 6vw, 96px);
  align-items: start;
}
.cities {
  display: flex; flex-wrap: wrap;
  gap: 4px 0;
  margin: 28px 0 28px !important;
}
.cities li {
  font-family: var(--font-display);
  font-stretch: 74%;
  font-weight: 750;
  font-size: clamp(1.5rem, 2.8vw, 2.25rem);
  line-height: 1.25;
  color: var(--deep);
  display: inline-flex; align-items: center;
}
.cities li:not(:last-child)::after {
  content: "";
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--shallow);
  margin: 0 .55em;
}
.cities__home { color: var(--plunge) !important; }
.cities__home span {
  font-family: var(--font-mono); font-size: .68rem; font-weight: 500;
  letter-spacing: .08em; text-transform: uppercase;
  background: var(--reagent); color: var(--deep);
  padding: 3px 7px; border-radius: 4px;
  margin-left: 10px;
  align-self: center;
}
.area__note { color: var(--ink-soft); max-width: 32em; }

.spec {
  background: var(--deep);
  color: var(--salt);
  border-radius: 10px;
  padding: clamp(24px, 3vw, 36px);
}
.spec__title {
  font-family: var(--font-display);
  font-stretch: 72%;
  font-weight: 850;
  font-size: 1.5rem;
  text-transform: uppercase;
  margin-bottom: 18px;
}
.spec dl { margin: 0 0 22px; }
.spec dl > div {
  display: grid; grid-template-columns: 7.5em minmax(0, 1fr); gap: 12px;
  padding: 11px 0;
  border-top: 1px solid rgba(255,255,255,.12);
}
.spec dl > div:last-child { border-bottom: 1px solid rgba(255,255,255,.12); }
.spec dt {
  font-family: var(--font-mono); font-size: .74rem;
  letter-spacing: .08em; text-transform: uppercase;
  color: var(--shallow);
  padding-top: 3px;
}
.spec dd { margin: 0; font-weight: 600; }
.spec > p { color: rgba(242,246,246,.78); font-size: .98rem; }

/* ---------- FAQ ---------- */
.faq { padding: var(--section-pad) 0; background: var(--salt); }
.faq__grid {
  display: grid;
  grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
  gap: clamp(32px, 6vw, 96px);
}
.faq__list { border-bottom: 1px solid var(--line); }
.faq details { border-top: 1px solid var(--line); }
.faq summary {
  list-style: none;
  cursor: pointer;
  display: flex; justify-content: space-between; align-items: center; gap: 20px;
  padding: 22px 0;
  font-weight: 700;
  font-size: 1.12rem;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "";
  flex: none;
  width: 14px; height: 14px;
  background:
    linear-gradient(var(--plunge), var(--plunge)) center / 100% 2px no-repeat,
    linear-gradient(var(--plunge), var(--plunge)) center / 2px 100% no-repeat;
  transition: transform .2s ease;
}
.faq details[open] summary::after { transform: rotate(45deg); }
.faq summary:hover { color: var(--plunge); }
.faq details p { color: var(--ink-soft); padding: 0 0 24px; max-width: 42em; }

/* ---------- Estimate ---------- */
.estimate {
  background:
    radial-gradient(90% 70% at 0% 100%, rgba(13, 106, 135, .45), transparent 60%),
    var(--deep);
  color: var(--salt);
  padding: var(--section-pad) 0;
}
.estimate__grid {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  gap: clamp(36px, 6vw, 96px);
  align-items: start;
}
.estimate__intro > p:not(.eyebrow) { color: rgba(242,246,246,.8); max-width: 30em; }
.contact-lines { margin-top: 32px !important; display: grid; gap: 18px; }
.contact-lines li { display: grid; gap: 2px; }
.contact-lines span {
  font-family: var(--font-mono); font-size: .74rem; letter-spacing: .08em;
  text-transform: uppercase; color: var(--shallow);
}
.contact-lines a {
  font-family: var(--font-display); font-stretch: 80%; font-weight: 750;
  font-size: clamp(1.25rem, 2.4vw, 1.8rem);
  text-decoration: none; color: var(--white);
  overflow-wrap: anywhere;
}
.contact-lines a:hover { color: var(--reagent); }
.contact-lines a[href^="mailto"] { font-size: clamp(1.05rem, 1.7vw, 1.3rem); }

.form {
  background: var(--deep-2);
  border: 1px solid rgba(255,255,255,.08);
  border-radius: 10px;
  padding: clamp(20px, 3vw, 36px);
  display: grid; gap: 18px;
}
.field-row { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; }
.field { display: grid; gap: 7px; }
.field label { font-weight: 600; font-size: .92rem; }
.optional { font-weight: 400; color: rgba(242,246,246,.55); font-size: .82rem; margin-left: 4px; }
.field input, .field select, .field textarea {
  width: 100%;
  background: rgba(255,255,255,.05);
  border: 1px solid rgba(255,255,255,.18);
  border-radius: var(--radius);
  padding: 13px 14px;
  color: var(--white);
  transition: border-color .15s, background-color .15s;
}
.field select {
  appearance: none;
  background-image: linear-gradient(45deg, transparent 50%, var(--shallow) 50%), linear-gradient(135deg, var(--shallow) 50%, transparent 50%);
  background-position: calc(100% - 20px) 55%, calc(100% - 14px) 55%;
  background-size: 6px 6px, 6px 6px;
  background-repeat: no-repeat;
  padding-right: 38px;
}
.field select option { color: var(--deep); background: var(--white); }
.field textarea { resize: vertical; min-height: 110px; }
.field input::placeholder, .field textarea::placeholder { color: rgba(242,246,246,.4); }
.field input:hover, .field select:hover, .field textarea:hover { border-color: rgba(255,255,255,.32); }
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none; border-color: var(--reagent); background-color: rgba(255,255,255,.08);
}
.field.is-invalid input, .field.is-invalid select { border-color: var(--phenol); }
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; opacity: 0; }
.form__status { min-height: 1.5em; font-size: .95rem; margin: 0; }
.form__status.is-error { color: #FF9C8A; }
.form__status.is-ok { color: var(--shallow); }

/* ---------- Footer ---------- */
.footer { background: var(--deep-3); color: rgba(242,246,246,.75); padding: 56px 0 28px; font-size: .95rem; }
.footer__inner {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr) minmax(0, 1fr);
  gap: 32px;
  padding-bottom: 36px;
  border-bottom: 1px solid rgba(255,255,255,.08);
}
.footer__brand .brand__name { color: var(--white); display: block; }
.footer__brand .brand__sub { display: block; margin-bottom: 14px; }
.footer__nav, .footer__contact { display: grid; gap: 8px; align-content: start; }
.footer a { text-decoration: none; color: rgba(242,246,246,.85); }
.footer a:hover { color: var(--reagent); }
.footer__contact a { overflow-wrap: anywhere; }
.footer__legal { padding-top: 22px; font-size: .82rem; color: rgba(242,246,246,.5); }

/* ---------- 404 ---------- */
.lost {
  min-height: 100svh;
  display: grid; place-items: center; text-align: center;
  padding: 120px var(--gutter) 80px;
}
.lost .hero__title { font-size: clamp(3.4rem, 12vw, 8rem); }
.lost p { color: rgba(255,255,255,.85); max-width: 30em; margin: 0 auto 32px; }

/* ---------- Responsive ---------- */
@media (max-width: 1020px) {
  .nav { display: none; }
  .masthead__actions { margin-left: auto; }
  .hero__inner { grid-template-columns: minmax(0, 1fr); }
  .testkit { max-width: 520px; }
}

@media (max-width: 860px) {
  .services__grid, .area__grid, .faq__grid, .estimate__grid, .hardwater__inner { grid-template-columns: minmax(0, 1fr); }
  .services__intro { position: static; }
  .season__track { grid-template-columns: repeat(2, minmax(0, 1fr)); row-gap: 44px; }
  .season__track::before { display: none; }
  .footer__inner { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
  .footer__brand { grid-column: 1 / -1; }
}

@media (max-width: 560px) {
  .phone-link span { display: none; }
  .phone-link { width: 40px; height: 40px; justify-content: center; border: 1px solid rgba(255,255,255,.25); border-radius: var(--radius); }
  .brand__mark { width: 34px; height: 34px; }
  .brand__name { font-size: 1.25rem; }
  .brand__sub { letter-spacing: .1em; white-space: nowrap; }
  .hide-sm { display: none; }
  .masthead__inner { gap: 12px; }
  .masthead__actions { gap: 8px; }
  .hero__ctas .btn { flex: 1 1 100%; }
  .testkit { padding: 22px 18px 18px; }
  .testkit__head { flex-wrap: wrap; }
  .field-row { grid-template-columns: minmax(0, 1fr); }
  .season__track { grid-template-columns: minmax(0, 1fr); }
  .footer__inner { grid-template-columns: minmax(0, 1fr); }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .caustics { animation: none; }
  .gauge__marker, .reading__value { transition: none; }
}