/* ==========================================================================
   ENVIRONAIR — Clean-Room Editorial
   A design system for indoor air quality engineering.
   ========================================================================== */

:root {
  /* paper & ink — tinted, never pure */
  --paper:      #f3f5f1;
  --paper-2:    #e9ede7;
  --paper-3:    #dde3da;
  --ink:        #16211b;
  --ink-2:      #3d4c43;
  --ink-3:      #6c7b70;

  /* brand */
  --brand:      #0e4a3b;
  --brand-2:    #17695a;
  --brand-ink:  #dfe9e1;
  --accent:     #b25e2b;
  --accent-2:   #d8a06a;

  --rule:       color-mix(in oklch, var(--ink) 15%, transparent);
  --rule-soft:  color-mix(in oklch, var(--ink) 9%, transparent);
  --rule-light: color-mix(in oklch, var(--brand-ink) 22%, transparent);

  --font-display: "Fraunces", "Noto Serif TC", Georgia, serif;
  --font-body: "Instrument Sans", "Noto Sans TC", "PingFang HK", sans-serif;

  --shell: 1280px;
  --pad: clamp(1.25rem, 4.2vw, 4.25rem);
  --gap: clamp(1.5rem, 3.4vw, 3.25rem);

  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
}

html[lang="zh-Hant"], html[lang="zh-Hans"] {
  --font-display: "Noto Serif TC", "Fraunces", Georgia, serif;
  --font-body: "Noto Sans TC", "Instrument Sans", "PingFang HK", sans-serif;
}

/* ---------- reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: clamp(1rem, 0.96rem + 0.18vw, 1.09rem);
  line-height: 1.72;
  font-weight: 400;
  letter-spacing: 0.002em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; }
h1, h2, h3, h4 { margin: 0; font-weight: 500; }
p { margin: 0 0 1.15em; }
ul, ol { margin: 0 0 1.25em; padding-left: 1.15em; }
li { margin-bottom: 0.5em; }
button, input, textarea { font: inherit; color: inherit; }

::selection { background: var(--brand); color: var(--paper); }

.shell {
  width: min(100% - 2 * var(--pad), var(--shell));
  margin-inline: auto;
}

/* ---------- type ---------- */
.display {
  font-family: var(--font-display);
  font-weight: 400;
  font-variation-settings: "SOFT" 0, "WONK" 1, "opsz" 120;
  line-height: 1.02;
  letter-spacing: -0.018em;
  text-wrap: balance;
}
html[lang^="zh"] .display {
  font-variation-settings: normal;
  line-height: 1.18;
  letter-spacing: 0.01em;
  font-weight: 600;
}

h1.display { font-size: clamp(2.75rem, 6.4vw, 5.4rem); }
h2.display { font-size: clamp(2.1rem, 4.2vw, 3.55rem); }
h3.display { font-size: clamp(1.55rem, 2.4vw, 2.15rem); }

.eyebrow {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-2);
  margin-bottom: 1.4rem;
}
.eyebrow::before {
  content: "";
  width: 2.4rem;
  height: 1px;
  background: var(--accent);
  flex: none;
}
html[lang^="zh"] .eyebrow { letter-spacing: 0.32em; }

.lede {
  font-size: clamp(1.12rem, 1rem + 0.55vw, 1.42rem);
  line-height: 1.62;
  color: var(--ink-2);
  max-width: 46ch;
}
html[lang^="zh"] .lede { line-height: 1.9; max-width: 38ch; }

.prose { max-width: 62ch; color: var(--ink-2); }
.prose strong { color: var(--ink); font-weight: 600; }
.prose h3 {
  font-family: var(--font-display);
  font-size: 1.32rem;
  color: var(--ink);
  margin: 2.2rem 0 0.85rem;
  letter-spacing: -0.01em;
}
html[lang^="zh"] .prose h3 { letter-spacing: 0.01em; }

.num {
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum" 1;
}

.smallcaps {
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  font-weight: 600;
  color: var(--ink-3);
}

/* ---------- header ---------- */
.masthead {
  position: sticky;
  top: 0;
  z-index: 60;
  background: color-mix(in oklch, var(--paper) 92%, transparent);
  border-bottom: 1px solid var(--rule);
}
.masthead-inner {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  min-height: 4.6rem;
}
.wordmark {
  display: flex;
  flex-direction: column;
  line-height: 1;
  text-decoration: none;
  margin-right: auto;
}
.wordmark b {
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 1.12rem;
  letter-spacing: 0.34em;
  color: var(--ink);
}
.wordmark span {
  font-size: 0.62rem;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin-top: 0.42rem;
}

.nav { display: flex; align-items: center; gap: clamp(1rem, 2.1vw, 2.1rem); }
.nav a {
  position: relative;
  text-decoration: none;
  font-size: 0.83rem;
  font-weight: 500;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--ink-2);
  padding: 0.35rem 0;
}
html[lang^="zh"] .nav a { letter-spacing: 0.14em; }
.nav a::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 100%; height: 1px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.45s var(--ease-out);
}
.nav a:hover::after, .nav a[aria-current="page"]::after {
  transform: scaleX(1);
  transform-origin: left;
}
.nav a[aria-current="page"] { color: var(--ink); }

.langswitch {
  display: flex;
  gap: 0.55rem;
  align-items: center;
  padding-left: 1.25rem;
  border-left: 1px solid var(--rule);
}
.langswitch a {
  text-decoration: none;
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  color: var(--ink-3);
  padding: 0.18rem 0.1rem;
}
.langswitch a[aria-current="true"] {
  color: var(--ink);
  border-bottom: 1px solid var(--accent);
}
.langswitch a:hover { color: var(--ink); }

.tel-pill {
  display: inline-flex;
  align-items: baseline;
  gap: 0.55rem;
  text-decoration: none;
  background: var(--brand);
  color: var(--brand-ink);
  padding: 0.62rem 1.15rem;
  border-radius: 2px;
  font-size: 0.82rem;
  letter-spacing: 0.06em;
  transition: background 0.35s var(--ease-out), color 0.35s var(--ease-out);
}
.tel-pill:hover { background: var(--ink); color: var(--paper); }
.tel-pill .num { font-weight: 600; }

.menu-toggle {
  display: none;
  background: none;
  border: 1px solid var(--rule);
  border-radius: 2px;
  padding: 0.55rem 0.85rem;
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  cursor: pointer;
}

/* ---------- hero ---------- */
.hero {
  position: relative;
  padding: clamp(3.25rem, 8vw, 7.5rem) 0 clamp(2.5rem, 5vw, 4.5rem);
  overflow: hidden;
}
.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
  gap: clamp(2rem, 5vw, 5.5rem);
  align-items: end;
}
.hero h1 { margin-bottom: 1.7rem; }
.hero h1 em {
  font-style: italic;
  color: var(--brand);
  font-variation-settings: "SOFT" 0, "WONK" 1, "opsz" 120;
}
html[lang^="zh"] .hero h1 em { font-style: normal; color: var(--brand); }
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.95rem;
  margin-top: 2.15rem;
}

.hero-figure {
  position: relative;
  align-self: stretch;
  display: flex;
  align-items: flex-end;
  gap: 1.15rem;
}
.hero-figure .plate {
  position: relative;
  flex: 1;
  background: linear-gradient(168deg, var(--paper-2), var(--paper-3));
  border: 1px solid var(--rule-soft);
  padding: clamp(1.5rem, 3vw, 2.75rem);
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: clamp(20rem, 34vw, 30rem);
}
.hero-figure img {
  filter: contrast(1.02) saturate(0.92);
  max-height: clamp(17rem, 28vw, 25rem);
  width: auto;
  object-fit: contain;
}
.is-cutout { mix-blend-mode: multiply; }
.hero-figure .vcaption {
  writing-mode: vertical-rl;
  text-orientation: mixed;
  font-size: 0.68rem;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--ink-3);
  padding-bottom: 0.25rem;
}
.hero-figure .corner-rule {
  position: absolute;
  top: -1px; right: -1px;
  width: 3.4rem; height: 3.4rem;
  border-top: 2px solid var(--accent);
  border-right: 2px solid var(--accent);
}

/* ---------- spec strip ---------- */
.specstrip {
  border-block: 1px solid var(--rule);
  margin-top: clamp(2.5rem, 5vw, 4.25rem);
}
.specstrip-inner {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}
.specstrip-item {
  padding: clamp(1.35rem, 2.6vw, 2.15rem) clamp(0.75rem, 2vw, 1.85rem);
  border-left: 1px solid var(--rule-soft);
}
.specstrip-item:first-child { border-left: 0; padding-left: 0; }
.specstrip-item .val {
  font-family: var(--font-display);
  font-size: clamp(1.65rem, 3vw, 2.55rem);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--brand);
}
html[lang^="zh"] .specstrip-item .val { letter-spacing: 0.01em; }
.specstrip-item .key {
  display: block;
  margin-top: 0.75rem;
  font-size: 0.73rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--ink-3);
}
html[lang^="zh"] .specstrip-item .key { letter-spacing: 0.22em; }

/* ---------- sections ---------- */
.section { padding: clamp(3.5rem, 7.5vw, 7rem) 0; }
.section--tint { background: var(--paper-2); }
.section--brand {
  background: var(--brand);
  color: var(--brand-ink);
}
.section--brand .eyebrow { color: color-mix(in oklch, var(--brand-ink) 78%, transparent); }
.section--brand .eyebrow::before { background: var(--accent-2); }
.section--brand .lede, .section--brand .prose { color: color-mix(in oklch, var(--brand-ink) 84%, transparent); }
.section--brand .prose strong { color: var(--brand-ink); }

.section-head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: clamp(1.25rem, 3vw, 3.25rem);
  align-items: start;
  margin-bottom: clamp(2.15rem, 4.2vw, 3.75rem);
}
.section-index {
  font-family: var(--font-display);
  font-size: clamp(1.55rem, 2.2vw, 2.15rem);
  color: var(--accent);
  line-height: 1;
  padding-top: 0.42rem;
  font-variant-numeric: tabular-nums;
}
.section-head h2 { max-width: 22ch; }
.section-head .lede { margin-top: 1.15rem; }

.split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: clamp(1.75rem, 4.6vw, 5rem);
  align-items: start;
}
.split--wide-left { grid-template-columns: minmax(0, 1.22fr) minmax(0, 0.78fr); }
.split--wide-right { grid-template-columns: minmax(0, 0.78fr) minmax(0, 1.22fr); }

/* ---------- figures ---------- */
.figure { margin: 0 0 2.25rem; }
.figure .frame {
  border: 1px solid var(--rule-soft);
  background: var(--paper-2);
  overflow: hidden;
}
.section--tint .figure .frame { background: var(--paper); }
.figure img { width: 100%; object-fit: cover; }
.figure figcaption {
  display: flex;
  gap: 0.85rem;
  margin-top: 0.85rem;
  font-size: 0.76rem;
  letter-spacing: 0.08em;
  color: var(--ink-3);
  line-height: 1.55;
}
.figure figcaption::before {
  content: "";
  width: 1.65rem;
  height: 1px;
  background: var(--accent);
  flex: none;
  margin-top: 0.62em;
}
.figure--float img { mix-blend-mode: multiply; }

.contaminants {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(1rem, 2.4vw, 2.15rem);
}
.contaminants .figure { margin-bottom: 0; }
.contaminants .figure img {
  aspect-ratio: 1 / 1;
  object-fit: cover;
  filter: grayscale(0.35) contrast(1.05);
}

/* ---------- product rows (editorial list) ---------- */
.product-row {
  display: grid;
  grid-template-columns: 4.25rem minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: clamp(1.15rem, 3vw, 3.15rem);
  padding: clamp(1.85rem, 3.6vw, 3.15rem) 0;
  border-top: 1px solid var(--rule);
  align-items: start;
}
.product-row:last-child { border-bottom: 1px solid var(--rule); }
.product-row .idx {
  font-family: var(--font-display);
  font-size: 1.35rem;
  color: var(--ink-3);
  font-variant-numeric: tabular-nums;
  padding-top: 0.35rem;
}
.product-row h3 { margin-bottom: 0.85rem; }
.product-row h3 a { text-decoration: none; }
.product-row h3 a:hover { color: var(--brand); }
.product-row .models {
  margin: 1.25rem 0 1.35rem;
  padding: 0;
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem 1.35rem;
}
.product-row .models li {
  margin: 0;
  font-size: 0.82rem;
  letter-spacing: 0.06em;
  color: var(--ink-3);
}
.product-row .models li::before {
  content: "—";
  margin-right: 0.55rem;
  color: var(--accent);
}
.product-row .shot {
  background: var(--paper-2);
  border: 1px solid var(--rule-soft);
  padding: clamp(1rem, 2.2vw, 1.85rem);
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 13rem;
}
.product-row .shot img {
  max-height: 15.5rem;
  width: auto;
  object-fit: contain;
  transition: transform 0.8s var(--ease-out);
}
.product-row:hover .shot img { transform: scale(1.035); }

.textlink {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  text-decoration: none;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--brand);
}
html[lang^="zh"] .textlink { letter-spacing: 0.22em; }
.textlink .arrow { transition: transform 0.45s var(--ease-out); }
.textlink:hover .arrow { transform: translateX(0.35rem); }

/* ---------- spec tables ---------- */
.tablewrap { overflow-x: auto; margin: 1.5rem 0 2.5rem; }
table.spec {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
  min-width: 34rem;
}
table.spec caption {
  text-align: left;
  font-family: var(--font-display);
  font-size: 1.28rem;
  letter-spacing: -0.01em;
  padding-bottom: 0.85rem;
  color: var(--ink);
}
html[lang^="zh"] table.spec caption { letter-spacing: 0.01em; }
table.spec th, table.spec td {
  text-align: left;
  padding: 0.72rem 1.15rem 0.72rem 0;
  border-bottom: 1px solid var(--rule-soft);
  vertical-align: top;
}
table.spec thead th {
  font-size: 0.71rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-3);
  font-weight: 600;
  border-bottom: 1px solid var(--rule);
  white-space: nowrap;
}
table.spec tbody th {
  font-weight: 500;
  color: var(--ink-2);
  width: 32%;
}
table.spec td { font-variant-numeric: tabular-nums; color: var(--ink); }
table.spec tbody tr:hover { background: color-mix(in oklch, var(--paper-2) 70%, transparent); }
.section--brand table.spec th,
.section--brand table.spec td { border-color: var(--rule-light); }
.section--brand table.spec caption,
.section--brand table.spec td { color: var(--brand-ink); }
.section--brand table.spec tbody th,
.section--brand table.spec thead th { color: color-mix(in oklch, var(--brand-ink) 72%, transparent); }

/* ---------- pillars (services / credentials) ---------- */
.pillars { border-top: 1px solid var(--rule); }
.pillar {
  display: grid;
  grid-template-columns: 5.5rem minmax(0, 1fr) minmax(0, 1.15fr);
  gap: clamp(1.15rem, 3vw, 3rem);
  padding: clamp(1.75rem, 3.2vw, 2.85rem) 0;
  border-bottom: 1px solid var(--rule);
}
.section--brand .pillars, .section--brand .pillar { border-color: var(--rule-light); }
.pillar .idx {
  font-family: var(--font-display);
  font-size: clamp(1.95rem, 3vw, 2.65rem);
  color: var(--accent);
  line-height: 0.95;
  font-variant-numeric: tabular-nums;
}
.pillar h3 { font-family: var(--font-display); font-size: 1.42rem; letter-spacing: -0.01em; }
html[lang^="zh"] .pillar h3 { letter-spacing: 0.01em; }
.pillar p { margin: 0; color: var(--ink-2); }
.section--brand .pillar p { color: color-mix(in oklch, var(--brand-ink) 82%, transparent); }

.creds {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--rule);
}
.creds li {
  display: grid;
  grid-template-columns: minmax(0, 0.42fr) minmax(0, 1fr);
  gap: 1.25rem;
  padding: 1.15rem 0;
  border-bottom: 1px solid var(--rule-soft);
  margin: 0;
}
.creds .k {
  font-size: 0.73rem;
  letter-spacing: 0.17em;
  text-transform: uppercase;
  color: var(--ink-3);
  padding-top: 0.28em;
}
.creds .v { color: var(--ink); }

/* ---------- statement band ---------- */
.statement {
  padding: clamp(3.25rem, 7vw, 6.25rem) 0;
}
.statement blockquote {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.85rem, 3.9vw, 3.15rem);
  line-height: 1.16;
  letter-spacing: -0.017em;
  max-width: 24ch;
}
html[lang^="zh"] .statement blockquote { letter-spacing: 0.012em; line-height: 1.42; max-width: 17ch; }
.statement .attr {
  margin-top: 1.85rem;
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: color-mix(in oklch, var(--brand-ink) 70%, transparent);
}

/* ---------- CTA band ---------- */
.cta {
  padding: clamp(3.25rem, 6.5vw, 5.75rem) 0;
  border-top: 1px solid var(--rule);
}
.cta-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  gap: clamp(1.75rem, 4vw, 4.5rem);
  align-items: center;
}
.cta h2 { max-width: 16ch; }
.cta-side {
  display: flex;
  flex-direction: column;
  gap: 1.15rem;
  align-items: flex-start;
}
.phone-line {
  font-family: var(--font-display);
  font-size: clamp(1.95rem, 3.6vw, 2.95rem);
  letter-spacing: -0.015em;
  text-decoration: none;
  color: var(--brand);
  font-variant-numeric: tabular-nums;
  border-bottom: 2px solid var(--accent);
  padding-bottom: 0.18em;
  transition: color 0.35s var(--ease-out);
}
.phone-line:hover { color: var(--accent); }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.98rem 1.85rem;
  background: var(--brand);
  color: var(--paper);
  text-decoration: none;
  border: 1px solid var(--brand);
  border-radius: 2px;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  cursor: pointer;
  transition: background 0.4s var(--ease-out), color 0.4s var(--ease-out), border-color 0.4s var(--ease-out);
}
html[lang^="zh"] .btn { letter-spacing: 0.24em; }
.btn:hover { background: var(--ink); border-color: var(--ink); color: var(--paper); }
.btn--ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--rule);
}
.btn--ghost:hover { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.section--brand .btn {
  background: var(--accent-2);
  border-color: var(--accent-2);
  color: var(--brand);
}
.section--brand .btn:hover { background: var(--paper); border-color: var(--paper); color: var(--brand); }
.section--brand .btn--ghost {
  background: transparent;
  color: var(--brand-ink);
  border-color: var(--rule-light);
}
.section--brand .btn--ghost:hover { background: var(--brand-ink); color: var(--brand); }

/* ---------- page header (interior pages) ---------- */
.pagehead {
  padding: clamp(2.85rem, 6vw, 5.25rem) 0 clamp(1.85rem, 3.6vw, 3.15rem);
  border-bottom: 1px solid var(--rule);
}
.pagehead h1 { max-width: 20ch; }
.pagehead .lede { margin-top: 1.55rem; }
.pagehead-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem 2.65rem;
  margin-top: 2.15rem;
}
.pagehead-meta span {
  font-size: 0.74rem;
  letter-spacing: 0.17em;
  text-transform: uppercase;
  color: var(--ink-3);
}
.pagehead-meta .num { color: var(--accent); }

/* ---------- gallery ---------- */
.gallery {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: clamp(0.85rem, 1.8vw, 1.65rem);
}
.gallery .cell {
  background: var(--paper-2);
  border: 1px solid var(--rule-soft);
  padding: clamp(0.85rem, 1.8vw, 1.55rem);
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 11rem;
}
.gallery .cell img { width: 100%; object-fit: contain; max-height: 17rem; }
.gallery .c4 { grid-column: span 4; }
.gallery .c6 { grid-column: span 6; }
.gallery .c8 { grid-column: span 8; }
.gallery .c12 { grid-column: span 12; }

/* ---------- definition list ---------- */
.deflist { margin: 1.75rem 0 2.25rem; border-top: 1px solid var(--rule); }
.deflist > div {
  display: grid;
  grid-template-columns: minmax(0, 0.55fr) minmax(0, 1fr);
  gap: 1.25rem;
  padding: 1.05rem 0;
  border-bottom: 1px solid var(--rule-soft);
}
.deflist dt {
  font-size: 0.73rem;
  letter-spacing: 0.17em;
  text-transform: uppercase;
  color: var(--ink-3);
  padding-top: 0.3em;
}
.deflist dd { margin: 0; color: var(--ink); }

/* ---------- contact form ---------- */
.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.35rem 1.85rem;
}
.field { display: flex; flex-direction: column; gap: 0.55rem; }
.field--full { grid-column: 1 / -1; }
.field label {
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-3);
}
.field input, .field textarea {
  background: transparent;
  border: 0;
  border-bottom: 1px solid var(--rule);
  padding: 0.72rem 0.15rem;
  outline: none;
  transition: border-color 0.35s var(--ease-out);
  border-radius: 0;
}
.field input:focus, .field textarea:focus { border-color: var(--accent); }
.field textarea { resize: vertical; min-height: 7.5rem; }
.form-note {
  font-size: 0.78rem;
  color: var(--ink-3);
  margin-top: 1.15rem;
}

/* ---------- footer ---------- */
.footer {
  background: var(--brand);
  color: var(--brand-ink);
  padding: clamp(3.25rem, 6vw, 5.25rem) 0 2.15rem;
}
.footer-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) repeat(3, minmax(0, 1fr));
  gap: clamp(1.85rem, 3.6vw, 3.65rem);
  padding-bottom: clamp(2.25rem, 4vw, 3.65rem);
  border-bottom: 1px solid var(--rule-light);
}
.footer .wordmark b { color: var(--brand-ink); }
.footer .wordmark span { color: color-mix(in oklch, var(--brand-ink) 62%, transparent); }
.footer h4 {
  font-size: 0.72rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: color-mix(in oklch, var(--brand-ink) 62%, transparent);
  margin-bottom: 1.15rem;
  font-weight: 600;
}
.footer p, .footer li {
  color: color-mix(in oklch, var(--brand-ink) 84%, transparent);
  font-size: 0.92rem;
}
.footer ul { list-style: none; padding: 0; margin: 0; }
.footer li { margin-bottom: 0.62rem; }
.footer a { text-decoration: none; }
.footer a:hover { color: var(--accent-2); }
.footer-brandline {
  margin-top: 1.85rem;
  font-family: var(--font-display);
  font-size: 1.42rem;
  line-height: 1.35;
  letter-spacing: -0.01em;
  color: var(--brand-ink);
  max-width: 22ch;
}
.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem 2.15rem;
  padding-top: 1.65rem;
  font-size: 0.76rem;
  letter-spacing: 0.11em;
  color: color-mix(in oklch, var(--brand-ink) 58%, transparent);
}

/* ---------- misc ---------- */
.crumb {
  padding-top: 1.35rem;
  font-size: 0.73rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-3);
}
.crumb a { text-decoration: none; }
.crumb a:hover { color: var(--accent); }
.crumb span { color: var(--accent); padding: 0 0.5rem; }

.pdf-list { list-style: none; padding: 0; margin: 1.5rem 0 0; border-top: 1px solid var(--rule); }
.pdf-list li {
  margin: 0;
  border-bottom: 1px solid var(--rule-soft);
}
.pdf-list a {
  display: flex;
  align-items: baseline;
  gap: 1.15rem;
  padding: 1.05rem 0.15rem;
  text-decoration: none;
  transition: background 0.35s var(--ease-out), padding 0.35s var(--ease-out);
}
.pdf-list a:hover { background: color-mix(in oklch, var(--paper-2) 80%, transparent); padding-inline: 0.85rem; }
.pdf-list .tag {
  font-size: 0.68rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  flex: none;
  padding-top: 0.32em;
}
.pdf-list .name { flex: 1; }
.pdf-list .size { font-size: 0.78rem; color: var(--ink-3); font-variant-numeric: tabular-nums; }

.note-strip {
  border-left: 2px solid var(--accent);
  padding: 0.35rem 0 0.35rem 1.35rem;
  color: var(--ink-2);
  max-width: 58ch;
}

/* ---------- motion (gated on JS availability) ---------- */
.js .reveal {
  opacity: 0;
  transform: translateY(1.35rem);
}
.js .reveal.is-in {
  opacity: 1;
  transform: none;
  transition: opacity 0.9s var(--ease-out), transform 0.9s var(--ease-out);
  transition-delay: var(--d, 0ms);
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .js .reveal { opacity: 1; transform: none; transition: none; }
  .product-row .shot img, .textlink .arrow { transition: none; }
}

/* ---------- responsive ---------- */
@media (max-width: 1080px) {
  .hero-grid { grid-template-columns: 1fr; align-items: start; }
  .hero-figure { max-width: 40rem; }
  .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 900px) {
  .nav, .langswitch { display: none; }
  .menu-toggle { display: inline-flex; }
  .masthead.is-open .nav {
    display: flex;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    background: var(--paper);
    border-bottom: 1px solid var(--rule);
    padding: 0.85rem var(--pad) 1.35rem;
  }
  .masthead.is-open .nav a { padding: 0.75rem 0; width: 100%; border-bottom: 1px solid var(--rule-soft); }
  .masthead.is-open .langswitch {
    display: flex;
    position: absolute;
    top: calc(100% + 15.5rem);
    left: 0;
    border-left: 0;
    padding: 0 var(--pad) 1.25rem;
    background: var(--paper);
    width: 100%;
  }
  .split, .split--wide-left, .split--wide-right, .cta-inner { grid-template-columns: 1fr; }
  .product-row { grid-template-columns: 3.15rem minmax(0, 1fr); }
  .product-row .shot { grid-column: 2; }
  .pillar { grid-template-columns: 3.65rem minmax(0, 1fr); }
  .pillar p { grid-column: 2; }
  .contaminants { grid-template-columns: repeat(3, 1fr); gap: 0.85rem; }
  .gallery .c4, .gallery .c6, .gallery .c8 { grid-column: span 6; }
  .specstrip-inner { grid-template-columns: repeat(2, 1fr); }
  .specstrip-item:nth-child(3) { border-left: 0; padding-left: 0; }
  .specstrip-item { border-top: 1px solid var(--rule-soft); }
  .specstrip-item:nth-child(-n+2) { border-top: 0; }
}
@media (max-width: 620px) {
  .contaminants { grid-template-columns: 1fr; }
  .form-grid { grid-template-columns: 1fr; }
  .creds li, .deflist > div { grid-template-columns: 1fr; gap: 0.35rem; }
  .gallery .c4, .gallery .c6, .gallery .c8 { grid-column: span 12; }
  .footer-grid { grid-template-columns: 1fr; }
  .hero-figure .vcaption { display: none; }
}