/* ==========================================================================
   SFB Fasteners — Global Stylesheet
   Clean, professional Western-industrial B2B aesthetic
   ========================================================================== */

:root {
  --navy: #10263f;
  --navy-2: #1b3a5c;
  --steel: #3d5a78;
  --accent: #e87722;        /* safety orange for CTAs */
  --accent-dark: #cf6517;
  --link: #1a5fb4;
  --bg: #ffffff;
  --bg-alt: #f4f6f9;
  --bg-dark: #0d1e33;
  --border: #dde3ea;
  --text: #24313f;
  --text-muted: #5b6b7b;
  --radius: 6px;
  --shadow: 0 1px 3px rgba(16, 38, 63, .08), 0 4px 14px rgba(16, 38, 63, .06);
  --shadow-lg: 0 8px 30px rgba(16, 38, 63, .12);
  --container: 1180px;
  --header-h: 72px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: "Inter", "Segoe UI", "Helvetica Neue", Arial, "PingFang SC", sans-serif;
  font-size: 16px;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

img, svg { display: block; max-width: 100%; }

a { color: var(--link); text-decoration: none; }
a:hover { text-decoration: underline; }

h1, h2, h3, h4 { color: var(--navy); line-height: 1.25; font-weight: 700; }
h1 { font-size: 2.4rem; letter-spacing: -.5px; }
h2 { font-size: 1.9rem; letter-spacing: -.4px; }
h3 { font-size: 1.25rem; }

.container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }

/* ---------- Top bar ---------- */
.topbar {
  background: var(--bg-dark);
  color: #9fb3c8;
  font-size: .82rem;
}
.topbar .container {
  display: flex; justify-content: space-between; align-items: center;
  min-height: 38px; gap: 16px; flex-wrap: wrap;
}
.topbar a { color: #cddceb; }
.topbar .tb-links { display: flex; gap: 18px; align-items: center; }
.topbar .tb-item { display: inline-flex; align-items: center; gap: 6px; white-space: nowrap; }

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: #fff;
  border-bottom: 1px solid var(--border);
  box-shadow: 0 1px 0 rgba(16,38,63,.02);
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: var(--header-h); gap: 24px;
}
.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; }
.brand:hover { text-decoration: none; }
.brand-mark {
  width: 42px; height: 42px; flex: none;
}
.brand-text { line-height: 1.15; }
.brand-name {
  font-weight: 800; font-size: 1.28rem; color: var(--navy); letter-spacing: .2px;
}
.brand-name span { color: var(--accent); }
.brand-tag { font-size: .72rem; color: var(--text-muted); letter-spacing: .12em; text-transform: uppercase; }

.main-nav { display: flex; align-items: center; gap: 6px; }
.main-nav a {
  display: block; padding: 10px 16px;
  color: var(--text); font-weight: 600; font-size: .95rem;
  border-radius: 4px;
}
.main-nav a:hover { color: var(--navy); background: var(--bg-alt); text-decoration: none; }
.main-nav a.active { color: var(--navy); box-shadow: inset 0 -3px 0 var(--accent); border-radius: 4px 4px 0 0; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 11px 22px;
  background: var(--accent); color: #fff;
  font-weight: 700; font-size: .95rem;
  border: none; border-radius: var(--radius);
  cursor: pointer; transition: background .15s, transform .15s;
  text-decoration: none;
}
.btn:hover { background: var(--accent-dark); text-decoration: none; transform: translateY(-1px); }
.btn-outline {
  background: transparent; color: var(--navy);
  border: 2px solid var(--navy);
}
.btn-outline:hover { background: var(--navy); color: #fff; }
.btn-ghost {
  background: rgba(255,255,255,.12); color: #fff; border: 2px solid rgba(255,255,255,.65);
}
.btn-ghost:hover { background: rgba(255,255,255,.22); color: #fff; }
.header-cta { flex: none; }

.nav-toggle {
  display: none; background: none; border: 1px solid var(--border);
  border-radius: 6px; padding: 8px 10px; cursor: pointer;
}
.nav-toggle span { display: block; width: 20px; height: 2px; background: var(--navy); margin: 4px 0; transition: .2s; }

/* ---------- Hero (home) ---------- */
.hero {
  background:
    linear-gradient(100deg, rgba(13,30,51,.94) 0%, rgba(16,38,63,.85) 45%, rgba(27,58,92,.55) 100%),
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='260' height='260' viewBox='0 0 260 260'%3E%3Cg fill='none' stroke='%23ffffff' stroke-opacity='.07' stroke-width='2'%3E%3Cpolygon points='130,60 190,95 190,165 130,200 70,165 70,95'/%3E%3Ccircle cx='130' cy='130' r='38'/%3E%3Cpolygon points='20,200 50,217 50,251 20,268 -10,251 -10,217'/%3E%3Ccircle cx='240' cy='40' r='24'/%3E%3C/g%3E%3C/svg%3E");
  background-size: auto, 260px 260px;
  color: #fff;
  padding: 96px 0 110px;
}
.hero .eyebrow {
  display: inline-block; font-size: .8rem; font-weight: 700;
  letter-spacing: .18em; text-transform: uppercase;
  color: #ffb27a; margin-bottom: 18px;
}
.hero h1 { color: #fff; font-size: 3rem; max-width: 720px; margin-bottom: 20px; }
.hero h1 em { font-style: normal; color: #ffab63; }
.hero p.lead { font-size: 1.15rem; color: #c9d6e4; max-width: 640px; margin-bottom: 34px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }

.hero-stats {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px;
  background: rgba(255,255,255,.15);
  border: 1px solid rgba(255,255,255,.15);
  border-radius: var(--radius); overflow: hidden;
  margin-top: 60px;
}
.hero-stats .stat { background: rgba(13,30,51,.72); padding: 22px 26px; }
.hero-stats .num { font-size: 1.7rem; font-weight: 800; color: #fff; }
.hero-stats .num span { color: #ffab63; }
.hero-stats .lbl { font-size: .82rem; color: #9fb3c8; letter-spacing: .04em; }

/* ---------- Sections ---------- */
.section { padding: 84px 0; }
.section.alt { background: var(--bg-alt); }
.section-head { max-width: 720px; margin: 0 auto 52px; text-align: center; }
.section-head .eyebrow {
  display: inline-block; font-size: .78rem; font-weight: 700;
  letter-spacing: .16em; text-transform: uppercase; color: var(--accent);
  margin-bottom: 12px;
}
.section-head p { color: var(--text-muted); margin-top: 14px; }

/* ---------- Category / product cards ---------- */
.grid { display: grid; gap: 26px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.cat-card {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
  overflow: hidden; transition: box-shadow .2s, transform .2s, border-color .2s;
  display: flex; flex-direction: column; text-decoration: none;
}
.cat-card:hover {
  box-shadow: var(--shadow-lg); transform: translateY(-3px);
  border-color: #c3cfdb; text-decoration: none;
}
.cat-card .thumb {
  background: linear-gradient(160deg, #f8fafc 0%, #eef2f7 100%);
  border-bottom: 1px solid var(--border);
  aspect-ratio: 16 / 10; display: flex; align-items: center; justify-content: center;
  padding: 20px;
}
.cat-card .thumb svg { width: 120px; height: auto; }
.cat-card .body { padding: 20px 22px 24px; flex: 1; display: flex; flex-direction: column; }
.cat-card h3 { margin-bottom: 6px; font-size: 1.08rem; }
.cat-card .desc { font-size: .9rem; color: var(--text-muted); flex: 1; }
.cat-card .meta { margin-top: 14px; font-size: .82rem; color: var(--steel); font-weight: 600; }
.cat-card .link-more {
  margin-top: 10px; font-size: .88rem; font-weight: 700; color: var(--link);
  display: inline-flex; align-items: center; gap: 5px;
}

/* featured product card */
.p-card {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
  overflow: hidden; display: flex; flex-direction: column;
  transition: box-shadow .2s, transform .2s;
}
.p-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-3px); }
.p-card .thumb {
  background: linear-gradient(160deg, #f8fafc 0%, #eef2f7 100%);
  border-bottom: 1px solid var(--border);
  aspect-ratio: 4 / 3; display: flex; align-items: center; justify-content: center; padding: 18px;
}
.p-card .thumb svg { width: 100px; height: auto; }
.p-card .body { padding: 18px 20px 20px; display: flex; flex-direction: column; flex: 1; }
.p-card .std { font-size: .74rem; font-weight: 700; color: var(--accent); letter-spacing: .06em; text-transform: uppercase; margin-bottom: 5px; }
.p-card h3 { font-size: 1.02rem; margin-bottom: 8px; }
.p-card .specs { font-size: .84rem; color: var(--text-muted); flex: 1; }
.p-card .specs b { color: var(--text); font-weight: 600; }
.p-card .foot { margin-top: 14px; display: flex; gap: 10px; align-items: center; }
.p-card .foot .btn { padding: 8px 16px; font-size: .85rem; }
.p-card .foot a.details { font-size: .88rem; font-weight: 600; }

/* ---------- USP strip ---------- */
.usp-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 30px; }
.usp { text-align: left; }
.usp .icon {
  width: 52px; height: 52px; border-radius: 12px;
  background: var(--navy); color: #fff;
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 16px;
}
.usp .icon svg { width: 26px; height: 26px; }
.usp h3 { font-size: 1.05rem; margin-bottom: 8px; }
.usp p { font-size: .92rem; color: var(--text-muted); }

/* ---------- CTA band ---------- */
.cta-band { background: var(--navy); color: #fff; padding: 64px 0; }
.cta-band .container { display: flex; align-items: center; justify-content: space-between; gap: 32px; flex-wrap: wrap; }
.cta-band h2 { color: #fff; margin-bottom: 8px; }
.cta-band p { color: #b8c8d9; max-width: 560px; }

/* ---------- Breadcrumb & page hero (subpages) ---------- */
.page-hero {
  background: linear-gradient(100deg, var(--bg-dark), var(--navy-2));
  color: #fff; padding: 52px 0 44px;
}
.page-hero h1 { color: #fff; font-size: 2.1rem; margin-top: 10px; }
.page-hero .sub { color: #b8c8d9; margin-top: 10px; max-width: 640px; }
.breadcrumb { font-size: .84rem; color: #8fa5bb; display: flex; gap: 8px; flex-wrap: wrap; }
.breadcrumb a { color: #cddceb; }

/* ---------- Products page layout ---------- */
.catalog { display: grid; grid-template-columns: 262px 1fr; gap: 40px; padding: 48px 0 84px; }

.filters { position: sticky; top: calc(var(--header-h) + 16px); align-self: start; }
.filters .fgroup {
  border: 1px solid var(--border); border-radius: var(--radius);
  background: #fff; margin-bottom: 18px; overflow: hidden;
}
.filters .fgroup h4 {
  font-size: .82rem; letter-spacing: .1em; text-transform: uppercase;
  padding: 13px 16px; background: var(--bg-alt);
  border-bottom: 1px solid var(--border);
}
.filters .fbody { padding: 10px 8px; }
.filters label.frow {
  display: flex; align-items: center; gap: 9px;
  padding: 7px 10px; font-size: .92rem; cursor: pointer;
  border-radius: 4px; color: var(--text);
}
.filters label.frow:hover { background: var(--bg-alt); }
.filters label.frow input { accent-color: var(--accent); width: 15px; height: 15px; }
.filters label.frow .count { margin-left: auto; font-size: .78rem; color: var(--text-muted); }
.filters .reset { width: 100%; text-align: center; padding: 10px; font-size: .88rem; color: var(--link); background: none; border: 1px dashed var(--border); border-radius: var(--radius); cursor: pointer; }
.filters .reset:hover { background: var(--bg-alt); }

.catalog-head { display: flex; align-items: baseline; justify-content: space-between; gap: 16px; margin-bottom: 6px; flex-wrap: wrap; }
.catalog-head h1 { font-size: 1.7rem; }
.catalog-head .result-info { font-size: .9rem; color: var(--text-muted); }
.catalog-note { color: var(--text-muted); font-size: .95rem; margin-bottom: 26px; max-width: 640px; }

.searchbar {
  display: flex; margin-bottom: 26px; max-width: 520px;
  border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; background: #fff;
}
.searchbar input {
  flex: 1; border: none; outline: none; padding: 12px 16px; font-size: .95rem; font-family: inherit;
}
.searchbar button {
  border: none; background: var(--navy); color: #fff; padding: 0 20px; cursor: pointer;
  font-weight: 600;
}
.searchbar button:hover { background: var(--navy-2); }

.active-tags { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 22px; }
.active-tags .tag {
  display: inline-flex; align-items: center; gap: 7px;
  background: var(--bg-alt); border: 1px solid var(--border);
  border-radius: 999px; padding: 5px 13px; font-size: .82rem; font-weight: 600; color: var(--steel);
  cursor: pointer;
}
.active-tags .tag:hover { border-color: var(--accent); color: var(--accent-dark); }

/* ---------- Product detail ---------- */
.pd { display: grid; grid-template-columns: 480px 1fr; gap: 52px; padding: 52px 0 30px; }
.pd-gallery {
  position: sticky; top: calc(var(--header-h) + 16px); align-self: start;
}
.pd-gallery .main-img {
  border: 1px solid var(--border); border-radius: var(--radius);
  background: linear-gradient(160deg, #f8fafc 0%, #eef2f7 100%);
  aspect-ratio: 1 / .9; display: flex; align-items: center; justify-content: center; padding: 40px;
}
.pd-gallery .main-img svg { width: 78%; max-height: 100%; }
.pd-gallery .badges { display: flex; gap: 10px; margin-top: 16px; flex-wrap: wrap; }
.pd-gallery .badge {
  font-size: .78rem; font-weight: 700; color: var(--steel);
  border: 1px solid var(--border); border-radius: 999px; padding: 6px 14px; background: #fff;
}

.pd-info h1 { font-size: 1.85rem; margin-bottom: 6px; }
.pd-info .std-line { color: var(--accent); font-weight: 700; letter-spacing: .05em; text-transform: uppercase; font-size: .85rem; margin-bottom: 18px; }
.pd-info .summary { color: var(--text-muted); margin-bottom: 26px; }
.pd-info .cta-row { display: flex; gap: 12px; margin: 26px 0 10px; flex-wrap: wrap; }
.pd-info .micro { font-size: .84rem; color: var(--text-muted); }

.spec-table { width: 100%; border-collapse: collapse; font-size: .93rem; background: #fff; }
.spec-table th, .spec-table td { border: 1px solid var(--border); padding: 11px 16px; text-align: left; vertical-align: top; }
.spec-table th { background: var(--bg-alt); width: 218px; color: var(--navy); font-weight: 700; }
.spec-table tr:hover td { background: #fafbfd; }

.dim-table { width: 100%; border-collapse: collapse; font-size: .9rem; }
.dim-table th, .dim-table td { border: 1px solid var(--border); padding: 9px 14px; text-align: center; }
.dim-table th { background: var(--navy); color: #fff; font-weight: 600; border-color: var(--navy); }
.dim-table tbody tr:nth-child(even) { background: var(--bg-alt); }
.table-wrap { overflow-x: auto; border-radius: var(--radius); border: 1px solid var(--border); margin-top: 18px; }
.table-wrap .dim-table { border: none; }

.pd-section { padding: 34px 0 0; }
.pd-section h2 { font-size: 1.4rem; margin-bottom: 18px; }
.pd-section p { color: var(--text-muted); max-width: 800px; }
.pd-section ul.tick { list-style: none; margin-top: 14px; }
.pd-section ul.tick li {
  padding: 7px 0 7px 30px; position: relative; color: var(--text-muted); max-width: 760px;
}
.pd-section ul.tick li::before {
  content: ""; position: absolute; left: 0; top: 12px;
  width: 16px; height: 16px; border-radius: 50%;
  background: var(--accent) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='4'%3E%3Cpath d='M5 13l4 4 10-10'/%3E%3C/svg%3E") center/10px no-repeat;
}

.related { padding: 26px 0 90px; }
.related h2 { font-size: 1.4rem; margin-bottom: 24px; }

/* ---------- About page ---------- */
.about-grid { display: grid; grid-template-columns: 1.1fr 1fr; gap: 56px; align-items: start; }
.about-visual {
  border-radius: var(--radius); background: linear-gradient(150deg, var(--navy) 0%, var(--navy-2) 100%);
  color: #fff; padding: 40px; display: flex; flex-direction: column; gap: 22px;
}
.about-visual .av-row { display: flex; gap: 16px; align-items: flex-start; }
.about-visual .av-num { font-size: 1.9rem; font-weight: 800; color: #ffab63; min-width: 96px; }
.about-visual .av-lbl { font-size: .92rem; color: #c9d6e4; padding-top: 6px; }

.cert-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.cert-card {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
  padding: 28px 24px; text-align: center; transition: box-shadow .2s;
}
.cert-card:hover { box-shadow: var(--shadow); }
.cert-card .seal {
  width: 64px; height: 64px; margin: 0 auto 16px; border-radius: 50%;
  border: 3px solid var(--navy); color: var(--navy);
  display: flex; align-items: center; justify-content: center;
  font-weight: 800; font-size: .8rem; letter-spacing: .02em;
}
.cert-card h3 { font-size: 1rem; margin-bottom: 6px; }
.cert-card p { font-size: .86rem; color: var(--text-muted); }

.timeline { position: relative; margin-top: 10px; padding-left: 28px; }
.timeline::before { content: ""; position: absolute; left: 7px; top: 6px; bottom: 6px; width: 2px; background: var(--border); }
.timeline .tl-item { position: relative; padding-bottom: 26px; }
.timeline .tl-item::before {
  content: ""; position: absolute; left: -28px; top: 6px;
  width: 16px; height: 16px; border-radius: 50%;
  background: #fff; border: 3px solid var(--accent);
}
.timeline .tl-year { font-weight: 800; color: var(--navy); }
.timeline p { color: var(--text-muted); font-size: .93rem; }

/* ---------- Contact ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1.4fr; gap: 48px; padding: 52px 0 90px; align-items: start; }
.contact-cards { display: grid; gap: 18px; }
.contact-card {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 22px 24px;
  display: flex; gap: 16px; align-items: flex-start;
}
.contact-card .icon {
  width: 44px; height: 44px; flex: none; border-radius: 10px;
  background: var(--bg-alt); color: var(--navy);
  display: flex; align-items: center; justify-content: center;
}
.contact-card .icon svg { width: 22px; height: 22px; }
.contact-card h3 { font-size: .98rem; margin-bottom: 3px; }
.contact-card p, .contact-card a { font-size: .92rem; color: var(--text-muted); }
.contact-card a { font-weight: 600; }

.rfq-form {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
  padding: 34px 36px; box-shadow: var(--shadow);
}
.rfq-form h2 { font-size: 1.4rem; margin-bottom: 6px; }
.rfq-form .hint { font-size: .9rem; color: var(--text-muted); margin-bottom: 24px; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form-grid .full { grid-column: 1 / -1; }
.fgroup label { display: block; font-size: .86rem; font-weight: 600; color: var(--navy); margin-bottom: 6px; }
.fgroup label .req { color: #c0392b; }
.fgroup input, .fgroup select, .fgroup textarea {
  width: 100%; padding: 11px 14px; font-size: .95rem; font-family: inherit;
  border: 1px solid var(--border); border-radius: var(--radius); outline: none;
  background: #fff; color: var(--text); transition: border-color .15s, box-shadow .15s;
}
.fgroup input:focus, .fgroup select:focus, .fgroup textarea:focus {
  border-color: var(--link); box-shadow: 0 0 0 3px rgba(26, 95, 180, .12);
}
.fgroup textarea { min-height: 120px; resize: vertical; }
.rfq-form .submit-row { margin-top: 24px; display: flex; align-items: center; gap: 16px; flex-wrap: wrap; }
.rfq-form .note { font-size: .82rem; color: var(--text-muted); }
.form-success {
  display: none; background: #eef8f0; border: 1px solid #bfe3c8; color: #1e6b34;
  border-radius: var(--radius); padding: 14px 18px; font-size: .93rem; margin-top: 18px;
}

/* ---------- Footer ---------- */
.site-footer { background: var(--bg-dark); color: #93a8bd; margin-top: 0; }
.footer-main {
  display: grid; grid-template-columns: 1.5fr 1fr 1fr 1.3fr; gap: 44px;
  padding: 64px 0 48px;
}
.site-footer h4 { color: #fff; font-size: .95rem; letter-spacing: .06em; text-transform: uppercase; margin-bottom: 18px; }
.site-footer ul { list-style: none; }
.site-footer li { margin-bottom: 10px; font-size: .92rem; }
.site-footer a { color: #93a8bd; }
.site-footer a:hover { color: #fff; }
.footer-brand .brand-name { color: #fff; }
.footer-brand p { font-size: .92rem; margin-top: 14px; max-width: 320px; }
.footer-cert { display: flex; gap: 10px; margin-top: 20px; flex-wrap: wrap; }
.footer-cert span {
  border: 1px solid #2c4560; border-radius: 4px; padding: 5px 12px;
  font-size: .74rem; font-weight: 700; letter-spacing: .08em; color: #b8c8d9;
}
.footer-bottom {
  border-top: 1px solid #1d3450; padding: 20px 0;
  display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap;
  font-size: .82rem;
}

/* sticky mobile inquiry bar */
.inquiry-bar {
  display: none; position: fixed; bottom: 0; left: 0; right: 0; z-index: 90;
  background: #fff; border-top: 1px solid var(--border);
  padding: 10px 16px; gap: 12px;
}
.inquiry-bar .btn { flex: 1; }

/* ---------- Responsive ---------- */
@media (max-width: 1020px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .usp-grid { grid-template-columns: repeat(2, 1fr); }
  .pd { grid-template-columns: 1fr; gap: 32px; }
  .pd-gallery { position: static; }
  .about-grid { grid-template-columns: 1fr; }
  .footer-main { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 860px) {
  .hero h1 { font-size: 2.2rem; }
  .hero { padding: 68px 0 80px; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }

  .main-nav {
    display: none; position: absolute; top: var(--header-h); left: 0; right: 0;
    background: #fff; border-bottom: 1px solid var(--border);
    flex-direction: column; align-items: stretch; padding: 12px 20px 20px;
    box-shadow: var(--shadow-lg); gap: 2px;
  }
  .main-nav.open { display: flex; }
  .main-nav a { padding: 13px 10px; border-bottom: 1px solid var(--bg-alt); border-radius: 0; }
  .main-nav a.active { box-shadow: inset 3px 0 0 var(--accent); }
  .nav-toggle { display: block; }
  .header-cta { display: none; }

  .catalog { grid-template-columns: 1fr; gap: 24px; }
  .filters { position: static; }
  .contact-grid { grid-template-columns: 1fr; }
  .inquiry-bar { display: flex; }
  body { padding-bottom: 66px; }
}

@media (max-width: 560px) {
  .grid-3, .grid-4, .usp-grid, .cert-grid, .form-grid { grid-template-columns: 1fr; }
  .footer-main { grid-template-columns: 1fr; gap: 32px; }
  h1 { font-size: 1.9rem; }
  .section { padding: 60px 0; }
  .rfq-form { padding: 24px 20px; }
  .topbar .tb-links { justify-content: center; }
}