/* ==========================================================================
   KTK Industries — palette matched to the real logo: slate-navy towers,
   cyan-blue "T" and accents.
   ========================================================================== */
:root {
  --color-primary: #2c4a5e;
  --color-primary-dark: #1c303d;
  --color-accent: #229ed4;
  --color-accent-dark: #1a7fac;
  --color-ink: #1c2226;
  --color-body: #4a5560;
  --color-muted: #6b7580;
  --color-line: #e2e6ea;
  --color-surface: #ffffff;
  --color-surface-alt: #f5f7f9;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --radius: 6px;
  --shadow-sm: 0 1px 3px rgba(20, 48, 77, 0.08);
  --shadow-md: 0 8px 24px rgba(20, 48, 77, 0.12);
  --container-width: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--color-ink);
  background: var(--color-surface);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--color-primary); text-decoration: none; }
h1, h2, h3, h4 { line-height: 1.2; margin: 0 0 0.5em; color: var(--color-ink); }
p { margin: 0 0 1em; color: var(--color-body); }
ul { margin: 0; padding: 0; list-style: none; }
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}
.skip-link {
  position: absolute; left: -999px; top: 0; background: var(--color-primary);
  color: #fff; padding: 0.75em 1em; z-index: 100;
}
.skip-link:focus { left: 0; }

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

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: 8px; font-weight: 600; border-radius: var(--radius);
  padding: 0.85em 1.6em; border: 2px solid transparent; cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
  font-size: 0.95rem;
}
.btn--primary { background: var(--color-accent); color: #fff; }
.btn--primary:hover { background: var(--color-accent-dark); }
.btn--outline { border-color: var(--color-primary); color: var(--color-primary); background: transparent; }
.btn--outline:hover { background: var(--color-primary); color: #fff; }
.btn--lg { padding: 1em 2em; font-size: 1rem; }
.btn--sm { padding: 0.55em 1.2em; font-size: 0.85rem; }

/* Legal / compliance bar */
.legal-bar { background: var(--color-primary-dark); color: #fff; padding: 7px 0; }
.legal-bar__inner {
  display: flex; flex-wrap: wrap; justify-content: center; align-items: center;
  gap: 4px 6px; text-align: center; font-size: 0.78rem; line-height: 1.4;
}
.legal-bar__inner span { color: #cfd9e3; }
.legal-bar__inner a { color: #fff; font-weight: 600; text-decoration: underline; text-underline-offset: 2px; }
.legal-bar__inner a:hover { color: #7fd4f0; }
@media (max-width: 640px) {
  .legal-bar__inner { font-size: 0.72rem; padding: 0 12px; }
}

/* Header */
.site-header {
  border-bottom: 1px solid var(--color-line);
  position: sticky; top: 0; background: var(--color-surface); z-index: 50;
}
.site-header__inner {
  display: flex; align-items: center; justify-content: space-between;
  gap: 24px; padding-top: 14px; padding-bottom: 14px;
}
.brand { display: flex; align-items: center; gap: 10px; color: var(--color-ink); }
.brand__logo { display: block; height: 56px; width: auto; }
.brand__logo-badge {
  display: inline-flex; align-items: center; justify-content: center;
  background: #fff; border-radius: 8px; padding: 6px 10px;
}
.brand__logo-badge img { height: 50px; width: auto; display: block; }
.site-nav__menu { display: flex; gap: 28px; }
.site-nav__menu a {
  color: var(--color-ink); font-weight: 600; font-size: 0.95rem;
  padding: 6px 0; border-bottom: 2px solid transparent;
}
.site-nav__menu a:hover, .site-nav__menu a[aria-current="page"] {
  color: var(--color-accent); border-bottom-color: var(--color-accent);
}
.site-nav__toggle {
  display: none; flex-direction: column; gap: 4px; background: none;
  border: 0; cursor: pointer; padding: 8px;
}
.site-nav__toggle span { width: 22px; height: 2px; background: var(--color-ink); }
.site-header__actions { display: flex; align-items: center; gap: 18px; flex-shrink: 0; }
.site-header__cta { flex-shrink: 0; }
.site-nav__brochure-mobile { display: none; }

/* Hero */
.hero { background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark)); color: #fff; padding: 88px 0; overflow: hidden; }
.hero__inner { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 48px; align-items: center; }
.hero__content { max-width: 640px; }
.hero__media { display: flex; justify-content: center; }
.hero__media img { max-width: 100%; height: auto; filter: drop-shadow(0 20px 40px rgba(0,0,0,0.35)); }
.eyebrow {
  text-transform: uppercase; letter-spacing: 0.12em; font-size: 0.78rem;
  font-weight: 700; color: var(--color-accent); margin-bottom: 12px;
}
.hero .eyebrow { color: #7fd4f0; }
.hero h1 { font-size: clamp(2rem, 4vw, 2.75rem); color: #fff; }
.hero__lede { color: #cfd9e3; font-size: 1.08rem; }
.hero__actions { display: flex; gap: 14px; margin: 28px 0; flex-wrap: wrap; }
.hero .btn--outline { border-color: #fff; color: #fff; }
.hero .btn--outline:hover { background: #fff; color: var(--color-primary); }
.hero__rating { display: flex; align-items: center; gap: 8px; color: #cfd9e3; font-size: 0.9rem; }
.stars { color: #f5b942; letter-spacing: 2px; }

/* Value props */
.value-props { padding: 64px 0; background: var(--color-surface-alt); }
.value-props__grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 28px;
}
.value-prop h3 { color: var(--color-accent); font-size: 1.05rem; }
.value-prop p { margin: 0; font-size: 0.92rem; }

/* Section heading */
.section-heading {
  display: flex; align-items: baseline; justify-content: space-between;
  margin-bottom: 28px; flex-wrap: wrap; gap: 8px;
}
.section-heading__link { font-weight: 600; font-size: 0.9rem; }

/* Featured / catalog */
.category-cards { padding: 56px 0 0; }
.category-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.category-card {
  display: flex; flex-direction: column; gap: 6px; padding: 28px 24px;
  border-radius: var(--radius); border: 1px solid var(--color-line);
  border-top: 4px solid var(--cat-color, var(--color-accent));
  background: var(--color-surface-alt); transition: box-shadow 0.15s ease, transform 0.15s ease;
}
.category-card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
.category-card__label { font-size: 1.15rem; font-weight: 700; color: var(--color-ink); }
.category-card__desc { font-size: 0.88rem; color: var(--color-muted); }
.category-card__link { margin-top: 10px; font-weight: 600; font-size: 0.88rem; color: var(--cat-color, var(--color-accent)); }
@media (max-width: 700px) {
  .category-grid { grid-template-columns: 1fr; }
}

.featured-products, .catalog { padding: 72px 0; }
.product-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 24px;
}
.product-card {
  border: 1px solid var(--color-line); border-radius: var(--radius); overflow: hidden;
  background: #fff; transition: box-shadow 0.15s ease, transform 0.15s ease;
}
.product-card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
.product-card__media { display: block; background: var(--color-surface-alt); aspect-ratio: 4/3; }
.product-card__media img { width: 100%; height: 100%; object-fit: cover; }
.product-card__body { padding: 18px; }
.product-card__category {
  text-transform: uppercase; font-size: 0.7rem; font-weight: 700;
  letter-spacing: 0.06em; color: var(--color-accent); margin-bottom: 6px;
}
.product-card__title { font-size: 1.05rem; margin-bottom: 6px; }
.product-card__title a { color: var(--color-ink); }
.product-card__tagline { font-size: 0.88rem; margin-bottom: 10px; }
.product-card__link { font-weight: 600; font-size: 0.88rem; }

/* Filters */
.catalog__filters { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 32px; }
.filter-btn {
  border: 1px solid var(--color-line); background: #fff; border-radius: 999px;
  padding: 0.55em 1.2em; font-size: 0.86rem; font-weight: 600; cursor: pointer;
  color: var(--color-body);
}
.filter-btn.is-active, .filter-btn:hover { border-color: var(--color-accent); color: var(--color-accent); }

/* Testimonials */
.testimonials { padding: 72px 0; background: var(--color-surface-alt); }
.testimonials h2 { text-align: center; margin-bottom: 36px; }
.testimonial-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 20px; }
.testimonial {
  background: #fff; border: 1px solid var(--color-line); border-radius: var(--radius);
  padding: 22px; margin: 0;
}
.testimonial p { font-style: italic; margin-bottom: 12px; color: var(--color-ink); font-size: 0.92rem; }
.testimonial footer { font-size: 0.8rem; color: var(--color-muted); }

/* CTA band */
.cta-band { background: var(--color-primary); color: #fff; padding: 48px 0; }
.cta-band__inner { display: flex; align-items: center; justify-content: space-between; gap: 24px; flex-wrap: wrap; }
.cta-band h2 { color: #fff; margin-bottom: 6px; }
.cta-band p { color: #cfd9e3; margin: 0; }
.cta-band--accent { background: var(--color-accent); }
.cta-band--accent p { color: rgba(255,255,255,0.85); }
.cta-band__brochure-btn { background: #fff; color: var(--color-accent-dark); }
.cta-band__brochure-btn:hover { background: #f0f0f0; }

/* Page header (products/contact) */
.page-header { padding: 56px 0 32px; border-bottom: 1px solid var(--color-line); }
.page-header h1 { font-size: 2rem; }
.page-header p { max-width: 640px; }

/* Breadcrumbs */
.breadcrumbs { padding: 18px 0; font-size: 0.85rem; color: var(--color-muted); }
.breadcrumbs a { color: var(--color-muted); }
.breadcrumbs a:hover { color: var(--color-accent); }

/* Product detail */
.product-detail { padding: 48px 0 72px; }
.product-detail__grid { display: grid; grid-template-columns: minmax(0, 420px) 1fr; gap: 48px; }
.product-detail__media img {
  border-radius: var(--radius); border: 1px solid var(--color-line);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--product-accent, var(--color-accent)) 12%, transparent);
}
.product-detail__altname { color: var(--color-muted); font-weight: 400; font-size: 0.65em; }
.product-detail__tagline { font-size: 1.1rem; color: var(--product-accent, var(--color-accent)); font-weight: 600; }
.product-detail__sizes ul { display: flex; gap: 10px; flex-wrap: wrap; margin: 12px 0 20px; }
.product-detail__sizes li {
  border: 1.5px solid var(--product-accent, var(--color-accent));
  border-radius: 999px; padding: 6px 16px;
}
.size-label { font-weight: 700; font-size: 0.88rem; color: var(--color-ink); }
.product-detail__usecases ul { margin-top: 10px; }
.product-detail__usecases li {
  padding: 8px 0 8px 26px; position: relative; border-bottom: 1px dashed var(--color-line);
  color: var(--color-body); font-size: 0.94rem;
}
.product-detail__usecases li::before {
  content: "✓"; position: absolute; left: 0; color: var(--product-accent, var(--color-accent)); font-weight: 700;
}
.product-detail__actions .btn--primary {
  background: var(--product-accent, var(--color-accent));
}
.product-detail__actions .btn--primary:hover { filter: brightness(0.9); }
.product-detail__actions { display: flex; gap: 14px; margin-top: 28px; flex-wrap: wrap; }

.work-in-field { padding: 0 0 72px; }
.work-in-field__grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: center;
  background: var(--color-surface-alt); border-radius: var(--radius); overflow: hidden;
}
.work-in-field__grid img { width: 100%; height: 100%; object-fit: cover; max-height: 420px; }
.work-in-field__grid > div { padding: 0 36px 0 0; }
.work-in-field__grid h2 { font-size: 1.4rem; }
@media (max-width: 860px) {
  .work-in-field__grid { grid-template-columns: 1fr; }
  .work-in-field__grid > div { padding: 24px; }
  .work-in-field__grid img { max-height: 280px; }
  .hero__inner { grid-template-columns: 1fr; }
  .hero__media { order: -1; max-width: 320px; margin: 0 auto; }
}

.related-products { padding: 0 0 72px; }
.related-products h2 { margin-bottom: 24px; }

.quote-band { padding: 0 0 72px; }
.quote-band .quote-form { max-width: 680px; margin: 0 auto; background: var(--color-surface-alt); padding: 36px; border-radius: var(--radius); }

/* About */
.about-section { padding: 56px 0 72px; }
.about-grid { display: grid; grid-template-columns: 1.8fr 1fr; gap: 48px; }
.about-grid h2 { font-size: 1.3rem; margin-top: 1.4em; }
.about-grid h2:first-child { margin-top: 0; }
.about-stats { display: flex; flex-direction: column; gap: 16px; align-self: start; }
.about-stat {
  background: var(--color-surface-alt); border: 1px solid var(--color-line);
  border-radius: var(--radius); padding: 20px;
}
.about-stat strong { display: block; font-size: 1.6rem; color: var(--color-accent); margin-bottom: 4px; }
.about-stat span { font-size: 0.86rem; color: var(--color-muted); }

/* FAQ */
.faq-section { padding: 56px 0 72px; }
.faq-list { max-width: 780px; }
.faq-item { border-bottom: 1px solid var(--color-line); padding: 20px 0; }
.faq-item summary {
  cursor: pointer; font-weight: 700; font-size: 1.02rem; color: var(--color-ink);
  list-style: none; display: flex; justify-content: space-between; align-items: center; gap: 12px;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; font-size: 1.4rem; color: var(--color-accent); flex-shrink: 0; }
.faq-item[open] summary::after { content: "\2212"; }
.faq-item p { margin-top: 12px; margin-bottom: 0; }

/* Legal pages */
.legal-content { padding: 48px 0 80px; max-width: 780px; }
.legal-content h2 { margin-top: 1.6em; font-size: 1.15rem; }
.legal-content ul { list-style: disc; padding-left: 1.4em; margin-bottom: 1em; }
.legal-content li { margin-bottom: 0.4em; color: var(--color-body); }
.legal-content .updated { color: var(--color-muted); font-size: 0.85rem; }

/* Contact */
.contact-section { padding: 48px 0 80px; }
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; }
.contact-info dl { margin: 20px 0; }
.contact-info dl > div { margin-bottom: 18px; }
.contact-info dt { font-weight: 700; font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.04em; color: var(--color-muted); margin-bottom: 4px; }
.contact-info dd { margin: 0; color: var(--color-ink); }
.contact-map { border-radius: var(--radius); overflow: hidden; border: 1px solid var(--color-line); margin-top: 16px; }
.contact-map iframe { width: 100%; height: 280px; border: 0; display: block; }
.contact-form .quote-form { background: var(--color-surface-alt); padding: 32px; border-radius: var(--radius); }

/* Forms */
.quote-form h2 { margin-bottom: 4px; }
.form-row { margin-bottom: 16px; }
.form-row--split { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-row label { display: block; font-weight: 600; font-size: 0.88rem; margin-bottom: 6px; }
.form-row input, .form-row textarea {
  width: 100%; padding: 0.7em 0.9em; border: 1px solid var(--color-line);
  border-radius: var(--radius); font: inherit; color: var(--color-ink);
  background: #fff;
}
.form-row input:focus, .form-row textarea:focus { outline: 2px solid var(--color-accent); outline-offset: 1px; }
.form-success {
  background: #e9f6ee; border: 1px solid #b6e2c3; color: #1e6b3a;
  padding: 14px 16px; border-radius: var(--radius); margin-top: 16px; font-size: 0.9rem;
}

/* Footer */
.site-footer { background: var(--color-primary-dark); color: #cfd9e3; padding-top: 56px; }
.site-footer__grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1.2fr; gap: 32px; padding-bottom: 40px; }
.site-footer h3 { color: #fff; font-size: 0.95rem; margin-bottom: 14px; }
.site-footer a { color: #cfd9e3; }
.site-footer a:hover { color: var(--color-accent); }
.site-footer p { color: #a7b4c0; font-size: 0.88rem; }
.site-footer li { margin-bottom: 8px; font-size: 0.88rem; }
.site-footer .brand { color: #fff; margin-bottom: 12px; }
.site-footer__quality { color: #fff; font-weight: 600; font-size: 0.88rem; }
.site-footer__rating { color: #f5b942; font-size: 0.85rem; }
.site-footer__bottom { border-top: 1px solid rgba(255,255,255,0.1); padding: 18px 0; margin-top: 8px; }
.site-footer__bottom-inner { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 10px; }
.site-footer__bottom p { margin: 0; font-size: 0.8rem; color: #7e8fa0; }
.site-footer__legal { display: flex; gap: 18px; }
.site-footer__legal a { font-size: 0.8rem; color: #7e8fa0; }
.site-footer__legal a:hover { color: var(--color-accent); }

/* WhatsApp floating button */
.whatsapp-fab {
  position: fixed; right: 20px; bottom: 20px; width: 56px; height: 56px;
  border-radius: 50%; background: #25d366; color: #fff;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 4px 14px rgba(0,0,0,0.25); z-index: 60;
  transition: transform 0.15s ease;
}
.whatsapp-fab:hover { transform: scale(1.08); }

/* Brochure link */
.brochure-link {
  display: inline-flex; align-items: center; gap: 6px;
  font-weight: 600; font-size: 0.9rem; color: var(--color-primary);
}
.brochure-link svg { flex-shrink: 0; }

/* Quality band */
.quality-band { background: var(--color-surface-alt); padding: 48px 0; border-top: 1px solid var(--color-line); border-bottom: 1px solid var(--color-line); }
.quality-band__inner { max-width: 720px; margin: 0 auto; text-align: center; }
.quality-band h2 { font-size: 1.5rem; color: var(--color-primary); }
.quality-band p { margin: 0; font-size: 1.02rem; }

/* Responsive */
@media (max-width: 860px) {
  .product-detail__grid, .contact-grid { grid-template-columns: 1fr; }
  .site-footer__grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 700px) {
  .site-nav__toggle { display: flex; }
  .site-nav__menu {
    position: absolute; top: 100%; left: 0; right: 0; background: #fff;
    flex-direction: column; gap: 0; border-top: 1px solid var(--color-line);
    box-shadow: var(--shadow-md); display: none;
  }
  .site-nav__menu.is-open { display: flex; }
  .site-nav__menu li { border-bottom: 1px solid var(--color-line); }
  .site-nav__menu a { display: block; padding: 14px 24px; }
  .site-header__actions { display: none; }
  .site-nav__brochure-mobile { display: block; }
  .form-row--split { grid-template-columns: 1fr; }
  .site-footer__grid { grid-template-columns: 1fr; }
  .cta-band__inner { flex-direction: column; align-items: flex-start; }
}