/* ==========================================================================
   Armstrong Industries (AU) — industrial-engineering redesign concept
   Same blue brand, but a HARD technical identity — deliberately NOT the
   warm rounded SA site. Blueprint grids, chamfered corners, monospace
   spec labels, steel-cool greys. No pill buttons.
   ========================================================================== */

:root {
  /* Blue accent (AU brand) */
  --blue: #006eff;
  --blue-2: #2f7bff;
  --blue-deep: #0049c7;
  --blue-glow: #5aa2ff;

  /* Steel-cool greys (no true black, cooler than SA warm charcoal) */
  --steel-950: #0d1015;
  --steel-900: #14181f;
  --steel-850: #1a1f27;
  --steel-800: #222831;
  --steel-700: #2e3540;
  --steel-600: #414b58;

  /* Light / concrete */
  --bg: #f1f2f4;
  --surface: #ffffff;
  --concrete: #e9ebee;
  --text: #40474f;
  --heading: #14181d;
  --muted: #7b828c;
  --line: #d8dce1;

  --font-body: "Karla", HelveticaNeue, "Helvetica Neue", Arial, sans-serif;
  --font-heading: "Unica One", HelveticaNeue, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, "SF Mono", Consolas, monospace;

  --gutter: 20px;
  --max-width: 1280px;

  /* Chamfered corner (cut) sizes */
  --cut: 14px;
  --cut-lg: 22px;

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

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  font-size: 16.5px;
  line-height: 1.66;
  color: var(--text);
  background: var(--bg);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { font-family: inherit; cursor: pointer; }

h1, h2, h3, .title {
  font-family: var(--font-heading);
  font-weight: 400;
  text-transform: uppercase;
  color: var(--heading);
  line-height: 1.02;
  letter-spacing: 0.005em;
}

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

/* Chamfer helper: cuts top-left + bottom-right corners */
.chamfer { clip-path: polygon(var(--cut) 0, 100% 0, 100% calc(100% - var(--cut)), calc(100% - var(--cut)) 100%, 0 100%, 0 var(--cut)); }

/* Mono engineering label */
.mono { font-family: var(--font-mono); }
.eng-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--blue);
}

/* ============ Buttons — hard chamfered, no pills ============ */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 9px;
  font-family: var(--font-body); font-size: 0.82rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.07em; text-align: center;
  padding: 15px 26px; border: 1px solid transparent;
  clip-path: polygon(10px 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%, 0 10px);
  transition: transform 0.22s var(--ease), filter 0.22s ease, background 0.22s ease, color 0.22s ease;
  position: relative;
}
.btn--primary { background: var(--blue); color: #fff; box-shadow: 0 10px 24px rgba(0,110,255,0.28); }
.btn--primary:hover { background: var(--blue-2); transform: translateY(-2px); filter: brightness(1.05); }
.btn--ghost { background: rgba(13,16,21,0.35); border-color: rgba(255,255,255,0.35); color: #fff; backdrop-filter: blur(4px); }
.btn--ghost:hover { background: rgba(255,255,255,0.14); }
.btn--light { background: var(--bg); color: var(--heading); }
.btn--light:hover { background: #fff; transform: translateY(-2px); }
.btn--sm { padding: 11px 18px; font-size: 0.74rem; }
.btn span { font-family: var(--font-mono); }

/* ============ Top rail ============ */
.top-rail {
  background: var(--steel-950);
  border-bottom: 1px solid rgba(255,255,255,0.08);
  font-family: var(--font-mono);
  color: rgba(255,255,255,0.6);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
}
.top-rail__inner { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding-top: 9px; padding-bottom: 9px; }
.top-rail__tag { color: var(--blue-glow); font-weight: 600; }
.top-rail__mid { white-space: nowrap; overflow: hidden; }
.top-rail__link { color: rgba(255,255,255,0.8); font-weight: 600; transition: color 0.2s ease; }
.top-rail__link:hover { color: var(--blue-glow); }

/* ============ Header ============ */
.site-header {
  background: var(--steel-900);
  position: sticky; top: 0; z-index: 60;
  border-bottom: 1px solid rgba(255,255,255,0.07);
  transition: background 0.3s ease, box-shadow 0.3s ease;
}
.site-header.is-scrolled { background: rgba(20,24,31,0.9); backdrop-filter: blur(14px) saturate(140%); box-shadow: 0 8px 30px rgba(0,0,0,0.4); }
.header__inner { display: flex; align-items: center; justify-content: space-between; gap: 24px; padding-top: 18px; padding-bottom: 18px; }
.logo { flex: 0 0 auto; display: flex; align-items: center; }
.logo img { max-height: 66px; width: auto; transition: max-height 0.3s var(--ease); }
.site-header.is-scrolled .logo img { max-height: 50px; }

.main-nav { display: flex; align-items: center; }
.nav-link {
  display: block; padding: 10px 15px; color: rgba(255,255,255,0.72);
  font-family: var(--font-mono); font-weight: 500; font-size: 0.78rem;
  letter-spacing: 0.06em; text-transform: uppercase;
  position: relative; transition: color 0.2s ease;
}
.nav-link::after {
  content: ""; position: absolute; left: 15px; right: 15px; bottom: 4px; height: 2px;
  background: var(--blue-2); transform: scaleX(0); transform-origin: left;
  transition: transform 0.25s var(--ease);
}
.nav-link:hover { color: #fff; }
.nav-link:hover::after, .nav-link--active::after { transform: scaleX(1); }
.nav-link--active { color: var(--blue-glow); }
.nav-caret { font-size: 0.6rem; opacity: 0.7; }

.nav-drop { position: relative; }
.nav-drop__panel {
  position: absolute; top: 100%; left: 0; min-width: 250px;
  background: var(--steel-850); border: 1px solid rgba(255,255,255,0.1);
  box-shadow: 0 24px 50px rgba(0,0,0,0.5);
  opacity: 0; visibility: hidden; transform: translateY(8px);
  transition: opacity 0.2s ease, transform 0.22s var(--ease), visibility 0.2s;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%);
}
.nav-drop:hover .nav-drop__panel { opacity: 1; visibility: visible; transform: translateY(0); }
.nav-drop__link {
  display: flex; align-items: center; justify-content: space-between; padding: 11px 16px;
  font-size: 0.9rem; color: rgba(255,255,255,0.82);
  border-bottom: 1px solid rgba(255,255,255,0.05);
  transition: background 0.15s ease, color 0.15s ease;
}
.nav-drop__link:last-child { border-bottom: none; }
.nav-drop__link:hover { background: var(--blue); color: #fff; }
.nav-drop__link em { font-family: var(--font-mono); font-style: normal; font-size: 0.7rem; letter-spacing: 0.1em; opacity: 0.5; }

.header-side { display: flex; align-items: center; gap: 10px; }
.header-side .btn--primary { padding: 11px 20px; font-size: 0.74rem; }
.menu-btn { display: none; background: none; border: 1px solid rgba(255,255,255,0.3); color: #fff; padding: 8px; }
.menu-btn svg { width: 24px; height: 24px; stroke: currentColor; fill: none; stroke-width: 2; }

/* ============ Hero ============ */
.hero { position: relative; background: var(--steel-950); min-height: 680px; display: flex; align-items: center; overflow: hidden; }
.hero__media { position: absolute; inset: 0; }
.hero__slide {
  position: absolute; inset: 0; background-size: cover; background-position: center;
  opacity: 0; transform: scale(1.08); transition: opacity 0.9s ease, transform 7s var(--ease);
}
.hero__slide.is-active { opacity: 1; transform: scale(1); }
.hero__media::after { content: ""; position: absolute; inset: 0; z-index: 1; background: linear-gradient(100deg, rgba(13,16,21,0.88) 0%, rgba(13,16,21,0.55) 45%, rgba(13,16,21,0.25) 100%); }
.hero__grid {
  position: absolute; inset: 0; z-index: 1; opacity: 0.35; pointer-events: none;
  background-image: linear-gradient(rgba(47,123,255,0.14) 1px, transparent 1px), linear-gradient(90deg, rgba(47,123,255,0.14) 1px, transparent 1px);
  background-size: 56px 56px;
  -webkit-mask-image: linear-gradient(90deg, #000 0%, transparent 70%);
  mask-image: linear-gradient(90deg, #000 0%, transparent 70%);
}

.hero__content { position: relative; z-index: 3; padding-top: 60px; padding-bottom: 60px; max-width: 720px; }
.hero__index { display: inline-block; font-family: var(--font-mono); font-size: 0.75rem; font-weight: 600; letter-spacing: 0.22em; color: var(--blue-glow); margin-bottom: 22px; }
.hero__title { color: #fff; font-size: clamp(2.8rem, 6.4vw, 5.2rem); margin-bottom: 22px; }
.hero__sub { color: rgba(255,255,255,0.88); font-size: clamp(1.05rem, 1.7vw, 1.28rem); max-width: 540px; margin-bottom: 32px; }
.hero__actions { display: flex; gap: 14px; flex-wrap: wrap; }

.hero__content { animation: heroIn 0.9s var(--ease) both; }
@keyframes heroIn { from { opacity: 0; transform: translateY(24px); } to { opacity: 1; transform: none; } }

/* ============ Live spec panel ============ */
.spec-panel {
  position: absolute; z-index: 4; right: 32px; top: 50%;
  width: 300px; background: rgba(20,24,31,0.72); backdrop-filter: blur(14px);
  border: 1px solid rgba(255,255,255,0.14); border-left: 3px solid var(--blue);
  padding: 22px 22px 18px; color: #fff;
  transform: translateY(-50%);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 14px), calc(100% - 14px) 100%, 0 100%);
  animation: panelIn 0.9s var(--ease) 0.2s both;
}
@keyframes panelIn { from { opacity: 0; transform: translateY(-50%) translateX(30px); } to { opacity: 1; transform: translateY(-50%) translateX(0); } }
.spec-panel__head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 14px; }
.spec-panel__label { font-family: var(--font-mono); font-size: 0.66rem; letter-spacing: 0.24em; color: var(--blue-glow); font-weight: 600; }
.spec-panel__idx { font-family: var(--font-mono); font-size: 0.9rem; color: rgba(255,255,255,0.5); }
.spec-panel__name { font-family: var(--font-heading); font-size: 1.3rem; text-transform: uppercase; margin-bottom: 16px; line-height: 1.15; }
.spec-panel__rows { display: grid; gap: 11px; margin-bottom: 18px; }
.spec-panel__rows > div { display: flex; justify-content: space-between; align-items: baseline; padding-bottom: 8px; border-bottom: 1px dashed rgba(255,255,255,0.14); }
.spec-panel__rows dt { font-family: var(--font-mono); font-size: 0.68rem; letter-spacing: 0.1em; text-transform: uppercase; color: rgba(255,255,255,0.5); }
.spec-panel__rows dd { font-family: var(--font-mono); font-size: 0.8rem; color: #fff; font-weight: 500; }
.spec-panel__cta { display: inline-flex; align-items: center; gap: 8px; font-family: var(--font-mono); font-size: 0.76rem; font-weight: 600; letter-spacing: 0.06em; color: var(--blue-glow); text-transform: uppercase; }
.spec-panel__cta span { transition: transform 0.25s var(--ease); }
.spec-panel__cta:hover span { transform: translateX(4px); }

/* ============ Hero bar (dots + arrows) ============ */
.hero__bar {
  position: absolute; z-index: 4; left: 0; right: 0; bottom: 0;
  display: flex; align-items: center; gap: 18px;
  padding: 18px 32px; background: linear-gradient(0deg, rgba(13,16,21,0.85), transparent);
}
.hero__bar-btn { background: none; border: 1px solid rgba(255,255,255,0.3); color: #fff; width: 38px; height: 34px; font-family: var(--font-mono); font-size: 0.9rem; clip-path: polygon(8px 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%, 0 8px); transition: background 0.2s ease, border-color 0.2s ease; }
.hero__bar-btn:hover { background: var(--blue); border-color: var(--blue); }
.hero__bar-track { display: flex; gap: 8px; align-items: center; }
.hero__bar-dot { width: 14px; height: 14px; border: 1px solid rgba(255,255,255,0.5); background: transparent; clip-path: polygon(4px 0, 100% 0, 100% calc(100% - 4px), calc(100% - 4px) 100%, 0 100%, 0 4px); transition: background 0.25s ease, border-color 0.25s ease, transform 0.25s var(--ease); }
.hero__bar-dot.is-active { background: var(--blue); border-color: var(--blue); transform: scale(1.2); }

/* ============ Capability rail ============ */
.cap-rail { background: var(--steel-900); border-top: 1px solid rgba(255,255,255,0.06); border-bottom: 1px solid rgba(255,255,255,0.06); padding: 34px 0; }
.cap-rail__grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; text-align: center; }
.cap { display: flex; flex-direction: column; gap: 6px; align-items: center; }
.cap__num { font-family: var(--font-heading); color: var(--blue-glow); font-size: 2.6rem; line-height: 1; }
.cap__lbl { font-family: var(--font-mono); font-size: 0.68rem; letter-spacing: 0.16em; text-transform: uppercase; color: rgba(255,255,255,0.55); }

/* ============ Sections ============ */
.section { padding: 96px 0; }
.section--steel { background: var(--steel-900); }
.section--steel, .section--steel h2, .section--steel .section-head__note { color: #fff; }
.section--steel .section-head__label { color: var(--blue-glow); }
.section--steel .section-head__all { color: var(--blue-glow); }

.section-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 24px; margin-bottom: 48px; }
.section-head__label { display: block; font-family: var(--font-mono); font-size: 0.72rem; font-weight: 600; letter-spacing: 0.2em; text-transform: uppercase; color: var(--blue); margin-bottom: 14px; }
.section-head__title { font-size: clamp(1.8rem, 3.4vw, 2.7rem); }
.section-head__note { max-width: 330px; font-size: 0.98rem; color: var(--muted); }
.section--steel .section-head__note { color: rgba(255,255,255,0.6); }
.section-head__all { display: inline-flex; align-items: center; gap: 8px; font-family: var(--font-mono); font-size: 0.78rem; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; color: var(--blue); }
.section-head__all span { transition: transform 0.25s var(--ease); }
.section-head__all:hover span { transform: translateX(4px); }

/* ============ Category grid (indexed cards) ============ */
.cat-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.cat-card {
  position: relative; overflow: hidden; background: var(--steel-900); color: #fff;
  min-height: 320px; display: flex; flex-direction: column; justify-content: flex-end;
  clip-path: polygon(var(--cut) 0, 100% 0, 100% calc(100% - var(--cut)), calc(100% - var(--cut)) 100%, 0 100%, 0 var(--cut));
  transition: transform 0.32s var(--ease);
}
.cat-card:hover { transform: translateY(-6px); }
.cat-card__idx { position: absolute; top: 16px; left: 18px; z-index: 3; font-family: var(--font-mono); font-size: 0.74rem; letter-spacing: 0.12em; color: var(--blue-glow); }
.cat-card__img { position: absolute; inset: 0; background-size: cover; background-position: center; transition: transform 0.7s var(--ease), filter 0.4s ease; }
.cat-card:hover .cat-card__img { transform: scale(1.1); }
.cat-card::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, rgba(13,16,21,0.1) 0%, rgba(13,16,21,0.12) 45%, rgba(13,16,21,0.9) 100%); }
.cat-card__foot { position: relative; z-index: 2; padding: 20px 20px 24px; }
.cat-card__name { display: block; font-family: var(--font-heading); font-size: 1.3rem; text-transform: uppercase; }
.cat-card__code { display: block; font-family: var(--font-mono); font-size: 0.68rem; letter-spacing: 0.14em; color: rgba(255,255,255,0.55); margin-top: 6px; }
.cat-card__arrow { position: absolute; z-index: 2; right: 18px; bottom: 20px; font-family: var(--font-mono); color: var(--blue-glow); transform: translateX(0); transition: transform 0.3s var(--ease); }
.cat-card:hover .cat-card__arrow { transform: translateX(6px); }

/* ============ Product spec-sheet cards ============ */
.spec-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.spec-card {
  background: var(--steel-850); border: 1px solid rgba(255,255,255,0.08);
  clip-path: polygon(var(--cut) 0, 100% 0, 100% calc(100% - var(--cut)), calc(100% - var(--cut)) 100%, 0 100%, 0 var(--cut));
  overflow: hidden; color: #fff; transition: transform 0.3s var(--ease), border-color 0.3s ease;
}
.spec-card:hover { transform: translateY(-6px); border-color: rgba(47,123,255,0.5); }
.spec-card__head { display: flex; align-items: center; justify-content: space-between; padding: 14px 16px; border-bottom: 1px solid rgba(255,255,255,0.08); }
.spec-card__code { font-family: var(--font-mono); font-size: 0.66rem; letter-spacing: 0.08em; color: var(--blue-glow); }
.spec-card__badge { font-family: var(--font-mono); font-size: 0.6rem; letter-spacing: 0.12em; color: rgba(255,255,255,0.6); border: 1px solid rgba(255,255,255,0.2); padding: 4px 8px; clip-path: polygon(6px 0, 100% 0, 100% calc(100% - 6px), calc(100% - 6px) 100%, 0 100%, 0 6px); }
.spec-card__img { aspect-ratio: 4 / 3; background-size: cover; background-position: center; transition: transform 0.6s var(--ease), filter 0.4s ease; }
.spec-card:hover .spec-card__img { transform: scale(1.08); filter: brightness(1.05); }
.spec-card__body { padding: 18px 18px 22px; }
.spec-card__name { font-family: var(--font-heading); font-size: 1.12rem; text-transform: uppercase; margin-bottom: 10px; letter-spacing: 0.01em; }
.spec-card__meta { font-family: var(--font-mono); font-size: 0.74rem; color: rgba(255,255,255,0.55); line-height: 1.5; }
.spec-card__meta span { color: var(--blue-glow); font-weight: 600; }
.spec-card__link { display: inline-flex; align-items: center; gap: 8px; margin-top: 16px; font-family: var(--font-mono); font-size: 0.76rem; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; color: var(--blue-glow); }
.spec-card__link span { transition: transform 0.25s var(--ease); }
.spec-card__link:hover span { transform: translateX(4px); }

/* ============ About ============ */
.about { display: grid; grid-template-columns: 1fr 1.05fr; gap: 64px; align-items: center; }
.about__frame { position: relative; overflow: hidden; clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--cut-lg)), calc(100% - var(--cut-lg)) 100%, 0 100%); }
.about__frame img { width: 100%; aspect-ratio: 4 / 3.2; object-fit: cover; }
.about__media { position: relative; }
.about__coord { position: absolute; bottom: 14px; left: 0; right: 0; text-align: center; font-family: var(--font-mono); font-size: 0.66rem; letter-spacing: 0.16em; color: #fff; text-shadow: 0 1px 6px rgba(0,0,0,0.7); }
.about__title { font-size: clamp(2rem, 3.6vw, 2.9rem); margin-bottom: 18px; }
.about__lead { font-size: 1.24rem; color: var(--heading); font-weight: 700; margin-bottom: 16px; }
.about__text p { margin-bottom: 16px; }
.about__proof { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin: 26px 0 30px; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); padding: 20px 0; }
.about__proof b { font-family: var(--font-heading); font-size: 1.8rem; color: var(--blue); display: block; line-height: 1; }
.about__proof span { font-family: var(--font-mono); font-size: 0.68rem; letter-spacing: 0.06em; text-transform: uppercase; color: var(--muted); display: block; margin-top: 8px; }

/* ============ CTA band ============ */
.cta-band { background: var(--steel-900); background-image: radial-gradient(760px 320px at 50% -10%, rgba(47,123,255,0.24), transparent 65%); padding: 96px 0; text-align: center; }
.cta-band__inner { max-width: 720px; }
.cta-band__label { display: block; font-family: var(--font-mono); font-size: 0.72rem; font-weight: 600; letter-spacing: 0.22em; color: var(--blue-glow); margin-bottom: 16px; }
.cta-band__title { color: #fff; font-size: clamp(2rem, 4vw, 3rem); margin-bottom: 18px; }
.cta-band p { color: rgba(255,255,255,0.72); max-width: 540px; margin: 0 auto 30px; }

/* ============ Footer ============ */
.footer { background: var(--steel-950); color: rgba(255,255,255,0.6); font-size: 0.94rem; padding: 76px 0 24px; }
.footer__grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1.4fr; gap: 44px; padding-bottom: 46px; border-bottom: 1px solid rgba(255,255,255,0.08); }
.footer__brand img { max-height: 56px; margin-bottom: 16px; }
.footer__brand p { max-width: 300px; margin-bottom: 20px; }
.footer__social { display: flex; align-items: center; gap: 12px; }
.footer__social span { font-family: var(--font-mono); font-size: 0.66rem; letter-spacing: 0.16em; color: rgba(255,255,255,0.5); }
.footer__social-link { font-family: var(--font-mono); font-size: 0.7rem; border: 1px solid rgba(255,255,255,0.2); padding: 5px 9px; color: #fff; clip-path: polygon(6px 0, 100% 0, 100% calc(100% - 6px), calc(100% - 6px) 100%, 0 100%, 0 6px); transition: background 0.2s ease, border-color 0.2s ease; }
.footer__social-link:hover { background: var(--blue); border-color: var(--blue); }
.footer__title { display: block; font-family: var(--font-mono); font-size: 0.68rem; font-weight: 600; letter-spacing: 0.2em; color: var(--blue-glow); margin-bottom: 18px; }
.footer__link { display: block; padding: 6px 0; color: rgba(255,255,255,0.6); transition: color 0.15s ease, transform 0.15s ease; }
.footer__link:hover { color: #fff; transform: translateX(3px); }
.footer__col .btn { margin-top: 14px; }
.footer__bottom { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding-top: 24px; font-family: var(--font-mono); font-size: 0.7rem; letter-spacing: 0.06em; color: rgba(255,255,255,0.4); }
.footer__bottom-code { color: rgba(255,255,255,0.3); }

/* ============ Scroll reveal ============ */
.reveal { opacity: 0; transform: translateY(30px); transition: opacity 0.72s var(--ease), transform 0.72s var(--ease); }
.reveal.is-visible { opacity: 1; transform: none; }
.reveal--right { transform: translateX(40px); }
.reveal--right.is-visible { transform: none; }

/* ============ Responsive ============ */
@media (max-width: 1024px) {
  .spec-panel { display: none; }
  .hero { min-height: 600px; }
}
@media (max-width: 980px) {
  .cat-grid, .spec-grid { grid-template-columns: repeat(2, 1fr); }
  .footer__grid { grid-template-columns: 1fr 1fr; }
  .about { grid-template-columns: 1fr; gap: 40px; }
  .cap-rail__grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 760px) {
  .main-nav { display: none; }
  .header-side .btn { display: none; }
  .menu-btn { display: inline-flex; }
  .top-rail__mid { display: none; }
  .cat-grid, .spec-grid { grid-template-columns: 1fr; }
  .section { padding: 64px 0; }
  .footer__grid { grid-template-columns: 1fr; gap: 30px; }
  .section-head { flex-direction: column; align-items: flex-start; }
  .hero { min-height: 560px; }
  .about__proof { grid-template-columns: repeat(3, 1fr); gap: 12px; }
}