/* ════════════════════════════════════════════════════════════════════
   HEAVY STRUCTURAL HERO — cinematic industrial split (Heavy Structural
   page only). Deliberately mirrors ferro-hero.css / aluminium-hero.css
   component-for-component (label chip, eyebrow, heading, CTA row,
   feature row, floating quick-contact panel, full-bleed visual, double
   curve) so the three "Products" hero pages read as one family. Real
   photo (Hero/Heavy_Structural.png: towering structural steel frame,
   tower crane, orange sunset diagonal light, foreground H-beam stack)
   bleeds edge-to-edge on desktop behind a single scrim, weighted right
   so the left text column reads clean; on mobile it stays a full-bleed
   background behind the stacked text, matching the homepage /
   aluminium-foil / ferro-alloys / steel hero.
   ════════════════════════════════════════════════════════════════════ */

.hst-hero {
  --hst-navy-deep: #020B1C;
  --hst-navy: #071A3A;
  --hst-navy2: #0B2554;
  --hst-orange: #FF6A00;
  --hst-orange-hot: #FF8A00;
  --hst-white: #F5F7FA;
  --hst-gray: #C7D0DE;

  position: relative;
  overflow: hidden;
  padding: calc(var(--nav-h) + 2.5rem) 1.75rem 3.5rem;
  min-height: clamp(760px, 92vh, 900px);
  display: flex;
  align-items: center;
  background:
    radial-gradient(ellipse 60% 50% at 84% 20%, rgba(255, 106, 0, .16), transparent 62%),
    linear-gradient(150deg, var(--hst-navy-deep) 0%, var(--hst-navy) 55%, var(--hst-navy2) 100%);
  color: var(--hst-white);
}

/* ══ BACKGROUND LAYERS ══ */
.hst-bg { position: absolute; inset: 0; z-index: 2; pointer-events: none; }

.hst-particles { position: absolute; inset: 0; overflow: hidden; }
.hst-particle {
  position: absolute; bottom: -5%; left: var(--x, 70%);
  width: var(--size, 3px); height: var(--size, 3px); border-radius: 50%;
  background: var(--hue, var(--hst-orange-hot));
  box-shadow: 0 0 6px 1px var(--hue, rgba(255, 138, 0, .6));
  opacity: 0;
  animation: hstParticleFloat var(--dur, 16s) ease-in var(--delay, 0s) infinite;
}
@keyframes hstParticleFloat {
  0% { transform: translateY(0) translateX(0); opacity: 0; }
  12% { opacity: .75; }
  85% { opacity: .3; }
  100% { transform: translateY(-110vh) translateX(var(--drift, 16px)); opacity: 0; }
}

.hst-glow { position: absolute; border-radius: 50%; filter: blur(60px); pointer-events: none; }
.hst-glow-a { top: 4%; right: 6%; width: 32vw; height: 32vw; background: rgba(255, 106, 0, .18); animation: hstFlicker 6s ease-in-out infinite; }
.hst-glow-b { bottom: -8%; left: 14%; width: 26vw; height: 26vw; background: rgba(7, 26, 58, .6); }

@keyframes hstFlicker {
  0%, 100% { opacity: 1; }
  38% { opacity: .82; }
  52% { opacity: 1; }
  70% { opacity: .88; }
}

/* ══ LAYOUT ══ */
.hst-inner { position: relative; z-index: 5; width: 100%; max-width: 1400px; margin: 0 auto; }
.hst-content { min-width: 0; }
@media (min-width: 960px) { .hst-content { max-width: 47%; } }

/* ══ LABEL / EYEBROW ══ */
.hst-label {
  display: inline-flex; align-items: center; gap: .55rem;
  margin-bottom: .85rem;
}
.hst-label-icon {
  width: 20px; height: 20px; flex-shrink: 0;
  stroke: var(--hst-orange); fill: none; stroke-width: 1.6;
  filter: drop-shadow(0 0 5px rgba(255, 106, 0, .5));
}
.hst-label-text {
  font-family: var(--font-mono); font-size: .74rem; font-weight: 700;
  letter-spacing: .26em; text-transform: uppercase; color: var(--hst-orange-hot);
}

.hst-eyebrow { display: flex; align-items: center; gap: .65rem; margin-bottom: 1.1rem; }
.hst-eyebrow-text {
  font-family: var(--font-mono); font-size: .78rem; font-weight: 700;
  letter-spacing: .12em; text-transform: uppercase; color: var(--hst-gray);
}
.hst-eyebrow-rule { width: 28px; height: 2px; background: linear-gradient(90deg, var(--hst-orange), var(--hst-orange-hot)); border-radius: 2px; }

/* ══ HEADLINE ══ */
.hst-hero h1.hst-heading {
  text-transform: none; font-family: var(--font-display); font-weight: 800;
  font-size: clamp(2.15rem, 3.9vw, 3.35rem); line-height: 1.08; letter-spacing: -.01em;
  margin: 0 0 1.05rem;
}
.hst-line { display: block; overflow: hidden; padding-bottom: .08em; }
.hst-line-inner { display: block; color: var(--hst-white); }
.hst-line-inner.hst-accent { color: var(--hst-orange); }

.hst-desc {
  color: var(--hst-gray); font-size: clamp(.98rem, 1.05vw, 1.12rem); line-height: 1.65;
  max-width: 42ch; margin: 0 0 1.6rem; font-weight: 500;
  padding: .85rem 1.1rem;
  background: linear-gradient(135deg, rgba(7, 26, 58, .55), rgba(7, 26, 58, .24));
  backdrop-filter: blur(10px) saturate(140%); -webkit-backdrop-filter: blur(10px) saturate(140%);
  border: 1px solid rgba(255, 106, 31, .22); border-radius: 1rem;
  box-shadow: 0 8px 24px rgba(2, 8, 20, .32), inset 0 1px 0 rgba(255, 255, 255, .08);
}

/* ══ PRIMARY CTA ══ */
.hst-cta-row { display: flex; align-items: center; gap: .9rem; flex-wrap: wrap; }
.hst-cta {
  position: relative; display: inline-flex; align-items: center; gap: .95rem;
  padding: .28rem .28rem .28rem 1.5rem; border-radius: 3rem; text-decoration: none;
  background: linear-gradient(135deg, var(--hst-orange-hot), var(--hst-orange));
  border: 1px solid rgba(255, 255, 255, .12);
  box-shadow: 0 10px 28px rgba(255, 106, 0, .38), 0 0 0 1px rgba(255, 255, 255, .05) inset;
  transition: transform .3s cubic-bezier(.16, .84, .44, 1), box-shadow .3s ease, scale .3s cubic-bezier(.16, .84, .44, 1);
}
.hst-cta-label { font-family: var(--font-mono); font-size: .8rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; color: #fff; }
.hst-cta-arrow {
  display: flex; align-items: center; justify-content: center;
  width: 36px; height: 36px; border-radius: 50%;
  background: rgba(255, 255, 255, .18); color: #fff; flex-shrink: 0;
  transition: transform .3s cubic-bezier(.16, .84, .44, 1);
}
.hst-cta-arrow svg { width: 16px; height: 16px; }
.hst-cta:hover { transform: translateY(-2px) scale(1.02); box-shadow: 0 16px 36px rgba(255, 106, 0, .5), 0 0 0 1px rgba(255, 255, 255, .07) inset; }
.hst-cta:hover .hst-cta-arrow { transform: translateX(4px); }
.hst-cta:focus-visible { outline: 2px solid var(--hst-white); outline-offset: 3px; }

.hst-cta-secondary {
  display: inline-flex; align-items: center; justify-content: center;
  padding: .95rem 1.7rem; border-radius: 3rem; text-decoration: none;
  font-family: var(--font-mono); font-size: .8rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase;
  color: var(--hst-white); background: rgba(2, 11, 28, .55); border: 1.5px solid rgba(255, 255, 255, .14);
  transition: transform .3s cubic-bezier(.16, .84, .44, 1), box-shadow .3s ease, border-color .3s ease;
}
.hst-cta-secondary:hover { transform: translateY(-2px); border-color: var(--hst-orange); box-shadow: 0 0 16px rgba(255, 106, 0, .25); }
.hst-cta-secondary:focus-visible { outline: 2px solid var(--hst-white); outline-offset: 3px; }

/* ══ FEATURE ROW ══ */
.hst-features { display: flex; align-items: center; gap: .7rem; margin-top: 2.1rem; flex-wrap: wrap; }
.hst-feature {
  display: flex; align-items: center; gap: .7rem;
  padding: .55rem 1.15rem .55rem .55rem; min-width: 0;
  background: linear-gradient(135deg, rgba(7, 26, 58, .6), rgba(7, 26, 58, .32));
  backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 106, 0, .2); border-radius: 3rem;
  box-shadow: 0 6px 18px rgba(2, 11, 28, .28);
  transition: transform .32s cubic-bezier(.16, .84, .44, 1), border-color .32s ease, box-shadow .32s ease, background .32s ease;
}
.hst-feature:hover {
  transform: translateY(-3px);
  border-color: rgba(255, 106, 0, .55);
  background: linear-gradient(135deg, rgba(7, 26, 58, .78), rgba(7, 26, 58, .46));
  box-shadow: 0 12px 26px rgba(255, 106, 0, .18);
}
.hst-feature-icon {
  position: relative;
  display: flex; align-items: center; justify-content: center; flex-shrink: 0;
  width: 40px; height: 40px; border-radius: 50%;
  background: radial-gradient(circle at 35% 30%, rgba(255, 106, 0, .32), rgba(255, 106, 0, .08));
  border: 1.5px solid rgba(255, 106, 0, .55);
  box-shadow: 0 0 16px rgba(255, 106, 0, .22), inset 0 0 8px rgba(255, 106, 0, .14);
  transition: transform .35s cubic-bezier(.16, .84, .44, 1), box-shadow .35s ease;
}
.hst-feature:hover .hst-feature-icon {
  transform: scale(1.1) rotate(-6deg);
  box-shadow: 0 0 22px rgba(255, 106, 0, .4), inset 0 0 10px rgba(255, 106, 0, .2);
}
.hst-feature-icon svg { width: 19px; height: 19px; stroke: var(--hst-orange); fill: none; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }

/* ── idle "flex" pulse: a soft ring breathing outward behind each icon ── */
.hst-feature-icon::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 2px solid var(--hst-orange);
  box-shadow: 0 0 0 0 rgba(255, 106, 0, .5);
  opacity: 0;
  animation: hstIconFlex 2.6s cubic-bezier(.22, 1, .36, 1) infinite;
}
.hst-feature:nth-child(1) .hst-feature-icon::after { animation-delay: 0s; }
.hst-feature:nth-child(2) .hst-feature-icon::after { animation-delay: .65s; }
.hst-feature:nth-child(3) .hst-feature-icon::after { animation-delay: 1.3s; }
.hst-feature:nth-child(4) .hst-feature-icon::after { animation-delay: 1.95s; }

@keyframes hstIconFlex {
  0% { transform: scale(1); opacity: .9; }
  75% { transform: scale(1.7); opacity: 0; }
  100% { transform: scale(1.7); opacity: 0; }
}
.hst-feature h4 {
  text-transform: uppercase; font-family: var(--font-mono); font-size: .72rem; font-weight: 700;
  letter-spacing: .05em; color: var(--hst-white); margin: 0; white-space: nowrap;
}

/* ══ FLOATING QUICK-CONTACT PANEL ══ */
.hst-panel {
  margin-top: 1.7rem; padding: 1rem 1.1rem;
  background: rgba(7, 26, 58, .5); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 106, 0, .22); border-radius: 1.1rem;
  box-shadow: 0 18px 40px rgba(2, 11, 28, .4);
  display: flex; flex-direction: column; gap: .6rem;
}
.hst-panel-row { display: flex; gap: .6rem; flex-wrap: wrap; }
.hst-panel-row-2 { gap: .5rem; }

.hst-panel-btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .45rem;
  font-family: var(--font-mono); font-size: .7rem; font-weight: 700; letter-spacing: .04em;
  text-decoration: none; border-radius: 2rem; padding: .62rem 1rem;
  border: 1.5px solid transparent; white-space: nowrap;
  transition: transform .28s ease, box-shadow .28s ease, border-color .28s ease, background .28s ease;
}
.hst-panel-btn svg { width: 15px; height: 15px; flex-shrink: 0; transition: transform .28s ease; }

.hst-panel-row-2 .hst-panel-btn { flex: 1 1 auto; padding: .55rem .8rem; font-size: .68rem; }

.hst-panel-whatsapp { color: #fff; background: #25D366; }
.hst-panel-whatsapp:hover { box-shadow: 0 0 16px rgba(37, 211, 102, .5); }
.hst-panel-whatsapp:hover svg { transform: scale(1.12); }

.hst-panel-call { color: #fff; background: var(--hst-orange); }
.hst-panel-call:hover { background: var(--hst-orange-hot); box-shadow: 0 0 16px rgba(255, 106, 0, .4); }
.hst-panel-call:hover svg { transform: rotate(-8deg); }

.hst-panel-email { color: var(--hst-white); background: rgba(2, 11, 28, .55); border-color: rgba(255, 255, 255, .14); }
.hst-panel-email:hover { border-color: var(--hst-orange); box-shadow: 0 0 14px rgba(255, 106, 0, .22); }
.hst-panel-email:hover svg { transform: translateY(-2px); }

.hst-panel-book { color: var(--hst-white); background: rgba(2, 11, 28, .55); border-color: rgba(255, 255, 255, .14); }
.hst-panel-book:hover { border-color: var(--hst-orange); box-shadow: 0 0 14px rgba(255, 106, 0, .22); }
.hst-panel-book:hover svg { transform: rotate(-6deg); }

/* ══ HERO VISUAL: full-bleed photo + single scrim (one composition, no stacking) ══ */
.hst-visual { position: relative; overflow: hidden; margin: 0; }
.hst-visual-frame { position: absolute; inset: 0; transition: transform .4s ease-out; }
.hst-visual-frame img {
  display: block; width: 100%; height: 100%; object-fit: cover; object-position: 64% 40%;
  filter: saturate(1.04) contrast(1.03);
}
.hst-visual-scrim {
  position: absolute; inset: 0;
  background:
    linear-gradient(100deg, var(--hst-navy-deep) 0%, rgba(2, 11, 28, .94) 15%, rgba(7, 26, 58, .68) 30%, rgba(7, 26, 58, .26) 45%, transparent 60%),
    linear-gradient(180deg, rgba(2, 11, 28, .5) 0%, transparent 14%, transparent 80%, rgba(2, 11, 28, .55) 100%);
}
.hst-sweep {
  position: absolute; inset: 0; z-index: 2; pointer-events: none;
  background: linear-gradient(115deg, transparent 42%, rgba(255, 210, 160, .14) 49%, rgba(255, 210, 160, .24) 50%, rgba(255, 210, 160, .14) 51%, transparent 58%);
  background-size: 260% 260%; background-position: 120% 0%;
  animation: hstSweep 9s ease-in-out infinite; mix-blend-mode: screen;
}
@keyframes hstSweep { 0%, 100% { background-position: 120% 0%; } 50% { background-position: -20% 100%; } }

.hst-visual { position: absolute; inset: 0; z-index: 0; }

/* ══ DECORATIVE CURVES ══ */
.hst-curve-under {
  position: absolute; left: 0; right: 0; bottom: -1px; width: 100%;
  height: clamp(50px, 8vw, 96px); z-index: 3; pointer-events: none; opacity: .5;
}
.hst-curve-under path { fill: none; stroke: var(--hst-navy2); stroke-width: 10; }

.hst-curve {
  position: absolute; left: 0; right: 0; bottom: -1px; width: 100%;
  height: clamp(36px, 6vw, 70px); z-index: 4; pointer-events: none;
}
.hst-curve path { fill: none; stroke: var(--hst-orange); stroke-width: 2; filter: drop-shadow(0 0 8px rgba(255, 106, 0, .55)); }

/* ══ ENTRANCE (JS flips .hst-loaded on .hst-hero) ══ */
.hst-label, .hst-eyebrow, .hst-line-inner, .hst-desc, .hst-cta, .hst-cta-secondary, .hst-feature, .hst-panel {
  opacity: 0; transform: translateY(16px);
  transition: opacity .65s cubic-bezier(.22, 1, .36, 1), transform .65s cubic-bezier(.22, 1, .36, 1);
}
.hst-loaded .hst-label { opacity: 1; transform: none; transition-delay: .1s; }
.hst-loaded .hst-eyebrow { opacity: 1; transform: none; transition-delay: .18s; }
.hst-loaded .hst-line:nth-child(1) .hst-line-inner { opacity: 1; transform: none; transition-delay: .28s; }
.hst-loaded .hst-line:nth-child(2) .hst-line-inner { opacity: 1; transform: none; transition-delay: .38s; }
.hst-loaded .hst-desc { opacity: 1; transform: none; transition-delay: .48s; }
.hst-loaded .hst-cta { opacity: 1; transform: none; transition-delay: .6s; }
.hst-loaded .hst-cta-secondary { opacity: 1; transform: none; transition-delay: .66s; }
.hst-loaded .hst-feature:nth-child(1) { opacity: 1; transform: none; transition-delay: .72s; }
.hst-loaded .hst-feature:nth-child(2) { opacity: 1; transform: none; transition-delay: .8s; }
.hst-loaded .hst-feature:nth-child(3) { opacity: 1; transform: none; transition-delay: .88s; }
.hst-loaded .hst-feature:nth-child(4) { opacity: 1; transform: none; transition-delay: .96s; }
.hst-loaded .hst-panel { opacity: 1; transform: none; transition-delay: 1.08s; }

.hst-visual { opacity: 0; transform: translateX(18px) scale(1.03); transition: opacity 1.6s cubic-bezier(.22, 1, .36, 1), transform 1.6s cubic-bezier(.22, 1, .36, 1); }
.hst-loaded .hst-visual { opacity: 1; transform: none; }

.hst-bg, .hst-visual-frame, .hst-curve { transition: transform .4s ease-out; will-change: transform; }

/* ══ TABLET / MOBILE: .hst-visual flows in normal document order after
   .hst-inner once it drops out of absolute full-bleed mode ══ */
@media (max-width: 959px) {
  /* text and features stack centered over the same full-bleed photo, no
     separate boxed card — matches the homepage / leadership hero */
  .hst-hero { display: block; padding: calc(var(--nav-h) + 2rem) 1.5rem 3.25rem; min-height: auto; text-align: center; }
  .hst-content { max-width: none; }

  .hst-label { justify-content: center; }
  .hst-eyebrow { justify-content: center; }
  .hst-desc { margin-left: auto; margin-right: auto; }
  .hst-cta-row { justify-content: center; }
  .hst-features { justify-content: center; }

  .hst-visual-frame img { object-position: 64% 30%; }
  .hst-visual-scrim {
    background:
      linear-gradient(180deg, rgba(2, 11, 28, .74) 0%, rgba(2, 11, 28, .38) 20%, rgba(7, 26, 58, .3) 38%, rgba(7, 26, 58, .6) 60%, rgba(2, 11, 28, .92) 78%, var(--hst-navy-deep) 96%),
      linear-gradient(90deg, rgba(2, 11, 28, .46) 0%, transparent 45%, transparent 60%, rgba(2, 11, 28, .3) 100%);
  }

  .hst-features { gap: .6rem; }
  .hst-feature h4 { font-size: .68rem; }
}

@media (max-width: 640px) {
  .hst-hero { padding: calc(var(--nav-h) + 1.6rem) 1.15rem 3rem; }
  .hst-hero h1.hst-heading { font-size: clamp(1.95rem, 8.5vw, 2.5rem); }

  .hst-label { margin-bottom: .7rem; }
  .hst-eyebrow { margin-bottom: .9rem; }
  .hst-desc { margin-bottom: 1.4rem; max-width: none; }
  .hst-cta { margin-bottom: 0; }

  .hst-cta-row { flex-direction: column; align-items: stretch; }
  .hst-cta, .hst-cta-secondary { width: 100%; }
  .hst-cta-label { flex: 1; text-align: center; }

  .hst-features { gap: .55rem; margin-top: 1.6rem; }
  .hst-feature { padding: .5rem 1rem .5rem .5rem; }
  .hst-feature-icon { width: 36px; height: 36px; }

  .hst-panel { margin-top: 1.5rem; }
  /* minmax(0,1fr): plain 1fr tracks won't shrink below a nowrap button's
     content width (e.g. "Book a Meeting"), so at ~320-360px the track —
     and with it the whole panel — gets pushed wider than the hero, which
     clips against .hst-hero's overflow:hidden. Letting the label wrap
     keeps the button inside its track instead. */
  .hst-panel-row-2 { display: grid; grid-template-columns: minmax(0,1fr) minmax(0,1fr); gap: .5rem; }
  .hst-panel-row-2 .hst-panel-btn { width: 100%; white-space: normal; text-align: center; line-height: 1.25; }

  .hst-visual-frame img { object-position: 70% 28%; }
}

/* ══ ACCESSIBILITY: reduced motion ══ */
@media (prefers-reduced-motion: reduce) {
  .hst-label, .hst-eyebrow, .hst-line-inner, .hst-desc, .hst-cta, .hst-cta-secondary, .hst-feature, .hst-panel, .hst-visual {
    transition: opacity .4s ease !important; transform: none !important;
  }
  .hst-feature-icon::after { animation: none !important; display: none; }
  .hst-sweep, .hst-particle, .hst-glow-a { animation: none !important; }
  .hst-bg, .hst-visual-frame, .hst-curve { transition: none !important; }
}

/* ══ LOW-END MOBILE: decorative background-position sweep/drift forces a
   repaint every frame and (where paired) costs extra compositing via
   mix-blend-mode; simplify it away below the tablet breakpoint regardless
   of the user's reduced-motion preference, since most low-end-phone users
   won't have that OS setting enabled ══ */
@media (max-width: 760px) {
  .hst-sweep { animation: none !important; mix-blend-mode: normal; }
}

/* ══ LOW-POWER MODE: same sweep simplification as the mobile breakpoint
   above, keyed off device capability (.low-power-mode) instead of
   viewport width ══ */
.low-power-mode .hst-sweep { animation: none !important; mix-blend-mode: normal; }