/* ===== DESIGN SYSTEM ===== */
:root {
  --bg:       #050508;
  --bg-card:  #0c0c12;
  --bg-card2: #111119;
  --surface:  #16161e;
  --border:   rgba(255,255,255,.06);
  --border-h: rgba(255,255,255,.12);
  --text:     #f5f5f7;
  --text-2:   rgba(245,245,247,.6);
  --text-3:   rgba(245,245,247,.35);
  --blue:     #2997ff;
  --teal:     #30d5c8;
  --green:    #30d158;
  --orange:   #ff9500;
  --red:      #ff453a;
  --radius:   16px;
  --radius-sm:10px;
  --radius-xs: 6px;
  --ease:     cubic-bezier(.25,.46,.45,.94);
  --ease-out: cubic-bezier(.16,1,.3,1);
  --nav-h:    64px;
  --section-pad: clamp(80px, 10vw, 140px);
}

/* ===== RESET ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
img { max-width: 100%; display: block; }
button { background: none; border: none; color: inherit; cursor: pointer; font: inherit; }

/* ===== UTILITY ===== */
.container { max-width: 1200px; margin: 0 auto; padding: 0 clamp(20px, 4vw, 40px); }
.gradient-text {
  background: linear-gradient(135deg, var(--blue), var(--teal));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.display-xl {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -.03em;
  margin-bottom: 1.5rem;
}
.display-lg {
  font-size: clamp(1.6rem, 3.5vw, 2.5rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -.02em;
  margin-bottom: 1rem;
}
.display-sm {
  font-size: clamp(1.2rem, 2.5vw, 1.6rem);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -.01em;
  margin-bottom: 1rem;
}
.zero { font-weight: 700; color: var(--text); }
.pfas { font-weight: 700; color: var(--blue); }

/* ===== NAVBAR ===== */
.navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  height: var(--nav-h);
  -webkit-backdrop-filter: blur(20px);
  backdrop-filter: blur(20px);
  background: rgba(5,5,8,.7);
  border-bottom: 1px solid transparent;
  transition: background .4s, border-color .4s;
}
.navbar.scrolled {
  background: rgba(5,5,8,.92);
  border-bottom-color: var(--border);
}
.navbar__inner {
  max-width: 1200px; margin: 0 auto;
  padding: 0 clamp(20px, 4vw, 40px);
  height: 100%; display: flex; align-items: center; gap: 2rem;
}
.navbar__logo {
  display: flex; align-items: center; gap: .5rem;
  font-size: .95rem;
}
.navbar__logo-icon { color: var(--blue); }
.navbar__links {
  display: flex; gap: 1.5rem; margin-left: auto;
}
.navbar__links a {
  font-size: .82rem; font-weight: 500;
  color: var(--text-2);
  padding: .25rem 0;
  position: relative;
  transition: color .3s;
}
.navbar__links a:hover { color: var(--text); }
.navbar__links a::after {
  content: ''; position: absolute; bottom: -2px; left: 0;
  width: 0; height: 1px; background: var(--blue);
  transition: width .3s var(--ease);
}
.navbar__links a:hover::after { width: 100%; }
.navbar__cta {
  font-size: .78rem; font-weight: 600;
  padding: .5rem 1.2rem;
  border-radius: 100px;
  background: var(--blue);
  color: #fff;
  transition: opacity .3s;
  white-space: nowrap;
}
.navbar__cta:hover { opacity: .85; }
.navbar__toggle { display: none; padding: .5rem; }

/* ===== HERO — Full viewport immersive ===== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.hero__bg {
  position: absolute; inset: 0; z-index: 0;
  background:
    radial-gradient(ellipse 70% 60% at 50% 40%, rgba(41,151,255,.08) 0%, transparent 60%),
    radial-gradient(ellipse 50% 40% at 30% 60%, rgba(48,213,200,.05) 0%, transparent 50%),
    radial-gradient(ellipse 40% 50% at 70% 70%, rgba(255,149,0,.04) 0%, transparent 50%);
  pointer-events: none;
}
/* Animated gradient orbs in hero background */
.hero__orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: .12;
  pointer-events: none;
  z-index: 0;
  animation: heroOrbFloat 8s ease-in-out infinite;
}
.hero__orb--1 {
  width: 500px; height: 500px;
  background: var(--blue);
  top: 10%; left: 15%;
  animation-delay: 0s;
}
.hero__orb--2 {
  width: 400px; height: 400px;
  background: var(--teal);
  bottom: 15%; right: 10%;
  animation-delay: -3s;
  opacity: .08;
}
.hero__orb--3 {
  width: 300px; height: 300px;
  background: var(--orange);
  top: 50%; left: 55%;
  animation-delay: -5s;
  opacity: .06;
}

/* ===== 3D SCENE SHOWCASE (in Solution section) ===== */
.scene-showcase {
  position: relative;
  width: calc(100% - clamp(40px, 8vw, 80px));
  max-width: 1200px;
  margin: 2rem auto;
  height: 460px;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border-h);
  background: #060610;
  box-shadow: 0 20px 60px rgba(0,0,0,.4), inset 0 0 80px rgba(0,0,0,.3);
}
.scene-showcase::after {
  content: '';
  position: absolute; inset: 0;
  border-radius: var(--radius);
  background: radial-gradient(ellipse 80% 80% at 50% 50%, transparent 50%, rgba(5,5,8,.5));
  pointer-events: none;
  z-index: 1;
}
.scene-showcase canvas {
  display: block;
  width: 100%;
  height: 100%;
}
/* Scene legend bar */
.scene-legend {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0;
  flex-wrap: wrap;
  width: calc(100% - clamp(40px, 8vw, 80px));
  max-width: 1200px;
  margin: 1rem auto 0;
  padding: 0;
  background: rgba(255,255,255,.02);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
}
.scene-legend__item {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: .6rem;
  flex: 1;
  min-width: 140px;
  padding: 1rem 1.2rem;
  font-size: .78rem;
  color: var(--text-2);
  font-weight: 500;
  position: relative;
  transition: color .3s, background .3s;
}
.scene-legend__item:hover {
  background: rgba(255,255,255,.03);
  color: var(--text);
}
.scene-legend__item + .scene-legend__item::before {
  content: '';
  position: absolute;
  left: 0; top: 20%; bottom: 20%;
  width: 1px;
  background: var(--border);
}
.scene-legend__item--core {
  color: var(--orange);
  font-weight: 600;
  flex: 1.5;
}
.scene-legend__item--core:hover {
  color: var(--orange);
  background: rgba(255,149,0,.04);
}
.scene-legend__dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}
.scene-legend__dot--blue   { background: var(--blue); box-shadow: 0 0 6px var(--blue); }
.scene-legend__dot--teal   { background: var(--teal); box-shadow: 0 0 6px var(--teal); }
.scene-legend__dot--orange { background: var(--orange); box-shadow: 0 0 8px rgba(255,149,0,.6); }
.scene-legend__dot--green  { background: var(--green); box-shadow: 0 0 6px var(--green); }

/* Legend step number */
.scene-legend__num {
  font-size: .6rem;
  font-weight: 700;
  color: var(--text-3);
  letter-spacing: .05em;
  font-variant-numeric: tabular-nums;
}

.hero__content {
  position: relative; z-index: 1;
  text-align: center;
  max-width: 740px;
  padding: calc(var(--nav-h) + 60px) 24px 2rem;
}
.hero__badge {
  display: inline-flex; align-items: center; gap: .5rem;
  font-size: .75rem; font-weight: 500;
  color: var(--text-2);
  padding: .4rem 1rem;
  border-radius: 100px;
  border: 1px solid var(--border);
  background: rgba(255,255,255,.03);
  margin-bottom: 1.5rem;
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
}
.hero__badge-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--green);
  animation: pulse 2s infinite;
}
.hero__title {
  font-size: clamp(2.5rem, 7vw, 5rem);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -.04em;
}
.hero__title-line { display: block; }
.hero__sub {
  font-size: clamp(.95rem, 1.5vw, 1.15rem);
  color: var(--text-2);
  max-width: 560px;
  margin: 1.25rem auto 2rem;
  line-height: 1.65;
  font-weight: 400;
}
.hero__actions {
  display: flex; gap: .75rem;
  justify-content: center;
  flex-wrap: wrap;
}
.btn {
  display: inline-flex; align-items: center; gap: .5rem;
  font-size: .88rem; font-weight: 600;
  padding: .75rem 1.8rem;
  border-radius: 100px;
  transition: all .3s var(--ease);
}
.btn--primary {
  background: var(--blue); color: #fff;
}
.btn--primary:hover {
  background: #1a8aef;
  transform: translateY(-1px);
  box-shadow: 0 8px 30px rgba(41,151,255,.3);
}
.btn--glass {
  background: rgba(255,255,255,.06);
  border: 1px solid var(--border-h);
  color: var(--text);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
}
.btn--glass:hover {
  background: rgba(255,255,255,.1);
  border-color: rgba(255,255,255,.2);
}

/* Hero scroll indicator */
.hero__scroll {
  position: relative; z-index: 1;
  margin-top: auto;
  margin-bottom: 2rem;
}
.hero__scroll-line {
  width: 1px; height: 48px;
  background: var(--border-h);
  position: relative;
  overflow: hidden;
}
.hero__scroll-line::after {
  content: '';
  position: absolute; top: -100%; left: 0;
  width: 100%; height: 50%;
  background: var(--blue);
  animation: scrollLineAnim 2s infinite;
}

/* ===== GLOW SEPARATOR ===== */
.glow-separator {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--blue), transparent);
  opacity: .4;
  position: relative;
}
.glow-separator::after {
  content: '';
  position: absolute;
  inset: -8px 20% -8px 20%;
  background: linear-gradient(90deg, transparent, var(--blue), transparent);
  filter: blur(12px);
  opacity: .3;
}
.glow-separator--teal {
  background: linear-gradient(90deg, transparent, var(--teal), transparent);
}
.glow-separator--teal::after {
  background: linear-gradient(90deg, transparent, var(--teal), transparent);
}

/* ===== SECTIONS ===== */
.section {
  padding: var(--section-pad) 0;
  position: relative;
}
.section--dark {
  background: var(--bg-card);
  position: relative;
}
.section--dark::before {
  content: '';
  position: absolute; inset: 0;
  background: radial-gradient(ellipse 50% 50% at 50% 0%, rgba(41,151,255,.04), transparent);
  pointer-events: none;
}

/* Section label */
.section-label {
  display: flex; align-items: center; gap: 1rem;
  margin-bottom: 2.5rem;
}
.section-label__num {
  font-size: .75rem; font-weight: 700;
  color: var(--blue);
  font-variant-numeric: tabular-nums;
}
.section-label__line {
  width: 40px; height: 1px;
  background: linear-gradient(90deg, var(--blue), transparent);
}
.section-label__text {
  font-size: .75rem; font-weight: 500;
  color: var(--text-3);
  text-transform: uppercase;
  letter-spacing: .1em;
}

/* ===== ABOUT ===== */
.about-hero { max-width: 700px; margin-bottom: 1rem; }
.about-intro {
  max-width: 640px;
  margin-bottom: 3rem;
}
.about-intro p {
  font-size: clamp(.92rem, 1.2vw, 1.05rem);
  color: var(--text-2);
  line-height: 1.7;
}

/* Data cards */
.data-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.25rem;
  margin-bottom: 2rem;
}
.data-card {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem 1.5rem;
  text-align: center;
  overflow: hidden;
  transition: border-color .4s, transform .4s var(--ease);
}
.data-card:hover {
  border-color: var(--border-h);
  transform: translateY(-4px);
}
.data-card__glow {
  position: absolute;
  top: 0; left: 50%; transform: translateX(-50%);
  width: 120px; height: 2px;
  border-radius: 2px;
  transition: width .4s, opacity .4s;
}
.data-card:hover .data-card__glow {
  width: 80%;
  opacity: 1;
}
.data-card__glow--blue { background: var(--blue); box-shadow: 0 0 20px var(--blue); }
.data-card__glow--teal { background: var(--teal); box-shadow: 0 0 20px var(--teal); }
.data-card__glow--orange { background: var(--orange); box-shadow: 0 0 20px var(--orange); }
.data-card__glow--red { background: var(--red); box-shadow: 0 0 20px var(--red); }

.data-card__value {
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: -.02em;
  margin-bottom: .25rem;
  background: linear-gradient(135deg, var(--text), rgba(255,255,255,.7));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.data-card__label {
  font-size: .78rem;
  color: var(--text-3);
  font-weight: 500;
}
.data-card__icon {
  position: absolute;
  bottom: 1rem; right: 1rem;
  color: rgba(255,255,255,.06);
  transition: color .4s;
}
.data-card:hover .data-card__icon {
  color: rgba(255,255,255,.12);
}

/* C-F Bond visual — Realistic molecular model */
.bond-visual {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.8rem;
  margin-top: 3rem;
  padding: 3rem 2rem;
  background: rgba(255,255,255,.02);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  position: relative;
}
.bond-visual__molecule {
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  gap: 0;
}

/* Atom sphere — 3D ball style with specular highlight */
.bond-visual__atom {
  position: relative;
  width: 90px; height: 90px;
  border-radius: 50%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 2;
  flex-shrink: 0;
}
.bond-visual__atom--c {
  background:
    radial-gradient(circle at 36% 32%, rgba(255,255,255,.18) 0%, transparent 50%),
    radial-gradient(circle at 50% 50%, #333 0%, #1a1a1a 60%, #0d0d0d 100%);
  box-shadow:
    inset 0 -8px 18px rgba(0,0,0,.6),
    0 0 20px rgba(41,151,255,.12),
    0 0 40px rgba(41,151,255,.05);
}
.bond-visual__atom--f {
  background:
    radial-gradient(circle at 36% 32%, rgba(255,255,255,.22) 0%, transparent 50%),
    radial-gradient(circle at 50% 50%, #1cb5a5 0%, #0e8a7c 55%, #065e54 100%);
  box-shadow:
    inset 0 -8px 18px rgba(0,0,0,.5),
    0 0 20px rgba(48,213,200,.15),
    0 0 40px rgba(48,213,200,.06);
}

/* Electron cloud — fuzzy halo around each atom */
.bond-visual__cloud {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  pointer-events: none;
  animation: cloudPulse 3s ease-in-out infinite;
}
.bond-visual__cloud--c {
  width: 130px; height: 130px;
  background: radial-gradient(circle, rgba(41,151,255,.1) 0%, rgba(41,151,255,.03) 45%, transparent 70%);
}
.bond-visual__cloud--f {
  width: 125px; height: 125px;
  background: radial-gradient(circle, rgba(48,213,200,.12) 0%, rgba(48,213,200,.03) 45%, transparent 70%);
}
@keyframes cloudPulse {
  0%, 100% { transform: translate(-50%, -50%) scale(1); opacity: 1; }
  50%      { transform: translate(-50%, -50%) scale(1.1); opacity: .7; }
}

/* Atom symbol & atomic number */
.bond-visual__symbol {
  font-size: 1.6rem;
  font-weight: 800;
  color: #fff;
  z-index: 1;
  text-shadow: 0 2px 8px rgba(0,0,0,.5);
  line-height: 1;
}
.bond-visual__number {
  font-size: .55rem;
  font-weight: 600;
  color: rgba(255,255,255,.4);
  z-index: 1;
  margin-top: 2px;
}

/* Sigma bond — triple bar (covalent bond representation) */
.bond-visual__bond {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 100px;
  position: relative;
  z-index: 3;
  gap: 3px;
  margin: 0 -8px;
}
.bond-visual__bond-bar {
  width: 100%;
  height: 3px;
  border-radius: 2px;
  background: linear-gradient(90deg,
    rgba(41,151,255,.6) 0%,
    rgba(100,200,220,.9) 50%,
    rgba(48,213,200,.6) 100%);
  position: relative;
  overflow: hidden;
}
.bond-visual__bond-bar::after {
  content: '';
  position: absolute;
  top: 0; left: -100%;
  width: 50%; height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,.5), transparent);
  animation: shimmer 2.5s infinite;
}
.bond-visual__bond-bar:nth-child(2)::after { animation-delay: .4s; }
.bond-visual__bond-bar:nth-child(3)::after { animation-delay: .8s; }

/* Electron density overlap cloud between atoms */
.bond-visual__overlap {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 120px; height: 50px;
  border-radius: 50%;
  background: radial-gradient(ellipse, rgba(100,210,220,.08) 0%, transparent 70%);
  pointer-events: none;
}

/* Shared electron pair dots */
.bond-visual__electrons {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 28px; height: 12px;
}
.bond-visual__e {
  position: absolute;
  width: 5px; height: 5px;
  border-radius: 50%;
  background: rgba(255,255,255,.7);
  box-shadow: 0 0 6px rgba(255,255,255,.5);
  animation: electronOscillate 1.8s ease-in-out infinite;
}
.bond-visual__e--1 { left: 0; top: 50%; transform: translateY(-50%); }
.bond-visual__e--2 { right: 0; top: 50%; transform: translateY(-50%); animation-delay: .9s; }
@keyframes electronOscillate {
  0%, 100% { opacity: .9; transform: translateY(-50%) scale(1); }
  50%      { opacity: .5; transform: translateY(-50%) scale(.7); }
}

/* Energy label */
.bond-visual__energy {
  position: absolute;
  bottom: -22px; left: 50%;
  transform: translateX(-50%);
  font-size: .68rem;
  font-weight: 700;
  color: var(--orange);
  white-space: nowrap;
  letter-spacing: .03em;
}

.bond-visual__caption {
  font-size: .82rem;
  color: var(--text-3);
  text-align: center;
  max-width: 420px;
  line-height: 1.6;
}

/* Comparative BDE scale */
.bond-visual__scale {
  display: flex;
  flex-direction: column;
  gap: 6px;
  width: 100%;
  max-width: 300px;
}
.bond-visual__scale-row {
  display: flex;
  align-items: center;
  gap: 8px;
}
.bond-visual__scale-row--highlight .bond-visual__scale-label {
  color: var(--orange);
  font-weight: 700;
}
.bond-visual__scale-row--highlight .bond-visual__scale-val {
  color: var(--orange);
  font-weight: 700;
}
.bond-visual__scale-label {
  font-size: .65rem;
  font-weight: 600;
  color: var(--text-3);
  width: 28px;
  text-align: right;
  flex-shrink: 0;
  font-variant-numeric: tabular-nums;
}
.bond-visual__scale-bar {
  flex: 1;
  height: 4px;
  border-radius: 2px;
  background: rgba(255,255,255,.04);
  overflow: hidden;
}
.bond-visual__scale-fill {
  height: 100%;
  border-radius: 2px;
  transition: width 1.5s var(--ease-out);
}
.bond-visual__scale-fill--ch { background: rgba(255,255,255,.15); width: 85%; }
.bond-visual__scale-fill--cc { background: rgba(255,255,255,.12); width: 71%; }
.bond-visual__scale-fill--co { background: rgba(255,255,255,.13); width: 74%; }
.bond-visual__scale-fill--cf {
  background: linear-gradient(90deg, var(--orange), #ffcc33);
  box-shadow: 0 0 8px rgba(255,149,0,.3);
  width: 100%;
}
.bond-visual__scale-val {
  font-size: .6rem;
  font-weight: 500;
  color: var(--text-3);
  width: 28px;
  font-variant-numeric: tabular-nums;
}

/* ===== PROBLEM ===== */
.problem-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.25rem;
  margin-top: 2.5rem;
}
.problem-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem 1.5rem;
  position: relative;
  overflow: hidden;
  transition: border-color .4s, transform .4s var(--ease);
}
.problem-card:hover {
  border-color: var(--border-h);
  transform: translateY(-4px);
}
.problem-card--accent {
  border-color: rgba(255,149,0,.2);
}
.problem-card--accent:hover {
  border-color: rgba(255,149,0,.4);
}
.problem-card__visual {
  position: relative;
  width: 48px; height: 48px;
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 1.2rem;
}
.problem-card__ring {
  position: absolute; inset: -6px;
  border-radius: 50%;
  border: 1px solid rgba(41,151,255,.2);
}
.problem-card__ring--pulse {
  animation: ringPulse 3s infinite;
}
.problem-card__num {
  font-size: .85rem;
  font-weight: 700;
  color: var(--blue);
}
.problem-card__title {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: .6rem;
}
.problem-card__text {
  font-size: .82rem;
  color: var(--text-2);
  line-height: 1.6;
  margin-bottom: 1rem;
}
.problem-card__stat {
  display: flex;
  align-items: baseline;
  gap: .4rem;
  padding-top: .8rem;
  border-top: 1px solid var(--border);
}
.problem-card__stat-value {
  font-size: 1.3rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--text), var(--blue));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.problem-card__stat-unit {
  font-size: .7rem;
  color: var(--text-3);
  text-transform: uppercase;
  letter-spacing: .05em;
}

/* ===== TECHNOLOGY ===== */
.tech-duo {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin-top: 2.5rem;
}
.tech-panel {
  position: relative;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2.5rem 2rem;
  overflow: hidden;
  transition: border-color .4s, transform .4s var(--ease);
}
.tech-panel:hover {
  border-color: var(--border-h);
  transform: translateY(-4px);
}
.tech-panel__glow {
  position: absolute;
  top: -1px; left: 50%; transform: translateX(-50%);
  width: 100px; height: 2px;
  border-radius: 2px;
  transition: width .5s;
}
.tech-panel:hover .tech-panel__glow { width: 60%; }
.tech-panel__glow--blue { background: var(--blue); box-shadow: 0 0 20px var(--blue); }
.tech-panel__glow--teal { background: var(--teal); box-shadow: 0 0 20px var(--teal); }

.tech-panel__badge {
  display: inline-flex; align-items: center; gap: .4rem;
  font-size: .7rem; font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .08em;
  padding: .3rem .8rem;
  border-radius: 100px;
  margin-bottom: 1.2rem;
}
.tech-panel__badge--industrial {
  color: var(--blue);
  background: rgba(41,151,255,.1);
  border: 1px solid rgba(41,151,255,.15);
}
.tech-panel__badge--pou {
  color: var(--teal);
  background: rgba(48,213,200,.1);
  border: 1px solid rgba(48,213,200,.15);
}
.tech-panel__title {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 1.2rem;
}
.tech-panel__list {
  display: flex;
  flex-direction: column;
  gap: .7rem;
}
.tech-panel__list li {
  position: relative;
  font-size: .85rem;
  color: var(--text-2);
  padding-left: 1.2rem;
  line-height: 1.5;
}
.tech-panel__list li::before {
  content: '';
  position: absolute;
  left: 0; top: .55em;
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--blue);
}
.tech-panel:nth-child(2) .tech-panel__list li::before {
  background: var(--teal);
}

/* ===== VERIFICATION ===== */
.verify-trio {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-top: 2.5rem;
}
.verify-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem 1.5rem;
  text-align: center;
  transition: border-color .4s, transform .4s var(--ease);
}
.verify-card:hover {
  border-color: var(--border-h);
  transform: translateY(-4px);
}
.verify-card__icon-wrap {
  position: relative;
  width: 56px; height: 56px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 1.2rem;
}
.verify-card__icon-wrap--1 {
  background: rgba(41,151,255,.1);
  color: var(--blue);
}
.verify-card__icon-wrap--2 {
  background: rgba(48,213,200,.1);
  color: var(--teal);
}
.verify-card__icon-wrap--3 {
  background: rgba(48,209,88,.1);
  color: var(--green);
}
.verify-card__ring {
  position: absolute; inset: -8px;
  border-radius: 50%;
  border: 1px solid rgba(255,255,255,.06);
  animation: ringPulse 4s infinite;
}
.verify-card__title {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: .4rem;
}
.verify-card__desc {
  font-size: .82rem;
  color: var(--text-2);
  margin-bottom: .8rem;
}
.verify-card__tag {
  display: inline-block;
  font-size: .65rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--teal);
  background: rgba(48,213,200,.08);
  border: 1px solid rgba(48,213,200,.12);
  border-radius: 100px;
  padding: .2rem .8rem;
}

/* ===== INNOVATION + REGULATION ===== */
.split-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  margin-top: 2.5rem;
}
.pillar-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: .8rem;
  margin-top: 1.5rem;
}
.pillar {
  display: flex;
  align-items: center;
  gap: .75rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 1rem 1.2rem;
  font-size: .85rem;
  font-weight: 500;
  color: var(--text-2);
  transition: border-color .3s, transform .3s;
}
.pillar:hover {
  border-color: var(--border-h);
  transform: translateY(-2px);
}
.pillar__icon {
  width: 36px; height: 36px;
  border-radius: 8px;
  background: rgba(41,151,255,.08);
  display: flex; align-items: center; justify-content: center;
  color: var(--blue);
  flex-shrink: 0;
}

/* Regulation cards */
.reg-cards {
  display: flex;
  flex-direction: column;
  gap: .75rem;
}
.reg-card {
  display: flex;
  align-items: center;
  gap: 1rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 1rem 1.2rem;
  transition: border-color .3s, transform .3s;
}
.reg-card:hover {
  border-color: var(--border-h);
  transform: translateX(4px);
}
.reg-card__flag {
  width: 36px; height: 36px;
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  font-size: .7rem;
  font-weight: 800;
  flex-shrink: 0;
}
.reg-card__flag--us {
  background: rgba(41,151,255,.1);
  color: var(--blue);
}
.reg-card__flag--eu {
  background: rgba(48,213,200,.1);
  color: var(--teal);
}
.reg-card__body strong {
  font-size: .82rem;
  font-weight: 600;
  display: block;
}
.reg-card__value {
  font-size: 1.1rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--text), var(--blue));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin: .15rem 0;
}
.reg-card__date {
  font-size: .7rem;
  color: var(--text-3);
}

/* ===== PRODUCT HERO — 3D Device Section ===== */
.product-hero-section {
  position: relative;
  overflow: hidden;
}
.product-hero-section__bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 50% at 70% 50%, rgba(41,151,255,.04) 0%, transparent 70%),
    radial-gradient(ellipse 40% 60% at 30% 60%, rgba(48,213,200,.03) 0%, transparent 70%);
  pointer-events: none;
}

.product-hero {
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  gap: clamp(2rem, 4vw, 4rem);
  align-items: center;
  min-height: 600px;
}

/* Left: text */
.product-hero__text {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}
.product-hero__desc {
  font-size: clamp(.92rem, 1.2vw, 1.05rem);
  color: var(--text-2);
  line-height: 1.7;
  max-width: 480px;
}
.product-hero__specs {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-top: .5rem;
}
.product-spec {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 1rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  transition: border-color .3s, transform .3s var(--ease);
}
.product-spec:hover {
  border-color: var(--border-h);
  transform: translateY(-2px);
}
.product-spec__val {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text);
  line-height: 1;
}
.product-spec__unit {
  font-size: .72rem;
  font-weight: 600;
  color: var(--teal);
  text-transform: uppercase;
  letter-spacing: .06em;
}
.product-spec__label {
  font-size: .7rem;
  color: var(--text-3);
  margin-top: 2px;
}
.product-hero__cta {
  align-self: flex-start;
  margin-top: .5rem;
}

/* Right: 3D visual */
.product-hero__visual {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}
.product-hero__canvas-wrap {
  position: relative;
  width: 100%;
  aspect-ratio: 1 / 1;
  max-height: 640px;
  border-radius: var(--radius);
  overflow: hidden;
}
#productCanvas {
  display: block;
  width: 100%;
  height: 100%;
  border-radius: var(--radius);
}
.product-hero__ambient {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(ellipse at 50% 40%, rgba(41,151,255,.03) 0%, transparent 60%);
  mix-blend-mode: screen;
}

/* Callout overlay */
.product-hero__callouts {
  position: absolute;
  inset: 0;
  pointer-events: none;
}
.ph-callout {
  position: absolute;
  display: flex;
  align-items: center;
  gap: .5rem;
  pointer-events: auto;
  opacity: 0;
  transform: translateX(8px);
  transition: opacity .5s var(--ease-out), transform .5s var(--ease-out);
}
.ph-callout.is-visible {
  opacity: 1;
  transform: translateX(0);
}
.ph-callout__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--teal);
  box-shadow: 0 0 8px rgba(48,213,200,.5);
  flex-shrink: 0;
  animation: phDotPulse 2.5s ease-in-out infinite;
}
@keyframes phDotPulse {
  0%, 100% { box-shadow: 0 0 6px rgba(48,213,200,.4); transform: scale(1); }
  50% { box-shadow: 0 0 14px rgba(48,213,200,.7); transform: scale(1.2); }
}
.ph-callout__line {
  width: 30px;
  height: 1px;
  background: linear-gradient(90deg, rgba(48,213,200,.5), rgba(48,213,200,.1));
  flex-shrink: 0;
}
.ph-callout__tag {
  display: flex;
  align-items: center;
  gap: .4rem;
  padding: .35rem .7rem;
  background: rgba(5,5,8,.85);
  border: 1px solid rgba(48,213,200,.12);
  border-radius: var(--radius-xs);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  white-space: nowrap;
}
.ph-callout__num {
  font-size: .55rem;
  font-weight: 700;
  color: var(--teal);
  letter-spacing: .08em;
  font-variant-numeric: tabular-nums;
}
.ph-callout__title {
  font-size: .72rem;
  font-weight: 600;
  color: var(--text);
}

/* Callout positions — distributed around horizontal device */
.ph-callout--inlet      { top: 24%; left: 2%; }
.ph-callout--sediment   { top: 50%; left: 6%; }
.ph-callout--carbon     { top: 50%; left: 26%; }
.ph-callout--membrane   { top: 18%; left: 36%; }
.ph-callout--reject     { top: 8%;  right: 22%; }
.ph-callout--capture    { top: 46%; right: 20%; }
.ph-callout--outlet     { top: 54%; right: 8%; }
.ph-callout--cartridge  { top: 68%; right: 2%; }

/* Returnable cartridge highlight */
.ph-callout--cartridge .ph-callout__label {
  border-color: rgba(48,209,88,.25);
  background: rgba(48,209,88,.08);
}
.ph-callout--cartridge .ph-callout__dot {
  background: var(--green);
  box-shadow: 0 0 6px 2px rgba(48,209,88,.35);
}

/* Left-side callouts: reverse direction so dot points toward device */
.ph-callout--inlet,
.ph-callout--sediment,
.ph-callout--carbon,
.ph-callout--membrane {
  flex-direction: row-reverse;
  transform: translateX(-8px);
}
.ph-callout--inlet.is-visible,
.ph-callout--sediment.is-visible,
.ph-callout--carbon.is-visible,
.ph-callout--membrane.is-visible {
  transform: translateX(0);
}
.ph-callout--inlet .ph-callout__line,
.ph-callout--sediment .ph-callout__line,
.ph-callout--carbon .ph-callout__line,
.ph-callout--membrane .ph-callout__line {
  background: linear-gradient(90deg, rgba(48,213,200,.1), rgba(48,213,200,.5));
}

/* Bottom feature bar */
.product-featurebar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  margin-top: 3rem;
  padding: 1.2rem 2rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  flex-wrap: wrap;
}
.product-fbar__item {
  display: flex;
  align-items: center;
  gap: .65rem;
  padding: .5rem 1.2rem;
  transition: transform .3s var(--ease);
}
.product-fbar__item:hover {
  transform: translateY(-2px);
}
.product-fbar__item strong {
  font-size: .82rem;
  font-weight: 600;
  color: var(--text);
  display: block;
}
.product-fbar__item span {
  font-size: .68rem;
  color: var(--text-3);
  display: block;
}
.product-fbar__sep {
  width: 1px;
  height: 28px;
  background: var(--border);
  flex-shrink: 0;
}
.product-fbar__icon {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background: rgba(48,213,200,.08);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--teal);
  flex-shrink: 0;
}

/* ===== EXPLORER — Step-by-step system section ===== */
.explorer-section {
  position: relative;
  overflow: hidden;
}
.explorer-section__bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 50% 40% at 60% 50%, rgba(48,213,200,.03) 0%, transparent 70%),
    radial-gradient(ellipse 35% 50% at 30% 40%, rgba(41,151,255,.02) 0%, transparent 70%);
  pointer-events: none;
}
.explorer-intro {
  font-size: clamp(.88rem, 1.1vw, 1rem);
  color: var(--text-2);
  line-height: 1.7;
  max-width: 620px;
  margin-bottom: 1.5rem;
}

/* Explorer module — vertical stack of top/body/controls */
.explorer {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

/* Top bar: nav tabs + legend inline */
.explorer__top {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  flex-wrap: wrap;
}

/* Legend — inline with nav */
.explorer-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-left: auto;
}
.explorer-legend__item {
  display: flex;
  align-items: center;
  gap: .35rem;
  font-size: .65rem;
  font-weight: 600;
  color: var(--text-3);
  letter-spacing: .04em;
}
.explorer-legend__dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  flex-shrink: 0;
}
.explorer-legend__dot--blue   { background: var(--blue); }
.explorer-legend__dot--teal   { background: var(--teal); }
.explorer-legend__dot--orange { background: var(--orange); }
.explorer-legend__dot--green  { background: var(--green); }

/* Nav — horizontal tabs */
.explorer__nav {
  display: flex;
  gap: 2px;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
}
.explorer__nav::-webkit-scrollbar { display: none; }

.explorer__step {
  display: flex;
  align-items: center;
  gap: .45rem;
  padding: .5rem .75rem;
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--radius-xs);
  cursor: pointer;
  transition: background .25s, border-color .25s, transform .15s;
  text-align: left;
  white-space: nowrap;
  flex-shrink: 0;
}
.explorer__step:hover {
  background: var(--bg-card);
  border-color: var(--border);
  transform: translateY(-1px);
}
.explorer__step.is-active {
  background: var(--bg-card);
  border-color: rgba(48,213,200,.35);
}

/* Category color dot */
.explorer__step-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  flex-shrink: 0;
  transition: box-shadow .3s;
}
.explorer__step[data-cat="entrada"] .explorer__step-dot,
.explorer__step[data-cat="pretratamiento"] .explorer__step-dot { background: var(--blue); }
.explorer__step[data-cat="separacion"] .explorer__step-dot    { background: var(--teal); }
.explorer__step[data-cat="captura"] .explorer__step-dot       { background: var(--orange); }
.explorer__step[data-cat="salida"] .explorer__step-dot        { background: var(--green); }
.explorer__step[data-cat="retorno"] .explorer__step-dot       { background: var(--green); }
.explorer__step.is-active .explorer__step-dot {
  box-shadow: 0 0 6px 2px currentColor;
}
.explorer__step[data-cat="entrada"].is-active .explorer__step-dot,
.explorer__step[data-cat="pretratamiento"].is-active .explorer__step-dot { box-shadow: 0 0 6px 2px var(--blue); }
.explorer__step[data-cat="separacion"].is-active .explorer__step-dot    { box-shadow: 0 0 6px 2px var(--teal); }
.explorer__step[data-cat="captura"].is-active .explorer__step-dot       { box-shadow: 0 0 6px 2px var(--orange); }
.explorer__step[data-cat="salida"].is-active .explorer__step-dot        { box-shadow: 0 0 6px 2px var(--green); }
.explorer__step[data-cat="retorno"].is-active .explorer__step-dot       { box-shadow: 0 0 6px 2px var(--green); }

.explorer__step-num {
  font-size: .58rem;
  font-weight: 700;
  color: var(--text-3);
  font-variant-numeric: tabular-nums;
  letter-spacing: .05em;
  transition: color .3s;
}
.explorer__step.is-active .explorer__step-num {
  color: var(--teal);
}
.explorer__step-name {
  font-size: .75rem;
  font-weight: 600;
  color: var(--text-2);
  transition: color .3s;
}
.explorer__step.is-active .explorer__step-name {
  color: var(--text);
}

/* Body — canvas + detail SIDE BY SIDE */
.explorer__body {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
  min-height: 380px;
}

.explorer__canvas-wrap {
  position: relative;
  width: 100%;
  min-height: 340px;
  border-radius: var(--radius);
  overflow: hidden;
  background: rgba(5,5,8,.6);
  border: 1px solid var(--border);
  cursor: pointer;
}
#explorerCanvas {
  display: block;
  width: 100%;
  height: 100%;
}
.explorer__canvas-hint {
  position: absolute;
  bottom: .75rem;
  left: 50%;
  transform: translateX(-50%);
  font-size: .65rem;
  font-weight: 600;
  color: var(--text-3);
  letter-spacing: .06em;
  pointer-events: none;
  opacity: .6;
  transition: opacity .4s;
}
.explorer__canvas-wrap:hover .explorer__canvas-hint {
  opacity: 0;
}

/* Detail panel — right side */
.explorer__detail {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  transition: border-color .3s;
  overflow-y: auto;
}
.explorer__detail-header {
  display: flex;
  align-items: center;
  gap: .6rem;
  margin-bottom: .8rem;
  padding-bottom: .6rem;
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
}
.explorer__detail-num {
  font-size: .65rem;
  font-weight: 700;
  color: var(--teal);
  letter-spacing: .08em;
  font-variant-numeric: tabular-nums;
}
.explorer__detail-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text);
}
.explorer__detail-badge {
  margin-left: auto;
  font-size: .55rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--bg);
  padding: .18rem .5rem;
  border-radius: 10px;
  white-space: nowrap;
}
.explorer__detail-badge--entrada,
.explorer__detail-badge--pretratamiento { background: var(--blue); }
.explorer__detail-badge--separacion     { background: var(--teal); }
.explorer__detail-badge--captura        { background: var(--orange); }
.explorer__detail-badge--salida         { background: var(--green); }
.explorer__detail-badge--retorno        { background: var(--green); }
.explorer__detail-type {
  font-size: .72rem;
  color: var(--text-3);
  margin-bottom: .7rem;
  font-style: italic;
}
.explorer__detail-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: .75rem;
}
.explorer__detail-item {
  display: flex;
  flex-direction: column;
  gap: .2rem;
}
.explorer__detail-label {
  font-size: .6rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--teal);
}
.explorer__detail-item p {
  font-size: .78rem;
  color: var(--text-2);
  line-height: 1.5;
  margin: 0;
}

/* Controls */
.explorer__controls {
  display: flex;
  align-items: center;
  gap: 1rem;
}
.explorer__ctrl {
  display: flex;
  align-items: center;
  gap: .4rem;
  padding: .45rem .9rem;
  font-size: .75rem;
  font-weight: 600;
  color: var(--text-2);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xs);
  cursor: pointer;
  transition: border-color .3s, color .3s, transform .2s;
  white-space: nowrap;
}
.explorer__ctrl:hover:not(:disabled) {
  border-color: var(--teal);
  color: var(--text);
  transform: translateY(-1px);
}
.explorer__ctrl:disabled {
  opacity: .3;
  cursor: default;
}
.explorer__progress {
  flex: 1;
  height: 3px;
  background: var(--border);
  border-radius: 2px;
  overflow: hidden;
}
.explorer__progress-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--teal), var(--blue));
  border-radius: 2px;
  transition: width .4s var(--ease-out);
}

/* ===== FOOTER ===== */
.footer {
  border-top: 1px solid var(--border);
  padding: 3rem 0;
}
.footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.footer__brand {
  font-size: 1rem;
}
.footer__sub {
  font-size: .75rem;
  color: var(--text-3);
  margin-left: .5rem;
}
.footer__meta {
  text-align: right;
}
.footer__meta p {
  font-size: .75rem;
  color: var(--text-3);
}
.footer__meta a {
  color: var(--blue);
  transition: opacity .3s;
}
.footer__meta a:hover { opacity: .7; }

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
  .data-grid { grid-template-columns: repeat(2, 1fr); }
  .problem-grid { grid-template-columns: repeat(2, 1fr); }
  .split-section { grid-template-columns: 1fr; gap: 2rem; }
  .product-hero { grid-template-columns: 1fr; gap: 2.5rem; }
  .product-hero__visual { order: -1; max-width: 480px; margin: 0 auto; }
  .product-hero__specs { grid-template-columns: repeat(3, 1fr); }
  .ph-callout { display: none; }
  .product-featurebar { flex-wrap: wrap; gap: .5rem; }
  .product-fbar__sep { display: none; }
  .explorer__top { flex-direction: column; align-items: stretch; gap: .75rem; }
  .explorer__nav { overflow-x: auto; padding-bottom: .5rem; }
  .explorer__body { grid-template-columns: 1fr; gap: 1rem; }
  .explorer__canvas-wrap { min-height: 280px; }
  .explorer-legend { margin-left: 0; }
}

@media (max-width: 768px) {
  .navbar__links, .navbar__cta { display: none; }
  .navbar__toggle { display: block; }
  .navbar__links.active {
    display: flex; flex-direction: column;
    position: absolute; top: var(--nav-h); left: 0; right: 0;
    background: rgba(5,5,8,.96);
    -webkit-backdrop-filter: blur(20px);
    backdrop-filter: blur(20px);
    padding: 1.5rem;
    gap: .5rem;
    border-bottom: 1px solid var(--border);
  }
  .hero__content { padding-top: calc(var(--nav-h) + 20px); }
  .data-grid { grid-template-columns: 1fr 1fr; }
  .problem-grid { grid-template-columns: 1fr; }
  .tech-duo { grid-template-columns: 1fr; }
  .verify-trio { grid-template-columns: 1fr; }
  .pillar-grid { grid-template-columns: 1fr; }
  .scene-showcase { height: 300px; }
  .scene-legend { flex-wrap: wrap; }
  .scene-legend__item { flex: 1 1 45%; min-width: 0; padding: .8rem 1rem; font-size: .72rem; gap: .4rem; }
  .scene-legend__item + .scene-legend__item::before { display: none; }
  .product-hero__canvas-wrap { aspect-ratio: 1 / 1; }
  .product-hero__specs { grid-template-columns: repeat(3, 1fr); }
  .product-fbar__item { flex: 1 1 45%; min-width: 140px; }
  .explorer__canvas-wrap { min-height: 250px; }
  .explorer__detail-grid { grid-template-columns: 1fr; }
  .explorer__controls { flex-wrap: wrap; }
  .footer__inner {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }
  .footer__meta { text-align: center; }
}