/* =========================================================
   SHIVANSH ChemHub — Core Stylesheet
   Design language: precision chemistry / molecular bond motif
   Palette derived from brand mark (green -> blue gradient)
   ========================================================= */

:root{
  /* ---- Brand palette (from logo) ---- */
  --green:        #66ab44;
  --green-light:  #8fcf6b;
  --blue:         #2d70b8;
  --blue-light:   #4f93d6;
  --navy-deep:    #1c2f52;
  --navy-deeper:  #12213c;

  /* ---- Neutrals ---- */
  --ink:          #0e1a2b;
  --ink-soft:     #3d4c63;
  --grey:         #64748b;
  --grey-light:   #94a3b8;
  --line:         #dde5ee;
  --bg:           #f5f8fb;
  --bg-alt:       #eaf1f7;
  --white:        #ffffff;

  /* ---- Gradient signature ---- */
  --grad-brand: linear-gradient(120deg, var(--green) 0%, var(--blue) 100%);
  --grad-deep:  linear-gradient(160deg, var(--navy-deep) 0%, var(--navy-deeper) 100%);

  /* ---- Type ---- */
  --font-display: 'Space Grotesk', 'Segoe UI', sans-serif;
  --font-body:    'Inter', 'Segoe UI', sans-serif;
  --font-mono:    'IBM Plex Mono', 'Courier New', monospace;

  /* ---- Elevation ---- */
  --shadow-sm: 0 1px 2px rgba(14,26,43,0.06), 0 1px 3px rgba(14,26,43,0.08);
  --shadow-md: 0 4px 12px rgba(14,26,43,0.08), 0 2px 4px rgba(14,26,43,0.06);
  --shadow-lg: 0 20px 40px -12px rgba(18,33,60,0.25);
  --shadow-glow: 0 0 0 1px rgba(45,112,184,0.08), 0 8px 30px rgba(45,112,184,0.12);

  /* ---- Motion ---- */
  --ease: cubic-bezier(.22,1,.36,1);
  --fast: 180ms;
  --med: 420ms;
  --slow: 800ms;

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 24px;
  --container: 1400px;
}

@media (prefers-reduced-motion: reduce){
  *, *::before, *::after{
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

*, *::before, *::after{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }

body{
  margin: 0;
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  line-height: 1.6;
  overflow-x: hidden;
}

img{ max-width: 100%; min-height:100% display: block; }

a{ color: inherit; text-decoration: none; }

h1,h2,h3,h4{
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.12;
  letter-spacing: -0.01em;
  margin: 0 0 .5em;
  color: var(--navy-deeper);
}

p{ margin: 0 0 1em; color: var(--ink-soft); }

.container{
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 32px;
}

.mono{ font-family: var(--font-mono); }

:focus-visible{
  outline: 2px solid var(--blue);
  outline-offset: 3px;
  border-radius: 4px;
}

/* =========================================================
   SIGNATURE MOLECULAR-BOND MOTIF
   Reusable line/node pattern used as background texture &
   section divider — represents chemical bonds without cliche.
   ========================================================= */
.bond-field{
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
  z-index: 0;
}
.bond-field svg{ width: 100%; height: 100%; }
.bond-line{
  stroke: url(#bondGradient);
  stroke-width: 1.2;
  opacity: .35;
  stroke-dasharray: 6 500;
  animation: bondFlow 7s linear infinite;
}
.bond-line:nth-child(odd){ animation-duration: 9s; opacity: .22; }
.bond-node{ fill: var(--blue-light); opacity: .55; }
.bond-node.green{ fill: var(--green-light); }
@keyframes bondFlow{
  to{ stroke-dashoffset: -700; }
}
.bond-node{ animation: pulseNode 4.5s ease-in-out infinite; transform-origin: center; }
@keyframes pulseNode{
  0%,100%{ opacity: .3; transform: scale(1); }
  50%{ opacity: .8; transform: scale(1.4); }
}

.divider-bond{
  position: relative;
  height: 46px;
  margin: 0 auto;
  max-width: var(--container);
}

/* =========================================================
   HEADER / NAV
   ========================================================= */
.site-header{
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(245,248,251,0.85);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  border-bottom: 1px solid var(--line);
  transition: box-shadow var(--med) var(--ease);
}
.site-header.scrolled{ box-shadow: var(--shadow-sm); }

.nav-wrap{
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 32px;
  max-width: var(--container);
  margin: 0 auto;
}

.brand{ display: flex; align-items: center; gap: 10px; }
.brand img{ height: 54px; width: auto; }

.nav-links{
  display: flex;
  align-items: center;
  gap: 6px;
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav-links a{
  display: inline-block;
  padding: 10px 16px;
  font-size: 14.5px;
  font-weight: 500;
  color: var(--navy-deep);
  border-radius: 100px;
  position: relative;
  transition: color var(--fast) var(--ease), background var(--fast) var(--ease);
}
.nav-links a:hover{ background: var(--bg-alt); color: var(--blue); }
.nav-links a.active{ color: var(--blue); font-weight: 600; }

.nav-cta{
  display: flex;
  align-items: center;
  gap: 14px;
}

.btn{
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 14.5px;
  border-radius: 100px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform var(--fast) var(--ease), box-shadow var(--med) var(--ease), background var(--fast) var(--ease), color var(--fast) var(--ease), border-color var(--fast) var(--ease);
  white-space: nowrap;
}
.btn-primary{
  background: var(--grad-brand);
  background-size: 160% 160%;
  background-position: 0% 50%;
  color: #fff;
  box-shadow: var(--shadow-glow);
}
.btn-primary:hover{
  background-position: 100% 50%;
  transform: translateY(-2px);
  box-shadow: 0 12px 28px -8px rgba(45,112,184,0.45);
}
.btn-ghost{
  background: transparent;
  border-color: var(--line);
  color: var(--navy-deep);
}
.btn-ghost:hover{
  border-color: var(--blue);
  color: var(--blue);
  transform: translateY(-2px);
}
.btn-sm{ padding: 9px 18px; font-size: 13.5px; }
.btn-block{ width: 100%; }

.nav-toggle{
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  flex-direction: column;
  gap: 5px;
}
.nav-toggle span{
  width: 22px; height: 2px; background: var(--navy-deeper);
  border-radius: 2px; transition: transform var(--fast) var(--ease), opacity var(--fast) var(--ease);
}

/* =========================================================
   HERO
   ========================================================= */
.hero{
  position: relative;
  padding: 96px 0 110px;
  overflow: hidden;
  background: var(--bg);
}
.hero-inner{
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1.05fr .95fr;
  gap: 56px;
  align-items: center;
}
.eyebrow{
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--blue);
  background: rgba(45,112,184,0.08);
  border: 1px solid rgba(45,112,184,0.18);
  padding: 7px 14px;
  border-radius: 100px;
  margin-bottom: 22px;
  opacity: 0;
  animation: fadeUp var(--slow) var(--ease) forwards;
}
.eyebrow::before{
  content: '';
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 0 3px rgba(102,171,68,0.2);
}

.hero h1{
  font-size: clamp(38px, 5vw, 60px);
  opacity: 0;
  animation: fadeUp var(--slow) var(--ease) .12s forwards;
}
.hero h1 .grad{
  background: var(--grad-brand);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero .lead{
  font-size: 18px;
  max-width: 46ch;
  opacity: 0;
  animation: fadeUp var(--slow) var(--ease) .22s forwards;
}
.hero-actions{
  display: flex;
  gap: 14px;
  margin-top: 34px;
  flex-wrap: wrap;
  opacity: 0;
  animation: fadeUp var(--slow) var(--ease) .32s forwards;
}

@keyframes fadeUp{
  from{ opacity: 0; transform: translateY(18px); }
  to{ opacity: 1; transform: translateY(0); }
}

.hero-stats{
  display: flex;
  gap: 34px;
  margin-top: 52px;
  padding-top: 30px;
  border-top: 1px solid var(--line);
  opacity: 0;
  animation: fadeUp var(--slow) var(--ease) .42s forwards;
}
.stat b{
  display: block;
  font-family: var(--font-display);
  font-size: 28px;
  color: var(--white);
}
.stat span{
  font-size: 13px;
  color: var(--white);
}

/* Hero visual: molecular formation card */
.hero-visual{
  position: relative;
  z-index: 2;
  height: 460px;
  opacity: 0;
  animation: fadeUp var(--slow) var(--ease) .3s forwards;
}
.molecule-card{
  position: absolute;
  inset: 0;
  border-radius: var(--radius-lg);
  background: var(--grad-deep);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}
.molecule-card .bond-field{ opacity: .9; }
.molecule-readout {
    position: absolute;
    left: 26px;
    right: 26px;
    bottom: 26px;
    z-index: 3;
    background: rgba(255,255,255,0.06);
    border: 1px solid rgba(255,255,255,0.14);
    backdrop-filter: blur(8px);
    border-radius: var(--radius-md);
    padding: 18px 20px;
    color: var(--navy-deeper);
}
    .molecule-readout .mono {
        font-size: 11.5px;
        color: var(--navy-deeper);
        letter-spacing: .04em;
        text-transform: uppercase;
        margin-bottom: 6px;
        display: block;
    }
.molecule-readout strong{
  font-family: var(--font-display);
  font-size: 20px;
  display: block;
  margin-bottom: 4px;
}
.molecule-badge{
  position: absolute;
  top: 26px; left: 26px;
  z-index: 3;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.16);
  color: #fff;
  font-family: var(--font-mono);
  font-size: 11.5px;
  padding: 8px 14px;
  border-radius: 100px;
}
.molecule-badge b{ color: var(--green-light); }

/* =========================================================
   SECTION SCAFFOLDING
   ========================================================= */
.section{ padding: 100px 0; position: relative; }
.section-alt{ background: var(--bg-alt); }
.section-deep{ background: var(--grad-deep); color: #fff; }
.section-deep h2, .section-deep p{ color: #fff; }
.section-deep .sub{ color: rgba(255,255,255,0.65); }

.section-head{
/*  max-width: 640px;
*/  margin: 0 0 56px;
}
.section-head.center{ margin-left: auto; margin-right: auto; text-align: center; }
.tag{
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--green);
  font-weight: 600;
  display: block;
  margin-bottom: 12px;
}
.section-head h2{ font-size: clamp(28px, 3.4vw, 40px); }
.section-head .sub{ font-size: 16.5px; color: var(--grey); }

/* Reveal-on-scroll */
.reveal{
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .8s var(--ease), transform .8s var(--ease);
}
.reveal.in{ opacity: 1; transform: translateY(0); }
.reveal-stagger > *{ transition-delay: calc(var(--i, 0) * 90ms); }

/* =========================================================
   CARDS — Category / Product / Value
   ========================================================= */
.grid{ display: grid; gap: 26px; }
.grid-3{ grid-template-columns: repeat(4, 1fr); }
.grid-4{ grid-template-columns: repeat(4, 1fr); }
.grid-2{ grid-template-columns: repeat(2, 1fr); }

.card{
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 30px;
  transition: transform var(--med) var(--ease), box-shadow var(--med) var(--ease), border-color var(--med) var(--ease);
  position: relative;
}
.card:hover{
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(45,112,184,0.25);
}

.icon-badge{
  width: 52px; height: 52px;
  border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  background: var(--grad-brand);
  margin-bottom: 20px;
  color: #fff;
  box-shadow: var(--shadow-glow);
}
.icon-badge svg{ width: 26px; height: 26px; }

.value-card h3{ font-size: 18px; }
.value-card p{ font-size: 14.5px; margin-bottom: 0; }

/* Product card */
.product-card{
  background: var(--white);
  border: 0.1px solid var(--line);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: transform var(--med) var(--ease), box-shadow var(--med) var(--ease);
  display: flex;
  flex-direction: column;
}
.product-card:hover{ transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.product-media{
  height: 250px;
  position: relative;
  background: var(--grad-deep);
  overflow: hidden;
}
.product-media .bond-field{ opacity: .8; }
.product-cat {
    position: absolute;
    top: 14px;
    left: 14px;
    font-family: var(--font-mono);
    font-size: 10.5px;
    letter-spacing: .05em;
    text-transform: uppercase;
    color: #fff;
    background: #64a84a;
    border: 1px solid rgba(255,255,255,0.22);
    padding: 5px 11px;
    border-radius: 100px;
}
.product-body{ padding: 22px 24px 24px; flex: 1; display: flex; flex-direction: column; }
.product-body h3{ font-size: 18.5px; margin-bottom: 6px; }
.product-code{
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--grey);
  margin-bottom: 12px;
  display: block;
}
.product-body p{ font-size: 14px; flex: 1; }
.product-link{
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 600;
  font-size: 14px;
  color: var(--blue);
  margin-top: 10px;
  transition: gap var(--fast) var(--ease);
}
.product-link svg{ width: 15px; height: 15px; transition: transform var(--fast) var(--ease); }
.product-card:hover .product-link{ gap: 10px; }
.product-card:hover .product-link svg{ transform: translateX(2px); }

/* Category filter pills */
.filter-row{
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}
.pill{
  padding: 5px 10px;
  border-radius: 100px;
  border: 1px solid var(--line);
  background: var(--white);
  font-size: 13.5px;
  font-weight: 600;
  color: var(--navy-deep);
  cursor: pointer;
  transition: all var(--fast) var(--ease);
}
.pill:hover{ border-color: var(--blue); color: var(--blue); }
.pill.active{ background: var(--grad-brand); color: #fff; border-color: transparent; }

/* =========================================================
   PROCESS / TIMELINE (used sparingly — real sequence only)
   ========================================================= */
.process-row{
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  position: relative;
}
.process-step{
  position: relative;
  padding: 0 20px 0 0;
}
.process-step .num{
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--blue);
  margin-bottom: 14px;
  display: block;
}
.process-step h4{ font-size: 16.5px; margin-bottom: 8px; }
.process-step p{ font-size: 13.5px; }
.process-connector{
  position: absolute;
  top: 8px; left: -10%; right: -10%;
  height: 1px;
  background: repeating-linear-gradient(90deg, var(--line) 0 6px, transparent 6px 12px);
  z-index: 0;
}

/* =========================================================
   STATS BAND
   ========================================================= */
.stats-band{
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
  text-align: center;
}
.stats-band .stat-big b{
  font-family: var(--font-display);
  font-size: 40px;
  display: block;
  background: var(--grad-brand);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.stats-band .stat-big span{
  font-size: 13.5px;
  color: var(--grey);
  letter-spacing: .02em;
}

/* =========================================================
   TESTIMONIAL / QUOTE
   ========================================================= */
.quote-card{
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 40px;
  position: relative;
}
.quote-card .stars{ color: var(--green); font-size: 14px; letter-spacing: 2px; margin-bottom: 16px; }
.quote-card p{ font-size: 16px; color: var(--navy-deep); font-style: italic; }
.quote-person{ display: flex; align-items: center; gap: 12px; margin-top: 20px; }
.quote-avatar{
  width: 40px; height: 40px; border-radius: 50%;
  background: var(--grad-brand);
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-family: var(--font-display); font-weight: 700; font-size: 14px;
}
.quote-person b{ display: block; font-size: 14px; color: var(--navy-deeper); }
.quote-person span{ font-size: 12.5px; color: var(--grey); }

/* =========================================================
   CTA BAND
   ========================================================= */
.cta-band{
  border-radius: var(--radius-lg);
  background: var(--grad-deep);
  padding: 64px;
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
  flex-wrap: wrap;
}
.cta-band h2{ color: #fff; margin-bottom: 10px; font-size: clamp(24px, 3vw, 32px); }
.cta-band p{ color: rgba(255,255,255,0.7); margin-bottom: 0; }
.cta-band .bond-field{ opacity: .5; }

/* =========================================================
   FOOTER
   ========================================================= */
.site-footer{
  background: var(--navy-deeper);
  color: rgba(255,255,255,0.7);
  padding: 76px 0 28px;
}
.footer-grid{
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 40px;
  padding-bottom: 50px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}
.footer-brand img{ height: 72px; margin-bottom: 16px; filter: brightness(0) invert(1); }
.footer-brand p{ color: rgba(255,255,255,0.55); font-size: 14px; max-width: 32ch; }
.footer-social{ display: flex; gap: 10px; margin-top: 18px; }
.footer-social a{
  width: 36px; height: 36px; border-radius: 50%;
  border: 1px solid rgba(255,255,255,0.15);
  display: flex; align-items: center; justify-content: center;
  transition: all var(--fast) var(--ease);
}
.footer-social a:hover{ background: var(--grad-brand); border-color: transparent; transform: translateY(-3px); }
.footer-social svg{ width: 16px; height: 16px; }

.footer-col h4{
  color: #fff;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: .06em;
  margin-bottom: 20px;
}
.footer-col ul{ list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 12px; }
.footer-col a{ font-size: 14.5px; color: rgba(255,255,255,0.62); transition: color var(--fast) var(--ease); }
.footer-col a:hover{ color: var(--green-light); }
.footer-contact li{ display: flex; gap: 10px; font-size: 14px; color: rgba(255,255,255,0.62); align-items: flex-start; }
.footer-contact svg{ width: 16px; height: 16px; flex-shrink: 0; margin-top: 2px; color: var(--green-light); }

.footer-bottom{
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 26px;
  font-size: 13px;
  color: rgba(255,255,255,0.4);
  flex-wrap: wrap;
  gap: 12px;
}
.footer-bottom a{ color: rgba(255,255,255,0.5); }
.footer-bottom a:hover{ color: #fff; }

/* =========================================================
   PAGE HEADER (inner pages)
   ========================================================= */
.page-header{
  position: relative;
  padding: 64px 0 56px;
  background: var(--grad-deep);
  color: #fff;
  overflow: hidden;
}
.page-header .container{ position: relative; z-index: 2; }
.breadcrumb{
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: rgba(255,255,255,0.55);
  margin-bottom: 16px;
}
.breadcrumb a{ color: rgba(255,255,255,0.8); }
.breadcrumb a:hover{ color: var(--green-light); }
.page-header h1{ color: #fff; font-size: clamp(30px, 4vw, 44px); margin-bottom: 10px; }
.page-header p{ color: rgba(255,255,255,0.68); 
/*                max-width: 60ch;
*/                font-size: 16px; margin-bottom: 0; }

/* =========================================================
   FORMS
   ========================================================= */
.form-grid{ display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.field{ display: flex; flex-direction: column; gap: 8px; margin-bottom: 20px; }
.field.full{ grid-column: 1 / -1; }
.field label{ font-size: 13.5px; font-weight: 600; color: var(--navy-deep); }
.field input, .field select, .field textarea{
  font-family: var(--font-body);
  font-size: 14.5px;
  padding: 13px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line);
  background: var(--white);
  color: var(--ink);
  transition: border-color var(--fast) var(--ease), box-shadow var(--fast) var(--ease);
}
.field input:focus, .field select:focus, .field textarea:focus{
  outline: none;
  border-color: var(--blue);
  box-shadow: 0 0 0 4px rgba(45,112,184,0.12);
}
.field textarea{ resize: vertical; min-height: 120px; }

.form-note{ font-size: 13px; color: var(--grey); margin-top: 10px; }
.form-status{ font-size: 14px; margin-top: 14px; display: none; }
.form-status.show{ display: block; }
.form-status.success{ color: var(--green); }

/* =========================================================
   SPEC TABLE (product detail)
   ========================================================= */
.spec-table{
  width: 100%;
  border-collapse: collapse;
  font-size: 14.5px;
}
.spec-table tr{ border-bottom: 1px solid var(--line); }
.spec-table tr:last-child{ border-bottom: none; }
.spec-table td{ padding: 15px 4px; vertical-align: top; }
.spec-table td:first-child{
  width: 36%;
  color: var(--grey);
  font-family: var(--font-mono);
  font-size: 12.5px;
  text-transform: uppercase;
  letter-spacing: .03em;
}
.spec-table td:last-child{ color: var(--navy-deeper); font-weight: 500; }

.tab-row{ display: flex; gap: 6px; border-bottom: 1px solid var(--line); margin-bottom: 30px; flex-wrap: wrap; }
.tab-btn{
  padding: 13px 20px;
  font-size: 14.5px;
  font-weight: 600;
  color: var(--grey);
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  cursor: pointer;
  margin-bottom: -1px;
  transition: color var(--fast) var(--ease), border-color var(--fast) var(--ease);
}
.tab-btn:hover{ color: var(--navy-deep); }
.tab-btn.active{ color: var(--blue); border-color: var(--blue); }
.tab-panel{ display: none; }
.tab-panel.active{ display: block; animation: fadeUp .5s var(--ease); }

.chip-list{ display: flex; flex-wrap: wrap; gap: 10px; }
.chip{
  font-size: 13px;
  font-weight: 600;
  padding: 8px 15px;
  border-radius: 100px;
  background: var(--bg-alt);
  color: var(--navy-deep);
  border: 1px solid var(--line);
}

.check-list{ list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 14px; }
.check-list li{ display: flex; gap: 12px; font-size: 15px; color: var(--ink-soft); align-items: flex-start; }
.check-list svg{ width: 19px; height: 19px; flex-shrink: 0; color: var(--green); margin-top: 2px; }

/* Related products rail */
.rail{ display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }

/* Back to top */
.to-top{
  position: fixed;
  bottom: 28px; right: 28px;
  width: 46px; height: 46px;
  border-radius: 50%;
  background: var(--grad-brand);
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  box-shadow: var(--shadow-lg);
  border: none;
  cursor: pointer;
  opacity: 0;
  pointer-events: none;
  transform: translateY(10px);
  transition: all var(--med) var(--ease);
  z-index: 90;
}
.to-top.show{ opacity: 1; pointer-events: auto; transform: translateY(0); }
.to-top svg{ width: 18px; height: 18px; }

/* =========================================================
   UTILITIES
   ========================================================= */
.flex{ display: flex; }
.items-center{ align-items: center; }
.gap-8{ gap: 8px; } .gap-12{ gap: 12px; } .gap-16{ gap: 16px; }
.mt-0{ margin-top: 0; } .mb-0{ margin-bottom: 0; }
.text-center{ text-align: center; }
.w-full{ width: 100%; }

/* =========================================================
   RESPONSIVE
   ========================================================= */
@media (max-width: 1080px){
  .grid-4{ grid-template-columns: repeat(2, 1fr); }
  .grid-3{ grid-template-columns: repeat(2, 1fr); }
  .footer-grid{ grid-template-columns: 1fr 1fr; }
  .process-row{ grid-template-columns: repeat(2, 1fr); gap: 34px 20px; }
  .stats-band{ grid-template-columns: repeat(2, 1fr); gap: 30px 20px; }
}

@media (max-width: 860px){
  .hero-inner{ grid-template-columns: 1fr; }
  .hero-visual{ height: 320px; order: -1; }
  .nav-links{ display: none; }
  .nav-toggle{ display: flex; }
  .btn-ghost.nav-only{ display:none; }
    .category-slider {
        gap: 18px;
        padding: 10px 20px;
    }

    .category-card {
        flex: 0 0 240px;
        height: 280px;
    }

    .overlay h4 {
        font-size: 20px;
    }
  .nav-links.open{
    display: flex;
    position: absolute;
    top: 100%; left: 0; right: 0;
    background: var(--white);
    flex-direction: column;
    padding: 12px 20px 20px;
    border-bottom: 1px solid var(--line);
    box-shadow: var(--shadow-md);
    gap: 2px;
  }
  .nav-links.open a{ width: 100%; padding: 13px 16px; }

  .grid-3, .grid-4{ grid-template-columns: 1fr 1fr; }
  .rail{ grid-template-columns: 1fr; }
  .form-grid{ grid-template-columns: 1fr; }
  .cta-band{ padding: 44px 30px; flex-direction: column; text-align: center; }
  .footer-grid{ grid-template-columns: 1fr 1fr; gap: 34px 20px; }
}

@media (max-width: 620px){
  .container{ padding: 0 20px; }
    .hero-inner {
        grid-template-columns: 1fr !important;
    }
    .about-card {
        height: 200px;
        overflow: hidden;
    }

        .about-card img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
  .nav-wrap{ padding: 14px 20px; }
  .hero{ padding: 56px 0 70px; }
  .section{ padding: 64px 0; }
  .grid-3, .grid-4, .grid-2{ grid-template-columns: 1fr; }
  .hero-stats{ flex-wrap: wrap; gap: 22px; }
  .process-row{ grid-template-columns: 1fr; }
  .stats-band{ grid-template-columns: 1fr 1fr; }
  .footer-grid{ grid-template-columns: 1fr; gap: 34px; }
  .footer-bottom{ flex-direction: column; align-items: flex-start; }
  .quote-card{ padding: 28px; }
  .cta-band .btn{ width: 100%; }
  .page-header{ padding: 44px 0 40px; }
    .category-slider-wrapper {
        margin-top: 25px;
    }

    .category-slider {
        gap: 14px;
        padding: 0 16px 15px;
        scroll-snap-type: x mandatory;
    }

    .category-card {
        flex: 0 0 80%;
        max-width: 300px;
        height: 240px;
        scroll-snap-align: start;
    }

    .overlay {
        padding: 18px;
    }

        .overlay h4 {
            font-size: 18px;
        }

        .overlay span {
            font-size: 13px;
        }

    .cat-arrow {
        display: flex;
        align-items: center;
        justify-content: center;
        width: 40px;
        height: 40px;
        font-size: 18px;
    }

        .cat-arrow.left {
            left: 8px;
        }

        .cat-arrow.right {
            right: 8px;
        }

}