/* ============================================================
   SUSTAINEO - Deep-Tech Critical Materials Platform
   Design System v3.0 - Natural Mineral Palette
   Colours derived from the minerals we recover:
   Malachite · Native Copper · Gold Ore · Verdigris · Limestone
   ============================================================ */

/* 
  NOTE: Adobe Fonts requires a Typekit Project ID. 
  Please add your stylesheet link to index.html:
  <link rel="stylesheet" href="https://use.typekit.net/YOUR_ID.css">
*/

/* ---- TOKENS ---- */
:root {
  /* Backgrounds - clean glassy white */
  --bg-base:      #FFFFFF;   /* pure white */
  --bg-soft:      #F4F7F5;   /* very light green-white */
  --bg-mid:       #EDF1EE;   /* soft white-green */
  --bg-accent:    #E3EAE6;   /* pale green-grey */

  /* Glass - white frost */
  --glass-bg:     rgba(255, 255, 255, 0.60);
  --glass-bg-2:   rgba(255, 255, 255, 0.92);
  --glass-border: rgba(255, 255, 255, 0.95);
  --glass-border-soft: rgba(61, 123, 88, 0.12);

  /* Text - deep forest ink */
  --text-primary:   #1C2820;   /* deep forest */
  --text-secondary: #3A4A3C;   /* medium forest */
  --text-muted:     #6E7E70;   /* stone grey */
  --text-light:     #9EA89E;   /* pale stone */

  /* Malachite - Cu₂CO₃(OH)₂, natural copper carbonate mineral */
  --emerald:    #3D7B58;   /* malachite green */
  --emerald-d:  #2A5E42;   /* deep malachite */
  --emerald-l:  #C4DCCE;   /* pale malachite wash */

  /* Verdigris - oxidised copper patina */
  --teal:       #2E7070;   /* natural verdigris */
  --teal-l:     #C0D8D8;   /* pale verdigris */

  /* Gold ore - native gold & auriferous quartz */
  --gold:       #A87828;   /* gold ore */
  --gold-l:     #C8A040;   /* polished gold */
  --gold-ll:    #EEE0B8;   /* pale gold wash */

  /* Copper - native copper colour */
  --copper:     #965028;   /* raw copper */
  --copper-l:   #C07848;   /* oxidised copper */

  /* Dark tones */
  --navy:       #1C2820;   /* deep forest ink */
  --navy-mid:   #2A3E30;   /* mid forest */

  /* Shadows - clean white glass */
  --shadow-xs:  0 1px 4px  rgba(0, 0, 0, 0.05);
  --shadow-sm:  0 2px 12px rgba(0, 0, 0, 0.06);
  --shadow-md:  0 8px 32px rgba(0, 0, 0, 0.08);
  --shadow-lg:  0 20px 60px rgba(0, 0, 0, 0.10);
  --shadow-em:  0 8px 28px rgba(61, 123, 88, 0.20);

  --transition: 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  
  /* Adobe Fonts Setup */
  --font-main:  'acumin-pro', sans-serif;   /* Exceptionally clean, neo-grotesque body font */
  --font-head:  'termina', sans-serif;      /* Wide, authoritative, industrial tech heading font */
  
  --radius-sm:  10px;
  --radius-md:  16px;
  --radius-lg:  22px;
}

/* ---- RESET ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font-main);
  background: var(--bg-base);
  color: var(--text-primary);
  overflow-x: hidden;
  line-height: 1.6;
  background-image:
    radial-gradient(ellipse at 20% 0%, rgba(61,123,88,0.06) 0%, transparent 55%),
    radial-gradient(ellipse at 80% 100%, rgba(46,112,112,0.05) 0%, transparent 55%);
  background-attachment: fixed;
  opacity: 0;
  animation: pageFadeIn 0.8s ease-in-out forwards;
}

@keyframes pageFadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* ---- SCROLLBAR ---- */
::-webkit-scrollbar { width: 5px; }
::-webkit-scrollbar-track { background: var(--bg-soft); }
::-webkit-scrollbar-thumb { background: var(--emerald); border-radius: 3px; }

/* ---- SELECTION ---- */
::selection { background: var(--emerald-l); color: var(--emerald-d); }

/* ============================================================
   NAVIGATION - Floating Pill
   ============================================================ */
.nav {
  position: fixed;
  top: 1.1rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1000;
  width: calc(100% - 3rem);
  max-width: 1100px;
  padding: 0.82rem 1.6rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(255, 255, 255, 0.80);
  backdrop-filter: blur(24px) saturate(1.8);
  -webkit-backdrop-filter: blur(24px) saturate(1.8);
  border: 1px solid rgba(255, 255, 255, 0.90);
  border-radius: 100px;
  box-shadow: 0 4px 24px rgba(28, 40, 32, 0.10),
              0 1px 0 rgba(255,255,255,0.85) inset;
  transition: all 0.35s ease;
}
.nav.scrolled {
  background: rgba(255, 255, 255, 0.97);
  top: 0.6rem;
  box-shadow: 0 8px 36px rgba(28, 40, 32, 0.13),
              0 1px 0 rgba(255,255,255,0.9) inset;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
}
.nav-logo img {
  height: 42px;
  width: auto;
}
.nav-logo-text { display: flex; flex-direction: column; }
.nav-logo-name {
  font-family: var(--font-head);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: 0.02em;
  line-height: 1.1;
}
.nav-logo-sub {
  font-size: 0.62rem;
  color: var(--emerald-d);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
}
.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.87rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  transition: color var(--transition);
  position: relative;
}
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px; left: 0;
  width: 0; height: 2px;
  background: var(--emerald);
  border-radius: 2px;
  transition: width var(--transition);
}
.nav-links a:hover { color: var(--emerald-d); }
.nav-links a:hover::after { width: 100%; }
.nav-cta {
  background: var(--emerald) !important;
  color: #fff !important;
  padding: 0.5rem 1.3rem;
  border-radius: 50px;
  font-weight: 700 !important;
  box-shadow: var(--shadow-em);
  transition: all var(--transition) !important;
}
.nav-cta:hover {
  background: var(--emerald-d) !important;
  transform: translateY(-2px);
  box-shadow: 0 10px 30px rgba(16,185,129,0.35) !important;
}
.nav-cta::after { display: none !important; }
.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
  background: none;
  border: none;
}
.nav-hamburger span {
  display: block;
  width: 24px; height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all 0.3s;
}

/* ============================================================
   HERO SECTION
   ============================================================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: var(--bg-base);
}

/* Animated flowing lines - drawn in JS canvas on top */
.hero-particles {
  position: absolute;
  inset: 0;
  z-index: 2;
  pointer-events: none;
}
/* Limestone-to-transparent left-side fade */
.hero-svg-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(
    96deg,
    rgba(245,241,234,1.00) 0%,
    rgba(245,241,234,0.93) 30%,
    rgba(245,241,234,0.55) 52%,
    rgba(245,241,234,0.05) 76%,
    rgba(245,241,234,0.00) 100%
  );
  z-index: 3;
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 4;
  max-width: 1200px;
  margin: 0 auto;
  padding: 8rem 2.5rem 4rem;
  width: 100%;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(16,185,129,0.10);
  border: 1px solid rgba(16,185,129,0.25);
  color: var(--emerald-d);
  padding: 0.4rem 1rem;
  border-radius: 50px;
  font-size: 0.73rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 1.75rem;
  animation: fadeUp 0.8s ease 0.2s both;
  backdrop-filter: blur(8px);
}
.hero-badge-dot {
  width: 7px; height: 7px;
  background: var(--emerald);
  border-radius: 50%;
  animation: pulse 2s infinite;
}
.hero-headline {
  font-family: var(--font-head);
  font-size: clamp(2.4rem, 5.5vw, 4.8rem);
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: -0.025em;
  color: var(--text-primary);
  margin-bottom: 1.5rem;
  animation: fadeUp 0.8s ease 0.4s both;
}
.hero-headline em {
  font-style: normal;
  background: linear-gradient(135deg, var(--emerald-d), var(--teal));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-sub {
  font-size: clamp(0.98rem, 1.8vw, 1.15rem);
  color: var(--text-secondary);
  max-width: 540px;
  margin-bottom: 2.5rem;
  font-weight: 400;
  line-height: 1.75;
  animation: fadeUp 0.8s ease 0.6s both;
}
.hero-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  animation: fadeUp 0.8s ease 0.8s both;
}
.hero-explorer {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.75rem;
  max-width: 920px;
  margin-top: 1.4rem;
  animation: fadeUp 0.8s ease 0.9s both;
}
.explorer-link {
  display: grid;
  gap: 0.3rem;
  min-height: 180px;
  padding: 1.25rem;
  color: var(--text-secondary);
  text-decoration: none;
  background: rgba(255, 255, 255, 0.65);
  border: 1px solid rgba(61, 123, 88, 0.14);
  border-radius: 8px;
  box-shadow: var(--shadow-xs);
  backdrop-filter: blur(12px);
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition), background var(--transition);
}
.explorer-link:hover {
  transform: translateY(-4px);
  background: rgba(255, 255, 255, 0.84);
  border-color: rgba(61, 123, 88, 0.38);
  box-shadow: var(--shadow-md);
}
.explorer-kicker {
  font-size: 0.64rem;
  font-weight: 800;
  color: var(--gold);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.explorer-title {
  font-family: var(--font-head);
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.2;
}
.explorer-desc {
  font-size: 0.74rem;
  color: var(--text-muted);
  line-height: 1.55;
  margin-top: 0.1rem;
}
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--emerald);
  color: #fff;
  padding: 0.9rem 2rem;
  border-radius: 50px;
  font-weight: 700;
  font-size: 0.95rem;
  text-decoration: none;
  transition: all var(--transition);
  border: none;
  cursor: pointer;
  letter-spacing: 0.02em;
  box-shadow: var(--shadow-em);
}
.btn-primary:hover {
  background: var(--emerald-d);
  transform: translateY(-3px);
  box-shadow: 0 16px 40px rgba(16,185,129,0.35);
}
.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(255,255,255,0.75);
  color: var(--text-primary);
  padding: 0.9rem 2rem;
  border-radius: 50px;
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  transition: all var(--transition);
  border: 1.5px solid rgba(0,0,0,0.12);
  cursor: pointer;
  letter-spacing: 0.02em;
  backdrop-filter: blur(8px);
}
.btn-outline:hover {
  border-color: var(--emerald);
  color: var(--emerald-d);
  background: rgba(16,185,129,0.06);
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}
.hero-stats {
  display: flex;
  gap: 2.5rem;
  margin-top: 3.5rem;
  padding-top: 2rem;
  border-top: 1px solid rgba(0,0,0,0.08);
  flex-wrap: wrap;
  animation: fadeUp 0.8s ease 1s both;
}
.hero-stat-value {
  font-family: var(--font-head);
  font-size: 1.9rem;
  font-weight: 700;
  color: var(--emerald-d);
  line-height: 1;
}
.hero-stat-label {
  font-size: 0.72rem;
  color: var(--text-muted);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-top: 0.3rem;
}
.hero-scroll-hint {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 3;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.4rem;
  animation: fadeUp 1s ease 1.4s both;
}
.hero-scroll-hint span {
  font-size: 0.68rem;
  color: var(--text-muted);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--emerald), transparent);
  animation: scrollLine 2s ease infinite;
}

/* ============================================================
   SECTION COMMONS
   ============================================================ */
section {
  padding: 6rem 2.5rem;
}
.container {
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
}
.section-label {
  font-size: 0.71rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--emerald-d);
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}
.section-label::before {
  content: '';
  display: block;
  width: 24px; height: 2px;
  background: var(--emerald);
  border-radius: 2px;
}
.section-title {
  font-family: var(--font-head);
  font-size: clamp(1.9rem, 3.8vw, 3rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  margin-bottom: 1.25rem;
}
.section-title em {
  font-style: normal;
  background: linear-gradient(135deg, var(--emerald-d), var(--teal));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.section-desc {
  font-size: 1.02rem;
  color: var(--text-secondary);
  max-width: 600px;
  line-height: 1.75;
}
.text-center { text-align: center; }
.text-center .section-label { justify-content: center; }
.text-center .section-label::before { display: none; }
.text-center .section-desc { margin: 0 auto; }

/* ============================================================
   GLASS CARD BASE
   ============================================================ */
.glass-card {
  background: var(--glass-bg);
  backdrop-filter: blur(20px) saturate(1.6);
  -webkit-backdrop-filter: blur(20px) saturate(1.6);
  border: 1px solid rgba(255,255,255,0.9);
  box-shadow: var(--shadow-md),
              inset 0 1px 0 rgba(255,255,255,0.8);
}

/* ============================================================
   SECTION 2 - THE PROBLEM
   ============================================================ */
.problem-section {
  background: var(--bg-soft);
  position: relative;
  overflow: hidden;
}
.problem-section::before {
  content: '';
  position: absolute;
  top: -180px; right: -180px;
  width: 500px; height: 500px;
  background: radial-gradient(circle, rgba(16,185,129,0.07) 0%, transparent 65%);
  pointer-events: none;
}
.problem-section::after {
  content: '';
  position: absolute;
  bottom: -120px; left: -120px;
  width: 400px; height: 400px;
  background: radial-gradient(circle, rgba(6,214,160,0.05) 0%, transparent 65%);
  pointer-events: none;
}
.problem-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-top: 3.5rem;
}
.problem-card {
  background: var(--glass-bg-2);
  backdrop-filter: blur(20px) saturate(1.5);
  -webkit-backdrop-filter: blur(20px) saturate(1.5);
  border: 1px solid rgba(255,255,255,0.95);
  box-shadow: var(--shadow-md),
              inset 0 1px 0 rgba(255,255,255,0.9);
  border-radius: var(--radius-lg);
  padding: 2rem;
  position: relative;
  overflow: hidden;
  transition: all var(--transition);
}
.problem-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}
.problem-card:nth-child(1)::before { background: linear-gradient(90deg, #F59E0B, #EF4444); }
.problem-card:nth-child(2)::before { background: linear-gradient(90deg, #F59E0B, #8B5CF6); }
.problem-card:nth-child(3)::before { background: linear-gradient(90deg, #3B82F6, #06D6A0); }
.problem-card:hover {
  transform: translateY(-7px);
  box-shadow: var(--shadow-lg), 0 0 0 1px rgba(16,185,129,0.15),
              inset 0 1px 0 rgba(255,255,255,0.95);
}
.problem-icon {
  font-size: 2.5rem;
  margin-bottom: 1rem;
  display: block;
}
.problem-metric {
  font-family: var(--font-head);
  font-size: 2.6rem;
  font-weight: 700;
  color: var(--gold);
  line-height: 1;
  margin-bottom: 0.5rem;
}
.problem-card h3 {
  font-family: var(--font-head);
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
}
.problem-card p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.68;
}
.problem-statement {
  margin-top: 3rem;
  padding: 2rem 2.5rem;
  background: rgba(16,185,129,0.06);
  border: 1px solid rgba(16,185,129,0.18);
  border-radius: var(--radius-md);
  text-align: center;
  backdrop-filter: blur(12px);
}
.problem-statement p {
  font-size: 1.1rem;
  color: var(--text-secondary);
  line-height: 1.78;
  max-width: 720px;
  margin: 0 auto;
}
.problem-statement strong { color: var(--emerald-d); font-weight: 700; }

/* ============================================================
   SECTION 3 - TECHNOLOGY
   ============================================================ */
.tech-section {
  background: var(--bg-base);
  position: relative;
}
.tech-section::before {
  content: '';
  position: absolute;
  bottom: -200px; left: -150px;
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(61,123,88,0.05) 0%, transparent 68%);
  pointer-events: none;
}

/* Repurposed SVG Schematic Container */
.tech-schematic-container {
  width: 100%;
  height: 550px;
  position: relative;
  margin: 3rem 0 4rem;
  display: flex;
  justify-content: center;
  align-items: center;
  background: rgba(255,255,255,0.4);
  border: 1px solid rgba(61,123,88,0.1);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}
.tech-schematic-svg {
  width: 100%;
  height: 100%;
  opacity: 0.95;
  pointer-events: none;
  transition: transform 0.1s ease-out;
  transform-style: preserve-3d;
  filter: drop-shadow(0 10px 30px rgba(61,123,88,0.15));
}

@media (max-width: 900px) {
  .tech-schematic-container { height: 400px; margin: 2rem 0 3rem; }
}
@media (max-width: 600px) {
  .tech-schematic-container { height: 300px; }
}

.tech-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  align-items: start;
  margin-top: 1rem;
}
.tech-process-title {
  font-family: var(--font-head);
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--emerald-d);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 2rem;
}
.process-flow { display: flex; flex-direction: column; gap: 0; }
.process-step {
  display: flex;
  align-items: flex-start;
  gap: 1.25rem;
  position: relative;
  padding-bottom: 1.75rem;
}
.process-step:last-child { padding-bottom: 0; }
.process-step-left {
  display: flex;
  flex-direction: column;
  align-items: center;
  flex-shrink: 0;
}
.process-step-num {
  width: 44px; height: 44px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--emerald), var(--teal));
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-head);
  font-size: 0.85rem;
  font-weight: 700;
  color: #fff;
  flex-shrink: 0;
  box-shadow: var(--shadow-em);
}
.process-step-line {
  width: 2px;
  flex: 1;
  min-height: 28px;
  background: linear-gradient(to bottom, var(--emerald), rgba(16,185,129,0.1));
  margin: 4px 0;
  border-radius: 2px;
}
.process-step:last-child .process-step-line { display: none; }
.process-step-content { padding-top: 0.6rem; }
.process-step-content h4 {
  font-family: var(--font-head);
  font-size: 0.97rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.35rem;
}
.process-step-content p {
  font-size: 0.86rem;
  color: var(--text-secondary);
  line-height: 1.65;
}
.process-tag {
  display: inline-block;
  background: rgba(16,185,129,0.10);
  border: 1px solid rgba(16,185,129,0.20);
  color: var(--emerald-d);
  padding: 0.18rem 0.6rem;
  border-radius: 5px;
  font-size: 0.67rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-top: 0.45rem;
}
.tech-advantages {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: 0;
}
.advantage-card {
  background: var(--glass-bg-2);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(255,255,255,0.9);
  box-shadow: var(--shadow-sm),
              inset 0 1px 0 rgba(255,255,255,0.8);
  border-radius: var(--radius-md);
  padding: 1.4rem;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}
.advantage-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 3px; height: 100%;
  background: linear-gradient(to bottom, var(--emerald), var(--teal));
  border-radius: 0;
  opacity: 0;
  transition: opacity var(--transition);
}
.advantage-card:hover {
  border-color: rgba(16,185,129,0.25);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg), inset 0 1px 0 rgba(255,255,255,0.9);
}
.advantage-card:hover::before { opacity: 1; }
.advantage-icon { font-size: 1.4rem; margin-bottom: 0.6rem; display: block; }
.advantage-card h4 {
  font-family: var(--font-head);
  font-size: 0.87rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.35rem;
}
.advantage-card p { font-size: 0.78rem; color: var(--text-secondary); line-height: 1.55; }
.no-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  background: rgba(239,68,68,0.07);
  border: 1px solid rgba(239,68,68,0.15);
  color: #B91C1C;
  padding: 0.18rem 0.5rem;
  border-radius: 4px;
  font-size: 0.66rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  margin-top: 0.4rem;
}

/* ============================================================
   SECTION 4 - KEY METRICS
   ============================================================ */
.metrics-section {
  background: var(--bg-soft);
  position: relative;
  overflow: hidden;
}
.metrics-section::before {
  content: '';
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 800px; height: 400px;
  background: radial-gradient(ellipse, rgba(16,185,129,0.06) 0%, transparent 65%);
  pointer-events: none;
}
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  margin-top: 3rem;
}
.metric-card {
  text-align: center;
  padding: 2.5rem 1.5rem;
  background: var(--glass-bg-2);
  backdrop-filter: blur(24px) saturate(1.7);
  -webkit-backdrop-filter: blur(24px) saturate(1.7);
  border: 1px solid rgba(255,255,255,0.95);
  box-shadow: var(--shadow-md), inset 0 1px 0 rgba(255,255,255,0.9);
  border-radius: var(--radius-lg);
  position: relative;
  overflow: hidden;
  transition: all var(--transition);
}
.metric-card::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--emerald), transparent);
  opacity: 0;
  transition: opacity var(--transition);
  border-radius: 0 0 var(--radius-lg) var(--radius-lg);
}
.metric-card:hover {
  transform: translateY(-7px);
  box-shadow: var(--shadow-lg), 0 0 0 1px rgba(16,185,129,0.12),
              inset 0 1px 0 rgba(255,255,255,0.95);
}
.metric-card:hover::after { opacity: 1; }
.metric-value {
  font-family: var(--font-head);
  font-size: 3.2rem;
  font-weight: 700;
  line-height: 1;
  margin-bottom: 0.5rem;
  background: linear-gradient(135deg, var(--emerald-d), var(--teal));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.metric-label {
  font-family: var(--font-head);
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.4rem;
}
.metric-desc {
  font-size: 0.78rem;
  color: var(--text-muted);
  line-height: 1.55;
}

/* ============================================================
   SECTION 5 - MATERIALS
   ============================================================ */
.materials-section {
  background: var(--bg-base);
  position: relative;
}
.materials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(155px, 1fr));
  gap: 1rem;
  margin-top: 3rem;
}
.material-card {
  background: var(--glass-bg-2);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(255,255,255,0.9);
  box-shadow: var(--shadow-sm), inset 0 1px 0 rgba(255,255,255,0.85);
  border-radius: var(--radius-md);
  padding: 1.6rem 1rem;
  text-align: center;
  cursor: pointer;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}
.material-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(16,185,129,0.07), rgba(6,214,160,0.03));
  opacity: 0;
  transition: opacity var(--transition);
}
.material-card:hover {
  border-color: rgba(16,185,129,0.30);
  transform: translateY(-6px) scale(1.02);
  box-shadow: var(--shadow-lg), 0 0 0 1px rgba(16,185,129,0.12);
}
.material-card:hover::before { opacity: 1; }
.material-symbol {
  font-family: var(--font-head);
  font-size: 2.1rem;
  font-weight: 700;
  color: var(--gold);
  line-height: 1;
  position: relative;
  z-index: 1;
}
.material-name {
  font-size: 0.8rem;
  color: var(--text-primary);
  font-weight: 600;
  margin-top: 0.3rem;
  position: relative;
  z-index: 1;
}
.material-sub {
  font-size: 0.68rem;
  color: var(--text-muted);
  margin-top: 0.2rem;
  position: relative;
  z-index: 1;
}
.material-tag {
  display: inline-block;
  background: rgba(16,185,129,0.10);
  color: var(--emerald-d);
  border: 1px solid rgba(16,185,129,0.18);
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
  font-size: 0.61rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-top: 0.5rem;
  position: relative;
  z-index: 1;
}
.material-card.non-metal .material-symbol { color: var(--teal); }

/* ============================================================
   SECTION 6 - WASTE STREAMS
   ============================================================ */
.streams-section {
  background: var(--bg-soft);
  position: relative;
}
.streams-tabs {
  display: flex;
  gap: 0.5rem;
  margin: 2.5rem 0 0;
  border-bottom: 1px solid rgba(0,0,0,0.08);
  padding-bottom: 0;
}
.stream-tab {
  padding: 0.75rem 1.5rem;
  border: none;
  background: transparent;
  color: var(--text-muted);
  font-family: var(--font-head);
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: all 0.3s;
  letter-spacing: 0.02em;
}
.stream-tab:hover { color: var(--text-primary); }
.stream-tab.active {
  color: var(--emerald-d);
  border-bottom-color: var(--emerald);
}
.stream-content { display: none; padding-top: 3rem; }
.stream-content.active { display: block; }
.stream-timeline {
  display: flex;
  align-items: stretch;
  gap: 0;
  position: relative;
  flex-wrap: wrap;
}
.stream-node {
  flex: 1;
  min-width: 130px;
  text-align: center;
  position: relative;
}
.stream-node::after {
  content: '→';
  position: absolute;
  right: -12px;
  top: 28px;
  color: var(--emerald);
  font-size: 1.2rem;
  z-index: 2;
}
.stream-node:last-child::after { display: none; }
.stream-node-icon {
  width: 62px; height: 62px;
  border-radius: var(--radius-sm);
  background: var(--glass-bg-2);
  backdrop-filter: blur(16px);
  border: 1px solid rgba(255,255,255,0.9);
  box-shadow: var(--shadow-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.65rem;
  margin: 0 auto 1rem;
  transition: all var(--transition);
}
.stream-node:hover .stream-node-icon {
  background: rgba(16,185,129,0.08);
  border-color: rgba(16,185,129,0.25);
  box-shadow: var(--shadow-em);
  transform: scale(1.08) translateY(-3px);
}
.stream-node-label {
  font-family: var(--font-head);
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.3rem;
}
.stream-node-desc {
  font-size: 0.7rem;
  color: var(--text-muted);
  line-height: 1.5;
  padding: 0 0.5rem;
}
.stream-output {
  margin-top: 3rem;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 0.8rem;
}
.output-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  background: rgba(16,185,129,0.06);
  border: 1px solid rgba(16,185,129,0.14);
  border-radius: var(--radius-sm);
  padding: 0.85rem 1.1rem;
  backdrop-filter: blur(8px);
}
.output-dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--emerald);
  flex-shrink: 0;
}
.output-text { font-size: 0.81rem; color: var(--text-secondary); font-weight: 500; }

/* ============================================================
   SECTION 7 - WHY SUSTAINEO
   ============================================================ */
.why-section {
  background: var(--bg-base);
  position: relative;
  overflow: hidden;
}
.why-section::before {
  content: '';
  position: absolute;
  top: -100px; right: -100px;
  width: 500px; height: 500px;
  background: radial-gradient(circle, rgba(16,185,129,0.05) 0%, transparent 65%);
  pointer-events: none;
}
.why-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
  margin-top: 3rem;
}
.why-card {
  background: var(--glass-bg-2);
  backdrop-filter: blur(20px) saturate(1.5);
  -webkit-backdrop-filter: blur(20px) saturate(1.5);
  border: 1px solid rgba(255,255,255,0.95);
  box-shadow: var(--shadow-md), inset 0 1px 0 rgba(255,255,255,0.9);
  border-radius: var(--radius-lg);
  padding: 2rem;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}
.why-card::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(16,185,129,0.04), transparent);
  opacity: 0;
  transition: opacity var(--transition);
  pointer-events: none;
}
.why-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg), 0 0 0 1px rgba(61,123,88,0.16),
              inset 0 1px 0 rgba(255,255,255,0.95);
}
.why-card:hover::after { opacity: 1; }
.why-icon {
  width: 52px; height: 52px;
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(61,123,88,0.10), rgba(46,112,112,0.05));
  border: 1px solid rgba(61,123,88,0.16);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 1.25rem;
}
.why-card h3 {
  font-family: var(--font-head);
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.6rem;
}
.why-card p { font-size: 0.86rem; color: var(--text-secondary); line-height: 1.68; }
.why-differentiator {
  display: inline-block;
  background: rgba(217,119,6,0.08);
  border: 1px solid rgba(217,119,6,0.18);
  color: var(--gold);
  padding: 0.2rem 0.6rem;
  border-radius: 4px;
  font-size: 0.67rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-top: 0.8rem;
}

/* ============================================================
   SECTION 8 - INDUSTRIES
   ============================================================ */
.industries-section {
  background: var(--bg-soft);
}
.industries-scroll {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
  margin-top: 3rem;
}
.industry-card {
  background: var(--glass-bg-2);
  backdrop-filter: blur(18px) saturate(1.5);
  -webkit-backdrop-filter: blur(18px) saturate(1.5);
  border: 1px solid rgba(255,255,255,0.95);
  box-shadow: var(--shadow-md), inset 0 1px 0 rgba(255,255,255,0.85);
  border-radius: var(--radius-lg);
  padding: 2rem;
  transition: all var(--transition);
  cursor: pointer;
  position: relative;
  overflow: hidden;
}
.industry-card::before {
  content: '';
  position: absolute;
  top: -60%; left: -60%;
  width: 220%; height: 220%;
  background: radial-gradient(circle, rgba(16,185,129,0.05) 0%, transparent 50%);
  opacity: 0;
  transition: opacity var(--transition);
  pointer-events: none;
}
.industry-card:hover {
  transform: translateY(-7px);
  box-shadow: var(--shadow-lg), 0 0 0 1.5px rgba(16,185,129,0.18),
              inset 0 1px 0 rgba(255,255,255,0.95);
}
.industry-card:hover::before { opacity: 1; }
.industry-icon { font-size: 2rem; margin-bottom: 1rem; display: inline-block; }
.industry-card h3 {
  font-family: var(--font-head);
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.6rem;
}
.industry-card p { font-size: 0.85rem; color: var(--text-secondary); line-height: 1.68; }
.industry-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--emerald-d);
  font-size: 0.8rem;
  font-weight: 600;
  margin-top: 1rem;
  text-decoration: none;
  transition: gap var(--transition);
}
.industry-card:hover .industry-link { gap: 0.75rem; }

/* ============================================================
   SECTION 9 - R&D
   ============================================================ */
.rnd-section {
  background: var(--bg-base);
  position: relative;
  overflow: hidden;
}
.rnd-section::before {
  content: '';
  position: absolute;
  top: -80px; right: -150px;
  width: 550px; height: 550px;
  background: radial-gradient(circle, rgba(217,119,6,0.04) 0%, transparent 68%);
  pointer-events: none;
}
.rnd-roadmap {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  margin-top: 3.5rem;
  position: relative;
}
.rnd-roadmap::before {
  content: '';
  position: absolute;
  top: 27px; left: 7%;
  width: 86%;
  height: 2px;
  background: linear-gradient(90deg, var(--emerald), var(--teal), var(--gold));
  z-index: 0;
  opacity: 0.35;
}
.rnd-phase {
  text-align: center;
  position: relative;
  z-index: 1;
  padding: 0 0.5rem;
}
.rnd-dot {
  width: 56px; height: 56px;
  border-radius: 50%;
  margin: 0 auto 1.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  background: var(--glass-bg-2);
  backdrop-filter: blur(12px);
  border: 2px solid rgba(255,255,255,0.9);
  box-shadow: var(--shadow-md);
  position: relative;
  z-index: 2;
  transition: all var(--transition);
}
.rnd-phase:nth-child(1) .rnd-dot { border-color: var(--emerald); box-shadow: 0 0 0 5px rgba(16,185,129,0.12), var(--shadow-sm); }
.rnd-phase:nth-child(2) .rnd-dot { border-color: var(--teal);    box-shadow: 0 0 0 5px rgba(6,214,160,0.12), var(--shadow-sm); }
.rnd-phase:nth-child(3) .rnd-dot { border-color: var(--gold);    box-shadow: 0 0 0 5px rgba(217,119,6,0.12), var(--shadow-sm); }
.rnd-phase:nth-child(4) .rnd-dot { border-color: rgba(217,119,6,0.4); box-shadow: var(--shadow-sm); }
.rnd-phase:hover .rnd-dot { transform: scale(1.15); box-shadow: var(--shadow-lg); }
.rnd-phase-label {
  font-size: 0.67rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--emerald-d);
  margin-bottom: 0.5rem;
}
.rnd-phase:nth-child(3) .rnd-phase-label,
.rnd-phase:nth-child(4) .rnd-phase-label { color: var(--gold); }
.rnd-phase h4 {
  font-family: var(--font-head);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}
.rnd-phase p { font-size: 0.78rem; color: var(--text-secondary); line-height: 1.58; }
.rnd-opportunities {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
  margin-top: 4rem;
}
.rnd-opp {
  background: var(--glass-bg-2);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(255,255,255,0.9);
  box-shadow: var(--shadow-sm), inset 0 1px 0 rgba(255,255,255,0.85);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  transition: all var(--transition);
}
.rnd-opp:hover {
  border-color: rgba(217,119,6,0.2);
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}
.rnd-opp-title {
  font-family: var(--font-head);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}
.rnd-opp p { font-size: 0.82rem; color: var(--text-secondary); line-height: 1.62; }
.rnd-opp-badge {
  display: inline-block;
  background: rgba(217,119,6,0.08);
  border: 1px solid rgba(217,119,6,0.18);
  color: var(--gold);
  padding: 0.2rem 0.6rem;
  border-radius: 4px;
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-top: 0.75rem;
}

/* ============================================================
   SECTION 10 - IMPACT
   ============================================================ */
.impact-section {
  background: var(--bg-soft);
  position: relative;
  overflow: hidden;
}
.impact-bg-text {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-family: var(--font-head);
  font-size: clamp(6rem, 15vw, 14rem);
  font-weight: 900;
  color: rgba(61,123,88,0.06);
  white-space: nowrap;
  pointer-events: none;
  user-select: none;
  letter-spacing: -0.05em;
}
.impact-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 1.25rem;
  margin-top: 3.5rem;
  position: relative;
  z-index: 1;
}
.impact-stat {
  text-align: center;
  padding: 2rem 1rem;
  background: var(--glass-bg-2);
  backdrop-filter: blur(20px) saturate(1.5);
  -webkit-backdrop-filter: blur(20px) saturate(1.5);
  border: 1px solid rgba(255,255,255,0.95);
  box-shadow: var(--shadow-md), inset 0 1px 0 rgba(255,255,255,0.85);
  border-radius: var(--radius-lg);
  transition: all var(--transition);
}
.impact-stat:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg), 0 0 0 1px rgba(16,185,129,0.14);
}
.impact-icon { font-size: 1.75rem; margin-bottom: 0.75rem; display: block; }
.impact-value {
  font-family: var(--font-head);
  font-size: 2rem;
  font-weight: 700;
  color: var(--emerald-d);
  line-height: 1;
  margin-bottom: 0.4rem;
}
.impact-label { font-size: 0.76rem; color: var(--text-muted); line-height: 1.45; }

/* ============================================================
   SECTION 11 - CONTACT
   ============================================================ */
.contact-section {
  background: linear-gradient(135deg, #F4F9F6 0%, #FFFFFF 50%, #F4F9F6 100%);
  position: relative;
  overflow: hidden;
  text-align: center;
}
.contact-section::before {
  content: '';
  position: absolute;
  bottom: -150px; right: -150px;
  width: 500px; height: 500px;
  background: radial-gradient(circle, rgba(61,123,88,0.09) 0%, transparent 65%);
  pointer-events: none;
}
.contact-section::after {
  content: '';
  position: absolute;
  top: -100px; left: -100px;
  width: 450px; height: 450px;
  background: radial-gradient(circle, rgba(46,112,112,0.07) 0%, transparent 65%);
  pointer-events: none;
}
.contact-content { position: relative; z-index: 1; }
.contact-title {
  font-family: var(--font-head);
  font-size: clamp(2rem, 4.5vw, 3.6rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  margin-bottom: 1.25rem;
}
.contact-title em {
  font-style: normal;
  background: linear-gradient(135deg, var(--emerald-d), var(--teal));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.contact-desc {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 520px;
  margin: 0 auto 3rem;
  line-height: 1.75;
}
.contact-options {
  display: flex;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 3.5rem;
}
.contact-option {
  background: var(--glass-bg-2);
  backdrop-filter: blur(20px) saturate(1.5);
  -webkit-backdrop-filter: blur(20px) saturate(1.5);
  border: 1px solid rgba(255,255,255,0.95);
  box-shadow: var(--shadow-md), inset 0 1px 0 rgba(255,255,255,0.9);
  border-radius: var(--radius-md);
  padding: 1.5rem 2rem;
  text-align: center;
  min-width: 155px;
  transition: all var(--transition);
  cursor: pointer;
  text-decoration: none;
}
.contact-option:hover {
  border-color: rgba(16,185,129,0.28);
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg), 0 0 0 1px rgba(16,185,129,0.12);
}
.contact-option-icon { font-size: 1.75rem; margin-bottom: 0.5rem; display: block; }
.contact-option-label {
  font-family: var(--font-head);
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.25rem;
}
.contact-option-desc { font-size: 0.74rem; color: var(--text-muted); }
.contact-direct-email {
  margin-top: 4rem;
  text-align: center;
}
.contact-direct-email a {
  display: inline-block;
  font-family: var(--font-head);
  font-size: 2.2rem;
  font-weight: 500;
  color: var(--navy);
  text-decoration: none;
  border-bottom: 2px solid var(--emerald);
  padding-bottom: 5px;
  transition: all var(--transition);
}
.contact-direct-email a:hover {
  color: var(--emerald);
  border-bottom-color: var(--teal);
  transform: translateY(-2px);
  text-shadow: 0 4px 15px rgba(61,123,88,0.2);
}

@media (max-width: 768px) {
  .contact-direct-email a {
    font-size: 1.5rem;
  }
}

/* ============================================================
   FOOTER
   ============================================================ */
footer {
  background: var(--bg-mid);
  padding: 3rem 2.5rem;
  border-top: 1px solid rgba(0,0,0,0.06);
}
.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1.5rem;
}
.footer-left-col {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 1.25rem;
}
.footer-right-col {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 1rem;
}
.footer-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}
.footer-logo img {
  height: 36px;
  width: auto;
  opacity: 0.75;
}
.footer-logo-text {
  font-family: var(--font-head);
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text-secondary);
}
.footer-tagline {
  font-size: 0.72rem;
  color: var(--text-muted);
  letter-spacing: 0.07em;
  text-transform: uppercase;
}
.footer-links {
  display: flex;
  gap: 2rem;
  list-style: none;
  flex-wrap: wrap;
}
.footer-links a {
  font-size: 0.82rem;
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.3s;
  letter-spacing: 0.02em;
}
.footer-links a:hover { color: var(--emerald-d); }
.footer-address {
  max-width: 420px;
  font-style: normal;
  font-size: 0.72rem;
  color: var(--text-light);
  line-height: 1.65;
  text-align: left;
}
.footer-copy {
  font-size: 0.75rem;
  color: var(--text-light);
  text-align: right;
  line-height: 1.7;
}

/* ============================================================
   ANIMATIONS
   ============================================================ */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(28px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%       { opacity: 0.5; transform: scale(0.82); }
}
@keyframes scrollLine {
  0%   { transform: scaleY(0); transform-origin: top; }
  50%  { transform: scaleY(1); transform-origin: top; }
  50.001% { transform-origin: bottom; }
  100% { transform: scaleY(0); transform-origin: bottom; }
}
@keyframes shimmer {
  0%   { background-position: -200% center; }
  100% { background-position: 200% center; }
}

/* Reveal */
.reveal {
  opacity: 0;
  transform: translateY(36px);
  transition: opacity 0.65s ease, transform 0.65s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}
.reveal-delay-1 { transition-delay: 0.10s; }
.reveal-delay-2 { transition-delay: 0.18s; }
.reveal-delay-3 { transition-delay: 0.26s; }
.reveal-delay-4 { transition-delay: 0.34s; }
.reveal-delay-5 { transition-delay: 0.42s; }

/* Particle */
@keyframes particleFloat {
  0%   { transform: translateY(0) translateX(0); opacity: 0; }
  10%  { opacity: 1; }
  90%  { opacity: 0.4; }
  100% { transform: translateY(-110vh) translateX(30px); opacity: 0; }
}

/* ============================================================
   MOBILE MENU
   ============================================================ */
.mobile-menu {
  display: none;
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(255,255,255,0.98);
  backdrop-filter: blur(24px);
  z-index: 999;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2rem;
}
.mobile-menu.open { display: flex; }
.mobile-menu a {
  font-family: var(--font-head);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  text-decoration: none;
  transition: color 0.3s;
}
.mobile-menu a:hover { color: var(--emerald-d); }
.mobile-close {
  position: absolute;
  top: 1.5rem; right: 1.5rem;
  font-size: 2rem;
  color: var(--text-muted);
  cursor: pointer;
  background: none;
  border: none;
  line-height: 1;
  transition: color 0.3s;
}
.mobile-close:hover { color: var(--text-primary); }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 1024px) {
  .tech-layout       { grid-template-columns: 1fr; gap: 3rem; }
  .hero-explorer     { grid-template-columns: repeat(2, minmax(0, 1fr)); max-width: 860px; }
  .metrics-grid      { grid-template-columns: repeat(2, 1fr); }
  .impact-grid       { grid-template-columns: repeat(3, 1fr); }
  .rnd-roadmap       { grid-template-columns: repeat(2, 1fr); gap: 2rem; }
  .rnd-roadmap::before { display: none; }
}
@media (max-width: 768px) {
  .nav-links         { display: none; }
  .nav-hamburger     { display: flex; }
  section            { padding: 4rem 1.25rem; }
  .hero-explorer     { grid-template-columns: 1fr; }
  .problem-grid      { grid-template-columns: 1fr; }
  .metrics-grid      { grid-template-columns: repeat(2, 1fr); }
  .materials-grid    { grid-template-columns: repeat(3, 1fr); }
  .why-grid          { grid-template-columns: 1fr; }
  .industries-scroll { grid-template-columns: 1fr; }
  .rnd-roadmap       { grid-template-columns: 1fr; }
  .rnd-opportunities { grid-template-columns: 1fr; }
  .impact-grid       { grid-template-columns: repeat(2, 1fr); }
  .hero-stats        { gap: 1.5rem; }
  .stream-timeline   { gap: 1rem; }
  .stream-node::after { display: none; }
  .contact-options   { flex-direction: column; align-items: center; }
  .contact-form-row  { flex-direction: column; }
  .footer-inner      { flex-direction: column; text-align: center; gap: 2rem; }
  .footer-left-col   { flex-direction: column; text-align: center; gap: 1rem; }
  .footer-right-col  { align-items: center; }
  .footer-address    { text-align: center; }
  .footer-copy       { text-align: center; }
}
@media (max-width: 480px) {
  .materials-grid { grid-template-columns: repeat(2, 1fr); }
  .impact-grid    { grid-template-columns: 1fr 1fr; }
}

/* ============================================================
   CUSTOM CURSOR & PREMIUM HOVERS
   ============================================================ */
body {
  cursor: none;
}

a, button, input, textarea, select, .stream-tab, .contact-option, .explorer-link, .mobile-close {
  cursor: none;
}

.custom-cursor {
  position: fixed;
  top: 0; left: 0;
  width: 6px;
  height: 6px;
  background-color: var(--emerald);
  border-radius: 50%;
  pointer-events: none;
  z-index: 10000;
  transform: translate(-50%, -50%);
  transition: width 0.2s, height 0.2s, background-color 0.2s;
}

.cursor-follower {
  position: fixed;
  top: 0; left: 0;
  width: 40px;
  height: 40px;
  pointer-events: none;
  z-index: 9999;
  transform: translate(-50%, -50%);
  transition: width 0.3s, height 0.3s;
}

.cursor-ring {
  width: 100%;
  height: 100%;
  animation: rotateRing 6s linear infinite;
  transform-origin: center;
}

@keyframes rotateRing {
  100% { transform: rotate(360deg); }
}

/* Hover States */
.cursor-hover .custom-cursor {
  width: 12px;
  height: 12px;
  background-color: var(--gold);
}

.cursor-hover .cursor-follower {
  width: 60px;
  height: 60px;
}

/* Premium Button Enhancements */
.btn-primary, .btn-outline {
  position: relative;
  overflow: hidden;
  transition: all 0.4s cubic-bezier(0.25, 1, 0.5, 1);
}

.btn-primary:hover {
  transform: translateY(-4px) scale(1.02);
  box-shadow: 0 20px 40px rgba(6, 214, 160, 0.3);
  letter-spacing: 0.05em;
}

.btn-outline:hover {
  transform: translateY(-4px) scale(1.02);
  background: var(--navy);
  color: #fff;
  border-color: var(--navy);
  box-shadow: 0 20px 40px rgba(28, 40, 32, 0.2);
  letter-spacing: 0.05em;
}

/* Hide custom cursor on very small screens to avoid interfering with touch */
@media (max-width: 768px) {
  body, a, button, input, textarea, select, .stream-tab, .contact-option, .explorer-link, .mobile-close {
    cursor: auto;
  }
  .custom-cursor, .cursor-follower {
    display: none;
  }
}