/* ============================================
   EQUILION - BOLD COLOR-CODED PRODUCT SYSTEM
   ============================================ */

:root {
  --teal-deep: #0A3D62;
  --teal: #2184e7;
  --electric-blue: #2563EB;
  --cyan: #0EA5E9;
  --soft-aqua: #38BDF8;
  --mint: #7DD3FC;
  --turquoise: #60A5FA;
  --pale-blue: #EFF6FF;
  --pale-aqua: #F0F9FF;
  --accent: #08658A;
  --deep-blue: #07536D;
  --soft-blue: #DCEFF5;
  --header-bg: rgba(255, 255, 255, 0.95);
  --text: #17343D;
  --frame-padding: 2rem;
  --white: #FFFFFF;
  --text-primary: #0F172A;
  --text-secondary: #334155;
  --text-muted: #64748B;
  --border: #DBEAFE;
  --shadow: 0 8px 30px -10px rgba(37, 99, 235, 0.12);
  --shadow-hover: 0 20px 45px -12px rgba(37, 99, 235, 0.22);
  --radius: 20px;
  --transition: all 0.4s cubic-bezier(0.23, 1, 0.32, 1);
  --font: "Proxima Nova", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --gradient-primary: linear-gradient(135deg, #0A3D62 0%, #2563EB 100%);
  --gradient-soft: linear-gradient(135deg, #EFF6FF 0%, #F0F9FF 100%);
}

.section, .hero {
  position: relative;
}
.section::before, .hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(45deg, rgba(75, 145, 210, 0.12) 0, rgba(75, 145, 210, 0.12) 1px, transparent 1px, transparent 40px),
    repeating-linear-gradient(-45deg, rgba(75, 145, 210, 0.12) 0, rgba(75, 145, 210, 0.12) 1px, transparent 1px, transparent 40px);
  pointer-events: none;
  z-index: 0;
  opacity: 0.7;
}
.section > *, .hero > * {
  position: relative;
  z-index: 1;
}
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  background: var(--warm-ivory);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
img { display: block; max-width: 100%; height: auto; }

/* Reveal */
.reveal { opacity: 0; transform: translateY(30px); transition: opacity 0.8s ease, transform 0.8s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }

/* Mobile nav */
.mobile-nav {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: var(--white);
  z-index: 2000;
  transform: translateX(100%);
  transition: transform 0.35s ease;
}
.mobile-nav.open { transform: translateX(0); }
.mobile-nav-inner { padding: 4rem 1.5rem 2rem; height: 100%; overflow-y: auto; }
.mobile-nav-list { display: flex; flex-direction: column; gap: 0.5rem; }
.mobile-nav-link {
  display: block;
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-secondary);
  padding: 0.85rem 1rem;
  border-radius: 8px;
  transition: var(--transition);
}
.mobile-nav-link:hover, .mobile-nav-link.mobile-nav-link-active {
  color: var(--teal-deep);
  background: var(--pale-blue);
}
.mobile-enquire-btn {
  margin-top: 1rem;
  text-align: center;
  background: var(--teal-deep);
  color: #fff;
}

/* ============================================
   HERO
   ============================================ */
.hero {
  position: relative;
  padding: 150px 0 180px;
  overflow: hidden;
  background: #F5F9FE;
  background-image:
    radial-gradient(circle at 50% 50%, rgba(37, 99, 235, 0.06) 0%, transparent 60%),
    linear-gradient(135deg, #F5F9FE 0%, #EEF5FC 100%);
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(45deg, rgba(37, 99, 235, 0.06) 0, rgba(37, 99, 235, 0.06) 1px, transparent 1px, transparent 40px),
    repeating-linear-gradient(-45deg, rgba(37, 99, 235, 0.06) 0, rgba(37, 99, 235, 0.06) 1px, transparent 1px, transparent 40px),
    repeating-linear-gradient(0deg, rgba(37, 99, 235, 0.04) 0, rgba(37, 99, 235, 0.04) 1px, transparent 1px, transparent 60px),
    repeating-linear-gradient(90deg, rgba(37, 99, 235, 0.04) 0, rgba(37, 99, 235, 0.04) 1px, transparent 1px, transparent 60px);
  pointer-events: none;
  z-index: 0;
}
.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle, rgba(37, 99, 235, 0.15) 1px, transparent 1.5px);
  background-size: 80px 80px;
  opacity: 0.5;
  pointer-events: none;
  z-index: 0;
  animation: particleDrift 60s linear infinite;
}
@keyframes particleDrift {
  0% { background-position: 0 0; }
  100% { background-position: 80px 80px; }
}
.hero-inner {
  position: relative;
  z-index: 1;
  max-width: 1460px;
  margin: 0 auto;
  padding: 0 40px;
}
.hero-text { max-width: 100%; }
.hero-heading {
  font-size: clamp(36px, 5.5vw, 68px);
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: -2px;
  margin-bottom: 20px;
  color: #111827;
  text-transform: uppercase;
  opacity: 0;
  transform: translateY(20px);
  animation: heroFadeUp 0.9s ease forwards 0.2s;
}
@keyframes heroFadeUp {
  to { opacity: 1; transform: translateY(0); }
}
.hero-desc {
  font-size: 21px;
  color: #475569;
  line-height: 1.65;
  max-width: 850px;
  margin: 0 0 0;
  opacity: 0;
  animation: heroFadeUp 0.9s ease forwards 0.5s;
}
.hero-desc strong { font-weight: 600; }

/* Category pills */
.family-nav-cards {
  display: flex;
  gap: 0.6rem;
  margin-bottom: 40px;
  opacity: 0;
  animation: heroFadeUp 0.9s ease forwards 0s;
}
.family-card {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  height: 44px;
  padding: 0 1.25rem;
  border-radius: 999px;
  border: 1px solid #DBEAFE;
  background: #FFFFFF;
  transition: all 0.3s ease;
  text-decoration: none;
  color: inherit;
  box-shadow: 0 2px 8px rgba(37, 99, 235, 0.06);
  font-size: 15px;
  font-weight: 600;
}
.family-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(37, 99, 235, 0.12);
}
.family-solar { color: #2563EB; }
.family-hydro { color: #0891B2; border-color: #A5F3FC; }
.family-icon { font-size: 1rem; }
.family-name { font-size: 14px; font-weight: 600; }

@media (max-width: 1024px) {
  .hero { padding: 100px 0 120px; }
  .hero-heading { font-size: clamp(32px, 6vw, 56px); letter-spacing: -1.5px; }
  .hero-inner { padding: 0 24px; }
}
@media (max-width: 640px) {
  .hero { padding: 70px 0 90px; }
  .hero-heading { font-size: clamp(30px, 8vw, 42px); letter-spacing: -1px; }
  .hero-desc { font-size: 16px; }
  .hero-inner { padding: 0 20px; }
  .family-nav-cards { flex-wrap: wrap; }
}

/* ============================================
   SECTIONS
   ============================================ */
.section { padding: 7rem var(--frame-padding, 2rem); }
.section-inner { max-width: 1200px; margin: 0 auto; padding: 0 1.5rem; }
.section-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 3rem;
}
.section-icon {
  font-size: 3rem;
  flex-shrink: 0;
  filter: drop-shadow(0 4px 12px rgba(37, 99, 235, 0.25));
  transition: var(--transition);
}
.section-icon:hover { transform: rotate(15deg) scale(1.1); }
.section-title .section-heading {
  font-size: clamp(40px, 5vw, 52px);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
}
.section-description {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 700px;
  margin: 0;
}
.hydro-header { align-items: flex-start; }
.hydro-icon { margin-top: 0.2rem; }

.solar-section { background: var(--pale-blue); }
.hydro-section { background: var(--pale-aqua); }

/* ============================================
   PRODUCT CARDS
   ============================================ */
.product-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
}
.product-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  box-shadow: 0 4px 16px -8px rgba(37, 99, 235, 0.08);
}
.product-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(37, 99, 235, 0.25);
}
.product-card .card-top {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 1.5rem 1.5rem 1rem;
}
.product-number {
  font-size: 3rem;
  font-weight: 800;
  line-height: 1;
  opacity: 0.08;
  font-feature-settings: "lnum" 1;
}
.product-label {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
}
.card-name {
  font-size: clamp(22px, 2.5vw, 30px);
  font-weight: 700;
  color: var(--text-primary);
  margin: 0 1.5rem 0.35rem;
  line-height: 1.2;
}
.card-tech {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin: 0 1.5rem 1.25rem;
  display: block;
}
.feature-area {
  padding: 0 1.5rem 1rem;
  border-radius: 0 0 var(--radius) var(--radius);
}
.feature-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.feature-list li {
  font-size: 0.85rem;
  font-weight: 500;
  padding: 0.4rem 0.85rem;
  border-radius: 6px;
  white-space: nowrap;
  transition: var(--transition);
}

/* Color-coded accents per product */
.card-01 { border-top: 4px solid var(--teal); }
.card-01 .product-label { color: var(--teal); }
.card-01 .feature-list li {
  background: rgba(18, 110, 130, 0.08);
  color: var(--teal);
  border: 1px solid rgba(18, 110, 130, 0.15);
}
.card-01 .feature-list li:hover { background: var(--teal); color: var(--white); }

.card-02 { border-top: 4px solid var(--electric-blue); }
.card-02 .product-label { color: var(--electric-blue); }
.card-02 .feature-list li {
  background: rgba(59, 130, 246, 0.08);
  color: var(--electric-blue);
  border: 1px solid rgba(59, 130, 246, 0.15);
}
.card-02 .feature-list li:hover { background: var(--electric-blue); color: var(--white); }

.card-03 { border-top: 4px solid var(--cyan); }
.card-03 .product-label { color: var(--cyan); }
.card-03 .feature-list li {
  background: rgba(6, 182, 212, 0.08);
  color: var(--cyan);
  border: 1px solid rgba(6, 182, 212, 0.15);
}
.card-03 .feature-list li:hover { background: var(--cyan); color: var(--white); }

.card-04 { border-top: 4px solid var(--teal-deep); }
.card-04 .product-label { color: var(--teal-deep); }
.card-04 .feature-list li {
  background: rgba(11, 79, 92, 0.08);
  color: var(--teal-deep);
  border: 1px solid rgba(11, 79, 92, 0.15);
}
.card-04 .feature-list li:hover { background: var(--teal-deep); color: var(--white); }

.card-hydro-01 { border-top: 4px solid var(--soft-aqua); }
.card-hydro-01 .product-label { color: var(--soft-aqua); }
.card-hydro-01 .feature-list li {
  background: rgba(78, 205, 196, 0.08);
  color: var(--soft-aqua);
  border: 1px solid rgba(78, 205, 196, 0.15);
}
.card-hydro-01 .feature-list li:hover { background: var(--soft-aqua); color: var(--white); }

.card-hydro-02 { border-top: 4px solid var(--mint); }
.card-hydro-02 .product-label { color: var(--mint); }
.card-hydro-02 .feature-list li {
  background: rgba(168, 230, 207, 0.08);
  color: var(--text-secondary);
  border: 1px solid rgba(168, 230, 207, 0.15);
}
.card-hydro-02 .feature-list li:hover { background: var(--mint); color: var(--text-primary); }

/* Ingredient block */
.ingredient-block {
  padding: 1rem 1.5rem 1.5rem;
  border-top: 1px solid var(--border);
}
.block-label {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-muted);
  display: block;
  margin-bottom: 0.5rem;
}
.product-ingredients {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ============================================
   COMPARISON
   ============================================ */
.comparison-section { background: var(--white); }
.section-heading {
  font-size: clamp(40px, 5vw, 52px);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.02em;
  text-align: center;
  margin-bottom: 3.5rem;
  color: var(--text-primary);
}
.category-block {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin: 2.5rem 0 1rem;
  padding-left: 1rem;
  border-left: 4px solid transparent;
}
.category-solar { border-left-color: var(--teal-deep); }
.category-hydro { border-left-color: var(--cyan); }
.cat-icon { font-size: 1.5rem; }
.cat-name {
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-primary);
}
.category-solar .cat-name { color: var(--teal-deep); }
.category-hydro .cat-name { color: var(--cyan); }

.comparison-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  font-size: 0.95rem;
}
.comparison-table th {
  position: sticky;
  top: 0;
  background: var(--white);
  color: var(--text-primary);
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 1.25rem 1.5rem;
  text-align: left;
  border-bottom: 2px solid var(--border);
  z-index: 2;
}
.table-solar th { border-top: 3px solid var(--teal-deep); }
.table-hydro th { border-top: 3px solid var(--cyan); }
.table-solar th { color: var(--teal-deep); }
.table-hydro th { color: var(--cyan); }
.comparison-table td {
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}
.comparison-table tbody tr:last-child td { border-bottom: none; }
.comparison-table tbody tr:nth-child(even) td { background: var(--warm-ivory); }
.comparison-table tbody tr:hover td { background: var(--pale-blue); transition: var(--transition); }
.table-name { display: block; font-weight: 700; color: var(--text-primary); }
.table-tech { display: block; font-size: 0.82rem; color: var(--text-muted); margin-top: 0.2rem; }
.feat-chip {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.3rem 0.75rem;
  border-radius: 6px;
  margin: 0 0.3rem 0.3rem 0;
}
.table-solar .feat-chip {
  background: rgba(11, 79, 92, 0.08);
  color: var(--teal-deep);
  border: 1px solid rgba(11, 79, 92, 0.12);
}
.table-hydro .feat-chip {
  background: rgba(6, 182, 212, 0.08);
  color: var(--cyan);
  border: 1px solid rgba(6, 182, 212, 0.12);
}
.excl-chip {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.3rem 0.75rem;
  border-radius: 6px;
  margin: 0 0.3rem 0.3rem 0;
  background: rgba(239, 68, 68, 0.06);
  color: #B91C1C;
  border: 1px solid rgba(239, 68, 68, 0.12);
}

/* Mobile stacked spec cards */
.mobile-specs { display: none; margin-top: 1rem; }
.spec-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  margin-bottom: 1rem;
  transition: var(--transition);
}
.spec-card:hover { box-shadow: var(--shadow); border-color: var(--teal-deep); }
.spec-head {
  display: flex;
  justify-content: space-between;
  align-items: start;
  margin-bottom: 0.75rem;
}
.spec-name { font-weight: 700; color: var(--text-primary); }
.spec-tech { font-size: 0.82rem; color: var(--text-muted); margin-top: 0.15rem; }
.spec-key {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-secondary);
  display: block;
  margin-bottom: 0.75rem;
}
.spec-features {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 0.5rem;
}
.spec-exclusions {
  font-size: 0.88rem;
  color: var(--text-secondary);
  padding-top: 0.5rem;
  border-top: 1px solid var(--border);
}

/* WhatsApp floating button */
.whatsapp-button {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  width: 56px;
  height: 56px;
  background: #25D366;
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 16px rgba(37, 211, 102, 0.35);
  z-index: 1000;
  transition: var(--transition);
}
.whatsapp-button:hover { transform: scale(1.08); background: #1EB855; }
.whatsapp-button svg { width: 26px; height: 26px; fill: #fff; }

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 900px) {
  .nav { display: none; }
  .menu-toggle { display: block; }
  .footer-main { grid-template-columns: 1fr; gap: 2rem; }
  .footer-nav { grid-template-columns: 1fr; gap: 2rem; }
  .footer-bottom { flex-direction: column; gap: 1rem; align-items: flex-start; text-align: left; }
  .comparison-table { font-size: 0.85rem; }
  .comparison-table th, .comparison-table td { padding: 0.9rem 1.1rem; }
}
@media (max-width: 640px) {
  .hero { padding: 6rem 0 5rem; }
  .hero-heading { font-size: clamp(36px, 8vw, 48px); }
  .section { padding: 4rem 0; }
  .section-header { flex-direction: column; gap: 0.75rem; align-items: flex-start; }
  .section-title .section-heading { font-size: clamp(32px, 8vw, 42px); }
  .product-grid { grid-template-columns: 1fr; }
  .comparison-table { display: none; }
  .mobile-specs { display: block; }
  .section-heading { font-size: clamp(32px, 8vw, 42px); }
  .family-nav-cards { grid-template-columns: 1fr; }
}