/* ═══════════════════════════════════════════════════════════════════
   DENSHI RYOKU — Main Stylesheet
   Corporate battery & energy-storage website
   ═══════════════════════════════════════════════════════════════════ */

/* ── Design Tokens ─────────────────────────────────────────────── */
:root {
  /* Colours */
  --clr-primary: #1a6bff;
  --clr-primary-dark: #1457d6;
  --clr-primary-light: #e8f0fe;
  --clr-primary-glow: rgba(26, 107, 255, 0.18);

  --clr-dark: #0c1829;
  --clr-dark-alt: #14233a;
  --clr-text: #1e2d3d;
  --clr-text-mid: #516273;
  --clr-text-light: #7a8da0;

  --clr-bg: #f5f7fb;
  --clr-bg-alt: #f0f3f8;
  --clr-white: #ffffff;
  --clr-border: #e2e8f0;
  --clr-border-light: #edf2f7;

  --clr-green: #10b981;
  --clr-amber: #f59e0b;

  /* Typography */
  --ff-body: "Inter", "Segoe UI", Roboto, Arial, sans-serif;

  /* Spacing */
  --max-w: 1280px;
  --section-px: 2rem;
  --section-py: 5rem;

  /* Transitions */
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --dur: 0.25s;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 14px rgba(0, 0, 0, 0.07);
  --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.09);
  --shadow-xl: 0 20px 50px rgba(15, 34, 54, 0.12);

  /* Radius */
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --radius-pill: 999px;
}

/* ── Reset ─────────────────────────────────────────────────────── */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--ff-body);
  color: var(--clr-text);
  background: var(--clr-bg);
  line-height: 1.6;
}

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

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

button {
  font: inherit;
  border: none;
  background: none;
  cursor: pointer;
  color: inherit;
}

ul {
  list-style: none;
}

/* ── Announcement Bar ──────────────────────────────────────────── */
.announcement-bar {
  width: 100%;
  background: linear-gradient(135deg, var(--clr-dark) 0%, #1a2f4a 100%);
  color: var(--clr-white);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0.6rem 1rem;
}

.announcement-bar span {
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  text-align: center;
  line-height: 1.4;
  opacity: 0.9;
}

/* ── Header ────────────────────────────────────────────────────── */
.site-header {
  background: var(--clr-white);
  border-bottom: 1px solid var(--clr-border);
  position: sticky;
  top: 0;
  z-index: 1000;
  transition: box-shadow var(--dur) var(--ease);
}

.site-header.scrolled {
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.06);
}

.header-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  min-height: 72px;
  padding: 0 var(--section-px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

/* Brand */
.brand {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  text-decoration: none;
  color: var(--clr-dark-alt);
  font-weight: 700;
  letter-spacing: 0.1em;
  white-space: nowrap;
  flex-shrink: 0;
}

.brand-logo {
  display: block;
  height: 86px;
  width: auto;
  object-fit: contain;
  flex-shrink: 0;
}

.brand-name {
  font-size: 0.92rem;
}

/* Nav */
.main-nav {
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

.main-nav > a,
.nav-dropdown-toggle {
  padding: 0.5rem 0.75rem;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--clr-text);
  border-radius: var(--radius-sm);
  transition: color var(--dur) var(--ease), background var(--dur) var(--ease);
  white-space: nowrap;
}

.main-nav > a:hover,
.main-nav > a:focus-visible,
.nav-dropdown-toggle:hover,
.nav-dropdown-toggle:focus-visible {
  color: var(--clr-primary);
  background: var(--clr-primary-light);
}

/* Dropdown */
.nav-dropdown {
  position: relative;
}

.dropdown-arrow {
  font-size: 0.7rem;
  margin-left: 0.15rem;
  opacity: 0.5;
  transition: transform var(--dur) var(--ease);
}

.nav-dropdown-menu {
  position: absolute;
  top: calc(100% + 0.35rem);
  left: 50%;
  transform: translateX(-50%) translateY(6px);
  min-width: 240px;
  background: var(--clr-white);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: 0.5rem;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease);
  z-index: 100;
}

/* Hover bridge: invisible area between button and dropdown to prevent flicker */
.nav-dropdown-menu::before {
  content: "";
  position: absolute;
  top: -0.5rem;
  left: 0;
  right: 0;
  height: 0.5rem;
}

.nav-dropdown.open .nav-dropdown-menu {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}

/* Desktop hover-to-open (only on devices with hover capability and wider screens) */
@media (hover: hover) and (min-width: 861px) {
  .nav-dropdown:hover .nav-dropdown-menu {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateX(-50%) translateY(0);
  }

  .nav-dropdown:hover .dropdown-arrow {
    transform: rotate(180deg);
  }
}

.nav-dropdown.open .dropdown-arrow {
  transform: rotate(180deg);
}

.nav-dropdown-menu a {
  display: block;
  padding: 0.6rem 0.85rem;
  font-size: 0.86rem;
  font-weight: 450;
  color: var(--clr-text);
  border-radius: var(--radius-sm);
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}

.nav-dropdown-menu a:hover,
.nav-dropdown-menu a:focus-visible {
  background: var(--clr-primary-light);
  color: var(--clr-primary);
}

/* Quote Button */
.quote-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  background: var(--clr-primary);
  color: var(--clr-white);
  padding: 0.6rem 1.2rem;
  border-radius: var(--radius-pill);
  font-size: 0.86rem;
  font-weight: 600;
  white-space: nowrap;
  flex-shrink: 0;
  transition: background var(--dur) var(--ease), transform var(--dur) var(--ease),
    box-shadow var(--dur) var(--ease);
}

.quote-btn:hover,
.quote-btn:focus-visible {
  background: var(--clr-primary-dark);
  transform: translateY(-1px);
  box-shadow: 0 6px 18px var(--clr-primary-glow);
}

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 0.5rem;
  z-index: 1100;
}

.hamburger-line {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--clr-dark-alt);
  border-radius: 2px;
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}

.hamburger.active .hamburger-line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.hamburger.active .hamburger-line:nth-child(2) {
  opacity: 0;
}
.hamburger.active .hamburger-line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ── Hero Section ──────────────────────────────────────────────── */
.hero-section {
  position: relative;
  background: linear-gradient(170deg, #f8fafd 0%, var(--clr-bg) 50%, #eef3fa 100%);
  padding: 5rem var(--section-px) 6rem;
  overflow: hidden;
}

.hero-bg-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(26, 107, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(26, 107, 255, 0.04) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 40%, black 30%, transparent 80%);
  pointer-events: none;
}

.hero-content {
  max-width: var(--max-w);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 4rem;
  align-items: center;
  position: relative;
}

.hero-copy {
  max-width: 600px;
}

.hero-label {
  margin: 0 0 1rem;
  color: var(--clr-primary);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
}

.hero-copy h1 {
  margin: 0 0 1.2rem;
  color: var(--clr-dark);
  font-size: clamp(2.6rem, 4.5vw, 3.8rem);
  line-height: 1.06;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.hero-text {
  margin: 0 0 2.2rem;
  color: var(--clr-text-mid);
  font-size: 1.05rem;
  line-height: 1.75;
  max-width: 520px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.85rem 1.5rem;
  border-radius: var(--radius-pill);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.92rem;
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease),
    background var(--dur) var(--ease), color var(--dur) var(--ease);
}

.btn:hover,
.btn:focus-visible {
  transform: translateY(-2px);
}

.btn-primary {
  background: var(--clr-primary);
  color: var(--clr-white);
  box-shadow: 0 8px 20px var(--clr-primary-glow);
}

.btn-primary:hover,
.btn-primary:focus-visible {
  background: var(--clr-primary-dark);
  box-shadow: 0 12px 28px rgba(26, 107, 255, 0.28);
}

.btn-secondary {
  color: var(--clr-primary);
  background: transparent;
  border: 1.5px solid var(--clr-border);
}

.btn-secondary:hover,
.btn-secondary:focus-visible {
  background: var(--clr-primary-light);
  border-color: var(--clr-primary);
}

/* Hero Visual */
.hero-visual {
  display: flex;
  justify-content: center;
}

.visual-card {
  position: relative;
  width: 100%;
  max-width: 480px;
  min-height: 400px;
  border-radius: var(--radius-lg);
  background: linear-gradient(145deg, var(--clr-white) 0%, #eef4fb 100%);
  border: 1px solid var(--clr-border);
  box-shadow: var(--shadow-xl);
  overflow: hidden;
}

.visual-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(26, 107, 255, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(26, 107, 255, 0.06) 1px, transparent 1px);
  background-size: 28px 28px;
  mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.6), transparent 85%);
}

.visual-orb {
  position: absolute;
  top: 1.5rem;
  right: 1.5rem;
  width: 100px;
  height: 100px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--clr-primary-glow), rgba(26, 107, 255, 0.02));
  border: 1px solid rgba(26, 107, 255, 0.12);
  animation: pulse-orb 4s ease-in-out infinite;
}

.visual-orb-sm {
  top: auto;
  right: auto;
  bottom: 9rem;
  left: 1.5rem;
  width: 60px;
  height: 60px;
  animation-delay: -2s;
}

@keyframes pulse-orb {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.08); opacity: 0.7; }
}

.visual-line {
  position: absolute;
  height: 2px;
  background: linear-gradient(90deg, transparent, rgba(26, 107, 255, 0.3), transparent);
}

.line-one {
  top: 36%;
  left: 10%;
  width: 75%;
  transform: rotate(-8deg);
  animation: line-glow 3s ease-in-out infinite;
}

.line-two {
  top: 56%;
  left: 15%;
  width: 60%;
  transform: rotate(8deg);
  animation: line-glow 3s ease-in-out infinite 1.5s;
}

@keyframes line-glow {
  0%, 100% { opacity: 0.4; }
  50% { opacity: 1; }
}

.visual-battery {
  position: absolute;
  left: 50%;
  bottom: 2.5rem;
  transform: translateX(-50%);
  width: 220px;
  height: 120px;
  border: 1px solid rgba(20, 35, 58, 0.14);
  border-radius: 18px;
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.96), rgba(238, 244, 251, 0.96));
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--clr-dark-alt);
  font-weight: 600;
  font-size: 0.85rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  overflow: hidden;
}

.battery-charge {
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--clr-green), var(--clr-primary));
  border-radius: 0 0 18px 18px;
}

.visual-battery::after {
  content: "";
  position: absolute;
  right: -10px;
  top: 38px;
  width: 10px;
  height: 44px;
  border-radius: 0 6px 6px 0;
  background: rgba(26, 107, 255, 0.2);
}

.visual-stats {
  position: absolute;
  top: 1.5rem;
  left: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
}

.vs-row {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--clr-text-mid);
  letter-spacing: 0.02em;
}

.vs-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
}

.vs-dot.green {
  background: var(--clr-green);
  box-shadow: 0 0 6px rgba(16, 185, 129, 0.5);
}
.vs-dot.blue {
  background: var(--clr-primary);
  box-shadow: 0 0 6px var(--clr-primary-glow);
}
.vs-dot.amber {
  background: var(--clr-amber);
  box-shadow: 0 0 6px rgba(245, 158, 11, 0.5);
}

/* ── Stats Bar ─────────────────────────────────────────────────── */
.stats-bar {
  background: var(--clr-dark);
  padding: 0;
}

.stats-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2.2rem var(--section-px);
  gap: 0;
}

.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.3rem;
  flex: 1;
  text-align: center;
}

.stat-number {
  font-size: 2rem;
  font-weight: 800;
  color: var(--clr-white);
  letter-spacing: -0.02em;
}

.stat-label {
  font-size: 0.8rem;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.55);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.stat-divider {
  width: 1px;
  height: 40px;
  background: rgba(255, 255, 255, 0.12);
  flex-shrink: 0;
}

/* ── Section Shared ────────────────────────────────────────────── */
.section-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--section-px);
}

.section-header {
  text-align: center;
  margin-bottom: 3.5rem;
}

.section-tag {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--clr-primary);
  margin-bottom: 0.75rem;
}

.section-header h2 {
  font-size: clamp(1.8rem, 3vw, 2.6rem);
  font-weight: 800;
  color: var(--clr-dark);
  letter-spacing: -0.02em;
  line-height: 1.15;
  margin-bottom: 1rem;
}

.section-subtitle {
  font-size: 1.02rem;
  color: var(--clr-text-mid);
  max-width: 620px;
  margin: 0 auto;
  line-height: 1.7;
}

/* ── Products Section ──────────────────────────────────────────── */
.products-section {
  padding: var(--section-py) 0;
  background: var(--clr-white);
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.4rem;
}

.product-card {
  display: flex;
  flex-direction: column;
  background: var(--clr-white);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  text-decoration: none;
  color: var(--clr-text);
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease),
    border-color var(--dur) var(--ease);
}

.product-card:hover,
.product-card:focus-visible {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--clr-primary);
}

.product-img-wrap {
  background: var(--clr-bg-alt);
  padding: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  aspect-ratio: 4 / 3;
  overflow: hidden;
}

.product-img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: var(--radius-sm);
  transition: transform 0.4s var(--ease);
}

.product-card:hover .product-img-wrap img {
  transform: scale(1.04);
}

.product-info {
  padding: 1.2rem 1.3rem 1.4rem;
}

.product-info h3 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--clr-dark-alt);
  margin-bottom: 0.35rem;
  letter-spacing: -0.01em;
}

.product-info p {
  font-size: 0.82rem;
  color: var(--clr-text-mid);
  line-height: 1.5;
}

/* ── Features Section ──────────────────────────────────────────── */
.features-section {
  padding: var(--section-py) 0;
  background: var(--clr-bg);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

.feature-card {
  background: var(--clr-white);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-md);
  padding: 2rem 1.6rem 2.2rem;
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.feature-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.feature-icon {
  font-size: 1.8rem;
  margin-bottom: 1rem;
  width: 52px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--clr-primary-light);
  border-radius: var(--radius-sm);
}

.feature-card h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--clr-dark-alt);
  margin-bottom: 0.6rem;
}

.feature-card p {
  font-size: 0.88rem;
  color: var(--clr-text-mid);
  line-height: 1.65;
}

/* ── CTA Section ───────────────────────────────────────────────── */
.cta-section {
  padding: var(--section-py) var(--section-px);
  background: linear-gradient(135deg, var(--clr-dark) 0%, #162d4a 50%, #1a3a5c 100%);
  text-align: center;
}

.cta-inner {
  max-width: 680px;
  margin: 0 auto;
}

.cta-inner h2 {
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 800;
  color: var(--clr-white);
  margin-bottom: 1rem;
  letter-spacing: -0.01em;
}

.cta-inner p {
  font-size: 1.02rem;
  color: rgba(255, 255, 255, 0.65);
  line-height: 1.7;
  margin-bottom: 2rem;
}

.cta-actions {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.8rem;
}

.btn-cta-primary {
  background: var(--clr-primary);
  color: var(--clr-white);
  box-shadow: 0 8px 20px rgba(26, 107, 255, 0.3);
}

.btn-cta-primary:hover,
.btn-cta-primary:focus-visible {
  background: #2b7bff;
  box-shadow: 0 12px 30px rgba(26, 107, 255, 0.4);
}

.btn-cta-secondary {
  color: rgba(255, 255, 255, 0.85);
  border: 1.5px solid rgba(255, 255, 255, 0.2);
}

.btn-cta-secondary:hover,
.btn-cta-secondary:focus-visible {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.4);
  color: var(--clr-white);
}

/* ── Footer ────────────────────────────────────────────────────── */
.site-footer {
  background: #0a1420;
  color: rgba(255, 255, 255, 0.65);
}

.footer-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 3.5rem var(--section-px) 2.5rem;
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 2.5rem;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--clr-white);
  font-weight: 700;
  letter-spacing: 0.1em;
  text-decoration: none;
  margin-bottom: 1rem;
}

.footer-brand .brand-icon {
  background: rgba(26, 107, 255, 0.15);
  color: var(--clr-primary);
}

.footer-tagline {
  font-size: 0.88rem;
  line-height: 1.65;
  color: rgba(255, 255, 255, 0.45);
  max-width: 280px;
}

.footer-col h4 {
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 1rem;
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
}

.footer-col li,
.footer-col a {
  font-size: 0.86rem;
  color: rgba(255, 255, 255, 0.5);
  transition: color var(--dur) var(--ease);
}

.footer-col a:hover,
.footer-col a:focus-visible {
  color: var(--clr-primary);
}

.footer-bottom {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 1.5rem var(--section-px);
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.footer-bottom p {
  font-size: 0.78rem;
  color: rgba(255, 255, 255, 0.35);
}

.footer-disclaimer {
  max-width: 520px;
  text-align: right;
}

/* ══════════════════════════════════════════════════════════════════
   RESPONSIVE
   ══════════════════════════════════════════════════════════════════ */

/* ── Tablet ────────────────────────────────────────────────────── */
@media (max-width: 1024px) {
  .product-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-inner {
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
  }
}

/* ── Mobile Nav Breakpoint ─────────────────────────────────────── */
@media (max-width: 860px) {
  .hamburger {
    display: flex;
  }

  .header-quote {
    display: none;
  }

  .brand-logo {
    height: 46px;
  }

  .main-nav {
    position: fixed;
    top: 0;
    right: 0;
    width: min(320px, 85vw);
    height: 100dvh;
    background: var(--clr-white);
    flex-direction: column;
    align-items: stretch;
    padding: 5rem 1.5rem 2rem;
    gap: 0.25rem;
    overflow-y: auto;
    box-shadow: -8px 0 30px rgba(0, 0, 0, 0.12);
    transform: translateX(100%);
    transition: transform 0.35s var(--ease);
    z-index: 1050;
  }

  .main-nav.open {
    transform: translateX(0);
  }

  .main-nav > a,
  .nav-dropdown-toggle {
    padding: 0.75rem 0.5rem;
    font-size: 0.95rem;
    text-align: left;
    width: 100%;
  }

  /* Mobile dropdown */
  .nav-dropdown-menu {
    position: static;
    transform: none;
    box-shadow: none;
    border: none;
    border-radius: 0;
    padding: 0 0 0 1rem;
    min-width: 0;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s var(--ease), opacity 0.25s var(--ease);
    opacity: 0;
    visibility: visible;
    pointer-events: auto;
  }

  .nav-dropdown-menu::before {
    display: none;
  }

  .nav-dropdown.open .nav-dropdown-menu {
    max-height: 500px;
    opacity: 1;
    transform: none;
  }

  .nav-dropdown-menu a {
    padding: 0.55rem 0.75rem;
    border-left: 2px solid var(--clr-border);
  }

  .nav-dropdown-menu a:hover {
    border-left-color: var(--clr-primary);
  }

  /* Mobile overlay */
  .nav-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.35);
    z-index: 990;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s var(--ease);
  }

  .nav-overlay.active {
    opacity: 1;
    visibility: visible;
  }
}

/* ── Small Tablet ──────────────────────────────────────────────── */
@media (max-width: 768px) {
  :root {
    --section-py: 3.5rem;
    --section-px: 1.2rem;
  }

  .announcement-bar {
    padding: 0.55rem 0.8rem;
  }

  .announcement-bar span {
    font-size: 0.68rem;
    letter-spacing: 0.12em;
  }

  .header-inner {
    min-height: 60px;
    padding: 0 1rem;
  }

  .hero-section {
    padding: 3rem var(--section-px) 3.5rem;
  }

  .hero-content {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .hero-copy {
    max-width: none;
    text-align: center;
  }

  .hero-text {
    max-width: none;
    margin-left: auto;
    margin-right: auto;
  }

  .hero-actions {
    justify-content: center;
  }

  .product-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
  }

  .features-grid {
    grid-template-columns: 1fr;
  }

  .stats-inner {
    flex-wrap: wrap;
    gap: 1rem;
    padding: 1.8rem var(--section-px);
  }

  .stat-divider {
    display: none;
  }

  .stat-item {
    flex: 0 0 45%;
  }

  .footer-inner {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }

  .footer-disclaimer {
    text-align: center;
    max-width: none;
  }

  .cta-actions {
    flex-direction: column;
    align-items: center;
  }

  .btn-cta-primary,
  .btn-cta-secondary {
    width: 100%;
    max-width: 320px;
  }
}

/* ── Phone ─────────────────────────────────────────────────────── */
@media (max-width: 480px) {
  .hero-copy h1 {
    font-size: 2rem;
  }

  .product-grid {
    grid-template-columns: 1fr;
  }

  .visual-card {
    min-height: 300px;
  }

  .visual-battery {
    width: 180px;
    height: 100px;
  }

  .stats-inner {
    gap: 0.8rem;
  }

  .stat-number {
    font-size: 1.6rem;
  }

  .stat-label {
    font-size: 0.7rem;
  }
}

/* ── Entrance Animations ───────────────────────────────────────── */
@keyframes fade-up {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero-copy {
  animation: fade-up 0.7s var(--ease) both;
}

.hero-visual {
  animation: fade-up 0.7s var(--ease) 0.15s both;
}

.stat-item {
  animation: fade-up 0.5s var(--ease) both;
}

.stat-item:nth-child(1) { animation-delay: 0.1s; }
.stat-item:nth-child(3) { animation-delay: 0.2s; }
.stat-item:nth-child(5) { animation-delay: 0.3s; }
.stat-item:nth-child(7) { animation-delay: 0.4s; }

/* ── Scroll Reveal ─────────────────────────────────────────────── */
.reveal-target {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}

.reveal-target.revealed {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger product cards */
.product-card.reveal-target:nth-child(2) { transition-delay: 0.06s; }
.product-card.reveal-target:nth-child(3) { transition-delay: 0.12s; }
.product-card.reveal-target:nth-child(4) { transition-delay: 0.18s; }
.product-card.reveal-target:nth-child(5) { transition-delay: 0.24s; }
.product-card.reveal-target:nth-child(6) { transition-delay: 0.30s; }
.product-card.reveal-target:nth-child(7) { transition-delay: 0.36s; }
.product-card.reveal-target:nth-child(8) { transition-delay: 0.42s; }

/* Stagger feature cards */
.feature-card.reveal-target:nth-child(2) { transition-delay: 0.08s; }
.feature-card.reveal-target:nth-child(3) { transition-delay: 0.16s; }
.feature-card.reveal-target:nth-child(4) { transition-delay: 0.24s; }

/* Stagger value cards */
.value-card.reveal-target:nth-child(2) { transition-delay: 0.08s; }
.value-card.reveal-target:nth-child(3) { transition-delay: 0.16s; }
.value-card.reveal-target:nth-child(4) { transition-delay: 0.24s; }

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

  .reveal-target {
    opacity: 1;
    transform: none;
  }
}

/* ══════════════════════════════════════════════════════════════════
   ABOUT PAGE
   ══════════════════════════════════════════════════════════════════ */

/* ── Active Nav Item ───────────────────────────────────────────── */
.nav-active {
  color: var(--clr-primary) !important;
  position: relative;
}

.nav-active::after {
  content: "";
  position: absolute;
  bottom: 2px;
  left: 0.75rem;
  right: 0.75rem;
  height: 2px;
  background: var(--clr-primary);
  border-radius: 2px;
}

/* ── Page Banner ───────────────────────────────────────────────── */
.page-banner {
  position: relative;
  background: linear-gradient(145deg, var(--clr-dark) 0%, #162d4a 60%, #1a3a5c 100%);
  padding: 4.5rem var(--section-px) 4rem;
  text-align: center;
  overflow: hidden;
}

.page-banner-bg {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse 60% 70% at 50% 50%, black 20%, transparent 80%);
  pointer-events: none;
}

.page-banner-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  position: relative;
  animation: fade-up 0.6s var(--ease) both;
}

.page-banner-tag {
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.5);
  margin-bottom: 0.8rem;
}

.page-banner h1 {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  color: var(--clr-white);
  letter-spacing: -0.02em;
  line-height: 1.1;
  margin-bottom: 1rem;
}

.page-banner-subtitle {
  font-size: 1.02rem;
  color: rgba(255, 255, 255, 0.55);
  max-width: 560px;
  margin: 0 auto;
  line-height: 1.7;
}

/* ── About Intro ───────────────────────────────────────────────── */
.about-intro {
  padding: var(--section-py) 0;
  background: var(--clr-white);
}

.about-intro-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 4rem;
  align-items: center;
}

.about-intro-copy .section-tag {
  text-align: left;
}

.about-intro-copy h2 {
  font-size: clamp(1.6rem, 2.8vw, 2.2rem);
  font-weight: 800;
  color: var(--clr-dark);
  letter-spacing: -0.02em;
  line-height: 1.18;
  margin-bottom: 1.3rem;
}

.about-intro-copy p {
  font-size: 0.96rem;
  color: var(--clr-text-mid);
  line-height: 1.75;
  margin-bottom: 1rem;
}

.about-intro-copy p:last-child {
  margin-bottom: 0;
}

/* About Visual Card */
.about-visual-card {
  background: linear-gradient(145deg, var(--clr-white) 0%, #eef4fb 100%);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg);
  padding: 2.5rem 2rem;
  box-shadow: var(--shadow-lg);
  display: flex;
  flex-direction: column;
  gap: 1.4rem;
}

.about-visual-icon {
  font-size: 2rem;
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--clr-primary-light);
  border-radius: var(--radius-sm);
}

.about-visual-stat {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.avs-number {
  font-size: 2.8rem;
  font-weight: 800;
  color: var(--clr-primary);
  letter-spacing: -0.03em;
  line-height: 1;
}

.avs-label {
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--clr-text-mid);
  line-height: 1.5;
}

.about-visual-bar {
  height: 6px;
  background: var(--clr-border-light);
  border-radius: 6px;
  overflow: hidden;
}

.avb-fill {
  width: 78%;
  height: 100%;
  background: linear-gradient(90deg, var(--clr-primary), #4d9aff);
  border-radius: 6px;
}

.about-visual-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--clr-text-mid);
}

.avr-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

.avr-dot.green {
  background: var(--clr-green);
  box-shadow: 0 0 6px rgba(16, 185, 129, 0.45);
}

.avr-dot.blue {
  background: var(--clr-primary);
  box-shadow: 0 0 6px var(--clr-primary-glow);
}

/* ── Leadership Section ────────────────────────────────────────── */
.leadership-section {
  padding: var(--section-py) 0;
  background: var(--clr-bg);
}

.leader-profile {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 3.5rem;
  align-items: start;
  background: var(--clr-white);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  box-shadow: var(--shadow-md);
}

.leader-photo-wrap {
  border-radius: var(--radius-md);
  overflow: hidden;
  aspect-ratio: 3 / 4;
  background: var(--clr-bg-alt);
}

.leader-photo-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
  display: block;
}

.leader-copy h3 {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--clr-dark);
  letter-spacing: -0.01em;
  margin-bottom: 0.25rem;
}

.leader-title {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--clr-primary);
  letter-spacing: 0.04em;
  margin-bottom: 1.5rem;
}

.leader-copy p {
  font-size: 0.94rem;
  color: var(--clr-text-mid);
  line-height: 1.78;
  margin-bottom: 1rem;
}

.leader-copy p:last-of-type {
  margin-bottom: 0;
}

.leader-creds {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: 1.8rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--clr-border-light);
}

.leader-cred {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--clr-bg);
  padding: 0.6rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.84rem;
  font-weight: 500;
  color: var(--clr-text);
}

.cred-icon {
  font-size: 1.1rem;
}

/* ── Values Section ────────────────────────────────────────────── */
.values-section {
  padding: var(--section-py) 0;
  background: var(--clr-white);
}

.values-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

.value-card {
  background: var(--clr-bg);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-md);
  padding: 2rem 1.6rem 2.2rem;
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.value-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.value-icon {
  font-size: 1.8rem;
  margin-bottom: 1rem;
  width: 52px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--clr-primary-light);
  border-radius: var(--radius-sm);
}

.value-card h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--clr-dark-alt);
  margin-bottom: 0.6rem;
}

.value-card p {
  font-size: 0.88rem;
  color: var(--clr-text-mid);
  line-height: 1.65;
}

/* ── About Page Responsive ─────────────────────────────────────── */
@media (max-width: 1024px) {
  .values-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .leader-profile {
    grid-template-columns: 260px 1fr;
    gap: 2.5rem;
  }
}

@media (max-width: 768px) {
  .page-banner {
    padding: 3rem var(--section-px) 2.5rem;
  }

  .about-intro-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .about-intro-copy .section-tag,
  .about-intro-copy h2 {
    text-align: center;
  }

  .about-intro-copy p {
    text-align: center;
  }

  .leader-profile {
    grid-template-columns: 1fr;
    gap: 2rem;
    padding: 1.5rem;
  }

  .leader-photo-wrap {
    max-width: 280px;
    margin: 0 auto;
  }

  .leader-copy h3,
  .leader-title {
    text-align: center;
  }

  .leader-creds {
    justify-content: center;
  }

  .values-grid {
    grid-template-columns: 1fr;
  }

  .nav-active::after {
    display: none;
  }
}

@media (max-width: 480px) {
  .page-banner h1 {
    font-size: 1.8rem;
  }

  .leader-photo-wrap {
    max-width: 220px;
  }

  .leader-creds {
    flex-direction: column;
  }

  .avs-number {
    font-size: 2.2rem;
  }
}

/* ══════════════════════════════════════════════════════════════════
   UPS CATALOGUE & PRODUCT PAGES
   ══════════════════════════════════════════════════════════════════ */

/* ── Breadcrumbs ──────────────────────────────────────────────── */
.breadcrumb {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 1rem var(--section-px) 0;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.35rem;
  font-size: 0.8rem;
  color: var(--clr-text-light);
}

.breadcrumb a {
  color: var(--clr-text-light);
  transition: color var(--dur) var(--ease);
}

.breadcrumb a:hover {
  color: var(--clr-primary);
}

.breadcrumb .bc-sep {
  opacity: 0.4;
  font-size: 0.7rem;
}

.breadcrumb .bc-current {
  color: var(--clr-text);
  font-weight: 600;
}

/* ── Catalogue Hero ───────────────────────────────────────────── */
.catalogue-intro {
  padding: var(--section-py) 0 2rem;
  background: var(--clr-white);
}

.catalogue-intro-text {
  max-width: 720px;
  margin: 0 auto 2.5rem;
  text-align: center;
}

.catalogue-intro-text p {
  font-size: 0.96rem;
  color: var(--clr-text-mid);
  line-height: 1.75;
}

/* ── Category Filter Tabs ─────────────────────────────────────── */
.category-filters {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 3rem;
}

.filter-btn {
  padding: 0.55rem 1.2rem;
  border-radius: var(--radius-pill);
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--clr-text-mid);
  background: var(--clr-bg);
  border: 1.5px solid var(--clr-border);
  cursor: pointer;
  transition: all var(--dur) var(--ease);
}

.filter-btn:hover {
  color: var(--clr-primary);
  border-color: var(--clr-primary);
  background: var(--clr-primary-light);
}

.filter-btn.active {
  color: var(--clr-white);
  background: var(--clr-primary);
  border-color: var(--clr-primary);
}

/* ── Category Section Headers ─────────────────────────────────── */
.ups-category-section {
  margin-bottom: 3rem;
}

.ups-category-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--clr-dark);
  margin-bottom: 1.5rem;
  padding-bottom: 0.75rem;
  border-bottom: 2px solid var(--clr-border);
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.ups-category-title .cat-icon {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--clr-primary-light);
  border-radius: var(--radius-sm);
  font-size: 1rem;
}

/* ── UPS Product Cards ────────────────────────────────────────── */
.ups-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.ups-product-card {
  display: flex;
  flex-direction: column;
  background: var(--clr-white);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease),
    border-color var(--dur) var(--ease);
}

.ups-product-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--clr-primary);
}

/* Card Image Placeholder */
.ups-card-img {
  background: linear-gradient(145deg, #f0f4f9 0%, #e4ecf4 100%);
  padding: 2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  aspect-ratio: 16 / 10;
  position: relative;
  overflow: hidden;
}

.ups-card-img::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(26, 107, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(26, 107, 255, 0.04) 1px, transparent 1px);
  background-size: 20px 20px;
  pointer-events: none;
}

.ups-placeholder-icon {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.6rem;
  color: var(--clr-text-light);
  opacity: 0.6;
}

.ups-placeholder-icon svg {
  width: 48px;
  height: 48px;
  stroke: var(--clr-text-light);
  fill: none;
  stroke-width: 1.5;
}

.ups-placeholder-icon span {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* Card Body */
.ups-card-body {
  padding: 1.3rem 1.4rem 1.5rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.ups-card-body h3 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--clr-dark-alt);
  margin-bottom: 0.4rem;
  letter-spacing: -0.01em;
}

.ups-card-specs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 0.75rem;
}

.spec-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.25rem 0.6rem;
  background: var(--clr-bg);
  border: 1px solid var(--clr-border-light);
  border-radius: var(--radius-pill);
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--clr-text-mid);
  white-space: nowrap;
}

.spec-badge.primary {
  background: var(--clr-primary-light);
  color: var(--clr-primary);
  border-color: rgba(26, 107, 255, 0.15);
}

.ups-card-desc {
  font-size: 0.84rem;
  color: var(--clr-text-mid);
  line-height: 1.6;
  margin-bottom: 1.2rem;
  flex: 1;
}

.ups-card-actions {
  margin-top: auto;
}

.btn-view-product {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  gap: 0.4rem;
  padding: 0.65rem 1.1rem;
  background: var(--clr-primary);
  color: var(--clr-white) !important;
  border-radius: var(--radius-pill);
  font-size: 0.86rem;
  font-weight: 600;
  text-decoration: none;
  transition: background var(--dur) var(--ease), transform var(--dur) var(--ease),
    box-shadow var(--dur) var(--ease);
}

.btn-view-product:hover {
  background: var(--clr-primary-dark);
  color: var(--clr-white) !important;
  transform: translateY(-1px);
  box-shadow: 0 4px 14px var(--clr-primary-glow);
}

.btn-view-product .arrow {
  font-size: 0.9rem;
  transition: transform var(--dur) var(--ease);
}

.btn-view-product:hover .arrow {
  transform: translateX(3px);
}

/* ── Trademark Disclaimer (catalogue) ─────────────────────────── */
.trademark-notice {
  text-align: center;
  padding: 1.5rem var(--section-px);
  font-size: 0.76rem;
  color: var(--clr-text-light);
  max-width: var(--max-w);
  margin: 0 auto;
  line-height: 1.6;
}

/* ══════════════════════════════════════════════════════════════════
   PRODUCT DETAIL PAGE
   ══════════════════════════════════════════════════════════════════ */

/* ── Product Header ───────────────────────────────────────────── */
.product-hero {
  padding: 2.5rem 0 0;
  background: var(--clr-white);
}

.product-hero-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--section-px);
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 3rem;
  align-items: start;
}

/* Product Image Placeholder */
.product-img-placeholder {
  background: linear-gradient(145deg, #f0f4f9 0%, #e4ecf4 100%);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg);
  aspect-ratio: 4 / 3;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.product-img-placeholder::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(26, 107, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(26, 107, 255, 0.04) 1px, transparent 1px);
  background-size: 28px 28px;
  mask-image: linear-gradient(to bottom, rgba(0,0,0,0.5), transparent 85%);
  pointer-events: none;
}

.placeholder-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.8rem;
  color: var(--clr-text-light);
  opacity: 0.5;
  z-index: 1;
}

.placeholder-content svg {
  width: 64px;
  height: 64px;
  stroke: var(--clr-text-light);
  fill: none;
  stroke-width: 1.2;
}

.placeholder-content span {
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

/* Product Summary */
.product-summary {
  padding-top: 0.5rem;
}

.product-category-tag {
  display: inline-block;
  padding: 0.3rem 0.85rem;
  background: var(--clr-primary-light);
  color: var(--clr-primary);
  border-radius: var(--radius-pill);
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 0.8rem;
}

.product-summary h1 {
  font-size: clamp(1.8rem, 3vw, 2.6rem);
  font-weight: 800;
  color: var(--clr-dark);
  letter-spacing: -0.02em;
  line-height: 1.12;
  margin-bottom: 0.5rem;
}

.product-power-range {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--clr-primary);
  margin-bottom: 1.2rem;
}

.product-summary > p {
  font-size: 0.96rem;
  color: var(--clr-text-mid);
  line-height: 1.75;
  margin-bottom: 1rem;
}

/* Quick Specs Strip */
.quick-specs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin: 1.5rem 0;
  padding: 1.2rem 0;
  border-top: 1px solid var(--clr-border-light);
  border-bottom: 1px solid var(--clr-border-light);
}

.qs-item {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  min-width: 120px;
}

.qs-label {
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--clr-text-light);
}

.qs-value {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--clr-dark-alt);
}

/* Product Action Buttons */
.product-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 1.5rem;
}

.btn-enquiry {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.8rem 1.6rem;
  background: var(--clr-primary);
  color: var(--clr-white);
  border-radius: var(--radius-pill);
  font-size: 0.88rem;
  font-weight: 600;
  text-decoration: none;
  transition: background var(--dur) var(--ease), transform var(--dur) var(--ease),
    box-shadow var(--dur) var(--ease);
}

.btn-enquiry:hover {
  background: var(--clr-primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px var(--clr-primary-glow);
}

.btn-manufacturer {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.8rem 1.6rem;
  color: var(--clr-text-mid);
  background: transparent;
  border: 1.5px solid var(--clr-border);
  border-radius: var(--radius-pill);
  font-size: 0.88rem;
  font-weight: 600;
  text-decoration: none;
  transition: all var(--dur) var(--ease);
}

.btn-manufacturer:hover {
  color: var(--clr-primary);
  border-color: var(--clr-primary);
  background: var(--clr-primary-light);
}

/* ── Specifications Section ───────────────────────────────────── */
.specs-section {
  padding: var(--section-py) 0;
  background: var(--clr-bg);
}

.spec-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--clr-white);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.spec-table tr {
  border-bottom: 1px solid var(--clr-border-light);
}

.spec-table tr:last-child {
  border-bottom: none;
}

.spec-table th {
  text-align: left;
  padding: 0.85rem 1.2rem;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--clr-text-light);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  background: var(--clr-bg);
  width: 200px;
  vertical-align: top;
}

.spec-table td {
  padding: 0.85rem 1.2rem;
  font-size: 0.9rem;
  color: var(--clr-dark-alt);
  font-weight: 500;
}

.spec-table tr:hover {
  background: rgba(26, 107, 255, 0.02);
}

/* ── Features Grid ────────────────────────────────────────────── */
.features-detail-section {
  padding: var(--section-py) 0;
  background: var(--clr-white);
}

.features-detail-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.3rem;
}

.feature-item {
  display: flex;
  align-items: flex-start;
  gap: 0.9rem;
  padding: 1.3rem;
  background: var(--clr-bg);
  border: 1px solid var(--clr-border-light);
  border-radius: var(--radius-md);
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.feature-item:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.fi-icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--clr-primary-light);
  border-radius: var(--radius-sm);
  flex-shrink: 0;
  font-size: 1.1rem;
}

.fi-text h4 {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--clr-dark-alt);
  margin-bottom: 0.2rem;
}

.fi-text p {
  font-size: 0.8rem;
  color: var(--clr-text-mid);
  line-height: 1.55;
}

/* ── Applications Tags ────────────────────────────────────────── */
.applications-section {
  padding: var(--section-py) 0;
  background: var(--clr-bg);
}

.app-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  justify-content: center;
}

.app-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.6rem 1.2rem;
  background: var(--clr-white);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-pill);
  font-size: 0.84rem;
  font-weight: 500;
  color: var(--clr-text);
  transition: all var(--dur) var(--ease);
}

.app-tag:hover {
  border-color: var(--clr-primary);
  color: var(--clr-primary);
  background: var(--clr-primary-light);
}

.app-tag-icon {
  font-size: 1rem;
}

/* ── Product CTA Section ──────────────────────────────────────── */
.product-cta {
  padding: var(--section-py) var(--section-px);
  background: linear-gradient(135deg, var(--clr-dark) 0%, #162d4a 50%, #1a3a5c 100%);
  text-align: center;
}

.product-cta-inner {
  max-width: 700px;
  margin: 0 auto;
}

.product-cta h2 {
  font-size: clamp(1.5rem, 2.8vw, 2.2rem);
  font-weight: 800;
  color: var(--clr-white);
  margin-bottom: 0.8rem;
}

.product-cta p {
  font-size: 0.98rem;
  color: rgba(255, 255, 255, 0.6);
  line-height: 1.7;
  margin-bottom: 1.8rem;
}

.product-cta-contacts {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.cta-contact-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.3rem;
}

.cta-contact-item .cta-label {
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: rgba(255, 255, 255, 0.4);
}

.cta-contact-item a {
  color: var(--clr-white);
  font-size: 0.92rem;
  font-weight: 600;
  text-decoration: none;
  transition: color var(--dur) var(--ease);
}

.cta-contact-item a:hover {
  color: var(--clr-primary);
}

/* ══════════════════════════════════════════════════════════════════
   LITHIUM BATTERY SOLUTIONS PAGE
   ══════════════════════════════════════════════════════════════════ */

.lithium-intro {
  padding: var(--section-py) 0;
  background: var(--clr-white);
}

.lithium-intro-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 3.5rem;
  align-items: center;
}

.lithium-intro-copy h2 {
  font-size: clamp(1.5rem, 2.5vw, 2rem);
  font-weight: 800;
  color: var(--clr-dark);
  margin-bottom: 1.2rem;
  line-height: 1.18;
}

.lithium-intro-copy p {
  font-size: 0.94rem;
  color: var(--clr-text-mid);
  line-height: 1.75;
  margin-bottom: 1rem;
}

/* Advantage Cards */
.lithium-advantages {
  padding: var(--section-py) 0;
  background: var(--clr-bg);
}

.advantage-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.4rem;
}

.advantage-card {
  background: var(--clr-white);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-md);
  padding: 1.8rem 1.5rem;
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.advantage-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.advantage-icon {
  font-size: 1.6rem;
  margin-bottom: 0.8rem;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--clr-primary-light);
  border-radius: var(--radius-sm);
}

.advantage-card h3 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--clr-dark-alt);
  margin-bottom: 0.45rem;
}

.advantage-card p {
  font-size: 0.84rem;
  color: var(--clr-text-mid);
  line-height: 1.6;
}

/* Compatible Products List */
.compatible-section {
  padding: var(--section-py) 0;
  background: var(--clr-white);
}

.compatible-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.3rem;
}

.compatible-card {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.2rem 1.4rem;
  background: var(--clr-bg);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-md);
  text-decoration: none;
  color: var(--clr-text);
  transition: all var(--dur) var(--ease);
}

.compatible-card:hover {
  border-color: var(--clr-primary);
  background: var(--clr-primary-light);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.cc-icon {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--clr-primary-light);
  border-radius: var(--radius-sm);
  flex-shrink: 0;
  font-size: 1.2rem;
}

.cc-info h4 {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--clr-dark-alt);
  margin-bottom: 0.15rem;
}

.cc-info span {
  font-size: 0.78rem;
  color: var(--clr-text-mid);
}

/* ══════════════════════════════════════════════════════════════════
   UPS PAGES RESPONSIVE
   ══════════════════════════════════════════════════════════════════ */

@media (max-width: 1024px) {
  .ups-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .features-detail-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .advantage-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .compatible-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .product-hero-inner {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .product-summary {
    text-align: center;
  }

  .quick-specs {
    justify-content: center;
  }

  .product-actions {
    justify-content: center;
  }

  .ups-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
  }

  .features-detail-grid {
    grid-template-columns: 1fr;
  }

  .advantage-grid {
    grid-template-columns: 1fr;
  }

  .compatible-grid {
    grid-template-columns: 1fr;
  }

  .lithium-intro-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .spec-table th {
    width: 140px;
    padding: 0.7rem 0.8rem;
    font-size: 0.76rem;
  }

  .spec-table td {
    padding: 0.7rem 0.8rem;
    font-size: 0.84rem;
  }

  .product-cta-contacts {
    flex-direction: column;
    align-items: center;
    gap: 1rem;
  }

  .category-filters {
    gap: 0.35rem;
  }

  .filter-btn {
    padding: 0.45rem 0.9rem;
    font-size: 0.76rem;
  }
}

@media (max-width: 480px) {
  .ups-grid {
    grid-template-columns: 1fr;
  }

  .ups-card-body h3 {
    font-size: 0.95rem;
  }

  .product-hero-inner {
    gap: 1.5rem;
  }

  .quick-specs {
    gap: 0.5rem;
  }

  .qs-item {
    min-width: 100px;
  }

  .breadcrumb {
    font-size: 0.72rem;
  }
}