/* ============================================================
   IMPULSE LABS — Full Clone CSS
   Deep dark, premium tech-brand aesthetic
   ============================================================ */

/* ---------- RESET & BASE ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --black: #080808;
  --near-black: #0e0e0e;
  --dark-1: #121212;
  --dark-2: #181818;
  --dark-3: #222222;
  --dark-4: #2a2a2a;
  --dark-5: #333333;
  --grey-1: #555555;
  --grey-2: #777777;
  --grey-3: #999999;
  --grey-4: #bbbbbb;
  --white: #ffffff;
  --off-white: #f0f0f0;
  --accent: #e85d2f;
  --accent-dim: rgba(232, 93, 47, 0.15);
  --accent-glow: rgba(232, 93, 47, 0.4);
  --green: #4ade80;
  --red: #f87171;
  --blue: #60a5fa;
  --purple: #a78bfa;
  --font-sans:
    "DM Sans", "Inter", -apple-system, BlinkMacSystemFont, sans-serif;
  --nav-h: 72px;
  --section-pad: 120px;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  background-color: var(--black);
  color: var(--white);
  font-family: var(--font-sans);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

a {
  text-decoration: none;
  color: inherit;
}
img,
svg {
  display: block;
}

/* ---------- BUTTONS ---------- */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: var(--accent);
  color: var(--white);
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 14px 36px;
  border-radius: 3px;
  border: none;
  cursor: pointer;
  transition:
    background 0.2s ease,
    transform 0.15s ease,
    box-shadow 0.2s ease;
}
.btn-primary:hover {
  background: #d04d20;
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(232, 93, 47, 0.35);
}
.btn-primary.btn-large {
  font-size: 14px;
  padding: 18px 40px;
  letter-spacing: 0.04em;
  text-transform: none;
  font-weight: 600;
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: transparent;
  color: var(--grey-4);
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.06em;
  padding: 14px 24px;
  border: 1px solid var(--dark-5);
  border-radius: 3px;
  cursor: pointer;
  transition:
    border-color 0.2s,
    color 0.2s,
    background 0.2s;
}
.btn-secondary:hover {
  border-color: var(--grey-2);
  color: var(--white);
  background: var(--dark-2);
}

.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--grey-3);
  font-size: 14px;
  font-weight: 500;
  transition: color 0.2s;
}
.btn-ghost:hover {
  color: var(--white);
}

/* ---------- TYPOGRAPHY HELPERS ---------- */
.section-eyebrow {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 20px;
}

.section-title {
  font-size: clamp(28px, 3.8vw, 50px);
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: -0.025em;
  color: var(--white);
  margin-bottom: 20px;
}

.section-subtitle {
  font-size: 18px;
  font-weight: 400;
  color: var(--grey-3);
  line-height: 1.6;
  max-width: 520px;
}

/* ============================================================
   NAVBAR
============================================================ */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--nav-h);
  transition:
    background 0.3s ease,
    backdrop-filter 0.3s ease,
    border-color 0.3s ease;
  border-bottom: 1px solid transparent;
}

.navbar.scrolled {
  background: rgba(8, 8, 8, 0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom-color: var(--dark-4);
}

.nav-inner {
  max-width: 1280px;
  margin: 0 auto;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 32px;
}

.nav-logo {
  display: flex;
  align-items: center;
  font-family: var(--font-sans);
  font-size: 22px;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--white);
  transition: opacity 0.2s;
}
.nav-logo:hover {
  opacity: 0.8;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-link {
  font-size: 14px;
  font-weight: 500;
  color: var(--grey-3);
  padding: 8px 16px;
  border-radius: 3px;
  transition:
    color 0.2s,
    background 0.2s;
}
.nav-link:hover {
  color: var(--white);
}

.nav-shop {
  background: var(--accent);
  color: var(--white);
  font-weight: 700;
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 9px 22px;
}
.nav-shop:hover {
  background: #d04d20;
  color: var(--white);
}

/* ── Language Switcher ── */
.lang-switcher {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: 16px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 20px;
  padding: 4px 10px;
  transition: background 0.2s;
}
.lang-switcher:hover {
  background: rgba(255,255,255,0.1);
}
.lang-btn {
  background: none;
  border: none;
  cursor: pointer;
  font-family: var(--font-sans);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--grey-3);
  padding: 3px 6px;
  border-radius: 12px;
  transition: color 0.2s, background 0.2s;
}
.lang-btn:hover {
  color: var(--white);
}
.lang-btn.active {
  background: var(--accent);
  color: var(--white);
}
.lang-divider {
  color: rgba(255,255,255,0.2);
  font-size: 11px;
  user-select: none;
}

.nav-menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}
.nav-menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--white);
  border-radius: 1px;
  transition: transform 0.3s;
}

/* ============================================================
   HERO — Full video background
============================================================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: flex-end;
  overflow: hidden;
  background: var(--black);
}

/* Video container */
.hero-video-wrap {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center center;
  display: block;
}

/* Gradient overlay: dark at bottom for text legibility */
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to bottom,
    rgba(8, 8, 8, 0.15) 0%,
    rgba(8, 8, 8, 0.1) 30%,
    rgba(8, 8, 8, 0.55) 65%,
    rgba(8, 8, 8, 0.92) 100%
  );
  z-index: 1;
}

/* Hero text content */
.hero-content {
  position: absolute;
  bottom: 60px;
  left: 48px;
  z-index: 2;
  width: auto;
  padding-bottom: 0;
}

.hero-content-inner {
  max-width: 100%;
  margin: 0;
  padding: 0;
}

.hero-tagline {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 20px;
  animation: fadeInUp 0.9s ease both;
  animation-delay: 0.2s;
}

.hero-headline {
  font-size: clamp(40px, 5.5vw, 78px);
  font-weight: 900;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--white);
  margin-bottom: 24px;
  max-width: 820px;
  animation: fadeInUp 0.9s ease both;
  animation-delay: 0.35s;
}

.hero-sub {
  font-size: 16px;
  font-weight: 400;
  color: rgba(255, 255, 255, 0.65);
  line-height: 1.7;
  margin-bottom: 40px;
  max-width: 460px;
  animation: fadeInUp 0.9s ease both;
  animation-delay: 0.5s;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  gap: 16px;
  animation: fadeInUp 0.9s ease both;
  animation-delay: 0.65s;
}

/* Award badges — bottom right */
.hero-awards {
  position: absolute;
  bottom: 40px;
  right: 48px;
  z-index: 3;
  display: flex;
  align-items: center;
  gap: 20px;
  animation: fadeIn 1.2s ease both;
  animation-delay: 1s;
}

.award-badge {
  height: 48px;
  width: auto;
  opacity: 0.85;
  filter: brightness(0) invert(1);
  transition: opacity 0.2s;
}

.award-badge:hover {
  opacity: 1;
}

/* Scroll indicator */
.scroll-indicator {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  z-index: 3;
  opacity: 0.45;
  animation: fadeIn 1.5s ease both;
  animation-delay: 1.2s;
}

.scroll-line {
  width: 1px;
  height: 52px;
  background: linear-gradient(to bottom, transparent, rgba(255, 255, 255, 0.6));
  animation: scrollDown 2s ease-in-out infinite;
}

@keyframes scrollDown {
  0% {
    transform: scaleY(0);
    transform-origin: top;
    opacity: 0;
  }
  30% {
    opacity: 1;
  }
  50% {
    transform: scaleY(1);
    transform-origin: top;
  }
  51% {
    transform: scaleY(1);
    transform-origin: bottom;
  }
  100% {
    transform: scaleY(0);
    transform-origin: bottom;
    opacity: 0;
  }
}

/* ============================================================
   PHOTO STRIP
============================================================ */
.photo-strip {
  background: var(--black);
  overflow: hidden;
  padding: 0;
}

.photo-strip-inner {
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
  cursor: grab;
  display: flex;
  justify-content: center;
}

.photo-strip-inner::-webkit-scrollbar {
  display: none;
}
.photo-strip-inner.dragging {
  cursor: grabbing;
}

.photo-strip-track {
  display: flex;
  gap: 3px;
  width: max-content;
}

.photo-strip-item {
  flex-shrink: 0;
  width: 380px;
  height: 280px;
  overflow: hidden;
  background: var(--dark-2);
}

.photo-strip-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition:
    transform 0.5s ease,
    filter 0.3s ease;
  filter: brightness(0.9);
}

.photo-strip-item:hover img {
  transform: scale(1.04);
  filter: brightness(1);
}

/* ============================================================
   STATS BAR
============================================================ */
.stats-bar {
  background: var(--dark-2);
  border-top: 1px solid var(--dark-4);
  border-bottom: 1px solid var(--dark-4);
}

.stats-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 32px;
  display: flex;
  align-items: stretch;
  height: 96px;
}

.stat-item {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  padding: 0 16px;
}

.stat-number {
  font-size: clamp(22px, 2.5vw, 30px);
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--white);
  line-height: 1;
}

.stat-unit {
  font-size: 0.55em;
  font-weight: 600;
  color: var(--grey-3);
  margin-left: 2px;
}

.stat-label {
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--grey-1);
}

.stat-divider {
  width: 1px;
  background: var(--dark-4);
  margin: 20px 0;
}

/* ============================================================
   COMPARISON TABLE
============================================================ */
.comparison {
  background: var(--near-black);
  padding: var(--section-pad) 0;
}

.comparison--alt {
  background: var(--dark-1);
}

.comparison-inner {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 32px;
}

.comparison-header {
  text-align: center;
  margin-bottom: 64px;
}

.comparison-header .section-subtitle {
  margin: 0 auto;
}

.comparison-table-wrap {
  overflow-x: auto;
  border-radius: 16px;
  border: 1px solid var(--dark-4);
  background: var(--dark-1);
  box-shadow: 0 32px 80px rgba(0, 0, 0, 0.5);
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 15px;
}

.comparison-table th,
.comparison-table td {
  padding: 18px 24px;
  text-align: left;
  vertical-align: middle;
}

.comparison-table thead tr {
  border-bottom: 1px solid var(--dark-5);
}

.comparison-table tbody tr {
  border-bottom: 1px solid var(--dark-3);
  transition: background 0.15s;
}

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

.comparison-table tbody tr:hover {
  background: var(--dark-2);
}

/* Column widths */
.col-feature {
  width: 34%;
}
.col-impulse {
  width: 33%;
}
.col-others {
  width: 33%;
}

/* Header cells */
.th-brand {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.th-logo-text {
  font-size: 18px;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--white);
}

.th-others-label {
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--grey-3);
}

.th-others-sub {
  font-size: 12px;
  color: var(--grey-1);
}

/* Feature name */
.feature-name {
  font-size: 14px;
  font-weight: 500;
  color: var(--grey-3);
}

/* Impulse column values */
.val-impulse {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.val-highlight {
  font-size: 15px;
  font-weight: 700;
  color: var(--white);
}

.val-note {
  font-size: 11px;
  color: var(--grey-1);
}

/* Others column values */
.val-others {
  display: flex;
  flex-direction: column;
  gap: 3px;
  color: var(--grey-2);
  font-size: 15px;
}

/* Check / X icons */
.check-wrap {
  display: flex;
  align-items: center;
  gap: 8px;
}

.icon-check {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

.icon-x {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

/* Highlight the Impulse column header */
.col-impulse {
  background: rgba(232, 93, 47, 0.04);
  border-left: 2px solid rgba(232, 93, 47, 0.3);
}

.val-impulse {
  border-left: 2px solid transparent; /* aligns with header */
}

/* ============================================================
   FEATURES
============================================================ */
.features {
  background: var(--black);
  padding: var(--section-pad) 0;
}

.features-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 32px;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  background: var(--dark-1);
  border: 1px solid var(--dark-4);
  border-radius: 20px;
  padding: 48px 40px;
  transition:
    transform 0.3s ease,
    border-color 0.3s ease,
    box-shadow 0.3s ease;
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 20px;
  opacity: 0;
  transition: opacity 0.3s;
}

.feature-card--performance::before {
  background: radial-gradient(
    circle at top left,
    rgba(232, 93, 47, 0.08),
    transparent 60%
  );
}
.feature-card--precision::before {
  background: radial-gradient(
    circle at top left,
    rgba(96, 165, 250, 0.08),
    transparent 60%
  );
}
.feature-card--install::before {
  background: radial-gradient(
    circle at top left,
    rgba(167, 139, 250, 0.08),
    transparent 60%
  );
}

.feature-card:hover {
  transform: translateY(-4px);
  border-color: var(--dark-5);
  box-shadow: 0 24px 64px rgba(0, 0, 0, 0.5);
}

.feature-card:hover::before {
  opacity: 1;
}

.feature-icon {
  width: 56px;
  height: 56px;
  margin-bottom: 32px;
}

.feature-icon svg {
  width: 100%;
  height: 100%;
}

.feature-title {
  font-size: 22px;
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.25;
  color: var(--white);
  margin-bottom: 16px;
}

.feature-desc {
  font-size: 15px;
  font-weight: 400;
  color: var(--grey-2);
  line-height: 1.65;
  margin-bottom: 40px;
}

.feature-stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding-top: 24px;
  border-top: 1px solid var(--dark-4);
}

.big-num {
  font-size: 44px;
  font-weight: 900;
  letter-spacing: -0.03em;
  color: var(--white);
  line-height: 1;
}

.big-unit {
  font-size: 0.45em;
  font-weight: 600;
  color: var(--grey-2);
  margin-left: 2px;
}

.big-label {
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--grey-1);
}

/* ============================================================
   BATTERY / SECRET INGREDIENT
============================================================ */
.battery-section {
  background: var(--dark-1);
  border-top: 1px solid var(--dark-4);
  border-bottom: 1px solid var(--dark-4);
  padding: var(--section-pad) 0;
  overflow: hidden;
}

.battery-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 32px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.battery-title {
  font-size: clamp(36px, 4.5vw, 60px);
  font-weight: 900;
  letter-spacing: -0.03em;
  line-height: 1.05;
  color: var(--white);
  margin-bottom: 24px;
}

.battery-desc {
  font-size: 17px;
  color: var(--grey-3);
  line-height: 1.7;
  margin-bottom: 48px;
}

.battery-desc strong {
  color: var(--white);
  font-weight: 700;
}

.battery-specs {
  display: flex;
  align-items: center;
  gap: 32px;
}

.bspec {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.bspec-num {
  font-size: 30px;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--white);
  line-height: 1;
}

.bspec-unit {
  font-size: 0.55em;
  color: var(--grey-3);
}

.bspec-label {
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--grey-1);
}

.bspec-div {
  width: 1px;
  height: 40px;
  background: var(--dark-5);
}

/* Battery Visual — real CGI image */
.battery-visual {
  display: flex;
  align-items: center;
  justify-content: center;
}

.battery-image-wrap {
  position: relative;
  width: 100%;
  max-width: 540px;
  border-radius: 20px;
  overflow: hidden;
}

.battery-img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 20px;
  border: 1px solid var(--dark-4);
}

.battery-img-glow {
  position: absolute;
  bottom: -40px;
  left: 50%;
  transform: translateX(-50%);
  width: 70%;
  height: 100px;
  background: radial-gradient(
    ellipse,
    rgba(232, 93, 47, 0.25) 0%,
    transparent 70%
  );
  filter: blur(24px);
  pointer-events: none;
}

/* ============================================================
   MISSION
============================================================ */
.mission {
  background: var(--black);
  padding: var(--section-pad) 0;
  text-align: center;
}

.mission-inner {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 32px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.mission-quote {
  font-size: clamp(22px, 3vw, 36px);
  font-weight: 700;
  line-height: 1.35;
  letter-spacing: -0.02em;
  color: var(--white);
  font-style: normal;
  margin-bottom: 40px;
  position: relative;
}

.mission-quote::before,
.mission-quote::after {
  content: '"';
  color: var(--accent);
  font-size: 1.2em;
  line-height: 1;
}

.mission-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 15px;
  font-weight: 600;
  color: var(--grey-3);
  border-bottom: 1px solid var(--dark-5);
  padding-bottom: 4px;
  transition:
    color 0.2s,
    border-color 0.2s;
}

.mission-link:hover {
  color: var(--white);
  border-color: var(--grey-2);
}

/* ============================================================
   PRODUCT SECTION — Real image gallery
============================================================ */
.product-section {
  background: var(--near-black);
  padding: var(--section-pad) 0;
  border-top: 1px solid var(--dark-4);
}

.product-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 32px;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 72px;
  align-items: start;
}

/* Gallery */
.product-gallery {
  display: flex;
  flex-direction: column;
  gap: 16px;
  position: sticky;
  top: calc(var(--nav-h) + 24px);
}

.product-main-img-wrap {
  position: relative;
  border-radius: 16px;
  overflow: hidden;
  background: var(--dark-2);
  border: 1px solid var(--dark-4);
  aspect-ratio: 4/3;
}

.product-main-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: opacity 0.3s ease;
}

.product-thumbs {
  display: flex;
  gap: 8px;
}

.thumb-btn {
  width: 72px;
  height: 72px;
  border-radius: 8px;
  overflow: hidden;
  border: 2px solid transparent;
  background: var(--dark-3);
  cursor: pointer;
  padding: 0;
  transition:
    border-color 0.2s,
    transform 0.15s;
  flex-shrink: 0;
}

.thumb-btn img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.thumb-btn.active {
  border-color: var(--accent);
}

.thumb-btn:hover {
  transform: translateY(-2px);
  border-color: var(--grey-2);
}

.thumb-btn.active:hover {
  border-color: var(--accent);
}

.product-config-pills {
  display: flex;
  gap: 8px;
  justify-content: center;
  margin-top: 20px;
}

.config-pill {
  background: var(--dark-3);
  color: var(--grey-3);
  border: 1px solid var(--dark-5);
  border-radius: 999px;
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 600;
  padding: 8px 24px;
  cursor: pointer;
  transition: all 0.2s;
}

.config-pill.active,
.config-pill:hover {
  background: var(--accent);
  color: var(--white);
  border-color: var(--accent);
}

.product-label {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 16px;
}

.product-title {
  font-size: clamp(28px, 3.2vw, 44px);
  font-weight: 800;
  letter-spacing: -0.025em;
  line-height: 1.1;
  color: var(--white);
  margin-bottom: 20px;
}

.product-price {
  font-size: 36px;
  font-weight: 800;
  color: var(--white);
  margin-bottom: 28px;
  letter-spacing: -0.02em;
}

.product-desc-block {
  margin-bottom: 32px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.product-desc-block p {
  font-size: 15px;
  color: var(--grey-3);
  line-height: 1.7;
}

.product-desc-block strong {
  color: var(--white);
  font-weight: 600;
}

.product-features-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 40px;
}

.product-features-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: var(--grey-3);
  font-weight: 500;
}

.feat-icon {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

.product-cta-row {
  display: flex;
  align-items: center;
  gap: 24px;
}

/* ============================================================
   PRODUCT RECOMMENDATIONS
============================================================ */
.recommendations {
  background: var(--near-black);
  padding: var(--section-pad) 0;
  border-top: 1px solid var(--dark-4);
}

.recommendations-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 32px;
}

.recommendations-header {
  text-align: center;
  margin-bottom: 64px;
}

.recommendations-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.recommendation-card {
  background: var(--dark-1);
  border: 1px solid var(--dark-4);
  border-radius: 20px;
  overflow: hidden;
  transition:
    transform 0.3s ease,
    border-color 0.3s ease,
    box-shadow 0.3s ease;
}

.recommendation-card:hover {
  transform: translateY(-4px);
  border-color: var(--dark-5);
  box-shadow: 0 24px 64px rgba(0, 0, 0, 0.5);
}

.recommendation-img-wrap {
  position: relative;
  aspect-ratio: 4/3;
  overflow: hidden;
}

.recommendation-img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

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

.recommendation-info {
  padding: 32px 24px;
}

.recommendation-title {
  font-size: 20px;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--white);
  margin-bottom: 12px;
}

.recommendation-price {
  font-size: 24px;
  font-weight: 800;
  color: var(--accent);
  margin-bottom: 16px;
}

.recommendation-desc {
  font-size: 14px;
  color: var(--grey-3);
  line-height: 1.6;
  margin-bottom: 24px;
}

/* ============================================================
   TAGLINE SECTION
============================================================ */
.tagline-section {
  background: var(--black);
  border-top: 1px solid var(--dark-4);
  padding: 120px 0;
  text-align: center;
}

.tagline-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 32px;
}

.tagline-text {
  font-size: clamp(52px, 8vw, 110px);
  font-weight: 900;
  letter-spacing: -0.04em;
  color: var(--white);
  line-height: 1;
}

/* ============================================================
   FOOTER
============================================================ */
.footer {
  background: var(--dark-1);
  border-top: 1px solid var(--dark-4);
}

.footer-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 32px;
}

.footer-top {
  display: flex;
  justify-content: space-between;
  padding: 64px 0 48px;
  gap: 64px;
  border-bottom: 1px solid var(--dark-4);
}

.footer-brand {
  flex: 1;
  max-width: 300px;
}

.footer-logo {
  display: block;
  font-size: 24px;
  font-weight: 900;
  letter-spacing: -0.02em;
  color: var(--white);
  margin-bottom: 12px;
}

.footer-tagline-sm {
  font-size: 14px;
  color: var(--grey-1);
  line-height: 1.6;
}

.footer-links {
  display: flex;
  gap: 64px;
}

.footer-col {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-col-title {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--grey-1);
  margin-bottom: 4px;
}

.footer-col a {
  font-size: 14px;
  color: var(--grey-2);
  transition: color 0.2s;
}

.footer-col a:hover {
  color: var(--white);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 24px 0;
  gap: 24px;
}

.footer-bottom p {
  font-size: 13px;
  color: var(--grey-1);
}

.footer-legal {
  display: flex;
  gap: 24px;
}

.footer-legal a {
  font-size: 13px;
  color: var(--grey-1);
  transition: color 0.2s;
}

.footer-legal a:hover {
  color: var(--grey-3);
}

.footer-support {
  font-size: 12px;
  color: var(--grey-1);
  margin-top: 8px;
}

/* ============================================================
   ANIMATIONS
============================================================ */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

/* Intersection Observer animation targets */
.anim-fade-up {
  opacity: 0;
  transform: translateY(32px);
  transition:
    opacity 0.7s ease,
    transform 0.7s ease;
}

.anim-fade-up.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.anim-fade-up.delay-1 {
  transition-delay: 0.1s;
}
.anim-fade-up.delay-2 {
  transition-delay: 0.2s;
}
.anim-fade-up.delay-3 {
  transition-delay: 0.3s;
}
.anim-fade-up.delay-4 {
  transition-delay: 0.4s;
}
.anim-fade-up.delay-5 {
  transition-delay: 0.5s;
}

/* Mobile nav open state */
.nav-links.mobile-open {
  display: flex !important;
  position: fixed;
  top: var(--nav-h);
  left: 0;
  right: 0;
  flex-direction: column;
  padding: 16px 24px 28px;
  background: rgba(8, 8, 8, 0.98);
  border-bottom: 1px solid var(--dark-4);
  z-index: 999;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  gap: 4px;
}

.nav-links.mobile-open .nav-link {
  padding: 12px 8px;
  font-size: 16px;
  border-bottom: 1px solid var(--dark-3);
}

.nav-links.mobile-open .nav-shop {
  margin-top: 12px;
  border-bottom: none;
  text-align: center;
  padding: 14px;
  border-radius: 4px;
}

/* ============================================================
   RESPONSIVE — Tablet
============================================================ */
@media (max-width: 1024px) {
  :root {
    --section-pad: 88px;
  }

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

  .product-inner {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .recommendations-grid {
    grid-template-columns: 1fr 1fr;
    gap: 20px;
  }

  .product-gallery {
    position: static;
  }

  .battery-inner {
    grid-template-columns: 1fr;
    gap: 56px;
  }

  .battery-visual {
    order: -1;
  }

  .photo-strip-item {
    width: 300px;
    height: 220px;
  }
}

/* ============================================================
   RESPONSIVE — Mobile
============================================================ */
@media (max-width: 768px) {
  :root {
    --nav-h: 60px;
    --section-pad: 64px;
  }

  .nav-links {
    display: none;
  }
  .nav-menu-toggle {
    display: flex;
  }
  .lang-switcher {
    margin-left: 8px;
    padding: 3px 8px;
  }
  .lang-btn {
    font-size: 11px;
    padding: 2px 4px;
  }

  /* Hero mobile */
  .hero-content-inner {
    padding: 0 24px;
  }
  .hero-content {
    padding-bottom: 80px;
  }

  .hero-headline {
    font-size: clamp(36px, 10vw, 54px);
  }

  .hero-sub {
    font-size: 14px;
  }

  .hero-awards {
    right: 20px;
    bottom: 28px;
    gap: 12px;
  }

  .award-badge {
    height: 36px;
  }

  /* Stats */
  .stats-inner {
    flex-wrap: wrap;
    height: auto;
    padding: 24px 16px;
  }

  .stat-item {
    flex: 0 0 50%;
    padding: 16px 8px;
  }

  .stat-divider {
    display: none;
  }

  /* Comparison */
  .comparison-inner {
    padding: 0 16px;
  }
  .comparison-table th,
  .comparison-table td {
    padding: 14px 14px;
  }
  .feature-name {
    font-size: 13px;
  }
  .val-highlight {
    font-size: 13px;
  }
  .val-others span {
    font-size: 13px;
  }

  /* Features */
  .features-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .feature-card {
    padding: 32px 24px;
  }

  /* Recommendations */
  .recommendations-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .recommendation-info {
    padding: 24px 20px;
  }

  /* Photo strip */
  .photo-strip-item {
    width: 260px;
    height: 190px;
  }

  /* Product section */
  .product-inner {
    gap: 32px;
  }
  .product-thumbs {
    flex-wrap: wrap;
  }
  .thumb-btn {
    width: 60px;
    height: 60px;
  }

  .product-cta-row {
    flex-direction: column;
    align-items: flex-start;
  }

  /* Battery */
  .battery-inner {
    gap: 40px;
  }
  .battery-specs {
    flex-wrap: wrap;
    gap: 20px;
  }

  /* Footer */
  .footer-top {
    flex-direction: column;
    gap: 40px;
  }

  .footer-links {
    flex-wrap: wrap;
    gap: 32px;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }

  .tagline-text {
    font-size: clamp(40px, 12vw, 72px);
  }
}

@media (max-width: 480px) {
  .nav-inner {
    padding: 0 20px;
  }
  .hero-content-inner {
    padding: 0 20px;
  }
  .hero-cta-group {
    flex-direction: column;
    align-items: flex-start;
  }
  .comparison-table {
    font-size: 12px;
  }
  .section-title {
    font-size: 28px;
  }
  .hero-awards {
    display: none;
  }
  .photo-strip-item {
    width: 220px;
    height: 160px;
  }
}