/* ========================================
   CryptoVault - Main Stylesheet
   Premium Light Theme - Clean & Modern
   Mobile-First Responsive
   ======================================== */

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

:root {
  --bg: #ffffff;
  --bg-elevated: #f5f5f7;
  --bg-card: #ffffff;
  --bg-card-hover: #fafafa;

  --brand: #00C853;
  --brand-dim: rgba(0, 200, 83, 0.08);
  --brand-text: #00A844;

  --text-1: #1d1d1f;
  --text-2: #6e6e73;
  --text-3: #86868b;

  --border: rgba(0, 0, 0, 0.08);
  --border-hover: rgba(0, 0, 0, 0.15);

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;

  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --duration: 0.3s;
  --duration-slow: 0.6s;

  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --max-w: 1200px;
  --px: 20px;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text-1);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: none; outline: none; background: none; }
ul, ol { list-style: none; }

/* === Layout === */
.container {
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--px);
}

.section {
  padding: 80px 0;
}

.section-label {
  font-size: 13px;
  font-weight: 500;
  color: var(--brand-text);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 12px;
}

.section-heading {
  font-size: clamp(28px, 5vw, 48px);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.section-desc {
  font-size: clamp(15px, 2vw, 17px);
  color: var(--text-2);
  line-height: 1.7;
  max-width: 520px;
}

/* === Navigation === */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.72);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 56px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 17px;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.nav-logo-mark {
  width: 28px;
  height: 28px;
  background: var(--brand);
  border-radius: 7px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.nav-logo-mark svg {
  width: 16px;
  height: 16px;
  fill: #000;
}

.nav-links {
  display: none;
  gap: 28px;
}

.nav-links a {
  font-size: 13px;
  font-weight: 400;
  color: var(--text-2);
  transition: color var(--duration) var(--ease);
}

.nav-links a:hover {
  color: var(--text-1);
}

.nav-cta {
  display: none;
}

.btn-nav {
  padding: 8px 18px;
  background: var(--text-1);
  color: #000;
  font-weight: 500;
  font-size: 13px;
  border-radius: 100px;
  transition: all var(--duration) var(--ease);
  min-height: 36px;
  display: inline-flex;
  align-items: center;
}

.btn-nav:hover {
  background: var(--brand);
  color: #000;
}

/* Hamburger */
.hamburger {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: 10px;
  min-width: 44px;
  min-height: 44px;
  align-items: center;
  justify-content: center;
}

.hamburger span {
  display: block;
  width: 20px;
  height: 1.5px;
  background: var(--text-1);
  border-radius: 1px;
  transition: all var(--duration) var(--ease);
}

.hamburger.active span:nth-child(1) {
  transform: rotate(45deg) translate(4.5px, 4.5px);
}
.hamburger.active span:nth-child(2) {
  opacity: 0;
}
.hamburger.active span:nth-child(3) {
  transform: rotate(-45deg) translate(4.5px, -4.5px);
}

/* Mobile Menu */
.mobile-menu {
  position: fixed;
  top: 56px;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  display: flex;
  flex-direction: column;
  padding: 24px var(--px) 40px;
  transform: translateX(100%);
  transition: transform var(--duration) var(--ease);
  z-index: 999;
}

.mobile-menu.active {
  transform: translateX(0);
}

.mobile-menu a {
  font-size: 20px;
  font-weight: 500;
  padding: 16px 0;
  border-bottom: 1px solid var(--border);
  color: var(--text-2);
  transition: color var(--duration) var(--ease);
  min-height: 44px;
  display: flex;
  align-items: center;
}

.mobile-menu a:hover {
  color: var(--text-1);
}

.mobile-menu .mobile-cta {
  margin-top: 24px;
  padding: 14px 28px;
  background: var(--text-1);
  color: #000;
  font-weight: 500;
  font-size: 16px;
  border-radius: 100px;
  text-align: center;
  min-height: 44px;
  border: none;
}

/* === Hero === */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  padding: 80px 0 40px;
  text-align: center;
  overflow: hidden;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: var(--brand-dim);
  border-radius: 100px;
  font-size: 12px;
  font-weight: 500;
  color: var(--brand-text);
  margin-bottom: 16px;
}

.hero-eyebrow-dot {
  width: 5px;
  height: 5px;
  background: var(--brand);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

.hero-title {
  font-size: clamp(32px, 7vw, 64px);
  font-weight: 600;
  line-height: 1.08;
  letter-spacing: -0.03em;
  margin-bottom: 16px;
  max-width: 600px;
}

.hero-title .accent {
  color: var(--text-3);
}

.hero-subtitle {
  font-size: clamp(14px, 2.5vw, 17px);
  color: var(--text-2);
  max-width: 420px;
  margin: 0 auto 24px;
  line-height: 1.6;
  font-weight: 400;
}

.hero-actions {
  display: flex;
  flex-direction: column;
  gap: 10px;
  align-items: center;
  margin-bottom: 32px;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 32px;
  background: var(--brand);
  color: #000;
  font-weight: 600;
  font-size: 15px;
  border-radius: 100px;
  transition: all var(--duration) var(--ease);
  min-height: 44px;
  width: 100%;
  max-width: 260px;
}

.btn-primary:hover {
  background: #00e676;
  box-shadow: 0 4px 20px rgba(0, 200, 83, 0.3);
  transform: translateY(-1px);
}

.btn-ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 14px 32px;
  color: var(--text-1);
  font-weight: 500;
  font-size: 15px;
  border-radius: 100px;
  border: 1px solid var(--border-hover);
  transition: all var(--duration) var(--ease);
  min-height: 44px;
  width: 100%;
  max-width: 260px;
}

.btn-ghost:hover {
  border-color: var(--text-2);
  background: rgba(0,0,0,0.04);
}

.hero-video {
  width: 100%;
  max-width: 720px;
  margin: 0 auto;
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--bg-card);
  border: 1px solid var(--border);
  aspect-ratio: 16 / 9;
}

.hero-video video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-video::after {
  content: '';
  position: absolute;
  bottom: -40px;
  left: 50%;
  transform: translateX(-50%);
  width: 80%;
  height: 80px;
  background: radial-gradient(ellipse, rgba(0, 230, 118, 0.06) 0%, transparent 70%);
  filter: blur(20px);
  pointer-events: none;
}

.hero-trust {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  flex-wrap: wrap;
}

.hero-trust-item {
  text-align: center;
}

.hero-trust-value {
  font-size: 22px;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.hero-trust-label {
  font-size: 12px;
  color: var(--text-3);
  margin-top: 2px;
}

/* === Video === */
.video-section {
  padding: 40px 0 80px;
}

.hero-video,
.video-wrapper {
  position: relative;
  border-radius: var(--radius-xl);
  overflow: hidden;
  background: var(--bg-card);
  border: 1px solid var(--border);
  aspect-ratio: 16 / 9;
}

.hero-video video,
.video-wrapper video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.video-controls {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 16px 20px;
  background: linear-gradient(transparent, rgba(0,0,0,0.7));
  display: flex;
  align-items: center;
  gap: 12px;
  opacity: 0;
  transition: opacity var(--duration) var(--ease);
}

.hero-video:hover .video-controls,
.hero-video.show-controls .video-controls,
.video-wrapper:hover .video-controls,
.video-wrapper.show-controls .video-controls {
  opacity: 1;
}

.video-play-btn {
  width: 44px;
  height: 44px;
  background: rgba(255,255,255,0.12);
  backdrop-filter: blur(10px);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--duration) var(--ease);
  flex-shrink: 0;
}

.video-play-btn:hover {
  background: rgba(255,255,255,0.2);
}

.video-play-btn svg {
  width: 16px;
  height: 16px;
  fill: #fff;
}

.video-progress {
  flex: 1;
  height: 3px;
  background: rgba(255,255,255,0.15);
  border-radius: 2px;
  overflow: hidden;
  cursor: pointer;
}

.video-progress-bar {
  height: 100%;
  background: var(--brand);
  border-radius: 2px;
  width: 0%;
  transition: width 0.1s linear;
}

.video-time {
  font-size: 12px;
  color: rgba(255,255,255,0.6);
  font-variant-numeric: tabular-nums;
  flex-shrink: 0;
}

.video-placeholder {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  background: var(--bg-card);
}

.video-placeholder-ring {
  width: 56px;
  height: 56px;
  border: 1.5px solid var(--border);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.video-placeholder-ring svg {
  width: 20px;
  height: 20px;
  fill: var(--text-2);
}

.video-placeholder-text {
  font-size: 13px;
  color: var(--text-3);
}

/* === Products === */
.products-section {
  padding: 100px 0;
}

.products-header {
  text-align: center;
  margin-bottom: 56px;
}

.products-header .section-desc {
  margin: 0 auto;
}

.products-showcase {
  margin-bottom: 48px;
  text-align: center;
}

.products-showcase img {
  width: 100%;
  max-width: 800px;
  margin: 0 auto;
  border-radius: var(--radius-lg);
}

.products-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.product-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  transition: all var(--duration) var(--ease);
  display: flex;
  flex-direction: column;
}

.product-card:hover {
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
}

.product-card-badge {
  display: inline-block;
  padding: 4px 10px;
  background: var(--brand-dim);
  color: var(--brand-text);
  font-size: 11px;
  font-weight: 600;
  border-radius: 100px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 16px;
  align-self: flex-start;
}

.product-card-badge.new {
  background: rgba(0, 122, 255, 0.1);
  color: #007aff;
}

.product-card-image {
  width: 100%;
  aspect-ratio: 1;
  border-radius: 12px;
  overflow: hidden;
  margin-bottom: 20px;
  background: var(--bg-elevated);
}

.product-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.product-card:hover .product-card-image img {
  transform: scale(1.05);
}

.product-card-brand {
  font-size: 12px;
  font-weight: 500;
  color: var(--text-2);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 4px;
}

.product-card-name {
  font-size: 22px;
  font-weight: 600;
  margin-bottom: 8px;
  letter-spacing: -0.01em;
}

.product-card-desc {
  font-size: 14px;
  color: var(--text-2);
  line-height: 1.6;
  margin-bottom: 20px;
}

.product-card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 24px;
}

.product-tag {
  padding: 4px 10px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 100px;
  font-size: 12px;
  color: var(--text-2);
}

.product-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: auto;
  padding-top: 20px;
  border-top: 1px solid var(--border);
}

.product-price {
  font-size: 24px;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.product-price span {
  font-size: 13px;
  color: var(--text-3);
  font-weight: 400;
  margin-left: 2px;
}

.btn-buy {
  padding: 10px 20px;
  background: var(--text-1);
  color: #000;
  font-weight: 500;
  font-size: 13px;
  border-radius: 100px;
  transition: all var(--duration) var(--ease);
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}

.btn-buy:hover {
  background: var(--brand);
}

/* === Features === */
.features-section {
  padding: 100px 0;
  background: var(--bg-elevated);
}

.features-header {
  text-align: center;
  margin-bottom: 56px;
}

.features-header .section-desc {
  margin: 0 auto;
}

.features-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.feature-item {
  padding: 32px 24px;
  background: var(--bg-card);
  transition: background var(--duration) var(--ease);
}

.feature-item:hover {
  background: var(--bg-card-hover);
}

.feature-icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  border-radius: 10px;
  background: var(--brand-dim);
}

.feature-icon svg {
  width: 20px;
  height: 20px;
  stroke: var(--brand-text);
  fill: none;
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.feature-title {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 6px;
  letter-spacing: -0.01em;
}

.feature-desc {
  font-size: 14px;
  color: var(--text-2);
  line-height: 1.6;
}

/* === Security === */
.security-section {
  padding: 100px 0;
}

.security-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  align-items: center;
}

.security-visual {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
}

.security-visual img {
  width: 100%;
  height: auto;
  display: block;
}

.security-body .section-label {
  text-align: left;
}

.security-body h3 {
  font-size: clamp(24px, 4vw, 40px);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.security-body p {
  font-size: 15px;
  color: var(--text-2);
  line-height: 1.7;
  margin-bottom: 28px;
}

.security-checks {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.security-check {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 14px;
  color: var(--text-2);
}

.security-check-dot {
  width: 18px;
  height: 18px;
  min-width: 18px;
  border-radius: 50%;
  background: var(--brand-dim);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 2px;
}

.security-check-dot svg {
  width: 10px;
  height: 10px;
  stroke: var(--brand-text);
  fill: none;
  stroke-width: 2.5;
}

/* === Chains === */
.chains-section {
  padding: 100px 0;
  background: var(--bg-elevated);
}

.chains-header {
  text-align: center;
  margin-bottom: 48px;
}

.chains-header .section-desc {
  margin: 0 auto;
}

.chains-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}

.chain-chip {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 18px 8px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  transition: all var(--duration) var(--ease);
}

.chain-chip:hover {
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
}

.chain-icon {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-elevated);
  padding: 6px;
}

.chain-icon svg {
  width: 28px;
  height: 28px;
}

.chain-icon-plus {
  font-size: 18px;
  font-weight: 600;
  border-radius: 50%;
}

.chain-name {
  font-size: 11px;
  color: var(--text-2);
  text-align: center;
  font-weight: 500;
}

/* === FAQ === */
.faq-section {
  padding: 100px 0;
}

.faq-header {
  text-align: center;
  margin-bottom: 48px;
}

.faq-header .section-desc {
  margin: 0 auto;
}

.faq-list {
  max-width: 680px;
  margin: 0 auto;
}

.faq-item {
  border-bottom: 1px solid var(--border);
}

.faq-item:first-child {
  border-top: 1px solid var(--border);
}

.faq-q {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 0;
  font-size: 15px;
  font-weight: 500;
  cursor: pointer;
  min-height: 44px;
  transition: color var(--duration) var(--ease);
  gap: 16px;
  text-align: left;
}

.faq-q:hover {
  color: var(--brand-text);
}

.faq-q-icon {
  width: 20px;
  height: 20px;
  min-width: 20px;
  position: relative;
}

.faq-q-icon::before,
.faq-q-icon::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 12px;
  height: 1.5px;
  background: var(--text-2);
  transition: transform var(--duration) var(--ease);
}

.faq-q-icon::before {
  transform: translate(-50%, -50%);
}

.faq-q-icon::after {
  transform: translate(-50%, -50%) rotate(90deg);
}

.faq-item.active .faq-q-icon::after {
  transform: translate(-50%, -50%) rotate(0deg);
}

.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s var(--ease);
}

.faq-item.active .faq-a {
  max-height: 200px;
}

.faq-a-inner {
  padding: 0 0 20px;
  font-size: 14px;
  color: var(--text-2);
  line-height: 1.7;
}

/* === CTA === */
.cta-section {
  padding: 100px 0;
  background: var(--bg-elevated);
}

.cta-card {
  text-align: center;
  padding: 56px 24px;
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  position: relative;
  overflow: hidden;
  background: radial-gradient(ellipse at top, rgba(0, 230, 118, 0.03) 0%, transparent 60%);
}

.cta-card h2 {
  font-size: clamp(24px, 5vw, 40px);
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}

.cta-card p {
  font-size: 15px;
  color: var(--text-2);
  max-width: 400px;
  margin: 0 auto 28px;
  line-height: 1.6;
}

.cta-btns {
  display: flex;
  flex-direction: column;
  gap: 10px;
  align-items: center;
}

/* === Footer === */
.footer {
  padding: 48px 0 24px;
  border-top: 1px solid var(--border);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  margin-bottom: 40px;
}

.footer-brand-desc {
  font-size: 13px;
  color: var(--text-3);
  margin-top: 12px;
  line-height: 1.6;
  max-width: 280px;
}

.footer-col-title {
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 14px;
  color: var(--text-1);
}

.footer-col a {
  display: block;
  font-size: 13px;
  color: var(--text-3);
  padding: 5px 0;
  transition: color var(--duration) var(--ease);
}

.footer-col a:hover {
  color: var(--text-1);
}

.footer-bottom {
  display: flex;
  flex-direction: column;
  gap: 16px;
  align-items: center;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  font-size: 12px;
  color: var(--text-3);
}

.footer-socials {
  display: flex;
  gap: 12px;
}

.footer-socials a {
  width: 32px;
  height: 32px;
  border: 1px solid var(--border);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--duration) var(--ease);
}

.footer-socials a:hover {
  border-color: var(--border-hover);
  background: var(--bg-elevated);
}

.footer-socials svg {
  width: 14px;
  height: 14px;
  fill: var(--text-3);
}

.footer-socials a:hover svg {
  fill: var(--text-1);
}

/* === Animations === */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity var(--duration-slow) var(--ease), transform var(--duration-slow) var(--ease);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* === Responsive: Tablet 768+ === */
@media (min-width: 768px) {
  :root {
    --px: 32px;
  }

  .section {
    padding: 100px 0;
  }

  .hero {
    padding: 80px 0 48px;
  }

  .hero-actions {
    flex-direction: row;
    justify-content: center;
  }

  .btn-primary, .btn-ghost {
    width: auto;
  }

  .hero-video {
    max-width: 800px;
  }

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

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

  .security-layout {
    grid-template-columns: 1fr 1fr;
    gap: 56px;
  }

  .chains-grid {
    grid-template-columns: repeat(4, 1fr);
  }

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

  .footer-bottom {
    flex-direction: row;
    justify-content: space-between;
  }

  .cta-btns {
    flex-direction: row;
    justify-content: center;
  }
}

/* === Responsive: Desktop 1024+ === */
@media (min-width: 1024px) {
  .nav-links {
    display: flex;
  }

  .nav-cta {
    display: block;
  }

  .hamburger {
    display: none;
  }

  .hero {
    min-height: 100vh;
    padding: 80px 0 48px;
  }

  .hero-video {
    max-width: 900px;
  }

  .products-grid {
    grid-template-columns: repeat(3, 1fr);
  }

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

  .chains-grid {
    grid-template-columns: repeat(6, 1fr);
  }

  .section {
    padding: 120px 0;
  }

  .products-section,
  .features-section,
  .security-section,
  .chains-section,
  .faq-section,
  .cta-section {
    padding: 120px 0;
  }
}

/* === Responsive: Large 1440+ === */
@media (min-width: 1440px) {
  .features-grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .hero-title {
    font-size: 72px;
  }
}