/* ===== CSS Variables ===== */
:root {
  --color-primary: #0a0a0a;
  --color-secondary: #E84D8A;
  --color-accent: #D1D1D1;
  --color-surface: #2A2A2A;
  --color-bg: #0a0a0a;
  --color-text: #f0f0f0;
  --color-text-muted: #a0a0a0;
  --color-white: #ffffff;
  --color-gradient-start: #E84D8A;
  --color-gradient-end: #b83d6e;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 20px rgba(0,0,0,0.4);
  --shadow-lg: 0 8px 40px rgba(0,0,0,0.5);
  --transition: 0.3s ease;
  --max-width: 1200px;
}

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

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

body {
  font-family: 'Inter', 'Noto Sans SC', 'Noto Sans JP', 'Noto Sans KR', sans-serif;
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

a {
  text-decoration: none;
  color: inherit;
  transition: color var(--transition);
}

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

ul, ol {
  list-style: none;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== Animations ===== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.05); }
}

.animate-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.animate-on-scroll.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===== Header / Navbar ===== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 16px 0;
  transition: all var(--transition);
  background: transparent;
}

.navbar.scrolled {
  background: rgba(10, 10, 10, 0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  padding: 10px 0;
  box-shadow: 0 2px 20px rgba(0,0,0,0.3);
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--color-white);
}

.nav-brand img {
  width: 32px;
  height: 32px;
  border-radius: 6px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-links a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-accent);
  display: flex;
  align-items: center;
  gap: 6px;
  transition: color var(--transition);
}

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

.nav-links a i {
  font-size: 0.85rem;
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 16px;
}

/* Language Switcher */
.lang-switcher {
  position: relative;
}

.lang-switcher-btn {
  background: none;
  border: 1px solid rgba(255,255,255,0.15);
  color: var(--color-accent);
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 0.85rem;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: all var(--transition);
  font-family: inherit;
}

.lang-switcher-btn:hover {
  border-color: var(--color-secondary);
  color: var(--color-white);
}

.lang-dropdown {
  position: absolute;
  top: 100%;
  right: 0;
  margin-top: 8px;
  background: rgba(30, 30, 30, 0.98);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius-md);
  padding: 8px 0;
  min-width: 160px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all var(--transition);
  box-shadow: var(--shadow-lg);
  z-index: 100;
}

.lang-dropdown.active {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.lang-dropdown a {
  display: block;
  padding: 8px 18px;
  font-size: 0.85rem;
  color: var(--color-accent);
  transition: all var(--transition);
}

.lang-dropdown a:hover,
.lang-dropdown a.current {
  background: rgba(232, 77, 138, 0.1);
  color: var(--color-secondary);
}

/* CTA Button */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: linear-gradient(135deg, var(--color-gradient-start), var(--color-gradient-end));
  color: var(--color-white);
  padding: 10px 24px;
  border-radius: 50px;
  font-weight: 600;
  font-size: 0.9rem;
  border: none;
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 25px rgba(232, 77, 138, 0.4);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: transparent;
  color: var(--color-secondary);
  padding: 10px 24px;
  border-radius: 50px;
  font-weight: 600;
  font-size: 0.9rem;
  border: 2px solid var(--color-secondary);
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
}

.btn-secondary:hover {
  background: rgba(232, 77, 138, 0.1);
  transform: translateY(-2px);
}

.btn-large {
  padding: 16px 40px;
  font-size: 1.1rem;
}

/* Mobile Menu Toggle */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--color-white);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 4px;
}

/* Mobile Nav */
.mobile-nav {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(10, 10, 10, 0.98);
  backdrop-filter: blur(20px);
  z-index: 999;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 32px;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition);
}

.mobile-nav.active {
  display: flex;
  opacity: 1;
  visibility: visible;
}

.mobile-nav a {
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--color-accent);
  transition: color var(--transition);
}

.mobile-nav a:hover {
  color: var(--color-secondary);
}

.mobile-nav-close {
  position: absolute;
  top: 20px;
  right: 24px;
  background: none;
  border: none;
  color: var(--color-white);
  font-size: 2rem;
  cursor: pointer;
}

.mobile-lang-list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  margin-top: 8px;
}

.mobile-lang-list a {
  font-size: 0.9rem;
  padding: 6px 14px;
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: var(--radius-sm);
}

/* ===== Hero Section ===== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 120px 24px 80px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(ellipse at 50% 0%, rgba(232, 77, 138, 0.12) 0%, transparent 60%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 800px;
  animation: fadeInUp 0.8s ease;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(232, 77, 138, 0.15);
  color: var(--color-secondary);
  padding: 6px 18px;
  border-radius: 50px;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 24px;
  border: 1px solid rgba(232, 77, 138, 0.25);
}

.hero h1 {
  font-size: 3.5rem;
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 20px;
  background: linear-gradient(135deg, var(--color-white) 0%, var(--color-accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero h1 span {
  background: linear-gradient(135deg, var(--color-gradient-start), var(--color-gradient-end));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: 1.2rem;
  color: var(--color-text-muted);
  margin-bottom: 36px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.8;
}

.hero-buttons {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

/* ===== Section Shared ===== */
.section {
  padding: 100px 0;
}

.section-alt {
  background: rgba(255,255,255,0.02);
}

.section-title {
  text-align: center;
  margin-bottom: 60px;
}

.section-title h2 {
  font-size: 2.4rem;
  font-weight: 800;
  margin-bottom: 16px;
  background: linear-gradient(135deg, var(--color-white), var(--color-accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-title p {
  font-size: 1.05rem;
  color: var(--color-text-muted);
  max-width: 600px;
  margin: 0 auto;
}

/* ===== Features ===== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 48px;
}

.feature-card {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: var(--radius-md);
  padding: 36px 28px;
  transition: all var(--transition);
}

.feature-card:hover {
  background: rgba(255,255,255,0.07);
  border-color: rgba(232, 77, 138, 0.2);
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.feature-icon {
  width: 52px;
  height: 52px;
  background: rgba(232, 77, 138, 0.12);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  color: var(--color-secondary);
  font-size: 1.3rem;
}

.feature-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--color-white);
}

.feature-card p {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}

.features-cta {
  text-align: center;
}

/* ===== Use Cases ===== */
.usecases-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.usecase-card {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: var(--radius-md);
  padding: 32px 24px;
  text-align: center;
  transition: all var(--transition);
}

.usecase-card:hover {
  background: rgba(255,255,255,0.07);
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.usecase-card:nth-child(1) .usecase-icon { color: #E84D8A; background: rgba(232, 77, 138, 0.12); }
.usecase-card:nth-child(2) .usecase-icon { color: #8B5CF6; background: rgba(139, 92, 246, 0.12); }
.usecase-card:nth-child(3) .usecase-icon { color: #06B6D4; background: rgba(6, 182, 212, 0.12); }
.usecase-card:nth-child(4) .usecase-icon { color: #F59E0B; background: rgba(245, 158, 11, 0.12); }

.usecase-icon {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  font-size: 1.5rem;
}

.usecase-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--color-white);
}

.usecase-card p {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* ===== Pricing ===== */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  align-items: start;
}

.pricing-card {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  text-align: center;
  position: relative;
  transition: all var(--transition);
}

.pricing-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.pricing-card.popular {
  border-color: var(--color-secondary);
  background: rgba(232, 77, 138, 0.06);
  transform: scale(1.03);
}

.pricing-card.popular:hover {
  transform: scale(1.03) translateY(-4px);
}

.pricing-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, var(--color-gradient-start), var(--color-gradient-end));
  color: var(--color-white);
  padding: 4px 20px;
  border-radius: 50px;
  font-size: 0.8rem;
  font-weight: 700;
  white-space: nowrap;
}

.pricing-card h3 {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--color-white);
}

.pricing-price {
  font-size: 3rem;
  font-weight: 800;
  color: var(--color-white);
  margin: 16px 0;
}

.pricing-price span {
  font-size: 1rem;
  font-weight: 400;
  color: var(--color-text-muted);
}

.pricing-desc {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  margin-bottom: 24px;
}

.pricing-features {
  text-align: left;
  margin-bottom: 32px;
}

.pricing-features li {
  padding: 8px 0;
  font-size: 0.9rem;
  color: var(--color-text-muted);
  display: flex;
  align-items: center;
  gap: 10px;
}

.pricing-features li i.fa-check {
  color: var(--color-secondary);
}

.pricing-features li i.fa-xmark {
  color: #555;
}

.pricing-card .btn-primary,
.pricing-card .btn-secondary {
  width: 100%;
  justify-content: center;
}

/* ===== Testimonials ===== */
.testimonials-header {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 40px;
  margin-bottom: 48px;
  flex-wrap: wrap;
}

.rating-overview {
  text-align: center;
}

.rating-score {
  font-size: 3.5rem;
  font-weight: 800;
  color: var(--color-white);
  line-height: 1;
}

.rating-stars {
  color: #F59E0B;
  font-size: 1.2rem;
  margin: 8px 0;
  display: flex;
  gap: 4px;
  justify-content: center;
}

.rating-count {
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

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

.star-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.star-bar-fill {
  width: 120px;
  height: 6px;
  background: rgba(255,255,255,0.1);
  border-radius: 3px;
  overflow: hidden;
}

.star-bar-fill div {
  height: 100%;
  background: #F59E0B;
  border-radius: 3px;
}

.testimonials-carousel {
  position: relative;
  overflow: hidden;
}

.testimonials-track {
  display: flex;
  transition: transform 0.5s ease;
}

.testimonial-card {
  min-width: 100%;
  padding: 0 24px;
}

@media (min-width: 768px) {
  .testimonial-card {
    min-width: 50%;
  }
}

@media (min-width: 1024px) {
  .testimonial-card {
    min-width: 33.333%;
  }
}

.testimonial-inner {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: var(--radius-md);
  padding: 28px;
  height: 100%;
}

.testimonial-stars {
  color: #F59E0B;
  margin-bottom: 16px;
  font-size: 0.9rem;
}

.testimonial-text {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: 20px;
  font-style: italic;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 12px;
}

.testimonial-avatar {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-gradient-start), var(--color-gradient-end));
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-white);
  font-weight: 700;
  font-size: 1rem;
}

.testimonial-name {
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--color-white);
}

.testimonial-role {
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.carousel-controls {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-top: 32px;
}

.carousel-btn {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid rgba(255,255,255,0.15);
  background: rgba(255,255,255,0.05);
  color: var(--color-white);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
  font-size: 1rem;
}

.carousel-btn:hover {
  border-color: var(--color-secondary);
  background: rgba(232, 77, 138, 0.15);
}

.testimonial-tags {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin-top: 32px;
}

.testimonial-tag {
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.08);
  padding: 6px 16px;
  border-radius: 50px;
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

/* ===== Comparison ===== */
.comparison-table-wrapper {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 600px;
}

.comparison-table thead th {
  padding: 16px 20px;
  text-align: center;
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--color-white);
  background: rgba(255,255,255,0.04);
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.comparison-table thead th:first-child {
  text-align: left;
  border-radius: var(--radius-md) 0 0 0;
}

.comparison-table thead th:last-child {
  border-radius: 0 var(--radius-md) 0 0;
}

.comparison-table thead th.highlight {
  background: rgba(232, 77, 138, 0.12);
  color: var(--color-secondary);
}

.comparison-table tbody td {
  padding: 14px 20px;
  text-align: center;
  font-size: 0.9rem;
  color: var(--color-text-muted);
  border-bottom: 1px solid rgba(255,255,255,0.04);
}

.comparison-table tbody td:first-child {
  text-align: left;
  font-weight: 600;
  color: var(--color-text);
}

.comparison-table tbody td.highlight {
  background: rgba(232, 77, 138, 0.05);
  color: var(--color-white);
}

.comparison-table tbody td .fa-check {
  color: var(--color-secondary);
}

.comparison-table tbody td .fa-xmark {
  color: #555;
}

/* ===== FAQ ===== */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  overflow: hidden;
  transition: all var(--transition);
}

.faq-item:hover {
  border-color: rgba(255,255,255,0.12);
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  cursor: pointer;
  background: rgba(255,255,255,0.03);
  transition: all var(--transition);
  width: 100%;
  border: none;
  color: var(--color-white);
  font-family: inherit;
  font-size: 1rem;
  font-weight: 600;
  text-align: left;
}

.faq-question:hover {
  background: rgba(255,255,255,0.06);
}

.faq-question i {
  color: var(--color-secondary);
  transition: transform var(--transition);
  font-size: 0.9rem;
  flex-shrink: 0;
  margin-left: 16px;
}

.faq-item.active .faq-question i {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
}

.faq-answer-inner {
  padding: 0 24px 20px;
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.8;
}

/* ===== Final CTA ===== */
.final-cta {
  background: linear-gradient(135deg, rgba(232, 77, 138, 0.15), rgba(184, 61, 110, 0.1));
  border-top: 1px solid rgba(232, 77, 138, 0.15);
  border-bottom: 1px solid rgba(232, 77, 138, 0.15);
  text-align: center;
  padding: 100px 24px;
  position: relative;
  overflow: hidden;
}

.final-cta::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(ellipse at center, rgba(232, 77, 138, 0.08) 0%, transparent 70%);
  pointer-events: none;
}

.final-cta-content {
  position: relative;
  z-index: 1;
}

.final-cta h2 {
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: 16px;
  color: var(--color-white);
}

.final-cta p {
  font-size: 1.1rem;
  color: var(--color-text-muted);
  margin-bottom: 36px;
}

/* ===== Footer ===== */
.footer {
  background: rgba(255,255,255,0.02);
  border-top: 1px solid rgba(255,255,255,0.06);
  padding: 60px 0 30px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-white);
}

.footer-brand img {
  width: 28px;
  height: 28px;
  border-radius: 6px;
}

.footer-desc {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  line-height: 1.7;
  max-width: 300px;
}

.footer h4 {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.footer-links a {
  display: block;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  padding: 4px 0;
  transition: color var(--transition);
}

.footer-links a:hover {
  color: var(--color-secondary);
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.06);
  padding-top: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-copyright {
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.footer-legal {
  display: flex;
  gap: 20px;
}

.footer-legal a {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  transition: color var(--transition);
}

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

/* ===== Back to Top ===== */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, var(--color-gradient-start), var(--color-gradient-end));
  border: none;
  border-radius: 50%;
  color: var(--color-white);
  font-size: 1.1rem;
  cursor: pointer;
  z-index: 900;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all var(--transition);
  box-shadow: 0 4px 15px rgba(232, 77, 138, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 25px rgba(232, 77, 138, 0.5);
}

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

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

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

  .pricing-card.popular {
    transform: scale(1);
  }

  .pricing-card.popular:hover {
    transform: translateY(-4px);
  }

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

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }

  .nav-right .btn-primary {
    display: none;
  }

  .menu-toggle {
    display: block;
  }

  .hero h1 {
    font-size: 2.2rem;
  }

  .hero p {
    font-size: 1rem;
  }

  .section {
    padding: 60px 0;
  }

  .section-title h2 {
    font-size: 1.8rem;
  }

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

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

  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 400px;
    margin-left: auto;
    margin-right: auto;
  }

  .testimonials-header {
    flex-direction: column;
    gap: 24px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }

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

  .final-cta h2 {
    font-size: 1.8rem;
  }

  .hero {
    min-height: auto;
    padding: 140px 24px 60px;
  }

  .lang-switcher {
    display: none;
  }
}

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

  .btn-large {
    padding: 14px 28px;
    font-size: 1rem;
  }
}