/* ==================== CSS Variables ==================== */
:root {
  --color-primary: #0d0d0d;
  --color-secondary: #0d0d0d;
  --color-accent: #E91E63;
  --color-purple: #9333EA;
  --color-red: #FF3B5C;
  --color-bg: #0a0a0a;
  --color-bg-secondary: #111111;
  --color-bg-card: #161616;
  --color-bg-card-hover: #1c1c1c;
  --color-text: #f0f0f0;
  --color-text-secondary: #a0a0a0;
  --color-text-muted: #666666;
  --color-border: #2a2a2a;
  --color-border-hover: #3a3a3a;
  --gradient-accent: linear-gradient(135deg, #E91E63, #9333EA);
  --gradient-accent-reverse: linear-gradient(135deg, #9333EA, #E91E63);
  --gradient-hero: linear-gradient(180deg, #0d0d0d 0%, #1a0a1a 50%, #0d0d0d 100%);
  --gradient-cta: linear-gradient(135deg, #E91E63, #FF3B5C, #9333EA);
  --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);
  --shadow-glow: 0 0 30px rgba(233, 30, 99, 0.15);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Noto Sans SC', 'Noto Sans JP', 'Noto Sans KR', sans-serif;
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
}

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

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

body {
  font-family: var(--font-body);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

ul, ol {
  list-style: none;
}

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

/* ==================== Utility Classes ==================== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 100px 0;
}

.section-title {
  font-size: 2.5rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--color-text-secondary);
  text-align: center;
  max-width: 600px;
  margin: 0 auto 60px;
}

.gradient-text {
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ==================== Buttons ==================== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: 50px;
  font-size: 1rem;
  font-weight: 600;
  transition: all var(--transition-normal);
  white-space: nowrap;
}

.btn-primary {
  background: var(--gradient-accent);
  color: #fff;
  box-shadow: 0 4px 20px rgba(233, 30, 99, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 30px rgba(233, 30, 99, 0.45);
}

.btn-secondary {
  background: transparent;
  color: var(--color-accent);
  border: 2px solid var(--color-accent);
}

.btn-secondary:hover {
  background: rgba(233, 30, 99, 0.1);
  transform: translateY(-2px);
}

.btn-sm {
  padding: 10px 24px;
  font-size: 0.9rem;
}

.btn-lg {
  padding: 18px 42px;
  font-size: 1.15rem;
}

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

.header.scrolled {
  background: rgba(13, 13, 13, 0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-border);
  padding: 10px 0;
}

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

.header-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.3rem;
  font-weight: 700;
}

.header-logo img {
  width: 32px;
  height: 32px;
  border-radius: 6px;
}

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

.nav a {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: 8px;
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  transition: all var(--transition-fast);
}

.nav a:hover {
  color: var(--color-text);
  background: rgba(255, 255, 255, 0.05);
}

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

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

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

.lang-switcher-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border-radius: 8px;
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.lang-switcher-btn:hover {
  color: var(--color-text);
  background: rgba(255, 255, 255, 0.05);
}

.lang-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 8px;
  min-width: 160px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all var(--transition-fast);
  box-shadow: var(--shadow-lg);
}

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

.lang-dropdown a {
  display: block;
  padding: 8px 14px;
  border-radius: 6px;
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  transition: all var(--transition-fast);
}

.lang-dropdown a:hover,
.lang-dropdown a.active {
  background: rgba(233, 30, 99, 0.1);
  color: var(--color-accent);
}

/* Mobile Menu */
.mobile-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  cursor: pointer;
}

.mobile-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: all var(--transition-normal);
}

.mobile-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.mobile-toggle.active span:nth-child(2) {
  opacity: 0;
}

.mobile-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

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

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

.mobile-nav a {
  font-size: 1.3rem;
  color: var(--color-text-secondary);
  padding: 12px 24px;
  transition: color var(--transition-fast);
}

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

.mobile-nav .lang-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
  margin-top: 20px;
  padding: 0 20px;
}

.mobile-nav .lang-links a {
  font-size: 0.9rem;
  padding: 6px 12px;
  border: 1px solid var(--color-border);
  border-radius: 6px;
}

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

.hero::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(233, 30, 99, 0.08) 0%, rgba(147, 51, 234, 0.05) 40%, transparent 70%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 800px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 20px;
  border-radius: 50px;
  border: 1px solid rgba(233, 30, 99, 0.3);
  background: rgba(233, 30, 99, 0.08);
  font-size: 0.85rem;
  color: var(--color-accent);
  margin-bottom: 28px;
}

.hero h1 {
  font-size: 4rem;
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 20px;
}

.hero p {
  font-size: 1.25rem;
  color: var(--color-text-secondary);
  max-width: 600px;
  margin: 0 auto 36px;
  line-height: 1.8;
}

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

.hero-stats {
  display: flex;
  justify-content: center;
  gap: 48px;
  margin-top: 60px;
  padding-top: 40px;
  border-top: 1px solid var(--color-border);
}

.hero-stat {
  text-align: center;
}

.hero-stat .number {
  display: block;
  font-size: 2rem;
  font-weight: 700;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-stat .label {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-top: 4px;
}

/* ==================== Features Section ==================== */
.features {
  background: var(--color-bg-secondary);
}

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

.feature-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  transition: all var(--transition-normal);
}

.feature-card:hover {
  background: var(--color-bg-card-hover);
  border-color: var(--color-border-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
}

.feature-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  background: rgba(233, 30, 99, 0.1);
  margin-bottom: 20px;
}

.feature-icon i {
  font-size: 1.4rem;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.feature-card h3 {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 10px;
}

.feature-card p {
  color: var(--color-text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
}

.features .section-cta {
  text-align: center;
  margin-top: 48px;
}

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

.usecase-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  text-align: center;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.usecase-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

.usecase-card:nth-child(1)::before { background: var(--color-accent); }
.usecase-card:nth-child(2)::before { background: var(--color-purple); }
.usecase-card:nth-child(3)::before { background: var(--color-red); }
.usecase-card:nth-child(4)::before { background: linear-gradient(90deg, var(--color-accent), var(--color-purple)); }

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

.usecase-icon {
  width: 64px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  margin: 0 auto 20px;
  font-size: 1.5rem;
}

.usecase-card:nth-child(1) .usecase-icon {
  background: rgba(233, 30, 99, 0.1);
  color: var(--color-accent);
}

.usecase-card:nth-child(2) .usecase-icon {
  background: rgba(147, 51, 234, 0.1);
  color: var(--color-purple);
}

.usecase-card:nth-child(3) .usecase-icon {
  background: rgba(255, 59, 92, 0.1);
  color: var(--color-red);
}

.usecase-card:nth-child(4) .usecase-icon {
  background: rgba(233, 30, 99, 0.1);
  color: var(--color-accent);
}

.usecase-card h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 10px;
}

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

/* ==================== Pricing Section ==================== */
.pricing {
  background: var(--color-bg-secondary);
}

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

.pricing-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: 40px 32px;
  position: relative;
  transition: all var(--transition-normal);
}

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

.pricing-card.popular {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-glow);
}

.pricing-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--gradient-accent);
  color: #fff;
  padding: 6px 24px;
  border-radius: 50px;
  font-size: 0.8rem;
  font-weight: 600;
  white-space: nowrap;
}

.pricing-card h3 {
  font-size: 1.3rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.pricing-card .price {
  font-size: 3rem;
  font-weight: 800;
  margin-bottom: 4px;
}

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

.pricing-card .price-desc {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  margin-bottom: 28px;
}

.pricing-features {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 32px;
}

.pricing-features li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.95rem;
  color: var(--color-text-secondary);
}

.pricing-features li i.fa-check {
  color: var(--color-accent);
  font-size: 0.85rem;
}

.pricing-features li i.fa-xmark {
  color: var(--color-text-muted);
  font-size: 0.85rem;
}

.pricing-features li.disabled {
  color: var(--color-text-muted);
}

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

/* ==================== Testimonials Section ==================== */
.testimonials-header {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-bottom: 48px;
}

.rating-overview {
  display: flex;
  align-items: center;
  gap: 24px;
  margin-top: 16px;
}

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

.rating-score .score {
  font-size: 3.5rem;
  font-weight: 800;
  line-height: 1;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.rating-score .stars {
  color: #FFB800;
  font-size: 1.1rem;
  margin: 8px 0 4px;
}

.rating-score .count {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

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

.rating-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.rating-bar .bar {
  width: 120px;
  height: 6px;
  background: var(--color-border);
  border-radius: 3px;
  overflow: hidden;
}

.rating-bar .bar-fill {
  height: 100%;
  background: var(--gradient-accent);
  border-radius: 3px;
}

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

.testimonial-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: all var(--transition-normal);
}

.testimonial-card:hover {
  border-color: var(--color-border-hover);
  transform: translateY(-2px);
}

.testimonial-stars {
  color: #FFB800;
  margin-bottom: 14px;
  font-size: 0.9rem;
}

.testimonial-card blockquote {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: 18px;
  font-style: italic;
}

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

.testimonial-avatar {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: var(--gradient-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.9rem;
  color: #fff;
}

.testimonial-info .name {
  font-weight: 600;
  font-size: 0.9rem;
}

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

.testimonial-tags {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin-top: 40px;
}

.testimonial-tag {
  padding: 6px 16px;
  border: 1px solid var(--color-border);
  border-radius: 50px;
  font-size: 0.85rem;
  color: var(--color-text-secondary);
}

/* ==================== Comparison Section ==================== */
.comparison {
  background: var(--color-bg-secondary);
}

.comparison-table-wrapper {
  overflow-x: auto;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
}

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

.comparison-table thead {
  background: var(--color-bg-card);
}

.comparison-table th {
  padding: 18px 24px;
  text-align: left;
  font-weight: 600;
  font-size: 0.95rem;
  border-bottom: 1px solid var(--color-border);
}

.comparison-table th.highlight {
  color: var(--color-accent);
  background: rgba(233, 30, 99, 0.05);
}

.comparison-table td {
  padding: 16px 24px;
  border-bottom: 1px solid var(--color-border);
  font-size: 0.95rem;
  color: var(--color-text-secondary);
}

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

.comparison-table td.highlight {
  background: rgba(233, 30, 99, 0.03);
  color: var(--color-text);
  font-weight: 500;
}

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

.comparison-table td .fa-xmark {
  color: var(--color-text-muted);
}

.comparison-table tbody tr {
  transition: background var(--transition-fast);
}

.comparison-table tbody tr:hover {
  background: rgba(255, 255, 255, 0.02);
}

/* ==================== FAQ Section ==================== */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all var(--transition-normal);
}

.faq-item:hover {
  border-color: var(--color-border-hover);
}

.faq-item.active {
  border-color: rgba(233, 30, 99, 0.3);
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 20px 24px;
  text-align: left;
  font-size: 1rem;
  font-weight: 500;
  color: var(--color-text);
  cursor: pointer;
  gap: 16px;
}

.faq-question i {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  transition: transform var(--transition-normal);
  flex-shrink: 0;
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-slow), padding var(--transition-slow);
}

.faq-answer-content {
  padding: 0 24px 20px;
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  line-height: 1.8;
}

/* ==================== Final CTA Section ==================== */
.final-cta {
  position: relative;
  text-align: center;
  padding: 100px 24px;
  background: linear-gradient(135deg, rgba(233, 30, 99, 0.12) 0%, rgba(147, 51, 234, 0.12) 50%, rgba(255, 59, 92, 0.08) 100%);
  overflow: hidden;
}

.final-cta::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(ellipse at center, rgba(233, 30, 99, 0.08), transparent 70%);
  pointer-events: none;
}

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

.final-cta h2 {
  font-size: 3rem;
  font-weight: 800;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.final-cta p {
  font-size: 1.15rem;
  color: var(--color-text-secondary);
  margin-bottom: 36px;
}

/* ==================== Footer ==================== */
.footer {
  background: var(--color-bg-secondary);
  border-top: 1px solid var(--color-border);
  padding: 60px 0 30px;
}

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

.footer-brand .footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 14px;
}

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

.footer-brand p {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  line-height: 1.7;
  max-width: 300px;
}

.footer-links h4 {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 16px;
}

.footer-links ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links a {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  transition: color var(--transition-fast);
}

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

.footer-bottom {
  padding-top: 24px;
  border-top: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  flex-wrap: wrap;
  gap: 12px;
}

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

.footer-legal a {
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
}

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

/* ==================== Back to Top ==================== */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: var(--gradient-accent);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all var(--transition-normal);
  z-index: 900;
  cursor: pointer;
  box-shadow: var(--shadow-md);
}

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

.back-to-top:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 25px rgba(233, 30, 99, 0.4);
}

/* ==================== Animations ==================== */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

.fade-in-delay-1 { transition-delay: 0.1s; }
.fade-in-delay-2 { transition-delay: 0.2s; }
.fade-in-delay-3 { transition-delay: 0.3s; }
.fade-in-delay-4 { transition-delay: 0.4s; }

/* ==================== 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:last-child {
    grid-column: span 2;
    max-width: 400px;
    margin: 0 auto;
  }

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

  .testimonials-slider .testimonial-card:last-child {
    grid-column: span 2;
    max-width: 500px;
    margin: 0 auto;
  }

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

@media (max-width: 768px) {
  .section {
    padding: 70px 0;
  }

  .section-title {
    font-size: 2rem;
  }

  .nav {
    display: none;
  }

  .mobile-toggle {
    display: flex;
  }

  .hero h1 {
    font-size: 2.5rem;
  }

  .hero p {
    font-size: 1.05rem;
  }

  .hero-stats {
    gap: 24px;
  }

  .hero-stat .number {
    font-size: 1.5rem;
  }

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

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

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

  .pricing-card:last-child {
    grid-column: span 1;
    max-width: none;
  }

  .testimonials-slider {
    grid-template-columns: 1fr;
  }

  .testimonials-slider .testimonial-card:last-child {
    grid-column: span 1;
    max-width: none;
  }

  .rating-overview {
    flex-direction: column;
    gap: 16px;
  }

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

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

  .final-cta h2 {
    font-size: 2rem;
  }

  .comparison-table-wrapper {
    margin: 0 -24px;
    border-radius: 0;
    border-left: none;
    border-right: none;
  }
}

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

  .hero-buttons {
    flex-direction: column;
    width: 100%;
  }

  .hero-buttons .btn {
    width: 100%;
    justify-content: center;
  }

  .hero-stats {
    flex-direction: row;
    gap: 20px;
  }

  .hero-stat .number {
    font-size: 1.3rem;
  }

  .hero-stat .label {
    font-size: 0.75rem;
  }

  .btn-lg {
    padding: 16px 32px;
    font-size: 1rem;
  }
}