:root {
  --color-primary: #0d0a0b;
  --color-secondary: #1a1514;
  --color-accent: #f25ca3;
  --color-gray: #7b7c7b;
  --color-gray-light: #75747c;
  --color-white: #ffffff;
  --color-bg-dark: #0d0a0b;
  --color-bg-card: #1a1514;
  --color-bg-card-hover: #231e1c;
  --color-text: #e8e6e3;
  --color-text-muted: #a09c99;
  --color-accent-glow: rgba(242, 92, 163, 0.3);
  --color-accent-soft: rgba(242, 92, 163, 0.1);
  --font-heading: 'Inter', 'Noto Sans SC', sans-serif;
  --font-body: 'Inter', 'Noto Sans SC', sans-serif;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.3);
  --shadow-glow: 0 0 30px rgba(242, 92, 163, 0.15);
  --transition: 0.3s ease;
}

*,
*::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-dark);
  color: var(--color-text);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

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

a:hover {
  color: #ff7ab8;
}

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

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.section-title {
  text-align: center;
  font-size: 2.25rem;
  margin-bottom: 1rem;
  color: var(--color-white);
}

.section-subtitle {
  text-align: center;
  color: var(--color-text-muted);
  font-size: 1.1rem;
  margin-bottom: 3rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: linear-gradient(135deg, var(--color-accent), #d94590);
  color: var(--color-white);
  padding: 14px 32px;
  border-radius: 50px;
  font-size: 1rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
  box-shadow: 0 4px 20px var(--color-accent-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 30px rgba(242, 92, 163, 0.5);
  color: var(--color-white);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: transparent;
  color: var(--color-accent);
  padding: 14px 32px;
  border-radius: 50px;
  font-size: 1rem;
  font-weight: 600;
  border: 2px solid var(--color-accent);
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
}

.btn-secondary:hover {
  background: var(--color-accent-soft);
  transform: translateY(-2px);
  color: var(--color-accent);
}

/* 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);
}

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

.header.scrolled {
  background: rgba(13, 10, 11, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  padding: 10px 0;
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
}

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

.header-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--color-white);
  font-weight: 700;
  font-size: 1.25rem;
}

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

.nav-menu {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
}

.nav-menu a {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  font-weight: 500;
  transition: color var(--transition);
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav-menu a:hover {
  color: var(--color-white);
}

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

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

.nav-cta {
  padding: 10px 24px;
  font-size: 0.9rem;
}

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

.lang-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: var(--color-text-muted);
  padding: 8px 14px;
  border-radius: 8px;
  font-size: 0.85rem;
  cursor: pointer;
  transition: all var(--transition);
}

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

.lang-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  background: var(--color-secondary);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-md);
  padding: 8px;
  min-width: 160px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all var(--transition);
  box-shadow: var(--shadow-card);
  z-index: 100;
}

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

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

.lang-dropdown a:hover,
.lang-dropdown a.current {
  background: var(--color-accent-soft);
  color: var(--color-accent);
}

/* Mobile Menu */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-white);
  transition: all var(--transition);
  border-radius: 2px;
}

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

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

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

.mobile-nav {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(13, 10, 11, 0.98);
  z-index: 999;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 24px;
}

.mobile-nav.active {
  display: flex;
}

.mobile-nav a {
  color: var(--color-white);
  font-size: 1.5rem;
  font-weight: 600;
}

.mobile-nav .lang-mobile {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
  margin-top: 20px;
}

.mobile-nav .lang-mobile a {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  padding: 8px 16px;
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 8px;
}

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

/* ============ HERO ============ */
.hero {
  padding: 140px 0 80px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, var(--color-accent-glow) 0%, transparent 70%);
  pointer-events: none;
}

.hero h1 {
  font-size: 3.5rem;
  color: var(--color-white);
  margin-bottom: 1rem;
  position: relative;
}

.hero h1 span {
  background: linear-gradient(135deg, var(--color-accent), #ff7ab8);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--color-text-muted);
  max-width: 650px;
  margin: 0 auto 2.5rem;
  position: relative;
}

.hero-cta {
  position: relative;
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--color-accent-soft);
  color: var(--color-accent);
  padding: 8px 20px;
  border-radius: 50px;
  font-size: 0.9rem;
  font-weight: 500;
  margin-bottom: 1.5rem;
  position: relative;
}

/* ============ FEATURES ============ */
.features {
  padding: 100px 0;
}

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

.feature-card {
  background: var(--color-bg-card);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: all var(--transition);
}

.feature-card:hover {
  background: var(--color-bg-card-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
  border-color: rgba(242, 92, 163, 0.2);
}

.feature-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-accent-soft);
  border-radius: var(--radius-sm);
  margin-bottom: 20px;
  font-size: 1.25rem;
  color: var(--color-accent);
}

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

.feature-card p {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  line-height: 1.6;
}

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

/* ============ USE CASES ============ */
.use-cases {
  padding: 100px 0;
  background: var(--color-secondary);
}

.use-cases-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.use-case-card {
  background: var(--color-bg-dark);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  text-align: center;
  transition: all var(--transition);
}

.use-case-card:hover {
  transform: translateY(-4px);
  border-color: rgba(242, 92, 163, 0.2);
}

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

.use-case-card:nth-child(1) .use-case-icon {
  background: rgba(242, 92, 163, 0.15);
  color: var(--color-accent);
}

.use-case-card:nth-child(2) .use-case-icon {
  background: rgba(99, 102, 241, 0.15);
  color: #818cf8;
}

.use-case-card:nth-child(3) .use-case-icon {
  background: rgba(52, 211, 153, 0.15);
  color: #6ee7b7;
}

.use-case-card:nth-child(4) .use-case-icon {
  background: rgba(251, 191, 36, 0.15);
  color: #fbbf24;
}

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

.use-case-card p {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  line-height: 1.5;
}

/* ============ PRICING ============ */
.pricing {
  padding: 100px 0;
}

.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 rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  transition: all var(--transition);
  position: relative;
}

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

.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: linear-gradient(135deg, var(--color-accent), #d94590);
  color: var(--color-white);
  padding: 6px 20px;
  border-radius: 50px;
  font-size: 0.8rem;
  font-weight: 600;
  white-space: nowrap;
}

.pricing-card h3 {
  font-size: 1.25rem;
  color: var(--color-white);
  margin-bottom: 8px;
}

.pricing-card .price {
  font-size: 2.75rem;
  font-weight: 800;
  color: var(--color-white);
  margin-bottom: 4px;
}

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

.pricing-features {
  list-style: none;
  margin-bottom: 32px;
}

.pricing-features li {
  padding: 8px 0;
  color: var(--color-text-muted);
  font-size: 0.95rem;
  display: flex;
  align-items: center;
  gap: 10px;
}

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

.pricing-features li i.fa-xmark {
  color: var(--color-gray);
}

.pricing-features li.disabled {
  opacity: 0.5;
}

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

/* ============ TESTIMONIALS ============ */
.testimonials {
  padding: 100px 0;
  background: var(--color-secondary);
}

.testimonials-stats {
  display: flex;
  justify-content: center;
  gap: 48px;
  margin-bottom: 3rem;
  flex-wrap: wrap;
}

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

.stat-value {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--color-white);
}

.stat-value .accent {
  color: var(--color-accent);
}

.stat-label {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  margin-top: 4px;
}

.stars {
  color: #fbbf24;
  font-size: 1.1rem;
  margin-bottom: 4px;
}

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

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

.testimonial-card {
  min-width: 100%;
  padding: 0 12px;
}

.testimonial-card-inner {
  background: var(--color-bg-dark);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-lg);
  padding: 32px;
  display: flex;
  gap: 20px;
}

.testimonial-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--color-accent-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent);
  font-weight: 700;
  font-size: 1.1rem;
  flex-shrink: 0;
}

.testimonial-content .stars {
  margin-bottom: 12px;
}

.testimonial-text {
  color: var(--color-text);
  font-size: 1rem;
  line-height: 1.7;
  margin-bottom: 12px;
}

.testimonial-author {
  color: var(--color-text-muted);
  font-size: 0.85rem;
}

.testimonial-author strong {
  color: var(--color-white);
}

.carousel-controls {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-top: 24px;
}

.carousel-btn {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-bg-dark);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  color: var(--color-text-muted);
  cursor: pointer;
  transition: all var(--transition);
  font-size: 0.9rem;
}

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

.carousel-dots {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 20px;
}

.carousel-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-gray);
  cursor: pointer;
  transition: all var(--transition);
}

.carousel-dot.active {
  background: var(--color-accent);
  width: 24px;
  border-radius: 4px;
}

.testimonial-tags {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin-top: 2rem;
}

.testimonial-tag {
  background: var(--color-accent-soft);
  color: var(--color-accent);
  padding: 6px 16px;
  border-radius: 50px;
  font-size: 0.85rem;
  font-weight: 500;
}

/* ============ COMPARISON ============ */
.comparison {
  padding: 100px 0;
}

.comparison-table-wrapper {
  overflow-x: auto;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--color-bg-card);
}

.comparison-table th,
.comparison-table td {
  padding: 16px 24px;
  text-align: center;
  font-size: 0.95rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.comparison-table th {
  background: var(--color-secondary);
  color: var(--color-white);
  font-weight: 600;
  font-size: 1rem;
}

.comparison-table th.highlight,
.comparison-table td.highlight {
  background: rgba(242, 92, 163, 0.08);
  color: var(--color-accent);
}

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

.comparison-table td i.fa-check {
  color: var(--color-accent);
  font-size: 1.1rem;
}

.comparison-table td i.fa-xmark {
  color: var(--color-gray);
  font-size: 1.1rem;
}

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

.comparison-table td:first-child {
  text-align: left;
  color: var(--color-text);
  font-weight: 500;
}

/* ============ FAQ ============ */
.faq {
  padding: 100px 0;
  background: var(--color-secondary);
}

.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

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

.faq-item:hover {
  border-color: rgba(242, 92, 163, 0.15);
}

.faq-item.active {
  border-color: rgba(242, 92, 163, 0.3);
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  cursor: pointer;
  color: var(--color-white);
  font-weight: 600;
  font-size: 1rem;
  background: none;
  border: none;
  width: 100%;
  text-align: left;
  gap: 16px;
}

.faq-question i {
  color: var(--color-accent);
  transition: transform var(--transition);
  flex-shrink: 0;
}

.faq-item.active .faq-question i {
  transform: rotate(45deg);
}

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

.faq-answer-inner {
  padding: 0 24px 20px;
  color: var(--color-text-muted);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* ============ FINAL CTA ============ */
.final-cta {
  padding: 100px 0;
  background: linear-gradient(135deg, rgba(242, 92, 163, 0.15) 0%, rgba(13, 10, 11, 1) 50%, rgba(242, 92, 163, 0.1) 100%);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.final-cta::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 400px;
  background: radial-gradient(ellipse, var(--color-accent-glow) 0%, transparent 60%);
  pointer-events: none;
}

.final-cta h2 {
  font-size: 2.75rem;
  color: var(--color-white);
  margin-bottom: 1rem;
  position: relative;
}

.final-cta p {
  font-size: 1.2rem;
  color: var(--color-text-muted);
  margin-bottom: 2.5rem;
  position: relative;
}

.final-cta .btn-primary {
  font-size: 1.15rem;
  padding: 18px 48px;
  position: relative;
}

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

.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;
}

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

.footer-brand span {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--color-white);
}

.footer-about p {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  line-height: 1.6;
}

.footer-col h4 {
  color: var(--color-white);
  font-size: 0.95rem;
  margin-bottom: 16px;
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 10px;
}

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

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

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding-top: 24px;
  text-align: center;
  color: var(--color-text-muted);
  font-size: 0.85rem;
}

/* ============ BACK TO TOP ============ */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-accent);
  color: var(--color-white);
  border-radius: 50%;
  border: none;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition);
  box-shadow: 0 4px 20px var(--color-accent-glow);
  z-index: 900;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 30px rgba(242, 92, 163, 0.5);
}

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

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

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

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

@media (max-width: 768px) {
  .nav-menu,
  .nav-right .nav-cta,
  .lang-switcher {
    display: none;
  }

  .hamburger {
    display: flex;
  }

  .hero h1 {
    font-size: 2.25rem;
  }

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

  .section-title {
    font-size: 1.75rem;
  }

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

  .use-cases-grid {
    grid-template-columns: 1fr;
  }

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

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

  .testimonial-card-inner {
    flex-direction: column;
  }

  .comparison-table th,
  .comparison-table td {
    padding: 12px 14px;
    font-size: 0.85rem;
  }

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

  .testimonials-stats {
    gap: 24px;
  }

  .stat-value {
    font-size: 2rem;
  }
}

@media (max-width: 480px) {
  .hero {
    padding: 120px 0 60px;
  }

  .hero h1 {
    font-size: 1.75rem;
  }

  .container {
    padding: 0 16px;
  }

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