/* =============================================
   Erogen AI — Shared Stylesheet
   ============================================= */

/* --- CSS Variables --- */
:root {
  --color-primary: #121010;
  --color-secondary: #141212;
  --color-accent: #b688e2;
  --color-gray: #848484;
  --color-accent-dark: #743fa8;
  --color-text: #e8e8e8;
  --color-text-muted: #a0a0a0;
  --color-bg: #0c0a0a;
  --color-card: #1a1717;
  --color-card-hover: #201d1d;
  --color-border: #2a2727;
  --gradient-accent: linear-gradient(135deg, #743fa8, #b688e2);
  --gradient-accent-reverse: linear-gradient(135deg, #b688e2, #743fa8);
  --gradient-hero: radial-gradient(ellipse at 50% 0%, rgba(116, 63, 168, 0.15) 0%, transparent 60%);
  --gradient-cta: linear-gradient(135deg, #1a1018, #121010, #1a1018);
  --border-radius: 16px;
  --border-radius-sm: 10px;
  --border-radius-xs: 6px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
  --shadow-accent: 0 4px 30px rgba(182, 136, 226, 0.12);
  --shadow-hover: 0 8px 40px rgba(182, 136, 226, 0.18);
  --max-width: 1200px;
  --nav-height: 72px;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-height);
  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;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

a:hover {
  color: #d4b4f0;
}

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

ul, ol {
  list-style: none;
}

h1, h2, h3, h4, h5, h6 {
  line-height: 1.3;
  font-weight: 700;
}

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

.section {
  padding: 100px 0;
}

.section-title {
  font-size: 2.25rem;
  text-align: center;
  margin-bottom: 16px;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-subtitle {
  text-align: center;
  color: var(--color-text-muted);
  font-size: 1.1rem;
  max-width: 600px;
  margin: 0 auto 56px;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: 50px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: var(--transition);
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary {
  background: var(--gradient-accent);
  color: #fff;
  box-shadow: 0 4px 20px rgba(116, 63, 168, 0.35);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 30px rgba(182, 136, 226, 0.45);
  color: #fff;
}

.btn-secondary {
  background: transparent;
  color: var(--color-accent);
  border: 1.5px solid var(--color-accent);
}

.btn-secondary:hover {
  background: rgba(182, 136, 226, 0.1);
  transform: translateY(-2px);
  color: var(--color-accent);
}

.btn-large {
  padding: 18px 44px;
  font-size: 1.15rem;
}

/* --- Navigation --- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  padding: 0 24px;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  transition: var(--transition);
  background: transparent;
}

.navbar.scrolled {
  background: rgba(12, 10, 10, 0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(182, 136, 226, 0.08);
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
}

.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

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

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

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

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

.nav-link {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: 8px;
  color: var(--color-text-muted);
  font-size: 0.95rem;
  font-weight: 500;
  transition: var(--transition);
}

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

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

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

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

.lang-toggle {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border-radius: 8px;
  color: var(--color-text-muted);
  font-size: 0.9rem;
  cursor: pointer;
  transition: var(--transition);
  background: none;
  border: 1px solid var(--color-border);
}

.lang-toggle:hover {
  color: var(--color-text);
  border-color: var(--color-accent);
}

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

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

.lang-dropdown a {
  display: block;
  padding: 8px 20px;
  color: var(--color-text-muted);
  font-size: 0.9rem;
  transition: var(--transition);
}

.lang-dropdown a:hover,
.lang-dropdown a.current {
  color: var(--color-accent);
  background: rgba(182, 136, 226, 0.08);
}

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

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

.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);
}

.nav-cta-mobile {
  display: none;
}

/* --- Hero Section --- */
.hero {
  position: relative;
  min-height: 560px;
  display: flex;
  align-items: center;
  padding-top: calc(var(--nav-height) + 40px);
  padding-bottom: 60px;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--gradient-hero);
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  top: -50%;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(116, 63, 168, 0.08) 0%, transparent 70%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 20px;
  border-radius: 50px;
  background: rgba(182, 136, 226, 0.1);
  border: 1px solid rgba(182, 136, 226, 0.2);
  color: var(--color-accent);
  font-size: 0.9rem;
  font-weight: 500;
  margin-bottom: 28px;
}

.hero h1 {
  font-size: 3.5rem;
  font-weight: 800;
  margin-bottom: 20px;
  line-height: 1.15;
}

.hero h1 .gradient-text {
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-description {
  font-size: 1.2rem;
  color: var(--color-text-muted);
  margin-bottom: 40px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

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

.hero-stats {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 48px;
  margin-top: 56px;
  padding-top: 40px;
  border-top: 1px solid var(--color-border);
}

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

.hero-stat-value {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--color-accent);
}

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

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

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

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

.feature-card:hover {
  border-color: rgba(182, 136, 226, 0.25);
  background: var(--color-card-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}

.feature-icon {
  width: 52px;
  height: 52px;
  border-radius: 12px;
  background: rgba(182, 136, 226, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  font-size: 1.25rem;
  color: var(--color-accent);
}

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

.feature-card p {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  line-height: 1.65;
}

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

/* --- Use Cases Section --- */
.use-cases {
  background: var(--color-bg);
}

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

.use-case-card {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  padding: 32px 24px;
  text-align: center;
  transition: var(--transition);
}

.use-case-card:hover {
  transform: translateY(-4px);
  border-color: rgba(182, 136, 226, 0.25);
  box-shadow: var(--shadow-hover);
}

.use-case-icon {
  width: 64px;
  height: 64px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  font-size: 1.5rem;
}

.use-case-card:nth-child(1) .use-case-icon {
  background: rgba(182, 136, 226, 0.12);
  color: var(--color-accent);
}

.use-case-card:nth-child(2) .use-case-icon {
  background: rgba(116, 63, 168, 0.15);
  color: var(--color-accent-dark);
}

.use-case-card:nth-child(3) .use-case-icon {
  background: rgba(182, 136, 226, 0.12);
  color: #c9a4ee;
}

.use-case-card:nth-child(4) .use-case-icon {
  background: rgba(116, 63, 168, 0.15);
  color: #9b6dd4;
}

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

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

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

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

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

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

.pricing-card.popular {
  border-color: var(--color-accent);
  background: linear-gradient(180deg, rgba(182, 136, 226, 0.06) 0%, var(--color-card) 100%);
}

.pricing-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--gradient-accent);
  color: #fff;
  padding: 6px 20px;
  border-radius: 50px;
  font-size: 0.8rem;
  font-weight: 600;
  white-space: nowrap;
}

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

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

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

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

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

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

.pricing-features li i {
  font-size: 0.85rem;
  width: 20px;
  text-align: center;
}

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

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

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

/* --- Testimonials Section --- */
.testimonials {
  background: var(--color-bg);
}

.testimonials-header {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 32px;
  margin-bottom: 48px;
  flex-wrap: wrap;
}

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

.testimonials-score .score-value {
  font-size: 3rem;
  font-weight: 800;
  color: var(--color-text);
}

.testimonials-score .stars {
  color: #f5a623;
  font-size: 1.1rem;
  margin: 4px 0;
}

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

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

.star-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.star-bar-label {
  width: 16px;
  text-align: right;
}

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

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

.star-bar-pct {
  width: 36px;
}

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

.testimonials-track {
  display: flex;
  gap: 24px;
  transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.testimonial-card {
  min-width: calc(33.333% - 16px);
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  padding: 32px;
  flex-shrink: 0;
}

.testimonial-card .stars {
  color: #f5a623;
  font-size: 0.9rem;
  margin-bottom: 16px;
}

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

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

.testimonial-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--gradient-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 700;
  font-size: 0.9rem;
}

.testimonial-author-info .name {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--color-text);
}

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

.testimonials-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin-top: 32px;
}

.testimonials-nav button {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid var(--color-border);
  background: var(--color-card);
  color: var(--color-text);
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
}

.testimonials-nav button:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.testimonials-dots {
  display: flex;
  gap: 8px;
}

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

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

.testimonials-tags {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin-top: 36px;
  flex-wrap: wrap;
}

.testimonials-tags .tag {
  padding: 6px 16px;
  border-radius: 50px;
  background: rgba(182, 136, 226, 0.08);
  border: 1px solid rgba(182, 136, 226, 0.15);
  color: var(--color-accent);
  font-size: 0.85rem;
  font-weight: 500;
}

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

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

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 640px;
}

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

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

.comparison-table thead th:first-child {
  text-align: left;
}

.comparison-table thead th.highlight {
  color: var(--color-accent);
  background: rgba(182, 136, 226, 0.06);
}

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

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

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

.comparison-table .highlight {
  background: rgba(182, 136, 226, 0.04);
}

.comparison-table .check {
  color: var(--color-accent);
  font-weight: 700;
}

.comparison-table .cross {
  color: #555;
}

/* --- FAQ Section --- */
.faq {
  background: var(--color-bg);
}

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

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

.faq-item.active {
  border-color: rgba(182, 136, 226, 0.25);
}

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

.faq-question:hover {
  color: var(--color-accent);
}

.faq-question i {
  font-size: 0.85rem;
  color: var(--color-accent);
  transition: transform 0.3s ease;
  flex-shrink: 0;
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease;
}

.faq-answer-inner {
  padding: 0 24px 20px;
  color: var(--color-text-muted);
  font-size: 0.95rem;
  line-height: 1.75;
}

/* --- Final CTA Section --- */
.final-cta {
  background: var(--gradient-cta);
  position: relative;
  overflow: hidden;
  padding: 100px 0;
}

.final-cta::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 50% 50%, rgba(116, 63, 168, 0.12) 0%, transparent 70%);
  pointer-events: none;
}

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

.final-cta h2 {
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: 16px;
}

.final-cta .subtitle {
  font-size: 1.15rem;
  color: var(--color-text-muted);
  margin-bottom: 40px;
}

/* --- Footer --- */
.footer {
  background: var(--color-secondary);
  border-top: 1px solid var(--color-border);
  padding: 48px 0 32px;
}

.footer-content {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 40px;
  flex-wrap: wrap;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--color-text);
  font-weight: 700;
  font-size: 1.15rem;
  margin-bottom: 12px;
}

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

.footer-desc {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  max-width: 300px;
  line-height: 1.65;
}

.footer-links {
  display: flex;
  gap: 48px;
}

.footer-links-col h4 {
  font-size: 0.95rem;
  margin-bottom: 16px;
  color: var(--color-text);
  font-weight: 600;
}

.footer-links-col a {
  display: block;
  padding: 4px 0;
  color: var(--color-text-muted);
  font-size: 0.9rem;
  transition: var(--transition);
}

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

.footer-bottom {
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-bottom p {
  color: var(--color-gray);
  font-size: 0.85rem;
}

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

.footer-bottom-links a {
  color: var(--color-gray);
  font-size: 0.85rem;
}

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

/* --- Back to Top --- */
.back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--gradient-accent);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  border: none;
  opacity: 0;
  visibility: hidden;
  transform: translateY(16px);
  transition: var(--transition);
  z-index: 999;
  box-shadow: 0 4px 16px rgba(116, 63, 168, 0.4);
}

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

.back-to-top:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 24px rgba(116, 63, 168, 0.5);
}

/* --- Scroll Reveal Animation --- */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

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

/* --- 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);
  }

  .pricing-card:last-child {
    grid-column: span 2;
    max-width: 400px;
    margin: 0 auto;
  }

  .testimonial-card {
    min-width: calc(50% - 12px);
  }
}

@media (max-width: 768px) {
  html {
    font-size: 15px;
  }

  .section {
    padding: 72px 0;
  }

  .section-title {
    font-size: 1.85rem;
  }

  .nav-menu {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background: rgba(12, 10, 10, 0.98);
    backdrop-filter: blur(20px);
    flex-direction: column;
    justify-content: center;
    gap: 8px;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 999;
  }

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

  .nav-menu .nav-link {
    font-size: 1.2rem;
    padding: 14px 24px;
  }

  .nav-cta-mobile {
    display: flex;
    margin-top: 24px;
  }

  .hamburger {
    display: flex;
    z-index: 1001;
  }

  .nav-actions .btn {
    display: none;
  }

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

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

  .hero-stats {
    gap: 24px;
    flex-wrap: wrap;
  }

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

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

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

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

  .testimonial-card {
    min-width: 100%;
  }

  .testimonials-header {
    flex-direction: column;
    gap: 20px;
  }

  .comparison-table th,
  .comparison-table td {
    padding: 12px 16px;
    font-size: 0.85rem;
  }

  .footer-content {
    flex-direction: column;
  }

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

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

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

  .hero-actions {
    flex-direction: column;
    align-items: center;
  }

  .lang-dropdown {
    right: auto;
    left: 0;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }

  .hero h1 {
    font-size: 1.85rem;
  }

  .section-title {
    font-size: 1.6rem;
  }

  .btn-large {
    padding: 16px 36px;
    font-size: 1.05rem;
  }
}