/* ========== CSS Variables ========== */
:root {
  --color-primary: #121011;
  --color-secondary: #121111;
  --color-accent: #c98abf;
  --color-accent2: #6c3ee6;
  --color-gray: #848486;
  --color-white: #ffffff;
  --color-light-bg: #f8f7fa;
  --color-card-bg: #1a1819;
  --color-border: rgba(201, 138, 191, 0.15);
  --gradient-main: linear-gradient(135deg, #6c3ee6 0%, #c98abf 100%);
  --gradient-hero: linear-gradient(160deg, #121011 0%, #1e1a2e 50%, #121011 100%);
  --gradient-cta: linear-gradient(135deg, #6c3ee6 0%, #c98abf 50%, #6c3ee6 100%);
  --shadow-card: 0 8px 32px rgba(108, 62, 230, 0.1);
  --shadow-card-hover: 0 16px 48px rgba(108, 62, 230, 0.2);
  --shadow-btn: 0 4px 20px rgba(108, 62, 230, 0.35);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --font-primary: 'Inter', 'Noto Sans SC', 'Noto Sans JP', 'Noto Sans KR', sans-serif;
  --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

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

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

ul, ol {
  list-style: none;
}

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

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

section {
  padding: 100px 0;
}

.section-title {
  text-align: center;
  font-size: 2.25rem;
  font-weight: 700;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

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

/* ========== Animations ========== */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s 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; }
.fade-in-delay-5 { transition-delay: 0.5s; }
.fade-in-delay-6 { transition-delay: 0.6s; }

/* ========== Header / Navbar ========== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  padding: 16px 0;
  transition: all var(--transition-base);
  background: transparent;
}

.navbar.scrolled {
  background: rgba(18, 16, 17, 0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  padding: 10px 0;
  box-shadow: 0 4px 30px 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: 1.35rem;
  font-weight: 700;
}

.nav-brand img {
  width: 36px;
  height: 36px;
  border-radius: 8px;
}

.nav-brand span {
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-links a {
  font-size: 0.92rem;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.75);
  display: flex;
  align-items: center;
  gap: 6px;
  transition: color var(--transition-base);
}

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

.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 {
  display: flex;
  align-items: center;
  gap: 6px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: rgba(255, 255, 255, 0.8);
  padding: 7px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  cursor: pointer;
  transition: all var(--transition-base);
  font-family: var(--font-primary);
}

.lang-switcher-btn:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: var(--color-accent);
}

.lang-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  background: rgba(26, 24, 25, 0.98);
  backdrop-filter: blur(20px);
  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(-8px);
  transition: all var(--transition-base);
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.4);
}

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

.lang-dropdown a {
  display: block;
  padding: 8px 14px;
  font-size: 0.88rem;
  color: rgba(255, 255, 255, 0.7);
  border-radius: 6px;
  transition: all var(--transition-base);
}

.lang-dropdown a:hover,
.lang-dropdown a.active {
  background: rgba(108, 62, 230, 0.15);
  color: var(--color-accent);
}

/* CTA Button */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 24px;
  background: var(--gradient-cta);
  background-size: 200% 200%;
  color: var(--color-white);
  font-weight: 600;
  font-size: 0.92rem;
  border-radius: 50px;
  border: none;
  cursor: pointer;
  transition: all var(--transition-base);
  box-shadow: var(--shadow-btn);
  font-family: var(--font-primary);
}

.btn-primary:hover {
  background-position: 100% 0;
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(108, 62, 230, 0.5);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 24px;
  background: transparent;
  color: var(--color-accent);
  font-weight: 600;
  font-size: 0.92rem;
  border-radius: 50px;
  border: 2px solid var(--color-accent);
  cursor: pointer;
  transition: all var(--transition-base);
  font-family: var(--font-primary);
}

.btn-secondary:hover {
  background: rgba(201, 138, 191, 0.1);
  transform: translateY(-2px);
}

/* Mobile Menu Toggle */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 5px;
  z-index: 1001;
}

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

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

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

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

/* ========== Hero Section ========== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  background: var(--gradient-hero);
  position: relative;
  overflow: hidden;
  padding: 140px 0 100px;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle at 30% 40%, rgba(108, 62, 230, 0.08) 0%, transparent 50%),
              radial-gradient(circle at 70% 60%, rgba(201, 138, 191, 0.06) 0%, transparent 50%);
  animation: heroGlow 15s ease-in-out infinite alternate;
}

@keyframes heroGlow {
  0% { transform: translate(0, 0) scale(1); }
  100% { transform: translate(-5%, 3%) scale(1.05); }
}

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

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(108, 62, 230, 0.15);
  border: 1px solid rgba(108, 62, 230, 0.3);
  padding: 6px 18px;
  border-radius: 50px;
  font-size: 0.85rem;
  color: var(--color-accent);
  margin-bottom: 28px;
}

.hero h1 {
  font-size: 3.5rem;
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 20px;
  letter-spacing: -0.03em;
}

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

.hero p {
  font-size: 1.2rem;
  color: var(--color-gray);
  max-width: 560px;
  margin: 0 auto 36px;
  line-height: 1.7;
}

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

.hero-buttons .btn-primary {
  padding: 14px 36px;
  font-size: 1.05rem;
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: 48px;
  margin-top: 56px;
  padding-top: 40px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

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

.hero-stat .number {
  font-size: 1.8rem;
  font-weight: 700;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

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

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

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

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

.feature-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-card-hover);
  border-color: rgba(108, 62, 230, 0.3);
}

.feature-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  background: rgba(108, 62, 230, 0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  font-size: 1.4rem;
  color: var(--color-accent2);
}

.feature-card h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 10px;
}

.feature-card p {
  color: var(--color-gray);
  font-size: 0.92rem;
  line-height: 1.65;
}

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

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

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

.use-case-card {
  background: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 36px 24px;
  text-align: center;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.use-case-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  border-radius: 3px 3px 0 0;
}

.use-case-card:nth-child(1)::before { background: var(--color-accent2); }
.use-case-card:nth-child(2)::before { background: var(--color-accent); }
.use-case-card:nth-child(3)::before { background: linear-gradient(90deg, #6c3ee6, #c98abf); }
.use-case-card:nth-child(4)::before { background: var(--color-gray); }

.use-case-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-card-hover);
}

.use-case-icon {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: rgba(108, 62, 230, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  font-size: 1.5rem;
  color: var(--color-accent2);
}

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

.use-case-card p {
  color: var(--color-gray);
  font-size: 0.88rem;
  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-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  position: relative;
  transition: all var(--transition-base);
}

.pricing-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-card-hover);
}

.pricing-card.popular {
  border-color: var(--color-accent2);
  box-shadow: 0 0 40px rgba(108, 62, 230, 0.15);
}

.pricing-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--gradient-main);
  color: var(--color-white);
  padding: 4px 20px;
  border-radius: 50px;
  font-size: 0.8rem;
  font-weight: 600;
  white-space: nowrap;
}

.pricing-card h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.pricing-price {
  font-size: 2.8rem;
  font-weight: 800;
  margin-bottom: 4px;
}

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

.pricing-desc {
  color: var(--color-gray);
  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: 0.92rem;
  color: rgba(255, 255, 255, 0.8);
}

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

.pricing-features li i.fa-check {
  color: #4ade80;
}

.pricing-features li i.fa-xmark {
  color: rgba(255, 255, 255, 0.25);
}

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

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

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

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

.testimonial-stat .big-number {
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--color-accent);
}

.testimonial-stat .stat-label {
  font-size: 0.88rem;
  color: var(--color-gray);
  margin-top: 4px;
}

.stars {
  color: #fbbf24;
  font-size: 1.1rem;
  letter-spacing: 2px;
}

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

.testimonial-card {
  background: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  transition: all var(--transition-base);
}

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

.testimonial-stars {
  color: #fbbf24;
  margin-bottom: 16px;
  font-size: 0.9rem;
}

.testimonial-card blockquote {
  color: rgba(255, 255, 255, 0.85);
  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: 42px;
  height: 42px;
  border-radius: 50%;
  background: var(--gradient-main);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--color-white);
}

.testimonial-name {
  font-weight: 600;
  font-size: 0.92rem;
}

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

.testimonial-tags {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-top: 40px;
  flex-wrap: wrap;
}

.testimonial-tag {
  background: rgba(108, 62, 230, 0.1);
  border: 1px solid rgba(108, 62, 230, 0.2);
  padding: 6px 18px;
  border-radius: 50px;
  font-size: 0.82rem;
  color: var(--color-accent);
}

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

.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: 640px;
}

.comparison-table th,
.comparison-table td {
  padding: 18px 24px;
  text-align: center;
  font-size: 0.92rem;
  border-bottom: 1px solid var(--color-border);
}

.comparison-table thead th {
  background: var(--color-card-bg);
  font-weight: 700;
  font-size: 1rem;
  color: var(--color-white);
}

.comparison-table thead th.highlight-col {
  background: rgba(108, 62, 230, 0.15);
  color: var(--color-accent);
}

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

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

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

.comparison-table tbody td.highlight-col {
  background: rgba(108, 62, 230, 0.06);
}

.comparison-table .check {
  color: #4ade80;
  font-size: 1.1rem;
}

.comparison-table .cross {
  color: rgba(255, 255, 255, 0.2);
  font-size: 1.1rem;
}

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

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

.faq-list {
  max-width: 780px;
  margin: 0 auto;
}

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

.faq-item:hover {
  border-color: rgba(108, 62, 230, 0.3);
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 20px 24px;
  background: var(--color-card-bg);
  border: none;
  color: var(--color-white);
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  text-align: left;
  font-family: var(--font-primary);
  transition: all var(--transition-base);
}

.faq-question:hover {
  background: rgba(108, 62, 230, 0.08);
}

.faq-question i {
  font-size: 0.85rem;
  color: var(--color-accent);
  transition: transform var(--transition-base);
  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-content {
  padding: 0 24px 20px;
  color: var(--color-gray);
  font-size: 0.92rem;
  line-height: 1.75;
  background: var(--color-card-bg);
}

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

.final-cta::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle at 50% 50%, rgba(255,255,255,0.08) 0%, transparent 70%);
}

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

.final-cta h2 {
  font-size: 2.8rem;
  font-weight: 800;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.final-cta p {
  font-size: 1.15rem;
  opacity: 0.9;
  margin-bottom: 36px;
}

.final-cta .btn-cta-big {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 16px 44px;
  background: var(--color-white);
  color: var(--color-accent2);
  font-weight: 700;
  font-size: 1.1rem;
  border-radius: 50px;
  border: none;
  cursor: pointer;
  transition: all var(--transition-base);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.2);
  font-family: var(--font-primary);
}

.final-cta .btn-cta-big:hover {
  transform: translateY(-3px) scale(1.03);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}

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

.footer-content {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}

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

.footer-brand img {
  width: 32px;
  height: 32px;
  border-radius: 8px;
}

.footer-brand span {
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.footer-desc {
  color: var(--color-gray);
  font-size: 0.88rem;
  line-height: 1.7;
  max-width: 320px;
}

.footer h4 {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 20px;
  color: var(--color-white);
}

.footer-links a {
  display: block;
  color: var(--color-gray);
  font-size: 0.88rem;
  padding: 5px 0;
  transition: color var(--transition-base);
}

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

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

.footer-bottom p {
  color: var(--color-gray);
  font-size: 0.82rem;
}

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

.footer-bottom-links a {
  color: var(--color-gray);
  font-size: 0.82rem;
  transition: color var(--transition-base);
}

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

/* ========== Back to Top ========== */
.back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: var(--gradient-main);
  color: var(--color-white);
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all var(--transition-base);
  box-shadow: var(--shadow-btn);
  z-index: 999;
}

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

.back-to-top:hover {
  transform: translateY(-3px);
}

/* ========== Mobile Nav Overlay ========== */
.mobile-nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100vh;
  background: rgba(18, 16, 17, 0.98);
  backdrop-filter: blur(20px);
  z-index: 999;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 24px;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
}

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

.mobile-nav a {
  font-size: 1.3rem;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.8);
  display: flex;
  align-items: center;
  gap: 10px;
  transition: color var(--transition-base);
}

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

.mobile-nav .lang-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
  margin-top: 24px;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.mobile-nav .lang-links a {
  font-size: 0.92rem;
  padding: 6px 14px;
  background: rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-sm);
}

/* ========== 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);
  }

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

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

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

  section {
    padding: 72px 0;
  }

  .nav-links {
    display: none;
  }

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

  .menu-toggle {
    display: flex;
  }

  .hero {
    padding: 120px 0 80px;
    min-height: auto;
  }

  .hero h1 {
    font-size: 2.4rem;
  }

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

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

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

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

  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 420px;
    margin-left: auto;
    margin-right: auto;
  }

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

  .footer-content {
    grid-template-columns: 1fr;
    gap: 32px;
  }

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

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

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

  .testimonials-header {
    gap: 24px;
  }
}

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

  .hero h1 {
    font-size: 2rem;
  }

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

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