/* STARPHONE LLC - Main CSS */
/* Modern, clean, responsive design with gradient accents */

/* CSS Variables */
:root {
  --primary-gradient: linear-gradient(135deg, #0056FF 0%, #00C6FF 100%);
  --secondary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --accent-blue: #0056FF;
  --accent-cyan: #00C6FF;
  --text-primary: #1a1a1a;
  --text-secondary: #666666;
  --text-light: #999999;
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-dark: #1a1a1a;
  --border-light: #e2e8f0;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.15);
  --shadow-glow: 0 0 20px rgba(0, 86, 255, 0.3);
  --border-radius: 12px;
  --border-radius-lg: 20px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Reset and Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  overflow-x: hidden;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1rem;
}

h1 {
  font-size: clamp(2.5rem, 5vw, 4rem);
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  color: var(--text-primary);
}

h3 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  color: var(--text-primary);
}

p {
  margin-bottom: 1rem;
  color: var(--text-secondary);
  font-size: 1.1rem;
}

/* Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1rem;
}

/* Header - Nextiva Style */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(249, 250, 251, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid transparent;
  z-index: 1000;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

.header.scrolled {
  background: rgba(255, 255, 255, 0.98);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
  border-bottom: 1px solid #e5e7eb;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 80px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 12px;
  margin-top: 1rem;
  margin-bottom: 1rem;
}

.logo {
  font-size: 28px;
  font-weight: 700;
  color: #1e40af;
  text-decoration: none;
  letter-spacing: -0.02em;
  transition: all 0.2s ease;
  position: relative;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.logo::before {
  content: '';
  width: 8px;
  height: 8px;
  background: #fbbf24;
  border-radius: 50%;
  position: absolute;
  top: 50%;
  left: -1.2rem;
  transform: translateY(-50%);
}

.logo:hover {
  color: var(--accent-blue);
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: 40px;
  align-items: center;
  margin: 0;
  padding: 0;
}

.nav-item {
  position: relative;
}

.nav-link {
  text-decoration: none;
  color: #6b7280;
  font-weight: 500;
  font-size: 16px;
  padding: 12px 0;
  transition: all 0.2s ease;
  position: relative;
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav-link:hover {
  color: #1e40af;
}

.nav-link::after {
  content: '';
  width: 0;
  height: 2px;
  background: var(--accent-blue);
  position: absolute;
  bottom: 8px;
  left: 0;
  transition: width 0.3s ease;
}

.nav-link:hover::after {
  width: 100%;
}

/* Dropdown Arrow */
.nav-item.has-dropdown .nav-link::after {
  content: '▼';
  position: static;
  width: auto;
  height: auto;
  background: none;
  font-size: 10px;
  margin-left: 4px;
  transition: transform 0.2s ease;
}

.nav-item.has-dropdown:hover .nav-link::after {
  transform: rotate(180deg);
}

/* Dropdown Menu */
.dropdown {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  background: white;
  border-radius: 12px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  padding: 24px 0;
  min-width: 320px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  border: 1px solid #e5e7eb;
}

.nav-item:hover .dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown-section {
  margin-bottom: 16px;
}

.dropdown-section:last-child {
  margin-bottom: 0;
}

.dropdown-title {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: 0 24px 8px;
  margin-bottom: 8px;
}

.dropdown-item {
  display: block;
  padding: 12px 24px;
  color: var(--text-primary);
  text-decoration: none;
  font-size: 15px;
  font-weight: 500;
  transition: all 0.2s ease;
  position: relative;
}

.dropdown-item:hover {
  background: #f8fafc;
  color: var(--accent-blue);
}

.dropdown-item::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--accent-blue);
  transform: scaleY(0);
  transition: transform 0.2s ease;
}

.dropdown-item:hover::before {
  transform: scaleY(1);
}

/* Navigation Buttons */
.nav-buttons {
  display: flex;
  align-items: center;
  gap: 16px;
}

.btn-login {
  background: white;
  border: 1px solid #e5e7eb;
  color: #6b7280;
  padding: 12px 24px;
  border-radius: 6px;
  text-decoration: none;
  font-weight: 500;
  font-size: 15px;
  transition: all 0.2s ease;
  position: relative;
  overflow: hidden;
}

.btn-login:hover {
  background: #f9fafb;
  border-color: #1e40af;
  color: #1e40af;
}

.btn-start-free {
  background: #1e40af;
  color: white;
  padding: 12px 24px;
  border-radius: 6px;
  text-decoration: none;
  font-weight: 500;
  font-size: 15px;
  transition: all 0.2s ease;
  box-shadow: 0 2px 4px rgba(30, 64, 175, 0.2);
  position: relative;
  overflow: hidden;
  border: 1px solid #1e40af;
}

.btn-start-free::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: left 0.5s ease;
}

.btn-start-free:hover {
  background: #1d4ed8;
  border-color: #1d4ed8;
  transform: translateY(-1px);
  box-shadow: 0 4px 8px rgba(30, 64, 175, 0.3);
}

.btn-start-free:hover::before {
  left: 100%;
}

/* Mobile Menu */
.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  font-size: 24px;
  color: var(--text-primary);
  cursor: pointer;
  padding: 8px;
  border-radius: 6px;
  transition: background 0.2s ease;
}

.mobile-menu-btn:hover {
  background: #f8fafc;
}

.mobile-menu {
  position: fixed;
  top: 0;
  right: -100%;
  width: 100%;
  max-width: 400px;
  height: 100vh;
  background: white;
  box-shadow: -4px 0 20px rgba(0, 0, 0, 0.15);
  transition: right 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 1001;
  overflow-y: auto;
}

.mobile-menu.active {
  right: 0;
}

.mobile-menu-header {
  padding: 24px;
  border-bottom: 1px solid #e5e7eb;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: #f8fafc;
}

.mobile-menu-close {
  background: none;
  border: none;
  font-size: 24px;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 8px;
  border-radius: 6px;
  transition: background 0.2s ease;
}

.mobile-menu-close:hover {
  background: #e5e7eb;
}

.mobile-menu-content {
  padding: 24px;
}

.mobile-nav-item {
  margin-bottom: 8px;
}

.mobile-nav-link {
  display: block;
  padding: 16px 0;
  color: var(--text-primary);
  text-decoration: none;
  font-weight: 600;
  font-size: 16px;
  border-bottom: 1px solid #f3f4f6;
  transition: color 0.2s ease;
}

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

.mobile-dropdown {
  padding-left: 16px;
  margin-top: 8px;
}

.mobile-dropdown-item {
  display: block;
  padding: 12px 0;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  transition: color 0.2s ease;
}

.mobile-dropdown-item:hover {
  color: var(--accent-blue);
}

.mobile-buttons {
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid #e5e7eb;
}

.mobile-btn {
  display: block;
  width: 100%;
  padding: 16px 24px;
  margin-bottom: 12px;
  text-align: center;
  text-decoration: none;
  border-radius: 8px;
  font-weight: 600;
  font-size: 15px;
  transition: all 0.2s ease;
}

.mobile-btn-login {
  background: transparent;
  border: 2px solid #d1d5db;
  color: var(--text-primary);
}

.mobile-btn-login:hover {
  background: #f8fafc;
  border-color: var(--accent-blue);
  color: var(--accent-blue);
}

.mobile-btn-start-free {
  background: linear-gradient(135deg, #10b981 0%, var(--accent-blue) 100%);
  color: white;
  box-shadow: 0 4px 14px rgba(0, 102, 204, 0.3);
}

.mobile-btn-start-free:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(0, 102, 204, 0.4);
}

/* Overlay */
.overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
  z-index: 1000;
}

.overlay.active {
  opacity: 1;
  visibility: visible;
}

/* Language Switcher */
.lang-switcher {
  position: relative;
  display: inline-block;
  margin-left: 1rem;
}

.lang-btn {
  background: rgba(0, 86, 255, 0.1);
  border: 1px solid rgba(0, 86, 255, 0.2);
  border-radius: 8px;
  padding: 0.5rem 1rem;
  cursor: pointer;
  transition: all 0.2s ease;
  font-weight: 500;
  font-size: 0.9rem;
  color: var(--accent-blue);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.lang-btn:hover {
  background: rgba(0, 86, 255, 0.15);
  border-color: var(--accent-blue);
  transform: translateY(-1px);
  box-shadow: 0 2px 8px rgba(0, 86, 255, 0.2);
}

.lang-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  background: var(--bg-primary);
  border: 1px solid rgba(0, 0, 0, 0.08);
  border-radius: 12px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.12);
  min-width: 140px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  backdrop-filter: blur(20px);
  z-index: 1000;
}

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

.lang-option {
  display: block;
  padding: 0.75rem 1rem;
  text-decoration: none;
  color: var(--text-primary);
  transition: all 0.2s ease;
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
  font-size: 0.9rem;
  font-weight: 500;
}

.lang-option:last-child {
  border-bottom: none;
  border-radius: 0 0 12px 12px;
}

.lang-option:first-child {
  border-radius: 12px 12px 0 0;
}

.lang-option:hover {
  background: rgba(0, 86, 255, 0.08);
  color: var(--accent-blue);
  transform: translateX(4px);
}


/* Mobile Menu - Nextiva Style */
.mobile-menu-btn {
  display: none;
  background: rgba(0, 86, 255, 0.1);
  border: 1px solid rgba(0, 86, 255, 0.2);
  border-radius: 8px;
  padding: 0.5rem;
  font-size: 1.2rem;
  cursor: pointer;
  color: var(--accent-blue);
  transition: all 0.2s ease;
}

.mobile-menu-btn:hover {
  background: rgba(0, 86, 255, 0.15);
  border-color: var(--accent-blue);
  transform: translateY(-1px);
  box-shadow: 0 2px 8px rgba(0, 86, 255, 0.2);
}

/* Hero Section */
.hero {
  padding: 8rem 0 4rem;
  background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="%23e2e8f0" stroke-width="0.5"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
  opacity: 0.3;
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
}

.hero-title {
  margin-bottom: 1.5rem;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.cta-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 3rem;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 1rem 2rem;
  border: none;
  border-radius: var(--border-radius);
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: var(--transition);
  font-size: 1rem;
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: var(--primary-gradient);
  color: white;
  box-shadow: var(--shadow-md);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.btn-secondary {
  background: var(--bg-primary);
  color: var(--text-primary);
  border: 2px solid var(--border-light);
}

.btn-secondary:hover {
  border-color: var(--accent-blue);
  color: var(--accent-blue);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

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

.btn-outline:hover {
  background: var(--accent-blue);
  color: white;
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

/* Sections */
.section {
  padding: 4rem 0;
}

.section-header {
  text-align: center;
  margin-bottom: 3rem;
}

.section-title {
  margin-bottom: 1rem;
}

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

/* Features Grid */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

.feature-card {
  background: var(--bg-primary);
  padding: 2rem;
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-light);
  transition: var(--transition);
  text-align: center;
}

.feature-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-color: var(--accent-blue);
}

.feature-icon {
  width: 60px;
  height: 60px;
  margin: 0 auto 1.5rem;
  background: var(--primary-gradient);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: white;
}

.feature-title {
  font-size: 1.25rem;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.feature-description {
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Pricing Cards */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

.pricing-card {
  background: var(--bg-primary);
  border: 2px solid var(--border-light);
  border-radius: var(--border-radius-lg);
  padding: 2rem;
  text-align: center;
  transition: var(--transition);
  position: relative;
}

.pricing-card.featured {
  border-color: var(--accent-blue);
  transform: scale(1.05);
  box-shadow: var(--shadow-lg);
}

.pricing-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.pricing-badge {
  position: absolute;
  top: -10px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--primary-gradient);
  color: white;
  padding: 0.5rem 1rem;
  border-radius: var(--border-radius);
  font-size: 0.875rem;
  font-weight: 600;
}

.pricing-title {
  font-size: 1.5rem;
  margin-bottom: 1rem;
}

.pricing-price {
  font-size: 3rem;
  font-weight: 800;
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 0.5rem;
}

.pricing-period {
  color: var(--text-secondary);
  margin-bottom: 2rem;
}

.pricing-features {
  list-style: none;
  margin-bottom: 2rem;
}

.pricing-features li {
  padding: 0.5rem 0;
  color: var(--text-secondary);
  position: relative;
  padding-left: 1.5rem;
}

.pricing-features li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--accent-blue);
  font-weight: bold;
}

/* Testimonials */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

.testimonial-card {
  background: var(--bg-primary);
  padding: 2rem;
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-light);
  transition: var(--transition);
}

.testimonial-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.testimonial-text {
  font-style: italic;
  margin-bottom: 1.5rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.author-avatar {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: var(--primary-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: bold;
  font-size: 1.2rem;
}

.author-info h4 {
  margin: 0;
  font-size: 1rem;
  color: var(--text-primary);
}

.author-info p {
  margin: 0;
  font-size: 0.875rem;
  color: var(--text-secondary);
}

/* Footer */
/* Footer - Original Design */
.footer {
  background: var(--bg-dark);
  color: white;
  padding: 3rem 0 1rem;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
  margin-bottom: 2rem;
}

.footer-section h3 {
  color: white;
  margin-bottom: 1rem;
  font-size: 1.1rem;
}

.footer-section p,
.footer-section a {
  color: #ccc;
  text-decoration: none;
  transition: var(--transition);
  line-height: 1.6;
}

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

.footer-bottom {
  border-top: 1px solid #333;
  padding-top: 1rem;
  text-align: center;
  color: #999;
}

/* FAQ */
.faq-item {
  background: var(--bg-primary);
  border: 1px solid var(--border-light);
  border-radius: var(--border-radius);
  margin-bottom: 1rem;
  overflow: hidden;
}

.faq-question {
  width: 100%;
  padding: 1.5rem;
  background: none;
  border: none;
  text-align: left;
  font-size: 1.1rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.faq-question:hover {
  background: var(--bg-secondary);
}

.faq-answer {
  padding: 0 1.5rem;
  max-height: 0;
  overflow: hidden;
  transition: var(--transition);
  color: var(--text-secondary);
  line-height: 1.6;
}

.faq-answer.active {
  padding: 0 1.5rem 1.5rem;
  max-height: 200px;
}

.faq-icon {
  transition: var(--transition);
}

.faq-icon.rotated {
  transform: rotate(180deg);
}

/* Forms */
.form-group {
  margin-bottom: 1.5rem;
}

.form-label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 600;
  color: var(--text-primary);
}

.form-input,
.form-textarea {
  width: 100%;
  padding: 1rem;
  border: 2px solid var(--border-light);
  border-radius: var(--border-radius);
  font-size: 1rem;
  transition: var(--transition);
  background: var(--bg-primary);
}

.form-input:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--accent-blue);
  box-shadow: 0 0 0 3px rgba(0, 86, 255, 0.1);
}

.form-textarea {
  min-height: 120px;
  resize: vertical;
}

/* Utility Classes */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }

.hidden { display: none; }
.visible { display: block; }

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

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

.animate-fadeInUp {
  animation: fadeInUp 0.6s ease-out;
}

.animate-fadeIn {
  animation: fadeIn 0.6s ease-out;
}

/* Responsive Design - Nextiva Style */
@media (max-width: 768px) {
  .nav {
    padding: 0.5rem 1rem;
  }

  .nav-menu {
    position: fixed;
    top: 100%;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 2rem 1rem;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.12);
    border-top: 1px solid rgba(0, 0, 0, 0.08);
    transform: translateY(-100%);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    gap: 0;
  }

  .nav-menu.active {
    transform: translateY(0);
  }

  .nav-link {
    padding: 1rem 0;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    width: 100%;
    text-align: center;
    font-size: 1rem;
    font-weight: 600;
  }

  .nav-link:last-child {
    border-bottom: none;
  }

  .nav-link:hover {
    background: rgba(0, 86, 255, 0.08);
    border-radius: 8px;
    transform: none;
  }

  .mobile-menu-btn {
    display: block;
  }

  .lang-switcher {
    margin-left: 0;
    margin-top: 1rem;
    align-self: center;
  }

  .hero {
    padding: 6rem 0 3rem;
  }

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

  .btn {
    width: 100%;
    max-width: 300px;
    justify-content: center;
  }

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

  .pricing-card.featured {
    transform: none;
  }

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

/* Responsive Navigation */
@media (max-width: 1024px) {
  .nav-menu {
    gap: 24px;
  }
}

@media (max-width: 900px) {
  .nav-menu {
    display: none;
  }

  .nav-buttons {
    display: none;
  }

  .mobile-menu-btn {
    display: block;
  }

  .nav {
    padding: 0 16px;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 0.5rem;
  }

  .hero {
    padding: 5rem 0 2rem;
  }

  .section {
    padding: 2rem 0;
  }

  .feature-card,
  .pricing-card,
  .testimonial-card {
    padding: 1.5rem;
  }
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
  :root {
    --text-primary: #ffffff;
    --text-secondary: #cccccc;
    --text-light: #999999;
    --bg-primary: #1a1a1a;
    --bg-secondary: #2a2a2a;
    --border-light: #333333;
  }

  .header {
    background: rgba(26, 26, 26, 0.95);
  }

  .hero {
    background: linear-gradient(135deg, #2a2a2a 0%, #1a1a1a 100%);
  }
}