:root {
  --primary: #0066ff;
  --primary-dark: #0052cc;
  --primary-light: #3385ff;
  --secondary: #6c757d;
  --success: #28a745;
  --danger: #dc3545;
  --warning: #ffc107;
  --info: #17a2b8;
  --light: #f8f9fa;
  --dark: #212529;
  --gray-100: #f8f9fa;
  --gray-200: #e9ecef;
  --gray-300: #dee2e6;
  --gray-400: #ced4da;
  --gray-500: #adb5bd;
  --gray-600: #6c757d;
  --gray-700: #495057;
  --gray-800: #343a40;
  --gray-900: #212529;

  --gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --gradient-primary: linear-gradient(135deg, #0066ff 0%, #00ccff 100%);
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
  --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.15);
  --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.2);

  --border-radius: 12px;
  --border-radius-lg: 20px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    Oxygen, Ubuntu, Cantarell, sans-serif;
  color: var(--dark);
  line-height: 1.6;
  background: #ffffff;
  overflow-x: hidden;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Navigation */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-sm);
  z-index: 1000;
  transition: var(--transition);
}

.nav-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 0;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--dark);
  text-decoration: none;
}

.logo-icon {
  font-size: 2rem;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-links a {
  color: var(--gray-700);
  text-decoration: none;
  font-weight: 500;
  transition: var(--transition);
}

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

.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.mobile-menu-btn span {
  width: 25px;
  height: 3px;
  background: var(--dark);
  border-radius: 2px;
  transition: var(--transition);
}

/* Hero Section */
.hero {
  padding: 150px 0 100px;
  background: linear-gradient(180deg, #f8f9fa 0%, #ffffff 100%);
}

.hero-content {
  max-width: 600px;
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 1.5rem;
}

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

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--gray-600);
  margin-bottom: 2.5rem;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.hero-image {
  display: flex;
  justify-content: center;
  align-items: center;
  margin-top: 4rem;
}

/* App Window Preview */
.app-window {
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(20px);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-xl);
  padding: 1rem;
  max-width: 600px;
  width: 100%;
}

.window-controls {
  display: flex;
  gap: 8px;
  margin-bottom: 1rem;
}

.control {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.control.red {
  background: #ff5f57;
}
.control.yellow {
  background: #ffbd2e;
}
.control.green {
  background: #28c840;
}

.window-content {
  background: rgba(248, 249, 250, 0.5);
  border-radius: var(--border-radius);
  padding: 2rem;
}

.app-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.app-icon {
  width: 80px;
  height: 80px;
  background: white;
  border-radius: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
  box-shadow: var(--shadow);
  transition: var(--transition);
  animation: fadeInUp 0.6s ease-out backwards;
}

.app-icon:hover {
  transform: translateY(-5px) scale(1.05);
  box-shadow: var(--shadow-lg);
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border-radius: var(--border-radius);
  font-weight: 600;
  text-decoration: none;
  transition: var(--transition);
  border: none;
  cursor: pointer;
  font-size: 1rem;
}

.btn-primary {
  background: var(--primary);
  color: white !important;
}

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

.btn-secondary {
  background: var(--gray-200);
  color: var(--dark);
}

.btn-secondary:hover {
  background: var(--gray-300);
  transform: translateY(-2px);
}

.btn-large {
  padding: 1rem 2rem;
  font-size: 1.125rem;
}

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

.btn-icon {
  margin-left: 0.5rem;
}

/* Features Section */
.features {
  padding: 100px 0;
}

.section-header {
  text-align: center;
  margin-bottom: 4rem;
}

.section-title {
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: 1rem;
}

.section-subtitle {
  font-size: 1.25rem;
  color: var(--gray-600);
  max-width: 600px;
  margin: 0 auto;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.feature-card {
  padding: 2rem;
  background: white;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  transition: var(--transition);
}

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

.feature-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.feature-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
}

.feature-description {
  color: var(--gray-600);
  line-height: 1.7;
}

/* Screenshots Section */
.screenshots {
  padding: 100px 0;
  background: var(--gray-100);
}

.screenshot-showcase {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
  max-width: 1200px;
  margin: 0 auto;
}

.screenshot-card {
  border-radius: var(--border-radius);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  transition: var(--transition);
  background: white;
}

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

.screenshot-card img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
}

/* macOS Tahoe Support Section */
.tahoe-support {
  padding: 100px 0;
  background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
  position: relative;
  overflow: hidden;
}

.tahoe-support::before {
  content: '🏔️';
  position: absolute;
  font-size: 400px;
  opacity: 0.03;
  right: -100px;
  top: 50%;
  transform: translateY(-50%);
  pointer-events: none;
}

.tahoe-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.tahoe-badge {
  display: inline-block;
  background: linear-gradient(135deg, #0066ff 0%, #00ccff 100%);
  color: white;
  padding: 0.5rem 1rem;
  border-radius: 20px;
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
}

.tahoe-description {
  font-size: 1.125rem;
  color: var(--gray-600);
  margin-bottom: 2rem;
  line-height: 1.8;
}

.tahoe-features {
  list-style: none;
  margin-bottom: 2.5rem;
}

.tahoe-features li {
  display: flex;
  gap: 1rem;
  margin-bottom: 1.5rem;
  align-items: flex-start;
}

.tahoe-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  background: var(--primary);
  color: white;
  border-radius: 50%;
  font-weight: 700;
  font-size: 0.875rem;
  flex-shrink: 0;
}

.tahoe-features strong {
  display: block;
  font-size: 1.125rem;
  margin-bottom: 0.25rem;
  color: var(--dark);
}

.tahoe-features p {
  color: var(--gray-600);
  margin: 0;
  line-height: 1.6;
}

.tahoe-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.tahoe-visual {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2rem;
}

.tahoe-badge-large {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  background: white;
  padding: 2.5rem 3rem;
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-xl);
  transition: var(--transition);
}

.tahoe-badge-large:hover {
  transform: translateY(-5px);
  box-shadow: 0 25px 50px rgba(0, 0, 0, 0.25);
}

.badge-icon {
  font-size: 5rem;
}

.badge-text {
  display: flex;
  flex-direction: column;
}

.badge-title {
  font-size: 2rem;
  font-weight: 800;
  color: var(--dark);
  line-height: 1;
}

.badge-subtitle {
  font-size: 2.5rem;
  font-weight: 800;
  background: linear-gradient(135deg, #0066ff 0%, #00ccff 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.2;
}

/* Light & Dark Mode Section */
.mode-support {
  padding: 100px 0;
  background: white;
}

.mode-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.mode-visual {
  display: flex;
  justify-content: center;
}

.mode-preview {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  width: 100%;
  max-width: 500px;
}

.mode-card {
  padding: 2.5rem 2rem;
  border-radius: var(--border-radius-lg);
  text-align: center;
  box-shadow: var(--shadow-xl);
  transition: var(--transition);
}

.mode-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 25px 50px rgba(0, 0, 0, 0.3);
}

.mode-card.light-mode {
  background: linear-gradient(135deg, #ffffff 0%, #f8f9fa 100%);
  border: 2px solid var(--gray-200);
}

.mode-card.dark-mode {
  background: linear-gradient(135deg, #212529 0%, #343a40 100%);
  border: 2px solid var(--gray-700);
}

.mode-icon {
  font-size: 4rem;
  margin-bottom: 1rem;
}

.mode-name {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.mode-card.light-mode .mode-name {
  color: var(--dark);
}

.mode-card.dark-mode .mode-name {
  color: white;
}

.mode-desc {
  font-size: 1rem;
  margin: 0;
}

.mode-card.light-mode .mode-desc {
  color: var(--gray-600);
}

.mode-card.dark-mode .mode-desc {
  color: var(--gray-400);
}

.mode-description {
  font-size: 1.125rem;
  color: var(--gray-600);
  margin-bottom: 2rem;
  line-height: 1.8;
}

.mode-features {
  list-style: none;
  margin: 0;
  padding: 0;
}

.mode-features li {
  display: flex;
  gap: 1rem;
  margin-bottom: 1.5rem;
  align-items: flex-start;
}

.mode-feature-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  background: var(--primary);
  color: white;
  border-radius: 50%;
  font-weight: 700;
  font-size: 0.875rem;
  flex-shrink: 0;
}

.mode-features strong {
  display: block;
  font-size: 1.125rem;
  margin-bottom: 0.25rem;
  color: var(--dark);
}

.mode-features p {
  color: var(--gray-600);
  margin: 0;
  line-height: 1.6;
}

/* Pricing Section */
.pricing {
  padding: 100px 0;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  max-width: 1000px;
  margin: 0 auto;
}

.pricing-card {
  background: white;
  border-radius: var(--border-radius);
  padding: 2.5rem 2rem;
  box-shadow: var(--shadow);
  transition: var(--transition);
  position: relative;
}

.pricing-card.featured {
  border: 2px solid var(--primary);
  transform: scale(1.05);
}

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

.pricing-card.featured:hover {
  transform: translateY(-5px) scale(1.05);
}

.pricing-badge {
  display: inline-block;
  background: var(--primary);
  color: white;
  padding: 0.25rem 0.75rem;
  border-radius: 20px;
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 1rem;
}

.pricing-title {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 1rem;
}

.pricing-price {
  font-size: 3rem;
  font-weight: 800;
  color: var(--primary);
  margin-bottom: 0.5rem;
}

.pricing-description {
  color: var(--gray-600);
  margin-bottom: 2rem;
}

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

.pricing-features li {
  padding: 0.5rem 0;
  color: var(--gray-700);
}

/* Download Section */
.download {
  padding: 100px 0;
  background: linear-gradient(
    135deg,
    var(--primary) 0%,
    var(--primary-dark) 100%
  );
  color: white;
  text-align: center;
}

.download .section-title,
.download .section-subtitle {
  color: white;
}

.download-actions {
  margin: 2rem 0;
}

.download-info {
  color: rgba(255, 255, 255, 0.8);
  margin-top: 1rem;
}

/* Installation Help Section */
.installation-help {
  padding: 100px 0;
  background: white;
}

.help-header {
  text-align: center;
  margin-bottom: 4rem;
}

.help-content {
  max-width: 900px;
  margin: 0 auto;
}

.help-warning {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  background: linear-gradient(135deg, #fff3cd 0%, #ffe69c 100%);
  border-left: 4px solid #ffc107;
  padding: 1.5rem 2rem;
  border-radius: var(--border-radius);
  margin-bottom: 3rem;
}

.warning-icon {
  font-size: 2.5rem;
  flex-shrink: 0;
}

.warning-text strong {
  display: block;
  font-size: 1.125rem;
  color: var(--dark);
  margin-bottom: 0.25rem;
}

.warning-text p {
  color: var(--gray-700);
  margin: 0;
  font-style: italic;
}

.help-steps {
  display: grid;
  gap: 2rem;
  margin-bottom: 3rem;
}

.step-card {
  display: flex;
  gap: 1.5rem;
  background: var(--gray-100);
  padding: 2rem;
  border-radius: var(--border-radius);
  transition: var(--transition);
}

.step-card:hover {
  background: var(--gray-200);
  transform: translateX(5px);
}

.step-number {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 50px;
  height: 50px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  color: white;
  border-radius: 50%;
  font-size: 1.5rem;
  font-weight: 800;
  flex-shrink: 0;
}

.step-content {
  flex: 1;
}

.step-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 0.5rem;
}

.step-description {
  color: var(--gray-700);
  line-height: 1.7;
  margin: 0;
}

.step-description strong {
  color: var(--primary);
}

.help-alternative {
  background: var(--gray-100);
  padding: 2rem;
  border-radius: var(--border-radius);
  margin-bottom: 2rem;
}

.alternative-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 1rem;
}

.alternative-steps ol {
  margin: 0;
  padding-left: 1.5rem;
  color: var(--gray-700);
}

.alternative-steps li {
  margin-bottom: 0.75rem;
  line-height: 1.7;
}

.alternative-steps strong {
  color: var(--primary);
}

.help-note {
  display: flex;
  align-items: flex-start;
  gap: 1.5rem;
  background: linear-gradient(135deg, #e3f2fd 0%, #bbdefb 100%);
  border-left: 4px solid var(--info);
  padding: 1.5rem 2rem;
  border-radius: var(--border-radius);
}

.note-icon {
  font-size: 2rem;
  flex-shrink: 0;
}

.note-text strong {
  display: block;
  font-size: 1.125rem;
  color: var(--dark);
  margin-bottom: 0.5rem;
}

.note-text p {
  color: var(--gray-700);
  margin: 0;
  line-height: 1.7;
}

/* Footer */
.footer {
  background: var(--dark);
  color: white;
  padding: 60px 0 30px;
}

.footer-bottom {
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid var(--gray-700);
  color: var(--gray-400);
}

/* Responsive Design */
@media (max-width: 768px) {
  .mobile-menu-btn {
    display: flex;
  }

  .nav-links {
    display: none;
  }

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

  .hero-subtitle {
    font-size: 1.125rem;
  }

  .hero-actions {
    flex-direction: column;
  }

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

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

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

  .screenshot-showcase {
    grid-template-columns: 1fr;
  }

  .tahoe-content {
    grid-template-columns: 1fr;
    gap: 3rem;
  }

  .tahoe-badge-large {
    padding: 2rem;
  }

  .badge-icon {
    font-size: 3.5rem;
  }

  .badge-title {
    font-size: 1.5rem;
  }

  .badge-subtitle {
    font-size: 2rem;
  }

  .tahoe-actions {
    flex-direction: column;
  }

  .tahoe-actions .btn {
    width: 100%;
    justify-content: center;
  }

  .mode-content {
    grid-template-columns: 1fr;
    gap: 3rem;
  }

  .mode-preview {
    grid-template-columns: 1fr;
  }

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

  .help-warning {
    flex-direction: column;
    text-align: center;
  }

  .step-card {
    flex-direction: column;
    text-align: center;
  }

  .help-note {
    flex-direction: column;
    text-align: center;
  }

  .pricing-card.featured {
    transform: scale(1);
  }

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

/* Smooth scroll animations */
@media (prefers-reduced-motion: no-preference) {
  .feature-card,
  .screenshot-card,
  .pricing-card {
    animation: fadeIn 0.6s ease-out backwards;
  }

  .feature-card:nth-child(1) {
    animation-delay: 0.1s;
  }
  .feature-card:nth-child(2) {
    animation-delay: 0.2s;
  }
  .feature-card:nth-child(3) {
    animation-delay: 0.3s;
  }
  .feature-card:nth-child(4) {
    animation-delay: 0.4s;
  }
  .feature-card:nth-child(5) {
    animation-delay: 0.5s;
  }
  .feature-card:nth-child(6) {
    animation-delay: 0.6s;
  }
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}