html {
  scroll-behavior: smooth;
}

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

:root {
  /* Blue colors */
  --blue-600: #2563eb;
  --blue-500: #3b82f6;
  --blue-400: #60a5fa;

  /* Red colors */
  --red-600: #dc2626;
  --red-500: #ef4444;
  --red-900: #7f1d1d;

  /* Green colors */
  --green-500: #22c55e;
  --green-400: #4ade80;
  --green-600: #16a34a;

  /* Primary colors (using blue as primary) */
  --primary-color: #2563eb;
  --primary-dark: #1d4ed8;
  --primary-light: #60a5fa;
  --secondary-color: #3b82f6;

  /* Text colors */
  --text-primary: #1f2937;
  --text-secondary: #6b7280;

  /* Background colors */
  --bg-light: #f9fafb;
  --bg-white: #ffffff;
  --border-color: #e5e7eb;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

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

/* Skip to main content link for accessibility */
.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--blue-600);
  color: white;
  padding: 0.75rem 1.5rem;
  text-decoration: none;
  z-index: 10000;
  border-radius: 0 0 0.5rem 0;
  font-weight: 600;
}

.skip-link:focus {
  top: 0;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* Header Navigation */
.header {
  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;
  padding: 1rem 0;
}

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

.nav-brand {
  font-size: 1.5rem;
  font-weight: 700;
  display: flex;
  align-items: center;
}

.brand-link {
  color: var(--text-primary);
  text-decoration: none;
  transition: transform 0.3s ease, opacity 0.3s ease;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.brand-link:hover {
  transform: scale(1.05);
  opacity: 0.9;
}

.logo-icon {
  height: 40px;
  width: 40px;
  display: block;
  flex-shrink: 0;
}

.brand-text {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 2rem;
  align-items: center;
  margin-left: auto;
}

.nav-link {
  color: var(--text-primary);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.3s ease;
  position: relative;
}

.nav-link:hover {
  color: var(--blue-600);
}

.nav-link::after {
  content: "";
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--blue-600);
  transition: width 0.3s ease;
}

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

.btn-nav {
  padding: 0.75rem 1.5rem;
  font-size: 0.9375rem;
}

/* Mobile menu toggle button */
.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  z-index: 1001;
}

.mobile-menu-toggle span {
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  transition: all 0.3s ease;
  border-radius: 2px;
}

.mobile-menu-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: rotate(45deg) translate(6px, 6px);
}

.mobile-menu-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.mobile-menu-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: rotate(-45deg) translate(6px, -6px);
}

/* Hero Section */
.hero {
  min-height: calc(100vh - 80px);
  background: linear-gradient(135deg, var(--blue-600) 0%, var(--blue-500) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  padding: 2rem 0;
  margin-top: 80px;
}

.hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><defs><pattern id="grid" width="100" height="100" patternUnits="userSpaceOnUse"><path d="M 100 0 L 0 0 0 100" fill="none" stroke="rgba(255,255,255,0.05)" stroke-width="1"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
  opacity: 0.3;
}

.hero .container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
  position: relative;
  z-index: 1;
  width: 100%;
}

.hero-content {
  color: white;
}

.hero-title {
  font-size: 4.5rem;
  font-weight: 800;
  margin-bottom: 1rem;
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.hero-subtitle {
  font-size: 1.5rem;
  font-weight: 500;
  margin-bottom: 1.5rem;
  opacity: 0.95;
}

.hero-description {
  font-size: 1.125rem;
  margin-bottom: 2.5rem;
  opacity: 0.9;
  line-height: 1.7;
}

.cta-buttons {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 1rem 2rem;
  border-radius: 0.5rem;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.3s ease;
  border: none;
  cursor: pointer;
  font-size: 1rem;
}

.btn-primary {
  background: var(--blue-600);
  color: white;
}

.btn-primary:hover {
  background: var(--blue-500);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-primary:focus,
.btn-secondary:focus,
.nav-link:focus,
.footer-link:focus {
  outline: 2px solid var(--blue-600);
  outline-offset: 2px;
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.2);
  color: white;
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.3);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.3);
  transform: translateY(-2px);
}

.btn-block {
  display: block;
  width: 100%;
  text-align: center;
}

.btn-large {
  padding: 1.25rem 3rem;
  font-size: 1.125rem;
}

/* Tablet Showcase */
.tablet-showcase {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  perspective: 1000px;
}

.tablet-frame {
  position: relative;
  width: 400px;
  height: 600px;
  background: #1a1a1a;
  border-radius: 2rem;
  padding: 1.5rem;
  box-shadow: 0 0 0 8px #2a2a2a, 0 0 0 12px #1a1a1a, 0 30px 60px rgba(0, 0, 0, 0.5), inset 0 0 0 2px rgba(255, 255, 255, 0.1);
  transform: rotateY(-5deg) rotateX(2deg);
  transition: transform 0.3s ease;
}

.tablet-frame:hover {
  transform: rotateY(0deg) rotateX(0deg);
}

.tablet-screen {
  width: 100%;
  height: 100%;
  background: #000;
  border-radius: 1.5rem;
  overflow: hidden;
  position: relative;
}

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

.tablet-shadow {
  position: absolute;
  bottom: -20px;
  left: 50%;
  transform: translateX(-50%);
  width: 80%;
  height: 40px;
  background: rgba(0, 0, 0, 0.3);
  border-radius: 50%;
  filter: blur(20px);
}

.wall-mount {
  position: absolute;
  top: -30px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 30px;
  background: linear-gradient(to bottom, #4a5568, #2d3748);
  border-radius: 8px 8px 0 0;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
}

.wall-mount::before {
  content: "";
  position: absolute;
  top: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 8px;
  height: 8px;
  background: #1a1a1a;
  border-radius: 50%;
  box-shadow: 0 0 0 2px #4a5568;
}

/* Section Styles */
section {
  padding: 6rem 0;
}

.section-title {
  font-size: 2.5rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 3rem;
  color: var(--text-primary);
}

/* Advantage Section */
.advantage {
  background: var(--bg-light);
}

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

.advantage-card {
  background: white;
  padding: 2.5rem;
  border-radius: 1rem;
  text-align: center;
  box-shadow: var(--shadow-md);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

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

.advantage-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
  display: flex;
  justify-content: center;
  align-items: center;
}

.icon-svg {
  width: 64px;
  height: 64px;
  display: block;
}

.advantage-card h3 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.advantage-card p {
  color: var(--text-secondary);
  line-height: 1.7;
}

/* Principle Section */
.principle {
  background: white;
}

.principle-content {
  max-width: 800px;
  margin: 0 auto;
}

.principle-text {
  font-size: 1.125rem;
  line-height: 1.8;
  color: var(--text-secondary);
}

.principle-text .lead {
  font-size: 1.25rem;
  color: var(--text-primary);
  margin-bottom: 2rem;
}

.quote-large {
  font-size: 1.75rem;
  font-weight: 600;
  color: var(--green-500);
  text-align: center;
  margin: 2.5rem 0;
  padding: 2rem;
  background: var(--bg-light);
  border-left: 4px solid var(--green-500);
  border-radius: 0.5rem;
  font-style: italic;
}

/* Stoic Wisdom */
.stoic-wisdom {
  background: linear-gradient(135deg, var(--blue-600) 0%, var(--blue-500) 100%);
  color: white;
}

.stoic-wisdom .section-title {
  color: white;
}

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

.wisdom-card {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  padding: 2.5rem;
  border-radius: 1rem;
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.wisdom-quote {
  font-size: 1.125rem;
  line-height: 1.8;
  margin-bottom: 1.5rem;
  font-style: italic;
}

.wisdom-author {
  font-size: 0.875rem;
  opacity: 0.9;
  text-align: right;
}

/* How It Works */
.how-it-works {
  background: var(--bg-light);
}

.steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 3rem;
  max-width: 1000px;
  margin: 0 auto;
}

.step {
  text-align: center;
}

.step-number {
  width: 60px;
  height: 60px;
  background: var(--blue-600);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: 700;
  margin: 0 auto 1.5rem;
}

.step h3 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.step p {
  color: var(--text-secondary);
  line-height: 1.7;
}

/* Testimonials */
.testimonials {
  background: white;
}

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2.5rem;
}

.testimonial-card {
  background: var(--bg-light);
  padding: 2.5rem;
  border-radius: 1rem;
  text-align: center;
  box-shadow: var(--shadow-md);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

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

.testimonial-image {
  width: 120px;
  height: 120px;
  margin: 0 auto 1.5rem;
  border-radius: 50%;
  overflow: hidden;
  border: 4px solid var(--blue-500);
}

.testimonial-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.testimonial-stars {
  color: var(--green-500);
  font-size: 1.25rem;
  margin-bottom: 1.5rem;
  letter-spacing: 2px;
}

.testimonial-text {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  font-style: italic;
}

.testimonial-author {
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.25rem;
}

.testimonial-role {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

/* Pricing */
.pricing {
  background: var(--bg-light);
}

.pricing-subtitle {
  text-align: center;
  font-size: 1.125rem;
  color: var(--text-secondary);
  margin-bottom: 3rem;
}

.pricing-grid {
  display: flex;
  justify-content: center;
  max-width: 500px;
  margin: 0 auto 2rem;
}

.pricing-card {
  background: white;
  padding: 3rem 2.5rem;
  border-radius: 1rem;
  box-shadow: var(--shadow-lg);
  text-align: center;
  position: relative;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  width: 100%;
}

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

.pricing-badge {
  position: absolute;
  top: -15px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--green-500);
  color: white;
  padding: 0.5rem 1.5rem;
  border-radius: 2rem;
  font-size: 0.875rem;
  font-weight: 600;
}

.pricing-card h3 {
  font-size: 1.5rem;
  margin-bottom: 1.5rem;
  color: var(--text-primary);
}

.pricing-amount {
  display: flex;
  align-items: baseline;
  justify-content: center;
  margin-bottom: 0.5rem;
}

.currency {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.price {
  font-size: 3.5rem;
  font-weight: 800;
  color: var(--text-primary);
  margin: 0 0.25rem;
}

.period {
  font-size: 1.125rem;
  color: var(--text-secondary);
}

.pricing-note {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-bottom: 0.75rem;
}

.pricing-alternative {
  font-size: 0.875rem;
  color: var(--text-secondary);
  font-style: italic;
  margin-bottom: 2rem;
}

.pricing-features {
  list-style: none;
  text-align: left;
  margin-bottom: 2.5rem;
}

.pricing-features li {
  padding: 0.75rem 0;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border-color);
}

.pricing-features li:last-child {
  border-bottom: none;
}

.pricing-cta {
  text-align: center;
  margin: 3rem 0 2rem;
}

.pricing-guarantee {
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.875rem;
}

/* Final CTA */
.final-cta {
  background: linear-gradient(135deg, var(--blue-600) 0%, var(--blue-500) 100%);
  color: white;
  text-align: center;
  padding: 6rem 0;
}

.final-cta h2 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
  color: white;
}

.final-cta p {
  font-size: 1.25rem;
  margin-bottom: 2.5rem;
  opacity: 0.95;
}

/* Footer */
.footer {
  background: #1f2937;
  color: white;
  padding: 3rem 0 2rem;
}

.footer-nav {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 2rem;
  margin-bottom: 2rem;
}

.footer-link {
  color: white;
  text-decoration: none;
  opacity: 0.8;
  transition: opacity 0.3s ease;
  font-size: 0.9375rem;
}

.footer-link:hover {
  opacity: 1;
  color: var(--blue-400);
}

.footer-copyright {
  text-align: center;
  opacity: 0.6;
  font-size: 0.875rem;
  margin-top: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* Responsive */
@media (max-width: 968px) {
  .nav-links {
    gap: 1.5rem;
  }

  .nav-link {
    font-size: 0.875rem;
  }

  .btn-nav {
    padding: 0.625rem 1.25rem;
    font-size: 0.875rem;
  }

  .hero .container {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero-title {
    font-size: 3rem;
  }

  .tablet-frame {
    width: 300px;
    height: 450px;
  }

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

@media (max-width: 640px) {
  .nav {
    flex-wrap: wrap;
    position: relative;
  }

  .mobile-menu-toggle {
    display: flex;
    order: 2;
  }

  .logo-icon {
    height: 32px;
    width: 32px;
  }

  .brand-text {
    font-size: 1.25rem;
  }

  .nav-links {
    display: none;
    order: 3;
    width: 100%;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: white;
    box-shadow: var(--shadow-lg);
    padding: 1rem 2rem;
    margin-top: 1rem;
    gap: 0;
    border-radius: 0.5rem;
  }

  .nav-links[aria-expanded="true"],
  .nav-links.mobile-open {
    display: flex;
  }

  .nav-links li {
    width: 100%;
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border-color);
  }

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

  .nav-link {
    display: block;
    width: 100%;
    padding: 0.5rem 0;
  }

  .hero {
    margin-top: 120px;
    min-height: calc(100vh - 120px);
    padding: 1.5rem 0;
  }

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

  .hero-subtitle {
    font-size: 1.25rem;
  }

  .tablet-frame {
    width: 250px;
    height: 375px;
  }

  .cta-buttons {
    flex-direction: column;
  }

  .btn {
    width: 100%;
  }

  .footer-nav {
    flex-direction: column;
    gap: 1rem;
  }
}