/* CSS Custom Properties */
:root {
  --color-parchment: #F5ECD7;
  --color-light-bg: #EBE0C8;
  --color-teal: #2C6E6A;
  --color-coral: #E8734A;
  --color-dark: #1F2B2A;
  --color-white: #FFFFFF;

  --font-headline: 'Fraunces', serif;
  --font-body: 'DM Sans', sans-serif;

  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 4rem;
  --spacing-xl: 6rem;

  --radius: 12px;
  --shadow: 0 4px 12px rgba(31, 43, 42, 0.1);
}

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

html, body {
  font-family: var(--font-body);
  color: var(--color-dark);
  background-color: var(--color-parchment);
  line-height: 1.6;
}

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

a:hover {
  text-decoration: underline;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-headline);
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
}

h2 {
  font-size: 2.5rem;
  color: var(--color-teal);
}

h3 {
  font-size: 1.5rem;
  color: var(--color-dark);
}

p {
  font-size: 1rem;
  margin-bottom: var(--spacing-md);
}

/* Navigation */
.nav {
  background-color: var(--color-parchment);
  padding: var(--spacing-md) 0;
  border-bottom: 1px solid rgba(44, 110, 106, 0.1);
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-family: var(--font-headline);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--color-teal);
}

.app-badge {
  display: inline-block;
}

.app-badge svg {
  transition: all 0.3s ease;
}

.app-badge:hover svg {
  filter: drop-shadow(0 2px 8px rgba(44, 110, 106, 0.2));
}

/* Hero Section */
.hero {
  background: linear-gradient(135deg, var(--color-parchment) 0%, var(--color-light-bg) 100%);
  position: relative;
  padding: var(--spacing-xl) var(--spacing-md);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: url('topo.svg');
  background-size: 400px 400px;
  opacity: 0.15;
  pointer-events: none;
}

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

.hero-headline {
  font-family: var(--font-headline);
  font-size: 3.5rem;
  line-height: 1.1;
  color: var(--color-teal);
  margin-bottom: var(--spacing-lg);
  min-height: 160px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-headline span {
  position: absolute;
  opacity: 0;
  animation: headline-rotate 12s infinite;
  font-weight: 700;
}

.hero-headline span:nth-child(1) {
  animation-delay: 0s;
}

.hero-headline span:nth-child(2) {
  animation-delay: 4s;
}

.hero-headline span:nth-child(3) {
  animation-delay: 8s;
}

@keyframes headline-rotate {
  0% {
    opacity: 1;
  }
  25% {
    opacity: 1;
  }
  33% {
    opacity: 0;
  }
  100% {
    opacity: 0;
  }
}

.hero-subhead {
  font-size: 1.25rem;
  color: var(--color-dark);
  margin-bottom: var(--spacing-lg);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius);
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: all 0.3s ease;
  text-decoration: none;
}

.btn-primary {
  background-color: var(--color-teal);
  color: var(--color-white);
  margin-bottom: var(--spacing-xl);
}

.btn-primary:hover {
  background-color: #1f4d4a;
  transform: translateY(-2px);
  box-shadow: 0 8px 16px rgba(44, 110, 106, 0.3);
}

/* iPhone Mockup */
.iphone-mockup {
  width: 280px;
  height: 560px;
  background: var(--color-teal);
  border-radius: 40px;
  margin: var(--spacing-xl) auto 0;
  border: 10px solid var(--color-dark);
  box-shadow: 0 20px 60px rgba(31, 43, 42, 0.3);
  position: relative;
}

.iphone-mockup::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 150px;
  height: 25px;
  background: var(--color-dark);
  border-radius: 0 0 20px 20px;
  z-index: 10;
}

/* Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

/* How It Works */
.how-it-works {
  padding: var(--spacing-xl) var(--spacing-md);
  background-color: var(--color-white);
}

.steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-lg);
}

.step {
  text-align: center;
}

.step-icon {
  font-size: 3rem;
  margin-bottom: var(--spacing-md);
  display: block;
}

.step h3 {
  color: var(--color-teal);
  margin-bottom: var(--spacing-sm);
}

.step p {
  color: #666;
  font-size: 0.95rem;
}

/* Use Cases */
.use-cases {
  padding: var(--spacing-xl) var(--spacing-md);
  background-color: var(--color-light-bg);
}

.use-cases-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-lg);
}

.use-case-card {
  background: var(--color-white);
  padding: var(--spacing-lg);
  border-radius: var(--radius);
  text-align: center;
  box-shadow: var(--shadow);
  transition: all 0.3s ease;
  border: 2px solid transparent;
}

.use-case-card:hover {
  border-color: var(--color-coral);
  transform: translateY(-4px);
  box-shadow: 0 12px 24px rgba(232, 115, 74, 0.15);
}

.use-case-emoji {
  font-size: 3rem;
  margin-bottom: var(--spacing-md);
  display: block;
}

.use-case-card h3 {
  color: var(--color-dark);
  margin-bottom: var(--spacing-sm);
}

.use-case-card p {
  color: #666;
  font-size: 0.95rem;
  margin-bottom: 0;
}

/* Pricing */
.pricing {
  padding: var(--spacing-xl) var(--spacing-md);
  background-color: var(--color-white);
}

.pricing-subhead {
  font-size: 1.1rem;
  color: var(--color-coral);
  text-align: center;
  margin-bottom: var(--spacing-lg);
  font-weight: 600;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-lg);
}

.pricing-card {
  background: var(--color-light-bg);
  padding: var(--spacing-lg);
  border-radius: var(--radius);
  border: 2px solid #DDD;
  transition: all 0.3s ease;
}

.pricing-card h3 {
  margin-bottom: var(--spacing-md);
  font-size: 1.8rem;
}

.pricing-card ul {
  list-style: none;
}

.pricing-card li {
  padding: var(--spacing-sm) 0;
  color: var(--color-dark);
}

.pricing-card-premium {
  background: var(--color-teal);
  color: var(--color-white);
  border-color: var(--color-teal);
  transform: scale(1.05);
  box-shadow: 0 12px 32px rgba(44, 110, 106, 0.2);
}

.pricing-card-premium h3,
.pricing-card-premium li {
  color: var(--color-white);
}

/* Privacy Strip */
.privacy-strip {
  background-color: var(--color-teal);
  color: var(--color-white);
  padding: var(--spacing-xl) var(--spacing-md);
}

.privacy-content {
  text-align: center;
}

.privacy-content h3 {
  color: var(--color-white);
  margin-bottom: var(--spacing-lg);
  font-size: 2rem;
}

.privacy-features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-lg);
}

.privacy-feature {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-sm);
}

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

.privacy-feature span {
  font-size: 1rem;
}

/* Footer */
.footer {
  background-color: var(--color-dark);
  color: var(--color-white);
  padding: var(--spacing-lg) var(--spacing-md);
}

.footer-content {
  text-align: center;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-lg);
  align-items: center;
}

.footer-logo {
  font-family: var(--font-headline);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--color-coral);
}

.footer-links {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
}

.footer-links a {
  color: var(--color-white);
  transition: color 0.3s ease;
}

.footer-links a:hover {
  color: var(--color-coral);
  text-decoration: none;
}

/* Responsive */
@media (max-width: 768px) {
  .hero-headline {
    font-size: 2rem;
    min-height: 120px;
  }

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

  h2 {
    font-size: 1.8rem;
  }

  .nav-container {
    flex-direction: column;
    gap: var(--spacing-md);
  }

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

  .footer-content {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }

  .hero {
    min-height: auto;
    padding: var(--spacing-lg) var(--spacing-md);
  }

  .iphone-mockup {
    width: 220px;
    height: 440px;
  }
}

@media (max-width: 480px) {
  :root {
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
  }

  .hero-headline {
    font-size: 1.5rem;
    min-height: 100px;
  }

  h2 {
    font-size: 1.5rem;
  }

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

  .iphone-mockup {
    width: 180px;
    height: 360px;
  }
}