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

:root {
  /* Planzu Brand Colors */
  --teal-primary: #0a838e;
  --teal-dark: #087880;
  --teal-light: #0d9fad;
  --teal-bg: #a8d5d8;
  --teal-subtle: #e0f2f3;

  /* Accent Colors */
  --coral-accent: #e08c7c;
  --peach-accent: #f4a582;
  --warm-beige: #f5f1e8;

  /* Neutrals */
  --gray-dark: #2d3748;
  --gray-medium: #4a5568;
  --gray-light: #e2e8f0;
  --white: #ffffff;

  /* Typography */
  --font-display: 'Lobster', cursive;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;

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

  /* Layout */
  --max-width: 1200px;
  --border-radius: 12px;
}

body {
  font-family: var(--font-body);
  color: var(--gray-dark);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  background-color: var(--white);
}

h1, h2, h3, h4, h5, h6 {
  line-height: 1.2;
  font-weight: 600;
}

a {
  color: inherit;
  text-decoration: none;
}

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

/* ====================================
   Hero Section
   ==================================== */
.hero {
  min-height: 85vh;
  background: linear-gradient(135deg, var(--teal-light) 0%, var(--teal-primary) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--spacing-lg) var(--spacing-md);
  position: relative;
  overflow: hidden;
}

.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"><circle cx="50" cy="50" r="2" fill="rgba(255,255,255,0.1)"/></svg>');
  background-size: 50px 50px;
  opacity: 0.3;
}

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

.logo {
  font-family: var(--font-display);
  font-size: clamp(4rem, 10vw, 7rem);
  color: var(--white);
  margin-bottom: var(--spacing-md);
  text-shadow: 2px 4px 8px rgba(0, 0, 0, 0.2);
}

.tagline {
  font-size: clamp(1.25rem, 3vw, 1.75rem);
  color: var(--white);
  margin-bottom: var(--spacing-lg);
  font-weight: 300;
  opacity: 0.95;
}

.hero-subtitle {
    font-size: clamp(0.75rem, 2vw, 1.25rem);
  color: var(--white);
  margin-bottom: var(--spacing-lg);
  font-weight: 300;
  opacity: 0.75;
}

.cta-button {
  display: inline-block;
  background-color: var(--coral-accent);
  color: var(--white);
  padding: 1rem 2.5rem;
  border-radius: var(--border-radius);
  font-size: 1.125rem;
  font-weight: 600;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
  transition: all 0.3s ease;
}

.cta-button:hover {
  background-color: #d67868;
  transform: translateY(-2px);
  box-shadow: 0 6px 25px rgba(0, 0, 0, 0.2);
}

/* ====================================
   Showcase Section
   ==================================== */
.showcase {
  padding: var(--spacing-xl) var(--spacing-md);
  background-color: var(--teal-subtle);
}

.showcase-content {
  max-width: var(--max-width);
  margin: 0 auto;
  text-align: center;
}

.showcase h2 {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 5vw, 3.5rem);
  color: var(--teal-primary);
  margin-bottom: var(--spacing-sm);
}

.subtitle {
  font-size: 1.25rem;
  color: var(--gray-medium);
  margin-bottom: var(--spacing-lg);
  font-weight: 300;
}

.screenshot-container {
  background: var(--white);
  padding: var(--spacing-md);
  border-radius: var(--border-radius);
  box-shadow: 0 10px 40px rgba(10, 131, 142, 0.15);
}

.screenshot-main {
  width: 100%;
  border-radius: 8px;
}

/* ====================================
   Features Section
   ==================================== */
.features {
  padding: var(--spacing-xl) var(--spacing-md);
  background-color: var(--white);
}

.feature-row {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xl);
}

.feature-card {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-lg);
  align-items: center;
}

.feature-card.reverse {
  direction: rtl;
}

.feature-card.reverse > * {
  direction: ltr;
}

.feature-image {
  background: var(--teal-subtle);
  padding: var(--spacing-md);
  border-radius: var(--border-radius);
  box-shadow: 0 4px 20px rgba(10, 131, 142, 0.1);
}

.feature-image img {
  border-radius: 8px;
}

.feature-content h3 {
  font-size: 2rem;
  color: var(--teal-primary);
  margin-bottom: var(--spacing-sm);
}

.feature-content p {
  font-size: 1.125rem;
  color: var(--gray-medium);
  line-height: 1.8;
}

/* ====================================
   Principles Section
   ==================================== */
.principles {
  padding: var(--spacing-xl) var(--spacing-md);
  background: linear-gradient(180deg, var(--white) 0%, var(--teal-subtle) 100%);
}

.principles-content {
  max-width: var(--max-width);
  margin: 0 auto;
  text-align: center;
}

.principles h2 {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 5vw, 3.5rem);
  color: var(--teal-primary);
  margin-bottom: var(--spacing-lg);
}

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

.principle-card {
  background: var(--white);
  padding: var(--spacing-md);
  border-radius: var(--border-radius);
  box-shadow: 0 4px 15px rgba(10, 131, 142, 0.08);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.principle-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 25px rgba(10, 131, 142, 0.15);
}

.principle-card h4 {
  font-size: 1.25rem;
  color: var(--teal-dark);
  margin-bottom: var(--spacing-sm);
}

.principle-card p {
  font-size: 1rem;
  color: var(--gray-medium);
  line-height: 1.6;
}

/* ====================================
   CTA Section
   ==================================== */
.cta-section {
  padding: var(--spacing-xl) var(--spacing-md);
  background: linear-gradient(135deg, var(--teal-primary) 0%, var(--teal-light) 100%);
  text-align: center;
}

.cta-content {
  max-width: 700px;
  margin: 0 auto;
}

.cta-section h2 {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 5vw, 3.5rem);
  color: var(--white);
  margin-bottom: var(--spacing-md);
}

.cta-section p {
  font-size: 1.25rem;
  color: var(--white);
  margin-bottom: var(--spacing-lg);
  opacity: 0.95;
  font-weight: 300;
  line-height: 1.7;
}

/* ====================================
   Footer
   ==================================== */
footer {
  padding: var(--spacing-lg) var(--spacing-md);
  background-color: var(--teal-dark);
  color: var(--white);
  text-align: center;
}

.footer-year {
  margin-bottom: var(--spacing-sm);
  opacity: 0.9;
}

.footer-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
}

.footer-nav a {
  opacity: 0.9;
  transition: opacity 0.3s ease;
}

.footer-nav a:hover {
  opacity: 1;
  text-decoration: underline;
}

.footer-nav span {
  opacity: 0.5;
}

/* ====================================
   Responsive Design
   ==================================== */
@media (max-width: 768px) {
  .hero {
    min-height: 70vh;
    padding: var(--spacing-lg) var(--spacing-sm);
  }

  .logo {
    font-size: 3.5rem;
  }

  .tagline {
    font-size: 1.125rem;
  }

  .showcase,
  .features,
  .principles,
  .cta-section {
    padding: var(--spacing-lg) var(--spacing-sm);
  }

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

  .feature-card.reverse {
    direction: ltr;
  }

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

  .cta-button {
    padding: 0.875rem 2rem;
    font-size: 1rem;
  }
}

@media (max-width: 480px) {
  .logo {
    font-size: 3rem;
  }

  .showcase h2,
  .principles h2,
  .cta-section h2 {
    font-size: 2rem;
  }

  .feature-content h3 {
    font-size: 1.5rem;
  }
}