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

:root {
  --primary-blue: #4285f4;
  --dark-blue: #1a73e8;
  --light-blue: #e8f0fe;
  --text-dark: #1a1a2e;
  --text-gray: #5f6c7b;
  --text-light: #8e8e93;
  --bg-light: #f5f7fa;
  --bg-white: #ffffff;
  --border-color: #e0e7ee;
  --shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.15);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  line-height: 1.6;
  color: var(--text-dark);
  background: var(--bg-white);
}

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

/* Navigation */
.navbar {
  background: var(--bg-white);
  box-shadow: var(--shadow);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.navbar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 20px;
}

.nav-brand h1 {
  font-size: 24px;
  color: var(--primary-blue);
  font-weight: 700;
}

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

.nav-links a {
  color: var(--text-dark);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.3s ease;
}

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

/* Hero Section */
.hero {
  padding: 80px 0;
  background: linear-gradient(135deg, var(--light-blue) 0%, var(--bg-white) 100%);
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.hero-title {
  font-size: 48px;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 1rem;
  line-height: 1.2;
}

.hero-subtitle {
  font-size: 20px;
  color: var(--text-gray);
  margin-bottom: 2rem;
  line-height: 1.6;
}

.hero-buttons {
  display: flex;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.version-info {
  color: var(--text-light);
  font-size: 14px;
}

.hero-image {
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-image .screenshot {
  max-width: 100%;
  height: auto;
  border-radius: 12px;
  box-shadow: var(--shadow-lg);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: 8px;
  font-size: 16px;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.3s ease;
  cursor: pointer;
  border: none;
}

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

.btn-primary:hover {
  background: var(--dark-blue);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(66, 133, 244, 0.4);
}

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

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

.btn-large {
  padding: 16px 32px;
  font-size: 18px;
}

.btn-kofi {
  background: linear-gradient(135deg, #ff5e5b 0%, #ff3838 100%);
  color: white;
  box-shadow: var(--shadow);
}

.btn-kofi:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(255, 62, 56, 0.4);
}

.btn-paypal {
  background: linear-gradient(135deg, #0070ba 0%, #003087 100%);
  color: white;
  box-shadow: var(--shadow);
}

.btn-paypal:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 112, 186, 0.4);
}

.btn-icon {
  font-size: 20px;
}

/* Sections */
section {
  padding: 80px 0;
}

.section-title {
  font-size: 36px;
  font-weight: 700;
  text-align: center;
  margin-bottom: 3rem;
  color: var(--text-dark);
}

/* Features Section */
.features {
  background: var(--bg-light);
}

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

.feature-card {
  background: var(--bg-white);
  padding: 2rem;
  border-radius: 12px;
  box-shadow: var(--shadow);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.feature-icon {
  font-size: 48px;
  margin-bottom: 1rem;
}

.feature-card h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 0.5rem;
  color: var(--text-dark);
}

.feature-card p {
  color: var(--text-gray);
  line-height: 1.6;
}

/* Screenshots Section */
.screenshots {
  background: var(--bg-white);
}

.screenshots-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
  gap: 3rem;
  margin-top: 3rem;
}

.screenshot-item {
  text-align: center;
}

.screenshot-item img {
  width: 100%;
  max-width: 400px;
  height: auto;
  border-radius: 12px;
  box-shadow: var(--shadow-lg);
  margin-bottom: 1rem;
}

.screenshot-item p {
  color: var(--text-gray);
  font-size: 16px;
}

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

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

.download-description {
  font-size: 18px;
  margin-bottom: 2rem;
  opacity: 0.95;
}

.download-buttons {
  margin-bottom: 2rem;
}

.download-info {
  font-size: 14px;
  opacity: 0.9;
  line-height: 1.8;
}

/* Support Section */
.support {
  background: var(--bg-light);
  text-align: center;
}

.support-description {
  font-size: 18px;
  color: var(--text-gray);
  margin-bottom: 2rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.support-buttons {
  display: flex;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
}

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

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
  margin-bottom: 2rem;
}

.footer-section h3 {
  font-size: 20px;
  margin-bottom: 1rem;
}

.footer-section h4 {
  font-size: 16px;
  margin-bottom: 1rem;
  font-weight: 600;
}

.footer-section p {
  opacity: 0.8;
  font-size: 14px;
  line-height: 1.6;
}

.footer-section ul {
  list-style: none;
}

.footer-section ul li {
  margin-bottom: 0.5rem;
}

.footer-section a {
  color: white;
  text-decoration: none;
  opacity: 0.8;
  transition: opacity 0.3s ease;
}

.footer-section a:hover {
  opacity: 1;
}

/* Responsive Design */
@media (max-width: 768px) {
  .hero-content {
    grid-template-columns: 1fr;
    gap: 40px;
    text-align: center;
  }

  .hero-title {
    font-size: 36px;
  }

  .hero-subtitle {
    font-size: 18px;
  }

  .hero-buttons {
    justify-content: center;
    flex-direction: column;
  }

  .nav-links {
    gap: 1rem;
    font-size: 14px;
  }

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

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

  .section-title {
    font-size: 28px;
  }

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

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

@media (max-width: 480px) {
  .navbar .container {
    flex-direction: column;
    gap: 1rem;
  }

  .hero-title {
    font-size: 28px;
  }

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

/* Smooth Scroll */
html {
  scroll-behavior: smooth;
}

/* Animations */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.feature-card,
.screenshot-item {
  animation: fadeIn 0.6s ease-out;
}