:root {
  --primary: #059669;
  --primary-dark: #047857;
  --primary-light: #10b981;
  --success: #10b981;
  --success-dark: #059669;
  --bg: #f0fdf4;
  --card-bg: #ffffff;
  --text: #1f2937;
  --text-light: #6b7280;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 6px rgba(5, 150, 105, 0.1);
  --shadow-lg: 0 10px 24px rgba(5, 150, 105, 0.15);
  --radius: 10px;
  --radius-lg: 14px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', sans-serif;
  background: linear-gradient(135deg, #f0fdf4 0%, #dcfce7 100%);
  color: var(--text);
  margin: 0;
  padding: 0;
  line-height: 1.65;
  min-height: 100vh;
}

header {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: #fff;
  padding: 1.5rem 2rem;
  box-shadow: var(--shadow-lg);
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(10px);
}

header h1 {
  margin: 0 0 0.5rem 0;
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  background: linear-gradient(to right, #fff, #d1fae5);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

nav {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

nav a {
  color: rgba(255, 255, 255, 0.9);
  margin-right: 1rem;
  text-decoration: none;
  font-weight: 500;
  padding: 0.5rem 1rem;
  border-radius: 8px;
  transition: var(--transition);
  position: relative;
}

nav a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background: #fff;
  transition: width 0.3s ease;
}

nav a:hover {
  background: rgba(255, 255, 255, 0.1);
}

nav a:hover::after {
  width: 80%;
}

main {
  max-width: 920px;
  margin: 2.5rem auto;
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: 2.5rem 3rem;
  animation: fadeIn 0.6s ease-out;
}

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

footer {
  text-align: center;
  color: var(--text-light);
  font-size: 0.9rem;
  margin: 2rem 0 1.5rem 0;
  padding: 1.5rem;
}

.app-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

@media (min-width: 768px) {
  .app-list {
    grid-template-columns: repeat(2, 1fr);
  }
}

.app-list article {
  border: 1px solid #d1fae5;
  border-radius: var(--radius);
  padding: 1.75rem;
  transition: var(--transition);
  background: linear-gradient(135deg, #ffffff 0%, #f0fdf4 100%);
  display: flex;
  flex-direction: column;
  height: 100%;
}

.app-list article:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary);
}

.app-list h2 {
  margin: 0 0 0.75rem 0;
}

.app-list h2 a {
  color: var(--primary);
  text-decoration: none;
  transition: var(--transition);
}

.app-list h2 a:hover {
  color: var(--primary-dark);
}

.hero {
  text-align: center;
  margin-bottom: 2.5rem;
  padding: 1.5rem 0;
}

.hero h2 {
  font-size: 1.8rem;
  margin: 1rem 0;
  color: var(--text);
  line-height: 1.3;
}

.app-icon {
  width: 120px;
  height: 120px;
  border-radius: 24px;
  margin-bottom: 1.5rem;
  box-shadow: var(--shadow-lg);
  transition: var(--transition);
  border: 3px solid #fff;
}

.app-icon:hover {
  transform: scale(1.05) rotate(2deg);
}

.cta {
  display: inline-block;
  margin-top: 2rem;
  padding: 1rem 2.5rem;
  background: linear-gradient(135deg, var(--success) 0%, var(--success-dark) 100%);
  color: #fff;
  border-radius: var(--radius);
  font-size: 1.1rem;
  font-weight: 600;
  text-decoration: none;
  box-shadow: var(--shadow-md);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.cta::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.3);
  transform: translate(-50%, -50%);
  transition: width 0.6s, height 0.6s;
}

.cta:hover::before {
  width: 300px;
  height: 300px;
}

.cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(5, 150, 105, 0.4);
}

.screenshots {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  margin-top: 1.5rem;
  justify-items: center;
}

.screenshots img {
  width: 100%;
  max-width: 300px;
  height: auto;
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  background: #f1f5f9;
  transition: var(--transition);
  display: block;
}

.screenshots img:hover {
  transform: scale(1.05);
  box-shadow: var(--shadow-lg);
}

section {
  margin-bottom: 2.25rem;
  animation: slideIn 0.6s ease-out;
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateX(-20px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

h2, h3 {
  color: var(--primary);
  font-weight: 700;
  margin-bottom: 0.85rem;
}

h2 {
  font-size: 1.75rem;
  border-bottom: 3px solid var(--primary);
  display: inline-block;
  padding-bottom: 0.4rem;
  margin-top: 0.5rem;
}

h3 {
  font-size: 1.35rem;
  margin-top: 1.5rem;
}

h4 {
  font-size: 1.15rem;
  color: var(--text);
  font-weight: 600;
  margin: 1.25rem 0 0.75rem 0;
}

ul {
  padding-left: 1.5rem;
  margin-top: 0.75rem;
}

section > p {
  margin: 0.85rem 0;
  line-height: 1.7;
}

ul li {
  margin-bottom: 0.6rem;
  color: var(--text);
  position: relative;
  padding-left: 0.5rem;
  line-height: 1.6;
}

ul li::marker {
  color: var(--primary);
}

a {
  color: var(--primary);
  transition: var(--transition);
}

a:hover {
  color: var(--primary-dark);
}

/* Responsive Design */
@media (max-width: 768px) {
  header {
    padding: 1rem 1.5rem;
  }
  
  header h1 {
    font-size: 1.5rem;
  }
  
  main {
    margin: 1.25rem;
    padding: 1.5rem 1.25rem;
  }
  
  .hero h2 {
    font-size: 1.4rem;
  }
  
  .app-icon {
    width: 90px;
    height: 90px;
  }
  
  .screenshots {
    grid-template-columns: 1fr;
  }
}

/* Loading Animation */
@keyframes shimmer {
  0% {
    background-position: -1000px 0;
  }
  100% {
    background-position: 1000px 0;
  }
}

.loading {
  animation: shimmer 2s infinite;
  background: linear-gradient(to right, #f6f7f8 0%, #edeef1 20%, #f6f7f8 40%, #f6f7f8 100%);
  background-size: 1000px 100%;
}