:root {
  --bg-color: #0f172a;
  --text-color: #f8fafc;
  --primary-color: #3b82f6;
  --secondary-color: #64748b;
  --accent-color: #8b5cf6;
  --card-bg: #1e293b;
  --font-main: 'Inter', sans-serif;
}

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

body {
  font-family: var(--font-main);
  background-color: var(--bg-color);
  color: var(--text-color);
  line-height: 1.6;
  overflow-x: hidden;
}

a {
  text-decoration: none;
  color: inherit;
  transition: color 0.3s ease;
}

ul {
  list-style: none;
}

/* Header */
header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.5rem 2rem;
  background: rgba(15, 23, 42, 0.8);
  backdrop-filter: blur(10px);
  position: fixed;
  width: 100%;
  top: 0;
  z-index: 1000;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  background: linear-gradient(to right, var(--primary-color), var(--accent-color));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  letter-spacing: -0.05em;
}

nav ul {
  display: flex;
  gap: 2rem;
}

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

/* Hero Section */
.hero {
  height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 0 2rem;
  background: radial-gradient(circle at top right, rgba(59, 130, 246, 0.1), transparent 40%),
              radial-gradient(circle at bottom left, rgba(139, 92, 246, 0.1), transparent 40%);
}

.hero h1 {
  font-size: 4rem;
  font-weight: 800;
  margin-bottom: 1rem;
  line-height: 1.1;
}

.hero p {
  font-size: 1.25rem;
  color: var(--secondary-color);
  margin-bottom: 2rem;
  max-width: 600px;
}

.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  background-color: var(--primary-color);
  color: white;
  border-radius: 9999px;
  font-weight: 600;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}

/* Apps Section */
.section {
  padding: 5rem 2rem;
  max-width: 1200px;
  margin: 0 auto;
}

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

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

.app-card {
  background-color: var(--card-bg);
  padding: 2rem;
  border-radius: 1rem;
  border: 1px solid rgba(255, 255, 255, 0.05);
  transition: transform 0.3s ease, border-color 0.3s ease;
}

.app-card:hover {
  transform: translateY(-5px);
  border-color: var(--primary-color);
}

.app-icon {
  width: 64px;
  height: 64px;
  background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
  border-radius: 16px;
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
}

.app-card h3 {
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
}

.app-card p {
  color: var(--secondary-color);
  margin-bottom: 1.5rem;
}

.app-link {
  color: var(--primary-color);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

/* Feedback Section */
.feedback {
  text-align: center;
  background: linear-gradient(to bottom, var(--bg-color), #000);
}

.feedback-form {
  max-width: 500px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.input-group {
  text-align: left;
}

.input-group label {
  display: block;
  margin-bottom: 0.5rem;
  color: var(--secondary-color);
  font-size: 0.9rem;
}

input, textarea {
  width: 100%;
  padding: 0.75rem;
  background-color: var(--card-bg);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 0.5rem;
  color: var(--text-color);
  font-family: inherit;
  transition: border-color 0.3s ease;
}

input:focus, textarea:focus {
  outline: none;
  border-color: var(--primary-color);
}

/* Footer */
footer {
  text-align: center;
  padding: 2rem;
  color: var(--secondary-color);
  font-size: 0.9rem;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}

/* Responsive */
@media (max-width: 768px) {
  .hero h1 {
    font-size: 2.5rem;
  }
  
  nav {
    display: none; /* Simple mobile menu hidden for MVP */
  }
}