/* Reset & Global Styles */
* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: 'Inter', sans-serif; background-color: #f5f6fa; color: #333; line-height: 1.6; }

/* Navbar */
nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 4%;
  background-color: #fff;
  box-shadow: 0 2px 4px rgba(0,0,0,0.05);
  position: sticky;
  top: 0;
  z-index: 100;
}
nav .logo { font-weight: 700; font-size: 1.5rem; color: #4f46e5; }
nav ul { display: flex; list-style: none; gap: 2rem; }
nav ul li a { text-decoration: none; color: #333; font-weight: 500; transition: 0.2s; }
nav ul li a:hover { color: #4f46e5; }

/* Hero Section */
.hero {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 6rem 2rem 4rem;
  background: linear-gradient(135deg, #4f46e5, #6366f1);
  color: #fff;
}
.hero h1 { font-size: 3rem; font-weight: 700; margin-bottom: 1rem; }
.hero p { font-size: 1.2rem; max-width: 700px; margin-bottom: 2rem; }
.hero .btn {
  background-color: #fff;
  color: #4f46e5;
  padding: 0.8rem 2rem;
  border-radius: 8px;
  font-weight: 600;
  text-decoration: none;
  transition: 0.3s;
}
.hero .btn:hover { background-color: #e0e7ff; }

/* Features Section */
.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
  padding: 4rem 4%;
}
.feature-card {
  background-color: #fff;
  padding: 2rem;
  border-radius: 12px;
  box-shadow: 0 6px 20px rgba(0,0,0,0.05);
  text-align: center;
  transition: transform 0.3s;
}
.feature-card:hover { transform: translateY(-5px); }
.feature-card h2 { font-size: 1.5rem; margin-bottom: 1rem; color: #4f46e5; }
.feature-card p { font-size: 1rem; color: #555; }

/* Download Section */
.download {
  text-align: center;
  padding: 4rem 2rem;
}
.download h2 { font-size: 2rem; margin-bottom: 1rem; color: #4f46e5; }
.download p { font-size: 1.1rem; margin-bottom: 2rem; color: #555; }
.download .btn { padding: 1rem 2.5rem; font-size: 1.1rem; }

/* Footer */
footer {
  text-align: center;
  padding: 2rem 4%;
  background-color: #fff;
  color: #777;
  font-size: 0.9rem;
  box-shadow: 0 -2px 4px rgba(0,0,0,0.05);
}

/* Responsive */
@media (max-width: 768px) {
  .hero h1 { font-size: 2.2rem; }
  .features { padding: 2rem 2%; }
}

/* Contact Section */
.contact {
  padding: 4rem 4%;
  background-color: #f5f6fa;
  display: flex;
  justify-content: center;
}
.contact-container {
  max-width: 600px;
  width: 100%;
  background-color: #fff;
  padding: 3rem 2rem;
  border-radius: 12px;
  box-shadow: 0 6px 20px rgba(0,0,0,0.05);
  text-align: center;
}
.contact-container h1 { font-size: 2rem; color: #4f46e5; margin-bottom: 1rem; }
.contact-container p { font-size: 1rem; margin-bottom: 2rem; color: #555; }
.contact-form { display: flex; flex-direction: column; gap: 1rem; }
.contact-form label { text-align: left; font-weight: 600; color: #333; }
.contact-form input,
.contact-form textarea {
  padding: 0.8rem;
  border-radius: 8px;
  border: 1px solid #ccc;
  font-size: 1rem;
}
.contact-form button.btn {
  margin-top: 1rem;
  background-color: #4f46e5;
  color: #fff;
  border: none;
  cursor: pointer;
  transition: 0.3s;
}
.contact-form button.btn:hover { background-color: #6366f1; }
.contact-info { margin-top: 2rem; font-size: 0.95rem; color: #555; }
.contact-info a { color: #4f46e5; text-decoration: none; }
.contact-info a:hover { text-decoration: underline; }

/* Responsive */
@media (max-width: 768px) {
  .contact-container { padding: 2rem 1rem; }
}

/* Features Page */
.features-page {
  padding: 4rem 4%;
  background-color: #f5f6fa;
}
.features-container {
  max-width: 1000px;
  margin: 0 auto;
  text-align: center;
}
.features-container h1 { font-size: 2.5rem; margin-bottom: 1rem; color: #4f46e5; }
.features-container p { font-size: 1.1rem; margin-bottom: 3rem; color: #555; }

/* Feature Cards */
.features-container .feature-card {
  background-color: #fff;
  padding: 2rem;
  border-radius: 12px;
  box-shadow: 0 6px 20px rgba(0,0,0,0.05);
  margin-bottom: 2rem;
  text-align: left;
  transition: transform 0.3s;
}
.features-container .feature-card:hover {
  transform: translateY(-5px);
}
.features-container .feature-card h2 { font-size: 1.5rem; margin-bottom: 0.5rem; color: #4f46e5; }
.features-container .feature-card p { font-size: 1rem; color: #555; }

/* Download Section */
.download-section { margin-top: 3rem; text-align: center; }
.download-section .btn { padding: 1rem 2.5rem; font-size: 1.1rem; }

/* Responsive */
@media (max-width: 768px) {
  .features-container h1 { font-size: 2rem; }
  .features-container .feature-card { padding: 1.5rem; }
}

/* Download Page */
.download-page {
  padding: 4rem 4%;
  background-color: #f5f6fa;
  text-align: center;
}
.download-container { max-width: 1000px; margin: 0 auto; }
.download-container h1 { font-size: 2.5rem; margin-bottom: 1rem; color: #4f46e5; }
.download-container p { font-size: 1.1rem; margin-bottom: 3rem; color: #555; }

.download-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
}
.download-card {
  background-color: #fff;
  padding: 2rem;
  border-radius: 12px;
  box-shadow: 0 6px 20px rgba(0,0,0,0.05);
  transition: transform 0.3s;
}
.download-card:hover { transform: translateY(-5px); }
.download-card h2 { font-size: 1.5rem; margin: 1rem 0 0.5rem; color: #4f46e5; }
.download-card p { color: #555; margin-bottom: 1.5rem; }
.download-card .btn {
  padding: 0.8rem 2rem;
  border-radius: 8px;
  background-color: #4f46e5;
  color: #fff;
  text-decoration: none;
  font-weight: 600;
  transition: 0.3s;
}
.download-card .btn:hover { background-color: #6366f1; }

.os-icon { width: 60px; height: 60px; margin-bottom: 1rem; }

/* Responsive */
@media (max-width: 768px) {
  .download-container h1 { font-size: 2rem; }
  .download-card { padding: 1.5rem; }
}