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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  line-height: 1.6;
  color: #333;
  background: #f5f5f5;
}

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

/* Navbar */
.navbar {
  background: #fff;
  box-shadow: 0 2px 10px rgba(0,0,0,0.1);
  position: sticky;
  top: 0;
  z-index: 100;
}

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

.nav-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 24px;
  font-weight: bold;
  color: #2563eb;
  text-decoration: none;
  transition: color 0.3s;
}

.nav-brand:hover {
  color: #1d4ed8;
}

.nav-logo {
  width: 36px;
  height: 36px;
  border-radius: 8px;
}

.nav-links {
  display: flex;
  gap: 30px;
  align-items: center;
}

.nav-links a {
  color: #666;
  text-decoration: none;
  transition: color 0.3s;
}

.nav-links a:hover {
  color: #2563eb;
}

.nav-admin {
  padding: 8px 16px;
  background: #f3f4f6;
  border-radius: 6px;
}

/* Hero Section */
.hero {
  background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
  color: white;
  padding: 100px 20px;
  text-align: center;
}

.hero h1 {
  font-size: 48px;
  margin-bottom: 20px;
}

.tagline {
  font-size: 24px;
  margin-bottom: 15px;
  opacity: 0.9;
}

.description {
  font-size: 18px;
  max-width: 600px;
  margin: 0 auto 40px;
  opacity: 0.9;
}

.download-buttons {
  display: flex;
  gap: 20px;
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 32px;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 600;
  font-size: 16px;
  transition: all 0.3s;
  border: none;
  cursor: pointer;
}

.btn-primary {
  background: #fff;
  color: #2563eb;
}

.btn-primary:hover {
  background: #f3f4f6;
  transform: translateY(-2px);
}

.btn-secondary {
  background: rgba(255,255,255,0.2);
  color: #fff;
  border: 2px solid #fff;
}

.btn-secondary:hover {
  background: rgba(255,255,255,0.3);
  transform: translateY(-2px);
}

/* Screenshots Section */
.screenshots {
  padding: 80px 20px;
  background: #fff;
}

.screenshots h2 {
  text-align: center;
  font-size: 36px;
  margin-bottom: 50px;
  color: #1f2937;
}

.screenshot-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 30px;
  max-width: 1000px;
  margin: 0 auto;
}

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

.screenshot-item img {
  width: 100%;
  height: auto;
  border-radius: 12px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.15);
  transition: transform 0.3s;
}

.screenshot-item img:hover {
  transform: scale(1.05);
}

.screenshot-item p {
  margin-top: 15px;
  color: #666;
  font-size: 14px;
}

/* Features Section */
.features {
  padding: 80px 20px;
  background: #f9fafb;
}

.features h2 {
  text-align: center;
  font-size: 36px;
  margin-bottom: 50px;
  color: #1f2937;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
  max-width: 1000px;
  margin: 0 auto;
}

.feature-item {
  background: white;
  padding: 30px;
  border-radius: 12px;
  box-shadow: 0 4px 15px rgba(0,0,0,0.08);
  transition: transform 0.3s, box-shadow 0.3s;
}

.feature-item:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 25px rgba(0,0,0,0.12);
}

.feature-item h3 {
  color: #2563eb;
  margin-bottom: 12px;
  font-size: 20px;
}

.feature-item p {
  color: #666;
  line-height: 1.6;
}

/* Use Cases Section */
.use-cases {
  padding: 80px 20px;
  background: white;
}

.use-cases h2 {
  text-align: center;
  font-size: 36px;
  margin-bottom: 30px;
  color: #1f2937;
}

.use-cases-list {
  list-style: none;
  max-width: 600px;
  margin: 0 auto 40px;
  padding: 0;
}

.use-cases-list li {
  padding: 15px 20px;
  margin-bottom: 10px;
  background: #f3f4f6;
  border-radius: 8px;
  position: relative;
  padding-left: 50px;
  font-size: 18px;
  color: #374151;
}

.use-cases-list li:before {
  content: "✓";
  position: absolute;
  left: 20px;
  color: #2563eb;
  font-weight: bold;
  font-size: 20px;
}

.privacy-note {
  text-align: center;
  max-width: 700px;
  margin: 0 auto;
  padding: 25px;
  background: #eff6ff;
  border-left: 4px solid #2563eb;
  border-radius: 8px;
  font-size: 16px;
  color: #1e40af;
  font-weight: 500;
}

/* Privacy Content */
.privacy-content {
  background: white;
  padding: 40px;
  border-radius: 10px;
  max-width: 800px;
  margin: 0 auto;
}

.privacy-content h1 {
  color: #1f2937;
  margin-bottom: 20px;
}

.privacy-content h2 {
  color: #374151;
  margin-top: 30px;
  margin-bottom: 15px;
}

.privacy-content p {
  margin-bottom: 15px;
  line-height: 1.8;
}

/* Footer */
footer {
  background: #1f2937;
  color: white;
  padding: 40px 20px;
  text-align: center;
}

footer a {
  color: #93c5fd;
  text-decoration: none;
}

footer a:hover {
  text-decoration: underline;
}

/* Login Page */
.login-page {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
}

.login-container {
  width: 100%;
  max-width: 400px;
  padding: 20px;
}

.login-box {
  background: white;
  padding: 40px;
  border-radius: 12px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.3);
}

.login-box h1 {
  text-align: center;
  margin-bottom: 30px;
  color: #1f2937;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  margin-bottom: 8px;
  color: #374151;
  font-weight: 500;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 12px;
  border: 1px solid #d1d5db;
  border-radius: 6px;
  font-size: 14px;
  font-family: inherit;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: #2563eb;
  box-shadow: 0 0 0 3px rgba(37,99,235,0.1);
}

.btn-block {
  width: 100%;
}

.alert {
  padding: 12px;
  border-radius: 6px;
  margin-bottom: 20px;
}

.alert-error {
  background: #fee2e2;
  color: #991b1b;
  border: 1px solid #fecaca;
}

.alert-success {
  background: #d1fae5;
  color: #065f46;
  border: 1px solid #a7f3d0;
}

/* Responsive */
@media (max-width: 768px) {
  .hero h1 {
    font-size: 36px;
  }
  
  .tagline {
    font-size: 20px;
  }
  
  .nav-links {
    gap: 15px;
    font-size: 14px;
  }
  
  .screenshot-grid {
    grid-template-columns: 1fr;
  }
}