:root {
  --primary-color: #0066cc;
  --primary-hover: #0052a3;
  --secondary-color: #64748b;
  --text-primary: #1e293b;
  --text-secondary: #64748b;
  --bg-light: #f8fafc;
  --bg-white: #ffffff;
  --border-color: #e2e8f0;
  --success-color: #10b981;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

* {
  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: var(--text-primary);
  background-color: var(--bg-white);
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.navbar {
  background-color: var(--bg-white);
  border-bottom: 1px solid var(--border-color);
  padding: 16px 0;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-sm);
}

.nav-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 24px;
  font-weight: 700;
  color: var(--primary-color);
  text-decoration: none;
}

.nav-links {
  display: flex;
  gap: 32px;
  align-items: center;
}

.nav-links a {
  color: var(--text-primary);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s;
}

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

.btn-login {
  padding: 8px 20px;
  background-color: var(--primary-color);
  color: white !important;
  border-radius: 6px;
  transition: background-color 0.2s;
}

.btn-login:hover {
  background-color: var(--primary-hover);
}

.hero {
  padding: 120px 0;
  background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
}

.hero-content {
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
}

.hero h1 {
  font-size: 56px;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 24px;
  color: var(--text-primary);
}

.hero-subtitle {
  font-size: 20px;
  color: var(--text-secondary);
  margin-bottom: 40px;
  line-height: 1.8;
}

.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
}

.btn-primary {
  padding: 14px 32px;
  background-color: var(--primary-color);
  color: white;
  text-decoration: none;
  border-radius: 8px;
  font-weight: 600;
  font-size: 16px;
  transition: all 0.2s;
  border: none;
  cursor: pointer;
  display: inline-block;
}

.btn-primary:hover {
  background-color: var(--primary-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-secondary {
  padding: 14px 32px;
  background-color: transparent;
  color: var(--primary-color);
  text-decoration: none;
  border-radius: 8px;
  font-weight: 600;
  font-size: 16px;
  border: 2px solid var(--primary-color);
  transition: all 0.2s;
  display: inline-block;
}

.btn-secondary:hover {
  background-color: var(--primary-color);
  color: white;
  transform: translateY(-2px);
}

.features {
  padding: 100px 0;
  background-color: var(--bg-white);
}

.features h2,
.how-it-works h2 {
  text-align: center;
  font-size: 42px;
  font-weight: 700;
  margin-bottom: 60px;
  color: var(--text-primary);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 32px;
}

.feature-card {
  padding: 32px;
  background-color: var(--bg-white);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  transition: all 0.3s;
}

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

.feature-icon {
  font-size: 48px;
  margin-bottom: 16px;
}

.feature-card h3 {
  font-size: 22px;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.feature-card p {
  color: var(--text-secondary);
  line-height: 1.8;
}

.how-it-works {
  padding: 100px 0;
  background-color: var(--bg-light);
}

.steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 40px;
  max-width: 1000px;
  margin: 0 auto;
}

.step {
  text-align: center;
}

.step-number {
  width: 64px;
  height: 64px;
  background-color: var(--primary-color);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  font-weight: 700;
  margin: 0 auto 20px;
}

.step h3 {
  font-size: 22px;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.step p {
  color: var(--text-secondary);
  line-height: 1.8;
}

.cta {
  padding: 100px 0;
  background: linear-gradient(135deg, var(--primary-color) 0%, #0052a3 100%);
  color: white;
}

.cta-content {
  text-align: center;
  max-width: 700px;
  margin: 0 auto;
}

.cta h2 {
  font-size: 42px;
  font-weight: 700;
  margin-bottom: 20px;
}

.cta p {
  font-size: 20px;
  margin-bottom: 40px;
  opacity: 0.95;
}

.cta .btn-primary {
  background-color: white;
  color: var(--primary-color);
}

.cta .btn-primary:hover {
  background-color: var(--bg-light);
}

.footer {
  padding: 60px 0 20px;
  background-color: var(--text-primary);
  color: white;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 40px;
  margin-bottom: 40px;
}

.footer h3 {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 16px;
}

.footer h4 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 16px;
}

.footer p {
  opacity: 0.8;
  line-height: 1.8;
}

.footer a {
  color: white;
  text-decoration: none;
  transition: opacity 0.2s;
}

.footer a:hover {
  opacity: 0.8;
}

.footer ul {
  list-style: none;
}

.footer ul li {
  margin-bottom: 8px;
}

.footer-bottom {
  text-align: center;
  padding-top: 30px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  opacity: 0.8;
}

.login-section {
  min-height: calc(100vh - 200px);
  padding: 80px 0;
  background-color: var(--bg-light);
}

.login-container {
  display: flex;
  justify-content: center;
  align-items: center;
}

.login-box {
  background-color: var(--bg-white);
  padding: 48px;
  border-radius: 12px;
  box-shadow: var(--shadow-lg);
  width: 100%;
  max-width: 450px;
}

.login-box h1 {
  font-size: 32px;
  font-weight: 700;
  margin-bottom: 8px;
  text-align: center;
  color: var(--text-primary);
}

.login-subtitle {
  text-align: center;
  color: var(--text-secondary);
  margin-bottom: 32px;
}

.login-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-group label {
  font-weight: 600;
  color: var(--text-primary);
  font-size: 14px;
}

.form-group input {
  padding: 12px 16px;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  font-size: 16px;
  transition: all 0.2s;
  font-family: inherit;
}

.form-group input:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.1);
}

.form-options {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 8px;
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  font-size: 14px;
  color: var(--text-secondary);
}

.checkbox-label input {
  cursor: pointer;
}

.forgot-password {
  color: var(--primary-color);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
}

.forgot-password:hover {
  text-decoration: underline;
}

.btn-full {
  width: 100%;
  margin-top: 8px;
}

.login-footer {
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid var(--border-color);
  text-align: center;
}

.login-footer p {
  font-size: 14px;
  color: var(--text-secondary);
}

.login-footer a {
  color: var(--primary-color);
  text-decoration: none;
  font-weight: 500;
}

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

@media (max-width: 768px) {
  .hero h1 {
    font-size: 40px;
  }

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

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .nav-links {
    gap: 16px;
    font-size: 14px;
  }

  .features h2,
  .how-it-works h2,
  .cta h2 {
    font-size: 32px;
  }

  .login-box {
    padding: 32px 24px;
  }

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