:root { --cvb-red: #C41E3A; --cvb-red-dark: #A01830; --white: #ffffff; --gray-light: #F5F7FA; --gray-medium: #E1E8F0; --text-primary: #1A202C; --text-secondary: #4A5568; --shadow-sm: 0 2px 8px rgba(0,0,0,0.08); --shadow-md: 0 8px 16px rgba(0,0,0,0.1); --shadow-lg: 0 12px 32px rgba(0,0,0,0.12); }
* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif; color: var(--text-primary); background: var(--white); line-height: 1.6; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.navbar { background: var(--white); border-bottom: 3px solid var(--cvb-red); box-shadow: var(--shadow-sm); padding: 20px 0; }
.navbar .container { display: flex; justify-content: space-between; align-items: center; }
.navbar-brand h1 { font-size: 28px; font-weight: 700; color: var(--text-primary); }
.navbar-nav { display: flex; gap: 16px; align-items: center; }
.nav-link { color: var(--text-primary); text-decoration: none; font-weight: 500; padding: 8px 12px; border-radius: 4px; transition: all 0.3s; }
.nav-link:hover { background: rgba(196,30,58,0.1); color: var(--cvb-red); }
.btn { display: inline-flex; align-items: center; justify-content: center; padding: 12px 24px; border-radius: 6px; font-weight: 600; font-size: 14px; text-decoration: none; transition: all 0.3s; border: none; cursor: pointer; }
.btn-primary { background: var(--cvb-red); color: var(--white); }
.btn-primary:hover { background: var(--cvb-red-dark); box-shadow: var(--shadow-md); }
.btn-secondary { background: transparent; color: var(--cvb-red); border: 2px solid var(--cvb-red); }
.btn-secondary:hover { background: var(--cvb-red); color: var(--white); }
.btn-lg { padding: 16px 40px; font-size: 16px; }
.btn-sm { padding: 8px 16px; font-size: 12px; }
.hero { background: linear-gradient(135deg, var(--cvb-red) 0%, var(--cvb-red-dark) 100%); color: var(--white); padding: 100px 0; position: relative; }
.hero-secondary { padding: 60px 0; }
.hero-content { text-align: center; }
.hero h1 { font-size: 48px; font-weight: 700; margin-bottom: 16px; line-height: 1.2; }
.hero p { font-size: 20px; opacity: 0.95; margin-bottom: 40px; max-width: 600px; margin-left: auto; margin-right: auto; }
.hero-buttons { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.search-box { display: flex; gap: 8px; max-width: 500px; margin: 40px auto 0; }
.search-box input { flex: 1; padding: 14px 20px; border: none; border-radius: 6px; font-size: 15px; background: rgba(255,255,255,0.95); }
.search-box button { padding: 14px 28px; background: var(--white); color: var(--cvb-red); border: none; border-radius: 6px; cursor: pointer; }
.features { padding: 100px 0; background: var(--gray-light); }
.features h2 { text-align: center; font-size: 36px; margin-bottom: 60px; }
.features-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 32px; }
.feature-card { background: var(--white); padding: 40px 30px; border-radius: 12px; text-align: center; box-shadow: var(--shadow-sm); transition: all 0.3s; }
.feature-card:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); }
.feature-icon { font-size: 48px; margin-bottom: 20px; }
.feature-card h3 { font-size: 20px; margin-bottom: 12px; }
.feature-card p { color: var(--text-secondary); }
.courses-section { padding: 80px 0; }
.courses-section h2 { font-size: 36px; margin-bottom: 50px; }
.courses-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 32px; }
.course-card { background: var(--white); border-radius: 12px; overflow: hidden; box-shadow: var(--shadow-sm); transition: all 0.3s; border-bottom: 4px solid var(--cvb-red); }
.course-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-8px); }
.course-card h3 { font-size: 18px; margin: 20px 20px 8px; color: var(--text-primary); }
.course-org { padding: 0 20px; color: var(--text-secondary); font-size: 14px; }
.course-footer { padding: 16px 20px; border-top: 1px solid var(--gray-medium); display: flex; justify-content: space-between; align-items: center; }
.stats { background: var(--cvb-red); color: var(--white); padding: 80px 0; }
.stats .container { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 40px; text-align: center; }
.stat h3 { font-size: 48px; font-weight: 700; margin-bottom: 8px; }
.cta { background: var(--gray-light); padding: 80px 0; text-align: center; }
.cta h2 { font-size: 42px; margin-bottom: 16px; }
.cta p { font-size: 18px; color: var(--text-secondary); margin-bottom: 32px; }
.auth-section { min-height: calc(100vh - 300px); padding: 60px 0; background: var(--gray-light); }
.auth-container { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
.auth-box { background: var(--white); padding: 60px; border-radius: 12px; box-shadow: var(--shadow-lg); }
.auth-box h1 { font-size: 32px; margin-bottom: 8px; }
.auth-box p { color: var(--text-secondary); margin-bottom: 40px; }
.form-group { margin-bottom: 24px; }
.form-group label { display: block; font-weight: 600; margin-bottom: 8px; }
.form-group input { width: 100%; padding: 12px 16px; border: 2px solid var(--gray-medium); border-radius: 6px; font-size: 15px; transition: all 0.3s; font-family: inherit; }
.form-group input:focus { outline: none; border-color: var(--cvb-red); box-shadow: 0 0 0 3px rgba(196,30,58,0.1); }
.auth-footer { margin-top: 32px; text-align: center; border-top: 1px solid var(--gray-medium); padding-top: 32px; }
.auth-footer a { color: var(--cvb-red); text-decoration: none; font-weight: 600; }
.auth-info { color: var(--text-primary); }
.auth-info h2 { font-size: 32px; margin-bottom: 32px; }
.auth-info li { margin-bottom: 12px; }
.footer { background: linear-gradient(135deg, var(--cvb-red) 0%, var(--cvb-red-dark) 100%); color: var(--white); padding: 60px 0 30px; }
.footer-content { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 40px; margin-bottom: 40px; }
.footer-section h4 { font-weight: 600; margin-bottom: 16px; }
.footer-section ul { list-style: none; }
.footer-section a { color: rgba(255,255,255,0.85); text-decoration: none; transition: opacity 0.3s; }
.footer-section a:hover { opacity: 1; text-decoration: underline; }
.footer-bottom { text-align: center; padding-top: 20px; border-top: 1px solid rgba(255,255,255,0.2); color: rgba(255,255,255,0.8); }
@media (max-width: 768px) {
  .navbar .container { flex-direction: column; gap: 16px; }
  .navbar-nav { width: 100%; justify-content: center; flex-wrap: wrap; }
  .hero h1 { font-size: 32px; }
  .hero-buttons { flex-direction: column; }
  .btn-lg { width: 100%; }
  .auth-container { grid-template-columns: 1fr; gap: 40px; }
  .features-grid, .courses-grid, .stats .container { grid-template-columns: 1fr; }
}