@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@700;800&family=Open+Sans:wght@400;600;700&display=swap');

:root { 
    --primary: #002A54; /* Azul Marino B2B */
    --secondary: #0F4C5C; /* Teal / Acento Tecnológico */
    --accent: #F2A900; /* Oro Académico */
    --bg: #f8f9fa; 
    --text: #333; 
}

body, html { margin: 0; padding: 0; font-family: 'Open Sans', sans-serif; background-color: var(--bg); color: var(--text); overflow-x: hidden; scroll-behavior: smooth; }
h1, h2, h3, .brand { font-family: 'Montserrat', sans-serif; }

/* Navegación y Logo */
.navbar { background: white; padding: 15px 5%; display: flex; justify-content: space-between; align-items: center; box-shadow: 0 2px 10px rgba(0,0,0,0.05); position: sticky; top: 0; z-index: 1000; }
.logo-container { display: flex; align-items: center; gap: 10px; text-decoration: none; }
.logo-container img { max-height: 40px; width: auto; } /* Placeholder para el logo */
.navbar .brand { font-size: 24px; font-weight: 800; color: var(--primary); letter-spacing: -0.5px; }
.nav-links a { text-decoration: none; color: #555; margin-left: 25px; font-weight: 600; font-size: 14px; transition: 0.3s; }
.nav-links a:hover { color: var(--accent); }
.nav-links .btn-login { background: var(--primary); color: white; padding: 10px 20px; border-radius: 5px; }
.nav-links .btn-login:hover { background: var(--secondary); }

/* Hero Section */
.hero { background: linear-gradient(135deg, var(--primary) 0%, #001122 100%); color: white; padding: 100px 5%; text-align: center; }
.hero h1 { font-size: 3.5rem; margin: 0 0 20px 0; font-weight: 800; line-height: 1.2; }
.hero h1 span { color: var(--accent); }
.hero p { font-size: 1.2rem; max-width: 700px; margin: 0 auto 35px auto; color: #e2e8f0; line-height: 1.6; }
.hero .btn-cta { display: inline-block; background: var(--accent); color: #002A54; padding: 15px 35px; font-size: 1.1rem; font-weight: 700; text-decoration: none; border-radius: 5px; transition: 0.3s; }
.hero .btn-cta:hover { transform: translateY(-3px); box-shadow: 0 10px 20px rgba(242, 169, 0, 0.3); }

/* Secciones Globales */
.section { padding: 80px 5%; max-width: 1200px; margin: 0 auto; text-align: center; }
.section h2 { font-size: 2.5rem; color: var(--primary); margin-bottom: 20px; }
.section > p { color: #666; margin-bottom: 50px; font-size: 1.1rem; max-width: 700px; margin-left: auto; margin-right: auto; }

/* Features */
.grid-features { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 30px; }
.feature-card { background: white; padding: 40px 30px; border-radius: 10px; box-shadow: 0 5px 15px rgba(0,0,0,0.05); transition: 0.3s; border-bottom: 4px solid transparent; }
.feature-card:hover { transform: translateY(-10px); border-bottom-color: var(--accent); }
.feature-card .icon { font-size: 40px; margin-bottom: 20px; display: block; }
.feature-card h3 { font-size: 1.3rem; color: var(--primary); margin-top: 0; }
.feature-card p { color: #666; line-height: 1.6; font-size: 0.95rem; }

/* Pricing */
.grid-pricing { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 30px; max-width: 900px; margin: 0 auto; }
.price-card { border: 1px solid #dee2e6; border-radius: 10px; padding: 40px; background: white; }
.price-card.featured { background: var(--primary); color: white; transform: scale(1.05); box-shadow: 0 15px 30px rgba(0,42,84,0.2); border: none; }
.price-card.featured p { color: #ccc; }
.price-card h3 { font-size: 1.5rem; margin-top: 0; }
.price-card .price { font-size: 3.5rem; font-weight: 800; margin: 20px 0; font-family: 'Montserrat', sans-serif; }
.price-card.featured .price { color: var(--accent); }
.price-card .price span { font-size: 1.1rem; font-weight: 400; color: #888; }
.price-card ul { list-style: none; padding: 0; margin: 0 0 30px 0; text-align: left; }
.price-card ul li { padding: 12px 0; border-bottom: 1px solid rgba(0,0,0,0.1); }
.price-card.featured ul li { border-bottom-color: rgba(255,255,255,0.1); }

/* Portal de Acceso Estudiantil */
.access-portal { padding: 80px 5%; background: var(--bg); display: flex; justify-content: center; }
.login-container { background: white; padding: 40px; border-radius: 8px; box-shadow: 0 15px 35px rgba(0,0,0,0.1); width: 100%; max-width: 500px; border-top: 6px solid var(--accent); }
.login-container h2 { text-align: center; color: var(--primary); margin-top: 0; }
.form-group { margin-bottom: 20px; text-align: left; }
.form-group label { display: block; margin-bottom: 8px; font-weight: 600; color: #495057; font-size: 14px; }
input[type="text"], input[type="email"], textarea { width: 100%; padding: 14px; border: 1px solid #ced4da; border-radius: 4px; box-sizing: border-box; font-size: 15px; font-family: 'Open Sans', sans-serif; background: #fafafa; transition: 0.3s; }
input:focus, textarea:focus { border-color: var(--secondary); outline: none; background: white; box-shadow: 0 0 0 3px rgba(15, 76, 92, 0.1); }
.btn-submit { width: 100%; padding: 16px; background-color: var(--primary); color: white; border: none; border-radius: 4px; font-size: 16px; cursor: pointer; font-weight: 700; transition: 0.3s; font-family: 'Montserrat', sans-serif; }
.btn-submit:hover { background-color: var(--secondary); }
.alerta { background-color: #f8d7da; color: #721c24; padding: 15px; border-radius: 4px; margin-bottom: 20px; font-size: 14px; font-weight: 600; }

/* Contacto */
.contact-section { background: white; }
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; max-width: 1000px; margin: 0 auto; text-align: left; }
.contact-info h3 { color: var(--primary); margin-top: 0; }
.contact-info p { color: #555; line-height: 1.6; }
.contact-info ul { list-style: none; padding: 0; margin-top: 20px; }
.contact-info ul li { margin-bottom: 15px; color: #333; font-weight: 600; }
textarea { resize: vertical; min-height: 120px; }

/* Footer */
footer { background: #001122; color: #888; text-align: center; padding: 30px 5%; font-size: 14px; border-top: 2px solid var(--accent); }

@media (max-width: 768px) {
    .hero h1 { font-size: 2.2rem; }
    .nav-links { display: none; }
    .price-card.featured { transform: scale(1); }
    .contact-grid { grid-template-columns: 1fr; }
}