:root {
    --naranja-oscuro: #ff6e00;
    --naranja-claro: #ffaf00;
    --azul-oscuro: #0045be;
    --azul-claro: #007ee9;
    --gris-fondo: #f4f7f9;
    --blanco: #ffffff;
    --texto: #333333;
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--gris-fondo);
    color: var(--texto);
    line-height: 1.6;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
.header {
    background: linear-gradient(135deg, var(--azul-oscuro), var(--azul-claro));
    color: var(--blanco);
    padding: 60px 0;
    text-align: center;
    border-bottom: 5px solid var(--naranja-oscuro);
}

.logo {
    max-width: 220px;
    margin-bottom: 20px;
    filter: drop-shadow(0px 4px 10px rgba(0,0,0,0.1));
}

.header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 10px;
}

.header p {
    font-size: 1.1rem;
    opacity: 0.9;
}

/* Grid de Tarjetas */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: -40px; /* Eleva las tarjetas sobre el header */
    padding-bottom: 60px;
}

.card {
    background: var(--blanco);
    border-radius: 12px;
    text-decoration: none;
    color: inherit;
    padding: 40px 30px;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    box-shadow: 0 10px 20px rgba(0,0,0,0.05);
    border-top: 4px solid transparent;
}

.card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0,0,0,0.1);
    border-top: 4px solid var(--naranja-oscuro);
}

.card-icon {
    font-size: 3rem;
    margin-bottom: 20px;
}

.card h2 {
    color: var(--azul-oscuro);
    margin-bottom: 15px;
    font-size: 1.5rem;
}

.card p {
    font-size: 0.95rem;
    color: #666;
    margin-bottom: 25px;
    flex-grow: 1;
}

.btn-link {
    background-color: var(--naranja-oscuro);
    color: var(--blanco);
    padding: 10px 25px;
    border-radius: 50px;
    font-weight: 600;
    font-size: 0.9rem;
    transition: background 0.3s ease;
}

.card:hover .btn-link {
    background-color: var(--azul-oscuro);
}

/* Tarjeta deshabilitada */
.card-disabled {
    background-color: #ebf0f3;
    cursor: default;
    opacity: 0.7;
}

.card-disabled:hover {
    transform: none;
    border-top: 4px solid transparent;
}

/* Footer */
.footer {
    text-align: center;
    padding: 40px 0;
    background: #e9ecef;
    color: #777;
    font-size: 0.9rem;
}

.footer a {
    color: var(--azul-claro);
    text-decoration: none;
}

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

/* Responsive */
@media (max-width: 768px) {
    .header h1 { font-size: 1.8rem; }
    .grid { margin-top: 20px; }
}