:root {
    --wtu-blue: #0057B8;
    --wtu-dark-blue: #003875;
    --wtu-light-blue: #1E90FF;
    --wtu-light-gray: #F4F6F9;
    --wtu-white: #FFFFFF;
}

body {
    background: var(--wtu-light-gray);
    color: var(--wtu-dark-blue);
    font-family: 'Segoe UI', 'Roboto', Arial, sans-serif;
}

/* Background utilities */
.bg-wtu-blue { background-color: var(--wtu-blue) !important; }
.bg-wtu-dark { background-color: var(--wtu-dark-blue) !important; }
.bg-wtu-light { background-color: var(--wtu-light-blue) !important; }

/* Text color utilities */
.text-wtu-blue { color: var(--wtu-blue) !important; }
.text-wtu-dark { color: var(--wtu-dark-blue) !important; }
.text-wtu-light { color: var(--wtu-light-blue) !important; }

/* Shadows and cards */
.shadow-soft { box-shadow: 0 4px 24px rgba(0,87,184,0.08); }

.card {
    border: none;
    border-radius: 1rem;
    transition: box-shadow 0.3s, transform 0.3s;
}
.card:hover {
    box-shadow: 0 8px 32px rgba(0,87,184,0.18);
    transform: translateY(-6px) scale(1.03);
}
.card-title { min-height: 3rem; }
.card .badge { font-size: 0.95em; }

@media (max-width: 767px) {
    .card-title { min-height: unset; }
}

/* Buttons */
.btn-wtu {
    background: var(--wtu-blue);
    color: var(--wtu-white);
    border-radius: 2rem;
    transition: background 0.2s, box-shadow 0.2s, transform 0.2s;
}
.btn-wtu:hover {
    background: var(--wtu-dark-blue);
    box-shadow: 0 4px 16px rgba(0,87,184,0.15);
    color: var(--wtu-white);
    transform: scale(1.05);
}

/* Animaciones suaves */
.fade-in {
    opacity: 0;
    transform: translateY(30px) scale(0.98);
    transition: opacity 0.8s, transform 0.8s;
}
.fade-in.visible {
    opacity: 1;
    transform: none;
}

/* Efecto overlay en hero */
.hero-overlay {
    background: linear-gradient(120deg, rgba(0,87,184,0.85) 60%, rgba(30,144,255,0.7) 100%);
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 2;
}

/* Efecto hover en enlaces footer */
footer a.text-white:hover {
    color: var(--wtu-light-blue) !important;
    text-decoration: underline;
}

/* Imagenes de tarjetas blog */
.card-img-top {
    border-top-left-radius: 1rem;
    border-top-right-radius: 1rem;
    object-fit: cover;
    height: 180px;
    transition: filter 0.3s;
}
.card:hover .card-img-top {
    filter: brightness(0.95) saturate(1.1);
}

/* Testimonios */
.card blockquote {
    font-size: 1.1rem;
    color: var(--wtu-dark-blue);
    font-style: italic;
}
.card .blockquote-footer {
    color: var(--wtu-blue);
}