:root { 
    --edf-rojo: #b30000; 
    --edf-oscuro: #1a252f; 
    --edf-gris-claro: #f8f9fa;
}

html { scroll-behavior: smooth; }
body { 
    font-family: 'Inter', sans-serif; 
    background-color: #fdfdfd; 
    color: var(--edf-oscuro);
}
h1, h2, h3, h4, h5, .navbar-brand { font-family: 'Outfit', sans-serif; }

/* Navbar Glassmorphism */
.navbar { 
    box-shadow: 0 4px 12px rgba(0,0,0,.05); 
    background: rgba(255, 255, 255, 0.95) !important;
    backdrop-filter: blur(10px);
    padding: 0.7rem 0;
    border-bottom: 3px solid var(--edf-rojo);
    transition: all 0.4s ease;
}

.navbar-scrolled {
    padding: 0.3rem 0;
    box-shadow: 0 4px 20px rgba(0,0,0,.1);
}

/* LOGO CON PRESENCIA Y SOMBRA SUTIL */
.logo-navbar {
    height: auto;
    transition: all 0.3s ease;
    filter: drop-shadow(0px 2px 4px rgba(0,0,0,0.12));
}
.logo-navbar:hover { transform: scale(1.03); }

@media (min-width: 992px) { .logo-navbar { width: 210px; } }
@media (max-width: 991px) { .logo-navbar { width: 160px; } }

/* LINKS CON SUBRAYADO ANIMADO */
.nav-link { 
    font-weight: 600; 
    color: var(--edf-oscuro) !important; 
    text-transform: uppercase; 
    font-size: 0.85rem; 
    letter-spacing: 0.8px;
    transition: 0.3s;
    position: relative;
}
.nav-link::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: 0;
    left: 50%;
    background-color: var(--edf-rojo);
    transition: all 0.3s ease;
    transform: translateX(-50%);
}
.nav-link:hover, .nav-link.active { color: var(--edf-rojo) !important; }
.nav-link:hover::after, .nav-link.active::after { width: 75%; }

.btn-edf { 
    background: var(--edf-rojo); 
    color: white !important; 
    border-radius: 8px; 
    font-weight: bold; 
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    border: none;
    padding: 10px 25px;
}
.btn-edf:hover { 
    background: #800000; 
    transform: translateY(-3px); 
    box-shadow: 0 8px 20px rgba(179,0,0,0.3); 
}

/* ANIMACIÓN PARA EL BOTÓN CTA */
@keyframes pulse-red {
    0% { box-shadow: 0 0 0 0 rgba(179, 0, 0, 0.7); }
    70% { box-shadow: 0 0 0 10px rgba(179, 0, 0, 0); }
    100% { box-shadow: 0 0 0 0 rgba(179, 0, 0, 0); }
}
.btn-pulse { animation: pulse-red 2s infinite; }

.nav-social { color: #888; font-size: 1.1rem; transition: 0.3s; margin: 0 8px; }
.nav-social:hover { color: var(--edf-rojo); transform: translateY(-3px); }

/* WHATSAPP CIRCULAR */
.whatsapp-float {
    position: fixed;
    width: 60px;
    height: 60px;
    bottom: 30px;
    right: 30px;
    background-color: #25d366;
    color: #FFF;
    border-radius: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
    z-index: 1000;
    transition: all 0.3s ease;
    text-decoration: none;
}
.whatsapp-float:hover {
    transform: scale(1.1);
    color: #FFF;
    background-color: #128c7e;
}

/* FOOTER PREMIUM */
footer { background: var(--edf-oscuro); color: #a0aab2; padding: 80px 0 40px; margin-top: 80px; }
footer h5 { color: white; margin-bottom: 25px; letter-spacing: 1px; }
footer a { color: #a0aab2; text-decoration: none; transition: 0.3s; }
footer a:hover { color: white; padding-left: 5px; }

.social-link {
    width: 48px; height: 48px; display: inline-flex; align-items: center; justify-content: center;
    border-radius: 12px; background: rgba(255,255,255,0.08); color: white; font-size: 1.3rem;
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275); margin-right: 12px;
    border: 1px solid rgba(255, 255, 255, 0.05);
}
.social-link:hover { background: var(--edf-rojo); color: white; transform: translateY(-8px) rotate(8deg); box-shadow: 0 10px 20px rgba(179, 0, 0, 0.4); }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.05); padding-top: 30px; margin-top: 50px; font-size: 0.85rem; }

/* SCROLLBAR PERSONALIZADO (Solo PC) */
::-webkit-scrollbar { width: 10px; }
::-webkit-scrollbar-track { background: #fdfdfd; }
::-webkit-scrollbar-thumb { background: #cbd5e1; border-radius: 5px; }
::-webkit-scrollbar-thumb:hover { background: var(--edf-rojo); }

/* PRELOADER Y BOTÓN SCROLL */
#preloader { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: #ffffff; z-index: 9999; display: flex; align-items: center; justify-content: center; transition: opacity 0.6s ease, visibility 0.6s ease; }
.preloader-hidden { opacity: 0; visibility: hidden; }
#btnScrollTop { display: none; position: fixed; bottom: 100px; right: 35px; z-index: 99; font-size: 24px; border: none; outline: none; background-color: var(--edf-rojo); color: white; cursor: pointer; padding: 10px 15px; border-radius: 50%; transition: all 0.3s ease; opacity: 0.8; }
#btnScrollTop:hover { background-color: #800000; opacity: 1; transform: translateY(-5px); }

/* BLOG */
.blog-card { transition: transform 0.3s ease, box-shadow 0.3s ease; }
.blog-card:hover { transform: translateY(-8px); box-shadow: 0 1rem 3rem rgba(0,0,0,0.15) !important; }