/* ==========================================
   SIGNO ENERGY - ESTILOS PRINCIPALES
   ========================================== */

/* Tarjetas de tarifas */
.tariff-card {
    transition: all 0.2s ease;
    border: 1px solid #E5E7EB;
}

.tariff-card:hover {
    box-shadow: 0 4px 12px -2px rgba(24, 40, 99, 0.12);
    border-color: #4BC8B8;
}

.card-winter {
    border: 1px solid #93C5FD;
}

.card-winter:hover {
    border-color: #60A5FA;
}

/* Widget & FAQ */
details > summary {
    list-style: none;
}

details > summary::-webkit-details-marker {
    display: none;
}

details[open] summary ~ * {
    animation: sweep .3s ease-in-out;
}

@keyframes sweep {
    0% {
        opacity: 0;
        transform: translateY(-10px);
    }
    100% {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Semáforo energético */
.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    opacity: 0.3;
    transition: all 0.3s;
}

.dot.active {
    opacity: 1;
    transform: scale(1.3);
    box-shadow: 0 0 12px currentColor;
}

/* Blog cards */
.blog-card {
    transition: all 0.3s ease;
}

.blog-card:hover {
    transform: translateY(-4px);
}

.blog-card img {
    transition: transform 0.3s ease;
}

.blog-card:hover img {
    transform: scale(1.03);
}

/* Spotlight effect */
#home {
    --mouse-x: 50%;
    --mouse-y: 50%;
}

.spotlight-glow {
    background: radial-gradient(600px circle at var(--mouse-x) var(--mouse-y), rgba(75, 200, 184, 0.15), transparent 40%);
    position: absolute;
    inset: 0;
    z-index: 2;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.3s ease;
}

#home:hover .spotlight-glow {
    opacity: 1;
}

/* Corporate patterns */
.corporate-lines {
    background-image:
        linear-gradient(90deg, rgba(24, 40, 99, 0.03) 1px, transparent 1px),
        linear-gradient(rgba(24, 40, 99, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
}

/* Scroll suave */
html {
    scroll-behavior: smooth;
}

/* Disclaimer IVA */
#disclaimer-iva {
    transition: opacity 0.3s ease;
}

/* Optimizaciones móvil */
@media (max-width: 640px) {
    .tariff-card {
        padding: 1rem;
    }
    .blog-card img {
        height: 200px;
    }
}

/* Lazy loading placeholder */
img[loading="lazy"] {
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
}

@keyframes shimmer {
    0% {
        background-position: -200% 0;
    }
    100% {
        background-position: 200% 0;
    }
}