/* Variables de color con tema de gimnasio */
:root {
    --energy-primary: #ff4d4d;
    --energy-secondary: #ffcc00;
    --chrome-dark: #1a1a1a;
    --chrome-light: #e2e2e2;
    --power-gradient: linear-gradient(45deg, var(--energy-primary), var(--energy-secondary));
    --intense-shadow: 0 0 20px rgba(255, 77, 77, 0.5);
}

/* Efectos de energía para secciones */
.power-section {
    position: relative;
    overflow: hidden;
    padding: 4rem 0;
    background: var(--chrome-dark);
}

.power-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 30% 30%, var(--energy-primary) 0%, transparent 60%),
        radial-gradient(circle at 70% 70%, var(--energy-secondary) 0%, transparent 60%);
    opacity: 0.1;
    z-index: 1;
}

/* Efecto de pulso energético */
.power-pulse {
    animation: powerPulse 2s ease-in-out infinite;
}

@keyframes powerPulse {
    0%, 100% {
        transform: scale(1);
        box-shadow: 0 0 20px var(--energy-primary);
    }
    50% {
        transform: scale(1.05);
        box-shadow: 0 0 30px var(--energy-primary);
    }
}

/* Títulos con efecto de energía */
.power-title {
    font-size: 3rem;
    font-weight: 900;
    text-transform: uppercase;
    background: var(--power-gradient);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    text-shadow: 0 0 15px rgba(255, 77, 77, 0.3);
    position: relative;
    display: inline-block;
}

.power-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 0;
    width: 100%;
    height: 3px;
    background: var(--power-gradient);
    transform: scaleX(0);
    transform-origin: right;
    transition: transform 0.3s ease;
}

.power-title:hover::after {
    transform: scaleX(1);
    transform-origin: left;
}

/* Tarjetas de productos con efecto de energía */
.power-card {
    background: rgba(26, 26, 26, 0.9);
    border: 2px solid transparent;
    border-image: var(--power-gradient);
    border-image-slice: 1;
    padding: 2rem;
    transition: all 0.3s ease;
    position: relative;
    z-index: 2;
}

.power-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--power-gradient);
    opacity: 0;
    transition: opacity 0.3s ease;
    z-index: -1;
}

.power-card:hover {
    transform: translateY(-10px);
}

.power-card:hover::before {
    opacity: 0.1;
}

/* Botones con efecto de energía */
.power-button {
    background: var(--power-gradient);
    color: white;
    padding: 1rem 2rem;
    border: none;
    border-radius: 5px;
    font-weight: bold;
    text-transform: uppercase;
    position: relative;
    overflow: hidden;
    transition: all 0.3s ease;
    z-index: 1;
}

.power-button::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.2);
    transform: skewX(-20deg);
    transition: all 0.5s ease;
    z-index: -1;
}

.power-button:hover::before {
    left: 100%;
}

.power-button:hover {
    box-shadow: var(--intense-shadow);
}

/* Iconos con efecto de energía */
.power-icon {
    font-size: 2.5rem;
    background: var(--power-gradient);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    transition: all 0.3s ease;
}

.power-icon:hover {
    transform: scale(1.2) rotate(5deg);
    filter: drop-shadow(0 0 10px var(--energy-primary));
}

/* Efecto de número de conteo */
.power-counter {
    font-size: 3rem;
    font-weight: 900;
    color: var(--energy-primary);
    text-shadow: 0 0 10px rgba(255, 77, 77, 0.3);
    transition: all 0.3s ease;
}

.power-counter:hover {
    transform: scale(1.1);
    color: var(--energy-secondary);
}

/* Efecto de vibración para elementos destacados */
.power-shake {
    animation: powerShake 0.5s ease infinite;
}

@keyframes powerShake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}

/* Grid de características con efecto de energía */
.power-features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    padding: 2rem 0;
}

.power-feature {
    text-align: center;
    padding: 2rem;
    background: rgba(26, 26, 26, 0.8);
    border-radius: 10px;
    transition: all 0.3s ease;
}

.power-feature:hover {
    transform: translateY(-5px) scale(1.02);
    box-shadow: var(--intense-shadow);
}

/* Barra de progreso con efecto de energía */
.power-progress {
    width: 100%;
    height: 10px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 5px;
    overflow: hidden;
    position: relative;
}

.power-progress-bar {
    height: 100%;
    background: var(--power-gradient);
    border-radius: 5px;
    animation: progressLoad 2s ease-out forwards;
}

@keyframes progressLoad {
    from { width: 0; }
    to { width: var(--progress, 100%); }
}

/* Efecto de destello para elementos destacados */
.power-flash {
    animation: powerFlash 2s infinite;
}

@keyframes powerFlash {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

/* Media queries para responsividad */
@media (max-width: 768px) {
    .power-title {
        font-size: 2rem;
    }
    
    .power-features-grid {
        grid-template-columns: 1fr;
    }
    
    .power-counter {
        font-size: 2rem;
    }
}

/* Efectos de hover mejorados */
.power-hover-glow:hover {
    filter: drop-shadow(0 0 15px var(--energy-primary));
    transform: scale(1.05);
}

.power-hover-rotate:hover {
    transform: rotate(5deg) scale(1.1);
}

/* Animación de carga de página */
.power-page-load {
    animation: pageLoadEffect 1s ease-out;
}

@keyframes pageLoadEffect {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}