/* ===== RESET Y BASE (TU CÓDIGO) ===== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

/* NUEVO: Fondo unificado EcoVolt */
body {
    font-family: 'Inter', sans-serif;
    /* Misma imagen y degradado que el menú principal */
    background-image: linear-gradient(rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.7)), url("fondo.png");
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    background-repeat: no-repeat;
    
    color: #1e293b;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ===== HEADER FIJO (AJUSTADO) ===== */
header {
    position: sticky;
    top: 0; /* Corregido de 100 a 0 */
    height: 64px;
    backdrop-filter: saturate(180%) blur(16px);
    background: rgba(0, 0, 0, 0.85); /* Fondo oscuro para que resalte el texto blanco */
    border-bottom: 1px solid #2196f3;
    display: flex;
    align-items: center;
    padding: 0 24px;
    z-index: 1000;
    box-shadow: 0 1px 4px rgb(0 0 0 / 0.3);
}

.brand {
    display: flex;
    align-items: center;
    font-weight: 800;
    font-size: clamp(1.25rem, 3vw, 1.75rem);
    color: #ffffff;
    letter-spacing: 0.05em;
    gap: 12px;
}

.header-avatar {
    width: 175px;
    height: 100px;
    object-fit: cover;
}

/* ===== BOTÓN MENÚ HAMBURGUESA ===== */
.menu-toggle {
    margin-left: auto;
    width: 40px;
    height: 32px;
    background: transparent;
    border: none;
    padding: 6px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    cursor: pointer;
}
.menu-toggle span {
    display: block;
    height: 3px;
    background: #2196f3; /* Azul EcoVolt */
    border-radius: 2px;
}

/* ===== PANEL LATERAL (SIDE-MENU) ===== */
.side-menu {
    position: fixed;
    top: 0;
    right: -280px;
    width: 280px;
    height: 100%;
    background: #121212;
    box-shadow: -2px 0 12px rgba(0,0,0,0.5);
    transition: right 0.2s ease;
    padding: 80px 24px 24px;
    z-index: 1100;
}
.side-menu.open { right: 0; }
.side-menu nav a {
    display: block;
    padding: 12px 24px;
    color: #ffffff;
    text-decoration: none;
    text-transform: uppercase;
    transition: 0.3s;
}
.side-menu nav a:hover {
    background: #2196f3;
    color: white;
}

.side-menu-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.5);
    z-index: 1000;
    opacity: 0;
    transition: 0.2s ease;
}
.side-menu-backdrop.show { opacity: 1; }

/* ===== SECCIONES DE PRODUCTO (CON TRANSPARENCIA) ===== */
section {
    background: rgba(0, 0, 0, 0.95); /* Blanco traslúcido para ver el fondo */
    padding: 40px; /* Reducido de 100px para que se vea mejor en móviles */
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
    margin: 40px auto;
    max-width: 1000px;
}
.product-text {
color: #ffffff;

}

.product-image img {
    width: 100%;
    max-width: 500px; /* Limitamos el tamaño para que no sea gigante */
    border-radius: 16px;
    box-shadow: 0 6px 14px rgba(0, 0, 0, 0.1);
    display: block;
    margin: 0 auto;
}

/* Barra de progreso */
.progress-container {
    background: #e5e7eb;
    height: 28px;
    border-radius: 16px;
    overflow: hidden;
    margin-bottom: 24px;
    border: 1px solid #ccc;
}

.progress-bar {
    width: 40%;
    height: 100%;
    background: linear-gradient(90deg, #2196f3, #64b5f6);
    color: white;
    text-align: center;
    font-weight: bold;
    line-height: 28px;
}

/* Tarjetas de etapas y características */
.stage-card, .feature-card {
    background: #ffffff;
    border: 1px solid #e5e7eb;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
    padding: 20px;
    border-radius: 16px;
    transition: transform 0.3s ease, border-color 0.3s ease;
}

.stage-card:hover, .feature-card:hover {
    transform: translateY(-5px);
    border-color: #2196f3;
}

/* ===== FOOTER ===== */
footer {
    background: rgba(0, 0, 0, 0.9);
    color: #888;
    padding: 20px 48px;
    display: flex;
    justify-content: center;
    border-top: 1px solid #2196f3;
    width: 100%;
}