/* BASE */
body {
    margin: 0;
    font-family: 'Orbitron', 'Segoe UI', sans-serif;
    background: #0a0a0a;
    color: #fff;
    overflow-x: hidden;
}

/* ENCABEZADO */
.contenedor {
    position: sticky;
    top: 0;
    z-index: 50;
    backdrop-filter: blur(10px);
    background: rgba(10,10,10,0.85);
}

.encabezado {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 20px;
    height: 70px;
    border-bottom: 1px solid #00ffcc;
}

.encabezado__titulo {
    font-size: 1.8rem;
    font-weight: 900;
    background: linear-gradient(90deg, #00ffcc, #0ff, #0f4c29);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-shadow: 0 0 5px #00ffcc;
}

.encabezado__contorno {
    font-weight: 900;
}

.encabezado__botones {
    text-decoration: none;
    padding: 6px 12px;
    margin-left: 10px;
    border-radius: 10px;
    font-weight: 600;
    color: #00ffcc;
    border: 1px solid #00ffcc;
    transition: all 0.3s ease;
}

.encabezado__botones:hover {
    background: rgba(0,255,204,0.2);
    box-shadow: 0 0 10px #00ffcc;
}

.boton--inicio {
    background: #00ffcc;
    color: #000;
    font-weight: bold;
    box-shadow: 0 0 10px #00ffcc;
}

.boton--inicio:hover {
    background: #0ff;
    transform: scale(1.05);
}

/* HERO */
.contenido {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 40px 20px;
    background: url('/img/imaganes 2/entrenar.png') center/cover no-repeat;
    min-height: 60vh;
}

.entrenar__titulo {
    font-size: 2rem;
    font-weight: 800;
    color: #00ffcc;
    margin-bottom: 10px;
}

.entrenar--t2 {
    font-size: 2rem;
    color: #0ff;
    margin-bottom: 20px;
}

.entrenar__parrafo {
    font-size: 1rem;
    max-width: 600px;
    color: #ccc;
    line-height: 1.5;
}

/* TARJETAS RUTINA */
.contenido2 {
    padding: 40px 20px;
}

.rutina__titulo {
    font-size: 2rem;
    color: #0ff;
    text-align: center;
    margin-bottom: 30px;
}

.grid-rutinas {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

.rutina {
    background: rgba(0,0,0,0.4);
    border-radius: 15px;
    padding: 20px;
    backdrop-filter: blur(8px);
    border: 1px solid #00ffcc;
    box-shadow: 0 0 10px #00ffcc;
    transition: all 0.3s ease;
}

.rutina:hover {
    transform: translateY(-5px);
    box-shadow: 0 0 20px #00ffcc;
}

.rutina__titulo {
    font-size: 1.2rem;
    color: #0ff;
    margin-bottom: 10px;
}

.rutina__texto {
    font-size: 0.9rem;
    color: #ccc;
    white-space: pre-wrap;
}

/* PIE DE PÁGINA */
.pie {
    text-align: center;
    padding: 20px;
    background: #000;
    border-top: 1px solid #0ff;
    color: #0ff;
}

/* RESPONSIVE */
@media (max-width: 1024px) {
    .entrenar__titulo, .entrenar--t2 {
        font-size: 1.8rem;
    }
    .entrenar__parrafo {
        font-size: 0.95rem;
    }
    .rutina__titulo {
        font-size: 1.1rem;
    }
    .rutina__texto {
        font-size: 0.85rem;
    }
}

@media (max-width: 768px) {
    .encabezado {
        flex-direction: column;
        height: auto;
        padding: 15px 20px;
    }
    .encabezado__botones {
        margin: 5px 0;
        padding: 6px 10px;
    }
    .entrenar__titulo, .entrenar--t2 {
        font-size: 1.5rem;
    }
    .entrenar__parrafo {
        font-size: 0.9rem;
    }
    .rutina__titulo {
        font-size: 1rem;
    }
    .rutina__texto {
        font-size: 0.8rem;
    }
}

@media (max-width: 480px) {
    .entrenar__titulo, .entrenar--t2 {
        font-size: 1.2rem;
    }
    .entrenar__parrafo {
        font-size: 0.8rem;
    }
    .rutina__titulo {
        font-size: 0.9rem;
    }
    .rutina__texto {
        font-size: 0.75rem;
    }
}