/* --- ESTILO MODERNO BIOS SANTE --- */
* { box-sizing: border-box; }
body { 
    font-family: 'Poppins', sans-serif; 
    margin: 0; 
    color: #333; 
    line-height: 1.6;
    background-color: #f9fbfd; /* Fondo muy suave, casi blanco */
}

/* Header con más profundidad */
header { 
    background: #005A9C; /* Azul médico profundo */
    color: white; 
    padding: 20px 5%; 
    display: flex; 
    justify-content: space-between; 
    align-items: center;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.logo { font-size: 1.8rem; font-weight: 600; letter-spacing: 1px; }

nav a { 
    color: white; 
    margin-left: 25px; 
    text-decoration: none; 
    font-weight: 300;
    transition: color 0.3s ease; /* Efecto de movimiento suave */
}

nav a:hover { color: #00A896; } /* Color turquesa médico al pasar el mouse */

/* Main con aire (espacio) */
main { padding: 60px 5%; max-width: 1000px; margin: auto; }

/* Tarjetas con sombras suaves (Efecto profesional) */
.card { 
    background: white; 
    padding: 2rem; 
    border-radius: 12px; 
    box-shadow: 0 10px 20px rgba(0,0,0,0.05);
    transition: transform 0.3s ease; /* Movimiento al pasar el mouse */
}

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

/* Botones y Acciones */
.btn { 
    background: #00A896; 
    color: white; 
    padding: 12px 30px; 
    border-radius: 50px; 
    text-decoration: none; 
    font-weight: 600;
    transition: background 0.3s ease;
}

.btn:hover { background: #008779; }

/* Botón flotante WhatsApp (Mejorado) */
.whatsapp-btn { 
    position: fixed; bottom: 30px; right: 30px; 
    background-color: #25d366; color: white; padding: 15px 25px; 
    border-radius: 50px; text-decoration: none; font-weight: bold; 
    box-shadow: 0 5px 15px rgba(37, 211, 102, 0.4); 
    z-index: 1000;
    transition: transform 0.3s ease;
}
.whatsapp-btn:hover { transform: scale(1.1); }

footer { background: #1a1a1a; color: white; text-align: center; padding: 30px; margin-top: 50px; font-size: 0.9rem; }