:root 
{
    --navbar_back_col:          #004687;     
    --navbar_text_col:          white;
    --navbar_link_hover:        rgb(202, 230, 255);   
    --intro_headline_col:       #ffffe9;
    --intro_text_col:           #ececec;
    --leistungen_heading:       black;
    --leistungen_subheading:    rgb(0, 76, 189);
    --leistungen_text:          black; 
    --about_heading:            white;
    --about_text:               rgb(255, 245, 231);
    --termine_heading:          black;
    --termine_text:             rgb(25, 25, 25);
}
body
{
    margin: 0;
    height: 100%;
    overscroll-behavior: none;
}
#navbar
{
    background-color: var(--navbar_back_col);
    font-family: sans-serif;
    display: flex;
    height: 45px;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    font-weight: normal;
}
#nav_links_on_the_left a
{
    margin-left: 80px;
}
#navbar a
{ 
    text-decoration: none; 
    color: var(--navbar_text_col);
} 
#navbar a:hover
{
    color: var(--navbar_link_hover);
}
#nav_text_on_the_right
{
    margin-left: auto;    
    color: var(--navbar_text_col);
    display: flex;
}
#mail_on_right
{
    width: 260px;
    margin-right: 40px;
}
#phone_on_right
{
    width: 145px;
    margin-right: 40px;
}
#intro_section
{
    background-color: #091869C4;
    /* background-image: linear-gradient(to right bottom, #0b0f32, #0b1137, #0c133c, #0d1441, #0f1546); */
}
#intro_text
{
    color: var(--intro_text_col);
    font-family: sans-serif;
    font-size: 20px;
    width: 75%;
    margin: auto;
    line-height: 1.5;
    font-weight: lighter;
}
#intro_text h2
{
    font-size: 32px;
    color: var(--intro_headline_col);
    text-align: center;
    font-weight: lighter;
}
#intro_text p
{
    width: 75%;
    margin: auto;
    text-align: justify;
    hyphens: auto;
}
#leistungen {font-family: sans-serif;}
#leistungen_background
{
    position: fixed;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    
    background-image: url("../images/ultrasound.jpg");
    filter: blur(7px);
    background-position: center;
    background-repeat: no-repeat;
    background-size: cover;
    z-index: -2;
}
#leistungen h2
{
    color: var(--leistungen_heading);
    text-align: center;
    font-size: 30px;
    margin-top: 20px;
    margin-bottom: 0px;
    font-weight: normal;
}
#leistungen_lvl1
{
    display: grid;
    grid-template-areas: 
    "a b"
    "c d";
    align-items: start;
    width: 910px;
    margin: auto;
}
.leistungen_lvl2
{
    width: 340px;
    padding: 20px;
    margin: 20px;
    background-color: rgba(255, 255, 255, 0.35);
    border-radius: 20px;
}
.leistungen_subheading
{
    color: var(--leistungen_subheading);
    font-size: 22px;
    font-weight: normal;
    margin-bottom: 5px;
}
.leistungen_subheading a {color: var(--leistungen_subheading);text-decoration: none;}
.leistungen_lvl3
{
    color: var(--leistungen_text);
    font-size: 20px;
    line-height: 1.5;
    font-weight: lighter;
}
#about_me
{
    display: flex;
    background-color: #091869C4;
    margin-top: 0px;
    padding-top: 0px;
    font-family: sans-serif;
    align-items: center;
    font-weight: lighter;
}
#profil 
{
    width: 350px;
    margin-left: 20px;
}
#about_me h2
{
    color: var(--about_heading);
    margin-top: 0px;
    padding-top: 30px;
    text-align: center;
    font-size: 30px;
    font-weight: normal;
}
#about_me p
{
    color: var(--about_text);
    font-size: 18px;
    width: 80%;
    margin: auto;
    line-height: 1.5;
    text-align: justify;
    hyphens: auto;
}
#termine {font-family: sans-serif;}
#termine_background
{
    position: absolute;
    width: 100%;
    height: 550px;
    background-image: url("../images/calendar.jpg");
    filter: blur(4px);
    background-position: center;
    background-repeat: no-repeat;
    background-size: cover;
    z-index: -1;
}
.footer 
{
    display:flex; 
    flex-wrap: wrap;
}
.footer b {font-size: 21px;}
.footer_subdiv
{
    width: 380px;
    height: 370px;
    padding-top: 10px;
    padding-bottom: 10px;
    color: var(--termine_text);
    font-size: 20px;
    font-weight: lighter;
    line-height: 1.5;
    text-align: center;
    background-color: rgba(255, 255, 255, 0.6);
    border-radius: 20px;
    margin: auto;
    margin-top: 40px;
}
.footer_subdiv img
{
    filter: invert();
    /* filter: brightness(50%) sepia(100%) saturate(10000%) hue-rotate(0deg); */
    margin-bottom: -5px;
}
.footer_subdiv button, .footer_subdiv input[type="submit"]
{
    background-image: linear-gradient(#3f9ae1, #016abf);
    border: 1px solid #0273c4;
    border-radius: 7px;
    color: #FFFFFF;
    width: 220px;
    height: 50px;
    font-size: 18px;
}
.footer_subdiv button:hover, .footer_subdiv input[type="submit"]:hover
{
    background-image: linear-gradient(#438ec8, #1265a9);
    border-color: #147ac4;
}
.footer_subdiv input[type="text"]
{
    width: 300px;
    font-size: 16px;
    border-radius: 6px;
    border-style: groove;
    border-color: #b8d6f2;
}
.footer_subdiv textarea
{
    width: 300px;
    height: 150px;
    font-size: 16px;
    font-family: sans-serif;
    resize: none;
    border-radius: 6px;
    border-style: groove;
    border-color: #b8d6f2; /*achtung auch bei main js function nach absenden */
}
#termine a
{
    text-decoration: none;
    color: blue;
}
#impressum 
{
    font-size: 20px;
    text-align: center;
    font-weight: lighter;
    color: rgb(37, 37, 37)
}
#impressum a
{
    text-decoration: none;
    color: black;
}

@media screen and (max-width: 1168px) 
{
    #nav_text_on_the_right
    {
        visibility: hidden;
        width: 0px;
        display: none;
    }
    #navbar a {padding: 0px;}
    #profil {width: 300px;}
    #intro_text {font-size: 16px;}
    #intro_text h2 {font-size: 20px;}
    #termine_background {height: 970px;}
}
@media screen and (max-width: 930px) 
{
    #nav_text_on_the_right
    {
        visibility: hidden;
        width: 0px;
        display: none;
    }
    #about_me {display: block;}
    #profil 
    {
        width: 450px;
        max-width: 100%;
        margin: auto; 
        display: block;
    }
    #leistungen_lvl1 
    {
        display: block;
        width: 420px;
    }
    #navbar a
    {
        margin-left: 10px;
        margin-right: 10px;
    }
}
@media screen and (max-width: 758px) 
{
    #termine_background {height: 1410px;}
}
@media screen and (max-width: 660px) 
{
    #name {font-size: 3.4vw;}
    #navbar a {font-size: 12px;}
    #intro_text p {width: 100%;}
}
@media screen and (max-width: 450px) 
{
    #leistungen_lvl1 {width: 360px;}
    .leistungen_lvl2 {width: 280px;}
    .leistungen_lvl3 {font-size: 16px;}
    .leistungen_subheading{font-size: 18px;}
    #intro_text h2 {font-size: 16px;}
    #intro_text {font-size: 14px;}
}
@media screen and (max-width: 400px) 
{
    #leistungen h2 {font-size: 22px;}
    #about_me p {font-size: 16px;}
    #termine h2 {font-size: 22px;}
    #termine p {font-size: 16px;}
    #impressum {font-size: 16px;}
}
@media screen and (max-width: 350px) 
{
    #navbar a {font-size: 8px;}
    #intro_text h2 {font-size: 14px;}
    #leistungen_lvl1 {width: 300px;}
    .leistungen_lvl2 {width: 230px;}
    .leistungen_lvl3 {font-size: 14px;}
    .leistungen_subheading{font-size: 15px;}
}