```css
/* ===========================
   Camping mit Hunden
   style.css
=========================== */

*{
    margin:0;
    padding:0;
    box-sizing:border-box;
}

html,
body{
    width:100%;
    height:100%;
}

body{

    font-family:'Montserrat',sans-serif;
    color:#ffffff;

    background-image:url("background.jpg");
    background-size:cover;
    background-position:center center;
    background-repeat:no-repeat;
    background-attachment:fixed;

    overflow:hidden;
}

/* Leichter dunkler Schleier für bessere Lesbarkeit */
.overlay{

    position:fixed;

    top:0;
    left:0;

    width:100%;
    height:100%;

    background:rgba(0,0,0,.22);

    z-index:1;

}

/* Inhalt */

.content{

    position:relative;

    z-index:2;

    width:95%;
    max-width:1200px;

    margin:auto;

    top:50%;

    transform:translateY(-50%);

    text-align:center;

}

/* Logo */

.logo{

    width:480px;
    max-width:90%;

    margin-bottom:25px;

    filter:drop-shadow(0 8px 20px rgba(0,0,0,.75));

}

/* Überschrift */

h1{

    font-family:'Oswald',sans-serif;

    font-size:72px;

    font-weight:600;

    letter-spacing:3px;

    margin-bottom:20px;

    text-shadow:

        3px 3px 12px #000,

        0 0 20px rgba(0,0,0,.8);

}

/* Untertitel */

.subtitle{

    font-size:30px;

    line-height:1.6;

    margin-bottom:45px;

    text-shadow:

        2px 2px 8px #000;

}

/* Countdown */

.countdown{

    display:flex;

    justify-content:center;

    align-items:center;

    gap:55px;

    flex-wrap:wrap;

    margin-bottom:45px;

}

.countdown .box{

    min-width:120px;

}

.countdown span{

    display:block;

    font-size:78px;

    font-weight:bold;

    text-shadow:

        3px 3px 10px #000;

}

.countdown p{

    margin-top:8px;

    font-size:20px;

    letter-spacing:2px;

}

/* E-Mail */

.mail{

    display:inline-block;

    padding:18px 40px;

    border:2px solid #d6a742;

    border-radius:40px;

    font-size:28px;

    font-weight:500;

    color:#ffffff;

    background:rgba(0,0,0,.18);

    margin-bottom:55px;

    text-shadow:2px 2px 6px #000;

}

/* Social */

h2{

    margin-bottom:20px;

    font-size:30px;

    font-weight:500;

    text-shadow:2px 2px 8px #000;

}

.social{

    display:flex;

    justify-content:center;

    gap:40px;

    flex-wrap:wrap;

}

.social a{

    display:flex;

    align-items:center;

    gap:14px;

    color:#ffffff;

    text-decoration:none;

    font-size:24px;

    font-weight:500;

    transition:.3s;

}

.social a:hover{

    transform:scale(1.08);

}

.social img{

    width:56px;

    height:56px;

}

/* Tablet */

@media(max-width:992px){

    .logo{

        width:340px;

    }

    h1{

        font-size:48px;

    }

    .subtitle{

        font-size:22px;

    }

    .countdown{

        gap:25px;

    }

    .countdown span{

        font-size:54px;

    }

    .mail{

        font-size:20px;

        padding:15px 25px;

    }

}

/* Smartphone */

@media(max-width:600px){

    body{

        overflow:auto;

    }

    .content{

        top:auto;

        transform:none;

        padding:30px 0;

    }

    .logo{

        width:240px;

    }

    h1{

        font-size:34px;

    }

    .subtitle{

        font-size:18px;

        padding:0 15px;

    }

    .countdown{

        gap:15px;

    }

    .countdown .box{

        min-width:70px;

    }

    .countdown span{

        font-size:34px;

    }

    .countdown p{

        font-size:14px;

    }

    .mail{

        font-size:16px;

        padding:12px 18px;

    }

    h2{

        font-size:22px;

    }

    .social{

        flex-direction:column;

        gap:18px;

    }

    .social a{

        justify-content:center;

        font-size:18px;

    }

}
```