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

body{
    font-family:Arial, Helvetica, sans-serif;
    background:#f5f6f8;
    color:#333;
    overflow-x:hidden;
}

/* NAV */
nav{
    background:#fff;
    padding:20px 100px;
    border-bottom:1px solid #ddd;
}

nav a{
    text-decoration:none;
    color:#333;
    margin-right:20px;
    font-weight:bold;
}

/* DESKTOP LAYOUT */
.container{
    margin:60px auto;
    max-width:1400px;
    display:flex;
    gap:40px;
    align-items:flex-start;
}

.left{
    width:30%;
    min-width:280px;
}

.right{
    width:70%;
}

/* CARDS */
.card{
    background:#fff;
    border-radius:10px;
    padding:20px;
    box-shadow:0 2px 8px rgba(0,0,0,0.08);
    margin-bottom:20px;
}

/* FORM */
label{
    display:block;
    margin:10px 0 5px;
}

input,
select{
    width:100%;
    padding:10px;
    border:1px solid #ccc;
    border-radius:5px;
}

/* BUTTON */
button{
    margin-top:20px;
    width:100%;
    padding:12px;
    border:none;
    border-radius:5px;
    background:#2f6fed;
    color:#fff;
}

/* LIST */
.list-item{
    display:flex;
    justify-content:space-between;
    padding:8px 0;
    border-bottom:1px solid #eee;
    gap:10px;
}

/* COLORS */
.green{ color:#0a8a2a; font-weight:bold; }
.red{ color:#c30000; font-weight:bold; }
.orange{ color:#d67d00; font-weight:bold; }
.blue{ color:#0066cc; font-weight:bold; }

/* SUMMARY */
.summary{
    margin-top:15px;
    padding:12px 0;
    border-top:2px solid #ddd;
    border-bottom:2px solid #ddd;
}

.big-balance{
    font-size:32px;
    font-weight:bold;
    margin-top:20px;
}

/* DIVIDER */
.section-divider{
    height:2px;
    background:#e0e0e0;
    margin:20px 0;
}

/* =========================
   MOBILE FIX (WICHTIG)
========================= */
@media (max-width: 900px){

    nav{
        padding:15px 20px;
    }

    .container{
        flex-direction:column;
        margin:20px;
        gap:20px;
    }

    .left,
    .right{
        width:100%;
        min-width:unset;
    }

    .card{
        padding:15px;
    }

    .list-item{
        flex-direction:column;
        align-items:flex-start;
    }

    .big-balance{
        font-size:26px;
        text-align:center;
    }

    input,
    select,
    button{
        font-size:16px;
    }
}