html,
body{
    margin:0;
    padding:0;
    width:100%;
    height:100%;
    overflow:hidden;
    font-family:Arial, Helvetica, sans-serif;
    background:#f5f7fa;
}

*{
    box-sizing:border-box;
}

.layout{

    display:flex;

    width:100vw;
    height:100vh;

}

#sidebar{

    width:240px;
    flex-shrink:0;

    background:#1f2937;
    color:white;

    display:flex;
    flex-direction:column;

}

.logo-switcher{

    display:flex;

    padding:16px;
    gap:8px;

    border-bottom:1px solid rgba(255,255,255,.15);

}

.logo-switcher-btn{

    flex:1;

    padding:10px;

    border:none;
    border-radius:8px;

    background:transparent;
    color:rgba(255,255,255,.6);

    font-size:16px;
    font-weight:bold;

    cursor:pointer;

}

.logo-switcher-btn:hover{

    background:#374151;

}

.logo-switcher-btn.active{

    background:#2563eb;
    color:white;

}

#sidebar nav{

    display:flex;
    flex-direction:column;

    padding:15px;

    gap:8px;

    flex:1;
    min-height:0;
    overflow-y:auto;

    scrollbar-width:thin;
    scrollbar-color:rgba(255,255,255,.3) transparent;

}

#sidebar nav::-webkit-scrollbar{

    width:6px;

}

#sidebar nav::-webkit-scrollbar-track{

    background:transparent;

}

#sidebar nav::-webkit-scrollbar-thumb{

    background:rgba(255,255,255,.3);

    border-radius:999px;

}

#sidebar button{

    background:none;
    border:none;

    color:white;

    text-align:left;

    padding:12px 16px;

    border-radius:8px;

    cursor:pointer;

    font-size:15px;

}

#sidebar button:hover{

    background:#374151;

}

.nav-dropdown-toggle{

    width:100%;

    display:flex;

    align-items:center;

    justify-content:space-between;

}

.nav-dropdown-arrow{

    transition:.2s;

}

.nav-dropdown.open .nav-dropdown-arrow{

    transform:rotate(180deg);

}

.nav-dropdown-menu{

    display:none;

    flex-direction:column;

    gap:8px;

    padding:8px 0 0 14px;

}

.nav-dropdown.open .nav-dropdown-menu{

    display:flex;

}

.nav-dropdown-menu button{

    font-size:14px;

}

.content{

    flex:1;

    min-width:0;

    display:flex;

    flex-direction:column;

    overflow:hidden;

}

header{

    height:70px;

    flex-shrink:0;

    background:white;

    border-bottom:1px solid #ddd;

    display:flex;

    align-items:center;

    justify-content:space-between;

    padding:0 25px;

}

header input{

    width:300px;

    padding:10px 14px;

    border:1px solid #ddd;

    border-radius:8px;

}

main{

    flex:1;

    overflow:auto;

    padding:25px;

}

.dragging{

    opacity:.5;

}