*{
    margin:0;
    padding:0;
    box-sizing:border-box;
    font-family:Arial,sans-serif;
}

body{
    background:#0f172a;
    color:#fff;
}

.login{
    display:flex;
    justify-content:center;
    align-items:center;
    height:100vh;
}

.login-box{
    width:380px;
    background:#1e293b;
    padding:35px;
    border-radius:10px;
}

.login-box h1{
    margin-bottom:25px;
    text-align:center;
    font-size:24px;
}

.login-box input{
    width:100%;
    padding:12px;
    margin-bottom:15px;
    border:none;
    border-radius:6px;
}

.login-box button{
    width:100%;
    padding:12px;
    border:none;
    border-radius:6px;
    cursor:pointer;
    background:#2563eb;
    color:#fff;
    font-size:15px;
}

.login-box button:hover{
    background:#1d4ed8;
}

.error{
    background:#dc2626;
    padding:10px;
    border-radius:6px;
    margin-bottom:15px;
}

.sidebar{
    position:fixed;
    left:0;
    top:0;
    width:230px;
    height:100vh;
    background:#111827;
    padding:25px;
}

.sidebar h2{
    margin-bottom:30px;
}

.sidebar a{
    display:block;
    color:#fff;
    text-decoration:none;
    padding:12px 0;
}

.sidebar a:hover{
    color:#60a5fa;
}

.content{
    margin-left:230px;
    padding:40px;
}

.modal{
    position:fixed;
    left:0;
    top:0;
    width:100%;
    height:100%;
    background:rgba(0,0,0,.55);
    display:none;
    z-index:999;
}

.modal-content{
    width:500px;
    background:#fff;
    margin:100px auto;
    padding:25px;
    border-radius:8px;
}