body{
    margin: 0;
    background-image:
    linear-gradient(
    rgba(0, 0, 0, 0.6),
    rgba(0, 0, 0, 0.6)),
    url('BGSchool.png');

    background-repeat: no-repeat;
    background-size: cover;
    background-attachment: fixed;

    min-height: 100vh;

    font-family: Arial, sans-serif;
}

/* LOGIN */

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

.login-box{
    width: 500px;
    background-color: rgba(255,255,255,0.95);
    padding: 40px;
    border-radius: 20px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.3);
}

.login-box h2{
    text-align: center;
    margin-bottom: 25px;
    color: #0d6efd;
    font-weight: bold;
}

.login-box input{
    margin-bottom: 15px;
    border-radius: 10px !important;
}

/* SIDEBAR */

.sidebar{
    height: 100vh;
    width: 220px;
    background-color: #1a1d24;
    position: fixed;
    top: 0;
    left: 0;
    padding: 30px 20px;
}

.sidebar-logo{
    width: 100px;
    display: block;
    margin: 0 auto 20px auto;
}

.sidebar h4{
    font-weight: bold;
}

.sidebar a{
    display: block;
    color: white;
    text-decoration: none;
    margin: 15px 0;
    padding: 10px;
    border-radius: 8px;
    font-size: 16px;
    transition: 0.3s;
}

.sidebar a:hover{
    color: #00c3ff;
    background-color: rgba(255,255,255,0.1);
}

.sidebar .active{
    color: #00c3ff;
    font-weight: bold;
    background-color: rgba(255,255,255,0.1);
}

/* MAIN CONTENT */

.main-content{
    margin-left: 240px;
    width: calc(100% - 240px);
    color: white;
    min-height: 100vh;
    padding-bottom: 80px;
}

.notebook-button{
    background-color: #212529;
    color: white;
    padding: 12px 24px;
    display: inline-block;
    border-radius: 10px;
    margin-bottom: 15px;
    font-size: 20px;
}

.sub-text{
    color: #d6d6d6;
    margin-bottom: 20px;
}

/* CARDS */

.card{
    border-radius: 15px !important;
    border: none !important;
    box-shadow: 0 4px 12px rgba(0,0,0,0.2);
}

.card h3,
.card h4,
.card h5{
    color: #0d6efd;
    font-weight: bold;
}

.card img{
    height: 180px;
    object-fit: cover;
}

/* BUTTONS */

.btn-info{
    background-color: #00a2d8 !important;
    border: none !important;
    border-radius: 10px !important;
    padding: 10px 18px !important;
    transition: 0.3s;
}

.btn-info:hover{
    background-color: #008bb8 !important;
}

/* PROFILE */

.profile-pic{
    width: 120px;
    height: 120px;
    border-radius: 50%;
    object-fit: cover;
    border: 4px solid #00c3ff;
}

/* FOOTER */

.footer{
    background-color: rgba(0,0,0,0.7);
    margin-left: 240px;
    width: calc(100% - 240px);
    position: fixed;
    bottom: 0;
    color: white;
}

/* RESPONSIVE */

@media(max-width: 768px){

    .sidebar{
        width: 100%;
        height: auto;
        position: relative;
    }

    .main-content{
        margin-left: 0;
        width: 100%;
    }

    .footer{
        margin-left: 0;
        width: 100%;
        position: relative;
    }

    .login-box{
        width: 90%;
    }

}