:root{
    --primary:#2563eb;
    --primary-dark:#1d4ed8;
    --dark:#0f172a;
    --text:#64748b;
    --bg:#f8fafc;
    --white:#ffffff;
}

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

body{
    background:var(--bg);
}

.container{
    min-height:100vh;
    display:flex;
}

/* LEFT SIDE */

.left-panel{
    flex:1;
    background:
    linear-gradient(
    rgba(37,99,235,.8),
    rgba(30,64,175,.85)),
    url("https://images.unsplash.com/photo-1523050854058-8df90110c9f1?w=1500");
    background-size:cover;
    background-position:center;
    position:relative;
}

.overlay{
    width:100%;
    height:100%;
    display:flex;
    justify-content:center;
    align-items:center;
    padding:40px;
}

.brand{
    color:white;
    text-align:center;
    max-width:500px;
}

.visible{
    visibility: visible;
}

.loader{
    width:16px;
    height:16px;
    border:3px solid rgba(255,255,255,.3);
    border-top:3px solid white;
    border-radius:50%;
    animation:spin 1s linear infinite;
    display:none;
}

.input-box select{
    width:100%;
    border:none;
    outline:none;
    background:transparent;
    font-size:15px;
    padding:10px 5px;
    color:#333;
    appearance:none;
}

.input-box select option{
    color:#333;
}

.loader.show{
    display:block;
}

@keyframes spin{
    0%{
        transform:rotate(0deg);
    }
    100%{
        transform:rotate(360deg);
    }
}

.message-box{
    background-color: rgb(250, 61, 61); 
    height: 30px;
    margin-block-start: 10px;
    text-align: center; 
    padding-top: 3px; 
    border-radius: 5px; 
    color: white;
    opacity: 0;
    visibility: visible;
    transform: translateY(-20px);
    transition: all .3s ease;
}


.message-box.show{
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.message-box.success{
    background: #16a34a;
}

.message-box.error{
    background: #dc2626;
}


.brand i{
    font-size:70px;
    margin-bottom:20px;
}

.brand h1{
    font-size:48px;
    margin-bottom:15px;
}

.brand p{
    font-size:18px;
    line-height:1.7;
}

/* RIGHT SIDE */

.right-panel{
    flex:1;
    display:flex;
    justify-content:center;
    align-items:center;
    padding:30px;
}

.login-card{
    width:100%;
    max-width:450px;
    background:white;
    padding:40px;
    border-radius:25px;
    box-shadow:0 15px 40px rgba(0,0,0,.08);
}

.login-card h2{
    font-size:32px;
    color:var(--dark);
    margin-bottom:10px;
}

.subtitle{
    color:var(--text);
    margin-bottom:30px;
}

.input-group{
    margin-bottom:20px;
}

.input-group label{
    display:block;
    margin-bottom:8px;
    color:var(--dark);
    font-weight:600;
}

.input-box{
    display:flex;
    align-items:center;
    background:#f1f5f9;
    border-radius:12px;
    padding:0 15px;
}

.input-box i{
    color:#94a3b8;
}

.input-box input{
    width:100%;
    border:none;
    outline:none;
    background:transparent;
    padding:16px 12px;
    font-size:15px;
}

.options{
    display:flex;
    justify-content:space-between;
    align-items:center;
    margin-bottom:25px;
    font-size:14px;
}

.options a{
    text-decoration:none;
    color:var(--primary);
    font-weight:600;
}

.remember{
    display:flex;
    align-items:center;
    gap:8px;
    color:var(--text);
}

.login-btn{
    width:100%;
    padding:16px;
    border:none;
    border-radius:12px;
    background:var(--primary);
    color:white;
    font-size:16px;
    font-weight:600;
    cursor:pointer;
    transition:.3s;
}

.login-btn:hover{
    background:var(--primary-dark);
    transform:translateY(-2px);
}

/* MOBILE */

@media(max-width:900px){

    .container{
        flex-direction:column;
    }

    .left-panel{
        min-height:300px;
    }

    .brand h1{
        font-size:36px;
    }

    .brand p{
        font-size:16px;
    }

    .login-card{
        margin-top:-50px;
        position:relative;
        z-index:2;
    }

}

@media(max-width:500px){

    .login-card{
        padding:25px;
        border-radius:20px;
    }

    .login-card h2{
        font-size:26px;
    }

    .options{
        flex-direction:column;
        align-items:flex-start;
        gap:10px;
    }

}