/* =======================================
   GPA Calculator
======================================= */

.gpa-container{
    max-width:900px;
    margin:50px auto;
    padding:35px;
    background:#fff;
    border-radius:18px;
    box-shadow:0 10px 30px rgba(0,0,0,.08);
}

.gpa-container h1{
    margin:0;
    text-align:center;
    color:#2563eb;
    font-size:38px;
}

.gpa-container>p{
    text-align:center;
    color:#666;
    margin:15px 0 35px;
    line-height:1.7;
}

/* =======================================
   Subject List
======================================= */

#subjects{
    display:flex;
    flex-direction:column;
    gap:18px;
}

.subject-row{
    display:grid;
    grid-template-columns:2fr 1fr 1fr auto;
    gap:15px;
    align-items:center;
    padding:18px;
    background:#f8fafc;
    border:1px solid #e5e7eb;
    border-radius:14px;
    transition:.25s;
}

.subject-row:hover{
    border-color:#2563eb;
    box-shadow:0 8px 18px rgba(37,99,235,.08);
}

.subject-row input,
.subject-row select{
    width:100%;
    padding:14px;
    border:2px solid #dbe2ea;
    border-radius:10px;
    font-size:16px;
    font-family:'Kanit',sans-serif;
    transition:.25s;
    background:#fff;
}

.subject-row input:focus,
.subject-row select:focus{
    outline:none;
    border-color:#2563eb;
    box-shadow:0 0 0 3px rgba(37,99,235,.15);
}

.subject-row select{
    cursor:pointer;
}

/* =======================================
   Buttons
======================================= */

.button-group{
    display:flex;
    gap:15px;
    flex-wrap:wrap;
    justify-content:center;
    margin-top:30px;
}

.button-group button{
    flex:1;
    min-width:180px;
    padding:15px;
    border:none;
    border-radius:12px;
    cursor:pointer;
    font-size:17px;
    font-family:'Kanit',sans-serif;
    font-weight:600;
    color:#fff;
    transition:.25s;
}

#addSubject{
    background:#2563eb;
}

#calculateBtn{
    background:#16a34a;
}

#resetBtn{
    background:#ef4444;
}

#addSubject:hover{
    background:#1d4ed8;
    transform:translateY(-2px);
}

#calculateBtn:hover{
    background:#15803d;
    transform:translateY(-2px);
}

#resetBtn:hover{
    background:#dc2626;
    transform:translateY(-2px);
}

.button-group button:active{
    transform:scale(.98);
}

/* =======================================
   Delete Button
======================================= */

.delete-subject{
    width:52px;
    height:52px;
    border:none;
    border-radius:10px;
    background:#ef4444;
    color:#fff;
    cursor:pointer;
    font-size:18px;
    transition:.25s;
}

.delete-subject:hover{
    background:#dc2626;
    transform:scale(1.05);
}

/* =======================================
   Result
======================================= */

.result{
    margin-top:40px;
    padding:30px;
    background:#f8fafc;
    border-radius:16px;
    border:1px solid #e5e7eb;
}

.result h2{
    margin:0 0 25px;
    text-align:center;
    color:#2563eb;
}

.result-grid{
    display:grid;
    grid-template-columns:repeat(auto-fit,minmax(180px,1fr));
    gap:20px;
}

.result-card{
    background:#fff;
    padding:25px 20px;
    text-align:center;
    border-radius:14px;
    box-shadow:0 5px 15px rgba(0,0,0,.06);
    transition:.25s;
}

.result-card:hover{
    transform:translateY(-5px);
    box-shadow:0 10px 25px rgba(37,99,235,.12);
}

.result-card h3{
    margin:0;
    color:#666;
    font-size:18px;
    font-weight:600;
}

.result-card p{
    margin:15px 0 0;
    font-size:34px;
    font-weight:700;
    color:#2563eb;
    word-break:break-word;
}

/* =======================================
   Animation
======================================= */

.subject-row,
.result-card{
    animation:fadeUp .35s ease;
}

@keyframes fadeUp{

    from{

        opacity:0;
        transform:translateY(12px);

    }

    to{

        opacity:1;
        transform:translateY(0);

    }

}

/* =======================================
   Responsive
======================================= */

@media (max-width:768px){

    .gpa-container{

        margin:25px 15px;
        padding:25px;

    }

    .gpa-container h1{

        font-size:30px;

    }

    .subject-row{

        grid-template-columns:1fr;
        gap:12px;

    }

    .button-group{

        flex-direction:column;

    }

    .button-group button{

        width:100%;
        min-width:100%;

    }

    .delete-subject{

        width:100%;
        height:50px;

    }

    .result-grid{

        grid-template-columns:1fr;

    }

    .result-card p{

        font-size:28px;

    }

}

@media (max-width:480px){

    .gpa-container{

        padding:20px;

    }

    .gpa-container h1{

        font-size:26px;

    }

    .gpa-container>p{

        font-size:15px;

    }

    .subject-row{

        padding:15px;

    }

    .subject-row input,
    .subject-row select{

        font-size:15px;
        padding:12px;

    }

    .result{

        padding:20px;

    }

    .result-card{

        padding:20px 15px;

    }

    .result-card h3{

        font-size:16px;

    }

    .result-card p{

        font-size:24px;

    }

}