* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}


body {

    font-family: Arial, sans-serif;

    background:
        linear-gradient(
            135deg,
            #eef2ff,
            #f8fafc
        );

    min-height: 100vh;

    color: #1e293b;

}


.container {

    width: 90%;

    max-width: 1100px;

    margin: auto;

    padding: 40px 0;

}


/* HEADER */

header {

    text-align: center;

    margin-bottom: 30px;

}


header h1 {

    font-size: 42px;

    margin-bottom: 10px;

}


header p {

    color: #64748b;

    font-size: 18px;

}


/* CARD */

.card {

    background: white;

    padding: 35px;

    border-radius: 20px;

    box-shadow:
        0 10px 30px
        rgba(0,0,0,0.08);

}


.card h2 {

    margin-bottom: 25px;

    text-align: center;

}


/* FORM */

.form-grid {

    display: grid;

    grid-template-columns:
        repeat(3, 1fr);

    gap: 20px;

}


.input-box {

    display: flex;

    flex-direction: column;

}


.input-box label {

    font-weight: bold;

    margin-bottom: 8px;

}


.input-box input {

    padding: 13px;

    border: 1px solid #cbd5e1;

    border-radius: 10px;

    font-size: 16px;

    outline: none;

}


.input-box input:focus {

    border-color: #4f46e5;

}


/* BUTTON */

button {

    display: block;

    width: 100%;

    margin-top: 30px;

    padding: 16px;

    border: none;

    border-radius: 12px;

    background: #4f46e5;

    color: white;

    font-size: 18px;

    font-weight: bold;

    cursor: pointer;

}


button:hover {

    background: #3730a3;

}


/* RESULT */

.result {

    margin-top: 30px;

    padding: 25px;

    text-align: center;

    border-radius: 15px;

    background: #eef2ff;

}


.result h3 {

    margin-bottom: 10px;

}


#price {

    font-size: 36px;

    font-weight: bold;

    color: #4f46e5;

}


/* ABOUT */

.about {

    margin-top: 30px;

    background: white;

    padding: 30px;

    border-radius: 20px;

    box-shadow:
        0 10px 30px
        rgba(0,0,0,0.06);

}


.about h2 {

    margin-bottom: 15px;

}


.about p {

    line-height: 1.7;

    color: #475569;

}


/* MODELS */

.models {

    display: grid;

    grid-template-columns:
        repeat(2, 1fr);

    gap: 20px;

    margin-top: 25px;

}


.models div {

    padding: 20px;

    background: #f8fafc;

    border-radius: 12px;

    text-align: center;

}


/* FOOTER */

footer {

    text-align: center;

    margin-top: 30px;

    color: #64748b;

}


/* MOBILE */

@media(max-width: 800px) {

    .form-grid {

        grid-template-columns: 1fr;

    }

    .models {

        grid-template-columns: 1fr;

    }

    header h1 {

        font-size: 30px;

    }

}