* {
    box-sizing: border-box;
    font-family: "Roboto", sans-serif;
}

body {
    background: #f4f6f8;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
}

strong {
    font-weight: 600;
}

.payment-card {
    position: relative;
    background: #ffffff;
    padding: 24px;
    width: 100%;
    max-width: 420px;
    border-radius: 14px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.08);
    margin: 15px;
}

.payment-card h2 {
    margin: 0 0 40px;
    text-align: center;
    font-size: 22px;
    color: #333;
    font-weight: 300;
    text-transform: uppercase;
    user-select: none;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
    margin-bottom: 16px;
}

.form-group label {
    font-size: 14px;
    color: #555;
    user-select: none;
}

input {
    width: 100%;
}

select,
input {
    font-weight: 600;
    padding: 12px 14px;
    font-size: 16px;
    border-radius: 10px;
    border: 1px solid #d0d7de;
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
}

select:focus,
input:focus {
    border-color: #4f8cff;
    box-shadow: 0 0 0 3px rgba(79, 140, 255, 0.15);
}

.op-0 {
    opacity: 0;
}

.main-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 12px;
}

.main-grid label {
    padding: 2px 10px;
    margin-bottom: -15px;
    z-index: 1;
    background: #fff;
    width: fit-content;
    margin-left: 10px;
    border-radius: 10px;
    font-size: 12px;
    text-transform: uppercase;
    font-weight: 600;
    color: rgba(0, 0, 0, 0.4);
}

.currency-grid {
    margin-top: 15px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.currency-grid label {
    text-align: center;
    font-weight: 600;
}

.info {
    margin-top: 20px;
    font-size: 12px;
    color: #888;
    line-height: 16px;
    background: rgba(0, 0, 0, 0.05);
    padding: 15px;
    border-radius: 10px;
    user-select: none;
}

.copyright {
    position: absolute;
    left: 0px;
    right: 0px;
    margin-top: 20px;
    font-size: 12px;
    color: #888;
    line-height: 16px;
    padding: 15px;
    border-radius: 10px;
    text-align: center;
    user-select: none;
}

.copyright a {
    color: #888;
    text-decoration: none;
}

.copyright a:hover {
    color: #999;
}

@media all and (max-width: 450px) {
    body {
        align-items: unset;
    }

    .copyright {
        margin-top: 0px;
    }
}