.oct-monopay-calc { margin: 12px 0; }
.oct-mp {
    border: 1px solid #e6e6e6; border-radius: 10px; padding: 12px 14px; background: #fff;
    font-size: 14px; line-height: 1.3;
}
.oct-mp-head { display: flex; align-items: center; gap: 8px; margin-bottom: 8px; }
.oct-mp-logo {
    background: #000; color: #fff; font-weight: 700; border-radius: 6px;
    padding: 2px 7px; font-size: 13px; letter-spacing: .2px;
}
.oct-mp-title { font-weight: 600; color: #111; }
.oct-mp-body { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
.oct-mp-amount { color: #333; }
.oct-mp-amount b { font-size: 18px; color: #000; }
.oct-mp-parts { display: flex; gap: 6px; }
.oct-mp-part {
    border: 1px solid #d0d0d0; background: #f7f7f7; border-radius: 8px;
    min-width: 36px; padding: 5px 9px; cursor: pointer; font-weight: 600; color: #333;
    transition: all .15s ease;
}
.oct-mp-part:hover { border-color: #999; }
.oct-mp-part.active { background: #000; color: #fff; border-color: #000; }
.oct-mp-note { margin-top: 8px; color: #6b6b6b; font-size: 12px; }