.selectpicker {
    position: relative;
    width: 300px;
}

.selectpicker input[type="text"] {
    font-size: 1em;
    width:6em;
}

.picker-options {
    position: absolute;
    z-index: 1000;
    top: 100%;
    left: 0;
    right: 0;

    max-height: 200px;
    margin: 2px 0 0;
    padding: 0;

    overflow-y: auto;
    background: white;
    border: 1px solid #aaa;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.15);
}

.picker-option {
    display: block;
    padding: 8px 10px;

    font: inherit;
    text-align: left;

    background: white;
    border: 0;
    cursor: pointer;
    width:98%;
    border-radius:0;
    box-shadow:0;
}

.picker-option:hover,
.picker-option.active {
    background: #e7f1ff;
}