.ms-options-wrap,
.ms-options-wrap * {
    box-sizing: border-box;
    display: inline-block;
}

.ms-options-wrap > button:focus,
.ms-options-wrap > button {
    position: relative;
    text-align: left;
    background-color: #ffffff;
    border: 1px solid #d1d5db;
    border-radius: 0.375rem;
    padding: 0.5rem 2rem 0.5rem 0.75rem;
    margin-top: 0;
    font-size: 0.875rem;
    color: #1f2937;
    outline: none;
    white-space: nowrap;
    min-width: 150px;
    max-width: 300px;
    transition: all 0.15s ease-in-out;
    box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    cursor: pointer;
}

.ms-options-wrap > button:hover {
    border-color: #9ca3af;
    background-color: #f9fafb;
}

.ms-options-wrap > button:focus {
    border-color: #3b82f6;
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.ms-options-wrap > button > span {
    display: inline-block;
    text-overflow: ellipsis;
    white-space: nowrap;
    max-width: calc(100% - 1.5rem);
}

.ms-options-wrap > button[disabled] {
    background-color: #f3f4f6;
    color: #9ca3af;
    opacity: 0.6;
    cursor: not-allowed;
}

.ms-options-wrap > button:after {
    content: '';
    position: absolute;
    top: 50%;
    right: 0.75rem;
    width: 0;
    height: 0;
    border-left: 4px solid transparent;
    border-right: 4px solid transparent;
    border-top: 5px solid #6b7280;
    margin-top: -2.5px;
    transition: transform 0.15s ease-in-out;
}

.ms-options-wrap.ms-active > button:after {
    transform: rotate(180deg);
}

.ms-options-wrap.ms-has-selections > button {
    color: #1f2937;
    font-weight: 500;
}

.ms-options-wrap > .ms-options {
    position: absolute;
    width: 100%;
    min-width: 200px;
    max-width: 400px;
    margin-top: 0.25rem;
    background: #ffffff;
    z-index: 2000;
    border: 1px solid #e5e7eb;
    border-radius: 0.5rem;
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    overflow: hidden;
    visibility: hidden;
    opacity: 0;
    transform: translateY(-4px);
    transition: all 0.15s ease-in-out;
    max-height: 300px;
}

.ms-options-wrap.ms-active > .ms-options {
    visibility: visible;
    opacity: 1;
    transform: translateY(0);
}

.ms-options-wrap > .ms-options > .ms-search input {
    width: 100%;
    padding: 0.75rem;
    border: none;
    border-bottom: 1px solid #e5e7eb;
    outline: none;
    font-size: 0.875rem;
    background-color: #f9fafb;
    color: #1f2937;
    transition: all 0.15s ease-in-out;
}

.ms-options-wrap > .ms-options > .ms-search input:focus {
    background-color: #ffffff;
    border-bottom-color: #3b82f6;
}

.ms-options-wrap > .ms-options > .ms-search input::placeholder {
    color: #9ca3af;
}

.ms-options-wrap > .ms-options .ms-selectall {
    display: inline-block;
    font-size: 0.8125rem;
    font-weight: 500;
    color: #3b82f6;
    text-decoration: none;
    padding: 0.25rem 0.5rem;
    border-radius: 0.25rem;
    transition: all 0.15s ease-in-out;
}

.ms-options-wrap > .ms-options .ms-selectall:hover {
    background-color: #eff6ff;
    color: #2563eb;
    text-decoration: none;
}

.ms-options-wrap > .ms-options > .ms-selectall.global {
    margin: 0.5rem;
    display: inline-block;
}

.ms-options-wrap > .ms-options > ul,
.ms-options-wrap > .ms-options > ul > li.optgroup ul {
    list-style-type: none;
    padding: 0;
    margin: 0;
    overflow-y: auto;
    max-height: 300px;
}

.ms-options-wrap > .ms-options > ul li.ms-hidden {
    display: none;
}

.ms-options-wrap > .ms-options > ul > li.optgroup {
    padding: 0.75rem 0.5rem 0.5rem 0.5rem;
}

.ms-options-wrap > .ms-options > ul > li.optgroup + li.optgroup {
    border-top: 1px solid #e5e7eb;
}

.ms-options-wrap > .ms-options > ul > li.optgroup .label {
    display: block;
    padding: 0 0 0.5rem 0;
    font-weight: 600;
    font-size: 0.8125rem;
    color: #374151;
    text-transform: uppercase;
    letter-spacing: 0.025em;
}

.ms-options-wrap > .ms-options > ul label {
    position: relative;
    display: flex;
    align-items: center;
    width: 100%;
    padding: 0.5rem 0.75rem;
    margin: 0;
    border-radius: 0.25rem;
    font-size: 0.875rem;
    color: #1f2937;
    cursor: pointer;
    transition: all 0.15s ease-in-out;
    border: 1px solid transparent;
}

.ms-options-wrap > .ms-options.checkbox-autofit > ul label,
.ms-options-wrap > .ms-options.hide-checkbox > ul label {
    padding: 0.5rem 0.75rem;
}

.ms-options-wrap > .ms-options > ul label.focused,
.ms-options-wrap > .ms-options > ul label:hover {
    background-color: #f3f4f6;
    color: #1f2937;
}

.ms-options-wrap > .ms-options > ul li.selected label {
    background-color: #eff6ff;
    color: #1d4ed8;
    font-weight: 500;
}

.ms-options-wrap > .ms-options > ul input[type="checkbox"] {
    margin: 0 0.5rem 0 0;
    width: 1rem;
    height: 1rem;
    color: #3b82f6;
    background-color: #ffffff;
    border: 1px solid #d1d5db;
    border-radius: 0.25rem;
    flex-shrink: 0;
    position: relative;
    top: 0;
    left: 0;
}

.ms-options-wrap > .ms-options > ul input[type="checkbox"]:checked {
    background-color: #3b82f6;
    border-color: #3b82f6;
}

.ms-options-wrap > .ms-options.hide-checkbox > ul input[type="checkbox"] {
    position: absolute !important;
    height: 1px;
    width: 1px;
    overflow: hidden;
    clip: rect(1px 1px 1px 1px);
    clip: rect(1px, 1px, 1px, 1px);
}

/* Custom scrollbar for webkit browsers */
.ms-options-wrap > .ms-options > ul::-webkit-scrollbar {
    width: 6px;
}

.ms-options-wrap > .ms-options > ul::-webkit-scrollbar-track {
    background: #f1f5f9;
    border-radius: 3px;
}

.ms-options-wrap > .ms-options > ul::-webkit-scrollbar-thumb {
    background: #cbd5e1;
    border-radius: 3px;
}

.ms-options-wrap > .ms-options > ul::-webkit-scrollbar-thumb:hover {
    background: #94a3b8;
}

/* Animation for dropdown appearance */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(-8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.ms-options-wrap.ms-active > .ms-options {
    animation: fadeInUp 0.15s ease-out;
}

/* Responsive adjustments */
@media (max-width: 640px) {
    .ms-options-wrap > button {
        min-width: 120px;
        max-width: 200px;
    }
    
    .ms-options-wrap > .ms-options {
        min-width: 180px;
        max-width: 280px;
    }
}