/* --- Variables --- */
:root {
    --bas-primary-color: #3797b6;
    --bas-secondary-color: #333;
    --bas-light-gray: #f8f9fa;
    --bas-medium-gray: #e9ecef;
    --bas-dark-gray: #6c757d;
    --bas-white: #fff;
    --bas-border-radius: 8px;
    --bas-spacing-unit: 1rem; /* Approx 16px */
    --bas-input-height: 44px;
}

/* --- General Container --- */
.bas-container {
    margin-bottom: calc(var(--bas-spacing-unit) * 3); /* 48px */
    font-family: sans-serif; /* Choose a nice font */
}

/* --- Controls / Form --- */
.bas-controls-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); /* Responsive grid */
    gap: calc(var(--bas-spacing-unit) * 1.5); /* 24px */
    padding: calc(var(--bas-spacing-unit) * 1.5); /* 24px */
    background-color: var(--bas-light-gray);
    border: 1px solid var(--bas-medium-gray);
    border-radius: var(--bas-border-radius);
    margin-bottom: calc(var(--bas-spacing-unit) * 2); /* 32px */
    align-items: end; /* Align items to the bottom for varying label heights */
}

.bas-control-group {
    display: flex;
    flex-direction: column;
    gap: calc(var(--bas-spacing-unit) * 0.3); /* 5px */
}

.bas-controls-container label {
    color: var(--bas-secondary-color);
    font-size: 0.9rem; /* Smaller label */
    font-weight: 600;
    margin-bottom: 4px; /* Space below label */
}

.bas-controls-container input[type="text"],
.bas-controls-container select,
.bas-controls-container select#bas-organization {
    width: 100%;
    padding: 0 calc(var(--bas-spacing-unit) * 0.75); /* 12px */
    height: var(--bas-input-height);
    border: 1px solid var(--bas-medium-gray);
    border-radius: calc(var(--bas-border-radius) / 2); /* 4px */
    font-size: 1rem;
    box-sizing: border-box; /* Include padding and border in width/height */
    transition: border-color 0.2s ease-in-out, box-shadow 0.2s ease-in-out;
    background-color: var(--bas-white);
    appearance: auto; /* Ensure dropdown arrow appears */
    -webkit-appearance: auto;
    -moz-appearance: auto;
    cursor: pointer;
}

.bas-controls-container input[type="text"]:focus,
.bas-controls-container select:focus,
.bas-controls-container select#bas-organization:focus {
    border-color: var(--bas-primary-color);
    box-shadow: 0 0 0 2px rgba(55, 151, 182, 0.2);
    outline: none;
}

/* Keep native select hidden - Select2 creates its own container */
select#bas-organization.select2-hidden-accessible {
    display: none !important;
}

/* Loading spinner for organization dropdown */
.bas-organization-loader {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px calc(var(--bas-spacing-unit) * 0.75);
    height: var(--bas-input-height);
    border: 1px solid var(--bas-medium-gray);
    border-radius: calc(var(--bas-border-radius) / 2);
    background-color: var(--bas-white);
    color: var(--bas-secondary-color);
    font-size: 1rem;
}

.bas-organization-loader .spinner {
    display: inline-block;
    width: 16px;
    height: 16px;
    border: 2px solid var(--bas-light-gray);
    border-top-color: var(--bas-primary-color);
    border-radius: 50%;
    animation: bas-spinner-rotate 0.6s linear infinite;
}

@keyframes bas-spinner-rotate {
    to {
        transform: rotate(360deg);
    }
}

/* Hide jQuery UI selectmenu elements */
.bas-control-group .ui-selectmenu-button,
#bas-organization-button,
#bas-organization-menu {
    display: none !important;
}

/* Hide any jQuery UI selectmenu buttons globally for this select */
.ui-selectmenu-button[aria-owns="bas-organization-menu"],
.ui-selectmenu-menu[id*="bas-organization"] {
    display: none !important;
}

/* Style Select2 container to match form inputs */
.bas-control-group .select2-container {
    width: 100% !important;
    display: block !important;
}

/* Hide Select2 while loading */
.bas-control-group.bas-loading .select2-container {
    display: none !important;
}

.bas-control-group .select2-container .select2-selection--single {
    height: var(--bas-input-height) !important;
    border: 1px solid var(--bas-medium-gray) !important;
    border-radius: calc(var(--bas-border-radius) / 2) !important;
    background-color: var(--bas-white) !important;
    padding: 0 calc(var(--bas-spacing-unit) * 0.75);
    display: flex !important;
    align-items: center !important;
    transition: border-color 0.2s ease-in-out, box-shadow 0.2s ease-in-out;
}

.bas-control-group .select2-container .select2-selection--single .select2-selection__rendered {
    line-height: var(--bas-input-height) !important;
    padding-left: 0 !important;
    padding-right: 20px !important;
    color: var(--bas-secondary-color);
    font-size: 1rem;
}

.bas-control-group .select2-container .select2-selection--single .select2-selection__arrow {
    height: var(--bas-input-height) !important;
    right: calc(var(--bas-spacing-unit) * 0.75);
}

/* Multi-select styling */
.bas-control-group .select2-container .select2-selection--multiple {
    min-height: var(--bas-input-height) !important;
    border: 1px solid var(--bas-medium-gray) !important;
    border-radius: calc(var(--bas-border-radius) / 2) !important;
    background-color: var(--bas-white) !important;
    padding: 4px calc(var(--bas-spacing-unit) * 0.75) !important;
    transition: border-color 0.2s ease-in-out, box-shadow 0.2s ease-in-out;
}

.bas-control-group .select2-container .select2-selection--multiple .select2-selection__rendered {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
    padding: 0 !important;
}

.bas-control-group .select2-container .select2-selection--multiple .select2-selection__choice {
    background-color: var(--bas-primary-color) !important;
    border: 1px solid var(--bas-primary-color) !important;
    border-radius: 3px !important;
    color: var(--bas-white) !important;
    padding: 2px 8px !important;
    margin: 2px 0 !important;
    font-size: 0.9rem;
}

.bas-control-group .select2-container .select2-selection--multiple .select2-selection__choice__remove {
    color: var(--bas-white) !important;
    margin-right: 4px !important;
    font-weight: bold;
}

.bas-control-group .select2-container .select2-selection--multiple .select2-selection__choice__remove:hover {
    color: var(--bas-light-gray) !important;
}

.bas-control-group .select2-container .select2-search--inline {
    margin: 0;
}

.bas-control-group .select2-container .select2-search--inline .select2-search__field {
    margin: 0 !important;
    padding: 4px 0 !important;
    min-width: 150px;
    font-size: 1rem;
}

/* Focus state for Select2 */
.bas-control-group .select2-container--focus .select2-selection--single,
.bas-control-group .select2-container--open .select2-selection--single,
.bas-control-group .select2-container--focus .select2-selection--multiple,
.bas-control-group .select2-container--open .select2-selection--multiple {
    border-color: var(--bas-primary-color) !important;
    box-shadow: 0 0 0 2px rgba(55, 151, 182, 0.2) !important;
    outline: none !important;
}

/* Style Select2 dropdown */
.select2-container--default .select2-dropdown {
    border: 1px solid var(--bas-primary-color) !important;
    border-radius: calc(var(--bas-border-radius) / 2) !important;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.select2-container--default .select2-search--dropdown .select2-search__field {
    border: 1px solid var(--bas-medium-gray);
    border-radius: calc(var(--bas-border-radius) / 2);
    padding: 8px;
    font-size: 1rem;
}

.select2-container--default .select2-search--dropdown .select2-search__field:focus {
    border-color: var(--bas-primary-color);
    outline: none;
}

.select2-container--default .select2-results__option {
    padding: 8px 12px;
    font-size: 1rem;
}

.select2-container--default .select2-results__option--highlighted[aria-selected] {
    background-color: var(--bas-primary-color) !important;
    color: var(--bas-white) !important;
}

.select2-container--default .select2-results__option[aria-selected=true] {
    background-color: var(--bas-light-gray);
}

/* --- Button --- */
.bas-button-group {
    /* Makes button align correctly in grid */
    justify-self: stretch; /* Can be start, end, stretch */
}

button.button.bas-search-button {
    background-color: var(--bas-primary-color);
    color: var(--bas-white);
    font-size: 1rem;
    font-weight: 600;
    padding: 0 calc(var(--bas-spacing-unit) * 1.5); /* 24px */
    height: var(--bas-input-height);
    border: 2px solid var(--bas-primary-color);
    border-radius: calc(var(--bas-border-radius) / 2); /* 4px */
    cursor: pointer;
    transition: background-color 0.3s, color 0.3s, border-color 0.3s;
    width: 100%; /* Full width within its grid cell */
    display: inline-flex; /* Align loader and text */
    align-items: center;
    justify-content: center;
    gap: 8px;
}

button.button.bas-search-button:hover:not(:disabled) {
    background-color: var(--bas-white);
    color: var(--bas-primary-color);
    border-color: var(--bas-primary-color);
}

button.button.bas-search-button:disabled {
    background-color: var(--bas-medium-gray);
    border-color: var(--bas-medium-gray);
    color: var(--bas-dark-gray);
    cursor: not-allowed;
}

/* Simple Dot Loader */
.button-loader span {
    display: inline-block;
    width: 6px;
    height: 6px;
    background-color: currentColor; /* Inherit color */
    border-radius: 50%;
    margin: 0 2px;
    animation: blink 1.4s infinite both;
}
.button-loader span:nth-child(1) { animation-delay: 0s; }
.button-loader span:nth-child(2) { animation-delay: 0.2s; }
.button-loader span:nth-child(3) { animation-delay: 0.4s; }

@keyframes blink {
    0%, 80%, 100% { opacity: 0; }
    40% { opacity: 1; }
}

/* --- Messages & Results --- */
#bas-results-container {
    margin-top: calc(var(--bas-spacing-unit) * 2); /* 32px */
}

.bas-message {
    padding: var(--bas-spacing-unit);
    margin-bottom: var(--bas-spacing-unit);
    border-radius: calc(var(--bas-border-radius) / 2);
    text-align: center;
    font-weight: 500;
}

.bas-message-info {
    background-color: #e7f3fe; /* Light blue */
    border: 1px solid #d0eaff;
    color: #0c5460;
}

.bas-message-error {
    background-color: #f8d7da; /* Light red */
    border: 1px solid #f5c6cb;
    color: #721c24;
}

/* --- DataTables Enhancements --- */
.bas-results {
    margin-top: var(--bas-spacing-unit);
}

/* Style DataTables wrapper elements */
.dataTables_wrapper {
    /* Add some breathing room */
    margin-top: calc(var(--bas-spacing-unit) * 1.5);
}

.dataTables_length,
.dataTables_filter {
    margin-bottom: var(--bas-spacing-unit);
}

.dataTables_filter input[type="search"] {
    padding: 8px 10px;
    border: 1px solid var(--bas-medium-gray);
    border-radius: calc(var(--bas-border-radius) / 2);
    margin-left: 5px;
    transition: border-color 0.2s ease-in-out, box-shadow 0.2s ease-in-out;
}
.dataTables_filter input[type="search"]:focus {
    border-color: var(--bas-primary-color);
    box-shadow: 0 0 0 2px rgba(55, 151, 182, 0.2);
    outline: none;
}

.dataTables_length label select {
    padding: 5px 8px;
    border: 1px solid var(--bas-medium-gray);
    border-radius: calc(var(--bas-border-radius) / 2);
    margin: 0 5px;
}

#bas-alumni-table {
    width: 100% !important; /* Ensure DataTables takes full width */
    border-collapse: collapse; /* Cleaner look */
}

#bas-alumni-table thead th {
    background-color: var(--bas-secondary-color); /* Dark header */
    color: var(--bas-white);
    padding: calc(var(--bas-spacing-unit) * 0.75) var(--bas-spacing-unit); /* 12px 16px */
    text-align: left;
    font-weight: 600;
    white-space: nowrap;
}

#bas-alumni-table tbody td {
    padding: calc(var(--bas-spacing-unit) * 0.75) var(--bas-spacing-unit);
    border-bottom: 1px solid var(--bas-medium-gray);
    vertical-align: top; /* Align content nicely if it wraps */
}

#bas-alumni-table tbody tr:nth-child(even) {
    background-color: var(--bas-light-gray); /* Subtle striping */
}

#bas-alumni-table tbody tr:hover {
    background-color: var(--bas-medium-gray); /* Hover effect */
}

/* DataTables Pagination */
.dataTables_paginate .paginate_button {
    padding: 6px 12px;
    margin: 0 2px;
    border: 1px solid var(--bas-medium-gray);
    border-radius: calc(var(--bas-border-radius) / 2);
    cursor: pointer;
    background: var(--bas-white);
    color: var(--bas-secondary-color) !important; /* Override default blue */
    transition: background-color 0.2s, border-color 0.2s;
}
.dataTables_paginate .paginate_button:hover {
    background-color: var(--bas-light-gray);
    border-color: var(--bas-dark-gray);
}
.dataTables_paginate .paginate_button.current,
.dataTables_paginate .paginate_button.current:hover {
    background-color: var(--bas-primary-color);
    border-color: var(--bas-primary-color);
    color: var(--bas-white) !important; /* Override default */
    cursor: default;
}
.dataTables_paginate .paginate_button.disabled,
.dataTables_paginate .paginate_button.disabled:hover {
    background-color: var(--bas-light-gray);
    border-color: var(--bas-medium-gray);
    color: var(--bas-dark-gray) !important; /* Override default */
    cursor: not-allowed;
}

/* DataTables Responsive */
table.dataTable.dtr-inline.collapsed>tbody>tr>td.dtr-control:before,
table.dataTable.dtr-inline.collapsed>tbody>tr>th.dtr-control:before {
    background-color: var(--bas-primary-color); /* Color the responsive expand icon */
    border: 2px solid white;
    box-shadow: 0 0 3px #444;
}
table.dataTable.dtr-inline.collapsed>tbody>tr.parent>td.dtr-control:before,
table.dataTable.dtr-inline.collapsed>tbody>tr.parent>th.dtr-control:before {
    background-color: var(--bas-dark-gray); /* Color when expanded */
}

/* --- Mobile Friendliness --- */
@media (max-width: 768px) {
    .bas-controls-container {
        /* Stack controls vertically */
        grid-template-columns: 1fr; /* Single column */
        gap: var(--bas-spacing-unit); /* Reduce gap slightly */
    }

    .bas-button-group {
        /* Ensure button takes full width */
        grid-column: 1 / -1; /* Span full width if needed, though 1fr should handle it */
    }

    /* Adjust padding for smaller screens */
    .bas-controls-container {
        padding: var(--bas-spacing-unit);
    }
    #bas-alumni-table thead {
        /* Hiding thead is often handled by DataTables responsive, but can force if needed */
        /* display: none; */
    }
    #bas-alumni-table tbody td {
        /* Stack table cells if not using DataTables responsive, but DT responsive is better */
    }
    .dataTables_length,
    .dataTables_filter {
        /* Improve layout on mobile */
        float: none;
        text-align: left;
        width: 100%;
    }
    .dataTables_filter {
        margin-top: 10px;
    }
    .dataTables_paginate {
        text-align: center;
        margin-top: 15px;
    }
    .dataTables_info {
        text-align: center;
        margin-top: 10px;
    }
}