/* Checkbox ôm vừa khít trong khung ảnh */
.image-thumb {
  position: relative;
  overflow: hidden; /* tránh checkbox tràn ra ngoài ảnh */
}
.img-thumbnail {
width: 60px;
height: 60px;
}

.btn-outline,
.btn-outline-secondary{
    border: 0 !important;
}

/* Tùy biến checkbox để kích thước nhỏ gọn, ôm sát ảnh và đồng nhất trên mọi trình duyệt */
.image-checkbox.form-check-input {
  position: absolute;
  top: 8px;
  left: 8px;
  z-index: 4;

  /* bỏ style mặc định của trình duyệt/Bootstrap */
  -webkit-appearance: none !important;
  appearance: none !important;
  background-image: none !important;
  box-shadow: none !important;
  outline: none !important;
  margin: 0;
  padding: 0;
  line-height: 1;

  /* kích thước và viền */
  width: 20px;
  height: 20px;
  border: 2px solid #ffffff;
  border-radius: 4px;
  background-color: rgba(0, 0, 0, 0.25);
  display: inline-block;
}

.image-checkbox.form-check-input:checked {
  background-color: var(--primary) !important;
  border-color: var(--primary) !important;
  /* icon tích nhỏ, căn giữa */
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath fill='white' d='M6.173 12.727L2.1 8.654l1.414-1.414 2.659 2.659 6.314-6.314 1.414 1.414z'/%3E%3C/svg%3E") !important;
  background-repeat: no-repeat !important;
  background-position: center !important;
  background-size: 12px 12px !important;
}

.image-checkbox.form-check-input:focus {
  box-shadow: 0 0 0 0.2rem rgba(13, 110, 253, 0.25) !important;
}

[data-theme="dark"] .image-checkbox.form-check-input {
  border-color: var(--border);
  background-color: rgba(0, 0, 0, 0.35);
}
:root {
    --primary: #2563eb;
    --primary-light: #3b82f6;
    --secondary: #64748b;
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    --info: #06b6d4;

    /* Light theme */
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    --border: #e2e8f0;
    --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
}

[data-theme="dark"] {
    /* Nền tối dịu, tương phản tốt hơn */
    --bg-primary: #0b1220;
    --bg-secondary: #070d19;
    --bg-tertiary: #111a2b;
    /* Màu chữ sáng nhưng không gắt */
    --text-primary: #e6edf7;
    --text-secondary: #c2d0e4;
    --text-muted: #93a2b8;
    /* Đường viền mềm hơn */
    --border: #1f2a3a;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-secondary);
    color: var(--text-primary);
    line-height: 1.6;
    transition: all 0.3s ease;
}

/* Header */
.navbar {
    background: var(--bg-primary) !important;
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary) !important;
    text-decoration: none;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

/* Theme Toggle */
.theme-toggle {
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s ease;
    color: var(--text-primary);
}

.theme-toggle:hover {
    background: var(--primary);
    color: white;
    transform: scale(1.05);
}

/* Buttons */
.btn {
    font-weight: 500;
    border-radius: 8px;
    padding: 0.5rem 1rem;
    border: none;
    cursor: pointer;
    transition: all 0.2s ease;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
}

.btn-primary {
    background: var(--primary);
    color: white;
}

.btn-primary:hover {
    background: var(--primary-light);
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
    color: white;
}

.btn-outline,
.btn-outline-secondary {
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--border);
}

.btn-outline:hover,
.btn-outline-secondary:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.btn-success {
    background: var(--success);
    color: white;
}

.btn-success:hover {
    background: #059669;
    color: white;
}

.btn-danger {
    background: var(--danger);
    color: white;
}

.btn-danger:hover {
    background: #dc2626;
    color: white;
}

.btn-info {
    background: var(--info);
    color: white;
}

.btn-info:hover {
    background: #0891b2;
    color: white;
}

.btn-lg {
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
}

.btn-sm {
    padding: 0.375rem 0.75rem;
    font-size: 0.875rem;
}

/* Cards */
.card {
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: 12px;
    box-shadow: var(--shadow);
    margin-bottom: 2rem;
    transition: all 0.3s ease;
}

.card:hover {
    box-shadow: var(--shadow-lg);
}

.card-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border);
    background: var(--bg-tertiary);
}

.card-body {
    padding: 2rem;
}

.card-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.card-text {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.card-img-top {
    object-fit: cover;
    height: 350px;
}
/* Tabs */
.nav-tabs {
    border: none;
    display: flex;
    /* gap: 0.25rem; */
    flex-wrap: wrap;
}

.nav-link {
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    border: 1px solid var(--border);
    border-radius: 0 !important;
    padding: 0.75rem 1rem;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: 5px;
}

.nav-link:hover {
    background: var(--primary);
    color: white;
    transform: translateY(-1px);
}

.nav-link.active {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

/* Dark mode refinements */
[data-theme="dark"] .navbar {
    box-shadow: none;
    border-bottom-color: var(--border);
}

[data-theme="dark"] .card {
    box-shadow: none;
    border-color: var(--border);
}

[data-theme="dark"] .card-footer {
    background: var(--bg-tertiary);
    border-top-color: var(--border);
}

[data-theme="dark"] .card-header {
    background: var(--bg-tertiary);
    border-bottom-color: var(--border);
}

[data-theme="dark"] .nav-link {
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    border-color: var(--border);
}
[data-theme="dark"] .nav-link:hover {
    background: #1e3a8a; /* primary 600 */
    color: white;
}

[data-theme="dark"] .form-control,
[data-theme="dark"] .form-select {
    background: var(--bg-primary);
    border-color: var(--border);
    color: var(--text-primary);
}
[data-theme="dark"] .form-control:focus,
[data-theme="dark"] .form-select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgb(37 99 235 / 0.2);
}

[data-theme="dark"] .url-input-section {
    background: var(--bg-tertiary);
}
[data-theme="dark"] .input-toggle {
    background: var(--bg-primary);
}

[data-theme="dark"] .file-upload {
    background: var(--bg-tertiary);
    border-color: var(--border);
}
[data-theme="dark"] .file-upload:hover {
    background: rgba(37, 99, 235, 0.12);
}
[data-theme="dark"] .file-upload.dragover {
    background: rgba(37, 99, 235, 0.18);
}

[data-theme="dark"] .table-responsive {
    border-color: var(--border);
}
[data-theme="dark"] .table,
[data-theme="dark"] .table>:not(caption)>*>* {
    background-color: transparent !important;
}
[data-theme="dark"] .table td,
[data-theme="dark"] .table th {
    border-color: var(--border) !important;
}
[data-theme="dark"] .table-light,
[data-theme="dark"] .table th {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}
[data-theme="dark"] .table-hover tbody tr:hover {
    background: #0f1a2d;
}
[data-theme="dark"] .table-striped>tbody>tr:nth-of-type(odd)>td {
    background: rgba(255, 255, 255, 0.04);
}

[data-theme="dark"] .toast {
    background: var(--bg-primary);
    border-color: var(--border);
    color: var(--text-primary);
}

/* Fix các nền trắng còn sót khi dark */
[data-theme="dark"] .bg-white {
    background: var(--bg-primary) !important;
}
[data-theme="dark"] .bg-light {
    background: var(--bg-tertiary) !important;
}
[data-theme="dark"] .border,
[data-theme="dark"] .border-bottom,
[data-theme="dark"] .border-top,
[data-theme="dark"] .border-start,
[data-theme="dark"] .border-end {
    border-color: var(--border) !important;
}

[data-theme="dark"] .modal-content,
[data-theme="dark"] .modal-header,
[data-theme="dark"] .modal-footer {
    background: var(--bg-primary);
}
[data-theme="dark"] .input-group,
[data-theme="dark"] .input-group .form-control,
[data-theme="dark"] .input-group .btn {
    background: var(--bg-primary);
    color: var(--text-primary);
}
[data-theme="dark"] .img-thumbnail {
    background-color: var(--bg-primary);
    border-color: var(--border);
}
[data-theme="dark"] .progress {
    background-color: var(--bg-tertiary);
}
[data-theme="dark"] .btn-outline-secondary {
    color: var(--text-secondary);
    border-color: var(--border);
}
[data-theme="dark"] .btn-outline-secondary:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

[data-theme="dark"] .pagination .page-link {
    background: var(--bg-primary);
    border-color: var(--border);
    color: var(--text-primary);
}
[data-theme="dark"] .pagination .page-link:hover {
    background: var(--primary);
    color: white;
}

/* Forms */
.form-group {
    margin-bottom: 1.5rem;
}

.form-label {
    display: block;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.form-control,
.form-select {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--bg-primary);
    color: var(--text-primary);
    transition: all 0.2s ease;
}

.form-control:focus,
.form-select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgb(37 99 235 / 0.1);
}

.form-text {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-top: 0.25rem;
}

.form-check-input {
    margin-right: 0.5rem;
}

.form-check-label {
    color: var(--text-primary);
}

.form-check-input:checked {
    background-color: var(--primary);
    border-color: var(--primary);
}

.form-check-input:focus {
    box-shadow: 0 0 0 0.25rem rgba(37, 99, 235, 0.25);
}

/* File Upload */
.file-upload {
    border: 2px dashed var(--border);
    border-radius: 12px;
    padding: 10px;
    text-align: center;
    background: var(--bg-tertiary);
    transition: all 0.2s ease;
    cursor: pointer;
}

.file-upload:hover {
    border-color: var(--primary);
    background: rgb(37 99 235 / 0.05);
}

.file-upload.dragover {
    border-color: var(--primary);
    background: rgb(37 99 235 / 0.1);
}

.file-upload-icon {
    font-size: 3rem;
    color: var(--primary);
    margin-bottom: 1rem;
}

.file-upload-text {
    font-size: 1.125rem;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.file-upload-hint {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* Table */
.table-responsive {
    background: var(--bg-primary);
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid var(--border);
}

.table {
    width: 100%;
    margin: 0;
    color: var(--text-primary);
}

.table-light {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.table th {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    font-weight: 600;
    padding: 1rem;
    border: none;
}

.table td {
    padding: 1rem;
    border-top: 1px solid var(--border);
    color: var(--text-primary);
}

.table-hover tbody tr:hover {
    background: var(--bg-tertiary);
}

.table-striped>tbody>tr:nth-of-type(odd)>td {
    background: rgba(0, 0, 0, 0.02);
}

[data-theme="dark"] .table-striped>tbody>tr:nth-of-type(odd)>td {
    background: rgba(255, 255, 255, 0.02);
}

/* Modal */
.modal-content {
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
    color: var(--text-primary);
}

.modal-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border);
    background: var(--bg-tertiary);
}

.modal-title {
    color: var(--text-primary);
    font-weight: 600;
}

.modal-body {
    padding: 2rem;
}

.modal-footer {
    padding: 1.5rem;
    border-top: 1px solid var(--border);
    background: var(--bg-tertiary);
    display: flex;
    gap: 1rem;
    justify-content: flex-end;
}

.btn-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-primary);
}

/* Utilities */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

.d-flex {
    display: flex;
}

.align-items-center {
    align-items: center;
}

.justify-content-between {
    justify-content: space-between;
}

.justify-content-center {
    justify-content: center;
}

.text-center {
    text-align: center;
}


.visually-hidden {
    position: absolute !important;
    width: 1px !important;
    height: 1px !important;
    padding: 0 !important;
    margin: -1px !important;
    overflow: hidden !important;
    clip: rect(0, 0, 0, 0) !important;
    white-space: nowrap !important;
    border: 0 !important;
}

.position-fixed {
    position: fixed;
}

.top-0 {
    top: 0;
}

.end-0 {
    right: 0;
}

.p-3 {
    padding: 1rem;
}

.p-0 {
    padding: 0;
}

.border-bottom {
    border-bottom: 1px solid var(--border);
}

.shadow-sm {
    box-shadow: var(--shadow);
}

.fade-in {
    animation: fadeIn 0.6s ease-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade {
    transition: opacity 0.15s linear;
}

.show {
    opacity: 1;
}

.h5 {
    font-size: 1.25rem;
}

.fw-bold {
    font-weight: 700;
}

.text-danger {
    color: var(--danger) !important;
}

/* Tab Content */

.tab-pane {
    display: none;
}

.tab-pane.active {
    display: block;
}

/* Image Gallery */
.image-gallery {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1rem;
    margin-top: 2rem;
}

.image-card {
    padding-top: 10px;
}

.image-card:hover {
    transform: translateY(-2px);
}

/* Khi chọn, highlight trực tiếp khung ảnh */
.image-thumb.selected {
    outline: 2px solid var(--danger);
    outline-offset: -2px;
    box-shadow: 0 0 0 2px rgb(37 99 235 / 0.15);

}

.image-checkbox {
    position: absolute;
    top: 0.5rem;
    left: 0.5rem;
    z-index: 4;
    transform: scale(1.5);
}

/* Beautify image cards */
.image-card .card {
    border: 1px solid var(--border);
    border-radius: 12px;
    background: var(--bg-primary);
    transition: box-shadow 0.2s ease, transform 0.2s ease;
}

.image-card .card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-3px);
}

/* Giữ chiều cao ảnh như cũ (theo layout trước đây) */
.image-card .card-img-top {
    height: 350px; /* khớp style cũ ở .card-img-top */
    object-fit: cover;
    border-radius: 0 !important;
}

/* Overlay controls on image */
.image-thumb {
    position: relative;
}

.image-overlay {
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    background: #46464626;
    justify-content: space-between;
    align-items: center;
    gap: 8px;
    color: #fff;
    padding: 5px 10px;
    z-index: 3;
}

.image-overlay .btn {
    border-radius: 6px;
}

.image-overlay .btn-outline-light {
    --bs-btn-color: #fff;
    --bs-btn-border-color: rgba(255,255,255,0.7);
    --bs-btn-hover-bg: rgba(255,255,255,0.15);
    --bs-btn-hover-color: #fff;
}

/* Icon delete màu đỏ cho dễ nhận biết */
.image-overlay .btn-delete i {
    color: #ef4444;
}
.image-overlay .btn-delete:hover i {
    color: #dc2626;
}

.image-date {
    font-size: 0.8rem;
    text-shadow: 0 1px 2px rgba(0,0,0,0.5);
}

.image-card .card-body {
    padding: 0.75rem;
}

.image-card .input-group.input-group-sm .form-control {
    font-size: 0.8rem;
}

.image-card .card-footer {
    background: var(--bg-primary);
    border-top: 1px solid var(--border);
}

.image-card .btn-outline-danger,
.image-card .btn-outline-secondary {
    border-color: var(--border);
}

.image-card .btn-outline-danger:hover,
.image-card .btn-outline-secondary:hover {
    background: var(--bg-tertiary);
}

/* Dark mode refinements for image cards */
[data-theme="dark"] .image-card .card {
    background: var(--bg-primary);
    border-color: var(--border);
}
[data-theme="dark"] .image-card .card-footer {
    background: var(--bg-primary);
    border-top-color: var(--border);
}

/* Toast */
.toast {
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: 8px;
    box-shadow: var(--shadow-lg);
    margin-bottom: 0.5rem;
    padding: 1rem;
    min-width: 300px;
    color: var(--text-primary);
}

.toast+.toast {
    margin-top: 0.5rem;
}

/* Backup states */
.backup-disconnected .backup-settings-content {
    display: none;
}

.backup-connected .connect-button-container {
    display: none;
}

/* Responsive */
@media (max-width: 768px) {
    .nav-tabs {
        flex-wrap: wrap;
    }

    .nav-link {
        font-size: 0.875rem;
        padding: 0.5rem 0.75rem;
    }

    .card-body {
        padding: 1.5rem;
    }

    .navbar-brand {
        font-size: 1.25rem;
    }

    .col-auto {
        margin-bottom: 0.5rem;
    }
}

/* URL Input Section */
.url-input-section {
    background: var(--bg-tertiary);
    border-radius: 8px;
    padding: 1.5rem;
    margin-bottom: 2rem;
}

.input-toggle {
    display: flex;
    background: var(--bg-primary);
    border-radius: 6px;
    padding: 0.25rem;
    margin-bottom: 1rem;
}

.input-toggle button {
    flex: 1;
    padding: 0.5rem 1rem;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.input-toggle button.active {
    background: var(--primary);
    color: white;
}

/* Row and column utilities */
.row {
    display: flex;
    flex-wrap: wrap;
    margin: 0 -0.5rem;
}

.col-auto {
    flex: 0 0 auto;
    padding: 0 0.5rem;
}

.g-2 {
    gap: 0.5rem;
}

.g-3 {
    gap: 1rem;
}

/* Input group */
.input-group {
    display: flex;
    gap: 0.5rem;
}

.input-group .form-control,
.input-group .form-select {
    flex: 1;
}

/* Pagination */
.pagination {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    margin-top: 2rem;
}

.pagination .page-link {
    padding: 0.5rem 1rem;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    color: var(--text-primary);
    text-decoration: none;
    border-radius: 6px;
}

.pagination .page-link:hover {
    background: var(--primary);
    color: white;
}

.pagination .page-item.active .page-link {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

/* Status indicators */
.text-muted {
    color: var(--text-muted) !important;
}

/* Bootstrap compatibility */
.container-fluid {
    width: 100%;
    padding-right: 15px;
    padding-left: 15px;
    margin-right: auto;
    margin-left: auto;
}

.align-middle {
    vertical-align: middle;
}

.fs-5 {
    font-size: 1.25rem;
}

/* Pagination Styles */
.pagination {
    --bs-pagination-bg: var(--bg-primary);
    --bs-pagination-border-color: var(--border);
    --bs-pagination-color: var(--text-primary);
    --bs-pagination-hover-bg: var(--bg-tertiary);
    --bs-pagination-hover-border-color: var(--border);
    --bs-pagination-active-bg: var(--primary);
    --bs-pagination-active-border-color: var(--primary);
    --bs-pagination-disabled-color: var(--text-muted);
    gap: 0.25rem;
}

.pagination .page-item {
    margin: 0 1px;
}

.pagination .page-link {
    border-radius: 6px;
    padding: 0.5rem 0.75rem;
    font-weight: 500;
    transition: all 0.2s ease;
}

.pagination .page-item:first-child .page-link,
.pagination .page-item:last-child .page-link {
    border-radius: 6px;
}

.pagination .page-item.active .page-link {
    box-shadow: 0 2px 4px rgb(37 99 235 / 0.2);
}

/* Video Search and Filter */
#video-search-input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 0.2rem rgb(37 99 235 / 0.25);
}

#video-sort-select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 0.2rem rgb(37 99 235 / 0.25);
}

.card-header .d-flex .input-group,
.card-header .d-flex .form-select {
    border: 1px solid var(--border);
    background: var(--bg-primary);
    color: var(--text-primary);
}

.card-header .d-flex .input-group .form-control,
.card-header .d-flex .form-select {
    border: none;
    background: transparent;
    color: var(--text-primary);
}

.card-header .d-flex .input-group .form-control:focus {
    box-shadow: none;
}

.card-header .d-flex .btn-outline-secondary {
    border-color: var(--border);
    color: var(--text-secondary);
}

.card-header .d-flex .btn-outline-secondary:hover {
    background: var(--bg-tertiary);
    border-color: var(--border);
    color: var(--text-primary);
}

/* Video Info Text */
.text-muted {
    color: var(--text-muted) !important;
}

/* Processing Video Rows */
tr[data-processing-id] {
    background: var(--bg-tertiary);
    border-left: 3px solid var(--primary);
}

tr[data-processing-id] .video-status-text {
    font-weight: 600;
    font-size: 0.85rem;
}

tr[data-processing-id] .progress {
    border: 1px solid var(--border);
    box-shadow: inset 0 1px 2px rgba(0,0,0,0.1);
}

tr[data-processing-id] .btn-group .btn {
    border-radius: 4px;
    margin: 0 1px;
}

tr[data-processing-id] .btn-group .btn:disabled {
    opacity: 0.6;
}

/* Processing Icons Animation */
tr[data-processing-id] .bi-gear-fill {
    animation: spin 2s linear infinite;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}