input[type="radio"] {
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    width: 16px;
    height: 16px;
    border: 2px solid var(--accent-color);
    border-radius: 50%;
    outline: none;
    transition: all 0.15s ease;
    position: relative;
    flex-shrink: 0;
}

input[type="radio"]:checked {
    background-color: var(--accent-color);
    border-color: var(--accent-color);
}

input[type="radio"]:checked::after {
    content: "";
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background-color: white;
}

input[type="checkbox"] {
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    width: 36px;
    height: 20px;
    border: 2px solid var(--dock-border);
    border-radius: 10px;
    outline: none;
    transition: all 0.15s ease;
    position: relative;
    background: rgba(255, 255, 255, 0.08);
    cursor: pointer;
    flex-shrink: 0;
}

input[type="checkbox"]:checked {
    background: var(--accent-color);
    border-color: var(--accent-color);
}

input[type="checkbox"]::after {
    content: "";
    position: absolute;
    top: 2px;
    left: 2px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: #fff;
    transition: transform 0.15s ease;
}

input[type="checkbox"]:checked::after {
    transform: translateX(16px);
}

.settings-panel-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 3100;
    pointer-events: none;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.25s ease, visibility 0.25s ease;
}

.settings-panel-modal.show {
    opacity: 1;
    visibility: visible;
}

.settings-panel-dialog {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 92%;
    max-width: 560px;
    height: 65vh;
    max-height: 480px;
    background: var(--glass-bg);
    backdrop-filter: blur(24px) saturate(180%);
    -webkit-backdrop-filter: blur(24px) saturate(180%);
    border: 1px solid var(--dock-border);
    border-radius: 14px;
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.4);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    pointer-events: auto;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.25s ease, visibility 0.25s ease;
}

.settings-panel-dialog.show {
    opacity: 1;
    visibility: visible;
}

.settings-panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 20px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    flex-shrink: 0;
    cursor: move;
    user-select: none;
}

.settings-panel-header h3 {
    margin: 0;
    color: var(--text-color);
    font-size: 1.05rem;
    font-weight: 600;
}

.settings-panel-close {
    background: none;
    border: none;
    color: var(--text-color);
    opacity: 0.6;
    cursor: pointer;
    font-size: 1rem;
    padding: 4px 8px;
    border-radius: 6px;
    transition: opacity 0.15s ease, background 0.15s ease;
}

.settings-panel-close:hover {
    opacity: 1;
    background: rgba(255, 255, 255, 0.1);
}

.settings-panel-body {
    display: flex;
    flex: 1;
    overflow: hidden;
    position: relative;
}

.settings-panel-sidebar {
    width: 130px;
    flex-shrink: 0;
    border-right: 1px solid rgba(255, 255, 255, 0.08);
    overflow-y: auto;
    padding: 8px 0;
}

.settings-panel-sidebar::-webkit-scrollbar {
    width: 4px;
}

.settings-panel-sidebar::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.15);
    border-radius: 2px;
}

.settings-panel-cat-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 9px 14px;
    cursor: pointer;
    color: var(--text-color);
    font-size: 0.82rem;
    opacity: 0.7;
    transition: opacity 0.15s ease, background 0.15s ease;
    border: none;
    background: none;
    width: 100%;
    text-align: left;
}

.settings-panel-cat-item:hover {
    opacity: 1;
    background: rgba(255, 255, 255, 0.06);
}

.settings-panel-cat-item.active {
    opacity: 1;
    background: var(--accent-color);
    color: #fff;
    border-radius: 6px;
    margin: 0 6px;
    width: calc(100% - 12px);
}

.settings-panel-cat-item i {
    width: 16px;
    text-align: center;
    font-size: 0.85rem;
}

.settings-panel-main {
    flex: 1;
    overflow-y: auto;
    padding: 16px 20px;
}

.settings-panel-main::-webkit-scrollbar {
    width: 5px;
}

.settings-panel-main::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.15);
    border-radius: 3px;
}

.settings-section {
    margin-bottom: 22px;
}

.settings-section h4 {
    margin: 0 0 12px 0;
    color: var(--text-color);
    font-size: 0.95rem;
    font-weight: 600;
    opacity: 0.85;
}

.radio-group {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.settings-radio-item {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-color);
    cursor: pointer;
    padding: 8px 14px;
    border-radius: 8px;
    background: var(--glass-light);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--glass-light-border);
    transition: background 0.15s ease, border-color 0.15s ease;
    font-size: 0.88rem;
}

.settings-radio-item:hover {
    background: var(--glass-light-hover);
    border-color: var(--glass-light-border-hover);
}

input[type="radio"]:checked + span {
    color: var(--accent-color);
}

.settings-toggle-row {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    color: var(--text-color);
    font-size: 0.88rem;
}

.settings-custom-bg {
    margin-top: 12px;
}

.settings-custom-bg input[type="text"] {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--glass-light-border);
    border-radius: 8px;
    background: var(--glass-light);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    color: var(--text-color);
    font-size: 0.88rem;
    transition: border-color 0.15s ease;
    box-sizing: border-box;
}

.settings-custom-bg input[type="text"]:focus {
    outline: none;
    border-color: var(--accent-color);
}

.settings-btn {
    padding: 8px 18px;
    border-radius: 8px;
    cursor: pointer;
    border: none;
    font-size: 0.85rem;
    font-weight: 500;
    transition: background 0.15s ease, transform 0.1s ease;
}

.settings-btn:active {
    transform: scale(0.97);
}

.settings-btn.reset-btn {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-color);
    border: 1px solid rgba(255, 255, 255, 0.15);
}

.settings-btn.reset-btn:hover {
    background: rgba(255, 255, 255, 0.15);
    border-color: rgba(255, 255, 255, 0.25);
}

.settings-btn-danger {
    background: var(--error-color);
    color: #fff;
    border-color: var(--error-color);
}

.settings-btn-danger:hover {
    opacity: 0.9;
}

.background-preview {
    width: 100%;
    height: 100px;
    border-radius: 8px;
    margin-top: 10px;
    background-size: cover;
    background-position: center;
    border: 1px solid rgba(255, 255, 255, 0.08);
    transition: transform 0.2s ease;
}

.background-preview:hover {
    transform: scale(1.02);
}

.settings-version-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 0;
    color: var(--text-color);
    font-size: 0.88rem;
}

.settings-version-value {
    color: var(--accent-color);
    font-weight: 600;
}

.settings-update-content {
    margin-top: 10px;
    padding: 12px 14px;
    background: rgba(255, 255, 255, 0.04);
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.06);
}

.settings-update-content p {
    margin: 4px 0;
    color: var(--text-color);
    font-size: 0.82rem;
    opacity: 0.75;
    line-height: 1.6;
}

@media (max-width: 640px) {
    .settings-panel-dialog {
        width: 96%;
        height: 70vh;
    }

    .settings-panel-sidebar {
        width: 100px;
    }

    .settings-panel-cat-item {
        padding: 7px 10px;
        font-size: 0.75rem;
    }

    .radio-group {
        flex-direction: column;
        gap: 8px;
    }
}

.engine-list-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 12px;
    border-radius: 8px;
    margin-bottom: 6px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.06);
    transition: background 0.15s ease;
}

.engine-list-item:hover {
    background: rgba(255, 255, 255, 0.08);
}

.engine-list-info {
    display: flex;
    flex-direction: column;
    gap: 2px;
    flex: 1;
    min-width: 0;
}

.engine-list-name {
    color: var(--text-color);
    font-size: 0.88rem;
    font-weight: 500;
}

.engine-list-url {
    color: var(--text-color);
    font-size: 0.72rem;
    opacity: 0.5;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.engine-list-actions {
    display: flex;
    gap: 4px;
    flex-shrink: 0;
    margin-left: 8px;
}

.engine-list-btn {
    width: 28px;
    height: 28px;
    border-radius: 6px;
    border: none;
    background: rgba(255, 255, 255, 0.08);
    color: var(--text-color);
    font-size: 0.72rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.15s ease, color 0.15s ease;
    opacity: 0.6;
}

.engine-list-btn:hover {
    opacity: 1;
    background: rgba(255, 255, 255, 0.15);
}

.engine-edit-btn:hover {
    color: var(--accent-color);
    background: rgba(34, 153, 255, 0.15);
}

.engine-delete-btn:hover {
    color: var(--error-color);
    background: rgba(255, 107, 107, 0.15);
}

.engine-builtin-badge {
    font-size: 0.65rem;
    padding: 2px 8px;
    border-radius: 4px;
    background: rgba(255, 255, 255, 0.06);
    color: var(--text-color);
    opacity: 0.45;
    flex-shrink: 0;
    margin-left: 8px;
}

.engine-add-btn {
    background: var(--accent-color);
    color: #fff;
    border: none;
    margin-top: 12px;
    width: 100%;
}

.engine-add-btn:hover {
    opacity: 0.9;
}

.engine-editor-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.3);
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.2s ease;
    border-radius: 0 0 14px 14px;
}

.engine-editor-overlay.show {
    opacity: 1;
}

.engine-editor {
    width: 88%;
    max-width: 320px;
    background: var(--glass-bg);
    backdrop-filter: blur(24px) saturate(180%);
    -webkit-backdrop-filter: blur(24px) saturate(180%);
    border: 1px solid var(--dock-border);
    border-radius: 12px;
    box-shadow: 0 12px 36px rgba(0, 0, 0, 0.4);
    overflow: hidden;
}

.engine-editor-header {
    padding: 12px 16px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.engine-editor-header h3 {
    margin: 0;
    color: var(--text-color);
    font-size: 0.95rem;
    font-weight: 600;
}

.engine-editor-body {
    padding: 16px;
}

.engine-editor-field {
    margin-bottom: 14px;
}

.engine-editor-field:last-child {
    margin-bottom: 0;
}

.engine-editor-field label {
    display: block;
    color: var(--text-color);
    font-size: 0.78rem;
    margin-bottom: 5px;
    opacity: 0.75;
    font-weight: 500;
}

.engine-editor-input {
    width: 100%;
    box-sizing: border-box;
    padding: 8px 12px;
    border: 1px solid var(--glass-light-border);
    border-radius: 8px;
    background: var(--glass-light);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    color: var(--text-color);
    font-size: 0.85rem;
    transition: border-color 0.15s ease;
}

.engine-editor-input:focus {
    outline: none;
    border-color: var(--accent-color);
}

.engine-editor-hint {
    display: block;
    font-size: 0.68rem;
    color: var(--text-color);
    opacity: 0.4;
    margin-top: 4px;
    line-height: 1.4;
}

.engine-editor-footer {
    display: flex;
    justify-content: flex-end;
    gap: 8px;
    padding: 12px 16px;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.engine-save-btn {
    background: var(--accent-color);
    color: #fff;
    border: none;
}

.engine-save-btn:hover {
    opacity: 0.9;
}

.settings-wallpaper-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
    margin-top: 12px;
}

.wallpaper-card {
    cursor: pointer;
    border-radius: 8px;
    overflow: hidden;
    border: 2px solid transparent;
    transition: border-color 0.2s ease, transform 0.15s ease;
    background: rgba(255, 255, 255, 0.04);
}

.wallpaper-card:hover {
    transform: scale(1.03);
    border-color: rgba(255, 255, 255, 0.2);
}

.wallpaper-card.active {
    border-color: var(--accent-color);
}

.wallpaper-thumb {
    width: 100%;
    aspect-ratio: 16 / 9;
    background-size: cover;
    background-position: center;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: rgba(255, 255, 255, 0.04);
}

.wallpaper-custom-thumb {
    background-color: rgba(255, 255, 255, 0.06);
    border: 2px dashed rgba(255, 255, 255, 0.15);
}

.wallpaper-name {
    text-align: center;
    padding: 5px 4px;
    color: var(--text-color);
    font-size: 0.72rem;
    opacity: 0.75;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

@media (max-width: 640px) {
    .settings-wallpaper-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}