#isifu-accessibility-trigger {
    position: fixed;
    bottom: 24px;
    right: 24px;
    width: 60px;
    height: 60px;
    background-color: var(--isifu-accent, #0284c7);
    color: #fff;
    border: none;
    border-radius: 50%;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 999999;
    transition: transform 0.2s;
}
#isifu-accessibility-trigger:hover {
    transform: scale(1.05);
}

/* Base Light Theme */
#isifu-accessibility-app.isifu-theme-light {
    --isifu-panel-bg: #ffffff;
    --isifu-panel-text: #1f2937;
    --isifu-btn-bg: #f9fafb;
    --isifu-btn-hover: #f3f4f6;
    --isifu-btn-border: #e5e7eb;
    --isifu-active-border: var(--isifu-accent, #0284c7);
    --isifu-slider-row-bg: #f9fafb;
    --isifu-border: #e5e7eb;
    --isifu-header-action-hover: rgba(0,0,0,0.05);
    --isifu-scrollbar-thumb: #cbd5e1;
}

/* Base Dark Theme */
#isifu-accessibility-app.isifu-theme-dark {
    --isifu-panel-bg: #262626;
    --isifu-panel-text: #ffffff;
    --isifu-btn-bg: #333333;
    --isifu-btn-hover: #3f3f3f;
    --isifu-btn-border: transparent;
    --isifu-active-border: var(--isifu-accent, #0284c7);
    --isifu-slider-row-bg: #333333;
    --isifu-border: #4d4d4d;
    --isifu-header-action-hover: rgba(255,255,255,0.1);
    --isifu-scrollbar-thumb: #555555;
}

#isifu-accessibility-app {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

#isifu-accessibility-panel {
    position: fixed;
    bottom: 100px;
    right: 24px;
    width: 420px;
    max-height: calc(100vh - 120px);
    background-color: var(--isifu-panel-bg);
    color: var(--isifu-panel-text);
    border-radius: 20px;
    box-shadow: 0 10px 25px rgba(0,0,0,0.5);
    z-index: 999999;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    opacity: 0;
    pointer-events: none;
    transform: translateY(20px);
    transition: all 0.3s ease;
}
#isifu-accessibility-app.isifu-theme-light #isifu-accessibility-panel {
    box-shadow: 0 10px 25px rgba(0,0,0,0.15);
}

#isifu-accessibility-panel[aria-hidden="false"] {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
}
#isifu-accessibility-panel:not([hidden]) {
    display: flex;
}

.isifu-panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px 24px 16px;
}
.isifu-panel-header h2 {
    margin: 0;
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--isifu-panel-text);
}
.isifu-header-actions {
    display: flex;
    gap: 12px;
}
.isifu-header-actions button {
    background: transparent;
    border: none;
    color: var(--isifu-panel-text);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 4px;
}
#isifu-close-panel {
    background-color: var(--isifu-accent, #0284c7) !important;
    color: #ffffff !important;
    border-radius: 50% !important;
    width: 36px;
    height: 36px;
    transition: filter 0.2s;
}
#isifu-close-panel:hover {
    filter: brightness(1.1);
}
#isifu-reset-btn {
    width: 36px;
    height: 36px;
    transition: transform 0.3s;
}
#isifu-reset-btn:hover {
    transform: rotate(-45deg);
    background-color: var(--isifu-header-action-hover) !important;
}

.isifu-panel-content {
    padding: 0 24px 24px 24px;
    overflow-y: auto;
}
/* Custom Scrollbar for panel */
.isifu-panel-content::-webkit-scrollbar {
    width: 6px;
}
.isifu-panel-content::-webkit-scrollbar-thumb {
    background-color: var(--isifu-scrollbar-thumb);
    border-radius: 3px;
}

.isifu-button-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-bottom: 24px;
}

.isifu-grid-btn {
    background-color: var(--isifu-btn-bg);
    border: 1px solid var(--isifu-btn-border);
    border-radius: 8px;
    padding: 14px 12px;
    color: var(--isifu-panel-text);
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 0.85rem;
    cursor: pointer;
    text-align: left;
    transition: all 0.2s;
}

.isifu-grid-btn:hover {
    background-color: var(--isifu-btn-hover);
}

.isifu-grid-btn.is-active {
    border-color: var(--isifu-active-border);
}

.isifu-btn-icon {
    display: flex;
    align-items: center;
    justify-content: center;
}
.isifu-btn-icon svg {
    width: 24px;
    height: 24px;
}

.isifu-slider-container {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.isifu-slider-row {
    background-color: var(--isifu-slider-row-bg);
    border: 1px solid var(--isifu-btn-border);
    border-radius: 8px;
    padding: 12px 16px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.isifu-slider-label {
    flex: 1;
    font-size: 0.9rem;
    font-weight: 500;
}

.isifu-slider-custom-range {
    flex: 1;
    display: flex;
    align-items: center;
}
.isifu-slider-custom-range input[type="range"] {
    width: 100%;
    accent-color: var(--isifu-accent, #0284c7);
}

.isifu-slider-value {
    width: 50px;
    text-align: right;
    font-variant-numeric: tabular-nums;
    font-size: 0.9rem;
    color: var(--isifu-panel-text);
    opacity: 0.8;
}

.isifu-slider-actions {
    display: flex;
    border-left: 1px solid var(--isifu-border);
    padding-left: 6px;
    gap: 4px;
}

.isifu-slider-btn {
    background: transparent;
    color: var(--isifu-panel-text);
    border: none;
    padding: 6px 8px;
    cursor: pointer;
    border-radius: 4px;
    transition: background 0.2s;
}
.isifu-slider-btn:hover {
    background-color: var(--isifu-header-action-hover);
    color: var(--isifu-accent, #0284c7);
}

.isifu-footer-links {
    margin-top: 24px;
    padding-top: 20px;
    border-top: 1px solid var(--isifu-border);
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.isifu-statement {
    font-size: 0.85rem;
    line-height: 1.4;
    color: var(--isifu-panel-text);
    opacity: 0.9;
}

.isifu-contact {
    font-size: 0.85rem;
    line-height: 1.4;
    color: var(--isifu-panel-text);
}

.isifu-btn-primary {
    display: inline-block;
    text-align: center;
    padding: 10px 16px;
    background-color: var(--isifu-accent, #0284c7);
    color: #ffffff;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 500;
    transition: filter 0.2s;
}
.isifu-btn-primary:hover {
    filter: brightness(1.1);
    color: #ffffff;
    text-decoration: none;
}

.isifu-footer {
    margin-top: 20px;
    padding: 12px 24px 0 24px;
    text-align: center;
    font-size: 0.8rem;
    color: var(--isifu-panel-text);
    opacity: 0.6;
}

.isifu-footer a {
    color: inherit;
    text-decoration: underline;
}

.isifu-footer a:hover {
    color: var(--isifu-accent, #0284c7);
    text-decoration: none;
}

/* --- Mobile Responsiveness --- */
@media (max-width: 480px) {
    #isifu-accessibility-trigger {
        right: 16px;
        bottom: 16px;
        width: 50px;
        height: 50px;
    }
    
    #isifu-accessibility-panel {
        width: calc(100vw - 32px);
        right: 16px;
        bottom: 80px;
        max-height: calc(100vh - 100px);
        border-radius: 16px;
    }
    
    .isifu-panel-header {
        padding: 16px 16px 12px;
    }
    .isifu-panel-header h2 {
        font-size: 1.15rem;
    }

    .isifu-panel-content {
        padding: 0 16px 16px 16px;
    }

    .isifu-button-grid {
        gap: 8px;
    }

    .isifu-grid-btn {
        flex-direction: column;
        justify-content: center;
        text-align: center;
        padding: 12px 8px;
        font-size: 0.75rem;
        gap: 8px;
    }

    .isifu-slider-row {
        flex-wrap: wrap; /* Allow the label to break to its own line */
        padding: 12px;
        gap: 8px;
    }
    
    .isifu-slider-label {
        flex: 1 1 100%;
        margin-bottom: 2px;
    }

    .isifu-slider-actions {
        border-left: none;
        padding-left: 0;
    }

    .isifu-slider-value {
        width: 45px;
    }
}