/* ========================================
   KEYBOARD NAVIGATION - FOCUS STYLES
   ======================================== */

/* Global focus indicator for all interactive elements */
*:focus,
*:focus-visible {
    outline: 3px solid #2196F3 !important;
    outline-offset: 2px !important;
    box-shadow: 0 0 0 4px rgba(33, 150, 243, 0.3) !important;
    transition: outline 0.15s ease, box-shadow 0.15s ease;
}

/* Remove focus for mouse users (optional - only show for keyboard) */
*:focus:not(:focus-visible) {
    outline: none !important;
    box-shadow: none !important;
}

/* Enhanced focus for buttons */
button:focus-visible,
.mud-button:focus-visible,
.mud-icon-button:focus-visible {
    outline: 3px solid #2196F3 !important;
    outline-offset: 3px !important;
    box-shadow: 0 0 0 5px rgba(33, 150, 243, 0.4) !important;
    transform: scale(1.02);
}

/* Enhanced focus for links */
a:focus-visible,
.mud-nav-link:focus-visible {
    outline: 3px solid #2196F3 !important;
    outline-offset: 2px !important;
    box-shadow: 0 0 0 4px rgba(33, 150, 243, 0.3) !important;
    background-color: rgba(33, 150, 243, 0.1);
    border-radius: 4px;
}

/* Enhanced focus for form inputs */
input:focus-visible,
textarea:focus-visible,
select:focus-visible,
.mud-input:focus-visible,
.mud-select:focus-visible {
    outline: 3px solid #2196F3 !important;
    outline-offset: 1px !important;
    box-shadow: 0 0 0 4px rgba(33, 150, 243, 0.3) !important;
}

/* Enhanced focus for cards and interactive containers */
.mud-card:focus-visible,
.mud-paper:focus-visible {
    outline: 3px solid #2196F3 !important;
    outline-offset: 4px !important;
    box-shadow: 0 0 0 6px rgba(33, 150, 243, 0.3), 
                0 4px 20px rgba(33, 150, 243, 0.2) !important;
}

/* Enhanced focus for table rows */
.mud-table-row:focus-within {
    background-color: rgba(33, 150, 243, 0.1) !important;
    outline: 2px solid #2196F3 !important;
}

/* Enhanced focus for navigation menu items */
.mud-nav-link:focus-visible {
    background-color: rgba(33, 150, 243, 0.15) !important;
    outline: 3px solid #2196F3 !important;
    outline-offset: -2px !important;
}

/* Enhanced focus for chart elements */
.mud-chart:focus-visible,
.apexcharts-canvas:focus-visible {
    outline: 3px solid #2196F3 !important;
    outline-offset: 3px !important;
    box-shadow: 0 0 0 5px rgba(33, 150, 243, 0.3) !important;
}

/* Focus indicator animation */
@keyframes focusPulse {
    0%, 100% {
        box-shadow: 0 0 0 4px rgba(33, 150, 243, 0.3);
    }
    50% {
        box-shadow: 0 0 0 6px rgba(33, 150, 243, 0.5);
    }
}

/* Apply pulse animation to focused elements (optional) */
.focus-pulse:focus-visible {
    animation: focusPulse 1.5s ease-in-out infinite;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    *:focus-visible {
        outline: 4px solid #000 !important;
        outline-offset: 3px !important;
        box-shadow: 0 0 0 6px #FFD700 !important;
    }
}

/* Skip to content link (for accessibility) */
.skip-to-content {
    position: absolute;
    top: -40px;
    left: 0;
    background: #2196F3;
    color: white;
    padding: 8px 16px;
    text-decoration: none;
    border-radius: 0 0 4px 0;
    z-index: 100;
    font-weight: bold;
}

.skip-to-content:focus {
    top: 0;
}