/* ========================================
   FOCUS VISIBLE STYLES
   Item 55/78: Keyboard navigation accessibility
   ======================================== */

/* ====================================
   RESET DEFAULT FOCUS STYLES
   ==================================== */

/* Remove default outline for mouse users */
*:focus:not(:focus-visible) {
    outline: none;
}

/* ====================================
   FOCUS VISIBLE STYLES
   ==================================== */

/* Primary focus style for keyboard navigation */
*:focus-visible {
    outline: 3px solid var(--primary-color, #1565C0);
    outline-offset: 3px;
    border-radius: 4px;
}

/* ====================================
   LINKS
   ==================================== */

a:focus-visible {
    outline: 3px solid var(--secondary-color, #00f2fe);
    outline-offset: 4px;
    background: rgba(0, 242, 254, 0.1);
    border-radius: 4px;
}

/* Navigation links */
.nav-links a:focus-visible,
.navbar a:focus-visible {
    outline: 3px solid #fff;
    outline-offset: 2px;
    background: rgba(255, 255, 255, 0.15);
}

/* Footer links */
footer a:focus-visible {
    outline: 2px solid var(--secondary-color, #00f2fe);
    outline-offset: 2px;
}

/* ====================================
   BUTTONS
   ==================================== */

button:focus-visible,
.btn:focus-visible,
input[type="submit"]:focus-visible,
input[type="button"]:focus-visible {
    outline: 3px solid #fff;
    outline-offset: 4px;
    box-shadow: 0 0 0 6px rgba(255, 255, 255, 0.2);
}

/* Primary buttons */
.btn-primary:focus-visible {
    outline: 3px solid #fff;
    box-shadow: 0 0 0 6px rgba(255, 255, 255, 0.3), 
                0 10px 30px rgba(255, 59, 59, 0.4);
}

/* Secondary buttons */
.btn-secondary:focus-visible {
    outline: 3px solid var(--primary-color, #1565C0);
    box-shadow: 0 0 0 6px rgba(21, 101, 192, 0.2);
}

/* ====================================
   FORM INPUTS
   ==================================== */

input:focus-visible,
textarea:focus-visible,
select:focus-visible {
    outline: 2px solid var(--primary-color, #1565C0);
    outline-offset: 2px;
    border-color: var(--primary-color, #1565C0);
    box-shadow: 0 0 0 4px rgba(21, 101, 192, 0.1);
}

/* Email input */
input[type="email"]:focus-visible {
    outline: 2px solid var(--secondary-color, #00f2fe);
    border-color: var(--secondary-color, #00f2fe);
    box-shadow: 0 0 0 4px rgba(0, 242, 254, 0.1);
}

/* Error state focus */
input.error:focus-visible,
input:invalid:focus-visible {
    outline: 2px solid #ff3b3b;
    border-color: #ff3b3b;
    box-shadow: 0 0 0 4px rgba(255, 59, 59, 0.1);
}

/* ====================================
   CHECKBOXES & RADIO BUTTONS
   ==================================== */

input[type="checkbox"]:focus-visible,
input[type="radio"]:focus-visible {
    outline: 2px solid var(--primary-color, #1565C0);
    outline-offset: 3px;
    box-shadow: 0 0 0 5px rgba(21, 101, 192, 0.15);
}

/* ====================================
   LANGUAGE SWITCHER
   ==================================== */

.lang-btn:focus-visible {
    outline: 2px solid #fff;
    outline-offset: 2px;
    background: rgba(255, 255, 255, 0.2);
    transform: scale(1.05);
}

/* ====================================
   MOBILE MENU
   ==================================== */

.mobile-menu-btn:focus-visible {
    outline: 3px solid #fff;
    outline-offset: 2px;
    background: rgba(255, 255, 255, 0.15);
}

/* ====================================
   CARDS & INTERACTIVE ELEMENTS
   ==================================== */

.card:focus-visible,
.feature-card:focus-visible,
.use-case:focus-visible {
    outline: 3px solid var(--secondary-color, #00f2fe);
    outline-offset: 4px;
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 242, 254, 0.3);
}

/* ====================================
   SOCIAL MEDIA BUTTONS
   ==================================== */

.social-links a:focus-visible,
.social-share-btn:focus-visible {
    outline: 2px solid #fff;
    outline-offset: 3px;
    transform: scale(1.1);
    box-shadow: 0 0 0 5px rgba(255, 255, 255, 0.2);
}

/* ====================================
   MODAL & POPUP
   ==================================== */

.modal:focus-visible,
.popup:focus-visible {
    outline: 3px solid var(--primary-color, #1565C0);
    outline-offset: -3px;
}

.modal-close:focus-visible,
.popup-close:focus-visible {
    outline: 2px solid #ff3b3b;
    outline-offset: 2px;
    background: rgba(255, 59, 59, 0.1);
}

/* ====================================
   SKIP LINKS
   ==================================== */

.skip-link:focus-visible {
    outline: 3px solid #fff;
    outline-offset: 0;
    background: var(--primary-color, #1565C0);
    color: white;
    padding: 12px 16px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

/* ====================================
   TABS & ACCORDIONS
   ==================================== */

[role="tab"]:focus-visible {
    outline: 2px solid var(--primary-color, #1565C0);
    outline-offset: 2px;
    background: rgba(21, 101, 192, 0.1);
}

[role="button"]:focus-visible {
    outline: 2px solid var(--primary-color, #1565C0);
    outline-offset: 3px;
}

/* ====================================
   IMAGES WITH LINKS
   ==================================== */

a img:focus-visible {
    outline: 3px solid var(--secondary-color, #00f2fe);
    outline-offset: 4px;
}

/* ====================================
   EMERGENCY-SPECIFIC STYLES
   ==================================== */

/* SOS Button */
.sos-button:focus-visible,
.emergency-btn:focus-visible {
    outline: 4px solid #fff;
    outline-offset: 4px;
    box-shadow: 0 0 0 8px rgba(255, 59, 59, 0.3),
                0 0 20px rgba(255, 59, 59, 0.5);
    animation: emergencyPulse 1s infinite;
}

@keyframes emergencyPulse {
    0%, 100% {
        box-shadow: 0 0 0 8px rgba(255, 59, 59, 0.3),
                    0 0 20px rgba(255, 59, 59, 0.5);
    }
    50% {
        box-shadow: 0 0 0 12px rgba(255, 59, 59, 0.2),
                    0 0 30px rgba(255, 59, 59, 0.6);
    }
}

/* ====================================
   HIGH CONTRAST MODE
   ==================================== */

@media (prefers-contrast: high) {
    *:focus-visible {
        outline-width: 4px;
        outline-color: currentColor;
    }
}

/* ====================================
   DARK MODE ADJUSTMENTS
   ==================================== */

@media (prefers-color-scheme: dark) {
    *:focus-visible {
        outline-color: #4facfe;
    }
    
    button:focus-visible,
    .btn:focus-visible {
        outline-color: #00f2fe;
    }
}

/* ====================================
   REDUCED MOTION
   ==================================== */

@media (prefers-reduced-motion: reduce) {
    *:focus-visible {
        transition: none;
        animation: none;
    }
    
    .sos-button:focus-visible,
    .emergency-btn:focus-visible {
        animation: none;
    }
}

/* ====================================
   FOCUS WITHIN (for containers)
   ==================================== */

/* Highlight parent when child has focus */
.form-group:focus-within {
    background: rgba(21, 101, 192, 0.03);
    border-radius: 8px;
}

.search-container:focus-within {
    box-shadow: 0 0 0 3px rgba(21, 101, 192, 0.2);
}

/* ====================================
   UTILITY CLASSES
   ==================================== */

/* Remove focus for specific elements (use sparingly) */
.no-focus-visible:focus-visible {
    outline: none;
}

/* Custom focus color */
.focus-primary:focus-visible {
    outline-color: var(--primary-color, #1565C0);
}

.focus-secondary:focus-visible {
    outline-color: var(--secondary-color, #00f2fe);
}

.focus-success:focus-visible {
    outline-color: #4caf50;
}

.focus-error:focus-visible {
    outline-color: #ff3b3b;
}

.focus-warning:focus-visible {
    outline-color: #ff9800;
}