/* Skip link for accessibility */
.skip-link {
    position: absolute;
    top: -9999px;
    left: 20px;
    background: var(--yellow);
    color: var(--black);
    padding: 15px 25px;
    z-index: 99999;
    text-decoration: none;
    font-family: 'Instrument Sans', sans-serif;
    font-weight: bold;
    border: 2px solid var(--black);
    transition: top 0.3s ease;
}

.skip-link:focus {
    top: 140px;
}

/* --- Focus Visibility for Keyboard Users --- */
:focus-visible {
    outline: 3px solid var(--black);
    outline-offset: 2px;
}

/* Inverted focus for dark backgrounds (Contact Section) */
.contact :focus-visible,
.hero .btn:hover:focus-visible {
    outline-color: var(--yellow);
}

/* Modal is light/gradient, so keep black, but ensure it's on top */
.modal-content :focus-visible {
    outline-color: var(--black);
}

/* Ensure focus is visible on specific interactive elements */
a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
[tabindex]:not([tabindex="-1"]):focus-visible {
    outline: 3px solid var(--black);
    outline-offset: 2px;
}

/* Feature cards custom focus to avoid clipping */
.feature:focus-visible {
    outline: 3px solid var(--black);
    outline-offset: 4px;
}

/* Palette: High-contrast focus for fixed elements over variable backgrounds */
/* Uses a double-ring strategy (black outline + white shadow) to ensure visibility */
.newsletter-button:focus-visible,
.back-to-top:focus-visible,
.skip-link:focus-visible {
    outline: 3px solid var(--black);
    outline-offset: 2px;
    box-shadow: 0 0 0 5px var(--white);
}

/* Screen reader only utility */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* Palette: Responsive positioning for Skip Link on mobile */
@media (max-width: 720px) {
    .skip-link:focus {
        top: 20vw; /* Matches the responsive header height logic used in scroll-padding */
    }
}