/* ═══════════════════════════════════════════════════════════
   Enterprise polish — micro-interactions & accessibility
   (No design system changes — refinement only)
   ═══════════════════════════════════════════════════════════ */

/* Focus — keyboard navigation */
.sit-nav__link:focus-visible,
.sit-footer__links a:focus-visible,
.sit-filter-btn:focus-visible,
.sit-faq__question:focus-visible,
.sit-linkedin-link:focus-visible,
.sit-case-link:focus-visible,
.sit-project-card__cta:focus-visible,
.sit-bento__link:focus-visible {
    outline: 2px solid var(--accent-cyan);
    outline-offset: 3px;
    border-radius: var(--radius-sm);
}

.sit-page-form__group input:focus-visible,
.sit-page-form__group textarea:focus-visible,
.sit-page-form__group select:focus-visible {
    outline: none;
    border-color: var(--accent-cyan);
    box-shadow: 0 0 0 3px rgba(34, 211, 238, 0.2);
}

.sit-nav__toggle:focus-visible {
    outline: 2px solid var(--accent-cyan);
    outline-offset: 3px;
    border-radius: var(--radius-sm);
}

/* Button loading */
.sit-btn.is-loading {
    pointer-events: none;
    opacity: 0.75;
    position: relative;
}

.sit-btn.is-loading::after {
    content: '';
    width: 14px;
    height: 14px;
    margin-left: var(--space-2);
    border: 2px solid currentColor;
    border-right-color: transparent;
    border-radius: 50%;
    animation: sit-spin 0.6s linear infinite;
    display: inline-block;
    vertical-align: middle;
}

@keyframes sit-spin {
    to { transform: rotate(360deg); }
}

/* Contact trust */
.sit-contact-assurance {
    list-style: none;
    margin: 0 0 var(--space-8);
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.sit-contact-assurance li {
    display: flex;
    align-items: flex-start;
    gap: var(--space-3);
    font-size: var(--text-sm);
    color: var(--text-secondary);
    line-height: 1.5;
}

.sit-contact-assurance li::before {
    content: '✓';
    color: var(--accent-cyan);
    font-weight: 700;
    flex-shrink: 0;
}

.sit-form-hint {
    font-size: var(--text-xs);
    color: var(--text-muted);
    margin-top: var(--space-2);
    line-height: 1.45;
}

.sit-form-trust {
    font-size: var(--text-xs);
    color: var(--text-muted);
    text-align: center;
    margin-top: var(--space-4);
    line-height: 1.5;
}

.sit-form-honeypot {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.sit-alert[role="status"] {
    animation: sit-fade-in 0.4s var(--ease-out);
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: var(--space-4);
}

.sit-alert__dismiss {
    flex-shrink: 0;
    width: 2rem;
    height: 2rem;
    border: none;
    border-radius: var(--radius-md);
    background: transparent;
    color: var(--text-muted);
    font-size: 1.25rem;
    line-height: 1;
    cursor: pointer;
    transition: color var(--duration-base), background var(--duration-base);
}

.sit-alert[role="status"] p {
    flex: 1;
    margin: 0;
}

@keyframes sit-fade-in {
    from { opacity: 0; transform: translateY(-6px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Portfolio card CTA */
.sit-project-card__cta {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--accent-cyan);
    margin-top: var(--space-2);
    transition: gap var(--duration-base);
}

.sit-project-card:hover .sit-project-card__cta {
    gap: var(--space-3);
}

.sit-project-card__cta svg {
    flex-shrink: 0;
    transition: transform var(--duration-base);
}

.sit-project-card:hover .sit-project-card__cta svg {
    transform: translateX(3px);
}

.sit-project-card__visual::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, transparent 50%, rgba(5, 5, 8, 0.5) 100%);
    opacity: 0;
    transition: opacity var(--duration-base);
    pointer-events: none;
    z-index: 2;
}

.sit-project-card:hover .sit-project-card__visual::after {
    opacity: 1;
}

/* Filter button — pressed state */
.sit-filter-btn[aria-pressed="true"] {
    border-color: var(--accent-blue);
    background: rgba(59, 130, 246, 0.12);
    color: var(--text-primary);
}

/* Touch targets — mobile */
@media (max-width: 768px) {
    .sit-btn,
    .sit-filter-btn,
    .sit-faq__question {
        min-height: 44px;
    }

    .sit-nav__link {
        min-height: 44px;
        display: inline-flex;
        align-items: center;
    }

    .sit-page-form__group input,
    .sit-page-form__group textarea,
    .sit-page-form__group select {
        font-size: 16px; /* prevents iOS zoom */
    }
}

@media (max-width: 430px) {
    .sit-founder-spotlight__inner {
        gap: var(--space-5);
    }

    .sit-engagement-card,
    .sit-tech-card,
    .sit-quality-item {
        padding: var(--space-5);
    }
}

/* Performance — below-fold content */
.sit-section--lazy {
    content-visibility: auto;
    contain-intrinsic-size: auto 600px;
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    .sit-btn.is-loading::after {
        animation: none;
    }

    .sit-alert[role="status"] {
        animation: none;
    }
}