/*
 * Utility Styles - Back to top, scroll progress, focus states, etc.
 */

/* Back to top button */
.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 44px;
    height: 44px;
    min-width: 44px;
    min-height: 44px;
    background: var(--accent);
    border: none;
    border-radius: 10px;
    color: #fff;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transform: translateY(12px);
    transition: opacity 0.3s ease, transform 0.3s ease, background 0.2s;
    pointer-events: none;
    box-shadow: 0 4px 20px var(--accent-glow);
    z-index: 900;
}

.back-to-top.visible {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

.back-to-top:hover {
    background: var(--accent-light);
    transform: translateY(-3px);
    box-shadow: 0 8px 28px var(--accent-glow);
}

.back-to-top:focus-visible {
    outline: 2px solid var(--accent-light);
    outline-offset: 3px;
}

/* Scroll progress bar */
.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    height: 3px;
    width: 0%;
    background: linear-gradient(90deg, var(--accent-dark), var(--accent), var(--accent-light));
    z-index: 1100;
    box-shadow: 0 0 10px var(--accent-glow);
    transition: width 0.08s linear;
    pointer-events: none;
}

/* Touch targets */
.theme-toggle,
.hamburger {
    min-width: 44px;
    min-height: 44px;
    width: 44px;
    height: 44px;
}

.theme-toggle {
    border-radius: 10px;
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    .stat {
        animation: none;
        opacity: 1;
    }

    .back-to-top {
        transition: opacity 0.01ms;
    }
}