/* ============================================================
   KatyaFit — 05 footer + утилиты: footer, scroll-reveal, focus-visible, reduced-motion
   Часть styles.css. Подключается на страницах в фиксированном порядке.
   ============================================================ */

/* ============================================================
   FOOTER — Redesigned (multi-column layout)
   ============================================================ */
.footer {
    background-color: var(--accent-forest);
    color: var(--bg-milk);
    padding: 5rem 0 3rem;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-top {
    display: grid;
    grid-template-columns: 1.6fr 1.4fr 1fr;
    gap: 4rem;
    align-items: start;
    padding-bottom: 4rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    margin-bottom: 2.5rem;
}

.footer-brand {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.footer-logo {
    font-size: 1.25rem;
    font-weight: 800;
    letter-spacing: 2px;
    text-transform: uppercase;
}

.footer-logo span {
    color: var(--accent-coral);
}

.footer-tagline {
    font-size: 0.9rem;
    line-height: 1.7;
    opacity: 0.7;
    color: var(--bg-milk);
}

.footer-socials {
    display: flex;
    gap: 0.75rem;
    margin-top: 0.25rem;
}

.footer-social-btn {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: rgba(247, 245, 240, 0.75);
    transition: var(--transition-fast);
    text-decoration: none;
}

.footer-social-btn:hover {
    background: var(--accent-coral);
    border-color: var(--accent-coral);
    color: var(--bg-pure);
    transform: scale(1.1);
}

.footer-nav {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}

.footer-nav-col {
    display: flex;
    flex-direction: column;
    gap: 0.85rem;
}

.footer-nav-heading {
    font-size: 0.75rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--accent-coral);
    margin-bottom: 0.25rem;
}

.footer-nav a {
    font-size: 0.88rem;
    color: var(--bg-milk);
    opacity: 0.65;
    transition: var(--transition-fast);
    text-decoration: none;
}

.footer-nav a:hover {
    opacity: 1;
    color: var(--accent-coral);
}

.footer-nav a.nav-link--active {
    opacity: 1;
    color: var(--accent-coral);
    font-weight: 600;
}

.footer-cta-block {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
}

.footer-cta-text {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--bg-milk);
    opacity: 0.9;
}

.footer-cta-btn {
    white-space: nowrap;
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.footer-copy {
    font-size: 0.82rem;
    opacity: 0.45;
    color: var(--bg-milk);
}

/* Animations */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(24px); }
    to   { opacity: 1; transform: translateY(0); }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to   { opacity: 1; }
}

/* ============================================================
   SCROLL-REVEAL SYSTEM (Entrance animations with stagger)
   ============================================================ */
.reveal {
    opacity: 0;
    transform: translateY(28px);
    transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1),
                transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal.is-visible {
    opacity: 1;
    transform: translateY(0);
}

/* Stagger delays via CSS custom property */
.reveal[style*="--reveal-delay"] {
    transition-delay: var(--reveal-delay);
}

/* ============================================================
   FOCUS-VISIBLE (Accessible keyboard navigation)
   ============================================================ */
:focus-visible {
    outline: 2px solid var(--accent-coral);
    outline-offset: 3px;
    border-radius: 4px;
}

.btn:focus-visible {
    outline-offset: 4px;
    border-radius: 50px;
}

/* ============================================================
   PREFERS-REDUCED-MOTION (Accessibility baseline)
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
    .reveal {
        opacity: 1;
        transform: none;
    }
    body::after {
        display: none;
    }
}