/* ─── Scroll Reveal Animations ─── */
[data-reveal] {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.7s cubic-bezier(0.25, 0.46, 0.45, 0.94), transform 0.7s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}
[data-reveal="left"] { transform: translateX(-40px); }
[data-reveal="right"] { transform: translateX(40px); }
[data-reveal="scale"] { transform: scale(0.9); }
[data-reveal="up"] { transform: translateY(40px); }
[data-reveal].revealed {
    opacity: 1;
    transform: translate(0) scale(1);
}

/* Stagger children */
[data-stagger] > * {
    opacity: 0;
    transform: translateY(25px);
    transition: opacity 0.5s ease, transform 0.5s ease;
}
[data-stagger] > *.revealed {
    opacity: 1;
    transform: translateY(0);
}

/* ─── Preloader ─── */
.preloader {
    position: fixed;
    inset: 0;
    z-index: 999999;
    background: var(--bw-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity 0.6s ease, visibility 0.6s ease;
}
.preloader.loaded {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}
.preloader__wave {
    width: 60px;
    height: 60px;
    position: relative;
}
.preloader__wave span {
    position: absolute;
    bottom: 0;
    width: 8px;
    background: var(--bw-red);
    border-radius: 4px;
    animation: preloader-wave 1s ease-in-out infinite;
}
.preloader__wave span:nth-child(1) { left: 0; animation-delay: 0s; height: 20px; }
.preloader__wave span:nth-child(2) { left: 14px; animation-delay: 0.1s; height: 35px; }
.preloader__wave span:nth-child(3) { left: 28px; animation-delay: 0.2s; height: 25px; }
.preloader__wave span:nth-child(4) { left: 42px; animation-delay: 0.3s; height: 40px; }

@keyframes preloader-wave {
    0%, 100% { transform: scaleY(1); opacity: 0.5; }
    50% { transform: scaleY(1.8); opacity: 1; }
}

/* ─── Hero Animations ─── */
.hero__badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(220, 38, 38, 0.12);
    border: 1px solid rgba(220, 38, 38, 0.3);
    padding: 8px 20px;
    border-radius: 100px;
    font-size: 0.875rem;
    color: var(--bw-red);
    font-weight: 600;
    margin-bottom: 1.5rem;
    backdrop-filter: blur(8px);
}
.hero__badge-text {
    transition: opacity 0.4s ease, transform 0.4s ease;
}

.hero__cta .btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    border-radius: var(--bw-radius-full);
    font-weight: 700;
    font-size: 1rem;
    text-decoration: none;
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    position: relative;
    overflow: hidden;
}
.btn--primary {
    background: var(--bw-red);
    color: #fff;
    border: 2px solid var(--bw-red);
    box-shadow: 0 0 0 0 rgba(220, 38, 38, 0.4);
}
.btn--primary:hover {
    background: #b91c1c;
    transform: translateY(-2px);
    box-shadow: 0 10px 40px rgba(220, 38, 38, 0.3), 0 0 20px rgba(220, 38, 38, 0.2);
}
.btn--outline {
    background: transparent;
    color: #fff;
    border: 2px solid rgba(255, 255, 255, 0.3);
}
.btn--outline:hover {
    border-color: var(--bw-red);
    color: var(--bw-red);
    transform: translateY(-2px);
    box-shadow: 0 0 20px rgba(220, 38, 38, 0.15);
}
.btn--sm { padding: 10px 24px; font-size: 0.875rem; }

/* Scroll indicator */
.hero__scroll {
    position: absolute;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: rgba(255, 255, 255, 0.4);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 2px;
}
.hero__scroll-chevron {
    width: 24px;
    height: 24px;
    border-right: 2px solid var(--bw-red);
    border-bottom: 2px solid var(--bw-red);
    transform: rotate(45deg);
    animation: scroll-bounce 2s ease-in-out infinite;
}
@keyframes scroll-bounce {
    0%, 100% { transform: rotate(45deg) translate(0, 0); opacity: 0.4; }
    50% { transform: rotate(45deg) translate(5px, 5px); opacity: 1; }
}

/* ─── Process Timeline ─── */
.process__line {
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--bw-border);
    transform: translateX(-50%);
}
.process__line-fill {
    width: 100%;
    height: 0;
    background: linear-gradient(to bottom, var(--bw-red), var(--bw-orange));
    transition: height 2s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    border-radius: 2px;
}

/* ─── Back to Top ─── */
.back-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 48px;
    height: 48px;
    background: var(--bw-red);
    color: #fff;
    border: none;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    cursor: pointer;
    z-index: 9990;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all 0.3s ease;
    box-shadow: 0 4px 20px rgba(220, 38, 38, 0.3);
}
.back-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}
.back-top:hover {
    background: #b91c1c;
    transform: translateY(-3px);
}

/* ─── Lightbox ─── */
.lightbox {
    position: fixed;
    inset: 0;
    z-index: 99999;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}
.lightbox--open {
    opacity: 1;
    visibility: visible;
}
.lightbox__backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(10px);
}
.lightbox__content {
    position: relative;
    max-width: 900px;
    max-height: 90vh;
    width: 90%;
    background: var(--bw-card-bg);
    border: 1px solid var(--bw-border);
    border-radius: var(--bw-radius-lg);
    overflow-y: auto;
    transform: scale(0.9) translateY(20px);
    transition: transform 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}
.lightbox--open .lightbox__content {
    transform: scale(1) translateY(0);
}
.lightbox__close {
    position: sticky;
    top: 16px;
    float: right;
    margin: 16px;
    width: 40px;
    height: 40px;
    background: rgba(220, 38, 38, 0.1);
    border: 1px solid rgba(220, 38, 38, 0.3);
    border-radius: 50%;
    color: var(--bw-red);
    font-size: 1.5rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1;
    transition: all 0.3s;
}
.lightbox__close:hover { background: var(--bw-red); color: #fff; }
.lightbox__image { width: 100%; aspect-ratio: 16/9; object-fit: cover; }
.lightbox__info { padding: 24px 32px 32px; }
.lightbox__title { font-size: 1.5rem; font-weight: 800; margin-bottom: 8px; }
.lightbox__client { color: var(--bw-text-light); margin-bottom: 12px; }
.lightbox__tech { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 16px; }
.lightbox__tech .tag {
    background: rgba(220, 38, 38, 0.1);
    color: var(--bw-red);
    padding: 4px 12px;
    border-radius: 100px;
    font-size: 0.8rem;
    font-weight: 600;
}
.lightbox__desc { color: var(--bw-text-light); line-height: 1.7; margin-bottom: 20px; }

/* ─── Fade-in for filtered items ─── */
.portfolio-item.fade-in {
    animation: fadeUp 0.5s ease forwards;
}
@keyframes fadeUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ─── Mobile Menu Animations ─── */
.mobile-menu__link {
    opacity: 0;
    transform: translateX(-20px);
    transition: opacity 0.3s ease, transform 0.3s ease;
}
.mobile-menu--open .mobile-menu__link {
    opacity: 1;
    transform: translateX(0);
}
.mobile-menu--open .mobile-menu__link:nth-child(1) { transition-delay: 0.1s; }
.mobile-menu--open .mobile-menu__link:nth-child(2) { transition-delay: 0.15s; }
.mobile-menu--open .mobile-menu__link:nth-child(3) { transition-delay: 0.2s; }
.mobile-menu--open .mobile-menu__link:nth-child(4) { transition-delay: 0.25s; }
.mobile-menu--open .mobile-menu__link:nth-child(5) { transition-delay: 0.3s; }
.mobile-menu--open .mobile-menu__link:nth-child(6) { transition-delay: 0.35s; }
.mobile-menu--open .mobile-menu__link:nth-child(7) { transition-delay: 0.4s; }