/* ============================================================================
   ATLATECH SRL — ANIMATIONS
   ----------------------------------------------------------------------------
   Keyframes + classi animation utility: reveal on scroll, stagger,
   morphing shapes, floating, pulse, gradient shift.
   ============================================================================ */

/* ========== REVEAL ON SCROLL (IntersectionObserver) ========== */
[data-reveal] {
    opacity: 0;
    transform: translateY(32px);
    transition:
        opacity 0.9s var(--ease-out),
        transform 0.9s var(--ease-out);
    will-change: transform, opacity;
}
[data-reveal].is-visible {
    opacity: 1;
    transform: translateY(0);
}

[data-reveal="fade"] { transform: none; }
[data-reveal="left"] { transform: translateX(-40px); }
[data-reveal="left"].is-visible { transform: translateX(0); }
[data-reveal="right"] { transform: translateX(40px); }
[data-reveal="right"].is-visible { transform: translateX(0); }
[data-reveal="scale"] { transform: scale(0.92); }
[data-reveal="scale"].is-visible { transform: scale(1); }
[data-reveal="blur"] {
    filter: blur(12px);
    opacity: 0;
}
[data-reveal="blur"].is-visible {
    filter: blur(0);
    opacity: 1;
}

/* Stagger — ritarda figli progressivamente */
[data-stagger] > * {
    opacity: 0;
    transform: translateY(24px);
    transition:
        opacity 0.7s var(--ease-out),
        transform 0.7s var(--ease-out);
}
[data-stagger].is-visible > *    { opacity: 1; transform: translateY(0); }
[data-stagger].is-visible > *:nth-child(1) { transition-delay: 0s; }
[data-stagger].is-visible > *:nth-child(2) { transition-delay: 0.08s; }
[data-stagger].is-visible > *:nth-child(3) { transition-delay: 0.16s; }
[data-stagger].is-visible > *:nth-child(4) { transition-delay: 0.24s; }
[data-stagger].is-visible > *:nth-child(5) { transition-delay: 0.32s; }
[data-stagger].is-visible > *:nth-child(6) { transition-delay: 0.40s; }
[data-stagger].is-visible > *:nth-child(7) { transition-delay: 0.48s; }
[data-stagger].is-visible > *:nth-child(8) { transition-delay: 0.56s; }
[data-stagger].is-visible > *:nth-child(n+9) { transition-delay: 0.64s; }

/* ========== KEYFRAMES ========== */
@keyframes fadeIn {
    from { opacity: 0; }
    to   { opacity: 1; }
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(20px); }
    to   { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInDown {
    from { opacity: 0; transform: translateY(-20px); }
    to   { opacity: 1; transform: translateY(0); }
}

@keyframes slideInLeft {
    from { opacity: 0; transform: translateX(-40px); }
    to   { opacity: 1; transform: translateX(0); }
}

@keyframes slideInRight {
    from { opacity: 0; transform: translateX(40px); }
    to   { opacity: 1; transform: translateX(0); }
}

@keyframes scaleIn {
    from { opacity: 0; transform: scale(0.92); }
    to   { opacity: 1; transform: scale(1); }
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50%      { transform: translateY(-12px); }
}

@keyframes floatSlow {
    0%, 100% { transform: translate(0, 0) rotate(0deg); }
    33%      { transform: translate(15px, -20px) rotate(3deg); }
    66%      { transform: translate(-15px, 10px) rotate(-2deg); }
}

@keyframes pulse {
    0%, 100% { opacity: 0.55; transform: scale(1); }
    50%      { opacity: 1;    transform: scale(1.08); }
}

@keyframes pulseGlow {
    0%, 100% { box-shadow: 0 0 0 0 var(--color-primary-glow); }
    50%      { box-shadow: 0 0 0 12px transparent; }
}

@keyframes shimmer {
    0%   { background-position: -200% 50%; }
    100% { background-position: 200% 50%; }
}

@keyframes gradientShift {
    0%, 100% { background-position: 0% 50%; }
    50%      { background-position: 100% 50%; }
}

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

@keyframes rotate {
    from { transform: rotate(0deg); }
    to   { transform: rotate(360deg); }
}

@keyframes morph {
    0%, 100% { border-radius: 63% 37% 54% 46% / 55% 48% 52% 45%; }
    25%      { border-radius: 40% 60% 65% 35% / 40% 55% 45% 60%; }
    50%      { border-radius: 54% 46% 38% 62% / 49% 70% 30% 51%; }
    75%      { border-radius: 57% 43% 50% 50% / 62% 35% 65% 38%; }
}

@keyframes blobFloat {
    0%, 100% { transform: translate(0, 0) scale(1); }
    25%      { transform: translate(30px, -20px) scale(1.05); }
    50%      { transform: translate(-20px, 30px) scale(0.95); }
    75%      { transform: translate(-30px, -15px) scale(1.02); }
}

@keyframes typing {
    from { width: 0; }
    to   { width: 100%; }
}

@keyframes blinkCaret {
    50% { border-color: transparent; }
}

@keyframes scrollIndicator {
    0%   { opacity: 0; transform: translate(-50%, 0); }
    30%  { opacity: 1; }
    100% { opacity: 0; transform: translate(-50%, 16px); }
}

@keyframes marquee {
    from { transform: translateX(0); }
    to   { transform: translateX(-50%); }
}

/* ========== CLASSI ANIMATE UTILITY ========== */
.anim-fade-in     { animation: fadeIn     0.8s var(--ease-out) both; }
.anim-fade-in-up  { animation: fadeInUp   0.8s var(--ease-out) both; }
.anim-slide-left  { animation: slideInLeft 0.8s var(--ease-out) both; }
.anim-slide-right { animation: slideInRight 0.8s var(--ease-out) both; }
.anim-scale       { animation: scaleIn    0.6s var(--ease-spring) both; }
.anim-float       { animation: float       5s var(--ease-standard) infinite; }
.anim-float-slow  { animation: floatSlow  14s var(--ease-standard) infinite; }
.anim-pulse       { animation: pulse       3s var(--ease-standard) infinite; }
.anim-pulse-glow  { animation: pulseGlow   2s var(--ease-standard) infinite; }
.anim-spin        { animation: spin       20s linear infinite; }
.anim-morph       { animation: morph      18s var(--ease-standard) infinite; }
.anim-blob        { animation: blobFloat  20s var(--ease-standard) infinite; }

/* Shimmer text */
.anim-shimmer {
    background: linear-gradient(
        90deg,
        var(--color-text-muted) 0%,
        var(--color-primary) 20%,
        var(--color-text) 50%,
        var(--color-primary) 80%,
        var(--color-text-muted) 100%
    );
    background-size: 200% 100%;
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    color: transparent;
    animation: shimmer 6s linear infinite;
}

.gradient-animated {
    background: linear-gradient(
        90deg,
        var(--color-primary),
        var(--color-accent-1),
        var(--color-accent-2),
        var(--color-primary)
    );
    background-size: 300% 100%;
    animation: gradientShift 8s var(--ease-standard) infinite;
}

/* Scroll indicator (hero) */
.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    width: 26px;
    height: 42px;
    border: 2px solid var(--color-border-strong);
    border-radius: var(--r-full);
    pointer-events: none;
}
.scroll-indicator::after {
    content: '';
    position: absolute;
    left: 50%;
    top: 8px;
    width: 4px;
    height: 8px;
    margin-left: -2px;
    background: var(--color-primary);
    border-radius: var(--r-full);
    animation: scrollIndicator 2.4s var(--ease-out) infinite;
}

/* Delay utilities */
.delay-100 { animation-delay: 0.1s; }
.delay-200 { animation-delay: 0.2s; }
.delay-300 { animation-delay: 0.3s; }
.delay-400 { animation-delay: 0.4s; }
.delay-500 { animation-delay: 0.5s; }
.delay-700 { animation-delay: 0.7s; }
.delay-1000 { animation-delay: 1s; }