/* ================================================================
   KITOTOOL — Animations (Vercel/Geist Design System v2.0)
   Version: 2.0 | 2026-04-12
   Subtle, minimal — matching Vercel aesthetic
   ================================================================ */

/* Fade In */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}
.fade-in { animation: fadeIn 0.2s ease both; }

/* Slide Up */
@keyframes slideUp {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}
.slide-up { animation: slideUp 0.25s ease both; }

/* Scale In */
@keyframes scaleIn {
    from { opacity: 0; transform: scale(0.97); }
    to { opacity: 1; transform: scale(1); }
}
.scale-in { animation: scaleIn 0.2s cubic-bezier(0.16, 1, 0.3, 1) both; }

/* Hover lift */
.hover-lift {
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}
.hover-lift:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-elevated);
}

/* Hover scale */
.hover-scale {
    transition: transform var(--transition-fast);
}
.hover-scale:hover {
    transform: scale(1.02);
}

/* Spin */
@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}
.spin { animation: spin 1s linear infinite; }

/* Pulse */
@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}
.pulse { animation: pulse 2s ease-in-out infinite; }

/* Bounce */
@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-6px); }
}
.bounce { animation: bounce 0.5s ease infinite; }

/* Shake */
@keyframes shake {
    0%, 100% { transform: translateX(0); }
    20% { transform: translateX(-6px); }
    40% { transform: translateX(6px); }
    60% { transform: translateX(-3px); }
    80% { transform: translateX(3px); }
}
.shake { animation: shake 0.4s ease; }

/* Confetti */
.confetti-container {
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    pointer-events: none;
    z-index: 9999;
    overflow: hidden;
}

@keyframes confettiFall {
    0% { transform: translateY(-10px) rotateZ(0deg); opacity: 1; }
    100% { transform: translateY(100vh) rotateZ(720deg); opacity: 0; }
}

.confetti-piece {
    position: absolute;
    width: 8px; height: 8px;
    top: -10px;
    animation: confettiFall linear forwards;
}

/* Stagger classes (used with stagger-children) */
.stagger-1 { animation-delay: 50ms; }
.stagger-2 { animation-delay: 100ms; }
.stagger-3 { animation-delay: 150ms; }
.stagger-4 { animation-delay: 200ms; }
.stagger-5 { animation-delay: 250ms; }
.stagger-6 { animation-delay: 300ms; }
.stagger-7 { animation-delay: 350ms; }
.stagger-8 { animation-delay: 400ms; }

/* Gradient text */
.gradient-text {
    background: linear-gradient(135deg, #171717 0%, #4d4d4d 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Toast animation */
@keyframes toastIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}
.toast-in { animation: toastIn 0.2s ease; }

/* ===== SCROLL REVEAL — IntersectionObserver driven ===== */
.reveal {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1),
                transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

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

.reveal-scale {
    opacity: 0;
    transform: scale(0.96);
    transition: opacity 0.5s cubic-bezier(0.16, 1, 0.3, 1),
                transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

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

/* Stagger children when parent becomes visible */
.reveal-stagger > * {
    opacity: 0;
    transform: translateY(16px);
    transition: opacity 0.5s cubic-bezier(0.16, 1, 0.3, 1),
                transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal-stagger.is-visible > *:nth-child(1) { opacity: 1; transform: translateY(0); transition-delay: 0ms; }
.reveal-stagger.is-visible > *:nth-child(2) { opacity: 1; transform: translateY(0); transition-delay: 80ms; }
.reveal-stagger.is-visible > *:nth-child(3) { opacity: 1; transform: translateY(0); transition-delay: 160ms; }
.reveal-stagger.is-visible > *:nth-child(4) { opacity: 1; transform: translateY(0); transition-delay: 240ms; }
.reveal-stagger.is-visible > *:nth-child(5) { opacity: 1; transform: translateY(0); transition-delay: 320ms; }
.reveal-stagger.is-visible > *:nth-child(6) { opacity: 1; transform: translateY(0); transition-delay: 400ms; }
.reveal-stagger.is-visible > *:nth-child(7) { opacity: 1; transform: translateY(0); transition-delay: 480ms; }
.reveal-stagger.is-visible > *:nth-child(8) { opacity: 1; transform: translateY(0); transition-delay: 560ms; }

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    .reveal,
    .reveal-scale,
    .reveal-stagger > * {
        opacity: 1;
        transform: none;
        transition: none;
    }
}