/* ============================================
   SiraAI — Animations & Transitions
   Smooth, calming micro-interactions
   ============================================ */

/* --- 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(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes slideInRight {
    from { opacity: 0; transform: translateX(30px); }
    to { opacity: 1; transform: translateX(0); }
}

@keyframes slideInLeft {
    from { opacity: 0; transform: translateX(-30px); }
    to { opacity: 1; transform: translateX(0); }
}

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

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

@keyframes skeleton-pulse {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-8px); }
}

@keyframes pulse-soft {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

@keyframes gradient-shift {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

@keyframes typing {
    0% { opacity: 0.3; }
    50% { opacity: 1; }
    100% { opacity: 0.3; }
}

@keyframes ripple {
    from { transform: scale(0); opacity: 0.5; }
    to { transform: scale(2.5); opacity: 0; }
}

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

@keyframes breathe {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.03); }
}

/* --- Animation Utility Classes --- */
.animate-fadeIn { animation: fadeIn 0.5s ease-out; }
.animate-fadeInUp { animation: fadeInUp 0.5s ease-out; }
.animate-fadeInDown { animation: fadeInDown 0.3s ease-out; }
.animate-slideInRight { animation: slideInRight 0.4s ease-out; }
.animate-slideInLeft { animation: slideInLeft 0.4s ease-out; }
.animate-scaleIn { animation: scaleIn 0.3s ease-out; }
.animate-float { animation: float 4s ease-in-out infinite; }
.animate-pulse { animation: pulse-soft 2s ease-in-out infinite; }
.animate-breathe { animation: breathe 3s ease-in-out infinite; }

/* Stagger children animations */
.stagger-children > * {
    opacity: 0;
    animation: fadeInUp 0.5s ease-out forwards;
}

.stagger-children > *:nth-child(1) { animation-delay: 0.05s; }
.stagger-children > *:nth-child(2) { animation-delay: 0.1s; }
.stagger-children > *:nth-child(3) { animation-delay: 0.15s; }
.stagger-children > *:nth-child(4) { animation-delay: 0.2s; }
.stagger-children > *:nth-child(5) { animation-delay: 0.25s; }
.stagger-children > *:nth-child(6) { animation-delay: 0.3s; }
.stagger-children > *:nth-child(7) { animation-delay: 0.35s; }
.stagger-children > *:nth-child(8) { animation-delay: 0.4s; }
.stagger-children > *:nth-child(9) { animation-delay: 0.45s; }
.stagger-children > *:nth-child(10) { animation-delay: 0.5s; }

/* Page transition */
.page-transition {
    animation: fadeInUp 0.35s ease-out;
}

/* Hover effects */
.hover-lift {
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.hover-lift:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.hover-glow {
    transition: box-shadow var(--transition-base);
}

.hover-glow:hover {
    box-shadow: var(--shadow-glow);
}

/* Typing indicator */
.typing-indicator {
    display: flex;
    gap: 4px;
    align-items: center;
    padding: var(--space-3) var(--space-4);
}

.typing-indicator span {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--gray-400);
    animation: typing 1.2s ease-in-out infinite;
}

.typing-indicator span:nth-child(2) { animation-delay: 0.2s; }
.typing-indicator span:nth-child(3) { animation-delay: 0.4s; }

/* Gradient animation for hero */
.gradient-animated {
    background-size: 200% 200%;
    animation: gradient-shift 6s ease infinite;
}

/* Scroll reveal (triggered by Intersection Observer) */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.revealed {
    opacity: 1;
    transform: translateY(0);
}

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

    .reveal { opacity: 1; transform: none; }
}