/* ==========================================================================
   Animations & Transitions
   ========================================================================== */

/* ---------- Scroll Reveal ---------- */

.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

.reveal-left {
    opacity: 0;
    transform: translateX(-30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal-left.revealed {
    opacity: 1;
    transform: translateX(0);
}

.reveal-right {
    opacity: 0;
    transform: translateX(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal-right.revealed {
    opacity: 1;
    transform: translateX(0);
}

.reveal-scale {
    opacity: 0;
    transform: scale(0.95);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* Stagger children */
.stagger-children > * {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

.stagger-children.revealed > *:nth-child(1) { transition-delay: 0ms; }
.stagger-children.revealed > *:nth-child(2) { transition-delay: 100ms; }
.stagger-children.revealed > *:nth-child(3) { transition-delay: 200ms; }
.stagger-children.revealed > *:nth-child(4) { transition-delay: 300ms; }
.stagger-children.revealed > *:nth-child(5) { transition-delay: 400ms; }
.stagger-children.revealed > *:nth-child(6) { transition-delay: 500ms; }
.stagger-children.revealed > *:nth-child(7) { transition-delay: 600ms; }
.stagger-children.revealed > *:nth-child(8) { transition-delay: 700ms; }
.stagger-children.revealed > *:nth-child(9) { transition-delay: 800ms; }
.stagger-children.revealed > *:nth-child(10) { transition-delay: 900ms; }
.stagger-children.revealed > *:nth-child(11) { transition-delay: 1000ms; }

.stagger-children.revealed > * {
    opacity: 1;
    transform: translateY(0);
}

/* ---------- Keyframe Animations ---------- */

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

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

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

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

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.6;
    }
}

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

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

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

/* ---------- Utility Classes ---------- */

.animate-float {
    animation: float 3s ease-in-out infinite;
}

.animate-pulse {
    animation: pulse 2s ease-in-out infinite;
}

.animate-spin {
    animation: spin 1s linear infinite;
}

/* Hero specific animations */
.hero-fade-in {
    animation: fadeInUp 0.8s ease forwards;
}

.hero-fade-in-delay-1 {
    animation: fadeInUp 0.8s ease 0.2s forwards;
    opacity: 0;
}

.hero-fade-in-delay-2 {
    animation: fadeInUp 0.8s ease 0.4s forwards;
    opacity: 0;
}

.hero-fade-in-delay-3 {
    animation: fadeInUp 0.8s ease 0.6s forwards;
    opacity: 0;
}

/* Grid pattern background */
.bg-grid-pattern {
    background-image:
        linear-gradient(var(--border-subtle) 1px, transparent 1px),
        linear-gradient(90deg, var(--border-subtle) 1px, transparent 1px);
    background-size: 60px 60px;
}

/* Gradient line (for How It Works, Timeline) */
.gradient-line {
    background: var(--gradient-cyan-orange);
    background-size: 200% 200%;
    animation: gradientShift 6s ease infinite;
}

/* Loading spinner */
.spinner {
    width: 24px;
    height: 24px;
    border: 2px solid var(--border-subtle);
    border-top-color: var(--color-cyan);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}