/* ============================================
   Dr. Eliyar — Animations
   ============================================ */

/* --- Scroll Reveal --- */
.reveal {
    opacity: 0;
    transform: translateY(15px);
    transition: opacity var(--transition-slow), transform var(--transition-slow);
}

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

.reveal--left {
    opacity: 0;
    transform: translateX(-30px);
    transition: opacity var(--transition-slow), transform var(--transition-slow);
}

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

.reveal--right {
    opacity: 0;
    transform: translateX(30px);
    transition: opacity var(--transition-slow), transform var(--transition-slow);
}

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

.reveal--scale {
    opacity: 0;
    transform: scale(0.95);
    transition: opacity var(--transition-slow), transform var(--transition-slow);
}

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

/* Stagger children */
.reveal-stagger>* {
    opacity: 0;
    transform: translateY(15px);
    transition: opacity 0.5s ease-out, transform 0.5s ease-out;
}

.reveal-stagger.visible>*:nth-child(1) {
    transition-delay: 0ms;
}

.reveal-stagger.visible>*:nth-child(2) {
    transition-delay: 80ms;
}

.reveal-stagger.visible>*:nth-child(3) {
    transition-delay: 160ms;
}

.reveal-stagger.visible>*:nth-child(4) {
    transition-delay: 240ms;
}

.reveal-stagger.visible>*:nth-child(5) {
    transition-delay: 320ms;
}

.reveal-stagger.visible>*:nth-child(6) {
    transition-delay: 400ms;
}

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

/* --- Gradient Shimmer --- */
@keyframes shimmer {
    0% {
        background-position: -200% 0;
    }

    100% {
        background-position: 200% 0;
    }
}

.shimmer-text {
    background: linear-gradient(90deg,
            var(--color-text-light) 0%,
            var(--color-primary-hover) 50%,
            var(--color-text-light) 100%);
    background-size: 200% 100%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: shimmer 4s linear infinite;
}

/* --- Floating / Parallax --- */
@keyframes float {

    0%,
    100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-10px);
    }
}

.float {
    animation: float 4s ease-in-out infinite;
}

/* --- Pulse Ring (for online indicator, etc.) --- */
@keyframes pulse-ring {
    0% {
        transform: scale(1);
        opacity: 0.6;
    }

    100% {
        transform: scale(2.2);
        opacity: 0;
    }
}

.pulse-ring {
    position: relative;
}

.pulse-ring::after {
    content: '';
    position: absolute;
    inset: -4px;
    border-radius: 50%;
    border: 2px solid var(--color-success);
    animation: pulse-ring 2s ease-out infinite;
}

/* --- Gradient Background Animation --- */
@keyframes gradient-shift {
    0% {
        background-position: 0% 50%;
    }

    50% {
        background-position: 100% 50%;
    }

    100% {
        background-position: 0% 50%;
    }
}

.gradient-bg {
    background: linear-gradient(135deg, var(--color-bg-dark), #0a1628, var(--color-bg-dark-alt), #0c1a30);
    background-size: 400% 400%;
    animation: gradient-shift 15s ease infinite;
}

/* --- Counter Animation --- */
@keyframes countUp {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* --- Underline Link Hover --- */
.link-hover {
    position: relative;
}

.link-hover::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-primary-hover);
    transition: width var(--transition-base);
}

.link-hover:hover::after {
    width: 100%;
}

/* --- Ripple Effect for Buttons --- */
.btn .ripple {
    position: absolute;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: scale(0);
    animation: ripple-anim 0.6s ease-out;
    pointer-events: none;
}

@keyframes ripple-anim {
    to {
        transform: scale(4);
        opacity: 0;
    }
}

/* --- Skeleton Loading --- */
@keyframes skeleton-pulse {
    0% {
        background-color: rgba(255, 255, 255, 0.04);
    }

    50% {
        background-color: rgba(255, 255, 255, 0.08);
    }

    100% {
        background-color: rgba(255, 255, 255, 0.04);
    }
}

.skeleton {
    animation: skeleton-pulse 1.8s ease-in-out infinite;
    border-radius: var(--radius-sm);
}