/**
 * Animation & Motion System
 *
 * All animations respect prefers-reduced-motion.
 *
 * @package merasx
 */

/* ==========================================================================
   Scroll Reveal System
   ========================================================================== */

/**
 * Elements with .mx-reveal are invisible by default.
 * The IntersectionObserver in main.js adds .is-visible when in viewport.
 * JS also adds data-mx-delay="N" (0–4) for staggered children.
 */

.mx-reveal {
    opacity: 0;
    transform: translateY(24px);
    transition:
        opacity 0.7s var(--mx-ease),
        transform 0.7s var(--mx-ease);
}

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

/* Stagger delays — assigned via data-mx-delay attribute in templates */
.mx-reveal[data-mx-delay="1"] { transition-delay: 0.1s; }
.mx-reveal[data-mx-delay="2"] { transition-delay: 0.2s; }
.mx-reveal[data-mx-delay="3"] { transition-delay: 0.3s; }
.mx-reveal[data-mx-delay="4"] { transition-delay: 0.4s; }
.mx-reveal[data-mx-delay="5"] { transition-delay: 0.5s; }

/* Horizontal variant */
.mx-reveal--left {
    transform: translateX(-24px);
}

.mx-reveal--left.is-visible {
    transform: translateX(0);
}

.mx-reveal--right {
    transform: translateX(24px);
}

.mx-reveal--right.is-visible {
    transform: translateX(0);
}

/* Scale variant */
.mx-reveal--scale {
    transform: scale(0.96);
}

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

/* ==========================================================================
   Reduced Motion — Disable All Animations
   ========================================================================== */

@media (prefers-reduced-motion: reduce) {
    .mx-reveal,
    .mx-reveal--left,
    .mx-reveal--right,
    .mx-reveal--scale {
        opacity: 1;
        transform: none;
        transition: none;
        animation: none;
    }

    /* Kill all transitions and animations site-wide */
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* ==========================================================================
   Micro-interactions
   ========================================================================== */

/* Gold underline link hover */
.mx-link-underline {
    position: relative;
    display: inline-block;
    color: var(--mx-white);
}

.mx-link-underline::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 1px;
    background-color: var(--mx-gold);
    transition: width var(--mx-duration) var(--mx-ease);
}

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

/* Arrow-right CTA */
.mx-cta-arrow {
    display: inline-flex;
    align-items: center;
    gap: var(--mx-space-2);
    color: var(--mx-gold);
    font-size: var(--mx-text-sm);
    font-weight: 600;
    letter-spacing: var(--mx-tracking-wide);
    transition: gap var(--mx-duration-fast) var(--mx-ease),
                color var(--mx-duration-fast) var(--mx-ease);
}

.mx-cta-arrow:hover {
    gap: var(--mx-space-3);
    color: var(--mx-white);
}

.mx-cta-arrow::after {
    content: '→';
    display: inline-block;
}

/* ==========================================================================
   Gold Shimmer (used on section labels)
   ========================================================================== */

@media (prefers-reduced-motion: no-preference) {
    .mx-gold-shimmer {
        background: linear-gradient(
            90deg,
            var(--mx-gold) 0%,
            #f0cc60 40%,
            var(--mx-gold) 100%
        );
        background-size: 200% auto;
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
        animation: mx-shimmer 3s linear infinite;
    }
}

.mx-gold-shimmer {
    color: var(--mx-gold);
}

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

/* ==========================================================================
   Counter Animation (JS-triggered)
   ========================================================================== */

.mx-metric__value[data-count] {
    font-variant-numeric: tabular-nums;
    /* JS updates the textContent for counting effect */
}

/* ==========================================================================
   Section Entrance
   ========================================================================== */

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

@keyframes mx-fade-in {
    from { opacity: 0; }
    to   { opacity: 1; }
}

@keyframes mx-scale-in {
    from {
        opacity: 0;
        transform: scale(0.96);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* ==========================================================================
   Loading State
   ========================================================================== */

@keyframes mx-pulse {
    0%, 100% { opacity: 1; }
    50%       { opacity: 0.4; }
}

.mx-loading {
    animation: mx-pulse 1.5s ease-in-out infinite;
}

/* ==========================================================================
   Progress Bar (optional page load indicator)
   ========================================================================== */

.mx-progress {
    position: fixed;
    top: 0;
    left: 0;
    height: 2px;
    background-color: var(--mx-gold);
    z-index: calc(var(--mx-z-sticky) + 10);
    transform-origin: left;
    transform: scaleX(0);
    transition: transform 0.1s linear;
}