/* ============================================
   VOST — Animations
   Keyframes, Reveal, Motion
   ============================================ */

/* ---- Keyframes ---- */

@keyframes glowPulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

@keyframes glowExpand {
    from {
        opacity: 0;
        transform: scale(0.5);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes scrollLine {
    0% {
        opacity: 0;
        transform: scaleY(0) translateZ(0);
    }
    50% {
        opacity: 1;
        transform: scaleY(1) translateZ(0);
    }
    100% {
        opacity: 0;
        transform: scaleY(0) translateZ(0);
    }
}

@keyframes fadeRise {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(1.05) translateY(10px);
    }
    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

@keyframes barsFlicker {
    0%, 100% { opacity: 0.55; }
    50% { opacity: 0.35; }
}

@keyframes barsGrowDown {
    from {
        transform: scaleY(0);
        opacity: 0;
    }
    to {
        transform: scaleY(1);
        opacity: 1;
    }
}

@keyframes heroSettle {
    from {
        transform: scale(1.02);
    }
    to {
        transform: scale(1);
    }
}

/* ---- Hero Cinematic Entrance Sequence ---- */

/* Light bars appear first — grow from top to bottom */
.hero__bars {
    opacity: 0;
    transform-origin: top center;
    animation: barsGrowDown 1s var(--ease-out-expo) 0.2s forwards;
}

/* Glow starts small and expands */
.hero__glow {
    opacity: 0;
    animation: glowExpand 2s var(--ease-out-expo) 0.4s forwards;
}

/* Subtle zoom settle on hero content — visible by default for LCP */
.hero__logo {
    animation: scaleIn 1s var(--ease-out-expo) 0.6s both;
}

.hero__tagline {
    opacity: 0;
    animation: fadeIn 0.8s var(--ease-out-expo) 1s forwards;
}

.hero__authors {
    opacity: 0;
    animation: fadeIn 0.8s var(--ease-out-expo) 1.4s forwards;
}

.hero__scroll {
    opacity: 0;
    animation: fadeIn 0.6s var(--ease-out-expo) 2.2s forwards;
}

/* ---- Scroll Reveal (default: translateY + fade) ---- */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity var(--duration-slow) var(--ease-out-expo),
                transform var(--duration-slow) var(--ease-out-expo);
}

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

/* ---- Reveal Variants ---- */

/* Slide from left */
.reveal--slide-left {
    transform: translateX(-40px) translateY(0);
}

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

/* Slide from right */
.reveal--slide-right {
    transform: translateX(40px) translateY(0);
}

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

/* Scale up */
.reveal--scale {
    transform: scale(0.92) translateY(0);
}

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

/* Clip wipe (horizontal reveal) */
.reveal--clip {
    transform: translateY(0);
    clip-path: inset(0 100% 0 0);
    transition: opacity var(--duration-slow) var(--ease-out-expo),
                clip-path var(--duration-slower) var(--ease-out-expo),
                transform var(--duration-slow) var(--ease-out-expo);
}

.reveal--clip.is-visible {
    clip-path: inset(0 0 0 0);
}

/* ---- Stagger (non-linear timing) ---- */
.reveal-stagger > .reveal:nth-child(1) { transition-delay: 0s; }
.reveal-stagger > .reveal:nth-child(2) { transition-delay: 0.1s; }
.reveal-stagger > .reveal:nth-child(3) { transition-delay: 0.25s; }
.reveal-stagger > .reveal:nth-child(4) { transition-delay: 0.4s; }
.reveal-stagger > .reveal:nth-child(5) { transition-delay: 0.55s; }

.reveal--d1 { transition-delay: 0.1s; }
.reveal--d2 { transition-delay: 0.2s; }
.reveal--d3 { transition-delay: 0.3s; }
.reveal--d4 { transition-delay: 0.4s; }

/* ---- Blur reveal (ligne par ligne) ---- */
.blur-reveal .line {
    opacity: 0;
    filter: blur(6px);
    transform: translateY(6px);
    transition: opacity 0.6s var(--ease-out-expo),
                filter 0.6s var(--ease-out-expo),
                transform 0.6s var(--ease-out-expo);
}

.blur-reveal.is-visible .line:nth-child(1) { transition-delay: 0s; }
.blur-reveal.is-visible .line:nth-child(2) { transition-delay: 0.15s; }
.blur-reveal.is-visible .line:nth-child(3) { transition-delay: 0.3s; }
.blur-reveal.is-visible .line:nth-child(4) { transition-delay: 0.45s; }
.blur-reveal.is-visible .line:nth-child(5) { transition-delay: 0.6s; }
.blur-reveal.is-visible .line:nth-child(6) { transition-delay: 0.75s; }

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

/* ---- Parallax ---- */
[data-parallax] {
    will-change: transform;
}

/* ---- Divider glow animation ---- */
.divider--glow {
    opacity: 0.4;
    transition: opacity var(--duration-slower) var(--ease-out-expo);
}

.divider--glow.is-visible {
    opacity: 1;
}

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

    .reveal,
    .reveal--slide-left,
    .reveal--slide-right,
    .reveal--scale,
    .reveal--clip,
    .blur-reveal .line {
        opacity: 1;
        transform: none;
        filter: none;
        clip-path: none;
    }

    .highlight-draw::before,
    .punchline__highlight::after {
        width: 100%;
    }

    .role__viewfinder .vf-corner {
        stroke-dashoffset: 0;
    }

    .hero__logo,
    .hero__tagline,
    .hero__authors,
    .hero__scroll,
    .hero__bars,
    .hero__glow {
        opacity: 1;
        transform: none;
    }

    .divider--glow {
        opacity: 1;
    }
}