/* ==========================================================================
   Video Transition (Saul Bass) — utilisable sur toutes les pages
   ========================================================================== */

/* Fallback variables si la page n'a pas la palette Saul Bass définie */
:root {
    --vt-black: var(--sb-black, #0a0a0a);
    --vt-red: var(--sb-red, #c0392b);
    --vt-cream: var(--sb-cream, #e8e4dc);
    --vt-font-saul: var(--font-saul, 'Saul', 'Saul Bass', 'Bebas Neue', Impact, sans-serif);
}

.sb-video-transition {
    position: fixed;
    inset: 0;
    z-index: 9999;
    pointer-events: none;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.sb-video-transition .sb-vt-bg {
    position: absolute;
    inset: 0;
    background: var(--vt-black);
    transform: scaleY(0);
    transform-origin: center;
    animation: sb-vt-bg 0.6s cubic-bezier(0.76, 0, 0.24, 1) forwards;
}

.sb-video-transition .sb-vt-red {
    position: absolute;
    width: 120%;
    height: 120%;
    background: var(--vt-red);
    transform: skewX(-15deg) scaleX(0);
    transform-origin: left;
    animation: sb-vt-red 0.4s 0.2s cubic-bezier(0.76, 0, 0.24, 1) forwards;
}

.sb-video-transition .sb-vt-title {
    position: relative;
    z-index: 2;
    font-family: var(--vt-font-saul);
    font-size: clamp(3rem, 10vw, 8rem);
    color: var(--vt-cream);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    opacity: 0;
    transform: translateY(20px);
    animation: sb-vt-title 0.4s 0.5s ease forwards;
    text-align: center;
    line-height: 1;
}

.sb-video-transition .sb-vt-line {
    position: absolute;
    bottom: 45%;
    left: 10%;
    right: 10%;
    height: 3px;
    background: var(--vt-red);
    transform: scaleX(0);
    animation: sb-vt-line 0.3s 0.7s ease forwards;
}

@keyframes sb-vt-bg {
    0% { transform: scaleY(0); }
    100% { transform: scaleY(1); }
}

@keyframes sb-vt-red {
    0% { transform: skewX(-15deg) scaleX(0); }
    100% { transform: skewX(-15deg) scaleX(1); opacity: 0.12; }
}

@keyframes sb-vt-title {
    0% { opacity: 0; transform: translateY(20px); }
    100% { opacity: 1; transform: translateY(0); }
}

@keyframes sb-vt-line {
    0% { transform: scaleX(0); }
    100% { transform: scaleX(1); }
}

.sb-video-transition.sb-vt-out .sb-vt-bg {
    animation: sb-vt-bg-out 0.4s ease forwards;
}

.sb-video-transition.sb-vt-out .sb-vt-title {
    animation: sb-vt-title-out 0.3s ease forwards;
}

@keyframes sb-vt-bg-out {
    0% { transform: scaleY(1); }
    100% { transform: scaleY(0); }
}

@keyframes sb-vt-title-out {
    0% { opacity: 1; }
    100% { opacity: 0; transform: translateY(-20px); }
}

@media (prefers-reduced-motion: reduce) {
    .sb-video-transition,
    .sb-video-transition * {
        animation-duration: 0.01s !important;
    }
}