/* ============================================================
 *  Animated "RoboCloth" header title (js/title_anim.js)
 *  The word is pieced from real fabric patches (the launch video's closing title):
 *  media/title/ holds the renders (see media/title/title.json).
 *
 *  Light-page renders v2 (theme "light", web_title.py build-light2): the word alone, no
 *  backdrop / shadow / glow, graded for contrast on a white page, crisp dark outline;
 *  1x (lit.webp, sweep/) and 2x (lit_2x.webp, sweep2x/, picked on devicePixelRatio > 1.3).
 *  Geometry in units of the letters' box (W = word width, H = word height, W/H = 6.6888):
 *    stage   x -0.0107 .. 1.0114 W,  y -0.72 .. 1.0701 H   (lamp band above the word)
 *    still   x -0.0107 .. 1.0114 W,  y -0.0714 .. 1.0701 H (lit.webp, the sweep frames)
 *  -> stage aspect 3.8193; the still is the bottom 63.77 %.
 *  (light v1 with cast shadows: media/title/light_v1/, aspect 3.4799, top 32.98 %, height 67.02 %;
 *   the dark renders: media/title/dark/, aspect 3.654, top 30.53 %, height 69.47 %)
 * ============================================================ */

.jumbotron.has-title-anim { padding-top: 1.4rem; }

.title-anim {
    position: relative;
    display: block;
    width: min(590px, 90vw);
    aspect-ratio: 3.8193;
    margin: 0 auto 0.55rem;
    user-select: none;
    -webkit-user-select: none;
    -webkit-tap-highlight-color: transparent;
    touch-action: pan-y;          /* horizontal drags scrub, vertical drags still scroll */
}

.title-anim .title-lit {
    position: absolute;
    left: 0;
    width: 100%;
    top: 36.23%;
    height: 63.77%;
    display: block;
    pointer-events: none;
}

.title-anim canvas,
.title-anim video {
    position: absolute;
    display: block;
    pointer-events: none;
}

/* JS mode: the canvas draws everything; the <img> is the no-JS / reduced-motion /
 * fallback state.  If the script never starts, the lit word fades in after 3.5 s. */
.title-anim.ta-pending .title-lit {
    opacity: 0;
    animation: ta-fallback 0.6s ease 3.5s forwards;
}
.title-anim.ta-running .title-lit { animation: none; opacity: 0; }
.title-anim.ta-static .title-lit { animation: none; opacity: 1; }
@keyframes ta-fallback { to { opacity: 1; } }

.visually-hidden-title {
    position: absolute !important;
    width: 1px; height: 1px;
    padding: 0; margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

@media (max-width: 576px) {
    .jumbotron.has-title-anim { padding-top: 0.6rem; }
    .title-anim { width: min(590px, 92vw); margin-bottom: 0.35rem; }
}

@media (prefers-reduced-motion: reduce) {
    .title-anim.ta-pending .title-lit { animation: none; opacity: 1; }
}