/* Трын-Трава — вступление-трейлер. Оверлей поверх страницы; всё движение — только transform/opacity. */
.intro{position:fixed;inset:0;z-index:100;background:#1b1713;color:var(--paper,#FBF6EA);overflow:hidden;
  font-family:var(--text,"PT Sans",sans-serif);-webkit-user-select:none;user-select:none;
  opacity:1;transition:opacity .8s ease}
.intro.out{opacity:0;pointer-events:none}
html.intro-open{overflow:hidden}
.intro *{box-sizing:border-box}
.intro button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;-webkit-tap-highlight-color:transparent}

/* ---------- сцены ---------- */
.intro-stage{position:absolute;inset:0;perspective:1600px}
.intro-scene{position:absolute;inset:0;opacity:0;will-change:transform,opacity;backface-visibility:hidden;transform-origin:50% 50%}
.intro-scene.live{opacity:1}
.intro-scene img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;display:block;pointer-events:none}
.intro-scene.flip{transform-origin:0 50%}
/* тень на странице при перелистывании */
.intro-scene .shade{position:absolute;inset:0;background:linear-gradient(90deg,rgba(0,0,0,.55),rgba(0,0,0,0) 45%);opacity:0;pointer-events:none}

/* ---------- бумага: зерно и виньетка ---------- */
.intro-grain{position:absolute;inset:-50%;width:200%;height:200%;pointer-events:none;opacity:.16;mix-blend-mode:multiply;
  background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='220' height='220'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 .9 0'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>");
  background-size:220px 220px;will-change:transform}
.intro-vignette{position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(ellipse at 50% 45%,rgba(0,0,0,0) 48%,rgba(27,23,19,.55) 100%)}
.intro-shadow{position:absolute;left:0;right:0;bottom:0;height:52%;pointer-events:none;
  background:linear-gradient(180deg,rgba(27,23,19,0),rgba(27,23,19,.55) 55%,rgba(27,23,19,.78))}

/* ---------- титры ---------- */
.intro-cap{position:absolute;left:0;right:0;bottom:calc(18% + env(safe-area-inset-bottom,0px));padding:0 24px;text-align:center;pointer-events:none;
  font-family:var(--title,"Yeseva One",serif);font-size:clamp(26px,7.2vw,58px);line-height:1.12;color:#FBF6EA;
  text-shadow:0 2px 0 rgba(27,23,19,.8),0 0 18px rgba(27,23,19,.9),0 6px 24px rgba(0,0,0,.6);
  text-wrap:balance}
.intro-cap span{display:inline-block;opacity:0;transform:translateY(.35em);will-change:transform,opacity;margin-right:.26em}
.intro-cap span:last-child{margin-right:0}

/* финальный титул */
.intro-title{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px;padding:0 20px;
  text-align:center;pointer-events:none;opacity:0;will-change:transform,opacity}
.intro-title h1{font-family:var(--title,"Yeseva One",serif);font-weight:400;font-size:clamp(54px,15vw,150px);line-height:.95;margin:0;color:#FBF6EA;
  text-shadow:0 3px 0 rgba(27,23,19,.85),0 0 30px rgba(27,23,19,.9),0 10px 40px rgba(0,0,0,.7);letter-spacing:.01em}
.intro-title p{font-family:var(--narrow,"PT Sans Narrow",sans-serif);text-transform:uppercase;letter-spacing:.16em;max-width:22em;font-size:clamp(13px,2.4vw,20px);
  margin:0;color:#F3EBD9;text-shadow:0 1px 0 rgba(27,23,19,.9),0 0 14px rgba(27,23,19,.9)}
.intro-title .rule{width:min(60vw,260px);height:2px;background:#FBF6EA;opacity:.8;margin:6px 0;box-shadow:0 0 10px rgba(27,23,19,.8)}

/* ---------- управление ---------- */
.intro-ui{position:absolute;inset:0;pointer-events:none}
.intro-ui > *{pointer-events:auto}
.intro-skip,.intro-sound{position:absolute;top:calc(14px + env(safe-area-inset-top,0px));min-height:40px;padding:6px 14px;border-radius:999px;
  background:rgba(27,23,19,.55);border:1.5px solid rgba(251,246,234,.55);color:#FBF6EA;font-weight:700;font-size:14px;
  display:inline-flex;align-items:center;gap:8px;backdrop-filter:blur(4px);-webkit-backdrop-filter:blur(4px);transition:background .15s,opacity .4s}
.intro-skip:hover,.intro-sound:hover{background:rgba(27,23,19,.8)}
.intro-skip{right:14px}
.intro-sound{left:14px;width:40px;padding:0;justify-content:center}
.intro-sound svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.intro-sound .wave{transition:opacity .2s}
.intro-sound.off .wave{opacity:0}
.intro-sound.off .cross{opacity:1}
.intro-sound .cross{opacity:0;transition:opacity .2s}
.intro-sound[hidden]{display:none}
.intro-progress{position:absolute;left:0;right:0;bottom:0;height:3px;background:rgba(251,246,234,.18)}
.intro-progress i{display:block;height:100%;background:#FBF6EA;transform-origin:0 50%;transform:scaleX(0);will-change:transform}

/* ---------- постер (заставка перед стартом) ---------- */
.intro-poster{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:flex-end;padding:0 20px calc(44px + env(safe-area-inset-bottom,0px));
  text-align:center;transition:opacity .6s;background:#1b1713}
.intro-poster.out{opacity:0;pointer-events:none}
.intro-poster .pic{position:absolute;inset:0;background:url(/art/cover.jpg) 38% 50%/cover no-repeat;opacity:.92;
  animation:intro-breathe 14s ease-in-out infinite alternate;will-change:transform}
@keyframes intro-breathe{from{transform:scale(1)}to{transform:scale(1.07)}}
.intro-poster .dim{position:absolute;inset:0;background:linear-gradient(180deg,rgba(27,23,19,.25),rgba(27,23,19,0) 30%,rgba(27,23,19,.35) 60%,rgba(27,23,19,.9))}
.intro-poster .body{position:relative;display:flex;flex-direction:column;align-items:center;gap:12px;max-width:560px;width:100%}
.intro-poster .kicker{font-family:var(--narrow,"PT Sans Narrow",sans-serif);text-transform:uppercase;letter-spacing:.24em;font-size:13px;color:#F3EBD9;
  text-shadow:0 1px 0 rgba(27,23,19,.9)}
.intro-poster h1{font-family:var(--title,"Yeseva One",serif);font-weight:400;font-size:clamp(48px,13vw,110px);line-height:.95;margin:0 0 6px;color:#FBF6EA;
  text-shadow:0 3px 0 rgba(27,23,19,.85),0 0 24px rgba(27,23,19,.9),0 10px 36px rgba(0,0,0,.7)}
.intro-poster .play{min-height:58px;padding:12px 30px;border-radius:14px;background:#FBF6EA;color:#2A2521;border:2px solid #2A2521;
  font-weight:700;font-size:19px;display:inline-flex;align-items:center;gap:10px;box-shadow:5px 5px 0 rgba(42,37,33,.9);transition:transform .08s,opacity .2s;width:100%;max-width:360px;justify-content:center}
.intro-poster .play:active{transform:translate(2px,2px);box-shadow:3px 3px 0 rgba(42,37,33,.9)}
.intro-poster .play[disabled]{opacity:.75;cursor:progress}
.intro-poster .play svg{width:20px;height:20px;fill:currentColor;flex:none}
.intro-poster .play .bar{position:absolute;left:0;bottom:0;height:4px;background:#4C8238;transform-origin:0 50%;transform:scaleX(0);transition:transform .25s}
.intro-poster .play{position:relative;overflow:hidden}
.intro-poster .skip{min-height:40px;padding:6px 16px;border-radius:999px;color:#F3EBD9;font-size:15px;text-decoration:underline;text-underline-offset:3px;opacity:.9}
.intro-poster .note{font-size:13px;color:#CFC4B0;margin:2px 0 0}

@media (min-width:900px){
  .intro-cap{bottom:16%;padding:0 10vw;font-size:clamp(40px,4.2vw,64px)}
  .intro-poster{justify-content:center;padding-bottom:0}
  .intro-poster .body{gap:14px}
  .intro-poster .play{width:auto;padding:12px 38px}
  .intro-skip,.intro-sound{top:18px;font-size:15px}
  .intro-skip{right:22px} .intro-sound{left:22px}
}

/* кнопка повторного просмотра на экране входа */
.facts .intro-btn{align-self:center;margin-left:auto}

/* без движения камеры — только смена кадров */
@media (prefers-reduced-motion:reduce){
  .intro-poster .pic{animation:none}
  .intro-cap span{transform:none}
}

/* ---------- вертикальный экран: рисунок 3:2 показываем целиком, в рамке; за ним — он же, размытый ---------- */
@media (orientation:portrait){
  .intro-scene{background:#1B1713;overflow:hidden;--top:calc(50vh - 33.35vw - 13vh)}
  .intro-scene::before{content:"";position:absolute;inset:-48px;background:var(--bg) center/cover;filter:blur(24px) brightness(.5) saturate(.85)}
  .intro-scene img{inset:auto;left:0;right:0;top:var(--top);width:100%;height:66.7vw;object-fit:cover;object-position:center !important;
    box-shadow:0 0 0 3px #FBF6EA,0 14px 40px rgba(0,0,0,.55)}
  .intro-scene .shade{display:none}
  .intro-cap{bottom:auto;top:calc(50vh + 33.35vw - 13vh + 30px);padding:0 20px;font-size:clamp(26px,8vw,44px)}
  .intro-title{justify-content:flex-start;padding-top:calc(50vh + 33.35vw - 13vh + 26px)}
}