/* =====================================================================
   Umrnoma — "sample book" tour (replaces the #book page-flip flipbook)
   Every class is prefixed bt- so nothing collides with .sp/.rv/.wrap/.sec/.hs/.sig/.toc/.tree
   Default (no JS / no GSAP / reduced motion) = simple vertical list of pages.
   .bt-live (added by book-tour.js) = pinned, scroll-driven tour.
   ===================================================================== */
.bt{--bt-paper:#FFFCF5;--bt-cloth1:#561720;--bt-cloth2:#6E1F2A;--bt-cloth3:#4A121A;padding-bottom:0;background:var(--paper)}
.bt-head{text-align:center}
.bt-hint{color:var(--muted);font-size:15px;margin-top:10px}
.bt-hint .bt-ic{display:inline-block;width:18px;height:18px;vertical-align:-4px;margin-right:6px;color:var(--acc)}

/* ---------- shared page look ---------- */
.bt-stack{position:relative;container-type:inline-size;-webkit-tap-highlight-color:transparent}
.bt-pg{position:absolute;top:1.1%;right:2.2%;bottom:2%;left:0;border-radius:2px 5px 5px 2px;-webkit-backface-visibility:hidden;backface-visibility:hidden}
.bt-face{position:absolute;inset:0;border-radius:inherit;overflow:hidden;background:var(--bt-paper);
  background-image:linear-gradient(90deg,rgba(70,30,15,.12) 0,rgba(70,30,15,.035) 3.5%,rgba(70,30,15,0) 9%),radial-gradient(140% 90% at 85% 15%,#FFFEF9 0%,#FFFBF2 55%,#FBF3E4 100%);
  box-shadow:0 1px 2px rgba(60,20,10,.14),inset 0 0 0 1px rgba(120,90,60,.07)}
.bt-pgi{position:absolute;inset:0;display:flex;flex-direction:column;padding:9cqw 7.6cqw 7.5cqw 9.6cqw;font-family:var(--book);color:var(--ink);font-size:15px;font-size:clamp(15px,4.45cqw,18px);line-height:1.55;text-align:left}
.bt-shade{position:absolute;inset:0;border-radius:inherit;background:#2B150D;opacity:0;pointer-events:none;z-index:6}
.bt-sh{position:absolute;inset:0;border-radius:inherit;z-index:-1;box-shadow:0 34px 70px -12px rgba(40,14,6,.5),0 12px 26px rgba(40,14,6,.22);opacity:0;pointer-events:none}

/* small print-like parts */
.bt-rh{font-family:var(--sans);font-size:.6em;font-weight:700;letter-spacing:.24em;text-transform:uppercase;color:#A8968A;text-align:center;line-height:1;margin:-1.2em 0 1.6em}
.bt-orn{display:block;margin:auto auto 0;width:2.4em;height:1em;color:var(--gold)}
.bt-orn svg{width:100%;height:100%;display:block}
.bt-ttl{font-family:var(--serif);font-weight:600;font-size:1.55em;line-height:1.1;text-align:center;color:var(--ink);margin:0 0 .15em;letter-spacing:.01em}
.bt-rule{display:flex;align-items:center;justify-content:center;gap:.6em;color:var(--gold);margin:.35em 0 1em}
.bt-rule::before,.bt-rule::after{content:"";height:1px;width:2.4em;background:currentColor;opacity:.7}
.bt-rule i{width:.36em;height:.36em;transform:rotate(45deg);background:currentColor;display:block}

/* ---------- 0 · cover ---------- */
.bt-pg.bt-cover,.bt-pg.bt-back{inset:0;border-radius:3px 10px 10px 3px}
.bt-cover{transform-style:preserve-3d}
.bt-cloth{color:var(--cream);text-align:center;
  background:radial-gradient(110% 80% at 25% 8%,rgba(255,225,200,.13),rgba(255,225,200,0) 55%),repeating-linear-gradient(0deg,rgba(255,255,255,.022) 0 1px,rgba(255,255,255,0) 1px 3px),repeating-linear-gradient(90deg,rgba(0,0,0,.05) 0 1px,rgba(0,0,0,0) 1px 3px),linear-gradient(140deg,var(--bt-cloth1) 0%,var(--bt-cloth2) 48%,var(--bt-cloth3) 100%);
  box-shadow:inset 0 0 0 1px rgba(0,0,0,.25),inset 0 -14px 30px rgba(0,0,0,.18)}
.bt-cloth::before{content:"";position:absolute;top:0;bottom:0;left:4.2%;width:2.6%;background:linear-gradient(90deg,rgba(0,0,0,.28),rgba(255,255,255,.07) 55%,rgba(0,0,0,0));pointer-events:none}
.bt-frame{position:absolute;inset:5.2cqw 5cqw 5.2cqw 8.4cqw;border:1px solid rgba(231,199,126,.75);border-radius:2px;pointer-events:none}
.bt-frame::after{content:"";position:absolute;inset:1.1cqw;border:.5px solid rgba(231,199,126,.38);border-radius:1px}
.bt-cv{position:absolute;inset:0 0 0 3.4cqw;display:flex;flex-direction:column;align-items:center;padding-top:12cqw}
.bt-cv-photo{position:relative;width:52cqw;height:65cqw;border-radius:26cqw 26cqw 1.2cqw 1.2cqw;padding:1.3cqw;border:1px solid rgba(231,199,126,.85);box-shadow:0 0 0 .7cqw rgba(78,20,27,.6),0 1.6cqw 4cqw rgba(0,0,0,.35)}
.bt-cv-photo i{display:block;width:100%;height:100%;border-radius:25cqw 25cqw .6cqw .6cqw;background:#3a2a22 url(img/cover-mom.jpg) no-repeat;background-size:cover;background-position:55% 22%;filter:sepia(.12) saturate(.92) contrast(.98) brightness(1.03)}
.bt-cv-name{font-family:var(--serif);font-weight:600;font-size:9.6cqw;line-height:1;letter-spacing:.01em;margin-top:6cqw;color:#F6E7CB;text-shadow:0 1px 0 rgba(0,0,0,.25)}
.bt-cv-sub{font-family:var(--serif);font-style:italic;font-weight:500;font-size:5.2cqw;line-height:1;color:var(--gold2);margin-top:2.6cqw}
.bt-cv-heart{width:4.6cqw;height:4.6cqw;color:var(--gold2);margin-top:4.6cqw;animation:btBeat 2.8s ease-in-out infinite}
.bt-cv-place{position:absolute;bottom:9.6cqw;left:0;right:0;font-family:var(--sans);font-weight:700;font-size:2.55cqw;letter-spacing:.32em;text-transform:uppercase;color:rgba(234,214,179,.78)}
.bt-shine{position:absolute;top:-20%;bottom:-20%;left:-60%;width:45%;background:linear-gradient(100deg,rgba(255,240,210,0) 0%,rgba(255,240,210,.13) 45%,rgba(255,240,210,.2) 50%,rgba(255,240,210,.13) 55%,rgba(255,240,210,0) 100%);transform:translateX(0) skewX(-12deg);animation:btShine 7s ease-in-out 1.2s infinite;pointer-events:none}
.bt-cover-in{transform:rotateY(180deg);background:#EFE0C8;background-image:radial-gradient(circle at 50% 50%,rgba(122,36,48,.09) 0 1.2px,transparent 1.6px);background-size:14px 14px;box-shadow:inset -10px 0 18px rgba(0,0,0,.12);-webkit-backface-visibility:hidden;backface-visibility:hidden}
.bt-cover>.bt-face{-webkit-backface-visibility:hidden;backface-visibility:hidden}

/* ---------- 1 · dedication ---------- */
.bt-ded .bt-pgi{justify-content:center;align-items:center;text-align:center;padding-top:6cqw}
.bt-ded .bt-sprig{width:15cqw;height:auto;color:var(--gold);margin-bottom:6cqw}
.bt-ded-t{font-family:var(--serif);font-style:italic;font-weight:500;font-size:1.72em;line-height:1.22;color:var(--ink)}
.bt-ded-n{font-size:.95em;font-style:italic;color:var(--ink2);margin-top:1.3em;max-width:17em;line-height:1.55;text-wrap:balance}
.bt-sig{font-family:Caveat,cursive;font-weight:600;font-size:1.65em;line-height:1.05;color:var(--acc);margin-top:.9em;display:block}

/* ---------- 2 · contents ---------- */
.bt-contents{list-style:none;margin:.2em 0 0;padding:0;flex:1 1 auto;display:flex;flex-direction:column;justify-content:center}
@container (min-width:440px){.bt-contents li{padding:.36em 0}}
.bt-contents li{display:flex;align-items:baseline;gap:.75em;padding:.24em 0;border-bottom:1px dotted #DCCDB6;line-height:1.38}
.bt-contents li:last-child{border-bottom:0}
.bt-contents li i{font-style:normal;flex:0 0 1.9em;text-align:right;font-family:var(--serif);font-weight:600;color:var(--acc);font-size:1.02em}
.bt-contents li.bt-here span{font-weight:600}
.bt-contents li.bt-here::after{content:"";width:.42em;height:.42em;border-radius:50%;background:var(--acc);margin-left:auto;align-self:center;flex:0 0 auto}
.bt-cnote{padding-top:.6em;text-align:center;font-family:var(--serif);font-style:italic;font-size:1.08em;color:var(--ink2)}

/* ---------- 3 · chapter opening ---------- */
.bt-chno{font-family:var(--sans);font-weight:800;font-size:.66em;letter-spacing:.26em;text-transform:uppercase;color:var(--acc);text-align:center;display:flex;align-items:center;justify-content:center;gap:.9em}
.bt-chno::before,.bt-chno::after{content:"";height:1px;width:2.6em;background:var(--gold);opacity:.8}
.bt .bt-chq{font-family:var(--serif);font-weight:600;font-size:1.9em;line-height:1.05;text-align:center;color:var(--ink);margin:.42em 0 .1em;letter-spacing:-.005em;text-wrap:balance}
.bt-asked{font-family:Caveat,cursive;font-weight:600;font-size:1.28em;color:var(--acc);text-align:center;line-height:1.1;margin-bottom:.8em}
.bt-body{margin:0;hyphens:manual;-webkit-hyphens:manual}
@container (max-width:330px){.bt .bt-chq{font-size:1.72em}.bt-asked{margin-bottom:.55em}.bt-pull{font-size:1.22em;padding-top:.55em}.bt-chno{font-size:.62em}}
/* set by book-tour.js when a page overflows (tiny phones, long languages) */
.bt-fit1 .bt-chq{font-size:1.56em!important}.bt-fit1 .bt-asked{margin-bottom:.35em}.bt-fit1 .bt-chno{font-size:.58em}.bt-fit1 .bt-pull{font-size:1.12em;padding-top:.45em}.bt-fit1 .bt-dc::first-letter{font-size:3.6em}
.bt-fit2 .bt-pull{display:none}
.bt-more{display:none;text-indent:1.4em;margin-top:.15em}
@container (min-width:440px){.bt-more{display:block}}
.bt-dc::first-letter{float:left;font-family:var(--serif);font-weight:600;font-size:4.75em;line-height:.74;padding:.05em .08em 0 0;margin-left:-.04em;color:var(--acc)}
.bt-pull{margin:auto 0 0;padding:.7em .4em 0;border-top:1px solid rgba(201,169,97,.55);font-family:var(--serif);font-style:italic;font-weight:500;font-size:1.38em;line-height:1.18;color:var(--acc-d);text-align:center;position:relative}
.bt-pull::before{content:"";position:absolute;top:-.3em;left:50%;width:.55em;height:.55em;margin-left:-.275em;transform:rotate(45deg);background:var(--bt-paper);border:1px solid rgba(201,169,97,.75)}

/* ---------- 4 · full-bleed photo ---------- */
.bt-photo .bt-face{background:#2a201b}
.bt-photo img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;display:block;filter:sepia(.12) contrast(1.03)}
.bt-photo .bt-face::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(40,15,8,.28),rgba(40,15,8,0) 8%),linear-gradient(180deg,rgba(30,12,6,0) 62%,rgba(30,12,6,.62) 100%);pointer-events:none}
.bt-phcap{position:absolute;left:9.6cqw;right:7cqw;bottom:6.4cqw;z-index:2;color:#FFF4E2;font-family:Caveat,cursive;font-weight:600;font-size:7.4cqw;line-height:1.02;text-shadow:0 1px 8px rgba(0,0,0,.45)}
.bt-phcap small{display:block;font-family:var(--sans);font-weight:700;font-size:2.5cqw;letter-spacing:.24em;text-transform:uppercase;opacity:.85;margin-bottom:1.6cqw;text-shadow:none}

/* ---------- 5 · voice + QR ---------- */
.bt-voice .bt-pgi{text-align:center;align-items:center;justify-content:center;padding-bottom:13cqw}
.bt .bt-vt{font-family:var(--serif);font-weight:600;font-size:1.62em;line-height:1.08;color:var(--ink);margin:.45em 0 0;max-width:10.5em;text-wrap:balance}
.bt-qrbox{position:relative;width:44cqw;margin:1.15em auto 1em;padding:2.6cqw;background:#fff;border-radius:3cqw;box-shadow:0 .6cqw 2.4cqw rgba(60,20,10,.12),inset 0 0 0 1px #EFE4D2}
.bt-qrbox canvas{display:block;width:100%!important;height:auto!important;position:static!important}
.bt-qrbox b{position:absolute;width:5cqw;height:5cqw;border:2px solid var(--acc);opacity:.9}
.bt-qrbox b:nth-of-type(1){left:-2.2cqw;top:-2.2cqw;border-right:0;border-bottom:0;border-radius:1.4cqw 0 0 0}
.bt-qrbox b:nth-of-type(2){right:-2.2cqw;top:-2.2cqw;border-left:0;border-bottom:0;border-radius:0 1.4cqw 0 0}
.bt-qrbox b:nth-of-type(3){left:-2.2cqw;bottom:-2.2cqw;border-right:0;border-top:0;border-radius:0 0 0 1.4cqw}
.bt-qrbox b:nth-of-type(4){right:-2.2cqw;bottom:-2.2cqw;border-left:0;border-top:0;border-radius:0 0 1.4cqw 0}
.bt-scan{position:absolute;left:2.6cqw;right:2.6cqw;top:2.6cqw;height:2px;background:linear-gradient(90deg,rgba(122,36,48,0),rgba(122,36,48,.75),rgba(122,36,48,0));box-shadow:0 0 10px rgba(122,36,48,.45);animation:btScan 2.6s ease-in-out infinite;will-change:transform}
.bt-vs{font-size:.92em;color:var(--ink2);line-height:1.45;max-width:17em;text-wrap:balance}
.bt-play{all:unset;box-sizing:border-box;display:inline-flex;align-items:center;gap:.65em;margin-top:.95em;padding:.55em 1.05em .55em .55em;border-radius:999px;background:var(--acc);color:#FFF4E6;font-family:var(--sans);font-weight:800;font-size:.86em;line-height:1;cursor:pointer;box-shadow:0 .5em 1.2em rgba(91,26,34,.28);-webkit-tap-highlight-color:transparent;position:relative;z-index:3}
.bt-play:focus-visible{outline:2px solid var(--gold);outline-offset:3px}
.bt-play .bt-pi{width:2.1em;height:2.1em;border-radius:50%;background:#FFF4E6;color:var(--acc);display:flex;align-items:center;justify-content:center}
.bt-play .bt-pi svg{width:.95em;height:.95em}
.bt-play .bt-pi .bt-ps{display:none}
.bt-play.is-playing .bt-pi .bt-pp{display:none}.bt-play.is-playing .bt-pi .bt-ps{display:block}
.bt-wave{display:inline-flex;align-items:center;gap:2px;height:1.5em}
.bt-wave i{display:block;width:2px;border-radius:2px;background:rgba(255,244,230,.42);transform-origin:50% 50%}
.bt-wave i.is-on{background:#FFF4E6}
.bt-play.is-playing .bt-wave i{animation:btBar 1s ease-in-out infinite}
.bt-vfoot{position:absolute;left:0;right:0;bottom:7.5cqw;font-family:var(--sans);font-size:.62em;font-weight:700;letter-spacing:.2em;text-transform:uppercase;color:#A8968A}

/* ---------- 6 · family tree ---------- */
.bt-tree{display:flex;flex-direction:column;justify-content:center;flex:1 1 auto;gap:1.25em;margin:.2em 0 .4em;text-align:center}
.bt-gen{display:flex;justify-content:center;flex-wrap:wrap;gap:.5em .4em;position:relative}
.bt-gen+.bt-gen::before{content:"";position:absolute;left:50%;top:-1.25em;height:1.25em;width:1px;background:linear-gradient(#C9A961,#D8C7A8)}
.bt-gen>span{font-family:var(--serif);font-weight:600;font-size:1.02em;line-height:1.1;padding:.34em .62em;border-radius:1em;border:1px solid #E1D3BC;background:#fff;white-space:nowrap;color:var(--ink)}
.bt-gen .bt-me{background:var(--acc);border-color:var(--acc);color:#FFF4E6;box-shadow:0 0 0 .22em rgba(201,169,97,.35)}
.bt-gen>small{display:block;font-family:var(--sans);font-size:.56em;font-weight:800;letter-spacing:.2em;text-transform:uppercase;color:#A8968A;line-height:1;margin-bottom:.1em;flex-basis:100%}
.bt-tnote{padding-top:.6em;text-align:center;font-family:var(--serif);font-style:italic;font-size:1.08em;color:var(--ink2)}

/* ---------- 7 · back cover ---------- */
.bt-back .bt-cv{padding-top:0;justify-content:center;inset:0 0 0 3.4cqw}
.bt-back .bt-cv-heart{margin:0 0 5cqw;width:6cqw;height:6cqw}
.bt-bm{font-family:var(--serif);font-weight:700;font-size:10cqw;line-height:1;color:#F6E7CB;letter-spacing:.01em}
.bt-blurb{font-family:var(--serif);font-style:italic;font-weight:500;font-size:5.6cqw;line-height:1.25;color:rgba(246,231,203,.9);max-width:64cqw;margin-top:4.4cqw;text-wrap:balance}
.bt-next{all:unset;box-sizing:border-box;position:absolute;left:0;right:0;margin:0 auto;width:max-content;bottom:10cqw;display:flex;align-items:center;gap:.55em;white-space:nowrap;padding:.85em 1.3em;border-radius:999px;background:rgba(255,246,232,.94);color:var(--acc-d);font-family:var(--sans);font-weight:800;font-size:15px;line-height:1;cursor:pointer;box-shadow:0 10px 26px rgba(0,0,0,.3);-webkit-tap-highlight-color:transparent}
.bt-next svg{width:16px;height:16px;animation:btBob 1.6s ease-in-out infinite}
.bt-next:focus-visible{outline:2px solid var(--gold2);outline-offset:3px}

/* ---------- book body (board, page edges, ribbon) ---------- */
.bt-board{position:absolute;inset:0;border-radius:3px 10px 10px 3px;background:linear-gradient(140deg,var(--bt-cloth1),var(--bt-cloth2) 50%,var(--bt-cloth3));box-shadow:0 2.4cqw 5cqw -1cqw rgba(60,20,10,.42),0 8cqw 14cqw -6cqw rgba(60,20,10,.45)}
.bt-block{position:absolute;top:1.1%;right:1.3%;bottom:1.15%;left:0;border-radius:2px 4px 4px 2px;background:repeating-linear-gradient(90deg,#FFFDF7 0 1px,#E2D5BF 1px 2px);box-shadow:inset 0 0 0 1px rgba(110,80,50,.12)}
.bt-block::after{content:"";position:absolute;left:0;right:0;bottom:0;height:1.2%;background:repeating-linear-gradient(180deg,#FFFDF7 0 1px,#E2D5BF 1px 2px)}
.bt-ribbon{position:absolute;left:71%;top:62%;bottom:-8cqw;width:3.4cqw;transform-origin:50% 0;animation:btSway 5.5s ease-in-out infinite;background:linear-gradient(90deg,#8E6A2C,#E3C47F 45%,#B8913F 70%,#8E6A2C);clip-path:polygon(0 0,100% 0,100% 100%,50% 92%,0 100%);box-shadow:inset -1px 0 0 rgba(0,0,0,.15)}
.bt-fx{position:absolute;left:-15%;top:-12%;width:130%;height:124%;pointer-events:none;z-index:40}

/* ---------- static list (default; no JS / no GSAP / reduced motion) ---------- */
.bt-stage{max-width:1120px;margin:0 auto;padding:26px var(--gut) clamp(44px,7vw,92px)}
.bt-side,.bt-tap,.bt-fx{display:none}
.bt:not(.bt-live) .bt-book{display:grid;gap:30px;justify-items:center}
.bt:not(.bt-live) .bt-stack{width:min(100%,440px);display:grid;gap:30px;container-type:inline-size}
.bt:not(.bt-live) .bt-pg{position:relative;inset:auto;width:100%;aspect-ratio:15/23;border-radius:3px 8px 8px 3px;box-shadow:0 18px 40px -16px rgba(60,20,10,.4)}
.bt:not(.bt-live) .bt-board,.bt:not(.bt-live) .bt-block,.bt:not(.bt-live) .bt-ribbon,.bt:not(.bt-live) .bt-cover-in{display:none}
.bt:not(.bt-live) .bt-scap{display:block;text-align:center;margin:0 auto -14px;max-width:440px}
.bt-scap{display:none}
.bt-scap b{display:block;font-family:var(--sans);font-size:12px;font-weight:800;letter-spacing:.18em;text-transform:uppercase;color:var(--acc);margin-bottom:4px}
.bt-scap span{font-size:15.5px;color:var(--ink2)}

/* ---------- live: pinned stage ---------- */
.bt-live .bt-pin{position:relative;height:100vh;height:100svh;overflow:hidden;background:radial-gradient(70% 46% at 50% 58%,#F1E0CA 0%,rgba(241,224,202,0) 100%),var(--paper)}
@media (min-width:900px){.bt-live .bt-pin{background:radial-gradient(42% 60% at 68% 52%,#F1E0CA 0%,rgba(241,224,202,0) 100%),var(--paper)}}
.bt-live .bt-stage{--capH:66px;--pw:min(calc(100vw - 2*var(--gut)),calc((100vh - 206px)*.652),470px);height:100%;display:flex;flex-direction:column;padding:max(14px,env(safe-area-inset-top)) var(--gut) 0}
@supports(height:100svh){.bt-live .bt-stage{--pw:min(calc(100vw - 2*var(--gut)),calc((100svh - 206px)*.652),470px)}}
.bt-live .bt-side{display:block;flex:0 0 auto;max-width:470px;width:100%;margin:0 auto}
.bt-rail{display:flex;gap:4px;height:3px}
.bt-rail i{flex:1;border-radius:3px;background:rgba(122,36,48,.15);overflow:hidden}
.bt-rail b{display:block;height:100%;background:var(--acc);transform-origin:0 50%;transform:scaleX(0)}
.bt-rail i:first-child b{transform:none}
.bt-caps{position:relative;height:var(--capH);margin-top:12px}
.bt-cap{position:absolute;left:0;right:0;top:0;opacity:0;visibility:hidden}
.bt-cap:first-child{opacity:1;visibility:visible}
.bt-no{display:flex;gap:.55em;align-items:center;font-family:var(--sans);font-size:11.5px;font-weight:800;letter-spacing:.18em;text-transform:uppercase;color:var(--acc);line-height:1}
.bt-no em{font-style:normal;color:var(--muted);letter-spacing:.08em}
.bt-cap p{font-family:var(--sans);font-size:16px;font-weight:600;line-height:1.36;color:var(--ink);margin-top:8px;text-wrap:pretty}
.bt-cap .bt-det{display:none}
.bt-live .bt-book{flex:1 1 auto;min-height:0;display:flex;align-items:center;justify-content:center;position:relative;padding-bottom:58px}
.bt-live .bt-stack{width:var(--pw);height:calc(var(--pw)/.652);cursor:pointer;outline:none}
.bt-live .bt-stack:focus-visible{box-shadow:0 0 0 3px rgba(201,169,97,.7);border-radius:6px}
.bt-live .bt-pg{will-change:transform}
.bt-live .bt-fx{display:block}
.bt-live .bt-tap{display:flex;position:absolute;left:0;right:0;bottom:16px;justify-content:center;align-items:center;gap:10px;font-family:var(--sans);font-size:13px;font-weight:700;color:var(--muted);pointer-events:none;transition:opacity .4s}
.bt-tap .bt-dot{position:relative;width:10px;height:10px;border-radius:50%;background:var(--acc)}
.bt-tap .bt-dot::after{content:"";position:absolute;inset:-6px;border-radius:50%;border:1.5px solid var(--acc);animation:btPing 1.8s ease-out infinite}
.bt[data-cur]:not([data-cur="0"]) .bt-tap{opacity:0}
.bt-toc{display:none}

/* small phones (≈ iPhone SE inside Telegram) */
@media (max-height:700px){
  .bt-live .bt-stage{--capH:58px;--pw:min(calc(100vw - 2*var(--gut)),calc((100vh - 150px)*.652),470px)}
  @supports(height:100svh){.bt-live .bt-stage{--pw:min(calc(100vw - 2*var(--gut)),calc((100svh - 150px)*.652),470px)}}
  .bt-live .bt-book{padding-bottom:30px}
  .bt-live .bt-tap{display:none}
  .bt-cap p{font-size:15px;margin-top:6px}
  .bt-caps{margin-top:10px}
}

/* ---------- desktop ---------- */
@media (min-width:900px){
  .bt-live .bt-stage{--pw:min(500px,calc((100vh - 150px)*.652));display:grid;grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:clamp(48px,7vw,110px);max-width:1120px;margin:0 auto;padding:0 var(--gut)}
  @supports(height:100svh){.bt-live .bt-stage{--pw:min(500px,calc((100svh - 150px)*.652))}}
  .bt-live .bt-side{max-width:420px;margin:0}
  .bt-rail{display:none}
  .bt-caps{height:236px;margin-top:0}
  .bt-no{font-size:12.5px}
  .bt-cap p{font-family:var(--serif);font-size:clamp(30px,2.9vw,40px);font-weight:600;line-height:1.08;margin-top:16px;letter-spacing:-.005em}
  .bt-cap .bt-det{display:block;font-family:var(--sans);font-size:17px;font-weight:400;line-height:1.5;color:var(--ink2);margin-top:14px;letter-spacing:0}
  .bt-live .bt-book{padding-bottom:0;height:100%}
  .bt-live .bt-tap{display:none}
  .bt-toc{display:block;list-style:none;margin:6px 0 0;padding:0 0 0 20px;position:relative}
  .bt-toc::before,.bt-tocbar{content:"";position:absolute;left:0;top:8px;bottom:8px;width:2px;border-radius:2px;background:rgba(122,36,48,.14)}
  .bt-tocbar{background:var(--acc);transform-origin:50% 0;transform:scaleY(0)}
  .bt-toc button{all:unset;box-sizing:border-box;cursor:pointer;display:flex;gap:14px;align-items:baseline;padding:5px 0;font-family:var(--sans);font-size:15px;font-weight:600;line-height:1.3;color:var(--muted);transition:color .3s,transform .3s}
  .bt-toc button:hover{color:var(--ink)}
  .bt-toc button:focus-visible{outline:2px solid var(--gold);outline-offset:2px;border-radius:4px}
  .bt-toc button i{font-style:normal;font-size:11px;font-weight:800;letter-spacing:.1em;width:20px;opacity:.75}
  .bt-toc li.is-on button{color:var(--acc-d);transform:translateX(6px)}
}

/* ---------- keyframes (transform / opacity only) ---------- */
@keyframes btBeat{0%,100%{transform:scale(1)}12%{transform:scale(1.18)}24%{transform:scale(1)}}
@keyframes btShine{0%{transform:translateX(0) skewX(-12deg)}38%,100%{transform:translateX(420%) skewX(-12deg)}}
@keyframes btSway{0%,100%{transform:rotate(1.2deg)}50%{transform:rotate(-1.4deg)}}
@keyframes btScan{0%,100%{transform:translateY(0);opacity:.2}50%{transform:translateY(38cqw);opacity:1}}
@keyframes btBar{0%,100%{transform:scaleY(1)}50%{transform:scaleY(.45)}}
@keyframes btBob{0%,100%{transform:translateY(0)}50%{transform:translateY(3px)}}
@keyframes btPing{0%{transform:scale(.6);opacity:.9}100%{transform:scale(1.8);opacity:0}}
@media (prefers-reduced-motion:reduce){.bt *{animation:none!important}}