:root{--beta-ink:#101116;--beta-paper:#f5f5f7;--beta-muted:#677080;--beta-line:#d9dce4;--beta-aqua:#1f9db9;--beta-lime:#d9ff54}
header .public-links{display:flex;align-items:center;gap:14px;padding:0;overflow:visible}
header .public-links a,header .public-links .link-button{font:11px Inter,system-ui,sans-serif;color:#c6cad6;text-decoration:none;background:none;border:0;padding:0;cursor:pointer}
header .public-links a:hover,header .public-links .link-button:hover{color:#fff;text-decoration:underline}
.link-button{font:inherit}
.panel-help{display:block;max-width:520px;color:#747987;font-size:11px;line-height:1.45;margin-top:6px}
.signal{height:auto;min-height:184px;padding:27px 30px}
.signal h1{max-width:min(860px,78%);font-size:clamp(30px,4vw,54px);line-height:1.02;overflow-wrap:anywhere}
.signal video{filter:grayscale(1) contrast(1.35);opacity:.37}
.signal:after{background:linear-gradient(90deg,rgba(10,11,15,.94) 0%,rgba(10,11,15,.68) 48%,rgba(10,11,15,.26) 100%)}
.stats small{display:block;color:#7a8190;font-size:10px;margin-top:3px}
.legend b{font-weight:500}
.occurrence{padding:13px 6px}
.occurrence.selected{background:#f5ffe0;box-shadow:inset 3px 0 0 var(--beta-lime)}
.occurrence>span{font-size:10px;color:#5f6573}
.family-empty{margin:0;color:#6d7482}
.family h3,#family h3{font-size:17px;line-height:1.2;margin:0 0 9px;color:#171922}
#family p{font-size:12px;line-height:1.5;margin:0 0 10px}
#family small{display:block;font-size:10px;color:#6f7481;margin-top:2px}
.family-status{padding:9px 10px;background:#f1f2f6;color:#5f6471}
.family-status.visible{border-left:3px solid var(--beta-lime);background:#f8ffe8;color:#364115}
.score-panel{margin-top:18px;padding:20px;background:#fff;border:1px solid var(--beta-line);border-radius:7px}
.score{min-height:145px;padding:12px;background:#fbfbfc;border:1px solid #eceef2;overflow:auto}
.score svg{display:block;min-width:680px;max-width:none}
.score-empty{margin:0;color:#6c7280;font-size:12px}
.watch-full{display:flex;justify-content:space-between;align-items:center;gap:22px;margin-top:18px;padding:22px 25px;background:#151720;color:#fff}
.watch-full p,.library-note>div>p,.welcome-strip p{margin:0 0 7px;color:var(--beta-aqua);font-size:10px;font-weight:800;letter-spacing:1.1px}
.watch-full h2,.library-note h2,.welcome-strip h2{font:clamp(26px,3vw,40px)/1.05 Georgia,serif;margin:0}
.watch-full span{display:block;margin-top:9px;color:#b6bdc9;font-size:12px}
.watch-full a{flex:0 0 auto;border:1px solid var(--beta-lime);color:#fff;padding:11px 14px;text-decoration:none;font:800 11px Inter,system-ui,sans-serif}
.welcome-strip{display:grid;grid-template-columns:minmax(0,1fr) minmax(300px,.8fr);gap:28px;padding:26px 30px;margin-bottom:18px;background:#e8f4f7;border-left:4px solid var(--beta-aqua)}
.welcome-strip ol{margin:3px 0 0;padding-left:20px;color:#40526b;font:13px/1.8 Inter,system-ui,sans-serif}
.library-note{display:grid;grid-template-columns:minmax(240px,.8fr) minmax(280px,1fr) minmax(280px,1fr);gap:25px;margin-top:28px;padding:31px;border-top:4px solid var(--beta-ink);background:#fff}
.library-note>p{margin:0;color:#5d6675;font-size:13px;line-height:1.65}
.beta-gate{position:fixed;z-index:1000;inset:0;overflow:auto;background:#0b0c10;color:#fff;display:grid;place-items:center;padding:clamp(20px,4vw,58px)}
.beta-gate:before{content:'';position:fixed;inset:0;background:linear-gradient(90deg,rgba(7,8,11,.94),rgba(7,8,11,.78)),url('/assets/mathsic-pianist-beta.png') center/cover no-repeat;filter:saturate(.75)}
.beta-gate-frame{width:min(1060px,100%);position:relative;display:grid;grid-template-columns:minmax(0,1.2fr) minmax(300px,.8fr);column-gap:clamp(30px,6vw,88px);row-gap:24px;padding:clamp(23px,4vw,48px);border:1px solid rgba(255,255,255,.22);background:rgba(16,17,22,.63);box-shadow:0 26px 72px rgba(0,0,0,.42);backdrop-filter:blur(5px)}
.beta-mark{grid-column:1/-1;display:flex;align-items:center;gap:14px}
.beta-mark img{width:min(290px,65vw);height:78px;object-fit:contain;filter:invert(1) grayscale(1) contrast(1.5);transform:perspective(300px) rotateX(5deg)}
.beta-mark span{border:1px solid var(--beta-lime);color:var(--beta-lime);padding:5px 7px;font:800 10px Inter,system-ui,sans-serif;letter-spacing:1.5px}
.beta-video{position:relative;grid-column:1/2;grid-row:2/4;align-self:stretch;min-height:360px;background:#050507;border:1px solid rgba(255,255,255,.22)}
.beta-video video{display:block;width:100%;height:100%;min-height:360px;object-fit:cover}
.beta-copy{grid-column:2;grid-row:2}
.beta-copy>p:first-child,.feedback-dialog>p{margin:0 0 9px;color:var(--beta-lime);font:800 10px Inter,system-ui,sans-serif;letter-spacing:1.25px}
.beta-copy h1{font:clamp(34px,4.5vw,56px)/1.02 Georgia,serif;margin:0 0 16px}
.beta-copy>p:last-child{margin:0;color:#d2d6de;font:15px/1.55 Inter,system-ui,sans-serif}
.beta-auth{grid-column:2;grid-row:3;padding-top:4px}
.beta-auth-tabs{display:flex;gap:18px;border-bottom:1px solid rgba(255,255,255,.24);margin-bottom:14px}
.beta-tab{border:0;border-bottom:2px solid transparent;background:none;color:#aeb5c2;padding:0 0 9px;cursor:pointer;font:800 11px Inter,system-ui,sans-serif}
.beta-tab.on{color:#fff;border-color:var(--beta-lime)}
.beta-auth form{display:grid;gap:10px}
.beta-auth label{display:grid;gap:6px;color:#e7eaf0;font:800 10px Inter,system-ui,sans-serif;letter-spacing:.3px}.beta-auth label[hidden]{display:none}
.beta-auth input{height:38px;background:rgba(255,255,255,.97);border:1px solid #fff;padding:0 10px;color:#12141a;font:13px Inter,system-ui,sans-serif}
.beta-auth button[type=submit],.feedback-dialog form>button{height:40px;margin-top:5px;border:1px solid var(--beta-lime);background:var(--beta-lime);color:#101116;cursor:pointer;font:800 12px Inter,system-ui,sans-serif}
.beta-auth-status{min-height:32px;margin:0;color:#c2c8d3;font:11px/1.45 Inter,system-ui,sans-serif}
.beta-auth-status.error{color:#ffafa1}.beta-auth-status.ready{color:var(--beta-lime)}
body.beta-ready .beta-gate{display:none}body.beta-ready .shell{display:grid}
.beta-welcome{width:min(760px,calc(100% - 30px));padding:0;border:1px solid #3c4250;background:#11131a;color:#f7f8fb;box-shadow:0 28px 90px rgba(0,0,0,.58)}.beta-welcome::backdrop{background:rgba(6,7,11,.72)}.beta-welcome-mark{position:relative;min-height:122px;padding:25px 34px 19px;overflow:hidden;border-bottom:1px solid #323744;background:#11131a}.beta-welcome-mark img{position:relative;z-index:1;width:min(330px,78%);display:block;filter:invert(1) grayscale(1) contrast(3) brightness(.85) drop-shadow(0 3px 0 rgba(0,0,0,.65));mix-blend-mode:screen}.beta-welcome-mark span{position:absolute;z-index:1;right:34px;bottom:23px;color:var(--beta-lime);font:800 12px Inter,system-ui,sans-serif;letter-spacing:2px}.beta-welcome-mark button{position:absolute;z-index:2;right:13px;top:9px;border:0;background:transparent;color:#eef1f8;font-size:27px;line-height:1;cursor:pointer}.beta-welcome-body{padding:28px 34px 32px}.beta-welcome-eyebrow{margin:0 0 9px;color:var(--beta-lime);font:800 11px Inter,system-ui,sans-serif;letter-spacing:1.35px}.beta-welcome-body h2{margin:0 0 9px;color:#fff;font:clamp(30px,4.4vw,47px)/1.02 Georgia,serif}.beta-welcome-body>p{max-width:650px;margin:0 0 13px;color:#c5cbd7;font:15px/1.55 Inter,system-ui,sans-serif}.beta-welcome-body .beta-welcome-name{color:#fff;font-weight:700}.beta-welcome-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:20px 0}.beta-welcome-grid div{display:grid;gap:6px;padding:14px 0;border-top:1px solid #363c49}.beta-welcome-grid b{color:#fff;font:800 12px Inter,system-ui,sans-serif}.beta-welcome-grid span{color:#bac1ce;font:12px/1.45 Inter,system-ui,sans-serif}.beta-welcome-note{color:#d9ff54!important}.beta-welcome-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:23px}.beta-welcome-actions button{min-height:40px;padding:0 15px;border:1px solid var(--beta-lime);cursor:pointer;font:800 12px Inter,system-ui,sans-serif}.beta-welcome-actions button:first-child{background:var(--beta-lime);color:#101116}.beta-welcome-actions button:last-child{background:transparent;color:#eff2f8}
.feedback-dialog{width:min(690px,calc(100% - 30px));border:1px solid var(--beta-line);padding:clamp(22px,4vw,36px);box-shadow:0 25px 70px rgba(20,22,28,.3)}
.feedback-dialog::backdrop{background:rgba(9,10,14,.78)}
.feedback-dialog>button{float:right;border:0;background:transparent;font-size:24px;cursor:pointer}
.feedback-dialog h2{font:clamp(30px,4vw,45px)/1.03 Georgia,serif;margin:0 0 23px}
.feedback-dialog form{display:grid;gap:18px}.feedback-dialog fieldset{border:0;border-top:1px solid var(--beta-line);padding:14px 0 0;margin:0}.feedback-dialog legend{padding:0;color:#313846;font:800 12px Inter,system-ui,sans-serif}
.rating,.checks{display:flex;flex-wrap:wrap;gap:10px;margin-top:10px}.rating label,.checks label,.contact-label{font:12px/1.35 Inter,system-ui,sans-serif;color:#505866}
.feedback-dialog form>label{display:grid;gap:7px;color:#313846;font:800 12px Inter,system-ui,sans-serif}
.feedback-dialog textarea{min-height:72px;resize:vertical;border:1px solid #cdd3df;padding:9px;font:13px/1.4 Inter,system-ui,sans-serif}.feedback-dialog .idea-label textarea{min-height:100px}
.feedback-status{min-height:18px;margin:0;color:#566173;font:11px/1.4 Inter,system-ui,sans-serif}.feedback-status.error{color:#b13831}.feedback-status.ready{color:#267156}
@media(max-width:980px){.welcome-strip,.library-note{grid-template-columns:1fr}.library-note{gap:16px}.beta-gate-frame{grid-template-columns:1fr;max-width:620px}.beta-video,.beta-copy,.beta-auth{grid-column:1;grid-row:auto}.beta-video{min-height:270px}.beta-video video{min-height:270px}}
@media(max-width:720px){header .public-links a:first-child,header .public-links a:nth-child(2){display:none}.signal{min-height:190px;padding:22px}.signal h1{max-width:100%;font-size:clamp(29px,10vw,42px)}.welcome-strip{padding:21px}.score-panel{padding:15px}.score{padding:8px}.watch-full{display:block}.watch-full a{display:inline-block;margin-top:16px}.beta-gate{padding:0}.beta-gate-frame{min-height:100%;border:0;padding:26px 20px;background:rgba(12,13,18,.8)}.beta-mark img{height:56px}.beta-video,.beta-video video{min-height:220px}.beta-copy h1{font-size:38px}.rating,.checks{display:grid;gap:8px}.feedback-dialog{padding:24px 19px}}
main{margin:0 auto}
 .signal-data a{display:inline-block;margin-top:13px;padding:9px 11px;background:var(--beta-lime);color:#11131a;font:800 10px Inter,system-ui,sans-serif;letter-spacing:.35px;text-decoration:none}.signal-data a:hover{background:#efff8a}

/* A work title is content, not a fixed-width label: it must always stay in its card. */
.signal > div{min-width:0}.signal h1{overflow-wrap:anywhere;hyphens:auto}.signal-data{flex:0 0 auto}

/* The pianist appears once, as part of the welcome: person on the left, reading on the piano side. */
.welcome-strip{position:relative;isolation:isolate;overflow:hidden;min-height:260px;display:grid;grid-template-columns:44% minmax(0,56%);align-content:center;background:#101116;color:#fff}
.welcome-strip>*{position:relative;z-index:1;grid-column:2}.welcome-strip>div>p{color:var(--beta-lime)}.welcome-strip h2{color:#fff;text-shadow:0 2px 16px rgba(0,0,0,.7)}.welcome-strip ol{color:#eef1f6;text-shadow:0 1px 10px rgba(0,0,0,.7)}
.welcome-strip:after{content:'';position:absolute;inset:0;z-index:0;background-image:linear-gradient(90deg,rgba(8,12,17,.04) 0%,rgba(8,12,17,.16) 34%,rgba(8,12,17,.62) 57%,rgba(8,12,17,.91) 100%),url('/assets/mathsic-pianist-beta.png');background-repeat:no-repeat;background-size:cover;background-position:center;filter:saturate(.8) contrast(1.05)}
@media(max-width:720px){.signal h1{overflow-wrap:normal;word-break:normal;hyphens:none;font-size:clamp(28px,10vw,40px)}.welcome-strip{min-height:300px;padding:24px 20px;grid-template-columns:43% minmax(0,57%)}.welcome-strip ol{max-width:none}}
@media(max-width:720px){.beta-welcome{width:calc(100% - 24px);max-height:calc(100dvh - 24px)}.beta-welcome-mark{min-height:92px;padding:19px 20px 16px}.beta-welcome-mark span{right:20px;bottom:17px}.beta-welcome-body{padding:23px 20px 25px;overflow:auto;max-height:calc(100dvh - 120px)}.beta-welcome-grid{grid-template-columns:1fr;gap:2px;margin:16px 0}.beta-welcome-body>p{font-size:14px}.beta-welcome-actions{display:grid}.beta-welcome-actions button{width:100%}}

/* Some mobile browsers request desktop pages. A touch, portrait screen still needs the one-column reading layout. */
@media(max-width:900px),(hover:none) and (pointer:coarse),(max-aspect-ratio:1/1){
  .shell{display:block!important}
  header{height:60px;padding:0 15px}.brand img{width:125px}.system{display:none}
  header .public-links a:first-child,header .public-links a:nth-child(2){display:none}
  aside{height:205px;border-right:0;border-bottom:1px solid var(--beta-line)}.side-title{padding:14px 18px 8px}aside nav{display:flex;overflow:auto}.work{min-width:190px;border-left:0;border-bottom:2px solid transparent}.work.on{border-bottom-color:var(--violet)}aside footer{display:none}
  main{padding:14px 14px 35px}.signal{height:auto;min-height:0;padding:20px 20px 70px}.signal h1{max-width:100%;font-size:clamp(27px,8vw,35px);line-height:1.04;overflow-wrap:normal;word-break:normal;hyphens:none}.signal-data{display:block;position:absolute;left:20px;bottom:20px;text-align:left}.signal-data b,.signal-data span{display:none}.signal-data a{margin:0;padding:9px 10px;font-size:9px}
  .welcome-strip{min-height:300px;padding:24px 20px;grid-template-columns:43% minmax(0,57%)}.welcome-strip>div,.welcome-strip>ol{grid-column:2}.welcome-strip ol{max-width:none}
  .stats{grid-template-columns:1fr 1fr}.stats div:nth-child(2){border-right:0}.stats div:nth-child(-n+2){border-bottom:1px solid var(--beta-line)}
  .roll-panel,.list-panel,.detail,.score-panel{padding:15px}.panel-top{display:block}#filters{justify-content:flex-start;margin-top:12px}.canvas-wrap{height:245px}.range{grid-template-columns:32px 1fr 32px}.range b{grid-column:1/-1;text-align:left}.legend{flex-wrap:wrap;gap:12px}
}

/* The welcome leads into the catalogue, so it belongs directly below the Mathsic bar. */
@media(min-width:901px){
  .shell{grid-template:68px auto minmax(0,1fr)/282px minmax(0,1fr)}
  .shell>header{grid-row:1}
  .shell>.welcome-strip{grid-column:1/-1;grid-row:2;margin:0}
  .shell>aside,.shell>main{grid-row:3}
}

/* The entry is read top to bottom: identity, film, then access. */
.beta-gate{place-items:start center;padding:clamp(24px,5vw,64px) 20px}
.beta-gate-frame{width:min(900px,100%);display:flex;flex-direction:column;gap:24px;padding:clamp(18px,3vw,32px);background:rgba(12,13,18,.78)}
.beta-hero{position:relative;display:grid;place-items:center;overflow:hidden;aspect-ratio:2048/900;padding:0 12px;border:1px solid rgba(255,255,255,.2);background:#050506;box-shadow:0 18px 45px rgba(0,0,0,.34)}
.beta-hero img{display:block;width:100%;height:auto;max-height:100%;object-fit:contain}
.beta-hero:after{content:'';position:absolute;inset:0;background:linear-gradient(90deg,rgba(0,0,0,.13),transparent 44%,rgba(0,0,0,.15));pointer-events:none}
.beta-hero span{position:absolute;right:16px;bottom:15px;z-index:1;border:1px solid var(--beta-lime);background:rgba(9,10,13,.72);color:var(--beta-lime);padding:5px 7px;font:800 10px Inter,system-ui,sans-serif;letter-spacing:1.5px}
.beta-video{grid-column:auto;grid-row:auto;align-self:auto;width:100%;min-height:0;aspect-ratio:16/9}.beta-video video{min-height:0}
.beta-copy{grid-column:auto;grid-row:auto;max-width:680px;margin:0 auto;text-align:center}.beta-copy h1{font-size:clamp(34px,6vw,56px)}
.beta-auth{grid-column:auto;grid-row:auto;width:min(480px,100%);margin:0 auto;padding-top:0}.beta-auth-tabs{justify-content:center}.beta-auth-status{text-align:center}
@media(max-width:720px){.beta-gate{padding:0}.beta-gate-frame{gap:20px;padding:20px 16px}.beta-hero img{object-position:center}.beta-copy h1{font-size:clamp(32px,10vw,42px)}}

/* The logo asset has a black field, so the application bar shares that field. */
header{background:#000;border-bottom-color:#252525}