:root{color-scheme:dark;--bg:#101015;--surface:#1a1a23;--raised:#22222e;--line:#30303e;--text:#f4f2fb;--muted:#a09faf;--purple:#b9a3ff;--green:#c4ed91;--red:#ff929e;--radius:24px;font-family:ui-sans-serif,-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;font-size:16px}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text)}button,input,select{font:inherit}button,a,input,select{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{cursor:default;opacity:.45}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid var(--green);outline-offset:4px}a{color:var(--purple);text-decoration:none}button{border:0;color:inherit}header{max-width:1200px;margin:auto;height:96px;display:flex;align-items:center;justify-content:space-between;padding:0 36px;border-bottom:1px solid var(--line)}.brand{display:flex;gap:12px;align-items:center;font-size:23px;font-weight:750;letter-spacing:2px}.brand img{width:36px;height:36px}.brand small{font-size:12px;color:var(--muted);letter-spacing:3px;font-weight:500;margin-left:8px}nav{display:flex;gap:30px}nav button{background:none;color:var(--muted);padding:12px 0;font-size:15px}nav button.active{color:var(--purple)}.install{border:1px solid var(--line);background:none;border-radius:30px;padding:9px 16px;font-size:14px}.container{max-width:1128px;margin:40px auto;padding:0 24px 72px}.eyebrow{color:var(--purple);font-size:12px;font-weight:650;letter-spacing:3px}.intro{display:flex;align-items:flex-end;justify-content:space-between;margin:0 0 30px}h1{font-size:36px;line-height:1.25;margin:12px 0;letter-spacing:-1px}h2{font-size:21px;margin:0 0 18px}h3{font-size:17px;margin:0 0 12px}p{color:var(--muted);line-height:1.75;margin:8px 0}small,.small{font-size:13px;color:var(--muted);line-height:1.6}.tag{display:inline-flex;align-items:center;gap:6px;font-size:13px;padding:7px 11px;border:1px solid var(--line);border-radius:20px;color:var(--muted)}.layout{display:grid;grid-template-columns:minmax(0,1.65fr) minmax(280px,1fr);gap:24px}.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:28px}.setup{padding:8px 28px 28px}.mode-tabs{display:grid;grid-template-columns:1fr 1fr;gap:8px;padding:7px;background:#121218;border-radius:16px;margin:20px 0 26px}.mode-tabs button{padding:15px 8px;background:transparent;border-radius:11px;color:var(--muted);font-weight:650}.mode-tabs button.active{background:var(--purple);color:#211736}.section-label{display:flex;align-items:center;justify-content:space-between;margin:24px 0 12px;font-size:15px;font-weight:650}.section-label span{font-size:12px;color:var(--muted);font-weight:400}.choices{display:grid;grid-template-columns:repeat(3,1fr);gap:9px}.choice{background:#20202a;border:1px solid var(--line);border-radius:13px;padding:14px 8px;text-align:center;font-size:14px}.choice.active{background:#2f2843;border-color:var(--purple);color:#d1bfff}.choice small{display:block;margin-top:7px;font-size:12px}.diff-mark{display:block;margin-bottom:7px;font-size:20px;letter-spacing:2px;color:var(--purple)}.segments{grid-template-columns:repeat(4,1fr)}.segments .choice{padding:13px 2px}.two{display:grid;grid-template-columns:1fr 1fr;gap:18px}label{display:block;font-size:14px;color:#c7c5d2;margin:0 0 8px}select,input{width:100%;background:#13131b;border:1px solid var(--line);border-radius:12px;color:var(--text);padding:13px 14px;min-height:48px}select{appearance:auto}.primary{width:100%;background:var(--green);color:#1d2814;border-radius:13px;min-height:54px;padding:15px 22px;font-weight:750;font-size:16px}.secondary{background:var(--raised);border:1px solid var(--line);border-radius:12px;min-height:46px;padding:11px 16px;font-size:14px}.text-button{background:none;color:var(--purple);padding:10px;font-size:14px}.start{margin-top:24px}.footnote{text-align:center;font-size:12px;margin-top:12px;color:var(--muted)}.side{display:flex;flex-direction:column;gap:20px}.feature{background:#c5ee92;color:#1e2917;border:0;position:relative;overflow:hidden}.feature .eyebrow{color:#516340}.feature h2{font-size:27px;line-height:1.4;margin-top:18px;position:relative}.feature p{color:#49533e;max-width:240px;font-size:14px}.wave{display:flex;align-items:center;justify-content:center;gap:6px;height:88px;margin:22px 0 12px}.wave i{width:6px;border-radius:10px;background:currentColor;height:var(--h);opacity:.85}.feature .wave{color:#56723a;justify-content:flex-start}.stats{display:flex;gap:32px;border-top:1px solid #a3c778;padding-top:18px;margin-top:20px}.stats strong{font-size:25px}.stats small{display:block;color:#536542;font-size:12px}.rules-mini{display:flex;gap:14px;margin:16px 0}.rules-mini b{font-size:15px;font-weight:600;display:block}.rules-mini p{font-size:13px;margin-top:3px}.step{border:1px solid var(--line);border-radius:50%;width:29px;height:29px;display:grid;place-items:center;flex-shrink:0;color:var(--purple);font-size:13px}.source-note{padding:0 4px;font-size:12px;color:#93909f;line-height:1.7}.join-row{display:flex;gap:10px;margin-top:16px}.join-row input{min-width:0}.join-row button{flex-shrink:0}.game{max-width:700px;margin:auto}.game-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px}.scoreboard{display:grid;grid-template-columns:1fr auto 1fr;gap:18px;align-items:center;margin:22px 0}.player{background:var(--surface);border:1px solid var(--line);padding:16px;border-radius:16px}.player.me{border-color:#6e598f}.player-name{font-size:14px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.player strong{display:block;font-size:29px;margin:8px 0}.player small{font-size:12px}.vs{color:var(--purple);font-weight:800;font-style:italic}.listen{text-align:center;padding:30px 20px}.clock{width:162px;height:162px;margin:10px auto 15px;position:relative;display:grid;place-items:center}.clock svg{position:absolute;inset:0;width:100%;transform:rotate(-90deg)}.clock circle{fill:none;stroke:var(--line);stroke-width:4}.clock #progress{stroke:var(--purple);stroke-linecap:round;transition:stroke-dashoffset .2s linear}.clock strong{font-size:46px;letter-spacing:-2px}.clock small{display:block;font-size:12px;letter-spacing:2px}.listen h2{margin-top:16px}.listen .wave{color:var(--purple);height:30px;margin:15px 0}.playing .wave i{animation:bounce .6s ease-in-out infinite alternate;animation-delay:var(--d)}@keyframes bounce{to{transform:scaleY(.25);opacity:.45}}.answers{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:20px}.answer{display:flex;align-items:center;gap:14px;padding:17px;text-align:left;background:var(--surface);border:1px solid var(--line);border-radius:14px;min-height:72px;line-height:1.5}.answer .letter{width:31px;height:31px;display:grid;place-items:center;flex-shrink:0;background:#292835;border-radius:8px;font-size:14px;color:var(--muted)}.answer.selected{border-color:var(--purple);background:#30263f}.answer.correct{border-color:var(--green);background:#263322}.answer.wrong{border-color:var(--red);background:#392329}.answer:disabled{opacity:1}.answer.correct .letter{background:var(--green);color:#192915}.answer.wrong .letter{background:var(--red);color:#3a1721}.answer-label{overflow-wrap:anywhere}.status{padding:18px;text-align:center;background:#252230;border-radius:14px;margin-top:16px;font-size:14px;line-height:1.7}.status.good{background:#283526;color:var(--green)}.status.bad{background:#35262e;color:var(--red)}.room-code{letter-spacing:9px;font-size:44px;font-weight:700;text-align:center;padding:24px 0;color:var(--purple)}.waiting{text-align:center;padding:28px}.avatar{width:52px;height:52px;display:grid;place-items:center;border-radius:18px;background:#302743;color:var(--purple);margin:0 auto 12px;font-size:24px}.room-players{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin:22px 0}.room-player{padding:22px 10px;background:#13131a;border-radius:16px;line-height:1.8}.result-heading{text-align:center;padding:18px 0}.result-heading .big{font-size:70px;color:var(--green);font-weight:750;line-height:1.3;letter-spacing:-3px}.result-heading h1{font-size:28px}.recap{width:100%;border-collapse:collapse;font-size:14px}.recap td,.recap th{text-align:left;border-bottom:1px solid var(--line);padding:14px 6px}.recap th{color:var(--muted);font-weight:400}.positive{color:var(--green)}.negative{color:var(--red)}.library-top{display:flex;gap:16px;align-items:center;margin:24px 0}.library-top input{max-width:440px}.song-row{display:flex;gap:16px;align-items:center;padding:17px 0;border-bottom:1px solid var(--line)}.song-num{width:35px;flex-shrink:0;color:#777482;font-size:13px}.song-info{flex:1;min-width:0}.song-info b{font-size:15px;font-weight:500}.song-info small{display:block;margin-top:4px}.song-badge{font-size:12px;color:var(--muted);border:1px solid var(--line);border-radius:8px;padding:5px 8px;white-space:nowrap}.notice{background:#292536;border:1px solid #484055;border-radius:13px;padding:14px 16px;color:#c9bddc;font-size:14px;line-height:1.7;margin:16px 0}.rule-block{margin:26px 0}.rule-block p{font-size:15px}.empty{padding:60px 10px;text-align:center}.spinner{width:32px;height:32px;border:3px solid var(--line);border-top-color:var(--purple);border-radius:50%;animation:spin 1s linear infinite;margin:20px auto}@keyframes spin{to{transform:rotate(360deg)}}#toast{position:fixed;bottom:30px;left:50%;transform:translateX(-50%);max-width:calc(100% - 30px);padding:14px 22px;background:#f3eefc;color:#272033;border-radius:14px;font-size:14px;z-index:20;box-shadow:0 8px 40px #0006;display:none}.offline-banner{background:#623d25;padding:10px;text-align:center;font-size:14px}.history-card{display:flex;justify-content:space-between;gap:16px;margin:12px 0;padding:22px}.history-card strong{font-size:24px;color:var(--green)}footer{color:#787585;text-align:center;font-size:12px;padding:30px 0}.rule-list{padding-left:20px;color:var(--muted);line-height:1.9}.row-buttons{display:flex;gap:12px;margin-top:20px}.row-buttons>*{flex:1}.rules-table{width:100%;border-collapse:collapse;font-size:14px}.rules-table td,.rules-table th{padding:12px 8px;border-bottom:1px solid var(--line);text-align:left}.rules-table th{color:var(--purple)}
@media(min-width:1100px){.container{padding-top:10px}.feature{min-height:335px}}@media(max-width:760px){header{height:72px;padding:0 20px}.brand{font-size:21px}.brand small{display:none}nav{position:fixed;bottom:0;left:0;right:0;height:calc(65px + env(safe-area-inset-bottom));padding:0 12px env(safe-area-inset-bottom);background:#15151e;z-index:10;border-top:1px solid var(--line);justify-content:space-around;gap:0}nav button{padding:16px 12px;font-size:14px}.install{font-size:12px;padding:8px 12px}.container{margin:24px auto;padding:0 18px calc(90px + env(safe-area-inset-bottom))}.intro{margin-bottom:24px}.intro .tag{display:none}h1{font-size:28px}.intro p{font-size:14px}.layout{grid-template-columns:1fr;gap:20px}.card{padding:22px}.setup{padding:4px 20px 22px}.side .feature{display:none}.side .card{padding:20px}.section-label{margin-top:22px}.choice{font-size:14px}.segments{gap:6px}.segments .choice{font-size:13px}.two{gap:12px}.answers{grid-template-columns:1fr}.answer{min-height:62px;padding:14px 16px}.listen{padding:18px}.clock{width:133px;height:133px}.clock strong{font-size:39px}.game-top{font-size:14px}.player{padding:12px}.player strong{font-size:24px}.scoreboard{gap:10px;margin:16px 0}.waiting{padding:22px 18px}.room-code{font-size:38px;letter-spacing:7px}.room-players{gap:10px}.result-heading .big{font-size:58px}.library-top{display:block}.library-top input{max-width:none}.library-top .tag{margin-top:12px}.song-badge{max-width:90px;white-space:normal;font-size:11px}.song-row{gap:8px}.song-num{width:24px}.game .footnote{margin:12px 0}.rule-block{margin:20px 0}footer{padding:20px 0}}@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}

.install-dialog{width:min(440px,calc(100% - 32px));border:1px solid #435044;border-radius:20px;background:#171d19;color:#eef4ef;padding:24px;box-sizing:border-box}.install-dialog::backdrop{background:#000a}.install-dialog p{line-height:1.8;overflow-wrap:anywhere;color:#b9c6bb}.install-dialog button{margin:8px 8px 0 0}.apk-download{display:block;text-align:center;text-decoration:none;padding:14px;border-radius:12px}

/* Keep the controls within the currently visible mobile viewport. */
@media(max-width:760px),(max-height:500px) and (max-width:1000px){
 body.in-round header,body.in-round footer{display:none}
 body.in-round .container{margin:0 auto;padding: max(8px,env(safe-area-inset-top)) max(12px,env(safe-area-inset-right)) max(8px,env(safe-area-inset-bottom)) max(12px,env(safe-area-inset-left));height:100vh;height:100dvh;min-height:380px}
 body.in-round .game{height:100%;display:grid;grid-template-rows:40px 68px minmax(94px,1fr) minmax(128px,28%) 46px;gap:8px;position:relative}
 body.in-round .game-top{margin:0;font-size:13px;gap:6px}
 body.in-round .game-top .text-button{min-height:40px;padding:8px 0}
 body.in-round .game-top .tag{font-size:11px;padding:5px 8px}
 body.in-round .scoreboard{margin:0;gap:8px;min-width:0}
 body.in-round .player{height:68px;padding:8px 12px;display:grid;grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:2px 8px;min-width:0;border-radius:12px}
 body.in-round .player-name{font-size:12px}
 body.in-round .player strong{grid-column:2;grid-row:1 / 3;font-size:25px;margin:0;letter-spacing:-1px}
 body.in-round .player small{font-size:10px;line-height:1.3;white-space:nowrap}
 body.in-round .vs{font-size:12px}
 body.in-round .listen{min-height:0;padding:10px 16px;display:grid;grid-template-columns:90px minmax(0,1fr);grid-template-rows:1fr 1fr;gap:0 14px;align-items:center;border-radius:16px}
 body.in-round .clock{grid-row:1 / 3;width:86px;height:86px;margin:0;justify-self:center}
 body.in-round .clock strong{font-size:30px;letter-spacing:-1px}
 body.in-round .clock small{font-size:10px;letter-spacing:0}
 body.in-round .listen .wave{display:none}
 body.in-round .listen h2{font-size:16px;margin:0;align-self:end;line-height:1.4;overflow:hidden;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow-wrap:anywhere}
 body.in-round .listen p{font-size:11px;line-height:1.5;margin:4px 0 0;align-self:start;overflow:hidden;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical}
 body.in-round .listen .spinner{grid-row:1 / 3;margin:0;justify-self:center}
 body.in-round .answers{grid-template-columns:repeat(2,minmax(0,1fr));grid-template-rows:repeat(2,minmax(0,1fr));margin:0;gap:8px;min-height:0}
 body.in-round .answer{min-height:0;min-width:0;padding:8px;gap:7px;border-radius:12px;font-size:14px;line-height:1.35}
 body.in-round .answer .letter{width:25px;height:28px;font-size:12px}
 body.in-round .answer-label{font-size:clamp(11px,3.6vw,15px);line-height:1.3;max-height:100%;overflow:auto;scrollbar-width:none}
 body.in-round .status,body.in-round .game>.footnote{margin:0;padding:4px 6px;font-size:11px;line-height:1.5;align-self:center;max-height:46px;overflow:hidden}
 body.in-round .status span{font-size:10px}
 body.in-round .notice{position:absolute;top:40px;left:0;right:0;z-index:3;margin:0;padding:8px;font-size:12px}
 body.in-round .offline-banner{position:fixed;top:0;left:0;right:0;z-index:30;font-size:11px;padding:4px}
}
@media(max-height:500px) and (min-width:600px){
 body.in-round .game{max-width:900px;grid-template-columns:1fr 1.35fr;grid-template-rows:36px 60px minmax(94px,1fr) 38px;gap:6px 12px}
 body.in-round .game-top{grid-column:1 / 3}
 body.in-round .scoreboard{grid-column:1;grid-row:2}
 body.in-round .player{height:60px;padding:6px 10px}
 body.in-round .listen{grid-column:1;grid-row:3}
 body.in-round .answers{grid-column:2;grid-row:2 / 4}
 body.in-round .status,body.in-round .game>.footnote{grid-column:1 / 3;grid-row:4}
}