:root{--primary:#02BFE3;--primary-light:#02BFE3;--primary-dark:#062F3D;--primary-soft:#E8F9FC;--accent:#E96D6F;--accent-soft:#FFF0EF;--bg:#FFFFFF;--card:#fff;--text:#062F3D;--muted:#667085;--line:#D0E6EC;--shadow:0 16px 45px rgba(16,60,76,.10)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font-family:Inter,ui-sans-serif,system-ui,-apple-system,"Segoe UI",sans-serif;line-height:1.55}.muscle-app{min-height:100vh;padding:34px 34px 88px}.app-topbar{width:min(1260px,100%);margin:0 auto 24px;display:grid;grid-template-columns:auto 1fr auto;gap:16px;align-items:center}.round-button{width:46px;height:46px;border-radius:50%;display:grid;place-items:center;background:#fff;border:1px solid var(--line);color:var(--primary-dark);font-size:2rem;line-height:1;text-decoration:none;box-shadow:0 8px 22px rgba(16,60,76,.07)}.top-kicker,.eyebrow{display:block;color:var(--accent);font-size:.76rem;font-weight:900;letter-spacing:.12em;text-transform:uppercase}.app-topbar h1{margin:2px 0 0;font-size:clamp(1.35rem,2.5vw,2rem);letter-spacing:-.035em;line-height:1.15;color:var(--primary-dark)}.list-toggle{min-height:44px;border:0;border-radius:14px;background:var(--primary);color:#fff;padding:0 18px;font:inherit;font-weight:850;cursor:pointer;display:none}.app-layout{width:min(1260px,100%);margin:auto;display:grid;grid-template-columns:390px minmax(0,1fr);gap:22px;align-items:start}.library-panel,.detail-panel{background:#fff;border:1px solid var(--line);border-radius:26px;box-shadow:var(--shadow)}.library-panel{position:sticky;top:20px;padding:22px;max-height:calc(100vh - 40px);overflow:hidden;display:flex;flex-direction:column}.library-heading{display:flex;align-items:end;justify-content:space-between;gap:16px}.library-heading h2{font-size:1.45rem;line-height:1.15;margin:5px 0 0;color:var(--primary-dark);letter-spacing:-.03em}.muscle-count{white-space:nowrap;border-radius:999px;background:var(--primary-soft);color:var(--primary-dark);font-size:.82rem;font-weight:850;padding:7px 10px}.search-box{display:grid;grid-template-columns:auto 1fr;align-items:center;gap:9px;margin-top:18px;padding:0 14px;border:1px solid var(--line);border-radius:14px;background:var(--bg);color:var(--primary)}.search-box span{font-size:1.45rem}.search-box input{width:100%;height:48px;border:0;outline:0;background:transparent;color:var(--text);font:inherit}.region-filters{display:flex;gap:8px;overflow:auto;padding:15px 0 13px;scrollbar-width:none}.region-filters::-webkit-scrollbar{display:none}.region-chip{border:1px solid var(--line);background:#fff;color:var(--muted);padding:9px 12px;border-radius:999px;font:inherit;font-size:.78rem;font-weight:800;white-space:nowrap;cursor:pointer}.region-chip.active{background:var(--primary);border-color:var(--primary);color:#fff}.muscle-list{overflow:auto;padding-right:3px;display:grid;gap:9px}.muscle-list::-webkit-scrollbar{width:5px}.muscle-list::-webkit-scrollbar-thumb{background:#BFDDE4;border-radius:9px}.muscle-item{width:100%;display:grid;grid-template-columns:66px 1fr auto;align-items:center;gap:13px;border:1px solid transparent;border-radius:17px;background:var(--bg);padding:9px;text-align:left;color:inherit;font:inherit;cursor:pointer}.muscle-item:hover,.muscle-item.active{border-color:#A8D8E2;background:#E8F9FC}.muscle-item img{width:66px;height:66px;border-radius:13px;object-fit:contain;background:#fff}.muscle-item b{display:block;color:var(--primary-dark);font-size:.94rem}.muscle-item small{display:block;color:var(--muted);font-size:.78rem;margin-top:2px}.muscle-item>span{color:var(--primary);font-size:1.4rem}.empty-list{padding:28px 12px;text-align:center;color:var(--muted)}
.detail-panel{padding:18px;min-height:760px}.detail-tabs{display:grid;grid-template-columns:repeat(2,1fr);background:var(--primary-soft);padding:5px;border-radius:17px;margin-bottom:18px}.detail-tab{border:0;background:transparent;color:#536887;min-height:48px;border-radius:13px;font:inherit;font-weight:850;cursor:pointer}.detail-tab.active{background:var(--primary);color:#fff;box-shadow:0 8px 20px rgba(46,150,170,.25)}.muscle-hero{position:relative;display:grid;grid-template-columns:minmax(250px,.85fr) 1.15fr;gap:28px;align-items:center;border:1px solid var(--line);border-radius:24px;padding:24px;background:linear-gradient(145deg,#fff 60%,#EDF8FA);overflow:hidden}.muscle-hero-image{width:100%;height:430px;object-fit:contain;border-radius:20px;background:#fff}.region-label{display:inline-flex;padding:7px 11px;border-radius:999px;background:var(--primary-soft);color:var(--primary);font-size:.78rem;font-weight:900;text-transform:uppercase}.muscle-hero h2{font-size:clamp(2rem,4vw,3.5rem);line-height:1.02;letter-spacing:-.055em;color:var(--primary-dark);margin:15px 0 7px}.english-name{font-size:1.25rem;color:var(--muted);margin:0 0 14px}.memory-highlight{border:1px solid #F7CBBB;border-left:5px solid var(--accent);border-radius:16px;background:var(--accent-soft);padding:15px 17px}.memory-highlight span{display:block;color:#B84D31;font-size:.75rem;font-weight:950;letter-spacing:.08em;text-transform:uppercase;margin-bottom:5px}.memory-highlight p{color:var(--text);margin:0}.info-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:16px}.info-card{border:1px solid var(--line);border-radius:18px;background:#fff;padding:19px;box-shadow:0 9px 24px rgba(16,60,76,.05)}.info-card.wide,.pilates-placeholder.wide{grid-column:1/-1}.info-icon{width:39px;height:39px;border-radius:12px;display:grid;place-items:center;background:var(--primary-soft);color:var(--primary);font-weight:950;margin-bottom:11px}.info-card h3{font-size:1rem;color:var(--primary-dark);margin:0 0 6px}.info-card p{color:var(--muted);margin:0;white-space:pre-line}.function-list{margin:0;padding-left:20px;color:var(--muted)}.function-list li+li{margin-top:6px}.pilates-placeholder{min-height:200px;border:2px dashed #A8D8E2;border-radius:20px;background:var(--primary-soft);display:grid;place-items:center;align-content:center;gap:8px;color:#6B7D99;text-align:center}.placeholder-icon{width:50px;height:50px;border-radius:50%;display:grid;place-items:center;background:#fff;color:var(--primary);font-size:1.8rem}.quiz-head{padding:10px 6px 20px}.quiz-head h2{font-size:clamp(1.7rem,3vw,2.6rem);color:var(--primary-dark);letter-spacing:-.04em;margin:5px 0}.quiz-head p{margin:0;color:var(--muted)}.mobile-study-nav{display:none}
@media(max-width:1000px){.app-layout{grid-template-columns:330px minmax(0,1fr)}.muscle-hero{grid-template-columns:1fr}.muscle-hero-image{height:340px}.exercise-grid{grid-template-columns:1fr}.exercise-card img{height:auto;max-height:420px}}
@media(max-width:760px){body{background:#fff}.muscle-app{padding:84px 12px 92px}.app-topbar{grid-template-columns:auto 1fr auto;margin-bottom:14px}.app-topbar h1{font-size:1.12rem}.top-kicker{display:none}.list-toggle{display:block;padding:0 12px;font-size:.82rem}.app-layout{display:block}.library-panel,.detail-panel{border-radius:22px;box-shadow:none}.library-panel{display:none;position:static;max-height:none;padding:16px}.mobile-list-open .library-panel{display:flex}.mobile-list-open .detail-panel{display:none}.detail-panel{padding:8px;border:0;min-height:0}.detail-tabs{position:sticky;top:76px;z-index:8}.muscle-hero{display:block;padding:14px}.muscle-hero-image{height:370px}.muscle-hero-copy{padding:17px 6px 5px}.muscle-hero h2{font-size:2.25rem}.english-name{font-size:1.05rem}.info-grid{grid-template-columns:1fr}.info-card.wide{grid-column:auto}.quiz-image{height:330px}.quiz-options{grid-template-columns:1fr}.mobile-study-nav{position:fixed;z-index:15;left:0;right:0;bottom:0;display:grid;grid-template-columns:repeat(3,1fr);background:#fff;border-top:1px solid var(--line);padding:7px 8px max(7px,env(safe-area-inset-bottom));box-shadow:0 -10px 28px rgba(16,60,76,.08)}.mobile-study-nav button{border:0;background:transparent;color:#6B7D99;font:inherit;font-size:.75rem;font-weight:800;display:grid;gap:2px;place-items:center}.mobile-study-nav button span{font-size:1.25rem}.mobile-study-nav button.active{color:var(--primary)}}
@media(max-width:420px){.muscle-app{padding-left:8px;padding-right:8px}.app-topbar{gap:9px}.round-button{width:40px;height:40px}.list-toggle{min-height:40px}.muscle-hero-image{height:330px}.detail-tab{min-height:44px}.exercise-card img{height:auto}.quiz-image{height:290px}}
.arena-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}.arena-game-card{border:1px solid var(--line);border-radius:24px;padding:24px;background:#fff;box-shadow:var(--shadow);display:flex;flex-direction:column;min-height:390px}.arena-game-card.image-game{background:linear-gradient(145deg,#fff,#E8F9FC)}.arena-game-card.match-game{background:linear-gradient(145deg,#fff,#FFF0EB)}.game-visual{width:76px;height:76px;border-radius:22px;display:grid;place-items:center;background:var(--primary);color:#fff;font-size:1.5rem;font-weight:950;box-shadow:0 12px 24px rgba(46,150,170,.25);margin-bottom:20px}.match-game .game-visual{background:var(--accent);box-shadow:0 12px 24px rgba(242,140,111,.26)}.game-type{color:var(--primary);font-size:.76rem;font-weight:950;letter-spacing:.08em;text-transform:uppercase}.arena-game-card h3{color:var(--primary-dark);font-size:1.48rem;line-height:1.15;margin:8px 0}.arena-game-card p{color:var(--muted);margin:0 0 18px}.coin-prize{color:#9A5D00;background:#FFF6D8;border-radius:12px;padding:9px 11px;font-size:.82rem;font-weight:900;margin-top:auto}.arena-game-card>button,.arena-result>button{min-height:50px;border:0;border-radius:14px;background:var(--primary);color:#fff;font:inherit;font-weight:950;cursor:pointer;margin-top:14px}.match-game>button{background:var(--accent)}.reward-note{text-align:center;color:var(--muted);font-size:.84rem;margin:18px 0 3px}.countdown-screen{min-height:620px;border-radius:24px;background:radial-gradient(circle at 50% 35%,#02BFE3,var(--primary-dark) 72%);color:#fff;display:grid;place-items:center;align-content:center;text-align:center}.countdown-screen span{font-weight:950;letter-spacing:.14em;text-transform:uppercase}.countdown-screen strong{font-size:9rem;line-height:1;margin:15px}.countdown-screen p{margin:0;color:#DCE7FA}.arena-top{display:flex;justify-content:space-between;gap:12px;margin-bottom:12px}.arena-back,.sound-toggle{border:1px solid var(--line);background:#fff;color:var(--primary-dark);border-radius:13px;min-height:42px;padding:0 14px;font:inherit;font-weight:850;cursor:pointer}.sound-toggle{width:46px;padding:0}.arena-play{border:1px solid var(--line);border-radius:24px;padding:22px;background:#fff}.play-status{display:grid;grid-template-columns:1fr auto auto;align-items:center;gap:12px;color:var(--primary-dark)}.arena-score{color:var(--primary);font-weight:900}.arena-timer{min-width:55px;text-align:center;border-radius:999px;background:var(--accent-soft);color:#B84D31;padding:6px 9px;font-weight:950}.timer-track{height:7px;border-radius:999px;background:var(--primary-soft);overflow:hidden;margin:12px 0 18px}.timer-track i{display:block;height:100%;border-radius:inherit;background:linear-gradient(90deg,var(--primary),var(--accent));transition:width 1s linear}.arena-muscle-image{width:min(100%,480px);height:365px;object-fit:contain;display:block;margin:auto;background:#fff}.arena-play>h2,.match-play header h2{color:var(--primary-dark);text-align:center;font-size:1.55rem;margin:12px 0 17px}.arena-options{display:grid;grid-template-columns:1fr 1fr;gap:10px}.arena-options button{min-height:61px;border:1px solid var(--line);border-radius:15px;background:#fff;color:var(--primary-dark);font:inherit;font-weight:900;padding:9px 13px;cursor:pointer}.arena-options button small{display:block;color:var(--muted);font-weight:650}.arena-options button:hover{border-color:var(--primary);background:var(--primary-soft)}.arena-options button.correct{border-color:#3FA575;background:#E8F8F0;color:#176641}.arena-options button.wrong{border-color:var(--accent);background:var(--accent-soft);color:#9B3F28}.answer-feedback,.match-feedback{min-height:30px;text-align:center;font-weight:900;margin-top:12px}.answer-feedback.good,.match-feedback.good{color:#21805A}.answer-feedback.bad,.match-feedback.bad{color:#B84D31}.match-play header{text-align:center;margin:18px 0}.match-board{display:grid;grid-template-columns:1fr 1.3fr;gap:14px}.match-column{display:grid;gap:8px;align-content:start}.match-column h3{margin:0 0 3px;color:var(--primary-dark);font-size:.95rem}.match-column button{min-height:62px;border:1px solid var(--line);border-radius:13px;background:#fff;color:var(--text);font:inherit;text-align:left;padding:10px 12px;cursor:pointer}.match-column button b,.match-column button small{display:block}.match-column button small{color:var(--muted)}.match-column button.selected{border-color:var(--primary);background:var(--primary-soft);box-shadow:0 0 0 2px rgba(46,150,170,.16)}.match-column button.matched{border-color:#3FA575;background:#E8F8F0;color:#176641;opacity:.62}.shake{animation:arena-shake .28s ease}.arena-result{min-height:600px;border:1px solid var(--line);border-radius:24px;padding:34px;background:linear-gradient(150deg,#fff,var(--primary-soft));display:flex;flex-direction:column;justify-content:center;text-align:center}.result-icon{font-size:4.4rem}.arena-result h2{color:var(--primary-dark);font-size:clamp(1.8rem,4vw,3rem);margin:7px 0 20px}.result-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-bottom:15px}.result-stats div{border-radius:16px;background:#fff;border:1px solid var(--line);padding:16px 8px}.result-stats strong,.result-stats span{display:block}.result-stats strong{color:var(--primary-dark);font-size:1.45rem}.result-stats span{color:var(--muted);font-size:.78rem}.arena-result p{color:var(--muted)}.arena-result p a{color:var(--primary);font-weight:900}.arena-result>button{width:min(100%,340px);margin-left:auto;margin-right:auto}.arena-result>button.secondary{background:#fff;color:var(--primary-dark);border:1px solid var(--line);margin-top:9px}@keyframes arena-shake{25%{transform:translateX(-6px)}75%{transform:translateX(6px)}}
@media(max-width:1000px){.arena-grid{grid-template-columns:1fr}}
/* Compact spacing without changing course content */
@media(min-width:761px){.muscle-app{padding:24px 24px 64px}.app-topbar{margin-bottom:16px}.app-layout{gap:16px}.library-panel{padding:18px}.detail-panel{padding:14px}.muscle-hero{gap:20px;padding:18px}.info-grid{gap:12px;margin-top:12px}.info-card{padding:16px}.arena-game-card{padding:20px;min-height:350px}}
@media(max-width:760px){.info-card.wide,.pilates-placeholder.wide{grid-column:auto}.arena-play{padding:14px}.arena-muscle-image{height:310px}.arena-options{grid-template-columns:1fr}.match-board{grid-template-columns:1fr}.match-column button{min-height:54px}.result-stats{grid-template-columns:1fr}.mobile-study-nav{grid-template-columns:repeat(2,1fr)}}
@media(max-width:420px){.arena-muscle-image{height:270px}.countdown-screen{min-height:520px}}
.english-pronunciation{display:flex;align-items:center;gap:8px;margin:0 0 14px}.english-pronunciation .english-name{margin:0}.pronunciation-button{width:36px;height:36px;flex:0 0 36px;border:1px solid #A8D8E2;border-radius:50%;display:grid;place-items:center;background:#fff;color:var(--primary);cursor:pointer;transition:background .18s ease,color .18s ease,transform .18s ease}.pronunciation-button:hover,.pronunciation-button:focus-visible,.pronunciation-button.is-playing{background:var(--primary);color:#fff;transform:scale(1.05)}.pronunciation-button svg{width:19px;height:19px;fill:currentColor}.pronunciation-button svg path+path{fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round}.pronunciation-button.is-playing{box-shadow:0 0 0 5px rgba(46,150,170,.15)}
.muscle-app.is-auth-checking>*{visibility:hidden}.muscle-app.is-auth-checking::before{content:"Đang kiểm tra tài khoản Member…";position:fixed;inset:0;display:grid;place-items:center;background:var(--bg);color:var(--primary-dark);font-weight:900;z-index:50}.member-gate{width:min(760px,calc(100% - 24px));min-height:620px;margin:52px auto;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;border:1px solid var(--line);border-radius:30px;padding:42px;background:radial-gradient(circle at 50% 10%,#E8F9FC,#fff 62%);box-shadow:var(--shadow)}.gate-icon{width:92px;height:92px;border-radius:28px;display:grid;place-items:center;background:linear-gradient(145deg,var(--primary-light),var(--primary));color:#fff;font-size:2rem;font-weight:950;box-shadow:0 16px 34px rgba(46,150,170,.25);margin-bottom:22px}.member-gate h1{color:var(--primary-dark);font-size:clamp(2rem,5vw,3.5rem);line-height:1.05;letter-spacing:-.05em;margin:8px 0 15px}.member-gate p{max-width:590px;color:var(--muted);font-size:1.05rem;margin:0}.gate-actions{display:flex;gap:12px;margin-top:26px}.gate-actions a{min-height:52px;padding:0 22px;border-radius:15px;display:inline-flex;align-items:center;justify-content:center;text-decoration:none;font-weight:950}.gate-primary{background:var(--accent);color:#fff}.gate-secondary{border:1px solid var(--primary);color:var(--primary);background:#fff}.gate-back{color:var(--muted);font-weight:800;text-decoration:none;margin-top:21px}.function-question{min-height:290px;border-radius:22px;background:linear-gradient(145deg,var(--primary-soft),#fff);display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:28px}.function-question span{color:var(--accent);font-size:.78rem;font-weight:950;letter-spacing:.1em;text-transform:uppercase}.function-question strong{color:var(--primary-dark);font-size:clamp(2rem,5vw,3.4rem);line-height:1.04;margin:12px 0 4px}.function-question small{color:var(--muted);font-size:1rem}.arena-options.function-options button{text-align:left;font-weight:750}.four-games .arena-game-card{min-height:400px}@media(max-width:760px){.member-gate{margin:8px auto;min-height:calc(100vh - 110px);padding:28px 18px}.gate-actions{width:100%;display:grid}.gate-actions a{width:100%}.function-question{min-height:220px}.four-games .arena-game-card{min-height:360px}}@media(prefers-reduced-motion:reduce){.shake{animation:none}.countdown-screen strong{transition:none}*{scroll-behavior:auto!important}}
.arena-zalo{margin:0 0 18px;padding:13px 16px;border:1px solid #B8DDE5;border-radius:16px;background:linear-gradient(135deg,#F0FAFC,#fff);color:var(--primary-dark)!important;text-align:center;font-weight:800;line-height:1.5}.arena-zalo a{color:#1675D1!important;font-weight:950;text-decoration:underline;text-underline-offset:3px}.game-card-actions{display:grid;grid-template-columns:1fr 1fr;gap:9px;margin-top:14px}.game-card-actions button,.arena-leaderboard>button{min-height:48px;border:0;border-radius:14px;background:var(--primary);color:#fff;font:inherit;font-weight:950;cursor:pointer}.game-card-actions button.secondary,.arena-leaderboard>button.secondary{border:1px solid var(--line);background:#fff;color:var(--primary-dark)}.match-game .game-card-actions button:first-child{background:var(--accent)}.arena-leaderboard{min-height:600px;border:1px solid var(--line);border-radius:24px;padding:28px;background:linear-gradient(150deg,#fff,var(--primary-soft));text-align:center}.arena-leaderboard h2{color:var(--primary-dark);font-size:clamp(1.8rem,4vw,3rem);margin:8px 0 20px}.leaderboard-loading,.leaderboard-empty{padding:28px;color:var(--muted);text-align:center}.leaderboard-list{display:grid;gap:8px;text-align:left;margin:14px 0 18px}.leaderboard-row{display:grid;grid-template-columns:42px minmax(0,1fr) auto auto;align-items:center;gap:10px;padding:12px 14px;border:1px solid var(--line);border-radius:14px;background:#fff}.leaderboard-row.is-current{border-color:var(--accent);background:var(--accent-soft)}.leaderboard-rank{display:grid;place-items:center;width:34px;height:34px;border-radius:10px;background:var(--primary-soft);color:var(--primary-dark);font-weight:950}.leaderboard-row strong{min-width:0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;color:var(--primary-dark)}.leaderboard-row>span:nth-child(3){color:var(--muted);font-size:.82rem}.leaderboard-row>b{color:var(--primary);white-space:nowrap}.leaderboard-mine{padding:12px;border-radius:13px;background:#fff;color:var(--primary-dark)!important}.result-leaderboard{margin:10px 0 16px;padding:15px;border:1px solid var(--line);border-radius:18px;background:rgba(255,255,255,.72)}.result-leaderboard h3{margin:0;color:var(--primary-dark)}
@media(max-width:760px){.game-card-actions{grid-template-columns:1fr}.leaderboard-row{grid-template-columns:36px minmax(0,1fr) auto;padding:10px}.leaderboard-row>span:nth-child(3){display:none}.leaderboard-row>b{font-size:.82rem}.arena-leaderboard{padding:18px 12px}.arena-zalo{font-size:.84rem;padding:11px}}
.game-card-title{display:grid;grid-template-columns:56px minmax(0,1fr);align-items:center;gap:12px;margin-bottom:10px}.game-card-title .game-visual{width:56px;height:56px;margin:0;border-radius:16px;font-size:1.2rem}.game-card-title h3{margin:0;line-height:1.2}.stott-game .game-card-actions{margin-top:auto}.stott-game .game-card-actions a{display:grid;place-items:center;min-height:48px;border-radius:14px;background:var(--primary);color:#fff;text-decoration:none;font-weight:950}.stott-game{min-height:0}