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:root{--space-1:.25rem;--space-2:.5rem;--space-3:.75rem;--space-4:1rem;--space-5:1.25rem;--space-6:1.5rem;--space-8:2rem;--space-10:2.5rem;--space-12:3rem;--font-sans:"Avenir Next", "Segoe UI", Arial, sans-serif;--text-xs:.75rem;--text-sm:.875rem;--text-base:1rem;--text-lg:1.125rem;--text-xl:1.375rem;--text-2xl:1.75rem;--text-3xl:2.25rem;--leading-tight:1.2;--leading-normal:1.5;--radius-sm:.5rem;--radius-md:.75rem;--radius-lg:1.25rem;--radius-pill:999px;--elevation-1:0 2px 8px #2b272314;--elevation-2:0 12px 32px #2b27231f;--content-max:34rem;--touch-target:3rem;--answer-target:3.5rem;--color-background:#f5f4ef;--color-surface:#fff;--color-primary:#354e75;--color-primary-foreground:#fff;--color-correct:#23744d;--color-correct-foreground:#fff;--color-incorrect:#b53b42;--color-incorrect-foreground:#fff;--color-muted:#626b73;--color-text:#172a3c;--color-border:#d8dfe4;--color-focus:#143f79;--color-tint:#edf2f7;--color-rail:#f1f3f5;--color-selected:#fff;--color-selected-text:#253d60;--color-glow:#e5ecea;--color-success-tint:#ecf6ef;--color-button-shadow:#dce2e8;--color-primary-hover:#294265}:root[data-theme=dark]{--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark;--color-background:#141d2b;--color-surface:#202d3f;--color-primary:#b3ccec;--color-primary-foreground:#142239;--color-text:#edf3fb;--color-muted:#b2c0d1;--color-border:#42536a;--color-focus:#9dc5ff;--color-correct:#83d8aa;--color-incorrect:#ffa5ad;--color-tint:#2b3d54;--color-rail:#182437;--color-selected:#3c526e;--color-selected-text:#f3f7fc;--color-glow:#263e4d;--color-success-tint:#203f35;--color-button-shadow:#0f1825;--color-primary-hover:#c8dcf5}
:root{--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light;font-family:var(--font-sans);background:var(--color-background);color:var(--color-text);font-size:var(--text-base);line-height:var(--leading-normal)}*{box-sizing:border-box}body{min-height:100vh;margin:0}html{min-width:0}button,input,select,textarea{font:inherit}.app-shell{flex-direction:column;min-height:100dvh;display:flex}.app-shell__header{width:100%;padding-block:max(var(--space-4), env(safe-area-inset-top)) var(--space-4);padding-inline:max(var(--space-4), env(safe-area-inset-left)) max(var(--space-4), env(safe-area-inset-right))}.app-shell__header-inner,.app-shell__main{width:100%;max-width:var(--content-max);margin-inline:auto}.app-shell__header-inner{align-items:center;gap:var(--space-3);display:flex}.app-shell__mark{border-radius:var(--radius-md);background:var(--color-primary);width:2.5rem;height:2.5rem;color:var(--color-primary-foreground);font-size:var(--text-xl);box-shadow:var(--elevation-1);flex:none;place-items:center;font-weight:700;line-height:1;display:grid}.app-shell__brand{font-size:var(--text-lg);letter-spacing:-.02em;font-weight:700;line-height:var(--leading-tight)}.app-shell__main{min-width:0;padding-block:var(--space-4) max(var(--space-8), env(safe-area-inset-bottom));padding-inline:max(var(--space-4), env(safe-area-inset-left)) max(var(--space-4), env(safe-area-inset-right));flex:1}.page-transition{position:relative}.home-intro{width:100%;padding:var(--space-6) var(--space-4);border:1px solid var(--color-border);border-radius:var(--radius-lg);background:var(--color-surface);box-shadow:var(--elevation-1)}.home-intro h1{margin:0 0 var(--space-3);font-size:clamp(var(--text-2xl), 7vw, var(--text-3xl));line-height:var(--leading-tight)}.home-intro p{color:var(--color-muted);margin:0}.button{justify-content:center;align-items:center;gap:var(--space-2);min-height:var(--touch-target);max-width:100%;padding:var(--space-2) var(--space-5);border-radius:var(--radius-md);font-size:var(--text-base);font-weight:700;line-height:var(--leading-tight);text-align:center;cursor:pointer;touch-action:manipulation;-webkit-tap-highlight-color:transparent;border:1px solid #0000;transition:background-color .12s,border-color .12s,box-shadow .12s,transform 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var(--space-6)}.app-shell__main{padding-block:var(--space-10) max(var(--space-12), env(safe-area-inset-bottom))}.home-intro{padding:var(--space-8)}}@media (max-width:360px),(max-height:430px){.app-shell__main{padding-top:var(--space-2)}.home-intro{padding:var(--space-5) var(--space-4)}}@media (prefers-reduced-motion:reduce){.button{transition:none}}.exercise-setup,.practice-preview{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-lg);padding:var(--space-5) var(--space-4)}.exercise-setup h1,.practice-preview h1{margin:0 0 var(--space-2);font-size:var(--text-2xl);line-height:var(--leading-tight)}.muted{color:var(--color-muted)}.exercise-setup>p{margin:0 0 var(--space-5)}.segmented-control{margin:0 0 var(--space-4);border:0;min-width:0;padding:0}.segmented-control legend{margin-bottom:var(--space-2);font-weight:700}.segmented-control__options{gap:var(--space-2);display:flex}.segmented-control__options label{flex:1;min-width:0;position:relative}.segmented-control input{z-index:1;opacity:0;cursor:pointer;width:100%;height:100%;margin:0;position:absolute;inset:0}.segmented-control span{min-height:var(--touch-target);padding:var(--space-2);border:1px solid var(--color-border);border-radius:var(--radius-sm);cursor:pointer;font-size:var(--text-sm);justify-content:center;align-items:center;display:flex}.segmented-control input:checked+span{background:var(--color-primary);color:var(--color-primary-foreground);border-color:var(--color-primary);font-weight:700}.segmented-control input:focus-visible+span{outline:3px solid var(--color-focus);outline-offset:2px}.segmented-control input:active+span{opacity:.8}.exercise-summary{font-size:var(--text-sm);color:var(--color-muted);margin:var(--space-4) 0}.start-button{width:100%}.music-staff{margin:var(--space-4) 0;width:100%}.music-staff__drawing{width:100%;min-height:216px}.music-staff svg{width:100%;max-width:100%;height:216px;display:block}.preview-actions{gap:var(--space-3);flex-wrap:wrap;display:flex}.preview-actions .button{flex:1}.sr-only{clip-path:inset(50%);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.skip-link{background:var(--color-surface);z-index:20;padding:.75rem;position:absolute;top:-5rem;left:1rem}.skip-link:focus{top:1rem}.header-settings{color:var(--color-primary);border-radius:var(--radius-sm);margin-inline-start:auto;padding:.75rem}a:focus-visible,h1:focus-visible{outline:3px solid var(--color-focus);outline-offset:3px}.is-practicing{overflow:hidden}.is-practicing .app-shell__header{display:none}.is-practicing .app-shell__main{padding-top:max(.5rem, env(safe-area-inset-top));padding-bottom:max(.5rem, env(safe-area-inset-bottom))}.practice-session{height:calc(100dvh - max(1rem, env(safe-area-inset-top)) - max(1rem, env(safe-area-inset-bottom)));grid-template-rows:auto minmax(0,1fr) auto auto;gap:.5rem;max-height:48rem;display:grid}.practice-topbar{font-size:var(--text-xl);font-variant-numeric:tabular-nums;justify-content:space-between;align-items:center;padding:.5rem;display:flex}.practice-topbar p{margin:0}.practice-topbar output{margin-left:.5rem;font-weight:700}.practice-staff-area{background:var(--color-surface);border-radius:var(--radius-lg);align-self:center;width:100%;position:relative}.practice-staff-area .music-staff{margin:0}.countdown{background:var(--color-surface);border-radius:var(--radius-lg);place-items:center;font-size:4rem;font-weight:700;display:grid;position:absolute;inset:0}.answer-grid{--wheel-size:clamp(224px, 33dvh, 280px);--wheel-button:60px;--wheel-radius:calc(var(--wheel-size) / 2 - var(--wheel-button) / 2 - 4px);width:var(--wheel-size);height:var(--wheel-size);margin-inline:auto;position:relative}.answer-grid:before{content:"";inset:calc(var(--wheel-button) / 2 + 4px);border:1px dashed 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0}.feedback-region{text-align:center;height:1.75rem}.feedback{pointer-events:none;font-weight:700}.feedback--correct{color:var(--color-correct)}.feedback--incorrect{color:var(--color-incorrect)}.practice-footer{justify-content:space-between;align-items:center;display:flex}.practice-footer .button{font-size:var(--text-sm)}dialog{border:1px solid var(--color-border);border-radius:var(--radius-lg);max-width:min(28rem,100% - 2rem);color:var(--color-text);background:var(--color-surface);padding:1.5rem}dialog::backdrop{background:#141e2880}.dialog-actions{flex-wrap:wrap;gap:.5rem;display:flex}.results-panel,.settings-panel{padding:var(--space-5);border-radius:var(--radius-lg);background:var(--color-surface);border:1px solid var(--color-border)}.results-panel h1,.settings-panel h1{font-size:var(--text-2xl);margin:0 0 .5rem}.result-config{text-transform:capitalize}.result-score{text-align:center;flex-direction:column;margin:1rem 0;display:flex}.result-score strong{color:var(--color-primary);font-size:4rem;line-height:1.2}.new-best{color:var(--color-correct);text-align:center;font-weight:700}.result-stats{grid-template-columns:1fr 1fr;gap:1rem;display:grid}.result-stats dt{font-size:var(--text-sm);color:var(--color-muted)}.result-stats dd{font-weight:700;font-size:var(--text-xl);margin:.25rem 0 0}.result-actions{flex-direction:column;gap:.75rem;margin-top:1.5rem;display:flex}@media (pointer:coarse),(max-width:600px){.answer-key,.keyboard-hint{display:none}}@media (max-height:480px) and (min-width:480px){.is-practicing .app-shell__main{max-width:52rem}.practice-session{grid-template-rows:auto 1fr auto;grid-template-columns:1fr 1fr;gap:.25rem 1rem}.practice-topbar,.practice-footer{grid-column:1/-1}.practice-staff-area{grid-row:2}.practice-staff-area svg{height:140px}.practice-staff-area .music-staff__drawing{min-height:140px}.practice-answer-area{align-self:center}}@media 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img{object-fit:contain;width:100%;height:100%;display:block}.header-settings{font-size:.875rem;font-weight:600;text-decoration:none}.exercise-setup{background:0 0;border:0;padding:0}.setup-hero{padding:4px 0 20px;position:relative;overflow:hidden}.eyebrow{color:var(--color-primary);text-transform:uppercase;letter-spacing:.14em;font-size:.65rem;font-weight:800}.setup-hero h1{letter-spacing:-.065em;margin:8px 0 6px;font-size:clamp(2.65rem,9vw,3rem);line-height:1.05}.setup-hero h1 span{color:#af643e}.hero-copy{color:var(--color-muted);max-width:34ch;margin:0;font-size:.94rem}.hero-notes{inset-inline-end:5px;color:var(--color-primary);opacity:.15;pointer-events:none;align-items:center;gap:6px;display:flex;position:absolute;bottom:15px;transform:rotate(-12deg)}.hero-notes span{font-family:Georgia,serif;font-size:4rem}.hero-notes span:nth-child(2){font-size:5.5rem;transform:translateY(-8px)}.setup-intro{background:var(--color-surface);border:1px solid var(--color-border);border-bottom:0;border-radius:22px 22px 0 0;justify-content:space-between;align-items:center;gap:12px;padding:18px 22px 14px;display:flex}.setup-intro h2{letter-spacing:-.035em;margin:0 0 4px;font-size:1.2rem}.setup-intro p{color:var(--color-muted);margin:0;font-size:.78rem}.duration-chip{white-space:nowrap;background:var(--color-tint);color:var(--color-primary);border-radius:99px;padding:6px 10px;font-size:.75rem;font-weight:700}.exercise-setup form{background:var(--color-surface);border:1px solid var(--color-border);border-radius:22px;padding:20px 22px 16px;box-shadow:0 14px 35px #24394a08}.segmented-control{margin-bottom:12px}.segmented-control legend{color:var(--color-muted);letter-spacing:.02em;font-size:.75rem}.segmented-control__options{background:var(--color-rail);border-radius:12px;gap:4px;padding:4px}.segmented-control span{border:0;border-radius:8px;min-height:44px;font-weight:600}.segmented-control input:checked+span{background:var(--color-surface);color:var(--color-selected-text);box-shadow:0 2px 8px #233b5420, 0 0 0 1px var(--color-border)}.setup-sound{border-top:1px solid var(--color-border);align-items:center;gap:12px;padding:6px 0;display:flex}.setup-sound>span{color:var(--color-muted);max-width:15ch;font-size:.72rem}.sound-toggle{border:1px solid var(--color-border);background:var(--color-tint);min-height:44px;color:var(--color-primary);white-space:nowrap;cursor:pointer;touch-action:manipulation;border-radius:99px;justify-content:center;align-items:center;gap:7px;padding:8px 11px;font-size:.73rem;font-weight:650;display:inline-flex}.sound-toggle[aria-checked=false]{background:var(--color-rail);color:var(--color-muted)}.sound-toggle:focus-visible,.hear-note:focus-visible{outline:3px solid var(--color-focus);outline-offset:3px}.exercise-summary{margin:7px 0 16px;font-size:.75rem;line-height:1.7}.start-button{min-height:52px;box-shadow:var(--elevation-1);border-radius:13px;justify-content:space-between;padding-inline:20px}.start-button span{font-size:1.4rem}.setup-tip{text-align:center;color:var(--color-muted);margin:12px 0 0;font-size:.67rem}.practice-topbar{gap:8px;padding:6px 4px}.score-display{flex-direction:column;display:flex}.stat-label{text-transform:uppercase;letter-spacing:.12em;color:var(--color-muted);font-size:.62rem;font-weight:700}.practice-topbar output{margin-left:0;font-size:1.8rem;line-height:1.1}.timer-display{letter-spacing:-.04em;font-size:1.65rem;font-weight:650}.timer-display--urgent{color:var(--color-incorrect)}.practice-staff-area{border:1px solid var(--color-border);border-radius:22px;overflow:hidden;box-shadow:0 8px 30px #233b5407}.round-progress{background:var(--color-rail);height:4px}.round-progress>div{background:var(--color-primary);transform-origin:0;height:100%;transition:transform .18s linear}.staff-caption{color:var(--color-muted);justify-content:space-between;padding:15px 16px 0;font-size:.65rem;display:flex}.staff-caption>span:first-child{text-transform:uppercase;letter-spacing:.12em;font-weight:700}.staff-toolbar{justify-content:space-between;align-items:center;gap:8px;padding:0 12px 8px 16px;display:flex}.staff-toolbar>span{color:var(--color-muted);font-size:.76rem;font-weight:600}.hear-note{background:var(--color-tint);min-height:44px;color:var(--color-primary);cursor:pointer;border:0;border-radius:10px;align-items:center;gap:6px;padding:8px 10px;font-size:.75rem;font-weight:600;display:inline-flex}.hear-note:disabled{opacity:.45;cursor:default}.answer-grid{gap:9px}.answer-grid .button{border-color:var(--color-border);box-shadow:0 3px 0 var(--color-button-shadow);border-radius:50%;min-height:44px;font-size:1.18rem}.answer-grid .button:not(:disabled):active{box-shadow:0 1px 0 var(--color-button-shadow);background:var(--color-tint);transform:translate(-50%,calc(2px - 50%))}.feedback-region{height:1.9rem;font-size:.84rem}.practice-footer .muted{font-size:.72rem}.practice-footer .button{color:var(--color-muted);background:0 0;border:0;padding:8px 10px;font-size:.75rem}.results-panel{text-align:center;border-radius:24px;padding:28px 22px;box-shadow:0 16px 40px #24394a08}.result-medallion{background:var(--color-tint);width:64px;height:64px;color:var(--color-primary);border-radius:50%;place-items:center;margin:0 auto 18px;font:2.5rem Georgia,serif;display:grid}.results-panel h1{letter-spacing:-.045em;margin-top:8px}.result-config{font-size:.8rem}.result-score{margin:22px 0 12px}.result-score strong{letter-spacing:-.06em;font-size:5rem}.result-score>span{color:var(--color-muted);font-size:.78rem}.result-message{color:var(--color-muted);max-width:31ch;margin:0 auto 22px;font-size:.85rem}.result-stats{text-align:start;gap:8px}.result-stats div{background:var(--color-rail);border-radius:12px;padding:14px}.result-stats dt{font-size:.72rem}.new-best{background:var(--color-success-tint);border-radius:99px;padding:7px 12px;font-size:.8rem;display:inline-block}.settings-panel{box-shadow:0 12px 30px #24394a08}.settings-panel h2{letter-spacing:-.025em;margin-top:28px;font-size:1.05rem}.settings-panel p{color:var(--color-muted);font-size:.9rem;line-height:1.65}.settings-section{border-block:1px solid var(--color-border);margin-top:24px;padding-block:4px 20px}@media (max-width:360px){.setup-hero{padding-bottom:20px}.setup-intro{padding:18px 16px 16px}.exercise-setup form{padding-inline:16px}.practice-topbar .sound-toggle{padding-inline:9px;font-size:.65rem}.staff-caption{padding-inline:12px}.staff-caption span:last-child{display:none}}@media (max-height:650px) and (max-width:479px){.practice-session{gap:.3rem}.staff-caption{display:none}.staff-toolbar{padding-bottom:4px}.practice-staff-area .music-staff__drawing{min-height:160px}.practice-staff-area svg{width:100%;height:160px}.answer-grid{--wheel-size:196px;--wheel-button:52px}.feedback-region{height:1.5rem}.practice-topbar{padding-block:0}.practice-footer .button{min-height:44px}}@media (max-height:480px) and (min-width:480px){.staff-caption{padding-top:8px}.staff-caption span:last-child{display:none}.staff-toolbar{padding:0 8px 4px 12px}.staff-toolbar>span{display:none}.practice-staff-area .music-staff__drawing{min-height:190px}.practice-staff-area svg{width:100%;height:190px}.answer-grid{--wheel-size:196px;--wheel-button:52px}.keyboard-hint{display:none}.feedback-region{height:1.5rem}}@media (prefers-reduced-motion:reduce){.round-progress>div{transition:none}.answer-grid .button:not(:disabled):active{transform:translate(-50%,-50%)}}.exercise-summary{justify-content:space-between;align-items:center;gap:8px;margin:8px 0 12px;display:flex}.exercise-summary strong{color:var(--color-primary);font-weight:650}@media (min-width:48rem){.app-shell__header{padding-block:16px}.app-shell__main{padding-top:12px}}.music-staff{color:var(--color-text)}.music-staff svg [fill]:not([fill=none]){fill:currentColor}.music-staff svg [stroke]:not([stroke=none]){stroke:currentColor}.quick-preferences{gap:4px;margin-inline-start:auto;display:flex}.preference-button{border:1px solid var(--color-border);background:var(--color-surface);width:44px;height:44px;color:var(--color-primary);cursor:pointer;touch-action:manipulation;border-radius:12px;place-items:center;font-size:.8rem;font-weight:700;display:grid}.preference-button:focus-visible{outline:3px solid var(--color-focus);outline-offset:3px}.header-settings{margin-inline-start:0;padding-inline:8px}.app-shell__header-inner{gap:8px}.preferences-section{margin-top:16px}[lang=fa]{font-family:Vazirmatn Variable,Tahoma,sans-serif}[lang=fa] .eyebrow,[lang=fa] .stat-label,[lang=fa] .staff-caption>span:first-child,[lang=fa] .setup-hero h1,[lang=fa] .settings-panel h2{letter-spacing:normal}[dir=rtl] .round-progress>div{transform-origin:100%}[dir=rtl] .hero-notes{transform:rotate(12deg)}@media (max-width:360px){.app-shell__header-inner{gap:4px}.app-shell__mark{width:32px;height:36px}.app-shell__brand{font-size:1rem}.header-settings{padding-inline:6px;font-size:.75rem}}.header-settings{flex:0 0 44px;padding:0}.settings-heading{flex-direction:column;align-items:flex-start;gap:20px;display:flex}.settings-heading h1{margin:0}.settings-back{align-items:center;gap:8px;text-decoration:none;display:inline-flex}[dir=rtl] .settings-back svg{transform:rotate(180deg)}