:root{--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark;--background:#0d1118;--surface:#171d28;--surface-hover:#222b3a;--border:#354055;--text:#f5f7fb;--muted:#aab4c7;--blue:#61a4ff;--green:#5be69a;--red:#ff6f7f}.desktop-stats.stats-screen{width:min(1100px,100% - 40px);max-width:none;padding:42px 0 56px}.desktop-stats .stats-heading{margin-bottom:24px}.desktop-stats .stats-heading h1{font-size:clamp(2rem,3vw,2.6rem)}.desktop-stats .stats-heading p{font-size:1.1rem}.stats-controls{justify-items:center;gap:14px;margin:0 0 20px;display:grid}.stats-control-row,.stats-filter-pairs>div{align-items:center;gap:12px;display:flex}.stats-control-row>span,.stats-filter-pairs>div>span{color:#8792a6;letter-spacing:.08em;text-transform:uppercase;font-size:.76rem;font-weight:800}.segmented{border:1px solid var(--border);background:#171d28;display:flex}.segmented button{border:0;border-right:1px solid var(--border);min-width:106px;color:var(--muted);background:0 0;border-radius:0;padding:10px 17px;font-weight:800}.segmented button:last-child{border-right:0}.segmented button.selected{color:#dceaff;background:#29466f}.stats-filter-pairs{gap:28px;display:flex}.stats-filter-pairs .segmented button{min-width:92px}.history-tabs{gap:28px;display:flex}.history-tabs button{color:var(--muted);background:0 0;border:0;padding:4px 0;font-weight:800}.history-tabs button.selected{color:var(--blue)}.desktop-table-wrap{background:#171d28;max-height:min(67vh,760px)}.desktop-table th,.desktop-table td{padding:13px 22px;font-size:1rem}.desktop-table th{color:#d6dbe5;letter-spacing:0;text-transform:none;font-size:.94rem}.desktop-table td{background:#232a36;border-bottom:8px solid #171d28}.desktop-table td:first-child{color:#fff;font-family:Georgia,Times New Roman,serif;font-size:1.28rem}.desktop-table .table-group td{color:#71b0ff;background:#171d28;border:0;padding:15px 22px 8px;font-family:Arial,Helvetica,sans-serif;font-size:1rem;font-weight:800}.desktop-table .trend{font-family:Arial,Helvetica,sans-serif;font-size:1.45rem;font-weight:700}.desktop-table .trend.up{color:#35d89a}.desktop-table .trend.down{color:#ff717d}.desktop-table .trend.flat{color:#d0d6df}.progress-dashboard{border:1px solid var(--border);background:#171d28;grid-template-columns:minmax(0,1.55fr) minmax(320px,.8fr);gap:48px;padding:42px 56px 36px;display:grid}.progress-dashboard h2{letter-spacing:-.035em;margin:0 0 9px;font-size:1.6rem}.progress-dashboard p{color:#98a3b8;margin:0;font-size:1.05rem}.mastery-summary{align-items:center;gap:56px;min-height:80px;display:flex}.mastery-summary strong{color:var(--blue);letter-spacing:-.06em;font-size:2.6rem}.mastery-summary span{color:#b9c2d1;font-size:1.05rem;font-weight:750}.progress-svg,.tempo-svg{width:100%;overflow:visible}.progress-svg{margin-top:4px}.progress-svg line,.tempo-svg line{stroke:#344052;stroke-width:1px}.progress-svg polyline{fill:none;stroke:#5b9ef8;stroke-width:4px;stroke-linejoin:round;stroke-linecap:round}.progress-svg circle,.tempo-svg circle{fill:#5b9ef8}.progress-svg text,.tempo-svg text{fill:#98a3b8;font-family:Arial,Helvetica,sans-serif;font-size:12px}.progress-svg .point-label,.tempo-svg .point-label{fill:#d5dbe5;text-anchor:middle;font-weight:750}.progress-svg .date-label,.tempo-svg .date-label{text-anchor:middle;font-size:11px}.secondary-chart{min-width:0}.activity-heatmap{gap:11px;max-width:100%;margin-top:42px;display:flex;overflow:hidden}.weekday-labels{color:#98a3b8;flex:0 0 28px;grid-template-rows:repeat(7,minmax(0,1fr));gap:7px;font-weight:700;display:grid}.weekday-labels span{place-items:center;display:grid}.heatmap-grid{aspect-ratio:8/7;flex:auto;grid-template-rows:repeat(7,minmax(0,1fr));grid-template-columns:repeat(8,minmax(0,1fr));grid-auto-flow:column;gap:7px;width:100%;min-width:0;display:grid}.heat-cell{background:#252d3a;min-width:0;min-height:0;display:block}.heat-cell.light{background:#386ebc}.heat-cell.medium{background:#367cf1}.heat-cell.busy{background:#2460d8}@media (width<=760px){.desktop-stats.stats-screen{width:min(100% - 26px,1100px);padding-top:28px}.stats-filter-pairs{flex-wrap:wrap;justify-content:center;gap:11px}.progress-dashboard{grid-template-columns:1fr;gap:30px;padding:28px 20px}.mastery-summary{flex-wrap:wrap;gap:20px}.heatmap-grid{grid-template-rows:repeat(7,28px);grid-template-columns:repeat(8,28px)}.weekday-labels{grid-template-rows:repeat(7,28px)}.desktop-table th,.desktop-table td{padding:12px 11px}.desktop-table th:first-child,.desktop-table td:first-child{padding-left:14px}.history-tabs{gap:15px}.history-tabs button{font-size:.85rem}}.desktop-practice-layout .main-chord{top:35%!important}.desktop-practice-layout .next-chord{top:60%!important}.desktop-practice-layout .practice-feedback{min-height:0!important;font-family:Arial,Helvetica,sans-serif!important;font-size:clamp(4rem,6vw,6rem)!important;font-weight:500!important;line-height:1!important;top:7%!important}.desktop-practice-layout .played-notes{letter-spacing:.055em!important;min-height:0!important;font-family:Arial,Helvetica,sans-serif!important;font-size:clamp(2.25rem,4vw,4.5rem)!important;font-weight:800!important;top:80%!important}.desktop-practice-layout .practice-hint{font-size:clamp(1rem,1.35vw,1.45rem)!important;top:94%!important}.chord-modifiers.stacked{bottom:.03em!important}.chord-modifiers.stacked .bracket{transform:none!important}.next-chord .engraved-chord{opacity:1;color:#fff!important}.desktop-practice-layout{--chord-size:clamp(4.4rem, 7.2vw, 6.2rem)!important}.root-accidental.flat{font-size:.66em;bottom:.29em}.root-accidental.sharp{margin-right:.025em;font-size:.77em}.root-accidental.sharp+.chord-extension{margin-left:.06em}.chord-extension,.chord-modifiers.single{font-size:.55em;bottom:.49em}.stacked .modifier-tones{font-size:.43em}.sharp-alteration{margin-right:.028em;display:inline-block}.scale-glyph{color:#fff;letter-spacing:-.035em;white-space:nowrap;align-items:baseline;gap:.22em;font-family:Arial,Helvetica,sans-serif;font-size:clamp(3.3rem,5.6vw,5rem);font-weight:800;line-height:1;display:inline-flex}.scale-root{letter-spacing:-.055em}.scale-root-accidental{margin-left:.015em;margin-right:.04em;font-size:.82em;display:inline-block;position:relative;bottom:.03em}.scale-type{font:inherit;letter-spacing:inherit}.next-chord.scales{gap:.18em}.next-chord.scales>span,.next-chord.scales .scale-glyph{color:#aeb7c4;letter-spacing:-.025em;font-family:Arial,Helvetica,sans-serif;font-size:clamp(1.8rem,3.25vw,3rem);font-weight:400}.management-details>.scale-glyph{margin-bottom:38px;font-size:clamp(2.4rem,4.2vw,3.8rem)}.editor-details .classical-option{align-items:center;gap:9px;display:flex}.editor-details .classical-option input{width:auto}.gear-menu{z-index:4;background:#252b35;border:1px solid #58647a;border-radius:7px;min-width:118px;position:absolute;top:236px;right:max(5vw,36px);overflow:hidden;box-shadow:0 12px 30px #00000061}.scale-gear-menu{top:338px}.gear-menu button{color:#f3f4f6;text-align:left;background:0 0;border:0;width:100%;padding:11px 16px;font-weight:650;display:block}.gear-menu button:hover{background:#303947}.management-view{background:var(--background);min-height:100vh}.management-topbar{background:#1b1f27;align-items:center;gap:28px;height:62px;padding:0 30px;display:flex}.management-topbar h1{margin:0;font-size:1.35rem}.management-content{grid-template-columns:minmax(260px,300px) minmax(0,1fr);gap:22px;min-height:calc(100vh - 62px);padding:24px 28px;display:grid}.management-list,.management-details{border:1px solid var(--border);background:#1b1f27}.management-list{flex-direction:column;min-height:0;display:flex}.management-list h2{color:#d1d5db;margin:0;padding:16px 18px;font-size:.98rem}.scroll-list{max-height:calc(100vh - 148px);padding:0 8px 12px;overflow:auto}.scroll-list button{color:#f3f4f6;text-align:left;background:0 0;border:0;width:100%;padding:8px 10px;font-family:Times New Roman,Times,serif;font-size:1.2rem;display:block}.scroll-list button:hover,.scroll-list button.selected{background:#303f57}.section-kicker{color:#9ca3af;margin:0 0 24px;font-weight:700}.management-details>.engraved-chord{margin-bottom:38px}.tone-group{margin:0 0 30px}.tone-group h2{margin:0 0 8px;font-size:1rem}.tone-group p{margin:0 0 4px;font-size:1.3rem}.tone-group small{color:#9ca3af}.tone-group.required h2,.tone-group.required p{color:#d1fae5}.tone-group.optional h2,.tone-group.optional p{color:#cbd5e1}.list-actions{justify-content:space-between;padding:0 18px 12px;display:flex}.list-actions button,.add-quality{color:#93c5fd;background:0 0;border:0;padding:0;font-weight:750}.add-quality{color:#86efac;margin:12px 18px 16px auto}.editable-rule{align-items:center;gap:10px;min-height:42px;display:flex}.editable-rule.selected{background:#303f57}.editable-rule .quality-name{flex:1;font-family:Times New Roman,Times,serif}.editable-rule input{accent-color:#60a5fa;width:18px;height:18px;margin-right:10px}.category-group{margin:2px 0}.category-toggle{color:#d1d5db;text-align:left;background:0 0;border:0;align-items:center;gap:8px;width:100%;padding:9px 10px;font-weight:750;display:flex}.category-toggle:hover{background:#252b35}.category-toggle span{color:#aeb7c4;width:12px;font-size:1.2rem;line-height:.7}.category-toggle small{color:#6b7280;margin-left:auto;font-weight:650}.editor-details{max-width:760px}.editor-details label{color:#d1d5db;gap:8px;margin:0 0 22px;font-weight:700;display:grid}.editor-details input,.editor-details select{color:#f3f4f6;background:#252b35;border:1px solid #46505e;border-radius:3px;outline:none;width:100%;padding:10px 12px;font:1.15rem Times New Roman,Times,serif}.editor-details input:focus,.editor-details select:focus{border-color:#60a5fa}.field-help{color:#9ca3af;margin:-8px 0 16px}.editor-error{color:#f87171}.save-rule{color:#fff;background:#2563eb;border:0;border-radius:4px;padding:11px 18px;font-weight:750}.management-topbar{gap:22px;height:56px;padding:0 24px}.management-topbar h1{font-size:1.2rem}.management-content{grid-template-columns:260px minmax(0,1fr);gap:16px;min-height:calc(100vh - 56px);padding:18px 22px}.management-list h2{padding:13px 15px;font-size:1rem}.scroll-list{max-height:calc(100vh - 128px);padding:0 6px 8px}.scroll-list button,.quality-name{font-weight:700;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif!important;font-size:.92rem!important}.scroll-list button{padding:6px 9px}.category-toggle{padding:7px 9px;font-size:.92rem}.category-toggle span{font-size:1rem}.category-group .editable-rule{padding-left:18px}.editable-rule{min-height:34px}.editable-rule input{width:16px;height:16px}.list-actions{padding:0 15px 9px;font-size:.88rem}.add-quality{margin:9px 15px 12px auto;font-size:.88rem}.management-details{padding:28px 32px}.section-kicker{color:#d1d5db;letter-spacing:-.025em;margin:0 0 20px;font-size:1.35rem;font-weight:800}.editor-details label{letter-spacing:-.015em;gap:7px;margin:0 0 17px;font-size:1.05rem;font-weight:800}.editor-details input,.editor-details select{padding:8px 10px;font-size:1rem}.field-help{margin:-5px 0 13px;font-size:.88rem}*{box-sizing:border-box}body{background:radial-gradient(circle at 50% -15%,#1b2433 0,var(--background) 48%);min-width:320px;min-height:100vh;color:var(--text);margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}button,input{font:inherit}button{cursor:pointer}.app-shell{min-height:100vh}.topbar{border-bottom:1px solid var(--border);height:58px;color:var(--muted);background:#1b1f27;justify-content:space-between;align-items:center;padding:0 clamp(22px,5vw,72px);font-size:.88rem;display:flex}.main-nav{align-self:stretch;align-items:stretch;gap:8px;display:flex}.nav-tab{color:var(--muted);background:0 0;border:0;padding:0 24px;font-size:1rem;font-weight:750}.nav-tab:first-child{margin-left:24px}.nav-tab.active{color:var(--text)}.nav-tab:not(:disabled):hover{color:var(--blue)}.nav-tab:disabled{cursor:default}.prototype-label{color:#6b7280}.screen{width:min(1000px,100% - 40px);margin:0 auto}.home-screen{padding:32px 0 42px}.intro{text-align:center;margin-bottom:24px}.intro h1{letter-spacing:-.055em;margin:0 0 8px;font-size:2.2rem;line-height:1}.intro p,.home-note{color:var(--muted);margin:0;font-size:1rem}.account-status{color:#98a3b8;align-items:center;gap:12px;font-size:.85rem;display:flex}.account-status button{color:#93c5fd;background:0 0;border:0;padding:0;font-weight:750}.account-status .username-button{color:#dbeafe}.account-screen{place-items:center;min-height:calc(100vh - 58px);padding:30px 18px;display:grid}.account-card{border:1px solid var(--border);background:#171d28;width:min(430px,100%);padding:32px;box-shadow:0 22px 70px #00000047}.account-card h1{letter-spacing:-.05em;margin:12px 0 8px;font-size:2rem}.account-card>p{color:var(--muted);margin:0 0 24px;line-height:1.5}.account-back,.auth-switch{color:#93c5fd;background:0 0;border:0;padding:0;font-weight:750}.account-card form{gap:16px;display:grid}.account-card label{color:#dbe1eb;gap:7px;font-weight:750;display:grid}.account-card input{color:#f3f4f6;background:#252b35;border:1px solid #46505e;border-radius:4px;outline:none;padding:11px 12px}.account-card input:focus{border-color:#60a5fa}.auth-submit{color:#fff;background:#2563eb;border:0;border-radius:4px;padding:12px 16px;font-weight:800}.auth-submit:disabled{opacity:.65}.auth-switch{margin-top:20px}.auth-message{color:#aeb7c4;margin:0;line-height:1.45}.account-card .auth-message{margin:0}.stats-screen{padding:46px 0 64px}.stats-heading{text-align:center;margin:0 0 28px}.stats-heading h1{letter-spacing:-.05em;margin:0 0 8px;font-size:2.1rem}.stats-heading p{color:var(--muted);margin:0}.stats-summary{grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;margin:0 0 20px;display:grid}.stats-summary article{border:1px solid var(--border);background:#1b1f27;gap:5px;padding:22px 24px;display:grid}.stats-summary span{color:var(--muted);text-transform:uppercase;letter-spacing:.08em;font-size:.85rem;font-weight:750}.stats-summary strong{color:var(--blue);font-size:2rem;line-height:1}.stats-summary small{color:#aeb7c4}.stats-table-wrap{border:1px solid var(--border);background:#1b1f27;overflow:auto}.stats-table{border-collapse:collapse;text-align:left;width:100%}.stats-table th,.stats-table td{border-bottom:1px solid #303744;padding:14px 18px}.stats-table th{color:#d1d5db;text-transform:uppercase;letter-spacing:.06em;font-size:.85rem}.stats-table td{color:#f3f4f6}.stats-table td:nth-child(n+3),.stats-table th:nth-child(n+3){text-align:right}.stats-table tbody tr:last-child td{border-bottom:0}.stats-table tbody tr:hover{background:#252b35}.practice-panel{border:1px solid var(--border);background:#1b1f27;padding:18px 28px}.panel-heading{border-bottom:1px solid var(--border);color:#d1d5db;justify-content:space-between;align-items:baseline;margin-bottom:12px;padding:0 6px 14px;display:flex}.panel-heading h2{color:var(--text);margin:0;font-size:1.25rem}.practice-card{width:100%;color:var(--text);text-align:left;background:#252b35;border:0;justify-content:space-between;align-items:center;margin-top:8px;padding:18px 22px;transition:background .15s,transform .15s;display:flex}.practice-card.clickable{cursor:pointer}.practice-card.clickable:hover,.practice-card.clickable:focus-visible{background:#303947;outline:0;transform:translateY(-1px)}.practice-card.disabled{cursor:not-allowed;opacity:.62}.practice-card-copy{gap:4px;display:grid}.practice-card strong{letter-spacing:-.035em;font-size:1.55rem}.practice-card small{color:#aeb7c4;font-size:.95rem}.practice-card-actions{align-items:center;gap:18px;display:flex}.practice-card-meta{color:var(--blue);font-size:1rem;font-weight:700}.gear{color:#aeb7c4;background:0 0;border:0;padding:0;font-size:1.65rem;line-height:1}.gear:hover{color:var(--blue)}.unavailable{opacity:.55}.muted{color:var(--muted)}.quality-editor{z-index:5;background:#171d28;border:1px solid #58647a;width:min(560px,100% - 32px);max-height:min(700px,100vh - 44px);padding:26px;position:fixed;top:50%;left:50%;overflow:auto;transform:translate(-50%,-50%);box-shadow:0 22px 70px #0000008c}.editor-header{border-bottom:1px solid var(--border);justify-content:space-between;gap:18px;padding-bottom:16px;display:flex}.editor-header h2{margin:0 0 6px;font-size:1.45rem}.editor-header p{color:var(--muted);margin:0}.close-button{color:var(--muted);background:0 0;border:0;font-size:2rem;line-height:.8}.close-button:hover{color:var(--text)}.editor-actions{justify-content:space-between;margin:16px 0;display:flex}.editor-actions button{color:var(--blue);background:0 0;border:0;padding:0;font-weight:750}.quality-list{display:grid}.quality-option{cursor:pointer;justify-content:space-between;align-items:center;padding:14px 12px;font-family:Georgia,Times New Roman,serif;font-size:1.45rem;display:flex}.quality-option:hover{background:#252b35}.quality-option input{width:19px;height:19px;accent-color:var(--blue)}.tempo-control{text-align:center;max-width:330px;margin:30px auto 0}.tempo-control>p{color:var(--muted);margin:0 0 13px;font-size:.95rem}.tempo-picker{justify-content:center;align-items:center;gap:20px;display:flex}.tempo-step{color:var(--text);background:0 0;border:0;padding:6px 12px;font-size:2.2rem;line-height:1}.tempo-step:hover{color:var(--blue)}.tempo-value{justify-items:center;min-width:115px;display:grid}.tempo-number,.tempo-input{width:100%;color:var(--text);text-align:center;letter-spacing:-.06em;background:0 0;border:0;outline:0;padding:0;font-size:2.65rem;font-weight:720;line-height:1}.tempo-number{cursor:ns-resize;touch-action:none}.tempo-number.dragging{color:var(--blue)}.tempo-input{border-bottom:1px solid var(--blue);caret-color:var(--blue)}.tempo-value span{color:var(--muted);letter-spacing:.07em;font-size:.85rem;font-weight:700}.home-note{text-align:center;max-width:620px;margin:38px auto 0;font-size:.94rem;line-height:1.55}.practice-screen{flex-direction:column;width:100%;min-height:100vh;padding:38px 48px 30px;display:flex}.practice-topline{color:#8b95a5;justify-content:space-between;align-items:center;font-size:1rem;display:flex}.practice-left{align-items:center;gap:80px;display:flex}.text-button{color:#aeb7c4;background:0 0;border:0;padding:0;font-size:1.15rem;font-weight:800}.text-button:hover{color:#f9fafb}.accuracy-label{color:#f9fafb;font-size:1.28rem}.practice-status{color:#aeb7c4;font-size:1rem;font-weight:600}.desktop-practice-layout{--chord-size:clamp(5rem,9vw,7rem);flex:1;min-height:550px;position:relative;overflow:hidden}.practice-feedback{text-align:center;width:100%;min-height:56px;font-size:clamp(1.75rem,4vw,3.1rem);font-weight:800;position:absolute;top:8%}.practice-feedback.correct,.played-notes.correct{color:var(--green)}.practice-feedback.incorrect,.played-notes.incorrect{color:var(--red)}.main-chord{white-space:nowrap;position:absolute;top:40%;left:50%;transform:translate(-50%,-50%)}.count-in-number{color:#f9fafb;font-size:clamp(4.5rem,9vw,6.7rem);font-weight:800;line-height:1}.engraved-chord{color:#fff;font-family:Times New Roman,Times,serif;font-size:var(--chord-size);letter-spacing:-.045em;white-space:nowrap;line-height:.9;display:inline-block}.chord-root{letter-spacing:-.075em}.root-accidental{font-family:Times New Roman,Times,serif;line-height:1;display:inline-block;position:relative}.root-accidental.flat{margin-left:-.08em;margin-right:-.03em;font-size:.7em;bottom:.27em}.root-accidental.sharp{margin-left:-.025em;margin-right:-.01em;font-size:.82em;bottom:0}.quality-prefix{margin-left:.025em;font-size:.78em;display:inline-block}.chord-extension{letter-spacing:-.045em;margin-left:.04em;font-size:.58em;line-height:1;display:inline-block;position:relative;bottom:.45em}.root-accidental.flat+.chord-extension{margin-left:-.08em}.chord-modifiers{vertical-align:baseline;color:#fff;align-items:center;margin-left:.015em;display:inline-flex;position:relative}.chord-modifiers.single{font-size:.58em;line-height:1;bottom:.45em}.chord-modifiers.single .modifier-tones{display:inline-block}.chord-modifiers.single .bracket{font-size:1em;line-height:1}.chord-modifiers.single .flat-leading{display:inline-block;transform:translate(-.14em)}.chord-modifiers.stacked{line-height:1;bottom:.49em}.chord-modifiers.stacked .bracket{font-size:.9em;font-weight:300;line-height:.8;display:inline-block;transform:scaleY(.78)}.modifier-tones{text-align:center;flex-direction:column;justify-content:center;align-items:center;min-width:1.45em;display:flex}.stacked .modifier-tones{gap:.12em;font-size:.45em;line-height:1.05}.stacked .flat-leading{transform:translate(-.18em)}.engraved-chord.small{font-size:var(--chord-size)}.next-chord{white-space:nowrap;align-items:baseline;gap:12px;display:flex;position:absolute;top:59%;left:50%;transform:translate(-50%)}.next-chord>span{color:#aeb7c4;font-family:Times New Roman,Times,serif;font-size:calc(var(--chord-size) * .78);font-weight:400}.played-notes{color:#f9fafb;text-align:center;letter-spacing:.05em;width:90%;min-height:35px;font-family:Georgia,serif;font-size:1.45rem;position:absolute;top:77%;left:50%;transform:translate(-50%)}.practice-hint{text-align:center;color:#8b95a5;width:100%;font-size:1rem;position:absolute;top:90%}.practice-footer{border-top:1px solid var(--border);padding-top:15px}@media (width<=620px){.practice-card{padding:21px 18px}.practice-card strong{font-size:1.35rem}.practice-card-meta{font-size:.9rem}.practice-card small{font-size:.87rem}.practice-card-actions{gap:10px}.gear{font-size:1.4rem}.practice-footer{flex-direction:column;align-items:flex-start}.desktop-practice-layout{--chord-size:clamp(3.7rem,15vw,5.2rem);min-height:500px}.main-chord{top:35%}.next-chord{top:57%}}