:root{color-scheme:light;--bg: #f3efe6;--ink: #1c1914;--muted: #6b6458;--faint: #9a9184;--accent: #1f5c45;--accent-soft: #dce8e1;--wrong: #b5472a;--wrong-soft: #f4d9d1;--right: #1f5c45;--right-soft: #d5eadc;--card: #fffcf7;--line: #ddd4c4;--shadow: 0 1px 0 rgba(28, 25, 20, .04);--space: 8px;--space-2: 16px;--space-3: 24px;--space-4: 32px;--space-5: 40px;--space-6: 56px;font-family:Iowan Old Style,Palatino Linotype,Palatino,Georgia,serif;font-size:17px;line-height:1.45;color:var(--ink);background:var(--bg)}*{box-sizing:border-box}html,body,#root{margin:0;min-height:100%}body{background:radial-gradient(1200px 500px at 10% -10%,#fff8ea 0%,transparent 50%),var(--bg)}button,input,select{font:inherit}select{appearance:none;border:1px solid var(--line);background-color:var(--card);color:var(--ink);border-radius:10px;padding:8px 32px 8px 12px;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='%236b6458' d='M1 1.2 6 6.2 11 1.2 9.8 0 6 3.8 2.2 0z'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 10px center}input[type=checkbox]{appearance:none;width:1.05em;height:1.05em;margin:0;flex-shrink:0;border:1px solid var(--line);border-radius:4px;background-color:var(--card);background-repeat:no-repeat;background-position:center;background-size:.72em;cursor:pointer}input[type=checkbox]:checked{background-color:var(--accent);border-color:var(--accent);background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 12'%3E%3Cpath fill='none' stroke='%23f7fff9' stroke-width='2' stroke-linecap='round' stroke-linejoin='round' d='M2.2 6.2 4.8 8.8 9.8 3.2'/%3E%3C/svg%3E")}input[type=checkbox]:disabled{opacity:.45;cursor:not-allowed}input[type=checkbox]:focus-visible{outline:2px solid var(--accent);outline-offset:2px}a{color:var(--accent)}.env-banner{position:sticky;top:0;z-index:40;display:flex;justify-content:center;align-items:center;gap:10px;flex-wrap:wrap;padding:7px 16px;background:#5c3d12;color:#ffe9c2;font-family:ui-sans-serif,system-ui,sans-serif;font-size:.78rem}.env-banner-kind{text-transform:uppercase;font-weight:700;letter-spacing:.12em;background:#e6b15a;color:#2a1a08;padding:2px 7px;border-radius:4px}.env-banner-detail{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.8rem;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:min(70vw,520px)}.app-shell{max-width:920px;margin:0 auto;padding:var(--space-5) var(--space-5) 96px}.topbar{display:flex;align-items:center;justify-content:space-between;gap:var(--space-2);padding-bottom:var(--space-4);border-bottom:1px solid var(--line);margin-bottom:var(--space-5);flex-wrap:nowrap}.topbar-main{display:flex;align-items:baseline;gap:14px;flex:1;min-width:0}.auth-menu{position:relative;display:flex;align-items:center;font-family:ui-sans-serif,system-ui,sans-serif;font-size:.85rem;flex-shrink:0}.auth-trigger-placeholder{display:block;width:4.6em;height:34px}.auth-trigger-avatar{appearance:none;width:32px;height:32px;padding:0;border:1px solid var(--line);border-radius:50%;background:var(--accent-soft);color:var(--accent);overflow:hidden;display:grid;place-items:center;cursor:pointer}.auth-trigger-avatar:hover{border-color:var(--muted)}.auth-avatar{width:100%;height:100%;object-fit:cover;display:block}.auth-initials{font-family:ui-sans-serif,system-ui,sans-serif;font-size:.68rem;font-weight:600;letter-spacing:.04em}.auth-panel{position:absolute;top:calc(100% + 8px);right:0;z-index:20;width:min(240px,calc(100vw - 40px));display:flex;flex-direction:column;gap:10px;padding:12px;background:var(--card);border:1px solid var(--line);border-radius:12px;box-shadow:var(--shadow)}.auth-panel .btn{width:100%}.auth-identity{min-width:0}.auth-name{color:var(--ink);overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-weight:600}.auth-email{color:var(--muted);font-size:.78rem;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.auth-blurb{margin:0;color:var(--muted);font-size:.82rem}.auth-error{margin:0;color:var(--wrong);font-size:.78rem}.auth-signin{padding:6px 12px;font-size:.85rem}.wordmark{font-size:1.35rem;letter-spacing:-.02em;text-decoration:none;color:var(--ink);flex-shrink:0;white-space:nowrap}.wordmark span{color:var(--muted);font-style:italic;font-weight:400}.nav{display:flex;gap:8px;flex-wrap:nowrap}.nav a{text-decoration:none;color:var(--muted);padding:6px 10px;border-radius:999px}.nav a.active{color:var(--ink);background:var(--card);box-shadow:inset 0 0 0 1px var(--line)}h1{font-size:1.7rem;font-weight:600;letter-spacing:-.03em;margin:0 0 8px}.lede{color:var(--muted);margin:0 0 var(--space-4);max-width:42em}.card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:var(--space-4) 24px;box-shadow:var(--shadow)}.stat-label{display:block;font-family:ui-sans-serif,system-ui,sans-serif;font-size:.72rem;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);margin-bottom:6px}.stat-value{font-size:1.6rem;letter-spacing:-.03em}.panel{display:grid;gap:16px}.row{display:flex;flex-wrap:wrap;gap:8px;align-items:center}fieldset.row{border:0;margin:0;padding:0;min-inline-size:0}.btn{appearance:none;border:1px solid var(--line);background:var(--card);color:var(--ink);border-radius:10px;padding:10px 14px;cursor:pointer}.btn:hover:not(:disabled){border-color:var(--muted)}.btn-primary{background:var(--accent);border-color:var(--accent);color:#f7fff9}.btn-primary:hover{filter:brightness(1.05)}.btn:disabled{opacity:.45;cursor:not-allowed}.btn-ghost{background:transparent}.answer-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(148px,1fr));gap:var(--space-2) var(--space-3)}.answer-btn{position:relative;text-align:left;min-height:56px;padding:12px 14px 12px 12px}.answer-btn kbd{position:absolute;top:8px;right:10px;font-family:ui-sans-serif,system-ui,sans-serif;font-size:.7rem;color:var(--faint);border:1px solid var(--line);border-radius:4px;padding:0 4px}.answer-btn.wrong{background:var(--wrong-soft);border-color:var(--wrong)}.answer-btn.right{background:var(--right-soft);border-color:var(--right)}.answer-btn:disabled:not(.locked){opacity:1;cursor:default}.answer-btn.locked,.answer-btn.locked:disabled{opacity:1;color:var(--muted);background:transparent;border-color:transparent;cursor:default}.answer-btn.locked:hover{border-color:transparent}.field{display:flex;flex-direction:column;gap:6px;font-family:ui-sans-serif,system-ui,sans-serif;font-size:.9rem}.field label,.option-label{font-family:ui-sans-serif,system-ui,sans-serif;font-size:.85rem;color:var(--muted)}.options{display:grid;gap:14px}.check-grid{display:flex;flex-wrap:wrap;gap:8px 14px}.check-grid label,.check{display:flex;gap:6px;align-items:center;font-family:ui-sans-serif,system-ui,sans-serif;font-size:.92rem}.drill-toolbar{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:var(--space-3) var(--space-4)}.play-row{position:relative;display:flex;align-items:center}.play-row .btn-primary{width:8em;min-width:8em;padding-left:22px;padding-right:22px}.play-status{position:absolute;left:calc(8em + 12px);top:50%;transform:translateY(-50%);white-space:nowrap;pointer-events:none}.settings-row{display:flex;flex-wrap:wrap;align-items:flex-end;gap:8px 10px;border:0;margin:0;padding:0;min-inline-size:0}.settings-row .field{font-size:.78rem;color:var(--muted);gap:4px}.settings-row select{padding:6px 28px 6px 10px;font-size:.88rem;border-radius:8px}.settings-row .check{padding-bottom:6px;color:var(--muted);font-size:.85rem}.score-board{display:flex;flex-direction:column;gap:8px;min-height:92px;justify-content:center}.feedback{font-size:1.05rem}.feedback.wrong{color:var(--wrong)}.feedback.right{color:var(--right)}.notation{overflow-x:auto;padding:8px 0 4px}.notation svg{display:block}.tap-pad{width:100%;min-height:140px;border-radius:14px;border:1px dashed var(--accent);background:var(--accent-soft);font-size:1.15rem;cursor:pointer;-webkit-user-select:none;user-select:none}.tap-pad:active,.tap-pad.down{background:#c9ddd3}.tap-pad:disabled{cursor:default;border-style:solid;background:var(--card)}.marks{display:flex;flex-wrap:wrap;gap:6px;margin-top:10px}.mark{width:14px;height:28px;border-radius:3px;background:var(--line);position:relative}.mark.hit{background:var(--accent)}.mark.miss{background:var(--wrong)}.mark.early:after,.mark.late:after{content:"";position:absolute;left:3px;right:3px;height:3px;background:#fffcf7}.mark.early:after{top:4px}.mark.late:after{bottom:4px}.muted{color:var(--muted)}.small{font-family:ui-sans-serif,system-ui,sans-serif;font-size:.85rem;color:var(--muted)}.stack-page{display:grid;gap:var(--space-6)}hr.sep{border:0;border-top:1px solid var(--line);margin:4px 0}input[type=range]{width:180px}.btn-selected{border-color:var(--accent);background:var(--accent-soft)}.answer-btn.focus-answer{box-shadow:inset 0 0 0 1px var(--accent)}.unlock-banner{font-family:ui-sans-serif,system-ui,sans-serif;font-size:.85rem;color:var(--accent)}.heatmap{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:var(--space)}.heatmap-chords{grid-template-columns:repeat(4,minmax(0,1fr))}.heat-cell{display:flex;flex-direction:column;align-items:center;gap:4px;border:1px solid var(--line);border-radius:8px;padding:10px 4px 8px;font-family:ui-sans-serif,system-ui,sans-serif;font-size:.88rem;line-height:1.2}.heat-cell.clickable{cursor:pointer}.heat-cell.pending{opacity:.55;background:var(--card)}.heat-cell.locked{opacity:.45;border-style:dashed;background:transparent!important}.heat-cell.focus{box-shadow:0 0 0 2px var(--accent)}.heat-meta{font-size:.68rem;color:var(--muted)}.heat-meta.pct{color:var(--accent)}@media(max-width:640px){.app-shell{padding:var(--space-3) var(--space-3) 72px}.topbar{gap:var(--space);padding-bottom:var(--space-2);margin-bottom:var(--space-3)}.topbar-main{gap:8px}.wordmark{font-size:1.15rem}.nav{gap:2px}.nav a{padding:5px 8px}.stack-page{gap:var(--space-4)}.card{padding:var(--space-3) 16px}.answer-grid{gap:12px}.heatmap{grid-template-columns:repeat(4,minmax(0,1fr))}.heatmap-chords{grid-template-columns:repeat(3,minmax(0,1fr))}}