.note-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:6px;padding:4px 24px;max-width:380px;margin:0 auto;width:100%}.note-btn{aspect-ratio:1.15;font-family:var(--font-body);font-size:1.1rem;font-weight:600;border:2px solid var(--border);border-radius:12px;background:var(--bg-surface);color:var(--text-dim);cursor:pointer;transition:all .1s ease;-webkit-user-select:none;user-select:none;box-shadow:0 2px 4px #0003}.note-btn:active{transform:scale(.94);box-shadow:0 1px 2px #0003}.note-btn.selected{background:var(--accent);border-color:var(--accent);color:var(--bg-deep);font-weight:600;box-shadow:0 2px 12px #d4915c4d}.note-btn.chord-tone{background:#3a7a2e;border-color:#5cb848;color:#fff;font-weight:700;box-shadow:0 0 12px #5cb84840}.note-btn.correct{background:var(--correct-dim);border-color:#5a8a4a;color:#b0d8a0}.note-btn.extra{background:#8a2020;border-color:#d04040;color:#fff;font-weight:700;box-shadow:0 0 12px #d0404040}.note-btn.missed-chord-tone{background:transparent;border:2px dashed #5cb848;color:#5cb848;font-weight:700}.note-btn.missed{background:transparent;border:2px dashed #5a8a4a;color:#5a8a4a}.note-btn:disabled{cursor:default}.results{padding:0 20px;text-align:center;max-width:400px;margin:0 auto}.result-banner{font-family:var(--font-display);font-size:1.2rem;font-weight:400;padding:6px 16px;border-radius:8px;margin-bottom:8px}.result-banner.correct{background:#6a9a5b26;color:var(--correct);border:1px solid rgba(106,154,91,.3)}.result-banner.partial{background:#c49a4a1f;color:var(--partial);border:1px solid rgba(196,154,74,.25)}.result-banner.incorrect{background:#b04a4a1f;color:var(--incorrect);border:1px solid rgba(176,74,74,.25)}.result-chord{font-family:var(--font-display);font-size:1.8rem;font-weight:400;color:var(--text);margin:0 0 2px}.result-detail{margin-bottom:6px;color:var(--text-dim);font-size:.95rem}.result-detail p{margin:4px 0}.result-notes{display:grid;grid-template-columns:repeat(4,1fr);gap:5px;margin:10px auto;max-width:300px}.result-note{aspect-ratio:1.15;display:flex;align-items:center;justify-content:center;border-radius:10px;font-family:var(--font-body);font-size:.9rem;font-weight:600;border:2px solid var(--border);background:var(--bg-surface);color:var(--text-faint);box-shadow:0 2px 4px #0003}.result-note.chord-tone{background:#3a7a2e;border-color:#5cb848;color:#fff;font-weight:700;box-shadow:0 0 10px #5cb84840}.result-note.correct{background:var(--correct-dim);border-color:#5a8a4a;color:#b0d8a0}.result-note.extra{background:#8a2020;border-color:#d04040;color:#fff;font-weight:700;box-shadow:0 0 10px #d0404040}.result-note.missed-chord-tone{background:transparent;border:2px dashed #5cb848;color:#5cb848;font-weight:700}.result-note.missed{background:transparent;border:2px dashed #5a8a4a;color:#5a8a4a}.result-hint{color:var(--text-dim);font-size:.85rem;font-style:italic;margin:4px 0 8px;line-height:1.4}.alternatives{background:var(--bg-raised);border-radius:8px;padding:10px 14px;margin-bottom:8px;border:1px solid var(--border)}.alt-scale{text-decoration:underline dotted var(--text-faint);text-underline-offset:3px;cursor:pointer}.alt-scale.expanded{color:var(--accent);text-decoration-color:var(--accent-dim)}.alt-hint-wrapper{display:grid;grid-template-rows:0fr;transition:grid-template-rows .2s ease}.alt-hint-wrapper.open{grid-template-rows:1fr}.alt-hint-wrapper>.alt-hint{overflow:hidden;color:var(--text-dim);font-size:.8rem;font-style:italic;margin-top:0;line-height:1.4}.alt-hint-wrapper.open>.alt-hint{margin-top:6px}.alt-label{color:var(--text-faint);font-size:.75rem;margin-bottom:2px;text-transform:uppercase;letter-spacing:.06em;font-weight:500}.settings-overlay{position:fixed;inset:0;background:#0a0705d9;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);display:flex;align-items:center;justify-content:center;z-index:1000}.settings-panel{background:var(--bg-surface);border:1px solid var(--border);border-radius:16px;padding:24px;width:90%;max-width:400px;max-height:80vh;overflow-y:auto;color:var(--text);box-shadow:0 16px 64px #00000080}.settings-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px;padding-bottom:12px;border-bottom:1px solid var(--border)}.settings-header h2{margin:0;font-family:var(--font-display);font-size:1.4rem;font-weight:400}.close-btn{background:none;border:none;color:var(--text-dim);font-size:1.4rem;cursor:pointer;padding:4px 8px;line-height:1;transition:color .15s}.close-btn:active{color:var(--text)}.settings-section{margin-bottom:20px}.settings-section h3{font-family:var(--font-body);font-size:.75rem;font-weight:500;margin-bottom:10px;color:var(--text-faint);text-transform:uppercase;letter-spacing:.08em}.chord-toggle{display:flex;align-items:center;gap:10px;padding:7px 0;cursor:pointer;font-size:.95rem;color:var(--text-dim);transition:color .1s}.chord-toggle:active{color:var(--text)}.chord-toggle input[type=checkbox],.chord-toggle input[type=radio]{accent-color:var(--accent);width:16px;height:16px}input[type=range]{width:100%;accent-color:var(--accent);height:4px}.chord-info{padding-bottom:40px}.info-chord-name{font-family:var(--font-display);font-size:2.2rem;font-weight:400;color:var(--text);margin-bottom:4px}.info-notations{color:var(--text-dim);font-size:.95rem;margin-bottom:4px}.info-notations code{font-family:var(--font-body);background:var(--bg-raised);padding:2px 6px;border-radius:4px;font-size:.9rem}.info-section{border-top:1px solid var(--border);padding:16px 20px}.info-section:first-of-type{border-top:none}.info-heading{font-family:var(--font-display);font-size:1.15rem;font-weight:400;color:var(--text);margin-bottom:8px}.info-desc{color:var(--text-dim);font-size:.85rem;line-height:1.5;margin-bottom:10px}.info-formula{color:var(--accent);font-size:1rem;font-weight:600;margin-bottom:10px;letter-spacing:.02em}.info-notes{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:10px}.info-note{display:flex;align-items:center;justify-content:center;width:40px;height:40px;border-radius:8px;font-family:var(--font-body);font-size:.85rem;font-weight:600}.info-note.chord-tone{background:#3a7a2e;border:2px solid #5cb848;color:#fff}.info-note.scale-tone{background:var(--bg-raised);border:2px solid var(--border);color:var(--text-dim)}.info-section .play-btn{margin-top:4px}.info-alt{background:var(--bg-raised);border-radius:8px;padding:12px 14px;margin-bottom:8px;border:1px solid var(--border)}.info-alt-name{font-family:var(--font-display);font-size:1rem;font-weight:400;color:var(--text);margin-bottom:4px}.info-progressions{display:flex;flex-direction:column;gap:8px}.info-progression{display:flex;align-items:center;gap:10px;padding:10px 14px;background:var(--bg-raised);border-radius:8px;border:1px solid var(--border)}.prog-name{font-family:var(--font-body);font-size:1rem;font-weight:600;color:var(--text)}.prog-role{color:var(--text-dim);font-size:.85rem}.info-characteristic{display:flex;flex-direction:column;gap:10px}.char-item{padding:10px 14px;background:var(--bg-raised);border-radius:8px;border:1px solid var(--border)}.char-label{display:block;color:var(--text-faint);font-size:.75rem;text-transform:uppercase;letter-spacing:.06em;font-weight:500;margin-bottom:4px}.info-icon{display:inline-flex;align-items:center;justify-content:center;width:24px;height:24px;border-radius:50%;border:1.5px solid var(--text-faint);color:var(--text-faint);font-family:var(--font-display);font-size:.75rem;font-style:italic;text-decoration:none;margin-left:8px;transition:border-color .15s,color .15s;vertical-align:middle}.info-icon:active{border-color:var(--accent);color:var(--accent)}.info-link{display:inline-block;color:var(--accent-dim);font-size:.85rem;text-decoration:none;letter-spacing:.02em;padding:6px 0;transition:color .15s}.info-link:active{color:var(--accent)}.stats-screen{padding-top:16px;padding-bottom:40px}.stats-heading{font-family:var(--font-display);font-size:1.3rem;font-weight:400;margin-bottom:12px;color:var(--text)}.stats-section{margin-bottom:28px;padding-left:20px;padding-right:20px}.lifetime-stats{display:flex;justify-content:space-around}.lifetime-stat{display:flex;flex-direction:column;align-items:center;gap:4px}.lifetime-value{font-size:1.4rem;font-weight:700;color:var(--accent);font-variant-numeric:tabular-nums}.lifetime-label{font-size:.7rem;color:var(--text-dim);text-transform:uppercase;letter-spacing:.08em}.heatmap{overflow-x:auto;-webkit-overflow-scrolling:touch}.heatmap-header{display:grid;grid-template-columns:32px repeat(9,1fr);gap:2px;margin-bottom:2px}.heatmap-corner{width:32px}.heatmap-col-label{font-size:.55rem;color:var(--text-faint);text-align:center;white-space:nowrap;overflow:hidden}.heatmap-row{display:grid;grid-template-columns:32px repeat(9,1fr);gap:2px;margin-bottom:2px}.heatmap-row-label{font-size:.7rem;color:var(--text-dim);display:flex;align-items:center;justify-content:flex-end;padding-right:4px}.heatmap-cell{aspect-ratio:1;border:1px solid var(--border);border-radius:4px;cursor:pointer;transition:border-color .15s,transform .1s;min-width:0}.heatmap-cell:active{transform:scale(.9)}.heatmap-cell.selected{border-color:var(--accent);border-width:2px;box-shadow:0 0 8px var(--accent-glow)}.heatmap-detail{background:var(--bg-raised);border:1px solid var(--border);border-radius:12px;padding:16px;margin-top:12px;text-align:center}.heatmap-detail h3{font-family:var(--font-display);font-size:1.3rem;font-weight:400;margin-bottom:8px}.detail-overall{color:var(--text-dim);margin-bottom:8px}.detail-modes{display:flex;gap:12px;justify-content:center;margin-bottom:12px;flex-wrap:wrap}.detail-mode{font-size:.8rem;color:var(--text-dim);background:var(--bg-surface);padding:4px 8px;border-radius:4px}.detail-actions{display:flex;flex-direction:column;gap:8px;align-items:center}.detail-actions .play-btn{width:100%;text-decoration:none;text-align:center}.leaderboard-modes{display:flex;gap:6px;margin-bottom:12px}.leaderboard-mode-btn{flex:1;padding:6px;background:var(--bg-surface);border:1px solid var(--border);border-radius:6px;color:var(--text-dim);font-family:var(--font-body);font-size:.75rem;cursor:pointer;transition:border-color .15s,color .15s}.leaderboard-mode-btn.active{border-color:var(--accent);color:var(--accent)}.leaderboard-empty{color:var(--text-faint);font-size:.9rem;text-align:center;padding:20px}.leaderboard-entry{display:grid;grid-template-columns:28px 60px 1fr auto;gap:8px;align-items:center;padding:8px 4px;border-bottom:1px solid var(--border)}.lb-rank{font-weight:700;color:var(--accent);text-align:center}.lb-score{font-weight:700;font-variant-numeric:tabular-nums}.lb-details{font-size:.8rem;color:var(--text-dim)}.lb-date{font-size:.7rem;color:var(--text-faint)}:root{--bg-deep: #140f0b;--bg: #1c1612;--bg-surface: #2a2118;--bg-raised: #352b22;--accent: #d4915c;--accent-dim: #a06b3f;--accent-glow: rgba(212, 145, 92, .15);--text: #ede0d0;--text-dim: #9a8b7a;--text-faint: #6b5e50;--border: #3d3229;--correct: #6a9a5b;--correct-dim: #3d5a32;--incorrect: #b04a4a;--partial: #c49a4a;--heatmap-none: #2a2118;--heatmap-low: #8a3030;--heatmap-medium: #a07830;--heatmap-high: #4a8a3a;--font-display: "DM Serif Display", Georgia, serif;--font-body: "IBM Plex Sans", system-ui, sans-serif}*{box-sizing:border-box;margin:0;padding:0;-webkit-tap-highlight-color:transparent}html{overflow-y:scroll;scrollbar-gutter:stable;scrollbar-color:var(--border) var(--bg);scrollbar-width:thin}body{font-family:var(--font-body);background:var(--bg);color:var(--text);min-height:100dvh;overflow-x:hidden;-webkit-font-smoothing:antialiased}.app{max-width:500px;margin:0 auto;min-height:100dvh;display:flex;flex-direction:column}.start-screen{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;padding:32px}.start-screen h1{font-family:var(--font-display);font-size:2.6rem;font-weight:400;color:var(--text);letter-spacing:-.01em;text-align:center}.start-screen p{color:var(--text-dim);font-size:1rem;letter-spacing:.08em;text-transform:uppercase;font-weight:500}.start-btn{background:var(--accent);color:var(--bg-deep);border:none;border-radius:999px;padding:16px 44px;font-family:var(--font-body);font-size:1.05rem;font-weight:600;cursor:pointer;margin-top:32px;letter-spacing:.02em;transition:transform .15s,box-shadow .15s;box-shadow:0 4px 24px #d4915c40}.start-btn:active{transform:scale(.97);box-shadow:0 2px 12px #d4915c33}.difficulty-options{display:flex;flex-direction:column;gap:10px;width:100%;max-width:320px;margin-top:12px}.difficulty-btn{display:flex;flex-direction:column;gap:2px;padding:14px 18px;background:var(--bg-surface);border:2px solid var(--border);border-radius:12px;color:var(--text-dim);cursor:pointer;text-align:left;font-family:var(--font-body);transition:border-color .15s,color .15s}.difficulty-btn strong{font-size:1.05rem;color:var(--text)}.difficulty-btn span{font-size:.85rem}.difficulty-btn.active{border-color:var(--accent);background:var(--accent-glow)}.difficulty-btn.active strong{color:var(--accent)}.difficulty-btn:active{transform:scale(.98)}.mode-selection{display:flex;gap:10px;width:100%;max-width:320px;margin-top:20px}.mode-selection .start-btn{flex:1;padding:14px 16px;font-size:.95rem;margin-top:0}.top-bar{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;padding:0 20px;height:50px;border-bottom:1px solid var(--border)}.top-bar-left{justify-self:start}.top-bar-center{font-size:1rem;font-weight:600;color:var(--text)}.score{font-size:1rem;font-weight:600;display:flex;align-items:center;gap:10px;color:var(--text);font-variant-numeric:tabular-nums}.reset-btn{background:none;border:1px solid var(--border);color:var(--text-dim);border-radius:4px;padding:2px 8px;font-family:var(--font-body);font-size:.7rem;font-weight:500;cursor:pointer;letter-spacing:.05em;text-transform:uppercase;transition:color .15s,border-color .15s}.reset-btn:active{color:var(--text);border-color:var(--text-dim)}.nav-back{display:inline-block;background:none;border:none;color:var(--accent);font-family:var(--font-body);font-size:.9rem;cursor:pointer;padding:0;justify-self:start;line-height:1;text-decoration:none;transition:color .15s}.nav-back:active{color:var(--accent-dim)}.gear-btn{background:none;border:none;color:var(--text-dim);font-size:1.3rem;cursor:pointer;padding:4px;line-height:1;transition:color .15s}.gear-btn:active{color:var(--accent)}.chord-display{text-align:center;padding:16px 16px 10px}.chord-symbol{font-family:var(--font-display);font-size:2.8rem;font-weight:400;margin-bottom:8px;color:var(--text);letter-spacing:-.02em}.feedback-slot{flex:1;display:flex;align-items:flex-end;justify-content:center}.feedback-content{display:flex;flex-direction:column;align-items:center;gap:8px;padding-bottom:8px}.play-buttons{display:flex;gap:10px;justify-content:center}.play-btn{background:none;border:1px solid var(--accent-dim);color:var(--accent);border-radius:999px;padding:8px 24px;font-family:var(--font-body);font-size:.85rem;font-weight:500;cursor:pointer;letter-spacing:.03em;transition:background .15s,border-color .15s}.play-btn:active{background:var(--accent-glow);border-color:var(--accent)}.submit-area{padding:10px 20px 20px;text-align:center}.submit-btn{background:var(--accent);color:var(--bg-deep);border:none;border-radius:999px;padding:14px 56px;font-family:var(--font-body);font-size:1.05rem;font-weight:600;cursor:pointer;letter-spacing:.02em;transition:transform .12s,opacity .12s,box-shadow .15s;box-shadow:0 2px 16px #d4915c33}.submit-btn:disabled{opacity:.3;cursor:default;box-shadow:none}.submit-btn:active:not(:disabled){transform:scale(.97)}.result-overlay{position:fixed;inset:0;background:#0a0705b3;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);display:flex;align-items:flex-end;justify-content:center;z-index:1000}.result-sheet{background:var(--bg-surface);border:1px solid var(--border);border-radius:20px 20px 0 0;padding:24px 20px 28px;width:100%;max-width:500px;text-align:center;box-shadow:0 -8px 40px #0006}.result-sheet-actions{display:flex;gap:12px;justify-content:center;align-items:center;margin-top:16px}.result-sheet-actions .play-btn,.result-sheet-actions .submit-btn{flex:1;padding:12px 0;font-size:.95rem}.top-bar-right{display:flex;align-items:center;justify-self:end;gap:12px}.timer{font-size:1.1rem;font-weight:700;font-variant-numeric:tabular-nums;color:var(--text)}.timer-urgent{color:var(--incorrect);animation:timer-pulse 1s infinite}@keyframes timer-pulse{0%,to{opacity:1}50%{opacity:.5}}.timed-score{font-size:1.2rem;font-weight:700}.timed-multiplier{font-size:.85rem;color:var(--accent);font-weight:600}.note-grid-wrapper{transition:outline-color .15s;border-radius:16px}.flash-correct{animation:flash-green .8s ease-out}.flash-incorrect{animation:flash-red .8s ease-out}@keyframes flash-green{0%{outline:3px solid var(--correct);outline-offset:4px}to{outline:3px solid transparent;outline-offset:4px}}@keyframes flash-red{0%{outline:3px solid var(--incorrect);outline-offset:4px}to{outline:3px solid transparent;outline-offset:4px}}.timed-end-overlay{position:fixed;inset:0;background:#0a0705d9;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);display:flex;align-items:center;justify-content:center;z-index:1000}.timed-end-sheet{background:var(--bg-surface);border:1px solid var(--border);border-radius:20px;padding:32px 24px;width:90%;max-width:360px;text-align:center}.timed-end-title{font-family:var(--font-display);font-size:2rem;font-weight:400;margin-bottom:24px;color:var(--text)}.timed-end-stats{display:flex;justify-content:space-around;margin-bottom:24px}.timed-stat{display:flex;flex-direction:column;align-items:center;gap:4px}.timed-stat-value{font-size:1.6rem;font-weight:700;color:var(--accent);font-variant-numeric:tabular-nums}.timed-stat-label{font-size:.75rem;color:var(--text-dim);text-transform:uppercase;letter-spacing:.08em}.timed-end-save{display:flex;flex-direction:column;gap:10px;margin-bottom:20px}.name-input{background:var(--bg-raised);border:1px solid var(--border);border-radius:8px;padding:10px 14px;color:var(--text);font-family:var(--font-body);font-size:1rem;text-align:center}.name-input::placeholder{color:var(--text-faint)}.save-confirmation{color:var(--correct);margin-bottom:20px;font-weight:600}.timed-end-actions{display:flex;gap:10px;justify-content:center}.filter-banner{display:flex;align-items:center;justify-content:center;gap:10px;padding:6px 16px;background:var(--accent-glow);border-bottom:1px solid var(--border);font-size:.85rem;color:var(--accent)}