@view-transition{navigation:auto}::view-transition-old(main-content){animation:.2s ease-out both fade-out}::view-transition-new(main-content){animation:.3s ease-in both fade-in}@keyframes fade-out{0%{opacity:1}to{opacity:0}}@keyframes fade-in{0%{opacity:0}to{opacity:1}}:root{color-scheme:light;--primary: #3B9AB2;--primary-hover: #2d7a8f;--primary-light: #78B7C5;--accent-warm: #FFC857;--accent-gold: #E1BD6D;--success: #0B775E;--error: #C93312;--warning: #DD8D29;--bg: #FAF5EC;--paper: rgba(255, 255, 255, .92);--ink: #313131;--muted: #899DA4;--accent: #3B9AB2;--accent-deep: #2d7a8f;--accent-soft: rgba(59, 154, 178, .12);--line: rgba(49, 49, 49, .1);--ok: #0B775E;--warn: #DD8D29;--text-secondary: #4A4A4A;--accent-3: rgba(59, 154, 178, .03);--accent-5: rgba(59, 154, 178, .05);--accent-6: rgba(59, 154, 178, .06);--accent-8: rgba(59, 154, 178, .08);--accent-10: rgba(59, 154, 178, .1);--accent-12: rgba(59, 154, 178, .12);--accent-15: rgba(59, 154, 178, .15);--accent-20: rgba(59, 154, 178, .2);--accent-25: rgba(59, 154, 178, .25);--accent-30: rgba(59, 154, 178, .3);--accent-35: rgba(59, 154, 178, .35);--accent-40: rgba(59, 154, 178, .4);--gold-6: rgba(255, 200, 87, .06);--gold-8: rgba(255, 200, 87, .08);--gold-10: rgba(255, 200, 87, .1);--gold-12: rgba(255, 200, 87, .12);--gold-15: rgba(255, 200, 87, .15);--gold-18: rgba(255, 200, 87, .18);--gold-20: rgba(255, 200, 87, .2);--gold-25: rgba(255, 200, 87, .25);--ink-3: rgba(49, 49, 49, .03);--ink-4: rgba(49, 49, 49, .04);--ink-5: rgba(49, 49, 49, .05);--ink-6: rgba(49, 49, 49, .06);--ink-10: rgba(49, 49, 49, .1);--ink-15: rgba(49, 49, 49, .15);--white-4: rgba(255, 255, 255, .04);--white-6: rgba(255, 255, 255, .06);--white-8: rgba(255, 255, 255, .08);--white-45: rgba(255, 255, 255, .45);--white-50: rgba(255, 255, 255, .5);--white-56: rgba(255, 255, 255, .56);--white-60: rgba(255, 255, 255, .6);--white-80: rgba(255, 255, 255, .8);--surface: #F5CDB4;--border-warm: #D9B382;--star-3: #FFC857;--star-2: #E1BD6D;--star-1: 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.12);--transition-fast: .15s ease;--transition-base: .2s ease;--transition-slow: .4s cubic-bezier(.16, 1, .3, 1);line-height:1.5;font-weight:400;color:var(--ink);background:radial-gradient(circle at top left,var(--accent-5),transparent 32%),radial-gradient(circle at bottom right,rgba(241,187,123,.06),transparent 28%),linear-gradient(180deg,#faf5ec,#f5ede0)}.shelf-cell,.shelf-cell-wide,.song-card,.exercise-table-row,.course-meta-line,.breadcrumbs,.top-nav{line-height:1.3}*{box-sizing:border-box;scrollbar-width:thin;scrollbar-color:rgba(49,49,49,.15) transparent}*::-webkit-scrollbar{width:6px;height:6px}*::-webkit-scrollbar-track{background:transparent}*::-webkit-scrollbar-thumb{background:#31313126;border-radius:3px}*::-webkit-scrollbar-thumb:hover{background:#31313147}html{scroll-behavior:smooth}body{margin:0;min-width:320px;min-height:100vh}a{color:inherit;text-decoration:none}p,ul,ol,h1,h2,h3,h4{margin-top:0}p{margin-bottom:0}:focus-visible{outline:2px solid 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14px;border-radius:var(--radius-pill);font-weight:700;font-size:var(--text-md)}.status.ok{background:#0b775e1f;color:var(--ok)}.status.warn{background:#dd8d2924;color:var(--warn)}.lead,.support-copy,.course-nav-meta,.preview-list span,.meta-row,.detail-label,.muted-note,.breadcrumbs,.outline-copy span,.section-head p{color:var(--muted)}.browser-layout{display:grid;grid-template-columns:280px minmax(0,1fr);gap:var(--space-md);align-items:start}.browser-sidebar{display:grid;gap:var(--space-md)}.browser-sidebar>.panel{box-shadow:none;-webkit-backdrop-filter:none;backdrop-filter:none;border:none;border-right:1px solid var(--line);border-radius:0;background:#faf5eb66;padding-left:0}.browser-sidebar .eyebrow{font-size:var(--text-xs);letter-spacing:.12em}.browser-sidebar .section-head 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strong{display:block;margin-bottom:2px}.btn-base,.action-link,.action-button,.secondary-button,.celebration-btn,.start-perform-btn{display:inline-flex;align-items:center;justify-content:center;min-height:42px;padding:10px 20px;border:1px solid transparent;border-radius:8px;font-weight:600;font-size:var(--text-md);letter-spacing:.01em;cursor:pointer;font-family:inherit;text-decoration:none;transition:transform var(--transition-base),background var(--transition-base),border-color var(--transition-base),box-shadow var(--transition-base)}.action-link.primary,.action-button,.celebration-btn.primary,.start-perform-btn{background:var(--accent);color:#faefd1;font-weight:700;box-shadow:0 4px 14px var(--accent-30)}.action-link.primary:hover,.action-button:hover:not(:disabled),.celebration-btn.primary:hover,.start-perform-btn:hover{background:var(--accent-deep);box-shadow:0 6px 20px var(--accent-40);transform:translateY(-2px)}.action-link.secondary,.secondary-button,.celebration-btn.secondary{background:var(--white-60);border:1.5px solid var(--line);border-radius:6px;color:var(--ink)}.action-link.secondary:hover,.secondary-button:hover:not(:disabled),.celebration-btn.secondary:hover{border-color:var(--accent);color:var(--accent);transform:translateY(-1px)}.btn-ghost{background:transparent;color:var(--text-secondary);padding:8px 16px;border-radius:6px}.btn-ghost:hover{background:var(--accent-5)}.action-link.danger{border-color:var(--error);color:var(--error);background:#c9331214}.action-link.danger:hover{background:#c9331226}.action-button:disabled,.secondary-button:disabled,.start-perform-btn:disabled{cursor:not-allowed;opacity:.55}.hero-copy .action-link.primary{padding:16px 36px;font-size:1.05rem;border-radius:var(--radius-lg);background:linear-gradient(135deg,var(--accent) 0%,#2d8fa0 50%,var(--accent-deep) 100%);background-size:200% 200%;animation:gradient-shift 4s ease infinite;box-shadow:0 4px 20px #3b9ab259;letter-spacing:.02em}@keyframes gradient-shift{0%,to{background-position:0% 50%}50%{background-position:100% 50%}}.hero-copy .action-link.primary:hover{box-shadow:0 6px 28px #3b9ab259,0 0 0 4px #ffc8571f;transform:translateY(-3px)}.hero-cta{display:inline-flex}.hero-resume-hint{font-size:var(--text-sm);color:var(--muted);margin-top:var(--space-sm)}.hero-steps{display:flex;gap:var(--space-xl);padding:var(--space-xl) 0 0;margin-top:var(--space-lg);border-top:1px solid var(--line)}.hero-step{flex:1;display:flex;flex-direction:column;gap:var(--space-xs);color:var(--muted)}.hero-step svg{color:var(--accent)}.hero-step h3{font-family:var(--font-display);font-size:var(--text-lg);font-weight:700;margin:0;color:var(--ink)}.hero-step p{font-size:var(--text-base);margin:0;line-height:1.4}@media(max-width:860px){.hero-steps{flex-direction:column;gap:var(--space-md)}}.action-row.compact{justify-content:flex-end}.detail-panel,.empty-panel{display:grid;gap:var(--space-md)}.detail-grid{grid-template-columns:repeat(auto-fit,minmax(140px,1fr))}.detail-stat strong{display:block;font-size:1rem}.course-meta-line{display:flex;align-items:center;gap:12px;font-size:var(--text-md);color:var(--muted)}.course-meta-line strong{font-family:var(--font-display);font-size:var(--text-lg);color:var(--accent);margin-right:2px}.course-meta-dot{width:4px;height:4px;border-radius:50%;background:var(--muted);opacity:.4}.exercise-stack{display:grid;gap:12px}.exercise-card{display:grid;grid-template-columns:auto minmax(0,1fr);gap:16px;padding:18px 0;border-top:1px solid var(--line);transition:background var(--transition-fast)}.exercise-card:first-child{padding-top:0;border-top:0}.exercise-rank,.outline-index{display:grid;place-items:center;font-weight:700}.exercise-rank{width:40px;height:40px;border-radius:50%;background:var(--accent-soft);color:var(--accent-deep);font-size:var(--text-md);transition:background var(--transition-fast),color var(--transition-fast)}.exercise-copy,.outline-copy{min-width:0;display:grid}.exercise-copy{gap:12px}.goal-copy{padding:14px 16px;border-radius:var(--radius-md);background:var(--ink-4);font-size:var(--text-md);color:var(--text-secondary)}.goal-panel,.license-panel{padding:18px}.license-panel p+p{margin-top:8px}.outline-compact-grid{display:grid;grid-template-columns:repeat(auto-fill,36px);gap:6px;padding:4px 0}.outline-compact-item{width:36px;height:36px;display:flex;align-items:center;justify-content:center;border-radius:50%;font-size:var(--text-sm);font-weight:600;color:var(--muted);background:#00000008;border:1.5px solid transparent;text-decoration:none;transition:all var(--transition-fast);cursor:pointer}.outline-compact-item:hover{background:var(--accent-8);color:var(--ink)}.outline-compact-item.active{background:var(--accent);color:#fff;border-color:var(--accent-deep);font-weight:700}.outline-compact-item.done{background:var(--ok);color:#fff}.outline-compact-item.done.active{background:var(--accent)}[data-theme=dark] .outline-compact-item{background:#ffffff0d}.outline-list{margin:0;padding:0;list-style:none;display:grid;gap:10px}.outline-link{display:grid;grid-template-columns:auto minmax(0,1fr);gap:10px;align-items:flex-start;padding:10px 12px;border:1px solid transparent;border-radius:var(--radius-md);background:transparent;transition:background var(--transition-base),border-color var(--transition-base),transform var(--transition-base),box-shadow var(--transition-base)}.outline-link:hover{background:var(--white-50);border-color:var(--line)}.outline-link.active{background:var(--accent-soft);border-color:var(--accent-25)}.outline-index{width:30px;height:30px;border-radius:var(--radius-pill);background:var(--ink-6);font-size:var(--text-sm)}.outline-copy{gap:4px}.muted-note{display:inline-flex;align-items:center;min-height:42px;font-size:var(--text-md)}@media(min-width:1081px){.browser-sidebar{position:sticky;top:20px;max-height:calc(100vh - 40px);overflow-y:auto}}@media(max-width:1080px){.browser-layout{grid-template-columns:1fr}}@media(max-width:860px){.app-shell{width:min(100vw - 20px,1320px);padding:20px 0 40px}.hero-inner{grid-template-columns:1fr;padding:var(--space-xl)}.hero-mascot-area{min-height:auto}.hero-mascot-area .mascot{height:120px}.browser-sidebar{display:none}.metric-grid,.course-grid,.detail-grid{grid-template-columns:1fr}.section-head,.course-card-head,.exercise-head{flex-direction:column;align-items:flex-start}.action-row.compact{justify-content:flex-start}.exercise-card{grid-template-columns:1fr}.exercise-rank{width:36px;height:36px}}.diagnostics-grid,.practice-grid,.practice-status-row,.session-grid{display:grid;gap:12px}.diagnostics-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.diagnostics-header{display:grid;gap:var(--space-md)}.diagnostics-page h1,.diagnostics-page 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#3b9ab24d}.midi-connect-btn.connected{background:var(--ok);border-color:var(--ok);color:#fff}.midi-connect-btn:disabled{opacity:.5;cursor:default}.device-chip{font-size:var(--text-sm);padding:3px 10px;border-radius:var(--radius-pill);background:#0b775e1f;color:var(--ok);font-weight:600}.bar-warn{font-size:var(--text-sm);color:var(--warn);font-weight:500}.practice-bar-progress{display:flex;align-items:center;gap:10px;flex:1;flex-wrap:wrap}.progress-fraction{font-size:1.6rem;font-weight:800;letter-spacing:-.04em;color:var(--ink);line-height:1}.progress-sep{color:var(--muted);font-weight:400;margin:0 1px}.progress-label{font-size:var(--text-sm);color:var(--muted);font-weight:500}.next-note-chip{font-size:var(--text-base);padding:6px 14px;border-radius:var(--radius-sm);background:var(--accent-soft);color:var(--accent-deep);font-weight:600;animation:chip-pulse 2s ease-in-out infinite}@keyframes chip-pulse{0%,to{box-shadow:0 0 #3b9ab200}50%{box-shadow:0 0 0 4px #3b9ab21f}}.next-note-chip 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.pedal-label{color:var(--warn)}.pedal-indicator.correct .pedal-label{color:var(--ok)}.pedal-hint{font-size:var(--text-xs);font-weight:600;padding:2px 8px;border-radius:var(--radius-pill);background:#dd8d291f;color:var(--warn)}.score-pedal{font-size:var(--text-sm);color:var(--warn);font-weight:600}.practice-bar-actions{display:flex;align-items:center;gap:8px;flex-wrap:wrap;flex-basis:100%;padding-top:10px;margin-top:2px;border-top:1px solid var(--line)}.tempo-display{font-size:var(--text-sm);color:var(--muted);white-space:nowrap;font-weight:600}.reset-btn{padding:6px 14px;border-radius:var(--radius-sm);border:1px solid var(--line);background:transparent;color:var(--muted);font-size:var(--text-sm);font-weight:600;cursor:pointer;font-family:inherit;transition:border-color var(--transition-fast),color var(--transition-fast);margin-left:auto}.reset-btn:hover{border-color:var(--accent);color:var(--accent)}.outline-panel{padding:20px;position:sticky;top:16px}@media(max-width:1080px){.exercise-layout{grid-template-columns:1fr}.outline-panel{position:static}}.mode-tabs{display:flex;gap:2px;background:var(--accent-soft);border-radius:var(--radius-pill);padding:3px;width:fit-content}.mode-tab{padding:5px 14px;border-radius:var(--radius-pill);border:1px solid transparent;background:transparent;color:var(--muted);font-size:var(--text-sm);font-weight:600;cursor:pointer;font-family:inherit;transition:background var(--transition-fast),color var(--transition-fast),box-shadow var(--transition-fast),border-color var(--transition-fast)}.mode-tab.active{background:#fff;color:var(--ink);font-weight:700;border-color:var(--accent-15);box-shadow:0 1px 4px #0000001a}.mode-tab:not(.active):hover{color:var(--ink);background:var(--accent-5)}.perform-panel{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius-md);-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);padding:20px 24px;display:flex;flex-direction:column;gap:16px}.perform-intro p{font-size:var(--text-md);color:var(--muted);margin:0}.perform-controls{display:flex;align-items:center;gap:16px;flex-wrap:wrap}.start-perform-btn{gap:6px;padding:10px 24px;font-size:var(--text-md)}.start-perform-btn:active{transform:scale(.98)}.perform-midi-row{display:flex;align-items:center;gap:8px;flex-wrap:wrap}.perform-countdown{display:flex;flex-direction:column;align-items:center;padding:var(--space-lg) 0;gap:8px}.count-number{font-size:5rem;font-weight:800;letter-spacing:-.06em;color:var(--accent);line-height:1;animation:pulse-count .3s ease-out}@keyframes 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var(--transition-fast);line-height:1}.score-zoom-btn:hover:not(:disabled){border-color:var(--accent);color:var(--accent)}.score-zoom-btn:disabled{opacity:.35;cursor:default}.score-zoom-label{font-size:var(--text-sm);color:var(--muted);min-width:36px;text-align:center;font-weight:600}.mode-tabs-row{display:flex;align-items:center;gap:12px}.preview-btn{display:inline-flex;align-items:center;gap:5px;padding:7px 14px;border-radius:9px;border:1px solid var(--line);background:#ffffffa6;color:var(--ink);font-size:var(--text-sm);font-weight:600;cursor:pointer;font-family:inherit;transition:background var(--transition-fast),border-color var(--transition-fast),color var(--transition-fast)}.preview-btn:hover:not(:disabled){border-color:var(--accent);color:var(--accent)}.preview-btn.previewing{opacity:.6;cursor:default}.practice-bar-wrap{position:relative;border-radius:var(--radius-md);overflow:hidden;background:var(--paper);border:1px solid var(--line);-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);box-shadow:var(--shadow-sm)}.practice-bar-fill{position:absolute;top:0;left:0;bottom:0;background:linear-gradient(90deg,#3b9ab20f,#3b9ab21f);pointer-events:none;transition:width .4s cubic-bezier(.16,1,.3,1);border-radius:0}.practice-bar-wrap .practice-bar{position:relative;background:transparent;border:none;border-radius:0;-webkit-backdrop-filter:none;backdrop-filter:none}.wrong-tally-chip,.wrong-count-chip{font-size:var(--text-sm);padding:3px 8px;border-radius:var(--radius-pill);background:#c933121a;color:var(--error);font-weight:600}.hand-tag{font-size:var(--text-xs);padding:2px 6px;border-radius:5px;font-weight:700;margin-left:4px}.hand-tag-right{background:var(--accent-12);color:var(--accent-deep)}.hand-tag-left{background:#f1bb7b2e;color:#c47a1a}.next-exercise-btn{display:inline-flex;align-items:center;gap:4px;padding:5px 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var(--line);background:#fff9;color:var(--muted);font-size:var(--text-sm);font-weight:600;cursor:pointer;font-family:inherit;transition:background var(--transition-fast),border-color var(--transition-fast),color var(--transition-fast);white-space:nowrap}.metronome-btn:hover,.sight-reading-btn:hover,.note-labels-btn:hover,.auto-loop-btn:hover{border-color:var(--accent);color:var(--accent-deep)}.metronome-btn.active,.sight-reading-btn.active,.note-labels-btn.active,.auto-loop-btn.active{background:var(--accent-soft);border-color:var(--accent-35);color:var(--accent-deep)}.loop-controls{display:inline-flex;align-items:center;gap:3px}.loop-input{width:38px;padding:4px 2px;text-align:center;border:1px solid var(--line);border-radius:6px;background:#fff9;color:var(--ink);font-size:var(--text-sm);font-weight:600;font-family:inherit}.loop-input:focus{outline:none;border-color:var(--accent)}.loop-dash{color:var(--muted);font-size:var(--text-sm)}.loop-section-btn{padding:5px 11px;border-radius:7px;border:1px solid var(--line);background:#fff9;color:var(--muted);font-size:var(--text-sm);font-weight:600;cursor:pointer;font-family:inherit;transition:background var(--transition-fast),color var(--transition-fast),border-color var(--transition-fast)}.loop-section-btn:hover{border-color:var(--accent);color:var(--accent-deep)}.loop-section-btn.active{background:var(--accent-soft);border-color:var(--accent-35);color:var(--accent-deep)}.loop-badge{display:inline-flex;align-items:center;padding:2px 8px;background:var(--accent-10);color:var(--accent-deep);border-radius:6px;font-weight:700;font-size:var(--text-sm);letter-spacing:.01em}.perform-score-actions{display:flex;gap:10px;align-items:center;margin-top:4px}.perform-stars{font-size:var(--text-md)}.panel-toggle-btn{padding:4px 8px;border-radius:var(--radius-sm);border:1px solid var(--line);background:transparent;color:var(--muted);font-size:var(--text-base);cursor:pointer;font-family:inherit;transition:background var(--transition-fast),color var(--transition-fast),border-color var(--transition-fast);line-height:1}.panel-toggle-btn:hover{border-color:var(--accent);color:var(--accent)}.panel-toggle-btn.expand{background:var(--accent-soft);border-color:transparent;color:var(--accent)}.sidebar-nav-actions{display:flex;gap:8px;align-items:center;flex-wrap:wrap}.sidebar-group{display:grid;gap:6px}.sidebar-group+.sidebar-group{margin-top:10px}.sidebar-group-label{padding:6px 0 2px;font-size:var(--text-xs);font-weight:700;text-transform:uppercase;letter-spacing:.12em;color:var(--muted);display:flex;align-items:center;gap:10px}.sidebar-group-label:after{content:"";flex:1;height:1px;background:var(--line)}.course-progress-bar-wrap{height:6px;border-radius:var(--radius-pill);background:var(--accent-8);overflow:hidden;margin-top:auto;padding-top:0}.course-progress-bar-fill{height:100%;border-radius:var(--radius-pill);background:var(--accent);transition:width .4s 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ease}.shelf-grid{display:grid;gap:8px;row-gap:4px}.shelf-col-header{text-align:center;font-size:var(--text-xs);font-weight:700;color:var(--muted);text-transform:uppercase;letter-spacing:.12em;padding-bottom:6px}.shelf-row-label{display:flex;align-items:center;justify-content:center;min-height:88px}.shelf-level-link{display:flex;align-items:center;justify-content:center;width:34px;height:34px;border-radius:50%;font-family:var(--font-display);font-size:1rem;font-weight:700;color:var(--muted);text-decoration:none;transition:all var(--transition-fast);border:1.5px solid transparent}.shelf-level-link:hover{background:var(--primary);color:#fff;border-color:var(--primary);transform:scale(1.1)}.shelf-level-num{font-family:var(--font-display);font-size:1rem;font-weight:700;color:var(--muted)}.shelf-cell{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;padding:12px 6px 8px;border-radius:var(--radius-sm);text-decoration:none;color:inherit;transition:all var(--transition-base);cursor:pointer;min-height:88px;border:1.5px solid transparent;position:relative;background-image:radial-gradient(circle 60px at var(--mx, 50%) var(--my, 50%),rgba(255,200,87,0),transparent)}.shelf-cell:hover{background-image:radial-gradient(circle 60px at var(--mx, 50%) var(--my, 50%),rgba(255,200,87,.18),transparent);transform:translateY(-5px) scale(1.03);box-shadow:var(--shadow-lg);z-index:2}.hover-note{position:absolute;top:-4px;right:6px;font-size:16px;color:var(--accent-gold);opacity:0;pointer-events:none;z-index:3}.hover-note:before{content:"♪"}.shelf-cell:hover .hover-note,.song-card:hover .hover-note{animation:note-rise .7s ease-out forwards}@keyframes 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cubic-bezier(.34,1.56,.64,1) both}.shelf-complete:before{content:"";position:absolute;inset:0;border-radius:inherit;background:linear-gradient(135deg,transparent 30%,rgba(255,255,255,.2) 50%,transparent 70%);background-size:250% 250%;animation:shelf-shimmer 4s ease-in-out 1;pointer-events:none;z-index:1}@keyframes shelf-shimmer{0%,to{background-position:0% 0%}50%{background-position:100% 100%}}.shelf-complete .trophy-icon{transform:scale(1.3);filter:drop-shadow(0 2px 8px rgba(255,200,87,.6)) drop-shadow(0 0 4px rgba(255,200,87,.3))}@keyframes shelf-complete-in{0%{transform:scale(.9);opacity:.5}to{transform:scale(1);opacity:1}}.shelf-cell:hover .trophy-icon{animation:trophy-wiggle .4s ease}@keyframes trophy-wiggle{0%{transform:rotate(0)}25%{transform:rotate(-8deg)}75%{transform:rotate(8deg)}to{transform:rotate(0)}}.shelf-complete .shelf-cell-bar-fill{background:var(--accent-warm)}.shelf-complete .shelf-cell-label{color:var(--accent-gold)}.shelf-placeholder{min-height:88px;border-radius:var(--radius-sm);background:#00000004;opacity:.5}.shelf-row-full{padding:0}.shelf-cell-wide{display:flex;align-items:center;gap:12px;padding:14px 18px;border-radius:var(--radius-md);text-decoration:none;color:inherit;transition:all var(--transition-base);cursor:pointer;border:1.5px solid transparent}.shelf-cell-wide:hover{transform:translateY(-2px);box-shadow:var(--shadow-md)}.shelf-row-level{font-family:var(--font-display);font-size:1.5rem;font-weight:700;color:var(--muted);width:36px;height:36px;display:flex;align-items:center;justify-content:center;text-align:center;flex-shrink:0;background:#00000008;border-radius:50%}[data-theme=dark] .shelf-row-level{background:#ffffff0d}.shelf-wide-title{flex:1;font-size:var(--text-base);font-weight:600}.shelf-wide-progress{font-size:var(--text-sm);color:var(--muted);font-weight:600;white-space:nowrap}.shelf-wide-bar{width:80px;flex-shrink:0}.shelf-tier-beginner{padding:20px 16px}.shelf-tier-mastery{border-top:2px solid var(--accent)}.shelf-tier-mastery .shelf-cell-label{font-weight:800}.shelf-tier-beginner.shelf-pending{background:var(--accent-5)}.shelf-tier-intermediate.shelf-pending{background:linear-gradient(145deg,var(--accent-6),var(--gold-6))}.shelf-tier-mastery.shelf-pending{background:linear-gradient(145deg,var(--gold-8),rgba(241,187,123,.08))}.shelf-tier-mastery{border-top-color:var(--accent-gold)}@keyframes cellEnter{0%{opacity:0;transform:translateY(12px) scale(.92)}to{opacity:1;transform:translateY(0) scale(1)}}.catalog-triptych .shelf-cell,.catalog-triptych .shelf-cell-wide{animation:cellEnter .4s cubic-bezier(.16,1,.3,1) both;animation-delay:calc(var(--cell-idx, 0) * 30ms + .2s)}.catalog-triptych .song-card{animation:cellEnter .4s cubic-bezier(.16,1,.3,1) both;animation-delay:calc(var(--cell-idx, 0) * 60ms + .2s)}.song-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.song-card{display:flex;flex-direction:column;align-items:center;gap:8px;padding:var(--space-lg) var(--space-md);border-radius:var(--radius-md);text-decoration:none;color:inherit;transition:all var(--transition-base);cursor:pointer;border:1.5px solid transparent;text-align:center;position:relative;background-image:radial-gradient(circle 60px at var(--mx, 50%) var(--my, 50%),rgba(255,200,87,0),transparent)}.song-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);background-image:radial-gradient(circle 60px at var(--mx, 50%) var(--my, 50%),rgba(255,200,87,.18),transparent)}.song-card-emoji{display:flex;align-items:center;justify-content:center;color:var(--accent-gold);opacity:.7;transition:opacity var(--transition-base),transform 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.shelf-pending{background:var(--accent-8);border-color:var(--accent-10)}.shelf-technique .shelf-pending{background:#dd8d2912;border-color:#dd8d291a}.shelf-songs .shelf-pending,.shelf-songs .song-card.shelf-pending{background:var(--gold-8);border-color:var(--gold-10)}[data-theme=dark] .shelf-pending{background:var(--white-4);border-color:transparent}[data-theme=dark] .shelf-method .shelf-pending{background:var(--accent-8);border-color:var(--accent-10)}[data-theme=dark] .shelf-technique .shelf-pending{background:#dd8d2914;border-color:#dd8d291a}[data-theme=dark] .shelf-songs .shelf-pending,[data-theme=dark] .shelf-songs .song-card.shelf-pending{background:var(--gold-8);border-color:var(--gold-10)}[data-theme=dark] .shelf-pending .shelf-cell-label{color:var(--muted)}[data-theme=dark] .shelf-progress{background:linear-gradient(145deg,#78b7c514,#78b7c529);border-color:#78b7c538;animation-name:shelf-breathe-dark}@keyframes shelf-breathe-dark{0%,to{border-color:#78b7c526;box-shadow:0 0 #78b7c500}50%{border-color:#78b7c566;box-shadow:0 0 12px #78b7c50f}}[data-theme=dark] .shelf-complete{background:linear-gradient(145deg,#ffc8571f,#ffc85740);border-color:var(--gold-20);box-shadow:inset 0 0 12px #ffc85726,0 0 16px #ffc85714,var(--shadow-sm)}[data-theme=dark] .shelf-complete .shelf-cell-label{color:var(--accent-gold)}[data-theme=dark] .shelf-placeholder{border-color:#faefd10f}[data-theme=dark] .shelf-cell-bar{background:#ffffff14}[data-theme=dark] .shelf-cell-wide{background:#ffffff0a;border-color:#faefd10f}[data-theme=dark] .shelf-cell-wide:hover{background:#ffffff12}[data-theme=dark] .song-card.shelf-pending{background:#ffffff0a;border-color:#faefd114}[data-theme=dark] .shelf-tier-beginner.shelf-pending{background:var(--accent-6)}[data-theme=dark] .shelf-tier-intermediate.shelf-pending{background:linear-gradient(145deg,var(--accent-8),var(--gold-6))}[data-theme=dark] .shelf-tier-mastery.shelf-pending{background:linear-gradient(145deg,var(--gold-10),rgba(241,187,123,.06))}@media(max-width:640px){.shelf-grid{gap:4px}.shelf-cell{min-height:72px;padding:8px 4px 6px}.shelf-cell .trophy-icon{width:20px;height:20px}.shelf-cell-fraction,.shelf-cell-stars{display:none}.song-grid{grid-template-columns:1fr;gap:8px}.song-card{flex-direction:row;text-align:left;gap:12px}.song-card-title{flex:1}}.progress-empty-state{display:flex;flex-direction:column;align-items:center;text-align:center;gap:var(--space-lg);padding:var(--space-3xl) var(--space-xl);border:1px solid var(--line);border-radius:var(--radius-xl);background:var(--accent-3)}.progress-empty-state h3{font-family:var(--font-display);font-size:1.4rem;margin:0}.progress-empty-state p{color:var(--text-secondary);max-width:40ch;margin:0}.progress-header{display:grid;gap:var(--space-lg);margin-bottom:var(--space-xl)}.progress-header .section-head{padding:0}.progress-header .progress-actions .secondary{font-size:var(--text-sm);padding:6px 14px}.progress-journey{display:grid;gap:var(--space-md);padding:var(--space-xl);background:linear-gradient(135deg,#3b9ab214,#ffc8570f);border-radius:var(--radius-xl);border:1px solid var(--line)}.journey-bar{height:8px;background:#0000000f;border-radius:4px;overflow:hidden}.journey-bar-fill{height:100%;border-radius:4px;background:linear-gradient(90deg,var(--primary),var(--accent-warm));transition:width .6s cubic-bezier(.16,1,.3,1)}.journey-stats{display:flex;align-items:center;gap:16px;font-size:var(--text-base);color:var(--muted)}.journey-stat strong{font-family:var(--font-display);font-size:1.3rem;color:var(--accent-gold);margin-right:4px}.journey-dot{width:4px;height:4px;border-radius:50%;background:var(--muted);opacity:.3}[data-theme=dark] .progress-journey{background:linear-gradient(135deg,#78b7c51f,#ffc85714);border-color:#faefd114}[data-theme=dark] .journey-bar{background:#ffffff14}.catalog-triptych{display:grid;grid-template-columns:1fr 1fr 1fr;gap:var(--space-lg);align-items:stretch}.catalog-triptych>.shelf-section{animation:reveal-up .6s cubic-bezier(.16,1,.3,1) both}.catalog-triptych>.shelf-section:nth-child(1){animation-delay:0ms}.catalog-triptych>.shelf-section:nth-child(2){animation-delay:.12s}.catalog-triptych>.shelf-section:nth-child(3){animation-delay:.24s}.catalog-triptych .shelf-section{padding:var(--space-lg) var(--space-md) var(--space-md)}.catalog-triptych .shelf-title{font-size:1.2rem}.catalog-triptych .shelf-header{margin-bottom:var(--space-md);flex-direction:column;align-items:flex-start;gap:var(--space-sm)}.catalog-triptych .shelf-header-bar{width:100%}.catalog-triptych .shelf-cell,.catalog-triptych .song-card,.catalog-triptych .shelf-cell-wide{animation:cell-appear .45s cubic-bezier(.16,1,.3,1) both;animation-delay:calc(var(--cell-idx, 0) * 30ms + .2s)}@keyframes cell-appear{0%{opacity:0;transform:scale(.88) translateY(6px)}to{opacity:1;transform:scale(1) translateY(0)}}.catalog-triptych .shelf-cell{min-height:70px;padding:8px 4px 6px;gap:3px}.catalog-triptych .shelf-cell .trophy-icon{width:20px;height:20px}.catalog-triptych .shelf-cell-watermark{font-size:1.8rem}.catalog-triptych .shelf-cell-fraction{font-size:.56rem}.catalog-triptych .shelf-cell-stars{display:none}.catalog-triptych .shelf-row-label{min-height:70px}.catalog-triptych .shelf-songs{display:flex;flex-direction:column}.catalog-triptych .song-grid{grid-template-columns:1fr 1fr;gap:8px;flex:1}.catalog-triptych .song-card{padding:var(--space-sm) var(--space-sm);gap:4px}.catalog-triptych .song-card-title{font-size:var(--text-sm)}.catalog-triptych .song-card-emoji svg{width:20px;height:20px}.catalog-triptych .song-card-level{font-size:var(--text-2xs)}.catalog-triptych .song-card-fraction{font-size:var(--text-xs)}@media(max-width:1100px){.catalog-triptych{grid-template-columns:1fr 1fr}}@media(max-width:740px){.catalog-triptych{grid-template-columns:1fr}}.sidebar-shelves{display:flex;flex-direction:column;gap:var(--space-md)}.sidebar-shelf{display:flex;flex-direction:column;gap:var(--space-sm)}.sidebar-shelf-label{font-size:var(--text-xs);font-weight:700;text-transform:uppercase;letter-spacing:.1em;color:var(--muted);padding-bottom:2px;border-bottom:1px solid var(--line)}.sidebar-shelf-grid{display:grid;gap:3px}.sidebar-shelf-cell{display:flex;align-items:center;justify-content:center;padding:6px 4px;border-radius:var(--radius-sm);text-decoration:none;transition:all var(--transition-fast);border:1.5px solid transparent;cursor:pointer;min-height:32px}.sidebar-shelf-cell:hover{transform:translateY(-1px);box-shadow:var(--shadow-sm);z-index:2}.sidebar-shelf-celltext{font-size:var(--text-2xs);font-weight:700;letter-spacing:.05em;text-transform:uppercase;color:var(--ink)}.sidebar-shelf-cell-wide{display:flex;align-items:center;justify-content:center;padding:5px 8px;border-radius:var(--radius-sm);text-decoration:none;transition:all var(--transition-fast);border:1.5px solid transparent;cursor:pointer;min-height:28px}.sidebar-shelf-cell-wide:hover{box-shadow:var(--shadow-sm)}.sidebar-shelf-empty{min-height:32px;border-radius:var(--radius-sm);background:#00000004;opacity:.3}.shelf-active{border-color:var(--primary)!important;box-shadow:0 0 0 2px #3b9ab233}.shelf-active .sidebar-shelf-celltext{color:var(--primary)}.sidebar-shelf-list{display:flex;flex-direction:column;gap:3px}[data-theme=dark] .browser-sidebar>.panel{background:#1e1a164d}[data-theme=dark] .sidebar-shelf-cell,[data-theme=dark] .sidebar-shelf-cell-wide{background:#ffffff0a;border-color:#ffffff0f}[data-theme=dark] .sidebar-shelf-cell:hover,[data-theme=dark] .sidebar-shelf-cell-wide:hover{background:#ffffff14}[data-theme=dark] .sidebar-shelf-celltext{color:var(--ink)}[data-theme=dark] .shelf-active{border-color:var(--accent)!important;box-shadow:0 0 0 2px #78b7c540}[data-theme=dark] .shelf-active .sidebar-shelf-celltext{color:var(--accent)}[data-theme=dark] .sidebar-shelf-empty{border-color:#ffffff0a}[data-theme=dark] .sidebar-shelf-cell.shelf-progress,[data-theme=dark] .sidebar-shelf-cell-wide.shelf-progress{background:var(--accent-10);border-color:var(--accent-18)}[data-theme=dark] .sidebar-shelf-cell.shelf-complete,[data-theme=dark] .sidebar-shelf-cell-wide.shelf-complete{background:var(--gold-10);border-color:var(--gold-18)}.metric-denom{font-size:.65em;font-weight:400;color:var(--muted)}.outline-index-done{background:#0b775e26;color:var(--ok)}.outline-stars{font-size:var(--text-sm);color:var(--star-3);letter-spacing:.04em}.rank-check{color:var(--ok)}.exercise-card.completed .exercise-rank{background:#0b775e1f;color:var(--ok)}.pill-complete{background:#0b775e24;color:var(--ok)}.progress-actions{display:flex;gap:10px;flex-wrap:wrap;align-items:center}.progress-course-list{display:grid;gap:12px}.progress-course-row{display:grid;gap:4px}.progress-course-head{display:flex;align-items:baseline;gap:8px;flex-wrap:wrap}.progress-course-title{font-weight:700;color:var(--ink);text-decoration:none;transition:color var(--transition-fast)}.progress-course-title:hover{color:var(--accent)}.progress-course-meta{font-size:var(--text-sm);color:var(--muted);font-weight:600}.progress-course-fraction{font-size:var(--text-sm);color:var(--muted);margin-left:auto;font-weight:600}.progress-star-summary{display:flex;gap:4px}.star-chip{font-size:var(--text-xs);padding:2px 7px;border-radius:var(--radius-pill);font-weight:600}.star-3{background:var(--star-3-bg);color:#b8941a}.star-2{background:var(--star-2-bg);color:#a08530}.star-1{background:var(--star-1-bg);color:var(--muted)}.import-msg{margin-top:8px;font-size:var(--text-md);color:var(--ok);font-weight:600}@keyframes celebrate{0%{transform:scale(1.15)}50%{transform:scale(.95)}to{transform:scale(1)}}@keyframes fade-in{0%{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}.screen-stack>*{animation:fade-in .35s cubic-bezier(.16,1,.3,1)}@keyframes reveal-up{0%{opacity:0;transform:translateY(28px)}to{opacity:1;transform:translateY(0)}}.reveal{opacity:0;animation:reveal-up .6s cubic-bezier(.16,1,.3,1) 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at 25% 45%,var(--accent) 50%,transparent 50%),radial-gradient(circle 3px at 65% 75%,var(--star-2) 50%,transparent 50%),radial-gradient(circle 4px at 45% 20%,var(--accent-warm) 50%,transparent 50%),radial-gradient(circle 3px at 80% 80%,var(--primary-light) 50%,transparent 50%),radial-gradient(circle 4px at 50% 50%,var(--accent-gold) 50%,transparent 50%);animation:confetti-burst 1s cubic-bezier(.16,1,.3,1) both;pointer-events:none;z-index:0}@keyframes confetti-burst{0%{opacity:1;transform:translate(-50%,-50%) scale(.2)}60%{opacity:1}to{opacity:0;transform:translate(-50%,-50%) scale(1.8)}}.celebration-card{position:relative;background:#faefd1d9;-webkit-backdrop-filter:blur(24px) saturate(1.4);backdrop-filter:blur(24px) saturate(1.4);border:1px solid rgba(255,255,255,.5);border-radius:var(--radius-xl);box-shadow:0 24px 80px #322a1938,0 8px 24px #322a191f,inset 0 1px #ffffff80;padding:48px 56px 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0%,transparent 70%);animation:glow-burst 1.2s ease-out forwards;pointer-events:none;z-index:-1}@keyframes glow-burst{0%{transform:translate(-50%) scale(.3);opacity:1}to{transform:translate(-50%) scale(2.5);opacity:0}}.celebration-title{font-family:var(--font-display);font-size:2rem;font-weight:800;letter-spacing:-.03em;margin:0;color:var(--ink);line-height:1.1}.celebration-subtitle{font-size:var(--text-md);color:var(--muted);margin:0}.celebration-stats{display:flex;gap:var(--space-md);font-size:var(--text-base);color:var(--muted);font-weight:600}.celebration-stat-ok,.celebration-stat-warn{display:inline-flex;align-items:center;gap:4px}.celebration-stat-ok{color:var(--ok)}.celebration-stat-warn{color:var(--warn)}.celebration-actions{display:flex;gap:12px;margin-top:8px}.celebration-btn{padding:11px 28px}.celebration-particles{position:absolute;inset:0;pointer-events:none;overflow:hidden}.celebration-particle{position:absolute;border-radius:50%;animation:particle-rise 1.6s ease-out forwards}@keyframes particle-rise{0%{opacity:1;transform:translateY(0) scale(1)}to{opacity:0;transform:translateY(-120px) scale(.3)}}.tools-toggle{padding:5px 12px;border-radius:7px;border:1px solid var(--line);background:var(--white-60);color:var(--muted);font-size:var(--text-sm);font-weight:600;cursor:pointer;font-family:inherit;transition:background var(--transition-fast),border-color var(--transition-fast),color var(--transition-fast);white-space:nowrap;display:inline-flex;align-items:center;gap:4px}.tools-toggle:hover{border-color:var(--accent);color:var(--accent-deep)}.tools-toggle.open{background:var(--accent-soft);border-color:var(--accent-35);color:var(--accent-deep)}.tools-toggle-arrow{font-size:var(--text-xs);transition:transform var(--transition-fast)}.tools-toggle.open .tools-toggle-arrow{transform:rotate(180deg)}.practice-bar-tools{animation:tools-reveal .2s ease-out}@keyframes tools-reveal{0%{opacity:0;transform:translateY(-4px)}to{opacity:1;transform:translateY(0)}}.tool-group{display:inline-flex;align-items:center;gap:4px;padding-right:10px;margin-right:6px;border-right:1px solid var(--line)}.tool-group:last-child{border-right:none;padding-right:0;margin-right:0}.tool-group-label{font-size:var(--text-2xs);font-weight:700;color:var(--muted);text-transform:uppercase;letter-spacing:.08em;margin-right:2px}.course-card[data-category=method]{border-left:3px solid var(--primary)}.course-card[data-category=technique]{border-left:3px solid var(--success)}.course-card[data-category=songs]{border-left:3px solid var(--warning)}.course-card[data-category=method] .eyebrow{color:var(--primary)}.course-card[data-category=technique] .eyebrow{color:var(--success)}.course-card[data-category=songs] .eyebrow{color:var(--warning)}.course-card[data-category=method] .course-progress-bar-fill{background:var(--primary)}.course-card[data-category=technique] 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.95);--ink: #FAEFD1;--muted: #a89e94;--accent: #78B7C5;--accent-deep: #5ca3b5;--accent-soft: rgba(120, 183, 197, .14);--accent-3: rgba(120, 183, 197, .03);--accent-5: rgba(120, 183, 197, .05);--accent-6: rgba(120, 183, 197, .06);--accent-8: rgba(120, 183, 197, .08);--accent-10: rgba(120, 183, 197, .1);--accent-12: rgba(120, 183, 197, .12);--accent-15: rgba(120, 183, 197, .15);--accent-20: rgba(120, 183, 197, .2);--accent-25: rgba(120, 183, 197, .25);--accent-30: rgba(120, 183, 197, .3);--accent-35: rgba(120, 183, 197, .35);--accent-40: rgba(120, 183, 197, .4);--gold-6: rgba(255, 200, 87, .05);--gold-8: rgba(255, 200, 87, .06);--gold-10: rgba(255, 200, 87, .08);--gold-12: rgba(255, 200, 87, .1);--gold-15: rgba(255, 200, 87, .12);--gold-18: rgba(255, 200, 87, .15);--gold-20: rgba(255, 200, 87, .18);--gold-25: rgba(255, 200, 87, .22);--ink-3: rgba(250, 239, 209, .03);--ink-4: rgba(250, 239, 209, .04);--ink-5: rgba(250, 239, 209, .05);--ink-6: rgba(250, 239, 209, .06);--ink-10: rgba(250, 239, 209, .1);--ink-15: rgba(250, 239, 209, .15);--white-4: rgba(255, 255, 255, .04);--white-6: rgba(255, 255, 255, .06);--white-8: rgba(255, 255, 255, .08);--white-45: rgba(255, 255, 255, .07);--white-50: rgba(255, 255, 255, .08);--white-56: rgba(255, 255, 255, .1);--white-60: rgba(255, 255, 255, .12);--white-80: rgba(255, 255, 255, .15);--line: rgba(250, 239, 209, .09);--ok: #5da86a;--warn: #DD8D29;--text-secondary: #D9B382;--surface: #55332C;--border-warm: #7F5539;--error: #e54f2e;--piano-key-white: #e8dfd2;--piano-key-black: #1e1a16;--accent-gold: #E1BD6D;--accent-warm: #FFC857;--star-3: #FFC857;--star-3-bg: rgba(255, 200, 87, .15);--star-2-bg: rgba(225, 189, 109, .12);--star-1-bg: rgba(217, 179, 130, .08);background:radial-gradient(circle at top left,rgba(120,183,197,.06),transparent 32%),radial-gradient(circle at bottom right,rgba(85,51,44,.12),transparent 28%),linear-gradient(180deg,#151210,#1e1a16)}[data-theme=dark] .score-viewer-wrap{background:#1e1a16;box-shadow:0 4px 16px #0003,inset 0 0 0 1px #faefd10f}[data-theme=dark] .score-viewer{background:#fffbf4f2;border-radius:var(--radius-md);padding:var(--space-md);box-shadow:inset 0 0 20px #0000000d}[data-theme=dark] kbd{background:#ffffff12;border-color:#faefd126;box-shadow:0 1px #0003;color:var(--muted)}[data-theme=dark] .mode-tab.active{background:#ffffff1f;color:var(--ink);border-color:var(--accent-15);box-shadow:0 2px 6px #0003}[data-theme=dark] .course-nav-link,[data-theme=dark] .outline-link,[data-theme=dark] .input-card,[data-theme=dark] .metric-card,[data-theme=dark] .detail-stat{background:#ffffff0a}[data-theme=dark] .action-link.secondary,[data-theme=dark] .secondary-button{background:#ffffff12}[data-theme=dark] .panel,[data-theme=dark] .status-card{background:var(--paper)}[data-theme=dark] .top-nav{border-bottom-color:#78b7c514;box-shadow:0 1px #78b7c50a}[data-theme=dark] .hero-copy{background:transparent}[data-theme=dark] .shelf-method{background:linear-gradient(135deg,rgba(59,154,178,.06) 0%,var(--paper) 100%)}[data-theme=dark] .shelf-technique{background:linear-gradient(135deg,rgba(221,141,41,.06) 0%,var(--paper) 100%)}[data-theme=dark] .shelf-songs{background:linear-gradient(135deg,rgba(255,200,87,.06) 0%,var(--paper) 100%)}[data-theme=dark] .surface-card{background:var(--paper);box-shadow:var(--shadow-sm)}[data-theme=dark] .piano-keyboard-wrap{background:linear-gradient(180deg,#2a2520,#1e1a16);border-color:#faefd10f;box-shadow:0 4px 12px #0000004d,0 1px 3px #0003,inset 0 1px #ffffff0d}[data-theme=dark] .hero-copy h1{background:linear-gradient(135deg,var(--ink) 30%,var(--accent) 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}[data-theme=dark] .hero-panel{background-color:transparent;background-image:linear-gradient(135deg,#78b7c55c,#ffc85738 40%,#f1bb7b4d)}[data-theme=dark] .hero-inner:before{background:repeating-linear-gradient(to bottom,transparent,transparent 15px,rgba(120,183,197,.08) 15px,rgba(120,183,197,.08) 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.celebration-btn.secondary{background:#ffffff12}[data-theme=dark] .celebration-btn.primary{color:#1e1a16}[data-theme=dark] .tools-toggle{background:#ffffff0f}[data-theme=dark] .tools-toggle.open{background:var(--accent-soft)}[data-theme=dark] .tempo-select-btn,[data-theme=dark] .metronome-btn,[data-theme=dark] .sight-reading-btn,[data-theme=dark] .note-labels-btn,[data-theme=dark] .auto-loop-btn,[data-theme=dark] .loop-section-btn{background:#ffffff14;border-color:#faefd11f;color:var(--muted)}[data-theme=dark] .tempo-select-btn:hover,[data-theme=dark] .metronome-btn:hover,[data-theme=dark] .sight-reading-btn:hover,[data-theme=dark] .note-labels-btn:hover,[data-theme=dark] .auto-loop-btn:hover,[data-theme=dark] .loop-section-btn:hover{border-color:var(--accent);color:var(--accent)}[data-theme=dark] .tempo-select-btn.active,[data-theme=dark] .metronome-btn.active,[data-theme=dark] .sight-reading-btn.active,[data-theme=dark] .note-labels-btn.active,[data-theme=dark] 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ease-out}.scroll-to-top:hover{transform:translateY(-3px);box-shadow:var(--shadow-xl)}.scroll-to-top:active{transform:scale(.93)}.exercise-table{width:100%;border-collapse:separate;border-spacing:0}.exercise-table-row{display:grid;grid-template-columns:36px 1fr auto;gap:12px;align-items:center;padding:12px 16px;border-bottom:1px solid var(--line);transition:all var(--transition-fast);text-decoration:none;color:inherit}.exercise-table-row:last-child{border-bottom:none}.exercise-table-row:nth-child(2n){background:#00000006}.exercise-table-row:hover{background:var(--accent-6);transform:translate(4px)}.exercise-table-row:hover .exercise-table-num{color:var(--accent)}.exercise-table-row.row-complete{border-left:3px solid var(--ok);padding-left:13px;background:#0b775e0a}.exercise-table-row.current-exercise{background:var(--accent-soft);border-radius:var(--radius-md);border-bottom-color:transparent}.exercise-table-num{font-size:var(--text-sm);font-weight:700;color:var(--text-secondary, 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h3{font-family:var(--font-display);font-size:var(--text-lg);font-weight:700;margin:0;flex:1;min-width:0}.course-table-header .trophy-icon{flex-shrink:0}.course-table-header .progress-ring{width:36px;height:36px}.course-table-header .progress-ring svg{width:36px;height:36px}.course-table-header .progress-ring-text{font-size:.6rem}.course-table-level{font-size:var(--text-xs);font-weight:700;color:var(--muted);text-transform:uppercase;letter-spacing:.08em}.course-table-progress{font-size:var(--text-sm);color:var(--muted);font-weight:600;white-space:nowrap}.course-table-chevron{font-size:var(--text-lg);color:var(--muted);transition:transform var(--transition-base);flex-shrink:0}.course-table-chevron.open{transform:rotate(90deg)}.course-table-section .exercise-table{border-top:1px solid var(--line);padding:0 8px 8px;animation:tools-reveal .25s ease-out}@media(max-width:860px){.exercise-table-row{grid-template-columns:28px 1fr auto;gap:8px;padding:10px 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