.guitar-lesson{--lesson-paper: color-mix(in oklch, var(--background) 92%, #f4e5d3);--lesson-ink-soft: color-mix( in oklch, var(--foreground) 68%, transparent );--lesson-rule: color-mix(in oklch, var(--border) 80%, #b45309);--lesson-amber: #b45309;--lesson-amber-soft: color-mix(in oklch, var(--background) 84%, #f4e5d3);--lesson-red: #b3261e;--lesson-red-soft: color-mix(in oklch, var(--background) 86%, #f6dedb);--lesson-green: #1e6b3a;--lesson-green-soft: color-mix(in oklch, var(--background) 86%, #e7f0e3);--lesson-dark: color-mix(in oklch, var(--foreground) 90%, #22201d);color:var(--foreground);font-size:1rem;line-height:1.75}.guitar-lesson .lesson-header{margin-bottom:2.5rem}.guitar-lesson h1{margin-top:1rem;font-size:clamp(2.25rem,8vw,4.25rem);line-height:1;font-weight:500}.guitar-lesson .lesson-meta{color:var(--muted-foreground);margin-top:1rem;max-width:42rem;font-family:var(--font-mono);font-size:.75rem;line-height:1.6;text-transform:uppercase}.guitar-lesson p{margin:1rem 0;color:color-mix(in oklch,var(--foreground) 78%,transparent)}.guitar-lesson h2{border-top:1px solid var(--border);margin:3rem 0 1rem;padding-top:1rem;font-size:1.5rem;font-weight:500;line-height:1.25}.guitar-lesson h3{color:var(--foreground);font-size:1.2rem;font-weight:500;line-height:1.25}.guitar-lesson ul,.guitar-lesson ol{margin:1rem 0;padding-left:1.4rem}.guitar-lesson li{margin:.45rem 0;color:color-mix(in oklch,var(--foreground) 80%,transparent)}.guitar-lesson strong{color:var(--foreground);font-weight:500}.guitar-lesson .mono,.guitar-lesson .notes-seq,.guitar-lesson table{font-family:var(--font-mono);font-size:.92em}.guitar-lesson .notes-seq{display:block;margin:1rem 0;color:var(--lesson-red);font-weight:700;letter-spacing:.18em;text-align:center}.guitar-lesson .callout,.guitar-lesson .tip,.guitar-lesson .practice{border-radius:8px;margin:1.5rem 0;padding:1rem 1.1rem}.guitar-lesson .callout{background:var(--lesson-amber-soft);border-left:4px solid var(--lesson-amber)}.guitar-lesson .tip{background:var(--lesson-red-soft);border-left:4px solid var(--lesson-red)}.guitar-lesson .practice{background:var(--lesson-green-soft);border-left:4px solid var(--lesson-green)}.guitar-lesson .tag{display:block;margin-bottom:.25rem;font-family:var(--font-mono);font-size:.75rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase}.guitar-lesson .callout .tag{color:var(--lesson-amber)}.guitar-lesson .tip .tag{color:var(--lesson-red)}.guitar-lesson .practice .tag{color:var(--lesson-green)}.guitar-lesson .callout>:first-child,.guitar-lesson .tip>:first-child,.guitar-lesson .practice>:first-child{margin-top:0}.guitar-lesson .callout>:last-child,.guitar-lesson .tip>:last-child,.guitar-lesson .practice>:last-child{margin-bottom:0}.guitar-lesson .steps{counter-reset:step;list-style:none;padding-left:0}.guitar-lesson .steps li{counter-increment:step;min-height:1.9rem;padding-left:2.7rem;position:relative}.guitar-lesson .steps li:before{align-items:center;background:var(--lesson-dark);border-radius:999px;color:var(--background);content:counter(step);display:flex;font-family:var(--font-mono);font-size:.8rem;height:1.75rem;justify-content:center;left:0;line-height:1;position:absolute;top:.2rem;width:1.75rem}.guitar-lesson table{border-collapse:collapse;margin:1.25rem 0;width:100%}.guitar-lesson th,.guitar-lesson td{border-bottom:1px solid var(--border);padding:.45rem .6rem;text-align:left;vertical-align:top}.guitar-lesson th{color:var(--muted-foreground);font-size:.75rem;font-weight:600;letter-spacing:.08em;text-transform:uppercase}.guitar-lesson .chord-grid{display:grid;gap:1rem;grid-template-columns:repeat(3,minmax(0,1fr));margin:1.5rem 0}.guitar-lesson .chord-card{background:var(--lesson-paper);border:1px solid var(--border);border-radius:8px;padding:.85rem;text-align:center}.guitar-lesson .chord-card .chord-name{margin:0 0 .5rem}.guitar-lesson .chord-notes{color:var(--muted-foreground);font-family:var(--font-mono);font-size:.75rem;letter-spacing:.08em;margin:.25rem 0 0}.guitar-lesson figure.fretboard{border:1px solid var(--border);border-radius:8px;margin:1.5rem 0;overflow-x:auto;padding:1rem}.guitar-lesson .chord-card figure.fretboard{background:var(--background);margin:0 0 .5rem;padding:.5rem}.guitar-lesson figure.fretboard svg{display:block;height:auto;min-width:34rem;width:100%}.guitar-lesson .chord-card figure.fretboard svg{min-width:0}.guitar-lesson .fb-string-label,.guitar-lesson .fb-fretnum{fill:var(--muted-foreground);font-family:var(--font-mono);font-size:12px}.guitar-lesson .fb-fretline{stroke:var(--lesson-rule);stroke-width:1}.guitar-lesson .fb-nut{fill:var(--foreground)}.guitar-lesson .fb-notename{font-family:var(--font-mono);font-size:11px;font-weight:700}.guitar-lesson .fb-legend{color:var(--muted-foreground);display:flex;flex-wrap:wrap;font-family:var(--font-mono);font-size:.75rem;gap:.65rem 1.4rem;justify-content:center;margin-top:.75rem}.guitar-lesson .fb-legend span{align-items:center;display:inline-flex;gap:.35rem}.guitar-lesson .fb-swatch{border-radius:999px;display:inline-block;height:.8rem;width:.8rem}.guitar-lesson .fb-swatch.root{background:var(--lesson-red)}.guitar-lesson .fb-swatch.scale{background:var(--lesson-dark)}.guitar-lesson .fb-swatch.chord{background:var(--lesson-amber)}.guitar-lesson .quiz{background:var(--lesson-paper);border:1px solid var(--border);border-radius:8px;margin:1.5rem 0;padding:1rem}.guitar-lesson .quiz-question{color:var(--foreground);font-weight:500;margin:0 0 .75rem}.guitar-lesson .quiz-option{background:var(--background);border:1px solid var(--border);border-radius:8px;color:var(--foreground);cursor:pointer;display:block;font:inherit;margin:.5rem 0;padding:.55rem .8rem;text-align:left;transition:background .12s ease,border-color .12s ease,color .12s ease;width:100%}.guitar-lesson .quiz-option:hover:not(.quiz-locked){background:var(--lesson-amber-soft);border-color:var(--lesson-amber)}.guitar-lesson .quiz-option.quiz-correct{background:var(--lesson-green-soft);border-color:var(--lesson-green);color:var(--lesson-green);font-weight:700}.guitar-lesson .quiz-option.quiz-wrong{background:var(--lesson-red-soft);border-color:var(--lesson-red);color:var(--lesson-red);text-decoration:line-through}.guitar-lesson .quiz-option.quiz-locked{cursor:default}.guitar-lesson .quiz-feedback{border-radius:8px;margin-top:.75rem;padding:.65rem .85rem}.guitar-lesson .quiz-feedback.quiz-pass{background:var(--lesson-green-soft);color:var(--lesson-green)}.guitar-lesson .quiz-feedback.quiz-fail{background:var(--lesson-red-soft);color:var(--lesson-red)}.guitar-lesson .course-nav{border-top:1px solid var(--border);display:flex;flex-wrap:wrap;gap:.75rem;justify-content:space-between;margin-top:3rem;padding-top:1rem}@media (max-width: 680px){.guitar-lesson .chord-grid{grid-template-columns:1fr}}