:root{color-scheme:dark;--bg:#10131b;--card:#1b2030;--muted:#a8b1c3;--line:#353c4e;--accent:#9d8cff;--good:#5be0a6;--bad:#ff8895}*{box-sizing:border-box}body{margin:0;min-height:100vh;background:radial-gradient(ellipse at 50% 0%,#282443 0%,var(--bg) 65%);font-family:system-ui,-apple-system,Segoe UI,sans-serif;color:#f6f5ff;display:flex;justify-content:center;padding:35px 16px}.app{width:min(650px,100%)}header{display:flex;justify-content:space-between;align-items:center;margin-bottom:28px}.logo{font-size:25px;font-weight:850;letter-spacing:-.8px}.logo span{color:var(--accent)}.badge{color:var(--muted);font-size:13px}.panel{border:1px solid var(--line);background:var(--card);border-radius:22px;padding:clamp(22px,5vw,38px);box-shadow:0 22px 60px #0004}h1{font-size:clamp(29px,5vw,41px);letter-spacing:-1.3px;margin:0 0 10px}p{color:var(--muted);line-height:1.5;margin:0 0 26px}.field{margin:24px 0}.field label{display:block;font-weight:750;margin-bottom:10px}.hint{display:block;color:var(--muted);font-size:13px;margin-top:8px}select,input,button{font:inherit}select,input{width:100%;background:#111522;color:#fff;border:1px solid #465068;border-radius:12px;padding:14px 15px;outline:none}select:focus,input:focus{border-color:var(--accent)}.choices{display:grid;grid-template-columns:repeat(3,1fr);gap:9px}.choice{background:#131827;border:1px solid var(--line);color:#d4d8e3;padding:13px 8px;border-radius:12px;cursor:pointer;font-weight:700}.choice.selected{background:#302b50;border-color:var(--accent);color:#fff}.primary{background:var(--accent);color:#151322;border:0;border-radius:12px;padding:15px 22px;font-weight:850;cursor:pointer}.primary:hover{filter:brightness(1.1)}.wide{width:100%;margin-top:12px}.secondary{background:transparent;border:1px solid var(--line);border-radius:11px;color:#e7e6f5;padding:10px 14px;cursor:pointer}.topline{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-bottom:25px}.eyebrow{color:var(--accent);font-weight:800;font-size:12px;letter-spacing:1.3px;text-transform:uppercase}.stats{display:flex;gap:12px;flex-wrap:wrap;font-size:13px;color:var(--muted)}.stats strong{color:#fff}.question{font-size:clamp(29px,5vw,40px);line-height:1.2;letter-spacing:-1px;font-weight:800;margin:14px 0 30px}.answer{display:flex;gap:10px}.answer input{flex:1;min-width:0;font-size:19px}.feedback{border-radius:14px;padding:17px;margin-top:20px;line-height:1.55}.feedback.correct{background:#153c34;color:#b4f6d9}.feedback.wrong{background:#432731;color:#ffd4da}.feedback.revealed{background:#2c3145;color:#e4e7ff}.explanation{color:#d0d5e2;margin-top:10px;font-size:14px}.map{margin-top:13px;font-size:13px;line-height:1.8;color:#d3d7e4}.actions{display:flex;gap:10px;align-items:center;justify-content:space-between;margin-top:18px}.hidden{display:none!important}.footer{font-size:13px;color:var(--muted);text-align:center;margin-top:18px}.kbd{font-family:monospace;border:1px solid #4a5061;border-radius:5px;padding:1px 5px}@media(max-width:480px){.choices{grid-template-columns:1fr}.answer{flex-direction:column}.answer .primary{width:100%}.topline{align-items:flex-start;flex-direction:column}}

.activity{display:grid;grid-template-columns:repeat(3,1fr);gap:9px}.activity button{min-height:88px;text-align:left}.activity small{display:block;color:var(--muted);font-weight:400;margin-top:7px}.activity .selected small{color:#d5ceff}.fret-options{display:none}.fret-options.show{display:block}.board-scroll{overflow-x:auto;padding:14px 0 8px}.board{min-width:700px;display:grid;grid-template-columns:62px repeat(13,minmax(43px,1fr));gap:0;position:relative;border-radius:12px;background:#242938;padding:12px 6px}.string-name,.fret-label{display:flex;align-items:center;justify-content:center;color:#bfc8d7;font-size:12px;font-weight:750}.fret-label{height:24px}.fretcell{position:relative;height:51px;border:0;border-right:2px solid #647080;border-bottom:1px solid #4e5968;background:transparent;color:#fff;cursor:pointer}.fretcell::before{content:"";position:absolute;top:50%;left:0;right:0;height:2px;background:#8c98a8;pointer-events:none}.fretcell.open{border-right:5px solid #c6cad2}.fretcell .dot{position:relative;z-index:2;width:32px;height:32px;margin:auto;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:850;font-size:12px}.fretcell.picked .dot{background:#9d8cff;color:#121323}.fretcell.hit .dot{background:var(--good);color:#12241e}.fretcell.miss .dot{background:var(--bad);color:#2c0b12}.fretcell.solution .dot{outline:2px solid var(--good);color:var(--good)}.fretcell:disabled{cursor:default}.board .string-name{height:51px}.board .fret-label:first-child{grid-column:1}.fret-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:12px}.note-status{color:var(--muted);font-size:14px;margin:12px 0}.fieldrow{display:grid;grid-template-columns:1fr 1fr;gap:12px}.subheading{color:#c5cbe0;font-size:13px;margin-top:12px}.fullboard{width:min(1040px,100%)}.fullboard .panel{padding:clamp(16px,3vw,32px)}@media(max-width:620px){.activity{grid-template-columns:1fr}.fieldrow{grid-template-columns:1fr}.board{min-width:680px}}