:root{color-scheme:dark;--bg: #101214;--panel: #171b1f;--panel-2: #20262b;--line: #333b42;--text: #f0f2ec;--muted: #9da7a0;--accent: #85b38b;--accent-2: #d9a441;--accent-3: #c27664;--blue: #7897b5;--shadow: 0 10px 28px rgba(0, 0, 0, .22)}*{box-sizing:border-box}body{margin:0;min-width:320px;min-height:100vh;background:var(--bg);color:var(--text);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;letter-spacing:0}button,input,textarea{font:inherit}button,a{-webkit-tap-highlight-color:transparent}.app-shell{display:grid;grid-template-columns:232px minmax(0,1fr);min-height:100vh}.sidebar{position:sticky;top:0;height:100vh;padding:22px 14px;border-right:1px solid var(--line);background:#121517eb;-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px)}.brand{display:flex;gap:12px;align-items:center;padding:8px;margin-bottom:22px}.brand-mark{display:grid;width:42px;height:42px;place-items:center;border:1px solid #52624f;border-radius:8px;color:var(--accent);background:#20251f}.brand p,.brand span{margin:0}.brand p{font-size:18px;font-weight:740}.brand span{color:var(--muted);font-size:12px}.nav-list{display:grid;gap:6px}.nav-item,.ghost-action,.primary-action,.icon-button,.settings-button{display:inline-flex;min-height:42px;align-items:center;justify-content:center;gap:8px;border:1px solid transparent;border-radius:8px;color:var(--text);text-decoration:none;cursor:pointer}.nav-item{justify-content:flex-start;width:100%;padding:0 12px;background:transparent;color:var(--muted)}.nav-item.active,.nav-item:hover{border-color:#3d493d;background:#20261f;color:var(--text)}.main{min-width:0;padding:26px}.screen{width:min(980px,100%);margin:0 auto}.page-header{display:flex;min-height:86px;align-items:flex-start;justify-content:space-between;gap:18px;margin-bottom:22px}.eyebrow{margin:0 0 8px;color:var(--accent);font-size:13px;font-weight:700;text-transform:uppercase}h1,h2,p{margin-top:0}h1{margin-bottom:0;font-size:clamp(32px,6vw,64px);line-height:.96;letter-spacing:0}h2{margin-bottom:10px;font-size:21px;line-height:1.25;letter-spacing:0}h3{margin:0 0 10px;font-size:15px;line-height:1.35}p{color:var(--muted);line-height:1.75}.mode-switch,.difficulty-row{display:inline-flex;padding:4px;border:1px solid var(--line);border-radius:8px;background:var(--panel)}.mode-switch button,.difficulty-row button{min-width:72px;height:34px;border:0;border-radius:6px;background:transparent;color:var(--muted);cursor:pointer}.mode-switch button.selected,.difficulty-row button.selected{background:#2c382c;color:var(--text)}.overview-band,.today-summary{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1px;margin-bottom:18px;border:1px solid var(--line);border-radius:8px;overflow:hidden;background:var(--line)}.overview-band>div{min-height:94px;padding:18px;background:var(--panel)}.today-summary{padding:10px;gap:10px;background:var(--panel)}.today-summary span{display:grid;min-height:42px;place-items:center;border:1px solid #2d363b;border-radius:8px;background:#121619;color:var(--text);font-weight:720}.metric-label,.info span{display:block;margin-bottom:7px;color:var(--muted);font-size:12px}.overview-band strong,.info strong{color:var(--text);font-weight:700;line-height:1.55}.practice-list{display:grid;gap:14px}.exercise-card,.detail-panel,.focus-panel,.reflection-form,.lesson-form,.policy-panel{border:1px solid var(--line);border-radius:8px;background:#171b1ff0;box-shadow:var(--shadow)}.exercise-card{padding:16px}.exercise-card.featured{padding:18px;border-color:#52644d;background:#181f1a}.exercise-card.featured h2{font-size:26px}.exercise-card.compact{box-shadow:none}.exercise-top{display:grid;grid-template-columns:42px minmax(0,1fr);gap:14px}.step-number{display:grid;width:42px;height:42px;place-items:center;border-radius:8px;background:#242b2f;color:var(--accent-2);font-weight:800}.tag-row{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:12px}.tag{display:inline-flex;min-height:26px;align-items:center;padding:0 9px;border:1px solid #4d5f51;border-radius:999px;background:#20291f;color:#b8d1b6;font-size:12px;font-weight:700}.tag.subtle{border-color:#45494f;background:#23272c;color:var(--muted)}.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;margin-top:16px}.small-grid{grid-template-columns:repeat(4,minmax(0,1fr))}.info{min-height:74px;padding:13px;border:1px solid #2e363c;border-radius:8px;background:#14181b}.simple-meta{display:flex;flex-wrap:wrap;gap:8px;margin:14px 0 0}.simple-meta span{min-height:30px;padding:6px 10px;border:1px solid #303940;border-radius:8px;background:#121619;color:var(--muted);font-size:13px}.upcoming-panel{margin-top:14px}.upcoming-toggle{display:grid;grid-template-columns:minmax(0,1fr) auto auto;gap:10px;align-items:center;width:100%;min-height:52px;padding:0 14px;border:1px solid var(--line);border-radius:8px;background:#15191c;color:var(--text);cursor:pointer;text-align:left}.upcoming-toggle strong{color:var(--accent-2)}.upcoming-list{display:grid;gap:12px;margin-top:12px}.action-row{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin-top:16px}.sticky-actions{justify-content:flex-end}.primary-action{min-width:156px;padding:0 16px;border-color:#66805f;background:#31422d;color:#f5f7ef;font-weight:750}.primary-action.inline{width:fit-content;margin-top:18px}.ghost-action,.icon-button{padding:0 13px;border-color:var(--line);background:#1d2226;color:var(--text)}.icon-button{width:42px;min-width:42px;padding:0}.why-panel{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin-top:14px;padding-top:14px;border-top:1px solid var(--line)}.why-panel.always{border-top:0;padding-top:0}.answer-example{display:grid;grid-template-columns:minmax(260px,.8fr) minmax(340px,1fr);gap:14px;margin-top:14px;padding:14px;border:1px solid #334036;border-radius:8px;background:#141a16}.answer-example.compact{grid-template-columns:1fr;box-shadow:none}.answer-copy p{margin:10px 0 0;font-size:13px}.section-label{display:inline-flex;margin-bottom:8px;color:var(--accent-2);font-size:12px;font-weight:800}.answer-lines{display:grid;gap:8px}.answer-lines div{display:grid;gap:4px;padding:10px;border:1px solid #2d3630;border-radius:8px;background:#101511}.answer-lines span{color:var(--muted);font-size:12px}.answer-lines strong{color:var(--text);line-height:1.45}.fingering-line{display:grid;gap:5px;margin-top:10px;padding:10px;border:1px solid #3a4438;border-radius:8px;background:#111711}.fingering-line span{color:var(--accent);font-size:12px;font-weight:800}.fingering-line strong{color:var(--text);font-size:13px;line-height:1.55}.fretboard{min-width:0;overflow-x:auto;padding:10px;border:1px solid #303940;border-radius:8px;background:#101417}.fret-row{display:grid;grid-template-columns:28px repeat(var(--frets, 8),54px);grid-auto-columns:54px;min-width:max-content}.fret-numbers{color:var(--muted);font-size:11px}.fret-numbers span{display:grid;min-height:20px;place-items:center}.string-name{display:grid;place-items:center;color:var(--accent);font-weight:800}.fret-cell{position:relative;display:grid;min-height:48px;place-items:center;border-left:1px solid #465057;border-bottom:1px solid #343c42}.fret-cell:before{position:absolute;left:0;right:0;top:50%;height:2px;background:#5e676e;content:""}.note-dot{position:relative;z-index:1;display:grid;min-width:38px;min-height:34px;place-items:center;padding:3px 6px;border:1px solid #c49d49;border-radius:8px;background:#d9a441;color:#17120a;font-size:12px;font-weight:900;line-height:1}.note-dot small{font-size:10px;font-weight:800}.note-dot b{position:absolute;right:-7px;top:-7px;display:grid;width:18px;height:18px;place-items:center;border:1px solid #101417;border-radius:50%;background:#f0f2ec;color:#151515;font-size:10px;font-weight:900}.lesson-answer-list{display:grid;gap:12px;margin-top:14px}.lesson-answer{padding-top:12px;border-top:1px solid var(--line)}.player-layout{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(320px,.75fr);gap:18px}.focus-panel,.reflection-form,.lesson-form,.detail-panel,.policy-panel{padding:22px}.pulse-line{height:72px;margin-bottom:22px;border:1px solid #384148;border-radius:8px;background:linear-gradient(90deg,transparent 0 7%,rgba(217,164,65,.5) 7% 8%,transparent 8% 24%,rgba(120,151,181,.5) 24% 25%,transparent 25% 50%,rgba(194,118,100,.5) 50% 51%,transparent 51% 75%,rgba(133,179,139,.5) 75% 76%,transparent 76%),#14181b}.large-instruction{color:var(--text);font-size:22px;line-height:1.7}.reflection-form,.lesson-form{display:grid;gap:14px}label{display:grid;gap:7px;color:var(--muted);font-size:13px}input,textarea{width:100%;border:1px solid var(--line);border-radius:8px;background:#101417;color:var(--text);outline:none}input{height:42px;padding:0 12px}textarea{min-height:112px;resize:vertical;padding:12px}input:focus,textarea:focus{border-color:#6f8a66}.check-row{display:grid;gap:8px}.check-row label{display:flex;align-items:center}.check-row input{width:18px;height:18px}.summary-copy{margin:18px 0;padding:18px;border-left:3px solid var(--accent);background:#171d19;color:var(--text);line-height:1.8}.two-column{display:grid;grid-template-columns:minmax(0,.9fr) minmax(320px,.8fr);gap:18px}.skill-list{display:grid;gap:9px}.skill-row{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:16px;align-items:center;min-height:54px;padding:0 14px;border:1px solid var(--line);border-radius:8px;background:var(--panel);color:var(--text);text-align:left;cursor:pointer}.skill-row.active{border-color:#62785d;background:#20281f}.status-pill{display:inline-flex;min-height:28px;align-items:center;justify-content:center;padding:0 10px;border:1px solid #3b4449;border-radius:999px;background:#20252a;color:var(--muted);font-size:12px;font-weight:800;white-space:nowrap}.status-pill.hot{border-color:#756335;background:#302817;color:#e3c170}.status-pill.active{border-color:#52644d;background:#20291f;color:#b8d1b6}.status-pill.review{border-color:#465d72;background:#18222a;color:#abc4dc}.status-pill.base{border-color:#565d64;color:#d0d4d1}.log-table{display:grid;gap:8px}.log-row{display:grid;grid-template-columns:110px minmax(220px,1fr) 110px 100px 100px;gap:12px;align-items:center;min-height:54px;padding:10px 14px;border:1px solid var(--line);border-radius:8px;background:var(--panel);color:var(--muted)}.log-row strong{color:var(--text)}.empty{padding:22px;border:1px solid var(--line);border-radius:8px;background:var(--panel)}.settings-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.phrase-tabs{margin-bottom:18px}.phrase-grid{display:grid;gap:14px}.phrase-card-meta,.phrase-basic-grid,.now-playing{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px}.phrase-card-meta{grid-template-columns:repeat(2,minmax(0,1fr));margin-top:14px}.phrase-card-meta .info:last-child{grid-column:1 / -1}.phrase-basic-grid,.now-playing{margin-bottom:14px}.phrase-player{display:grid;gap:14px;margin:18px 0;padding:16px;border:1px solid #334036;border-radius:8px;background:#141a16}.phrase-player-actions{display:flex;flex-wrap:wrap;gap:10px}.progress-track{height:12px;overflow:hidden;border:1px solid #303940;border-radius:999px;background:#101417}.progress-track span{display:block;height:100%;border-radius:inherit;background:var(--accent-2);transition:width .12s linear}.player-controls-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px}.range-control,.toggle-control,.play-state{min-height:58px;padding:10px 12px;border:1px solid #2e363c;border-radius:8px;background:#101417}.range-control input{height:24px;padding:0}.toggle-control{display:flex;align-items:center;gap:10px;color:var(--text);font-weight:720}.toggle-control input{width:20px;height:20px}.play-state{display:flex;align-items:center;gap:8px;color:var(--muted);font-weight:760}.play-state.active{border-color:#756335;color:#e3c170}.measure-timeline{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px;margin-bottom:14px}.measure-card{min-height:132px;padding:12px;border:1px solid var(--line);border-radius:8px;background:var(--panel)}.measure-card.active{border-color:#c49d49;background:#211c12}.measure-card span{color:var(--muted);font-size:12px}.measure-card strong{display:block;margin:6px 0 10px;color:var(--text);font-size:20px}.measure-notes{display:flex;flex-wrap:wrap;gap:6px}.measure-notes span,.note-chip,.tab-cell{display:inline-flex;min-height:28px;align-items:center;justify-content:center;padding:4px 8px;border:1px solid #303940;border-radius:8px;background:#101417;color:var(--muted);font-size:12px;font-weight:720}.measure-notes span.active,.note-chip.active,.tab-cell.active{border-color:#d9a441;background:#d9a441;color:#17120a}.phrase-accordions{display:grid;gap:10px}.phrase-accordion{border:1px solid var(--line);border-radius:8px;background:#171b1ff0;overflow:hidden}.phrase-accordion summary{min-height:52px;padding:15px;color:var(--text);cursor:pointer;font-weight:800}.phrase-accordion>div{padding:0 15px 15px;border-top:1px solid var(--line)}.tab-measures,.phrase-note-rows,.scale-list{display:grid;gap:12px}.tab-row,.note-chip-row{display:flex;flex-wrap:wrap;gap:8px}.practice-steps{margin:0;padding-left:22px;color:var(--text);line-height:1.8}.settings-button{justify-content:flex-start;min-height:78px;padding:0 18px;border-color:var(--line);background:var(--panel);font-weight:750}.import-button{cursor:pointer}.import-button input{display:none}.settings-message{display:grid;min-height:78px;align-items:center;margin:0;padding:0 18px;border:1px solid #334036;border-radius:8px;background:#141a16;color:var(--text)}.policy-panel{display:flex;gap:12px}.policy-panel h2{font-size:18px}@media(max-width:900px){.app-shell{grid-template-columns:1fr}.sidebar{position:sticky;z-index:2;height:auto;padding:10px;border-right:0;border-bottom:1px solid var(--line)}.brand{display:none}.nav-list{display:grid;grid-template-columns:repeat(7,minmax(0,1fr));gap:4px}.nav-item{justify-content:center;min-height:46px;padding:0}.nav-item span{display:none}.main{padding:18px}.page-header{display:grid}.overview-band,.today-summary,.card-grid,.why-panel,.player-layout,.two-column,.answer-example,.settings-grid,.phrase-card-meta,.phrase-basic-grid,.now-playing,.player-controls-grid,.measure-timeline,.log-row{grid-template-columns:1fr}}@media(max-width:540px){.main{padding:14px}h1{font-size:40px}.exercise-top{grid-template-columns:1fr}.step-number{width:36px;height:36px}.skill-row{grid-template-columns:1fr}.primary-action,.ghost-action,.settings-button,.phrase-player-actions>button{width:100%}}
