@layer reset, tokens, layout, components, responsive;
@layer reset {
  *,*::before,*::after{box-sizing:border-box}body,h1,h2,h3,p{margin:0}button,input,select{font:inherit}button,a,input,select{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{cursor:default;opacity:.36}button{color:inherit}a{color:inherit;text-decoration:none}button,input,select{outline-offset:4px}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible{outline:2px solid var(--accent-strong)}[hidden]{display:none!important}svg{max-width:100%}input,select{min-width:0}button{touch-action:manipulation}body{min-width:320px}::selection{background:var(--accent);color:var(--accent-ink)}
}
@layer tokens {
  :root{color-scheme:light;--bg:#f5f4f0;--surface:#fffefa;--surface-2:#eeede7;--surface-hover:#e9e7de;--text:#28312e;--muted:#7b8178;--faint:#a3a79e;--border:#e3e4db;--accent:#dfb77a;--accent-strong:#aa7738;--accent-soft:#f4ebdb;--accent-ink:#3b3020;--green:#7d9787;--danger:#ab4d40;--shadow:0 3px 14px #28312e03;--video:#171d1c;--radius:15px;--font:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;font-family:var(--font);font-size:14px;color:var(--text);background:var(--bg)}
  :root[data-theme=dark]{color-scheme:dark;--bg:#141918;--surface:#1b2220;--surface-2:#232b28;--surface-hover:#2d3731;--text:#e7e9e1;--muted:#919b91;--faint:#626e64;--border:#303a33;--accent:#dcb77b;--accent-strong:#e6c58c;--accent-soft:#353023;--accent-ink:#29271d;--green:#a2bca8;--danger:#e3a091;--shadow:0 4px 18px #0000000a;--video:#101614}
  @media(prefers-color-scheme:dark){:root:not([data-theme]){color-scheme:dark;--bg:#141918;--surface:#1b2220;--surface-2:#232b28;--surface-hover:#2d3731;--text:#e7e9e1;--muted:#919b91;--faint:#626e64;--border:#303a33;--accent:#dcb77b;--accent-strong:#e6c58c;--accent-soft:#353023;--accent-ink:#29271d;--green:#a2bca8;--danger:#e3a091;--shadow:0 4px 18px #0000000a;--video:#101614}}
  body{background:var(--bg);line-height:1.5}h1,h2,h3{font-weight:550;letter-spacing:-.025em}button{border:0;background:none}input[type=text],input:not([type]),select{background:var(--surface);border:1px solid var(--border);border-radius:8px;padding:11px 12px;color:var(--text)}input[type=checkbox]{accent-color:var(--accent-strong);width:20px;height:20px}input[type=range]{accent-color:var(--accent-strong);cursor:pointer}input::placeholder{color:var(--faint)}
}
@layer layout {
  music-tutor-app{display:block}mt-video-player,mt-transport,mt-bookmarks,mt-practice-assistant{display:block}mt-preferences,mt-library{display:contents}
  .app-header{height:83px;padding:0 clamp(24px,5vw,80px);display:flex;align-items:center;justify-content:space-between;gap:24px;border-bottom:1px solid var(--border);background:var(--surface)}
  .brand{display:flex;align-items:center;gap:11px;font-size:25px;font-weight:650;letter-spacing:-1.2px}.brand img{border-radius:11px}.brand-light{font-weight:400}.brand-dot{color:var(--accent-strong)}
  .header-nav{display:flex;gap:32px;align-items:center;margin-left:auto;margin-right:38px;height:100%}.nav-current{position:relative;height:100%;display:flex;align-items:center;font-weight:600}.nav-current::after{content:'';position:absolute;bottom:0;height:3px;width:22px;left:calc(50% - 11px);background:var(--accent);border-radius:3px 3px 0 0}.nav-button{display:flex;align-items:center;gap:8px;color:var(--muted);min-height:48px}.nav-button:hover{color:var(--text)}
  .header-tools{display:flex;align-items:center;gap:7px}.prototype-pill{font-size:9px;font-weight:650;letter-spacing:1.5px;color:var(--muted);border:1px solid var(--border);border-radius:5px;padding:5px 8px;margin-right:10px}
  .workspace{max-width:1490px;margin:0 auto;padding:38px clamp(24px,5vw,80px) 22px}.workspace-heading{display:flex;align-items:center;justify-content:space-between;margin-bottom:30px;gap:20px}.workspace-eyebrow{display:flex;align-items:center;gap:8px;color:var(--muted);font-size:10px;letter-spacing:1.8px;font-weight:600;margin-bottom:10px}.workspace-eyebrow mt-icon{font-size:14px;color:var(--accent-strong)}h1{font-size:34px;line-height:1.3;font-weight:500;letter-spacing:-1.1px}h1>span{color:var(--accent-strong)}.workspace-heading p{margin-top:8px;color:var(--muted);font-size:13px}.heading-open{align-self:flex-end;margin-bottom:3px}
  .workspace-grid{display:grid;grid-template-columns:minmax(0,1fr) 310px;gap:26px;align-items:start}.practice-column{min-width:0}.assistant-column{display:grid;gap:18px}.workspace-footer{display:flex;align-items:center;justify-content:space-between;gap:16px;border-top:1px solid var(--border);margin-top:30px;padding:20px 0 0;font-size:11px;color:var(--muted)}.workspace-footer>span:first-child{display:flex;gap:7px;align-items:center}.workspace-footer .text-button{font-size:11px;min-height:32px}
}
@layer components {
  .button{min-height:44px;border-radius:8px;padding:10px 16px;display:inline-flex;align-items:center;justify-content:center;gap:8px;font-size:12px;font-weight:550;white-space:nowrap;transition:background .15s,transform .15s}.button:hover:not(:disabled){transform:translateY(-1px)}.button.accent{background:var(--accent);color:var(--accent-ink);box-shadow:0 2px 0 #0000000b}.button.accent:hover{filter:brightness(1.04)}.button.subtle{background:var(--surface);border:1px solid var(--border)}.button.subtle:hover{background:var(--surface-2)}.button.ghost{color:var(--muted)}.button.ghost:hover{background:var(--surface-2)}.icon-button{width:42px;height:44px;display:inline-flex;align-items:center;justify-content:center;border-radius:8px;color:var(--muted);font-size:17px;flex-shrink:0}.icon-button:hover:not(:disabled){background:var(--surface-2);color:var(--text)}.icon-button.small{width:32px;height:36px;font-size:14px}.text-button{display:inline-flex;align-items:center;justify-content:center;gap:6px;min-height:40px;color:var(--muted);font-size:12px;padding:4px}.text-button:hover{color:var(--text)}.eyebrow{font-size:9px;letter-spacing:1.6px;color:var(--muted);font-weight:600}.sr-only{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
  .player-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}.player-topline{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:15px 19px;min-height:55px}.video-title{display:flex;align-items:center;gap:9px;min-width:0}.video-title h2{font-size:12px;font-weight:550;letter-spacing:0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.video-status-dot{width:6px;height:6px;flex-shrink:0;background:var(--faint);border-radius:50%}.video-status-dot.loaded{background:var(--green)}.video-meta{color:var(--faint);font-size:8px;letter-spacing:1.4px;white-space:nowrap}
  .video-stage{position:relative;background:var(--video);aspect-ratio:16/9;min-height:330px;overflow:hidden}.tutorial-video{width:100%;height:100%;display:block;object-fit:contain;position:absolute;inset:0}.player-empty{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;flex-direction:column;text-align:center;color:#e8e8dd;padding:28px 20px;overflow:hidden;isolation:isolate}.stage-eyebrow{font-size:8px;letter-spacing:2.3px;color:#9da79d;margin-bottom:18px}.stage-grid{position:absolute;inset:0;background-image:linear-gradient(#9baf9d08 1px,transparent 1px),linear-gradient(90deg,#9baf9d08 1px,transparent 1px);background-size:42px 42px;z-index:-2;mask-image:radial-gradient(ellipse at center,#000 20%,transparent 72%)}.stage-glow{position:absolute;width:320px;height:170px;top:10%;left:calc(50% - 160px);background:radial-gradient(ellipse,#d5b2760c,transparent 65%);z-index:-1}.player-empty h2{font-family:Georgia,'Times New Roman',serif;font-weight:400;font-size:25px;letter-spacing:-.5px;line-height:1.3}.player-empty p{font-size:11px;color:#8d9a91;margin:9px 0 19px}.player-empty .button{font-size:11px;min-height:40px;padding:9px 18px;background:#dfb77a;color:#332b1e}.demo-link{font-size:10px!important;color:#8b998e!important;min-height:30px;margin-top:9px}.demo-link:hover{color:#e8e8dd!important}.demo-link mt-icon{width:12px;height:12px}
  .piano-art{width:265px;height:91px;position:relative;margin-bottom:24px;perspective:450px}.keyboard-art{position:absolute;bottom:0;left:0;right:0;height:53px;display:flex;gap:2px;transform:rotateX(22deg) rotateZ(-3deg);box-shadow:0 8px 0 #121714,0 10px 24px #0005;padding:5px 4px 3px;background:#111715;border-radius:5px}.white-key{flex:1;height:100%;display:block;background:linear-gradient(#cccfc3,#ebe9d9);border-radius:0 0 2px 2px;position:relative;box-shadow:inset 0 -3px 0 #9faaa1}.white-key.lit{background:linear-gradient(#d2a866,#edcc91);box-shadow:inset 0 -3px 0 #aa874e,0 0 11px #cfb17927}.white-key b{position:absolute;left:65%;top:0;width:65%;height:62%;background:linear-gradient(90deg,#151e19,#29392c);z-index:1;border-radius:0 0 2px 2px;box-shadow:1px 2px 1px #0009}.falling-note{position:absolute;width:10px;border-radius:3px;background:linear-gradient(#b69863aa,#d1b079);box-shadow:0 0 14px #d1b07911}.n1{height:25px;left:59px;top:0;transform:rotate(-3deg)}.n2{height:12px;left:126px;top:21px;transform:rotate(-3deg);background:#839f8d}.n3{height:31px;left:177px;top:-7px;transform:rotate(-3deg)}.n4{height:9px;left:59px;top:-15px;background:#d1b07955;transform:rotate(-3deg)}
  mt-transport{padding:18px 20px 0}.timeline{display:flex;gap:12px;align-items:center;font-size:10px;font-variant-numeric:tabular-nums;color:var(--muted)}.scrub-wrap{position:relative;flex:1;display:flex;align-items:center;height:20px}.scrub-wrap input{appearance:none;width:100%;height:3px;margin:0;background:linear-gradient(to right,var(--accent) var(--progress,0%),var(--border) var(--progress,0%));border-radius:3px;z-index:2}.scrub-wrap input::-webkit-slider-thumb{appearance:none;width:9px;height:9px;background:var(--accent);border:0;border-radius:50%;box-shadow:0 0 0 3px var(--surface)}.scrub-wrap input::-moz-range-thumb{width:9px;height:9px;background:var(--accent);border:0;border-radius:50%}.scrub-wrap::before{content:'';position:absolute;inset:-10px 0;pointer-events:none}.timeline-markers{position:absolute;inset:0;pointer-events:none;z-index:1}.timeline-markers i{position:absolute;top:1px;width:2px;height:17px;background:var(--accent);opacity:.7}.loop-region{position:absolute;top:5px;height:10px;background:var(--accent-soft);border-radius:2px;pointer-events:none}.transport-row{display:flex;justify-content:space-between;align-items:center;margin:9px 0 15px;gap:12px}.transport-primary,.transport-secondary{display:flex;align-items:center;gap:8px}.transport-primary{gap:11px}.play-button{width:43px;height:43px;display:flex;align-items:center;justify-content:center;background:var(--text);color:var(--surface);border-radius:50%;font-size:19px;transition:transform .15s}.play-button:hover:not(:disabled){transform:scale(1.05)}.skip-button{position:relative}.speed-select select{border:0;background:var(--surface-2);font-size:11px;border-radius:6px;padding:8px 22px 8px 10px;min-height:34px;font-weight:600}.loop-strip{border-top:1px solid var(--border);display:flex;align-items:center;gap:17px;min-height:57px}.loop-toggle{display:flex;gap:7px;align-items:center;font-size:11px;color:var(--muted);min-height:44px;padding:0}.loop-toggle[aria-pressed=true]{color:var(--accent-strong)}.loop-toggle[aria-pressed=true] mt-icon{color:var(--accent-strong)}.loop-points{display:flex;align-items:center;gap:9px}.loop-points button:not(.icon-button){display:flex;align-items:center;gap:6px;font-size:10px;min-height:40px;color:var(--muted);padding:0}.loop-points b{display:flex;align-items:center;justify-content:center;width:18px;height:18px;border:1px solid var(--border);font-size:9px;border-radius:4px;color:var(--text)}.loop-dash{color:var(--faint);font-size:10px}.loop-hint{font-size:9px;color:var(--faint);margin-left:auto}.video-loading,.countdown-overlay,.video-drop-overlay{position:absolute;inset:0;z-index:5;background:#111a18e8;display:flex;align-items:center;justify-content:center;flex-direction:column;gap:15px;color:#efe9dd}.video-loading{font-size:12px}.countdown-overlay>span{font-size:72px;font-family:Georgia,serif;color:#dfb77a}.countdown-overlay small{color:#aab5a7}.countdown-overlay .button{color:#bbb}.video-drop-overlay{border:2px dashed #dfb77a;margin:10px;border-radius:8px;font-size:18px;color:#dfb77a}.spinner{width:25px;height:25px;border:2px solid #dfb77a33;border-top-color:#dfb77a;border-radius:50%;animation:spin 1s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}
  mt-bookmarks{margin-top:27px}.section-heading{display:flex;justify-content:space-between;align-items:center;margin-bottom:17px;gap:12px}.section-heading h2{font-size:16px;margin-top:3px}.bookmark-count{margin-left:5px;display:inline-flex;align-items:center;justify-content:center;min-width:21px;height:21px;padding:0 5px;background:var(--surface-2);color:var(--muted);font-size:10px;border-radius:5px;font-weight:450;vertical-align:middle}.bookmark-empty{display:flex;align-items:center;gap:14px;min-height:91px;border:1px dashed var(--border);border-radius:11px;padding:19px 22px}.empty-symbol{width:39px;height:43px;display:flex;align-items:center;justify-content:center;color:var(--faint);background:var(--surface-2);border-radius:9px;font-size:20px}.bookmark-empty h3{font-size:12px;font-weight:500;letter-spacing:0}.bookmark-empty p{font-size:11px;color:var(--muted);margin-top:5px}.bookmark-empty kbd{margin-left:auto;color:var(--faint);font-family:var(--font);border:1px solid var(--border);border-radius:5px;padding:2px 6px;font-size:10px}.bookmark-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.bookmark-item{display:flex;align-items:center;border:1px solid var(--border);border-radius:10px;background:var(--surface);overflow:hidden;min-width:0}.bookmark-item.is-current{border-color:var(--accent)}.bookmark-jump{display:flex;align-items:center;gap:11px;text-align:left;padding:13px 10px 13px 13px;flex:1;min-width:0}.bookmark-jump>span:nth-child(2){flex:1;min-width:0}.bookmark-jump strong{display:block;font-size:12px;font-weight:500;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.bookmark-jump small{display:block;font-size:10px;color:var(--muted);font-variant-numeric:tabular-nums;margin-top:2px}.bookmark-jump>mt-icon{width:12px;color:var(--faint)}.bookmark-number{width:27px;height:32px;background:var(--surface-2);border-radius:6px;display:flex;align-items:center;justify-content:center;color:var(--muted);font-size:10px;flex-shrink:0}.is-current .bookmark-number{background:var(--accent-soft);color:var(--accent-strong)}.bookmark-actions{display:flex;padding-right:4px}.bookmark-form{margin-top:12px;background:var(--surface);border:1px solid var(--accent);padding:16px;border-radius:10px;display:flex;align-items:flex-end;gap:14px}.bookmark-form label{flex:1;font-size:11px;color:var(--muted)}.bookmark-form input{width:100%;display:block;margin-top:7px}.bookmark-form>div{display:flex;gap:5px}
  mt-practice-assistant{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:23px 23px 13px;box-shadow:var(--shadow)}.assistant-heading{position:relative}.assistant-heading h2{font-size:16px;margin-top:4px}.tracking-scene{height:170px;position:relative;margin:15px 0 8px;display:flex;align-items:center;justify-content:center;background:radial-gradient(ellipse,var(--accent-soft),transparent 70%);isolation:isolate}.tracking-scene mt-tracking-avatar{width:170px;height:170px;margin-top:-12px;z-index:1}.tracking-label{position:absolute;bottom:0;left:0;right:0;display:flex;justify-content:center;align-items:center;gap:5px;font-size:8px;letter-spacing:.2px;color:var(--faint)}.status-dot{width:4px;height:4px;border-radius:50%;background:var(--faint)}.status-dot.live{background:var(--green);box-shadow:0 0 0 3px var(--accent-soft)}.assistant-intro{text-align:center;color:var(--muted);font-size:11px;line-height:1.8;margin:15px 0 17px}.assist-toggles{display:flex;gap:9px}.assist-toggle{min-height:44px;flex:1;display:flex;align-items:center;justify-content:space-between;gap:7px;padding:6px 0;border:0;border-radius:0;background:transparent;font-size:11px}.assist-toggle>mt-icon{color:var(--muted);font-size:13px}.switch-track{width:25px;height:14px;background:var(--border);border-radius:10px;position:relative;margin-left:auto}.switch-track:before{content:'';position:absolute;left:2px;top:2px;width:10px;height:10px;border-radius:50%;background:var(--surface);transition:transform .2s}.assist-toggle[aria-pressed=true] .switch-track{background:var(--accent-strong)}.assist-toggle[aria-pressed=true] .switch-track:before{transform:translateX(11px)}.assist-status{font-size:9px;line-height:1.5;color:var(--muted);text-align:center;margin-top:8px}.assist-status.error{color:var(--danger);text-align:left;padding:6px 0}.calibrate-button{font-size:10px;display:flex;width:100%;margin-top:5px}.voice-example{padding:17px 15px;border:1px solid var(--border);background:var(--surface-2);border-radius:9px;margin-top:19px;text-align:center}.voice-example>span{font-size:8px;letter-spacing:1.5px;color:var(--muted)}.voice-example p{font-family:Georgia,serif;font-size:21px;margin:4px 0;color:var(--text);letter-spacing:-.4px}.voice-example b{font-weight:400}.voice-example small{font-size:9px;color:var(--muted)}.gesture-legend{margin:19px 0 11px;display:grid;gap:11px}.gesture-legend>div{display:flex;align-items:center;gap:9px;font-size:9px;color:var(--muted)}.gesture-legend mt-icon{font-size:13px;color:var(--faint)}.assistant-settings{width:100%;border-top:1px solid var(--border);padding-top:12px;margin-top:3px;font-size:9px;justify-content:space-between}.assistant-settings mt-icon{width:12px}.practice-tip{display:flex;gap:15px;align-items:center;padding:18px 22px;border:1px solid var(--border);border-radius:12px;background:linear-gradient(110deg,var(--surface),var(--bg))}.tip-icon{width:39px;height:39px;display:flex;align-items:center;justify-content:center;background:var(--accent-soft);color:var(--accent-strong);border-radius:50%;font-size:18px}.practice-tip .eyebrow{font-size:8px}.practice-tip p{font-family:Georgia,serif;font-size:16px;line-height:1.5;margin-top:4px;color:var(--muted)}
  dialog{border:1px solid var(--border);padding:0;border-radius:16px;background:var(--surface);color:var(--text);box-shadow:0 24px 100px #0004;max-width:calc(100vw - 32px);max-height:calc(100dvh - 48px)}dialog::backdrop{background:#0b141b70;backdrop-filter:blur(5px)}.preferences-dialog{width:570px}.dialog-top{display:flex;align-items:center;justify-content:space-between;padding:23px 26px;border-bottom:1px solid var(--border);position:sticky;top:0;background:var(--surface);z-index:2}.dialog-top h2{font-size:22px;margin-top:3px}.settings-content{padding:0 26px 20px}.settings-content section{padding:24px 0;border-bottom:1px solid var(--border)}.settings-content section:last-child{border:0;padding-bottom:5px}.settings-content h3{font-size:14px;letter-spacing:-.1px}.settings-content p{font-size:12px;line-height:1.7;color:var(--muted);margin-top:7px}.theme-options{display:flex;gap:10px;margin-top:15px}.theme-option{flex:1;border:1px solid var(--border);padding:12px;display:flex;gap:8px;justify-content:center;align-items:center;border-radius:8px;font-size:12px;min-height:48px}.theme-option[aria-pressed=true]{border-color:var(--accent);background:var(--accent-soft);color:var(--accent-strong)}.prefix-form{display:flex;gap:10px;margin-top:15px}.prefix-form input{flex:1}.setting-note{font-size:10px!important;line-height:1.7!important}.delay-label{display:flex;justify-content:space-between;margin:16px 0 8px;font-size:12px}.eye-delay{width:100%;height:25px;margin:0}.eye-delay-value{font-variant-numeric:tabular-nums;color:var(--accent-strong)}.range-labels{display:flex;justify-content:space-between;font-size:10px;color:var(--faint)}.setting-toggle{display:flex;align-items:center;justify-content:space-between;gap:20px}.setting-toggle strong{display:block;font-size:14px;font-weight:550}.setting-toggle small{font-size:11px;color:var(--muted);display:block;margin-top:7px}.command-guide dl{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.4fr);gap:13px 20px;font-size:11px;margin:18px 0 24px}.command-guide dt{font-weight:550}.command-guide dd{margin:0;color:var(--muted)}.backup-buttons{display:flex;gap:10px;margin-top:15px}.library-dialog{width:650px}.library-explanation{padding:20px 26px 5px;color:var(--muted);font-size:12px}.library-items{padding:15px 26px;display:grid;gap:12px}.library-item{min-width:0;display:flex;align-items:center;gap:15px;border:1px solid var(--border);padding:15px;border-radius:10px}.library-video-icon{background:var(--accent-soft);color:var(--accent-strong);border-radius:8px;width:50px;height:55px;display:flex;align-items:center;justify-content:center;font-size:25px;flex-shrink:0}.library-reopen{text-align:left;flex:1;min-width:0;white-space:normal;overflow-wrap:anywhere}.library-reopen strong{display:block;font-size:14px;font-weight:500}.library-reopen small{display:block;font-size:10px;color:var(--muted);margin:4px 0;white-space:normal}.library-reopen>span{font-size:10px;color:var(--accent-strong);display:flex;align-items:center}.library-footer{padding:15px 26px 26px;display:flex;justify-content:space-between;gap:10px}.library-empty{text-align:center;padding:35px 20px;color:var(--muted)}.library-empty>mt-icon{font-size:40px;color:var(--faint)}.library-empty h3{font-size:17px;margin:15px 0 8px}.library-empty p{font-size:12px}.choice-dialog{padding:28px;width:460px}.choice-dialog h2{font-size:21px}.choice-dialog p{color:var(--muted);margin:12px 0 20px;font-size:13px}.choice-options{display:flex;flex-direction:column;gap:9px}.choice-options button{white-space:normal}.toast-region{position:fixed;bottom:24px;left:50%;transform:translateX(-50%);z-index:100;max-width:calc(100vw - 32px);width:max-content}.toast{display:flex;align-items:center;gap:10px;background:var(--text);color:var(--surface);padding:8px 10px 8px 17px;border-radius:10px;box-shadow:0 5px 30px #0003;font-size:12px;max-width:600px}.toast>mt-icon{color:var(--accent);flex-shrink:0}.toast>.icon-button{color:inherit}.toast-error>mt-icon{color:#e2a391}.tracking-capture{position:fixed;left:0;top:0;width:1px;height:1px;opacity:.001;pointer-events:none;z-index:-1}.player-card:fullscreen,.player-card.expanded-player{background:var(--surface);border-radius:0;display:flex;flex-direction:column;justify-content:center}.player-card:fullscreen mt-video-player,.player-card.expanded-player mt-video-player{flex:1;min-height:0;display:flex}.player-card:fullscreen .video-stage,.player-card.expanded-player .video-stage{flex:1;aspect-ratio:auto;min-height:0}.expanded-player{position:fixed;inset:0;z-index:90}.player-card:fullscreen .loop-hint{display:none}
}
@layer responsive {
  .video-stage{width:100%}
  .dialog-notice{position:sticky;bottom:0;background:var(--accent-soft);border-top:1px solid var(--border);color:var(--text);padding:12px 24px;font-size:12px;z-index:3}
  .is-practicing .app-header{height:68px}.is-practicing .workspace{padding-top:24px}.is-practicing .workspace-heading{margin-bottom:20px}.is-practicing .workspace-heading h1{font-size:27px}.is-practicing .workspace-heading p{display:none}.is-practicing .video-stage{aspect-ratio:auto;height:clamp(250px,calc(100dvh - 400px),540px);min-height:250px}
  @media(min-width:1500px){.workspace{padding-top:44px}.video-stage{min-height:410px}.player-empty h2{font-size:29px}.piano-art{transform:scale(1.12);margin-bottom:33px;margin-top:12px}}
  @media(max-width:1150px){.workspace-grid{grid-template-columns:minmax(0,1fr) 280px;gap:20px}.workspace{padding-left:30px;padding-right:30px}.app-header{padding:0 30px}.header-nav{margin-right:15px;gap:22px}.prototype-pill{display:none}.loop-hint{display:none}mt-practice-assistant{padding:20px 18px 12px}.video-stage{min-height:330px}.bookmark-list{grid-template-columns:1fr}.workspace-footer>span:nth-child(2){display:none}.transport-primary{gap:5px}.transport-secondary{gap:3px}.transport-primary .icon-button{width:36px}.bookmark-form{flex-direction:column;align-items:stretch}.bookmark-form>div{justify-content:flex-end}.player-empty h2{font-size:23px}}
  @media(max-width:900px){.app-header{height:72px;padding:0 25px}.workspace{padding:27px 25px 20px}.workspace-grid{grid-template-columns:minmax(0,1fr) 250px;gap:17px}.workspace-heading{margin-bottom:23px}h1{font-size:29px}.workspace-heading p{font-size:12px}.header-nav{gap:15px;margin-right:5px}.brand{font-size:23px}.header-tools{gap:0}.header-tools .icon-button{width:36px}mt-transport{padding:14px 14px 0}.transport-row{gap:5px}.transport-primary{gap:2px}.transport-primary .icon-button{width:30px}.transport-secondary .icon-button{width:29px}.transport-secondary .mute-button{display:none}.play-button{width:39px;height:39px}.loop-strip{gap:14px}.loop-points{gap:5px}.loop-toggle{font-size:10px}.loop-points button:not(.icon-button){font-size:9px}.player-topline{padding:13px 14px}.video-meta{display:none}.player-empty{padding:24px 12px}.player-empty h2{font-size:21px}.piano-art{width:225px;height:80px;margin-bottom:20px}.keyboard-art{height:48px}.stage-eyebrow{font-size:7px}.assistant-heading h2{font-size:15px}.gesture-legend>div{font-size:8px}.assist-toggle{gap:5px;font-size:10px}.switch-track{width:23px}.assist-toggle[aria-pressed=true] .switch-track:before{transform:translateX(9px)}.tracking-scene{height:155px}.tracking-scene mt-tracking-avatar{width:155px;height:155px}.voice-example{padding:14px 9px}.voice-example p{font-size:20px}.voice-example small{font-size:8px}.practice-tip{padding:15px}.bookmark-empty{padding:16px}.bookmark-empty h3{font-size:11px}.bookmark-empty p{font-size:10px}.bookmark-empty kbd{display:none}}
  @media(max-width:760px){.workspace-grid{grid-template-columns:1fr}.assistant-column{grid-template-columns:minmax(0,1fr);gap:15px}.practice-tip{display:none}.video-stage{min-height:350px}.transport-primary{gap:12px}.transport-secondary{gap:10px}.transport-primary .icon-button,.transport-secondary .icon-button{width:42px}.transport-secondary .mute-button{display:flex}.play-button{width:44px;height:44px}.loop-strip{gap:20px}.loop-toggle{font-size:11px}.loop-points button:not(.icon-button){font-size:11px}.loop-points{gap:10px}mt-practice-assistant{display:grid;grid-template-columns:1fr 1fr;gap:0 28px;padding:24px}.assistant-heading{grid-column:1}.tracking-scene{grid-column:1;grid-row:2/6;margin:15px 0;height:210px}.tracking-scene mt-tracking-avatar{width:195px;height:195px}.assistant-intro{grid-column:2;grid-row:1;text-align:left;margin:0 0 18px}.assist-toggles{grid-column:2;grid-row:2;align-self:start}.assist-status{grid-column:2}.voice-example{grid-column:2}.gesture-legend{grid-column:1/3;display:flex;flex-wrap:wrap;gap:16px;margin-top:22px}.gesture-legend>div{font-size:9px}.assistant-settings{grid-column:1/3}.calibrate-button{grid-column:1;grid-row:6}.assistant-column{margin-top:7px}.bookmark-list{grid-template-columns:repeat(2,minmax(0,1fr))}.header-nav{margin-left:auto;margin-right:8px}.header-nav .nav-current{display:none}.app-header{gap:10px}.nav-button{font-size:12px}.workspace-footer{margin-top:24px}.workspace-footer .text-button{font-size:10px}.workspace-heading{align-items:flex-start}.heading-open{align-self:center}.player-empty h2{font-size:26px}.piano-art{width:265px;height:91px}.keyboard-art{height:53px}}
  @media(max-width:480px){.app-header{padding:0 17px;height:68px}.brand{font-size:23px;gap:8px}.brand img{width:30px;height:30px;border-radius:8px}.header-nav{margin-right:0}.nav-button{font-size:0;gap:0}.nav-button mt-icon{font-size:17px}.header-tools .icon-button{width:32px}.workspace{padding:25px 16px 18px}.workspace-heading{gap:10px}h1{font-size:27px}.workspace-eyebrow{font-size:8px}.workspace-heading p{font-size:11px;max-width:220px}.heading-open{font-size:0;min-width:40px;padding:10px;gap:0}.heading-open mt-icon{font-size:18px}.video-stage{min-height:340px}.player-empty h2{font-size:23px}.transport-primary{gap:4px}.transport-primary .icon-button{width:31px}.transport-secondary{gap:2px}.transport-secondary .icon-button{width:30px}.transport-secondary .mute-button{display:none}.loop-strip{gap:15px;flex-wrap:wrap;padding:6px 0;min-height:60px}.loop-points{gap:6px}.loop-toggle{font-size:10px}.loop-points button:not(.icon-button){font-size:10px}.bookmark-list{grid-template-columns:1fr}.section-heading h2{font-size:15px}.bookmark-empty{gap:12px}.bookmark-empty p{max-width:210px}.workspace-footer{align-items:flex-start;font-size:10px;gap:10px}.workspace-footer .text-button{max-width:100px;text-align:right;font-size:9px;padding:0;min-height:0}mt-practice-assistant{padding:19px;gap:0 15px}.assistant-heading h2{font-size:14px}.assistant-intro{font-size:10px}.tracking-scene{height:180px}.tracking-scene mt-tracking-avatar{width:160px;height:160px}.tracking-caption{font-size:7px}.assist-toggles{flex-direction:column;gap:6px}.assist-toggle{min-height:38px;font-size:10px;gap:6px}.voice-example{margin-top:12px;padding:11px 6px}.voice-example p{font-size:18px}.voice-example small{font-size:7px}.gesture-legend{gap:10px}.gesture-legend>div{font-size:9px}.preferences-dialog,.library-dialog{max-height:calc(100dvh - 24px)}.dialog-top{padding:18px 20px}.settings-content{padding:0 20px 15px}.dialog-top h2{font-size:20px}.theme-option{padding:10px}.command-guide dl{font-size:10px;gap:13px}.library-footer{flex-direction:column}.library-items{padding:15px}.library-item{gap:10px;padding:11px}.library-video-icon{width:35px;height:45px;font-size:20px}.library-explanation{padding:17px 20px 0}.toast{font-size:11px;gap:7px;padding-left:12px}}
  @media(pointer:coarse){.icon-button.small{min-width:40px;min-height:44px}.scrub-wrap{height:32px}.scrub-wrap input{height:5px}.scrub-wrap input::-webkit-slider-thumb{width:15px;height:15px}.loop-points button:not(.icon-button){min-height:44px}.timeline-markers i{top:6px;height:20px}.loop-region{top:11px}.theme-option,.button,.icon-button{min-height:44px}.gesture-legend>div{font-size:10px}}
  @media(max-width:900px){.workspace-grid{grid-template-columns:1fr}.assistant-column{margin-top:7px}.practice-tip{display:none}.is-practicing .video-stage{height:auto;min-height:0;aspect-ratio:16/9}.bookmark-list{grid-template-columns:repeat(2,minmax(0,1fr))}}
  @media(min-width:761px) and (max-width:900px){mt-practice-assistant{display:grid;grid-template-columns:1fr 1fr;gap:0 28px;padding:24px}.assistant-heading{grid-column:1}.tracking-scene{grid-column:1;grid-row:2/6;height:210px}.tracking-scene mt-tracking-avatar{width:195px;height:195px}.assistant-intro{grid-column:2;grid-row:1;text-align:left}.assist-toggles,.assist-status,.voice-example{grid-column:2}.gesture-legend,.assistant-settings{grid-column:1/3}.gesture-legend{display:flex;gap:16px}.calibrate-button{grid-column:1;grid-row:6}.video-stage{min-height:350px}}
  @media(max-width:480px){.bookmark-list{grid-template-columns:1fr}}
  @media(prefers-reduced-motion:reduce){*,*::before,*::after{animation-duration:.001ms!important;transition:none!important;scroll-behavior:auto!important}}
}

@layer responsive {
  .player-card{position:relative}
  .tracking-scene{height:195px;margin:12px 0 14px}
  .tracking-scene mt-tracking-avatar{width:200px;height:190px}
  .tracking-label{bottom:0}
  .tracking-caption{font-size:9px;letter-spacing:0}
  .assistant-heading h2{margin:0}
  .fullscreen-indicator{display:none;pointer-events:auto}
  .player-card:is(:fullscreen,.expanded-player){background:#101311;justify-content:flex-start}
  .player-card:is(:fullscreen,.expanded-player) .player-topline{display:none}
  .player-card:is(:fullscreen,.expanded-player) .video-stage{height:auto;min-height:0;aspect-ratio:auto;flex:1}
  .player-card:is(:fullscreen,.expanded-player) mt-video-player{flex:1;min-height:0}
  .player-card:is(:fullscreen,.expanded-player) mt-transport{flex:none;background:var(--surface);padding-bottom:4px}
  .fullscreen-indicator{position:absolute;right:18px;top:18px;width:108px;height:103px;background:#202720bb;backdrop-filter:blur(10px);border:1px solid #ffffff12;border-radius:20px;z-index:4;--accent-strong:#9ac3a1;--text:#e7e9e1;--green:#a2bca8}.player-card:is(:fullscreen,.expanded-player) .fullscreen-indicator{display:block}
  .player-card:is(:fullscreen,.expanded-player) .loop-hint{display:none}
  .skip-button mt-icon{width:25px;height:25px}
  @media(max-width:900px){
    mt-practice-assistant{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:0 24px}
    .assistant-heading{grid-column:1;grid-row:1}
    .assist-toggles{grid-column:2;grid-row:1;align-self:center}
    .tracking-scene{grid-column:1;grid-row:2/6;height:195px;margin:10px 0}
    .tracking-scene mt-tracking-avatar{width:190px;height:185px}
    .voice-status,.camera-status,.voice-example{grid-column:2;grid-row:auto}
    .voice-example{align-self:center;margin-top:14px}
    .calibrate-button{grid-column:1;grid-row:6}
    .gesture-legend,.assistant-settings{grid-column:1/3}
  }
  @media(max-width:480px){
    mt-practice-assistant{gap:0 12px}
    .tracking-scene{height:168px}.tracking-scene mt-tracking-avatar{width:155px;height:160px}
    .tracking-caption{font-size:8px}.assistant-heading h2{font-size:13px}
    .player-card:is(:fullscreen,.expanded-player) .fullscreen-indicator{right:10px;top:10px;width:90px;height:86px;border-radius:16px}
  }
}

@layer components {
  .voice-feedback{position:fixed;inset:0;z-index:150;pointer-events:none;border-radius:12px;opacity:0;transition:opacity .18s ease;--voice-edge:var(--green);box-shadow:inset 0 0 0 3px var(--voice-edge),inset 0 0 24px color-mix(in srgb,var(--voice-edge) 18%,transparent)}
  .voice-feedback[data-phase=listening],.voice-feedback[data-phase=unrecognized]{opacity:1}
  .voice-feedback[data-phase=unrecognized]{--voice-edge:var(--danger)}
  .voice-feedback-label{position:absolute;bottom:18px;left:50%;transform:translateX(-50%);display:flex;align-items:center;gap:8px;padding:7px 12px;border:1px solid color-mix(in srgb,var(--voice-edge) 40%,var(--border));border-radius:20px;background:var(--surface);box-shadow:0 3px 16px #0000000c;color:var(--text);font-size:11px;white-space:nowrap}
  .player-card:is(:fullscreen,.expanded-player) .voice-feedback-label{top:14px;bottom:auto}
  .voice-feedback-label:empty{display:none}
  .voice-feedback-label::before{content:'';width:6px;height:6px;flex:none;background:var(--voice-edge);border-radius:50%}
}

@layer components {
  .action-feedback{position:fixed;inset:0;z-index:149;pointer-events:none;border-radius:12px;opacity:0;--action-edge:var(--green);box-shadow:inset 0 0 0 3px var(--action-edge),inset 0 0 28px color-mix(in srgb,var(--action-edge) 18%,transparent)}
  .action-feedback[data-error=true]{--action-edge:var(--danger)}
  .detected-control{outline:2px solid var(--green)!important;outline-offset:3px;box-shadow:0 0 0 5px color-mix(in srgb,var(--green) 14%,transparent)!important}
  .player-card:is(:fullscreen,.expanded-player) .toast-region{bottom:170px;z-index:160}
  .voice-feedback-label{bottom:80px}
}

@layer responsive {
  .tracking-scene .tracking-label{width:max-content;max-width:100%;left:50%;right:auto;transform:translateX(-50%);letter-spacing:0;z-index:2}
  .fullscreen-indicator mt-gesture-status{position:absolute;left:3px;right:3px;bottom:4px}
  .fullscreen-indicator:has(mt-gesture-status:not([hidden])){height:132px!important}
  .fullscreen-indicator:has(mt-gesture-status:not([hidden])) mt-tracking-avatar{height:103px}
  @media(max-width:480px){.fullscreen-indicator:has(mt-gesture-status:not([hidden])){height:116px!important}.fullscreen-indicator:has(mt-gesture-status:not([hidden])) mt-tracking-avatar{height:86px}}
}

mt-bookmark-editor{display:contents}.bookmark-dialog{width:420px}.bookmark-name-form{padding:24px}.bookmark-dialog-heading{display:flex;justify-content:space-between;align-items:flex-start;gap:16px;margin-bottom:22px}.bookmark-dialog h2{font-size:21px}.bookmark-editor-time{font-size:12px;color:var(--muted);margin-top:7px;font-variant-numeric:tabular-nums}.bookmark-name-form>label{display:block;font-size:12px;margin-bottom:8px;color:var(--muted)}.bookmark-name-form>input{width:100%}.bookmark-dialog-actions{display:flex;justify-content:flex-end;gap:8px;margin-top:24px}
.transport-row{flex-wrap:wrap}.transport-bookmarks{display:flex;gap:2px;align-items:center}.transport-bookmarks .icon-button{width:32px}.transport-secondary{margin-left:auto}.scrub-wrap{height:42px}.timeline-markers{z-index:3}.timeline-marker{position:absolute;top:-3px;transform:translateX(-50%);width:30px;height:28px;display:flex;align-items:center;justify-content:center;pointer-events:auto;color:var(--muted);border-radius:5px;background:transparent}.timeline-marker mt-icon{width:12px;height:16px;pointer-events:none}.timeline-marker::after{content:'';position:absolute;bottom:-3px;height:8px;width:2px;background:currentColor}.timeline-marker:is(:hover,:active,:focus-visible,.is-current,.can-play,.is-dragging){color:var(--accent-strong);background:transparent;--icon-fill:currentColor}.timeline-marker:focus-visible{outline:none}.loop-region{top:16px}
@media(min-width:761px) and (max-width:1150px){.transport-primary{flex-basis:100%;justify-content:center}.transport-bookmarks .icon-button{width:36px}}
@media(max-width:600px){.transport-primary{flex-basis:100%;justify-content:center;gap:14px}.transport-row{row-gap:10px}.transport-bookmarks .icon-button{width:36px}.transport-secondary{gap:4px}.transport-secondary .icon-button{width:30px}}
@media(pointer:coarse){.scrub-wrap{height:48px}.timeline-marker{width:36px;height:34px;top:-4px}.loop-region{top:19px}}

.transport-bookmarks{gap:5px}.transport-bookmarks .icon-button{width:38px}.transport-bookmarks mt-icon{width:28px;height:22px}

.timeline-marker.can-play{color:var(--accent-strong)}.timeline-marker.can-play mt-icon{width:18px;height:18px}.bookmark-item.can-play .bookmark-jump>mt-icon{width:25px;height:25px;padding:5px;border-radius:50%;background:var(--accent);color:var(--accent-ink)}

.transport-bookmarks [data-command="bookmark"]{margin-left:7px}.transport-bookmarks .is-undo{background:var(--accent-soft);color:var(--accent-strong)}.transport-bookmarks .is-undo mt-icon{width:22px}

/* Raised marker tabs keep their touch targets clear of the seek thumb. */
.scrub-wrap{height:66px;align-items:flex-end;padding-bottom:10px}.timeline-marker{top:0;width:44px;height:44px;touch-action:manipulation}.timeline-marker mt-icon{width:18px;height:23px}.timeline-marker::after{bottom:-15px;height:20px;width:3px;pointer-events:none;border-radius:2px}.timeline-marker.can-play mt-icon{width:23px;height:23px}.loop-region{top:auto;bottom:7px}.transport-primary{gap:7px}.transport-primary [data-command="previous"],.transport-primary [data-command="next"]{width:38px}.transport-primary [data-command="previous"] mt-icon,.transport-primary [data-command="next"] mt-icon{width:28px;height:22px}
@media(max-width:600px){.transport-primary{gap:5px}.transport-primary .icon-button{width:36px}}
@media(any-pointer:coarse){.scrub-wrap{height:78px;padding-bottom:12px}.timeline-marker{width:48px;height:48px}.timeline-marker mt-icon{width:20px;height:26px}.timeline-marker::after{bottom:-20px;height:27px;width:4px}.timeline-marker.can-play mt-icon{width:26px;height:26px}.loop-region{bottom:9px}}

.timeline-marker::after{background:var(--accent-strong)}

/* Loop points sit below the track, clear of bookmarks at the same timestamp. */
.scrub-wrap{--loop-color:color-mix(in srgb,var(--green) 70%,var(--text));--loop-fill:color-mix(in srgb,var(--green) 38%,var(--surface));--loop-handle-fill:color-mix(in srgb,var(--green) 24%,var(--surface));--loop-handle-ink:color-mix(in srgb,var(--green) 25%,var(--text))}
.scrub-wrap.has-loop-markers{--track-bottom:52px;height:108px;padding-bottom:var(--track-bottom)}
.loop-region{top:auto;bottom:calc(var(--track-bottom,10px) - 9px);height:22px;padding:0;background:var(--loop-fill);border:1px solid var(--loop-color);border-radius:5px;pointer-events:auto;cursor:pointer;z-index:1}
.loop-region:hover{background:color-mix(in srgb,var(--loop-color) 50%,var(--surface))}
.loop-markers{position:absolute;inset:0;pointer-events:none;z-index:3}
.loop-marker{position:absolute;top:calc(100% - var(--track-bottom) + 6px);transform:translateX(-50%);width:44px;height:44px;display:flex;align-items:center;justify-content:center;padding:0;pointer-events:auto;color:var(--loop-color);border:0;border-radius:7px}
.loop-marker span{display:flex;align-items:center;justify-content:center;width:23px;height:23px;border:1px solid color-mix(in srgb,var(--loop-color) 45%,var(--surface));border-radius:5px;background:var(--loop-handle-fill);color:var(--loop-handle-ink);font-size:11px;font-weight:700;pointer-events:none}
.loop-marker:is(:hover,:active,:focus-visible,.is-dragging) span{background:var(--loop-color);border-color:var(--loop-color);color:var(--surface)}
.loop-marker:focus-visible{outline:none}
.timeline-marker,.loop-marker{touch-action:none;user-select:none;cursor:pointer}
.timeline-marker.is-dragging,.loop-marker.is-dragging{z-index:5}

.timeline-drag-time{position:absolute;right:0;top:0;padding:3px 7px;border-radius:5px;background:var(--text);color:var(--surface);font-size:11px;pointer-events:none;z-index:6}
.loop-strip{flex-wrap:wrap;column-gap:17px}
.bookmark-loop-toggle{margin-left:auto;min-height:44px;padding:0;font-size:11px;color:var(--muted);text-decoration:underline;text-underline-offset:3px}
.bookmark-loop-toggle:hover,.bookmark-loop-toggle[aria-pressed=true]{color:var(--accent-strong)}
.bookmark-loop-toggle[aria-pressed=true]{font-weight:600}
.loop-region.is-bookmark-loop{background:color-mix(in srgb,var(--accent) 38%,var(--surface));border-color:var(--accent-strong)}
@media(max-width:480px){.bookmark-loop-toggle{margin-left:0;flex-basis:100%;text-align:left;min-height:36px}}
@media(any-pointer:coarse){.scrub-wrap.has-loop-markers{--track-bottom:56px;height:124px}.loop-region{height:26px;bottom:calc(var(--track-bottom,12px) - 11px)}.loop-marker{width:48px;height:48px;top:calc(100% - var(--track-bottom) + 8px)}.loop-marker span{width:26px;height:26px;font-size:12px}}

@layer responsive {
  @media(max-width:900px){
    .assistant-column{display:none}
    .fullscreen-indicator{display:block;right:12px;top:67px}
    .player-card:is(:fullscreen,.expanded-player) .fullscreen-indicator{top:18px}
  }
  @media(max-width:480px){
    .fullscreen-indicator{right:10px;width:90px;height:86px;border-radius:16px}
    .player-card:is(:fullscreen,.expanded-player) .fullscreen-indicator{top:10px}
  }
}

/* The bookmark SVGs use a wider viewBox; give them room without shrinking their height. */
.transport-primary [data-command="previous"],.transport-primary [data-command="next"],.transport-bookmarks .icon-button{width:48px;min-width:48px;padding-inline:6px}
.transport-primary [data-command="previous"] mt-icon,.transport-primary [data-command="next"] mt-icon,.transport-bookmarks mt-icon{width:36px;height:27px}
.transport-bookmarks .is-undo mt-icon{width:24px;height:24px}
@media(max-width:360px){.transport-primary{gap:2px}.transport-primary .icon-button:not([data-command="previous"]):not([data-command="next"]){width:30px}.transport-primary .play-button{width:40px;height:40px}}