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#666c80;--m-text: #eef0f5;--m-text-muted: #a5aab8;--m-shadow: 0 6px 20px rgb(0 0 0 / .35);color-scheme:dark}:root{--track-melody: #0072b2;--track-counter: #d55e00;--track-chords: #c77f00;--track-bass: #009e73;--track-drums: #cc79a7;--track-percussion: #cc79a7;--track-pad: #56b4e9;--track-other: #6b6457}[data-music]{--bg: var(--m-bg);--surface: var(--canvas);--surface-2: var(--m-surface-2);--surface-3: var(--m-surface-3);--border: var(--m-border);--border-strong: var(--m-border-strong);--text: var(--m-text);--text-muted: var(--m-text-muted);--action: var(--transport);--action-text: var(--transport-text);--accent2: var(--transport);--chrome: var(--m-surface);--nav-icon: var(--m-text-muted);--done-accent: var(--transport);--focus: var(--m-text);--shadow: var(--m-shadow);--r-card: 16px;--r-hero: 24px;--r-btn: 999px;--r-chip: 999px;--r-input: 12px;--border-w: 1px;--fs-base: 16px;--fs-lesson: 18px;--lh-lesson: 28px;--lh-lesson-fa: 32px;--fs-display: 32px;--lh-display: 40px;--lh-display-fa: 48px;--head-weight: 700;--icon-stroke: 1.75;--caption-min: 12.5px}:where([data-music]){color:var(--text);font-size:var(--fs-base)}:root{--touch: 44px;--font: "CA Sans", system-ui, -apple-system, "Segoe UI", Roboto, Tahoma, sans-serif}*{box-sizing:border-box}html,body,#root{margin:0;height:100%}body{background:var(--bg-pattern),var(--bg);background-color:var(--bg);color:var(--text);font-family:var(--font);font-size:var(--fs-base);line-height:1.45;-webkit-tap-highlight-color:transparent;overscroll-behavior:none}html[lang=fa] body{line-height:1.7}button{font:inherit;color:inherit}h1,h2,h3{font-weight:var(--head-weight)}button,.rgrid,.toolbar,.transport,.track-chips{touch-action:manipulation}.link-btn{border:none;background:transparent;color:var(--text);text-decoration:underline;text-underline-offset:3px;font-weight:600;min-height:var(--touch);padding:0 8px;cursor:pointer;white-space:nowrap}.link-btn:has(>.nav-chevron){display:inline-flex;align-items:center;gap:4px}:focus-visible{outline:3px solid var(--focus);outline-offset:2px}@media (prefers-reduced-motion: reduce){*{animation:none!important;transition:none!important}}[data-starting]{box-shadow:0 0 0 4px color-mix(in srgb,var(--now) 45%,transparent);animation:starting-pulse 1.1s ease-in-out infinite}@keyframes starting-pulse{0%,to{box-shadow:0 0 0 2px color-mix(in srgb,var(--now) 25%,transparent)}50%{box-shadow:0 0 0 7px color-mix(in srgb,var(--now) 50%,transparent)}}[dir=rtl] .flip-rtl{display:inline-block;transform:scaleX(-1)}.ca-icon{flex:none;stroke-width:var(--icon-stroke)}.muted{color:var(--text-muted)}.privacy-line{font-size:max(13px,var(--caption-min));margin:12px 0 0}.error{color:var(--danger);font-weight:600}.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;min-height:var(--touch);padding:0 18px;border-radius:var(--r-btn);border:var(--border-w) solid var(--border);background:var(--surface);cursor:pointer;font-weight:600}.btn.primary{background:var(--action);color:var(--action-text);border-color:var(--action)}.btn:disabled{cursor:not-allowed;opacity:.45}.btn.primary:disabled{background:var(--surface-2);color:var(--text-muted);border-color:var(--border);opacity:1}.btn.small{min-height:var(--touch);padding:0 14px;font-size:14px}.icon-btn{min-width:var(--touch);min-height:var(--touch);border:none;background:transparent;border-radius:12px;cursor:pointer;font-size:20px;display:inline-flex;flex-direction:column;align-items:center;justify-content:center;gap:0}.icon-btn:disabled{opacity:.35;cursor:default}.icon-btn.small{min-width:var(--touch);min-height:var(--touch);font-size:16px}.icon-btn.labeled small{font-size:max(11px,var(--caption-min));line-height:1.1}.icon-btn.active{background:var(--action);color:var(--action-text)}.chip{min-height:var(--touch);padding:0 14px;border-radius:var(--r-chip);border:var(--border-w) solid var(--border);background:var(--surface);cursor:pointer;white-space:nowrap;font-size:15px}.chip.active{background:var(--action);color:var(--action-text);border-color:var(--action)}.chip.danger{color:var(--danger);border-color:var(--danger)}.chip:disabled{opacity:.6}.seg{display:inline-flex;border:var(--border-w) solid var(--border-strong);border-radius:var(--r-chip);overflow:hidden;background:var(--surface);flex:none}.seg-btn{min-height:var(--touch);min-width:var(--touch);padding:0 12px;border:none;background:transparent;cursor:pointer;white-space:nowrap;font-size:15px}.seg-btn+.seg-btn{border-inline-start:1px solid var(--border)}[data-music] .seg{border-color:var(--border)}[data-music] .icon-btn.labeled small{font-size:11px}.seg-btn.active{background:var(--action);color:var(--action-text);font-weight:700}.home{max-width:920px;margin:0 auto;padding:12px 16px calc(24px + env(safe-area-inset-bottom))}.home-top{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;column-gap:8px}.brand{display:flex;align-items:center;gap:10px;font-size:20px;margin:8px 0}.home-actions{display:flex;flex-wrap:wrap;align-items:center;justify-content:flex-end;gap:6px;min-width:0;margin-inline-start:auto}.home-actions .account-menu .btn{white-space:nowrap}.lang-switch .seg-btn{min-height:var(--touch);min-width:44px;padding:0 10px}.style-card-wrap{display:grid;grid-template-rows:1fr auto}.link-btn.continue{justify-self:start;font-size:14px}.piece-text{display:grid;text-align:start}.piece-title{font-weight:600}.piece-when{font-size:max(13px,var(--caption-min))}@media (pointer: coarse) and (max-width: 600px){.connect-btn{display:none}}.hero h2{font-size:26px;margin:18px 0 4px}.style-cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:12px;margin-top:16px}.style-card{position:relative;display:grid;grid-template-columns:auto 1fr 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strong{text-decoration:underline;text-underline-offset:3px}.play-btn.small{width:44px;height:44px;font-size:16px}.piece-thumb{position:relative;height:84px;border-radius:10px;overflow:hidden;background:var(--surface-2)}.piece-thumb span{position:absolute;height:9px;border-radius:3px}.on-card{background:var(--surface);border:var(--border-w) solid var(--border);border-radius:var(--r-card);padding:14px 18px}.empty-with-art{display:flex;align-items:center;flex-wrap:wrap;gap:14px 18px}.empty-with-art>.empty-text{flex:1 1 220px;min-width:0}.guest-banner{display:flex;align-items:center;gap:12px 16px;flex-wrap:wrap;padding:14px 18px;border-radius:var(--r-card);background:var(--surface);border:var(--border-w) dashed var(--border-strong)}.guest-banner p{margin:0;flex:1 1 280px}.guest-banner .actions{display:flex;gap:8px;flex-wrap:wrap}.skeleton{border-radius:var(--r-hero);background:var(--surface);border:var(--border-w) solid var(--border);min-height:220px;display:grid;place-items:center;color:var(--text-muted)}.unit-done{display:flex;flex-direction:column;gap:12px;padding:24px;border-radius:var(--r-hero);background:var(--surface);border:var(--border-w) solid var(--border)}.unit-done h2{margin:0;font-size:20px}.unit-done p{margin:0}.unit-done a.link-btn{display:inline-flex;align-items:center;gap:6px;min-height:44px}.unit-done-star{color:var(--star-ink);font-weight:700}.unit-done-pieces{display:flex;flex-wrap:wrap;gap:8px 16px;list-style:none;margin:0;padding:0}.unit-done-pieces li,.unit-done-project{display:flex;align-items:center;gap:8px}.first{min-height:100%;display:flex;flex-direction:column}.first-top{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:20px 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p{margin:0;max-width:640px}.first-sub{font-size:18px;color:var(--text-muted)}.first-which{font-weight:700;font-size:18px}.first-note{font-size:max(14px,var(--caption-min))}.style-pick{display:flex;gap:16px;flex-wrap:wrap;justify-content:center}.style-pick-card{display:flex;align-items:center;gap:14px;width:280px;min-height:88px;padding:16px 18px;border-radius:var(--r-card);color:var(--text);background:var(--bg);border:var(--border-w) solid var(--border);text-align:start;cursor:pointer;font:inherit}.style-pick-card[aria-pressed=true]{border:2px solid var(--action);box-shadow:var(--shadow)}.style-pick-play{flex:none;width:48px;height:48px;border-radius:50%;display:inline-grid;place-items:center;background:var(--surface-2);color:var(--text)}.style-pick-card[aria-pressed=true] .style-pick-play{background:var(--action);color:var(--action-text)}.style-pick-text{display:flex;flex-direction:column;gap:2px}.style-pick-text strong{font-size:17px}.style-pick-text .muted{font-size:max(14px,var(--caption-min))}.first-start{display:flex;flex-direction:column;align-items:center;gap:8px}.first-start .btn.primary{min-height:60px;padding:0 40px;font-size:19px;font-weight:700;box-shadow:var(--shadow)}.first-foot{display:flex;justify-content:space-between;align-items:center;gap:12px 24px;flex-wrap:wrap;padding:16px 48px;border-top:var(--border-w) solid var(--border);background:var(--surface)}.first-foot .privacy-line{margin:0;flex:1 1 320px}.first-prefs{display:flex;align-items:center;gap:12px;flex-wrap:wrap}.swatches{display:flex;gap:8px}.swatch{width:44px;height:44px;min-width:44px;border-radius:50%;padding:0;border:1px solid var(--border-strong);cursor:pointer}.swatch[aria-checked=true]{border:3px solid var(--text)}@media (max-width: 699px){.first-top,.first-main,.first-foot{padding-inline:16px}.first-main{gap:18px;padding:8px 12px 24px}.first-body{gap:12px}.first-top{padding-block:10px}.first-signin 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.btn.primary{width:100%}.first-foot{padding-bottom:140px}}.music-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:16px;list-style:none;margin:0;padding:0}.piece-more{flex:none}.music-shelf{margin-top:24px}.music-shelf>h2{font-size:1.25rem;margin:0 0 12px}.music-unit{margin-bottom:12px}.music-unit>summary{cursor:pointer;min-height:var(--touch);display:flex;align-items:center;gap:8px}.music-unit>summary::-webkit-details-marker{display:none}.music-unit>summary:before{content:"▸";color:var(--text-muted);width:1em}[dir=rtl] .music-unit>summary:before{content:"◂"}.music-unit[open]>summary:before{content:"▾"}.music-unit>summary h3{display:inline;font-size:1.0625rem;margin:0}.music-unit[open]>summary{margin-bottom:8px}.piece-versions{align-self:flex-start;margin-top:4px;min-height:var(--touch)}.today-latest-row{display:flex;align-items:center;gap:8px 12px;flex-wrap:wrap}.today-latest-row 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