@font-face{font-family:Noto Music;src:url(/fonts/NotoMusic-Regular.ttf) format("truetype");font-weight:400;font-style:normal;font-display:swap}:root{--bg: #0b0c0f;--bg-soft: #101217;--panel: #14171d;--panel-2: #191c23;--panel-3: #1e222a;--line: rgba(240, 236, 228, .09);--line-strong: rgba(240, 236, 228, .18);--text: #f0ece4;--muted: #a09c93;--faint: #706d67;--accent: #e8b568;--accent-bright: #f3c983;--accent-soft: rgba(232, 181, 104, .12);--accent-line: rgba(232, 181, 104, .32);--green: #8fca9b;--green-soft: rgba(143, 202, 155, .13);--red: #e8836f;--red-soft: rgba(232, 131, 111, .13);--blue: #8fb8e8;--lilac: #b8a3e8;--teal: #79c7b8;--serif: "Iowan Old Style", "Palatino Linotype", Palatino, "Book Antiqua", Georgia, serif;--sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;--radius: 18px;--radius-lg: 26px;--sidebar: 256px;--shadow: 0 24px 60px rgba(0, 0, 0, .32);color-scheme:dark}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;min-height:100vh;background:radial-gradient(1200px 700px at 90% -10%,rgba(232,181,104,.07),transparent 60%),radial-gradient(900px 600px at 0% 100%,rgba(121,199,184,.045),transparent 60%),var(--bg);color:var(--text);font-family:var(--sans);font-size:15.5px;line-height:1.65;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}::selection{background:#e8b56847;color:#fff}a{color:inherit;text-decoration:none}button,input,select,textarea{font:inherit;color:inherit}button{cursor:pointer}button:disabled{cursor:default}h1,h2,h3,h4,p{margin:0}h1,h2,h3{font-family:var(--serif);font-weight:400;letter-spacing:-.015em;line-height:1.12}h1{font-size:clamp(38px,4.4vw,58px)}h2{font-size:clamp(24px,2.4vw,31px)}h3{font-size:20px}strong{font-weight:650}:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:6px}.install-prompt{position:fixed;left:0;right:0;bottom:26px;margin:0 auto;z-index:55;display:flex;align-items:flex-start;gap:13px;width:min(380px,calc(100vw - 40px));padding:16px;border:1px solid var(--line-strong);border-radius:16px;background:#14171df7;box-shadow:var(--shadow);backdrop-filter:blur(18px);animation:install-prompt-in .4s cubic-bezier(.22,.8,.24,1) both}@keyframes install-prompt-in{0%{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}.install-prompt-icon{display:grid;place-items:center;flex-shrink:0;width:38px;height:38px;border:1px solid var(--accent-line);border-radius:12px;background:var(--accent-soft);color:var(--accent)}.install-prompt-copy{display:flex;flex:1;flex-direction:column;gap:4px;min-width:0}.install-prompt-copy strong{font-size:13px}.install-prompt-copy p{font-size:11px;line-height:1.5;color:var(--muted)}.install-prompt-copy b{color:var(--text);font-weight:600}.install-prompt-actions{display:flex;flex-wrap:wrap;gap:6px;margin-top:8px}.install-prompt-actions .button{padding:7px 12px;font-size:11.5px}.install-prompt-close{flex-shrink:0;border:none;border-radius:6px;background:transparent;padding:3px;color:var(--faint)}.install-prompt-close:hover{color:var(--text);background:#ffffff0d}@media(max-width:1080px){.install-prompt{left:12px;right:12px;bottom:calc(76px + env(safe-area-inset-bottom));margin:0;width:auto}body.has-install-prompt .metronome-dock{bottom:calc(272px + env(safe-area-inset-bottom))}}@media(prefers-reduced-motion:reduce){.install-prompt{animation:none}}.update-prompt{position:fixed;top:16px;left:0;right:0;z-index:90;display:flex;align-items:center;gap:12px;width:min(560px,calc(100vw - 32px));margin:0 auto;padding:11px 12px;border:1px solid var(--accent-line);border-radius:14px;background:#14171dfa;box-shadow:0 18px 44px #00000073;backdrop-filter:blur(18px);animation:update-prompt-in .3s cubic-bezier(.22,.8,.24,1) both}@keyframes update-prompt-in{0%{opacity:0;transform:translateY(-12px)}to{opacity:1;transform:none}}.update-prompt-icon{display:grid;place-items:center;flex-shrink:0;width:34px;height:34px;border:1px solid var(--accent-line);border-radius:10px;background:var(--accent-soft);color:var(--accent)}.update-prompt-copy{display:grid;flex:1;gap:1px;min-width:0}.update-prompt-copy strong{font-size:12.5px}.update-prompt-copy p{color:var(--muted);font-size:11.5px;line-height:1.45}.update-prompt-action{flex-shrink:0;white-space:nowrap}.update-prompt-close{flex-shrink:0;display:grid;place-items:center;width:26px;height:26px;border:none;border-radius:7px;background:transparent;color:var(--faint)}.update-prompt-close:hover{background:#ffffff0d;color:var(--text)}@media(max-width:560px){.update-prompt{top:10px;gap:9px;padding:9px 10px}.update-prompt-copy p{display:none}.update-prompt-action{padding:8px 10px}}@media(prefers-reduced-motion:reduce){.update-prompt{animation:none}}.app-shell{min-height:100vh}.sidebar{position:fixed;inset:0 auto 0 0;width:var(--sidebar);display:flex;flex-direction:column;gap:28px;padding:26px 20px 22px;background:linear-gradient(180deg,#13151af5,#0b0c0ffa);border-right:1px solid var(--line);overflow-y:auto;scrollbar-width:thin;z-index:40}.brand{display:flex;align-items:center;gap:12px;padding:4px 6px}.brand-mark{display:grid;place-items:center;width:42px;height:42px;border-radius:13px;color:#17120a;background:linear-gradient(140deg,var(--accent-bright),var(--accent) 55%,#b9863f);box-shadow:0 6px 22px #e8b56838,inset 0 1px #fff6;flex-shrink:0}.brand-copy{display:flex;flex-direction:column;line-height:1.15}.brand-copy strong{font-family:var(--serif);font-size:22px;font-weight:400;letter-spacing:.01em}.brand-copy small{font-size:10.5px;color:var(--faint);letter-spacing:.04em}.side-nav{display:flex;flex-direction:column;gap:4px}.side-link{display:flex;align-items:center;gap:12px;padding:11px 13px;border-radius:12px;color:var(--muted);font-size:14px;font-weight:550;transition:background .18s,color .18s,transform .18s}.side-link:hover{background:#ffffff0a;color:var(--text)}.side-link.active{background:var(--accent-soft);color:var(--accent-bright)}.side-link.active svg{color:var(--accent)}.nav-badge{margin-left:auto;min-width:21px;height:21px;padding:0 6px;display:grid;place-items:center;border-radius:999px;background:var(--accent);color:#191307;font-size:11px;font-weight:750}.sidebar-foot{margin-top:auto;display:flex;flex-direction:column;gap:14px}.sidebar-language{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:0 2px}.sidebar-language-label{font-size:10px;font-weight:600;letter-spacing:.1em;text-transform:uppercase;color:var(--faint)}html.lang-fa .sidebar-language-label{font-size:11px;letter-spacing:0;text-transform:none}.language-toggle{display:inline-flex;align-items:center;gap:7px;border:1px solid var(--line);background:#ffffff06;color:var(--muted);border-radius:999px;padding:6px 11px;font:inherit;font-size:11px;font-weight:600;cursor:pointer;transition:color .16s,border-color .16s,background .16s}.language-toggle:hover{color:var(--text);border-color:var(--accent-line);background:var(--accent-soft)}.language-toggle:focus-visible{outline:2px solid var(--accent);outline-offset:2px}.language-toggle svg{margin:0;flex:none;color:var(--accent)}.language-toggle-label{display:inline-block;line-height:1}.language-toggle-label:lang(fa){font-family:Vazirmatn,Tahoma,sans-serif;font-size:12px}.language-toggle.compact{gap:4px;padding:4px 9px;font-size:10.5px;background:transparent}.language-modal-backdrop{position:fixed;inset:0;z-index:120;display:grid;place-items:center;padding:20px;background:#06070ac7;backdrop-filter:blur(14px);animation:language-modal-fade .25s ease both}.language-modal{width:min(440px,100%);max-height:calc(100dvh - 40px);overflow-y:auto;padding:30px;border:1px solid var(--line-strong);border-radius:24px;background:linear-gradient(180deg,#181b22fa,#0d0f14fc);box-shadow:var(--shadow);animation:language-modal-in .35s cubic-bezier(.22,.8,.24,1) both}.language-modal-mark{display:grid;place-items:center;width:48px;height:48px;margin-bottom:16px;border:1px solid var(--accent-line);border-radius:14px;background:var(--accent-soft);color:var(--accent)}.language-modal h2{margin:10px 0 8px;font-size:clamp(27px,4vw,34px)}.language-modal-lead{max-width:36ch;color:var(--muted);font-size:13.5px;line-height:1.7}.language-modal-options{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:22px}.language-option{display:flex;flex-direction:column;align-items:flex-start;gap:5px;padding:18px 16px;border:1px solid var(--line);border-radius:16px;background:#ffffff06;text-align:start;transition:color .16s,border-color .16s,background .16s}.language-option:hover{border-color:var(--accent-line);background:var(--accent-soft)}.language-option:focus-visible{outline:2px solid var(--accent);outline-offset:2px}.language-option-name{font-family:var(--serif);font-size:22px;font-weight:600;line-height:1.2;color:var(--text)}.language-option[lang=fa] .language-option-name{font-family:Vazirmatn,Tahoma,sans-serif;font-weight:700}.language-option-label{font-size:10.5px;color:var(--faint)}.language-modal-note{margin-top:16px;text-align:center;font-size:10.5px;color:var(--faint)}@keyframes language-modal-fade{0%{opacity:0}}@keyframes language-modal-in{0%{opacity:0;transform:translateY(12px) scale(.98)}}.level-card{border:1px solid var(--line);background:#ffffff06;border-radius:14px;padding:14px}.level-card-top{display:flex;justify-content:space-between;align-items:baseline;gap:8px;font-size:11.5px;color:var(--muted);margin-bottom:10px}.level-card-top strong{color:var(--accent);font-size:12px}.level-card-sub{display:flex;justify-content:space-between;margin-top:8px;font-size:10.5px;color:var(--faint)}.sidebar-note{font-size:10.5px;color:var(--faint);text-align:center;letter-spacing:.02em}.mobile-header,.mobile-nav{display:none}.main-content{margin-left:var(--sidebar);padding:42px clamp(22px,4vw,54px) 90px;min-height:100vh}.page{max-width:1180px;margin:0 auto;animation:page-in .5s cubic-bezier(.22,.8,.24,1) both}@keyframes page-in{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}.route-loading{display:grid;place-items:center;min-height:52vh}.route-loading-bar{width:132px;height:6px;border-radius:999px;background:linear-gradient(90deg,var(--line),var(--accent),var(--line));background-size:200% 100%;animation:route-loading 1.1s linear infinite}@keyframes route-loading{0%{background-position:200% 0}to{background-position:-200% 0}}@media(prefers-reduced-motion:reduce){.route-loading-bar{animation:none;background:var(--accent)}}.eyebrow{display:inline-block;font-family:var(--sans);font-size:10.5px;font-weight:700;letter-spacing:.16em;text-transform:uppercase;color:var(--accent);line-height:1.4}.muted{color:var(--muted)}.text-link{display:inline-flex;align-items:center;gap:5px;color:var(--accent);font-size:12.5px;font-weight:600;white-space:nowrap}.text-link:hover{color:var(--accent-bright)}.icon-link{display:grid;place-items:center;width:34px;height:34px;border:1px solid var(--line);border-radius:50%;color:var(--muted);transition:.18s}.icon-link:hover{color:var(--accent);border-color:var(--accent-line)}.topic-chip{display:inline-flex;align-items:center;gap:6px;padding:5px 9px;border:1px solid var(--line);border-radius:999px;background:#ffffff06;color:var(--muted);font-size:11px;line-height:1.3;white-space:nowrap}.topic-chip b{color:var(--text);font-weight:650}.topic-chip.muted{color:var(--faint)}.done-chip{display:inline-flex;align-items:center;gap:4px;border:1px solid rgba(143,202,155,.28);background:var(--green-soft);color:var(--green);border-radius:999px;padding:4px 8px;font-size:10.5px;font-weight:650}.next-chip{display:inline-flex;border-radius:999px;padding:3px 8px;background:var(--accent-soft);color:var(--accent);font-size:10px;font-weight:700;letter-spacing:.05em;text-transform:uppercase}.button{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:1px solid transparent;border-radius:999px;padding:11px 19px;font-size:13.5px;font-weight:650;line-height:1.2;white-space:nowrap;transition:transform .16s,background .16s,border-color .16s,color .16s,opacity .16s}.button:hover{transform:translateY(-1px)}.button.primary{background:linear-gradient(180deg,var(--accent-bright),var(--accent));color:#1b1408;box-shadow:0 6px 20px #e8b5682e}.button.primary:hover{background:linear-gradient(180deg,#f7d598,var(--accent-bright))}.button.secondary{background:#ffffff09;border-color:var(--line-strong);color:var(--text)}.button.secondary:hover{background:#ffffff12;border-color:#f0ece44d}.button.ghost{background:transparent;color:var(--muted);border-color:transparent}.button.ghost:hover{color:var(--text);background:#ffffff0a}.button.danger{background:var(--red-soft);border-color:#e8836f4d;color:var(--red)}.button.small{padding:8px 13px;font-size:12px}.button.large{padding:14px 24px;font-size:14.5px}.button:disabled{opacity:.4;transform:none}.icon-button{display:grid;place-items:center;width:36px;height:36px;border-radius:50%;border:1px solid var(--line);background:transparent;color:var(--muted);transition:.16s}.icon-button:hover{color:var(--text);background:#ffffff0f;border-color:var(--line-strong)}.button-row{display:flex;flex-wrap:wrap;align-items:center;gap:10px}.progress-track{height:6px;border-radius:999px;background:#ffffff12;overflow:hidden}.progress-track.slim{height:4px}.progress-fill{height:100%;border-radius:inherit;background:linear-gradient(90deg,#c8954b,var(--accent-bright));transition:width .5s cubic-bezier(.22,.8,.24,1)}.inline-progress{display:flex;align-items:center;gap:10px}.inline-progress .progress-track{flex:1}.inline-progress span{font-size:11px;color:var(--faint);min-width:30px;text-align:right}.strength-track{height:3px;border-radius:99px;background:#ffffff12;overflow:hidden}.strength-fill{height:100%;border-radius:inherit;background:var(--accent)}.ring{width:118px;height:118px;border-radius:50%;padding:3px;flex-shrink:0}.ring-inner{width:100%;height:100%;border-radius:50%;background:var(--panel);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:1px;text-align:center}.ring-inner strong{font-family:var(--serif);font-size:31px;font-weight:400;line-height:1}.ring-inner span{font-size:9.5px;color:var(--faint);line-height:1.2}.panel{border:1px solid var(--line);border-radius:var(--radius);background:linear-gradient(180deg,#ffffff06,#ffffff02);padding:24px}.panel-head{display:flex;justify-content:space-between;align-items:flex-start;gap:18px;margin-bottom:18px}.panel-head h2{margin-top:5px;font-size:26px}.side-note{color:var(--muted);font-size:12.5px;line-height:1.65}.side-note a{color:var(--accent)}.section-heading{display:flex;align-items:baseline;gap:12px;margin-bottom:14px}.section-number{font-family:var(--sans);font-size:10px;letter-spacing:.12em;color:var(--accent);border:1px solid var(--accent-line);border-radius:999px;padding:3px 7px;flex-shrink:0}.section-heading h2{font-size:27px}.page-header{display:flex;justify-content:space-between;align-items:flex-end;gap:40px;margin-bottom:36px}.page-header h1{margin:8px 0 12px}.page-header p{color:var(--muted);max-width:650px;font-size:14.5px}.header-stat{flex-shrink:0;width:240px;border-left:1px solid var(--line);padding-left:24px;display:flex;flex-direction:column;gap:7px}.header-stat>span{font-size:10px;text-transform:uppercase;letter-spacing:.13em;color:var(--faint)}.header-stat>strong{font-family:var(--serif);font-size:30px;font-weight:400;display:flex;align-items:center;gap:8px}.header-stat small{font-size:11px;color:var(--faint)}.header-stat .progress-track{margin-top:4px}.breadcrumbs{display:flex;align-items:center;flex-wrap:wrap;gap:7px;margin-bottom:24px;font-size:11.5px;color:var(--faint)}.breadcrumbs a{color:var(--muted)}.breadcrumbs a:hover{color:var(--accent)}.hero{position:relative;display:grid;grid-template-columns:minmax(0,1fr) 392px;gap:48px;align-items:center;border:1px solid var(--line);border-radius:30px;padding:48px;background:radial-gradient(700px 340px at 92% 8%,rgba(232,181,104,.12),transparent 65%),radial-gradient(500px 300px at 0% 110%,rgba(121,199,184,.07),transparent 70%),linear-gradient(150deg,#171a21,#111318);overflow:hidden}.hero:after{content:"𝄞";position:absolute;right:-34px;bottom:-82px;font-family:Noto Music;font-size:300px;line-height:1;color:#f0ece407;pointer-events:none}.hero-copy{position:relative;z-index:1}.hero h1{margin:12px 0 16px;max-width:640px;font-size:clamp(40px,4.2vw,57px)}.hero h1 em{color:var(--accent);font-style:italic}.hero h1 .hero-greeting,.hero h1 .hero-motto{display:block}.hero-lead{max-width:540px;color:var(--muted);font-size:14.5px;line-height:1.7}.hero .button-row{margin-top:26px}.hero-meta{display:flex;flex-wrap:wrap;gap:16px;margin-top:24px;padding-top:20px;border-top:1px solid var(--line)}.hero-meta-item{display:inline-flex;align-items:center;gap:6px;color:var(--faint);font-size:11px}.hero-meta-item svg{color:var(--accent)}.hero-side{position:relative;z-index:1}.daily-card{border:1px solid var(--line-strong);border-radius:20px;padding:20px;background:#0b0c0f80;backdrop-filter:blur(10px)}.daily-card-head{display:flex;justify-content:space-between;align-items:center;gap:10px;margin-bottom:18px}.daily-main{display:flex;align-items:center;gap:20px}.daily-copy h3{font-size:21px;margin-bottom:5px}.daily-copy p{color:var(--muted);font-size:12px;line-height:1.55;margin-bottom:12px}.daily-foot{display:flex;justify-content:space-between;gap:10px;margin-top:18px;padding-top:14px;border-top:1px solid var(--line);font-size:11px;color:var(--muted)}.daily-foot span{display:inline-flex;align-items:center;gap:5px}.daily-foot svg{color:var(--accent)}.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin:18px 0}.stat-card{display:flex;align-items:center;gap:13px;border:1px solid var(--line);border-radius:16px;background:#ffffff05;padding:16px}.stat-icon{display:grid;place-items:center;width:38px;height:38px;border-radius:11px;flex-shrink:0}.stat-icon.warm{color:var(--accent);background:var(--accent-soft)}.stat-icon.cool{color:var(--blue);background:#8fb8e81a}.stat-icon.green{color:var(--green);background:var(--green-soft)}.stat-icon.lilac{color:var(--lilac);background:#b8a3e81a}.stat-card>div{display:flex;flex-direction:column;line-height:1.2;min-width:0}.stat-card strong{font-family:var(--serif);font-size:25px;font-weight:400}.stat-card span{font-size:10px;color:var(--faint);white-space:nowrap}.stat-card small{margin-left:auto;font-size:9.5px;color:var(--faint);white-space:nowrap}.two-col{display:grid;grid-template-columns:minmax(0,1.45fr) minmax(0,.9fr);gap:18px;margin-bottom:18px}.continue-panel{display:flex;flex-direction:column}.continue-card{display:flex;align-items:center;gap:18px;border:1px solid var(--line);border-radius:15px;background:#ffffff05;padding:18px;margin-bottom:20px}.course-glyph{display:grid;place-items:center;width:64px;height:64px;border-radius:16px;font-family:"Noto Music",var(--serif);font-size:34px;flex-shrink:0}.course-glyph.small{width:48px;height:48px;border-radius:13px;font-size:25px;background:color-mix(in srgb,var(--course-color) 13%,transparent);color:var(--course-color)}.continue-copy{flex:1;min-width:0}.course-level{font-size:10px;text-transform:uppercase;letter-spacing:.09em;color:var(--faint)}.continue-copy h3{font-size:23px;margin:3px 0 4px}.continue-copy p{color:var(--muted);font-size:12.5px;margin-bottom:10px}.path-strip{display:grid;grid-template-columns:repeat(5,1fr);gap:14px;margin-top:auto;padding-top:18px;border-top:1px solid var(--line)}.path-item-head{display:flex;justify-content:space-between;gap:4px;font-size:9.5px;color:var(--muted);margin-bottom:6px}.path-item-head small{color:var(--faint)}.review-panel{display:flex;flex-direction:column}.review-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:2px}.review-row{display:flex;align-items:center;gap:11px;padding:9px 0;border-bottom:1px solid var(--line)}.review-list li:last-child .review-row{border-bottom:0}.review-dot{width:7px;height:7px;border-radius:50%;background:var(--accent);flex-shrink:0}.review-info{flex:1;min-width:0}.review-info>span{display:block;font-size:12.5px;margin-bottom:5px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.review-status{font-size:9.5px;color:var(--faint);text-transform:uppercase;letter-spacing:.08em}.review-status.due{color:var(--accent)}.review-empty{flex:1;display:flex;flex-direction:column;align-items:flex-start;justify-content:center;padding:8px 0 16px}.empty-glyph{display:grid;place-items:center;width:44px;height:44px;border-radius:13px;background:var(--accent-soft);color:var(--accent);margin-bottom:12px}.review-empty h3{font-size:20px;margin-bottom:5px}.review-empty p{color:var(--muted);font-size:12.5px;max-width:320px;margin-bottom:14px}.review-foot{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-top:auto;padding-top:16px;border-top:1px solid var(--line);font-size:10px;color:var(--faint)}.review-foot>span{display:inline-flex;align-items:center;gap:5px}.review-foot svg{color:var(--accent)}.quick-section{margin-top:18px}.quick-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}.quick-card{display:flex;align-items:center;gap:12px;border:1px solid var(--line);border-radius:15px;background:#ffffff05;padding:16px;transition:.18s}.quick-card:hover{background:#ffffff0a;border-color:var(--accent-line);transform:translateY(-2px)}.quick-icon{display:grid;place-items:center;width:40px;height:40px;border-radius:12px;background:var(--accent-soft);color:var(--accent);flex-shrink:0}.quick-card>div{display:flex;flex-direction:column;min-width:0}.quick-card strong{font-size:12.5px}.quick-card span{font-size:10.5px;color:var(--faint)}.quick-arrow{margin-left:auto;color:var(--faint);flex-shrink:0}.starter-note{display:flex;align-items:center;gap:14px;margin-top:18px;border:1px dashed var(--line-strong);border-radius:16px;padding:16px 18px}.starter-note-icon{display:grid;place-items:center;width:38px;height:38px;border-radius:50%;background:var(--accent-soft);color:var(--accent);flex-shrink:0}.starter-note>div:nth-child(2){flex:1}.starter-note strong{font-size:13px}.starter-note p{font-size:11.5px;color:var(--muted)}.level-stack{display:flex;flex-direction:column;gap:42px}.level-heading{display:flex;align-items:center;gap:16px;margin-bottom:18px;padding-bottom:14px;border-bottom:1px solid var(--line)}.level-index{font-family:var(--serif);font-size:34px;color:var(--accent);opacity:.7;line-height:1}.level-heading h2{font-size:27px}.level-heading p{font-size:12px;color:var(--faint)}.level-progress{margin-left:auto;width:210px;display:flex;flex-direction:column;gap:6px;font-size:10px;color:var(--faint);text-align:right}.course-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}.course-card{display:flex;flex-direction:column;gap:8px;border:1px solid var(--line);border-radius:18px;background:linear-gradient(180deg,#ffffff06,#ffffff02);padding:20px;min-height:220px;transition:.2s;position:relative;overflow:hidden}.course-card:before{content:"";position:absolute;inset:0 0 auto;height:2px;background:linear-gradient(90deg,transparent,var(--course-color),transparent);opacity:.4}.course-card:hover{border-color:color-mix(in srgb,var(--course-color) 42%,var(--line));transform:translateY(-3px);background:linear-gradient(180deg,#ffffff0b,#ffffff03)}.course-card-top{display:flex;justify-content:space-between;align-items:flex-start;gap:10px}.course-state{font-size:9.5px;letter-spacing:.06em;text-transform:uppercase;color:var(--faint);display:inline-flex;align-items:center;gap:4px}.course-state.complete{color:var(--green)}.course-card h3{font-size:23px;margin-top:4px}.course-card>p{font-size:12px;color:var(--muted);line-height:1.55;flex:1}.course-card-meta{display:flex;gap:14px;font-size:10px;color:var(--faint);margin-top:6px}.course-card-meta span{display:inline-flex;align-items:center;gap:5px}.course-hero{display:flex;align-items:flex-start;gap:26px;border:1px solid var(--line);border-radius:var(--radius-lg);padding:32px;background:radial-gradient(500px 260px at 100% 0,color-mix(in srgb,var(--course-color) 13%,transparent),transparent 65%),linear-gradient(160deg,#171a21,#111318);margin-bottom:22px}.course-hero-glyph{display:grid;place-items:center;width:92px;height:92px;border-radius:24px;font-family:"Noto Music",var(--serif);font-size:50px;color:var(--course-color);background:color-mix(in srgb,var(--course-color) 12%,transparent);border:1px solid color-mix(in srgb,var(--course-color) 24%,transparent);flex-shrink:0}.course-hero-copy{flex:1;min-width:0}.course-hero-copy h1{margin:7px 0 8px;font-size:clamp(34px,3.6vw,50px)}.course-hero-copy>p{color:var(--muted);max-width:620px;font-size:14px}.course-hero-meta{display:flex;flex-wrap:wrap;gap:16px;margin-top:16px;font-size:11px;color:var(--faint)}.course-hero-meta span{display:inline-flex;align-items:center;gap:6px}.course-hero-meta svg{color:var(--course-color)}.course-hero-action{width:190px;display:flex;flex-direction:column;gap:14px;flex-shrink:0}.course-progress-ring{display:flex;flex-direction:column;gap:4px;border-left:1px solid var(--line);padding-left:20px}.course-progress-ring strong{font-family:var(--serif);font-size:34px;font-weight:400;line-height:1}.course-progress-ring span{font-size:10px;color:var(--faint)}.course-progress-ring .progress-track{margin-top:6px}.course-layout{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:18px;align-items:start}.lesson-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column}.lesson-list li{border-bottom:1px solid var(--line)}.lesson-list li:last-child{border-bottom:0}.lesson-row{display:flex;align-items:center;gap:16px;padding:15px 10px;border-radius:12px;transition:background .16s}.lesson-row:hover{background:#ffffff09}.lesson-row.next{background:#e8b5680b}.lesson-number{display:grid;place-items:center;width:38px;height:38px;border-radius:50%;border:1px solid var(--line);color:var(--faint);font-size:11px;flex-shrink:0}.lesson-number.complete{color:var(--green);border-color:#8fca9b4d;background:var(--green-soft)}.lesson-row-copy{flex:1;min-width:0}.lesson-row-title{display:flex;align-items:center;flex-wrap:wrap;gap:8px}.lesson-row-title h3{font-size:19px}.lesson-row-copy>p{color:var(--muted);font-size:11.5px;margin-top:2px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.lesson-row-meta{display:flex;flex-wrap:wrap;gap:13px;font-size:9.5px;color:var(--faint);margin-top:5px}.lesson-row-meta span{display:inline-flex;align-items:center;gap:4px}.lesson-row-arrow{color:var(--faint);flex-shrink:0}.course-side{display:flex;flex-direction:column;gap:14px}.course-side h2{font-size:22px;margin:5px 0 12px}.skill-cloud{display:flex;flex-wrap:wrap;gap:6px}.skill-cloud.compact{margin-top:12px}.method-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:10px}.method-list li{display:flex;align-items:flex-start;gap:9px;font-size:11.5px;color:var(--muted)}.method-list svg{color:var(--accent);flex-shrink:0;margin-top:1px}.lesson-header{display:flex;justify-content:space-between;align-items:flex-end;gap:30px;border-bottom:1px solid var(--line);padding-bottom:24px;margin-bottom:24px}.lesson-header h1{margin:9px 0 10px;max-width:780px;font-size:clamp(36px,4vw,54px)}.lesson-header-main>p{color:var(--muted);max-width:650px;font-size:14px}.lesson-meta{display:flex;flex-wrap:wrap;align-items:center;gap:14px;margin-top:16px;font-size:10.5px;color:var(--faint)}.lesson-meta>span{display:inline-flex;align-items:center;gap:5px}.lesson-header-badge{display:flex;flex-direction:column;align-items:center;gap:2px;flex-shrink:0;color:var(--faint);font-size:9px;text-transform:uppercase;letter-spacing:.14em}.lesson-big-number{font-family:var(--serif);font-size:58px;line-height:1;color:var(--accent);opacity:.55}.lesson-layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:20px;align-items:start}.lesson-content{padding:34px 38px}.lesson-section{padding-bottom:30px;margin-bottom:30px;border-bottom:1px solid var(--line);scroll-margin-top:90px}.lesson-section:last-of-type{border-bottom:0;margin-bottom:0}.rich-text{color:#d9d4ca;font-size:14.5px;line-height:1.78}.rich-text p+p{margin-top:13px}.rich-text strong{color:var(--text);font-weight:650}.rich-text em{color:#cbc4b8}.rich-text ul,.rich-text ol{margin:14px 0;padding-left:20px;display:flex;flex-direction:column;gap:8px}.rich-text li::marker{color:var(--accent)}.inline-code{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.88em;background:#ffffff0f;border:1px solid var(--line);border-radius:5px;padding:1px 5px}.notation-panel{border:1px solid var(--line);border-radius:15px;background:radial-gradient(500px 200px at 50% 0,rgba(232,181,104,.035),transparent 70%),#0e1014;padding:12px 16px;margin:22px 0 8px;overflow:hidden}.lesson-notation{margin:24px 0 10px}.lesson-instrument{margin:24px 0 10px;padding:16px;border:1px solid rgba(232,181,104,.26);border-radius:16px;background:radial-gradient(520px 220px at 12% 0,rgba(232,181,104,.075),transparent 72%),#0d0f13}.lesson-instrument-top{display:flex;align-items:flex-start;justify-content:space-between;gap:14px;margin-bottom:12px}.lesson-instrument-title{display:flex;align-items:flex-start;gap:10px;min-width:0}.lesson-instrument-title>div{display:flex;flex-direction:column;gap:2px;min-width:0}.lesson-instrument-title strong{font-family:var(--serif);font-size:17px;font-weight:600;line-height:1.3;color:var(--text)}.lesson-instrument-icon{display:grid;place-items:center;width:34px;height:34px;flex-shrink:0;border-radius:10px;background:var(--accent-soft);color:var(--accent)}.lesson-instrument-play{flex-shrink:0}.lesson-instrument-body{font-size:13.5px;line-height:1.72;color:#ddd7cc;margin-bottom:14px}.lesson-instrument-body p+p{margin-top:10px}.lesson-instrument-surface{padding:10px 12px 12px;border:1px solid var(--line);border-radius:12px;background:#08090c}.lesson-instrument-surface .instrument-surface{gap:14px}.lesson-instrument-caption{margin-top:10px;font-size:10.5px;line-height:1.5;color:var(--faint)}.staff,.rhythm-display{display:block;width:100%;height:auto}.staff-line,.staff-ledger{stroke:#f0ece46b;stroke-width:1.15}.staff-ledger{stroke-width:1.5}.staff-note-head{fill:var(--text)}.staff-stem{stroke:var(--text);stroke-width:1.55}.staff-clef,.staff-accidental{fill:#e9e4da}.staff-time text{fill:var(--text);font-family:var(--serif);font-weight:600}.music-glyph{font-family:Noto Music,Noto Sans Symbols,serif}.rhythm-line{stroke:#f0ece43d;stroke-width:1}.rhythm-display{color:var(--text)}.rhythm-display text{font-size:14px}.listen-button{display:inline-flex;align-items:center;gap:12px;border:1px solid var(--line-strong);border-radius:14px;background:#ffffff08;color:var(--text);padding:10px 16px 10px 10px;margin-top:18px;text-align:left;transition:.18s}.listen-button:hover{border-color:var(--accent-line);background:var(--accent-soft)}.listen-button.inline{margin-top:16px}.listen-icon{display:grid;place-items:center;width:38px;height:38px;border-radius:10px;background:var(--accent-soft);color:var(--accent);flex-shrink:0}.listen-button>span:nth-child(2){display:flex;flex-direction:column;line-height:1.25}.listen-button strong{font-size:12.5px}.listen-button small{font-size:10px;color:var(--faint)}.listen-play{margin-left:8px;color:var(--accent)}.lesson-aside{position:relative}.side-sticky{position:sticky;top:24px;padding:20px}.toc{display:flex;flex-direction:column;gap:2px;margin-top:10px}.toc a{display:flex;gap:9px;padding:7px 0;font-size:11.5px;color:var(--muted);line-height:1.4;transition:color .16s}.toc a span{color:var(--faint);font-size:9px;padding-top:2px}.toc a:hover{color:var(--accent)}.aside-divider{height:1px;background:var(--line);margin:16px 0}.aside-instrument{display:flex;align-items:center;gap:8px;margin-top:8px;font-size:12px}.aside-instrument svg{color:var(--accent)}.aside-instrument a{margin-left:auto;color:var(--accent);font-size:10.5px}.aside-instrument-preview{margin-top:10px;border:1px solid var(--line);border-radius:10px;background:#0e1014;padding:6px;overflow:hidden}.aside-instrument-preview .instrument-caption,.aside-instrument-preview .instrument-heading{display:none}.lesson-practice{scroll-margin-top:24px;padding-top:6px}.practice-banner{display:flex;align-items:center;gap:18px;border:1px solid var(--accent-line);border-radius:18px;background:radial-gradient(400px 160px at 0 0,rgba(232,181,104,.1),transparent 70%),#e8b56809;padding:22px}.practice-banner-icon{display:grid;place-items:center;width:54px;height:54px;border-radius:15px;background:var(--accent);color:#191307;flex-shrink:0}.practice-banner-copy{flex:1;min-width:0}.practice-banner-copy h2{font-size:24px;margin:3px 0 4px}.practice-banner-copy>p{font-size:11.5px;color:var(--muted)}.session-embed{margin-top:22px}.lesson-result{display:flex;align-items:center;gap:14px;margin-top:18px;border:1px solid var(--line);border-radius:14px;padding:14px 16px}.lesson-result.passed{border-color:#8fca9b40;background:var(--green-soft)}.lesson-result.failed{border-color:#e8836f38;background:var(--red-soft)}.lesson-result-icon{display:grid;place-items:center;width:34px;height:34px;border-radius:50%;background:#ffffff0f;flex-shrink:0}.lesson-result.passed .lesson-result-icon{color:var(--green)}.lesson-result.failed .lesson-result-icon{color:var(--red)}.lesson-result>div{flex:1}.lesson-result strong{font-size:13px}.lesson-result p{font-size:11.5px;color:var(--muted);margin-top:2px}.lesson-pager{display:flex;justify-content:space-between;gap:16px;margin-top:34px;padding-top:24px;border-top:1px solid var(--line)}.pager-link{display:flex;flex-direction:column;gap:3px;max-width:45%}.pager-link.next{text-align:right;margin-left:auto}.pager-link span{font-size:9.5px;text-transform:uppercase;letter-spacing:.1em;color:var(--faint)}.pager-link strong{font-family:var(--serif);font-size:17px;font-weight:400;color:var(--muted);transition:color .16s}.pager-link:hover strong{color:var(--accent)}.exercise-session{border:1px solid var(--line);border-radius:20px;background:linear-gradient(180deg,#15181e,#101217);padding:22px}.session-head{display:flex;justify-content:space-between;align-items:flex-start;gap:16px;margin-bottom:12px}.session-count{font-family:var(--serif);font-size:23px;line-height:1.2;margin-top:3px}.session-count span{color:var(--faint);font-size:15px}.session-head-right{display:flex;align-items:center;gap:8px}.exercise-session>.progress-track{margin-bottom:20px}.question-card{border:1px solid var(--line);border-radius:16px;background:#ffffff05;overflow:hidden}.question-body{padding:24px}.question-prompt{font-size:clamp(24px,2.5vw,32px);line-height:1.2}.question-instruction{color:var(--muted);font-size:12px;margin-top:5px}.question-body .notation-panel{margin:20px 0 4px}.rhythm-panel{padding:4px 12px}.choice-grid{display:grid;grid-template-columns:1fr 1fr;gap:9px;margin-top:22px}.choice{display:flex;align-items:center;gap:10px;border:1px solid var(--line-strong);border-radius:12px;background:#ffffff06;color:var(--text);padding:12px 14px;text-align:left;transition:.16s}.choice:hover:not(:disabled){border-color:var(--accent-line);background:var(--accent-soft)}.choice-letter{display:grid;place-items:center;width:22px;height:22px;border-radius:6px;border:1px solid var(--line);color:var(--faint);font-size:10px;flex-shrink:0}.choice-text{flex:1;font-size:13px;font-weight:550}.choice-grid.rhythm-choices{grid-template-columns:1fr}.choice-rhythm{flex:1;min-width:0;display:flex;align-items:center}.choice-rhythm .rhythm-display{width:100%;max-width:360px;height:auto}.choice.correct{border-color:#8fca9b73;background:var(--green-soft);color:var(--green)}.choice.correct .choice-letter{border-color:#8fca9b59;color:var(--green)}.choice.wrong{border-color:#e8836f73;background:var(--red-soft);color:var(--red)}.choice.wrong .choice-letter{border-color:#e8836f59;color:var(--red)}.choice:disabled{opacity:.72}.choice.correct:disabled,.choice.wrong:disabled{opacity:1}.feedback-panel{border-top:1px solid var(--line);padding:20px 24px;background:#ffffff05}.feedback-panel.correct{border-top-color:#8fca9b33;background:#8fca9b0a}.feedback-panel.wrong{border-top-color:#e8836f2e;background:#e8836f09}.feedback-head{display:flex;align-items:center;flex-wrap:wrap;gap:9px;margin-bottom:7px;font-size:13px}.feedback-icon{display:grid;place-items:center;width:26px;height:26px;border-radius:50%;color:var(--green);background:var(--green-soft)}.feedback-panel.wrong .feedback-icon{color:var(--red);background:var(--red-soft)}.feedback-answer{margin-left:auto;font-size:11px;color:var(--muted);border:1px solid var(--line);border-radius:999px;padding:2px 8px}.feedback-panel>p{color:var(--muted);font-size:12.5px;line-height:1.6;margin-bottom:12px}.feedback-hint{border-left:2px solid var(--accent-line);padding-left:10px;color:var(--faint)!important;font-size:11.5px!important}.feedback-answer-line{margin-top:-4px}.feedback-answer-line strong{color:var(--text)}.feedback-panel .button{margin-top:2px}.instrument-question{margin-top:22px}.instrument-surface{display:flex;flex-direction:column;gap:18px}.instrument-heading{display:flex;align-items:center;gap:7px;margin-bottom:7px;font-size:10.5px;text-transform:uppercase;letter-spacing:.08em;color:var(--faint)}.instrument-heading svg{color:var(--accent)}.instrument-caption{font-size:10px;color:var(--faint);margin-top:6px;text-align:center}.piano-wrap{width:100%;border-radius:10px;overflow:hidden;background:#07080a;border:1px solid var(--line)}.piano{display:block;width:100%;height:auto}.piano-key{cursor:pointer}.piano-key.disabled{cursor:default}.piano-key.white rect:first-child{fill:#f0ebe0;stroke:#c8c1b3;stroke-width:1;transition:fill .12s}.piano-key.white:hover rect:first-child{fill:#fffdf8}.piano-key.white.is-c rect:first-child{fill:#e9e2d4}.piano-key.black rect:first-child{fill:#16181e;stroke:#000;stroke-width:1;transition:fill .12s}.piano-key.black:hover rect:first-child{fill:#242833}.piano-key.white.mark-selected rect:first-child{fill:var(--accent)}.piano-key.black.mark-selected rect:first-child{fill:#a8752f}.piano-key.white.mark-root rect:first-child{fill:var(--accent)}.piano-key.black.mark-root rect:first-child{fill:#b07f33}.piano-key.white.mark-lesson rect:first-child{fill:#d8c4a0}.piano-key.black.mark-lesson rect:first-child{fill:#826331}.piano-key.white.mark-correct rect:first-child{fill:#b9dfc1}.piano-key.black.mark-correct rect:first-child{fill:#4e8058}.piano-key.white.mark-wrong rect:first-child{fill:#eab9ae}.piano-key.black.mark-wrong rect:first-child{fill:#8e4b40}.key-mark{fill:#0b0c0f8c}.piano-label{font-family:var(--sans);font-size:12px;fill:#6e6a61;text-anchor:middle;pointer-events:none;font-weight:550}.piano-label.is-c{fill:#a06f2a;font-weight:750}.piano-label.black-label{font-size:9px;fill:#b9b3a7}.piano-label.piano-solfege{font-size:8.5px;font-weight:500;opacity:.78}.piano-label.black-label.piano-solfege{font-size:7.5px}.string-solfege{font-size:8.5px;opacity:.78}.piano-octave{font-family:var(--sans);font-size:8.5px;fill:#a49e92;text-anchor:middle;pointer-events:none}.piano-key.mark-correct .piano-label,.piano-key.mark-selected .piano-label,.piano-key.mark-root .piano-label,.piano-key.mark-lesson .piano-label{fill:#221a0d}.fretboard-scroll{overflow-x:auto;border-radius:12px;border:1px solid var(--line);background:#0c0e12;padding:4px 0;scrollbar-width:thin}.fretboard{display:block;min-width:760px;width:100%;height:auto}.fretboard-wood{fill:#201a14;stroke:#ffffff12}.fret{stroke:#f0ece452}.nut{stroke:#d8d2c6}.string-line{stroke:#e6e0d4b8;stroke-linecap:round}.string-label{fill:var(--faint);font-family:var(--sans);font-size:10px}.fret-number{fill:#f0ece44d;font-family:var(--sans);font-size:9px}.fret-marker{fill:#f0ece41c}.fret-position{cursor:pointer}.fret-position.disabled{cursor:default}.fret-hit{fill:transparent;transition:fill .12s}.fret-position:hover .fret-hit{fill:#e8b5681f}.fret-position.mark-selected .fret-hit{fill:#e8b56833}.fret-position.mark-root .fret-hit{fill:#e8b5683d}.fret-position.mark-lesson .fret-hit{fill:#e8b56821}.fret-position.mark-correct .fret-hit{fill:#8fca9b24}.fret-position.mark-wrong .fret-hit{fill:#e8836f26}.fret-mark-dot{fill:var(--accent);stroke:#17120a;stroke-width:1.5}.fret-position.mark-lesson .fret-mark-dot{fill:#c9a15d}.fret-position.mark-root .fret-mark-dot{fill:var(--accent-bright);stroke:#17120a;stroke-width:2}.fret-position.mark-correct .fret-mark-dot{fill:var(--green)}.fret-position.mark-wrong .fret-mark-dot{fill:var(--red)}.fret-note-label{fill:var(--text);font-family:var(--sans);font-size:9px;font-weight:650;paint-order:stroke;stroke:#0c0e12;stroke-width:2.5px;pointer-events:none}.selection-tray{border:1px solid var(--line);border-radius:12px;background:#ffffff06;padding:12px 14px;margin-bottom:16px}.selection-info{display:flex;justify-content:space-between;font-size:10px;text-transform:uppercase;letter-spacing:.09em;color:var(--faint);margin-bottom:8px}.selection-chips{display:flex;flex-wrap:wrap;gap:6px;min-height:28px;align-items:center}.selection-empty{font-size:11px;color:var(--faint)}.selection-chip{width:26px;height:26px;border-radius:50%;border:1px solid var(--accent-line);background:var(--accent-soft);color:var(--accent);font-size:11px;font-weight:700}.selection-actions{display:flex;justify-content:flex-end;gap:6px;margin-top:10px}.session-summary{display:flex;align-items:center;gap:36px;border:1px solid var(--line);border-radius:22px;background:radial-gradient(500px 250px at 0 0,rgba(232,181,104,.07),transparent 65%),linear-gradient(180deg,#161920,#101217);padding:34px}.summary-ring{width:152px;height:152px;border-radius:50%;padding:4px;flex-shrink:0}.summary-ring-inner{width:100%;height:100%;border-radius:50%;background:#121419;display:flex;flex-direction:column;align-items:center;justify-content:center}.summary-ring-inner strong{font-family:var(--serif);font-size:41px;font-weight:400;line-height:1}.summary-ring-inner span{font-size:9px;color:var(--faint);margin-top:5px;text-transform:uppercase;letter-spacing:.1em}.summary-copy{flex:1}.summary-copy h2{margin:5px 0 8px;font-size:36px}.summary-copy>p{color:var(--muted);font-size:13px;max-width:540px}.summary-stats{display:flex;gap:34px;margin:20px 0 14px}.summary-stats>div{display:flex;flex-direction:column;gap:2px}.summary-stats span{font-size:9.5px;text-transform:uppercase;letter-spacing:.1em;color:var(--faint)}.summary-stats strong{font-family:var(--serif);font-size:24px;font-weight:400}.summary-topics{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:20px}.summary-copy .button-row{margin-top:4px}.practice-header-stat{flex-direction:row;align-items:center;gap:14px;width:310px}.practice-header-stat .ring{width:84px;height:84px}.practice-header-stat .ring-inner strong{font-size:23px}.practice-header-stat .ring-inner span{font-size:8px}.practice-header-stat>div:last-child{display:flex;flex-direction:column;gap:4px}.practice-header-stat>div:last-child>strong{font-family:var(--serif);font-size:17px;font-weight:400}.practice-header-stat small{color:var(--faint)}.practice-toast{display:flex;align-items:center;gap:14px;border:1px solid rgba(143,202,155,.25);background:var(--green-soft);border-radius:14px;padding:14px 16px;margin-bottom:18px}.practice-toast-icon{display:grid;place-items:center;width:34px;height:34px;border-radius:50%;background:#8fca9b26;color:var(--green);flex-shrink:0}.practice-toast>div{flex:1}.practice-toast strong{font-size:12.5px}.practice-toast p{font-size:11.5px;color:var(--muted)}.practice-layout{display:grid;grid-template-columns:minmax(0,1.45fr) 330px;gap:18px;align-items:start}.practice-queue{min-height:420px}.starter-callout{display:flex;gap:14px;border:1px dashed var(--line-strong);border-radius:14px;padding:16px;margin-bottom:18px}.starter-callout-icon{display:grid;place-items:center;width:42px;height:42px;border-radius:12px;background:var(--accent-soft);color:var(--accent);flex-shrink:0}.starter-callout h3{font-size:19px;margin-bottom:4px}.starter-callout p{font-size:12px;color:var(--muted)}.queue-list{list-style:none;margin:0;padding:0}.queue-list li{border-bottom:1px solid var(--line)}.queue-row{display:flex;align-items:center;gap:14px;padding:13px 0}.queue-index{display:grid;place-items:center;width:32px;height:32px;border-radius:50%;border:1px solid var(--line);color:var(--faint);font-size:9px;flex-shrink:0}.queue-index.due{border-color:var(--accent-line);color:var(--accent);background:var(--accent-soft)}.queue-copy{flex:1;min-width:0;display:flex;flex-direction:column;gap:2px}.queue-copy strong{font-size:12.5px}.queue-copy span{font-size:10px;color:var(--faint)}.queue-strength{width:120px;flex-shrink:0;display:flex;flex-direction:column;align-items:flex-end;gap:5px}.queue-strength .strength-track{width:100%}.queue-strength>span{font-size:9px;color:var(--faint);text-transform:uppercase;letter-spacing:.07em}.practice-start{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-top:22px;padding-top:20px;border-top:1px solid var(--line)}.practice-start strong{font-size:13px}.practice-start p{font-size:11px;color:var(--faint);max-width:400px;margin-top:3px}.practice-side{display:flex;flex-direction:column;gap:14px}.practice-side h2{font-size:22px;margin:4px 0 14px}.practice-stats{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-bottom:16px}.practice-stats>div{display:flex;flex-direction:column;gap:2px;border:1px solid var(--line);border-radius:11px;padding:10px}.practice-stats span{font-size:9px;color:var(--faint);text-transform:uppercase;letter-spacing:.07em}.practice-stats strong{font-size:13px;display:inline-flex;align-items:center;gap:4px}.practice-stats svg{color:var(--accent)}.review-timeline{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:12px}.review-timeline li{display:grid;grid-template-columns:44px 1fr;gap:10px;align-items:baseline}.review-timeline li span{font-size:9px;text-transform:uppercase;letter-spacing:.08em;color:var(--accent)}.review-timeline p{font-size:11.5px;color:var(--muted);line-height:1.5}.instrument-mini .aside-instrument{margin-top:4px}.trainer-header-stat{align-items:flex-start}.instrument-title{font-size:22px!important}.trainer-layout{display:grid;grid-template-columns:minmax(0,1.5fr) 330px;gap:18px;align-items:start}.trainer-builder{padding:26px}.trainer-step+.trainer-step{margin-top:28px;padding-top:26px;border-top:1px solid var(--line)}.trainer-step-head{display:flex;gap:13px;align-items:flex-start;margin-bottom:16px}.step-number{display:grid;place-items:center;width:30px;height:30px;border-radius:50%;border:1px solid var(--accent-line);color:var(--accent);font-size:9px;flex-shrink:0}.trainer-step-head h2{font-size:24px}.trainer-step-head p{font-size:11.5px;color:var(--faint)}.topic-grid{display:grid;grid-template-columns:1fr 1fr;gap:8px}.topic-card{position:relative;display:flex;align-items:center;gap:11px;border:1px solid var(--line);border-radius:12px;background:#ffffff05;padding:12px;text-align:left;transition:.16s}.topic-card:hover{background:#ffffff0a;border-color:var(--line-strong)}.topic-card.selected{border-color:var(--accent-line);background:var(--accent-soft)}.topic-glyph{display:grid;place-items:center;width:34px;height:34px;border-radius:9px;background:#ffffff0d;color:var(--accent);font-family:"Noto Music",var(--serif);font-size:18px;flex-shrink:0}.topic-copy{display:flex;flex-direction:column;min-width:0;padding-right:12px}.topic-copy strong{font-size:12px}.topic-copy small{font-size:9.5px;color:var(--faint);line-height:1.4}.topic-check{position:absolute;top:8px;right:8px;display:grid;place-items:center;width:18px;height:18px;border-radius:50%;background:var(--accent);color:#1a1408}.topic-card.mixed{grid-column:span 2}.difficulty-row{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}.difficulty-card{display:flex;flex-direction:column;align-items:flex-start;gap:3px;border:1px solid var(--line);border-radius:12px;background:#ffffff05;padding:12px;text-align:left;transition:.16s}.difficulty-card:hover{border-color:var(--line-strong)}.difficulty-card.selected{border-color:var(--accent-line);background:var(--accent-soft)}.difficulty-dot{width:7px;height:7px;border-radius:50%;background:var(--faint);margin-bottom:5px}.difficulty-card.selected .difficulty-dot{background:var(--accent);box-shadow:0 0 0 3px #e8b56826}.difficulty-card strong{font-size:12px}.difficulty-card small{font-size:9px;color:var(--faint);line-height:1.4}.trainer-start{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-top:28px;padding-top:22px;border-top:1px solid var(--line)}.trainer-start strong{font-size:13px}.trainer-start p{font-size:11px;color:var(--faint);max-width:380px;margin-top:3px}.trainer-side{display:flex;flex-direction:column;gap:14px}.trainer-side h2{font-size:22px;margin:4px 0 10px}.trainer-skill-list{display:flex;flex-wrap:wrap;gap:6px}.trainer-tip{display:flex;gap:10px;border-top:1px solid var(--line);padding-top:14px;margin-top:16px}.trainer-tip svg{color:var(--accent);flex-shrink:0;margin-top:2px}.trainer-tip p{font-size:11px;color:var(--faint);line-height:1.6}.trainer-shortcut .text-link{margin-top:12px}.metronome{border:1px solid var(--line);border-radius:14px;background:#ffffff06;padding:14px 16px;margin-top:20px}.metronome-top{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-bottom:10px}.metronome-label{display:flex;align-items:center;gap:7px;font-size:11px;color:var(--muted)}.metronome-label svg{color:var(--accent)}.metronome-beats{display:flex;gap:6px}.metronome-beat{width:8px;height:8px;border-radius:50%;background:#ffffff1a;transition:background .1s,transform .1s}.metronome-beat.strong{background:#e8b56838}.metronome-beat.active{background:var(--accent);transform:scale(1.25)}.metronome-meters{display:flex;gap:4px;margin-bottom:12px}.meter-button{flex:1;border:1px solid var(--line);border-radius:8px;background:#ffffff05;color:var(--muted);font-size:10px;letter-spacing:.04em;padding:5px 0;transition:.15s}.meter-button:hover{border-color:var(--line-strong);color:var(--text)}.meter-button.active{border-color:#e8b56880;background:#e8b5681f;color:var(--accent)}.metronome-controls{display:flex;align-items:center;gap:8px}.bpm-display{display:flex;align-items:baseline;gap:4px;min-width:64px;justify-content:center}.bpm-display strong{font-family:var(--serif);font-size:22px;font-weight:400}.bpm-display span{font-size:8px;color:var(--faint)}.metronome-controls .button{margin-left:auto}.bpm-slider{width:100%;margin-top:10px;accent-color:var(--accent)}.settings-level{width:260px}.settings-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;align-items:start}.settings-panel{padding:26px}.account-panel{grid-column:span 2}.sync-pill{display:inline-flex;align-items:center;gap:7px;border:1px solid var(--line);border-radius:999px;padding:6px 11px;font-size:10px;letter-spacing:.05em;text-transform:uppercase;color:var(--muted);white-space:nowrap}.sync-dot{width:6px;height:6px;border-radius:50%;background:var(--faint)}.sync-pill.synced{color:var(--green);border-color:#8fca9b4d;background:var(--green-soft)}.sync-pill.synced .sync-dot{background:var(--green)}.sync-pill.syncing{color:var(--accent);border-color:var(--accent-line);background:var(--accent-soft)}.sync-pill.syncing .sync-dot{background:var(--accent);animation:sync-pulse 1.2s ease-in-out infinite}.sync-pill.error{color:var(--red);border-color:#e8836f4d;background:var(--red-soft)}.sync-pill.error .sync-dot{background:var(--red)}.sync-pill.offline{color:var(--blue);border-color:#8fb8e84d}@keyframes sync-pulse{50%{opacity:.3}}.sync-account{display:flex;flex-direction:column;gap:14px}.sync-identity{display:flex;align-items:center;gap:12px}.sync-avatar{display:grid;place-items:center;width:40px;height:40px;border-radius:50%;border:1px solid var(--accent-line);background:var(--accent-soft);color:var(--accent);flex-shrink:0}.sync-identity small{display:block;margin-top:2px;font-size:10.5px;color:var(--faint)}.sync-form{display:flex;flex-direction:column;gap:12px}.sync-input-row{display:flex;align-items:stretch;gap:10px}.sync-input{flex:1;min-width:0;border:1px solid var(--line-strong);border-radius:999px;background:#ffffff08;padding:10px 16px;font-size:13px;outline:none;transition:border-color .16s,box-shadow .16s}.sync-input:focus{border-color:var(--accent-line);box-shadow:0 0 0 3px var(--accent-soft)}.sync-notice{font-size:11px;color:var(--accent)}.settings-note code{border-radius:5px;background:#ffffff0f;padding:1px 5px;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.92em}.backup-row{display:flex;align-items:center;justify-content:space-between;gap:20px;padding-bottom:18px;margin-bottom:18px;border-bottom:1px solid var(--line)}.backup-row strong{font-size:12.5px}.backup-row p{max-width:46ch;margin-top:3px;font-size:11px;color:var(--faint)}.install-row{margin:18px 0 0;padding:18px 0 0;border-top:1px solid var(--line);border-bottom:none}.install-state{display:inline-flex;align-items:center;gap:6px;font-size:11.5px;color:var(--green);white-space:nowrap}.install-hint{max-width:34ch;font-size:11px;color:var(--faint);text-align:right}@media(max-width:1080px){.install-hint{text-align:left}}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.sidebar-sync{display:flex;align-items:center;gap:8px;border:1px solid var(--line);border-radius:10px;padding:8px 10px;font-size:10.5px;color:var(--faint);text-decoration:none;transition:color .16s,border-color .16s}.sidebar-sync:hover{color:var(--text);border-color:var(--line-strong)}.sidebar-sync.synced{color:var(--green)}.sidebar-sync.error{color:var(--red)}.instrument-choice-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.instrument-choice{position:relative;display:flex;flex-direction:column;align-items:flex-start;gap:7px;border:1px solid var(--line);border-radius:14px;background:#ffffff05;padding:16px;text-align:left;transition:.16s}.instrument-choice:hover{border-color:var(--line-strong)}.instrument-choice.selected{border-color:var(--accent-line);background:var(--accent-soft)}.instrument-choice-icon{display:grid;place-items:center;width:40px;height:40px;border-radius:11px;background:#ffffff0d;color:var(--accent);margin-bottom:3px}.instrument-choice strong{font-size:12.5px}.instrument-choice small{font-size:10px;color:var(--faint);line-height:1.5}.naming-choice{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.naming-option{position:relative;display:flex;flex-direction:column;align-items:flex-start;gap:5px;border:1px solid var(--line);border-radius:14px;background:#ffffff05;padding:15px;text-align:left;transition:.16s}.naming-option:hover{border-color:var(--line-strong)}.naming-option.selected{border-color:var(--accent-line);background:var(--accent-soft)}.naming-title{font-family:var(--serif);font-size:19px;line-height:1.1}.naming-example{font-size:11.5px;color:var(--accent);letter-spacing:.01em}.naming-option small{font-size:10px;line-height:1.45;color:var(--faint)}@media(max-width:640px){.naming-choice{grid-template-columns:1fr}}.choice-check{position:absolute;top:10px;right:10px;display:grid;place-items:center;width:19px;height:19px;border-radius:50%;background:var(--accent);color:#191307}.settings-note{font-size:11.5px;color:var(--faint);line-height:1.65;margin-top:14px}.timbre-row{display:flex;flex-direction:column;gap:8px}.timbre-card{display:flex;align-items:center;gap:8px;border:1px solid var(--line);border-radius:12px;padding:8px}.timbre-card.selected{border-color:var(--accent-line);background:var(--accent-soft)}.timbre-select{flex:1;display:flex;align-items:center;gap:10px;background:transparent;border:0;text-align:left;padding:4px}.timbre-select>span{display:flex;flex-direction:column;flex:1}.timbre-select strong{font-size:12px}.timbre-select small{font-size:9.5px;color:var(--faint)}.timbre-select svg:first-child{color:var(--accent)}.setting-rows{display:flex;flex-direction:column;margin-top:16px;border-top:1px solid var(--line)}.setting-row{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:13px 0;border-bottom:1px solid var(--line);cursor:pointer}.setting-row.static{cursor:default}.setting-row>span:first-child{display:flex;flex-direction:column;gap:2px}.setting-row strong{font-size:12px}.setting-row small{font-size:10px;color:var(--faint);line-height:1.5}.setting-value{display:inline-flex;align-items:center;gap:6px;font-size:12px;color:var(--accent);white-space:nowrap}.switch{appearance:none;width:40px;height:23px;border-radius:999px;background:#ffffff1a;border:1px solid var(--line);position:relative;transition:.18s;flex-shrink:0;cursor:pointer}.switch:after{content:"";position:absolute;top:2px;left:2px;width:17px;height:17px;border-radius:50%;background:#b9b3a7;transition:.18s}.switch:checked{background:var(--accent-soft);border-color:var(--accent-line)}.switch:checked:after{transform:translate(17px);background:var(--accent)}.goal-options{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}.goal-option{display:flex;flex-direction:column;align-items:center;gap:1px;border:1px solid var(--line);border-radius:11px;background:#ffffff05;padding:10px 6px;transition:.16s}.goal-option:hover{border-color:var(--line-strong)}.goal-option.selected{border-color:var(--accent-line);background:var(--accent-soft)}.goal-option strong{font-family:var(--serif);font-size:23px;font-weight:400}.goal-option span{font-size:8.5px;color:var(--faint)}.about-list{display:flex;flex-direction:column;gap:11px;margin-top:8px}.about-list>div{display:flex;align-items:center;gap:10px;font-size:11.5px;color:var(--muted)}.about-list svg{color:var(--accent);flex-shrink:0}.settings-fineprint{font-size:10px;color:var(--faint);border-top:1px solid var(--line);padding-top:12px;margin-top:16px;line-height:1.6}.danger-panel{grid-column:span 2}.danger-actions{display:grid;grid-template-columns:1fr 1fr;gap:24px}.danger-actions>div{display:flex;flex-direction:column;align-items:flex-start;gap:6px}.danger-actions strong{font-size:12.5px}.danger-actions p{font-size:10.5px;color:var(--faint);margin-bottom:4px}.empty-state{border:1px dashed var(--line-strong);border-radius:16px;padding:34px;text-align:center}.empty-state h3{margin-bottom:6px}.empty-state p{color:var(--muted);font-size:12.5px;margin-bottom:16px}.not-found{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:62vh;text-align:center}.not-found-mark{font-family:Noto Music;font-size:84px;color:var(--accent);opacity:.4;margin-bottom:10px}.not-found h1{margin:8px 0 10px}.not-found p{color:var(--muted);max-width:420px;margin-bottom:22px}@media(max-width:1180px){.hero{grid-template-columns:minmax(0,1fr) 350px;gap:30px;padding:38px}.quick-grid,.course-grid{grid-template-columns:1fr 1fr}.lesson-layout,.course-layout{grid-template-columns:minmax(0,1fr) 280px}}@media(max-width:1080px){.sidebar{display:none}.mobile-header{position:fixed;top:0;left:0;right:0;height:62px;z-index:50;display:flex;align-items:center;justify-content:space-between;padding:0 20px;background:#0b0c0fd1;border-bottom:1px solid var(--line);backdrop-filter:blur(16px)}.brand.compact{padding:0}.brand.compact .brand-mark{width:34px;height:34px;border-radius:10px}.brand.compact .brand-copy strong{font-size:19px}.mobile-header-stats{display:flex;align-items:center;gap:8px}.streak-chip,.xp-chip{display:inline-flex;align-items:center;gap:4px;border:1px solid var(--line);border-radius:999px;padding:4px 9px;font-size:10.5px;color:var(--muted)}.streak-chip svg{color:var(--accent)}.xp-chip{color:var(--faint)}.mobile-nav{position:fixed;bottom:0;left:0;right:0;z-index:50;display:grid;grid-template-columns:repeat(6,1fr);padding:8px 6px calc(8px + env(safe-area-inset-bottom));background:#0b0c0fe6;border-top:1px solid var(--line);backdrop-filter:blur(16px)}.mobile-link{display:flex;flex-direction:column;align-items:center;gap:3px;padding:3px 0;font-size:9px;color:var(--faint);border-radius:8px}.mobile-link.active{color:var(--accent)}.mobile-icon{position:relative;display:grid;place-items:center;width:30px;height:26px}.mobile-badge{position:absolute;top:1px;right:3px;width:6px;height:6px;border-radius:50%;background:var(--accent)}.main-content{margin-left:0;padding:84px 22px 100px}.page{max-width:1000px}.lesson-aside{display:none}.lesson-layout,.course-layout,.practice-layout,.trainer-layout{grid-template-columns:minmax(0,1fr)}.lesson-list-panel,.lesson-layout>*,.course-layout>*,.practice-layout>*,.trainer-layout>*{min-width:0}.course-side,.practice-side,.trainer-side{display:grid;grid-template-columns:1fr 1fr;gap:14px}.settings-grid{grid-template-columns:1fr}.danger-panel,.account-panel{grid-column:span 1}.sync-input-row{flex-direction:column}.sync-input{width:100%}.backup-row{flex-direction:column;align-items:flex-start}}@media(max-width:900px){.hero{grid-template-columns:1fr;gap:26px;padding:30px}.hero-side{max-width:460px}.stat-grid{grid-template-columns:1fr 1fr}.two-col{grid-template-columns:1fr}.page-header{flex-direction:column;align-items:flex-start;gap:20px}.header-stat{width:100%;border-left:0;border-top:1px solid var(--line);padding-left:0;padding-top:16px}.course-hero{flex-wrap:wrap;padding:26px}.course-hero-action{width:100%;flex-direction:row;justify-content:space-between;align-items:center;border-top:1px solid var(--line);padding-top:16px}.course-progress-ring{border-left:0;padding-left:0;flex-direction:row;align-items:center;gap:12px}.course-progress-ring .progress-track{width:120px}.level-heading{flex-wrap:wrap}.level-progress{width:100%;margin-left:50px;text-align:left}.settings-panel{padding:22px}}@media(max-width:720px){body{font-size:15px}.main-content{padding:78px 15px 96px}.hero{padding:24px;border-radius:22px}.hero h1{font-size:38px}.hero-meta{gap:10px 16px}.daily-main{gap:14px}.daily-card{padding:16px}.ring{width:100px;height:100px}.ring-inner strong{font-size:26px}.stat-grid{gap:8px}.stat-card{padding:12px;gap:9px}.stat-card small{display:none}.stat-icon{width:32px;height:32px;border-radius:9px}.stat-card strong{font-size:21px}.stat-card span{font-size:9px}.panel{padding:18px}.panel-head{flex-wrap:wrap;gap:8px 12px}.panel-head h2{font-size:23px}.continue-card{flex-wrap:wrap}.continue-card>.button{width:100%}.path-strip{grid-template-columns:1fr 1fr;gap:10px}.quick-grid{grid-template-columns:1fr}.starter-note{flex-wrap:wrap}.starter-note>.button{width:100%}.course-grid{grid-template-columns:1fr}.course-card{min-height:0}.page-header h1{font-size:37px}.course-side,.practice-side,.trainer-side{grid-template-columns:1fr}.course-hero-glyph{width:64px;height:64px;border-radius:17px;font-size:34px}.course-hero-copy h1{font-size:34px}.course-hero-action{flex-direction:column;align-items:stretch}.course-progress-ring{justify-content:space-between}.lesson-header{flex-direction:column;align-items:flex-start;gap:12px}.lesson-header-badge{display:none}.lesson-content{padding:22px 18px}.lesson-section{padding-bottom:24px;margin-bottom:24px}.section-heading h2{font-size:23px}.rich-text{font-size:14px}.notation-panel{padding:6px;margin:18px 0 6px}.lesson-instrument{padding:12px;margin:20px 0 8px}.lesson-instrument-top{flex-direction:column;gap:10px}.lesson-instrument-play{width:100%}.lesson-instrument-surface{padding:6px}.practice-banner{flex-direction:column;align-items:flex-start;padding:18px}.practice-banner .button{width:100%}.exercise-session{padding:15px;border-radius:16px}.session-head{flex-wrap:wrap}.session-head-right .topic-chip{display:none}.question-body{padding:18px 16px}.question-prompt{font-size:23px}.choice-grid{grid-template-columns:1fr}.feedback-panel{padding:16px}.session-summary{flex-direction:column;align-items:flex-start;gap:22px;padding:24px}.summary-ring{width:112px;height:112px}.summary-ring-inner strong{font-size:31px}.summary-copy h2{font-size:29px}.summary-stats{gap:24px}.lesson-pager{flex-direction:column}.pager-link,.pager-link.next{max-width:100%;text-align:left;margin-left:0}.practice-start,.trainer-start{flex-direction:column;align-items:stretch}.practice-start .button,.trainer-start .button{width:100%}.queue-strength{display:none}.topic-grid{grid-template-columns:1fr}.topic-card.mixed{grid-column:span 1}.difficulty-row{grid-template-columns:1fr}.difficulty-card{flex-direction:row;align-items:center;gap:8px}.difficulty-dot{margin-bottom:0}.difficulty-card small{margin-left:auto;text-align:right}.instrument-choice-grid{grid-template-columns:1fr}.settings-grid{gap:12px}.danger-actions{grid-template-columns:1fr;gap:18px}.danger-panel{grid-column:span 1}.goal-options{gap:6px}.practice-header-stat{width:100%}.practice-toast{flex-wrap:wrap}.practice-toast>.button{width:100%}.metronome-controls{flex-wrap:wrap}.metronome-controls .button{width:100%;margin-left:0;margin-top:4px}.fretboard{min-width:700px}.staff{min-height:110px}.breadcrumbs{margin-bottom:16px}.session-embed .exercise-session{padding:12px}.settings-level{width:100%}}@media(max-width:400px){.mobile-header-stats .xp-chip{display:none}.language-toggle.compact{padding:4px 8px}.hero h1{font-size:33px}.hero .button-row .button{width:100%}.daily-main{flex-direction:column;align-items:flex-start}.stat-grid{grid-template-columns:1fr}.stat-card small{display:block}.topic-grid{grid-template-columns:1fr}.summary-topics{gap:4px}}@media(max-width:360px){.hero h1{font-size:31px}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation-duration:.01ms!important;transition-duration:.01ms!important;scroll-behavior:auto!important}}.panel-note{color:var(--faint);font-size:10.5px;letter-spacing:.09em;text-transform:uppercase;white-space:nowrap}.tool-crosslink{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-top:22px;padding:18px 22px;border:1px dashed var(--line-strong);border-radius:var(--radius);background:#ffffff04}.tool-crosslink strong{font-family:var(--serif);font-size:19px;font-weight:400}.tool-crosslink p{color:var(--muted);font-size:12.5px;margin-top:3px}.metronome-more{display:inline-flex;align-items:center;gap:5px;margin-top:10px;color:var(--accent);font-size:11px;font-weight:650}.metronome-dock{position:fixed;right:24px;bottom:24px;z-index:45;width:238px;border:1px solid var(--line-strong);border-radius:16px;background:#13161cf0;box-shadow:0 18px 44px #0000006b;backdrop-filter:blur(16px);padding:12px;transition:border-color .2s,box-shadow .2s,bottom .25s cubic-bezier(.22,.8,.24,1)}.metronome-dock.running{border-color:var(--accent-line);box-shadow:0 18px 44px #0000006b,0 0 0 1px #e8b5681f}.metronome-dock.collapsed{width:auto;padding:0;border:0;background:transparent;box-shadow:none;backdrop-filter:none}.metronome-dock-head{display:flex;align-items:center;justify-content:space-between;gap:8px;margin-bottom:8px}.metronome-dock-title{display:inline-flex;align-items:center;gap:6px;color:var(--muted);font-size:10.5px;letter-spacing:.08em;text-transform:uppercase}.metronome-dock-title svg{color:var(--accent)}.metronome-dock-head-actions{display:flex;align-items:center;gap:2px}.metronome-dock-icon{display:grid;place-items:center;width:28px;height:28px;border-radius:8px;border:0;background:transparent;color:var(--muted);transition:.15s}.metronome-dock-icon:hover{background:#ffffff0f;color:var(--text)}.metronome-dock-main{display:flex;align-items:center;justify-content:space-between;gap:10px}.metronome-dock-tempo{display:grid;grid-template-columns:auto auto;align-items:baseline;column-gap:4px}.metronome-dock-tempo strong{font-family:var(--serif);font-size:30px;font-weight:400;line-height:1}.metronome-dock-tempo>span{font-size:8.5px;color:var(--faint)}.metronome-dock-tempo small{grid-column:span 2;color:var(--faint);font-size:9.5px;margin-top:2px}.metronome-dock-main .metronome-beats{flex-wrap:wrap;justify-content:flex-end;max-width:100px}.metronome-dock-controls{display:flex;align-items:center;justify-content:center;gap:8px;margin-top:10px}.metronome-dock-play{display:inline-flex;align-items:center;justify-content:center;width:38px;height:38px;border:0;border-radius:50%;background:linear-gradient(180deg,var(--accent-bright),var(--accent));color:#1b1408;transition:transform .15s,filter .15s}.metronome-dock-play:hover{transform:scale(1.05)}.metronome-dock-play.stop{background:#ffffff17;border:1px solid var(--line-strong);color:var(--text)}.metronome-dock-fab{position:relative;display:flex;align-items:center;gap:7px;padding:11px 14px;border:1px solid var(--line-strong);border-radius:999px;background:#13161cf0;color:var(--accent);box-shadow:0 14px 34px #0006;backdrop-filter:blur(16px);transition:transform .15s,border-color .2s}.metronome-dock-fab:hover{transform:translateY(-1px);border-color:var(--accent-line)}.metronome-dock-fab-bpm{font-family:var(--serif);font-size:16px;color:var(--text)}.metronome-dock-pulse{position:absolute;inset:-4px;border-radius:999px;border:1px solid var(--accent-line);opacity:0;pointer-events:none}.metronome-dock-pulse.on{animation:dock-pulse .45s ease-out}@keyframes dock-pulse{0%{opacity:.8;transform:scale(.94)}to{opacity:0;transform:scale(1.14)}}.metronome-stage{padding:28px 30px}.metronome-stage-visual{display:flex;align-items:center;gap:34px;padding-bottom:20px;border-bottom:1px solid var(--line)}.metronome-figure{width:clamp(148px,16vw,188px);height:auto;flex-shrink:0;overflow:visible;filter:drop-shadow(0 18px 26px rgba(0,0,0,.35));transition:filter .18s ease}.metronome-figure.accented{filter:drop-shadow(0 18px 26px rgba(0,0,0,.35)) drop-shadow(0 0 12px rgba(232,181,104,.22))}.metronome-figure-rod{transform-box:view-box;transform-origin:110px 250px;transform:rotate(0)}.metronome-figure.running .metronome-figure-rod{animation-name:metronome-swing;animation-timing-function:ease-in-out;animation-iteration-count:infinite;animation-direction:alternate}.metronome-figure-weight{transition:transform .28s cubic-bezier(.22,.8,.24,1)}@keyframes metronome-swing{0%{transform:rotate(-16deg)}to{transform:rotate(16deg)}}@media(prefers-reduced-motion:reduce){.metronome-figure.running .metronome-figure-rod{animation:none!important;transform:rotate(0)}}.metronome-stage-tempo{display:flex;align-items:baseline;gap:8px}.metronome-stage-tempo strong{font-family:var(--serif);font-size:clamp(58px,9vw,96px);font-weight:400;line-height:.9;letter-spacing:-.02em}.metronome-stage-tempo span{color:var(--faint);font-size:12px;letter-spacing:.12em}.metronome-stage-beats{display:flex;flex-wrap:wrap;gap:8px;margin-left:auto;max-width:280px;justify-content:flex-end}.metronome-stage-beat{display:grid;place-items:center;width:34px;height:34px;border-radius:50%;border:1px solid var(--line);color:var(--faint);font-size:11px;transition:.12s}.metronome-stage-beat.strong{border-color:var(--accent-line);color:var(--muted)}.metronome-stage-beat.active{background:var(--accent);border-color:var(--accent);color:#1b1408;transform:scale(1.1)}.metronome-stage-controls{display:flex;align-items:center;justify-content:center;gap:18px;padding:24px 0 18px}.icon-button.big{width:44px;height:44px;font-size:20px}.metronome-play{display:inline-flex;align-items:center;justify-content:center;gap:9px;min-width:168px;padding:15px 26px;border:0;border-radius:999px;background:linear-gradient(180deg,var(--accent-bright),var(--accent));color:#1b1408;font-size:14px;font-weight:700;box-shadow:0 10px 30px #e8b56838;transition:transform .16s}.metronome-play:hover{transform:translateY(-1px)}.metronome-play.stop{background:#ffffff0f;border:1px solid var(--line-strong);color:var(--text);box-shadow:none}.metronome-tempo-row{display:grid;gap:10px}.metronome-tempo-row .bpm-slider{margin-top:0}.metronome-tempo-inputs{display:flex;gap:6px;justify-content:center}.metronome-tempo-inputs .button.active{color:var(--accent);background:var(--accent-soft)}.metronome-hint,.metronome-note{color:var(--faint);font-size:11.5px;line-height:1.6}.metronome-hint{text-align:center;margin-top:12px}.metronome-note{margin-top:12px}kbd{display:inline-block;min-width:18px;padding:1px 5px;border:1px solid var(--line-strong);border-bottom-width:2px;border-radius:5px;background:#ffffff0a;color:var(--muted);font-family:var(--sans);font-size:10px;text-align:center}.metronome-settings-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-top:18px}.metronome-option-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}.metronome-option{display:grid;gap:2px;padding:12px 8px;border:1px solid var(--line);border-radius:12px;background:#ffffff05;color:var(--muted);text-align:left;transition:.15s}.metronome-option strong{color:var(--text);font-size:14px}.metronome-option span{font-size:9.5px;letter-spacing:.07em;text-transform:uppercase;color:var(--faint)}.metronome-option:hover{border-color:var(--line-strong)}.metronome-option.active{border-color:var(--accent-line);background:var(--accent-soft)}.metronome-option.active strong{color:var(--accent)}.metronome-segmented{display:grid;grid-template-columns:repeat(3,1fr);gap:6px}.metronome-segmented button{display:grid;gap:2px;padding:11px 6px;border:1px solid var(--line);border-radius:10px;background:transparent;color:var(--muted);text-align:center;transition:.15s}.metronome-segmented strong{font-family:var(--serif);font-size:20px;font-weight:400}.metronome-segmented span{font-size:9px;letter-spacing:.05em;text-transform:uppercase;color:var(--faint)}.metronome-segmented button.active{border-color:var(--accent-line);background:var(--accent-soft);color:var(--accent)}.metronome-switch{display:flex;align-items:center;justify-content:space-between;gap:18px;margin-top:16px;padding-top:15px;border-top:1px solid var(--line);cursor:pointer}.metronome-switch strong{display:block;font-size:13px;font-weight:600}.metronome-switch small{display:block;margin-top:2px;color:var(--faint);font-size:11px}.metronome-switch input{width:38px;height:21px;appearance:none;border-radius:999px;border:1px solid var(--line-strong);background:#ffffff0f;position:relative;cursor:pointer;transition:.18s;flex-shrink:0}.metronome-switch input:after{content:"";position:absolute;top:2px;left:2px;width:15px;height:15px;border-radius:50%;background:var(--muted);transition:.18s}.metronome-switch input:checked{background:var(--accent-soft);border-color:var(--accent-line)}.metronome-switch input:checked:after{transform:translate(16px);background:var(--accent)}.metronome-tap{display:inline-flex;align-items:center;justify-content:center;gap:9px;width:100%;padding:18px;border:1px dashed var(--line-strong);border-radius:12px;background:#ffffff05;color:var(--text);font-size:13.5px;font-weight:650;transition:.15s}.metronome-tap:hover{border-color:var(--accent-line);background:var(--accent-soft);color:var(--accent)}.tools-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}.tool-card{display:flex;flex-direction:column;gap:8px;padding:30px;border:1px solid var(--line);border-radius:var(--radius-lg);background:radial-gradient(540px 260px at 100% 0%,rgba(232,181,104,.09),transparent 60%),linear-gradient(180deg,#ffffff07,#ffffff01);color:var(--text);transition:transform .2s,border-color .2s}.tool-card:hover{transform:translateY(-2px);border-color:var(--accent-line)}.tool-card-glyph{display:grid;place-items:center;width:58px;height:58px;margin-bottom:10px;border-radius:16px;border:1px solid var(--accent-line);background:var(--accent-soft);color:var(--accent)}.tool-card-eyebrow{color:var(--faint);font-size:10px;letter-spacing:.14em;text-transform:uppercase}.tool-card h2{font-size:26px}.tool-card>p{color:var(--muted);font-size:13px;line-height:1.65}.tool-card ul{display:grid;gap:6px;margin-top:8px;list-style:none}.tool-card li{display:flex;align-items:center;gap:8px;color:var(--muted);font-size:12px}.tool-card li svg{color:var(--green);flex-shrink:0}.tool-card-open{display:inline-flex;align-items:center;gap:6px;margin-top:auto;padding-top:20px;color:var(--accent);font-size:12.5px;font-weight:650}.tools-tip{margin-top:20px}.tools-tip p{color:var(--muted);font-size:13px;line-height:1.7;max-width:860px}.tuner-stage{padding:28px 30px 24px}.tuner-stage.listening{border-color:var(--line-strong)}.tuner-stage.in-tune{border-color:#8fca9b61;box-shadow:0 0 0 1px #8fca9b14}.tuner-readout{display:flex;align-items:center;justify-content:space-between;gap:28px}.tuner-note-block{display:grid;gap:4px}.tuner-status-pill{display:inline-flex;align-items:center;gap:6px;justify-self:start;padding:4px 10px;border:1px solid var(--line);border-radius:999px;color:var(--faint);font-size:10px;letter-spacing:.08em;text-transform:uppercase}.tuner-status-pill.in-tune{border-color:#8fca9b59;background:var(--green-soft);color:var(--green)}.tuner-status-pill.close{border-color:var(--accent-line);background:var(--accent-soft);color:var(--accent)}.tuner-status-pill.off{border-color:#e8836f52;background:var(--red-soft);color:var(--red)}.tuner-note{font-family:var(--serif);font-size:clamp(68px,10vw,104px);font-weight:400;line-height:.95;letter-spacing:-.02em}.tuner-note.in-tune{color:var(--green)}.tuner-note.close{color:var(--accent)}.tuner-note.off{color:var(--red)}.tuner-note-sub{color:var(--muted);font-size:12px}.tuner-cents{display:grid;justify-items:end;gap:3px;text-align:right}.tuner-cents strong{font-family:var(--serif);font-size:42px;font-weight:400;line-height:1}.tuner-cents strong small{font-size:18px;color:var(--faint);margin-left:2px}.tuner-cents strong.in-tune{color:var(--green)}.tuner-cents strong.close{color:var(--accent)}.tuner-cents strong.off{color:var(--red)}.tuner-cents>span{color:var(--faint);font-size:11px}.tuner-gauge{margin:26px 0 6px}.tuner-gauge-labels{display:flex;justify-content:space-between;margin-bottom:6px;color:var(--faint);font-size:9.5px;letter-spacing:.06em}.tuner-gauge-track{position:relative;height:14px;border-radius:999px;border:1px solid var(--line);background:linear-gradient(90deg,#e8836f29,#ffffff0a 30%,#8fca9b33,#ffffff0a 70%,#e8836f29)}.tuner-gauge-zone{position:absolute;left:45%;width:10%;top:-3px;bottom:-3px;border-radius:999px;background:#8fca9b24;border:1px solid rgba(143,202,155,.24)}.tuner-gauge-center{position:absolute;left:50%;top:-6px;bottom:-6px;width:1px;background:var(--line-strong)}.tuner-needle{position:absolute;top:-7px;width:4px;height:26px;transform:translate(-50%);border-radius:3px;background:var(--muted);transition:left .08s linear,background .15s;box-shadow:0 0 12px #ffffff2e}.tuner-needle.in-tune{background:var(--green);box-shadow:0 0 16px #8fca9b8c}.tuner-needle.close{background:var(--accent);box-shadow:0 0 14px #e8b56873}.tuner-needle.off{background:var(--red)}.tuner-gauge-leds{display:flex;justify-content:center;gap:8px;margin-top:12px}.tuner-led{width:7px;height:7px;border-radius:50%;background:#ffffff17;transition:.15s}.tuner-led.warm{background:#e8b56880}.tuner-led.on{background:var(--green);box-shadow:0 0 10px #8fca9b99}.tuner-actions{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-top:20px;padding-top:20px;border-top:1px solid var(--line)}.tuner-listen{min-width:172px}.tuner-note-line{margin-top:14px;color:var(--faint);font-size:11px;line-height:1.6}.tuner-error{margin-top:14px;padding:10px 13px;border:1px solid rgba(232,131,111,.3);border-radius:10px;background:var(--red-soft);color:var(--red);font-size:12px;line-height:1.55}.tuner-controls{display:grid;grid-template-columns:1.05fr .95fr;gap:18px;margin-top:18px}.tuner-instruments{display:grid;grid-template-columns:repeat(2,1fr);gap:6px;margin-bottom:18px}.tuner-instrument{display:grid;gap:1px;padding:9px 11px;border:1px solid var(--line);border-radius:10px;background:#ffffff05;color:var(--text);text-align:left;transition:.15s}.tuner-instrument span{font-size:12px;font-weight:600}.tuner-instrument small{color:var(--faint);font-size:9px;letter-spacing:.06em;text-transform:uppercase}.tuner-instrument:hover{border-color:var(--line-strong)}.tuner-instrument.active{border-color:var(--accent-line);background:var(--accent-soft)}.tuner-instrument.active span{color:var(--accent)}.tuner-field{display:grid;gap:6px;padding-top:16px;border-top:1px solid var(--line)}.tuner-field label{color:var(--faint);font-size:10px;letter-spacing:.1em;text-transform:uppercase}.tuner-select{width:100%;padding:10px 12px;border:1px solid var(--line-strong);border-radius:10px;background:var(--panel-2);color:var(--text);font-size:13px}.tuner-select:focus{outline:none;border-color:var(--accent-line)}.tuner-fixed-value{padding:10px 12px;border:1px dashed var(--line-strong);border-radius:10px;color:var(--muted);font-size:12.5px}.tuner-string-list{display:grid;gap:5px}.tuner-string{display:flex;align-items:stretch;gap:4px;border:1px solid var(--line);border-radius:10px;background:#ffffff05;overflow:hidden;transition:.15s}.tuner-string:hover{border-color:var(--line-strong)}.tuner-string.selected{border-color:var(--accent-line);background:var(--accent-soft)}.tuner-string.heard{border-color:#8fca9b66;box-shadow:inset 3px 0 0 var(--green)}.tuner-string-main{display:grid;grid-template-columns:34px 58px 1fr;align-items:center;gap:8px;flex:1;padding:8px 10px;border:0;background:transparent;color:var(--text);text-align:left}.tuner-string-index{color:var(--faint);font-size:9.5px;letter-spacing:.05em;text-transform:uppercase}.tuner-string-main strong{font-family:var(--serif);font-size:19px;font-weight:400}.tuner-string-main small{color:var(--faint);font-size:10.5px;text-align:right}.tuner-string-play{display:grid;place-items:center;width:38px;border:0;border-left:1px solid var(--line);background:transparent;color:var(--faint);transition:.15s}.tuner-string-play:hover{background:#ffffff0d;color:var(--accent)}.tuner-empty{color:var(--muted);font-size:12.5px;line-height:1.65}.tuner-mode{display:grid;grid-template-columns:repeat(3,1fr);gap:4px;margin-top:16px;padding-top:15px;border-top:1px solid var(--line)}.tuner-mode button{padding:8px 6px;border:1px solid var(--line);border-radius:9px;background:transparent;color:var(--muted);font-size:10.5px;font-weight:600;transition:.15s}.tuner-mode button:hover:not(:disabled){border-color:var(--line-strong);color:var(--text)}.tuner-mode button.active{border-color:var(--accent-line);background:var(--accent-soft);color:var(--accent)}.tuner-mode button:disabled{opacity:.3}.tuner-custom-panel{margin-top:18px}.tuner-custom-list{display:grid;gap:6px;margin-top:14px}.tuner-custom-row{display:grid;grid-template-columns:42px minmax(0,1fr) 86px 30px;align-items:center;gap:8px}.tuner-custom-row .tuner-select{padding:8px 10px}.tuner-custom-hz{color:var(--faint);font-size:10.5px;text-align:right}.tuner-custom-row .metronome-dock-icon:disabled{opacity:.25}.tuner-custom-actions{display:flex;gap:8px;flex-wrap:wrap;margin-top:14px}.tuner-reference-panel{margin-top:18px}.tuner-reference-row{display:flex;align-items:center;gap:18px}.tuner-reference-row .bpm-slider{margin-top:0}.tuner-reference-value{font-family:var(--serif);font-size:28px;font-weight:400;min-width:84px;text-align:right}.tuner-reference-presets{display:flex;gap:6px;margin-top:10px}.tuner-reference-presets .button.active{color:var(--accent);background:var(--accent-soft)}@media(max-width:1040px){.metronome-settings-grid,.tools-grid,.tuner-controls{grid-template-columns:1fr}.tuner-instruments{grid-template-columns:repeat(3,1fr)}}@media(max-width:760px){.metronome-dock{right:12px;bottom:calc(76px + env(safe-area-inset-bottom));width:min(264px,calc(100vw - 24px))}.metronome-stage-visual{flex-wrap:wrap;gap:18px}.metronome-stage-beats{margin-left:0;justify-content:flex-start;max-width:none}.tuner-readout{flex-direction:column;align-items:flex-start;gap:12px}.tuner-cents{justify-items:start;text-align:left}.tuner-actions .button{flex:1}.tool-crosslink{flex-direction:column;align-items:flex-start}}@media(max-width:560px){.metronome-stage,.tuner-stage{padding:20px 18px}.metronome-stage-tempo strong{font-size:64px}.metronome-figure{width:128px}.metronome-option-grid,.tuner-instruments{grid-template-columns:repeat(2,1fr)}.tuner-mode{grid-template-columns:1fr}.tuner-custom-row{grid-template-columns:36px minmax(0,1fr) 30px}.tuner-custom-hz{display:none}.tuner-reference-value{font-size:22px;min-width:66px}}@font-face{font-family:Vazirmatn;src:url(/fonts/Vazirmatn-Regular.woff2) format("woff2");font-weight:400;font-style:normal;font-display:swap;unicode-range:U+0600-06FF,U+0750-077F,U+08E3-08FF,U+200C-200E,U+2010-2011,U+204F,U+2E41,U+FB50-FDFF,U+FE70-FE74,U+FE76-FEFC}@font-face{font-family:Vazirmatn;src:url(/fonts/Vazirmatn-Medium.woff2) format("woff2");font-weight:500;font-style:normal;font-display:swap;unicode-range:U+0600-06FF,U+0750-077F,U+08E3-08FF,U+200C-200E,U+2010-2011,U+204F,U+2E41,U+FB50-FDFF,U+FE70-FE74,U+FE76-FEFC}@font-face{font-family:Vazirmatn;src:url(/fonts/Vazirmatn-Bold.woff2) format("woff2");font-weight:700;font-style:normal;font-display:swap;unicode-range:U+0600-06FF,U+0750-077F,U+08E3-08FF,U+200C-200E,U+2010-2011,U+204F,U+2E41,U+FB50-FDFF,U+FE70-FE74,U+FE76-FEFC}html.lang-fa{--serif: "Vazirmatn", "Iowan Old Style", "Palatino Linotype", Palatino, "Book Antiqua", Georgia, serif;--sans: "Vazirmatn", ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif}html.lang-fa body{font-size:14.5px;line-height:1.75}html.lang-fa h1,html.lang-fa h2,html.lang-fa h3{font-weight:500;letter-spacing:0;line-height:1.35}html.lang-fa h1{font-size:clamp(34px,3.8vw,48px)}html.lang-fa h2{font-size:clamp(21px,2.1vw,27px)}html.lang-fa h3{font-size:18px;line-height:1.5}html.lang-fa .hero h1{font-size:clamp(36px,3.9vw,49px)}html.lang-fa .hero h1 em{font-style:normal}html.lang-fa .lesson-header h1,html.lang-fa .course-hero-copy h1{font-size:clamp(32px,3.4vw,44px)}html.lang-fa .hero-lead,html.lang-fa .page-header p,html.lang-fa .lesson-header-main>p,html.lang-fa .course-hero-copy>p{font-size:13.5px;line-height:1.8}html.lang-fa .side-link{font-size:13.5px;font-weight:500}html.lang-fa .button{font-size:13px;font-weight:500}html.lang-fa .eyebrow{font-size:10px;font-weight:500;letter-spacing:0}html.lang-fa .brand-copy small{letter-spacing:0}html[dir=rtl] .sidebar{inset:0 0 0 auto;border-right:0;border-left:1px solid var(--line)}html[dir=rtl] .main-content{margin-left:0;margin-right:var(--sidebar)}html[dir=rtl] .nav-badge{margin-left:0;margin-right:auto}html[dir=rtl] .metronome-dock{right:auto;left:24px}html[dir=rtl] .install-prompt{direction:rtl}html[dir=rtl] .staff,html[dir=rtl] .piano,html[dir=rtl] .fretboard,html[dir=rtl] .rhythm-display,html[dir=rtl] .metronome-stage-visual,html[dir=rtl] .metronome-figure,html[dir=rtl] .tuner-gauge,html[dir=rtl] .lesson-notation,html[dir=rtl] .instrument-surface{direction:ltr}html[dir=rtl] .breadcrumbs>svg,html[dir=rtl] .pager-link svg,html[dir=rtl] .lesson-row-arrow,html[dir=rtl] .text-link svg,html[dir=rtl] .icon-link svg,html[dir=rtl] .tool-card-open svg,html[dir=rtl] .metronome-more svg{transform:scaleX(-1)}@media(max-width:1180px){html[dir=rtl] .course-progress-ring{border-left:0;padding-left:0}}@media(max-width:1080px){html[dir=rtl] .main-content{margin-right:0}html[dir=rtl] .level-progress{margin-left:0;margin-right:50px;text-align:right}html[dir=rtl] .header-stat,html[dir=rtl] .course-hero-action{border-left:0;padding-left:0}}@media(max-width:720px){html[dir=rtl] .difficulty-card small{margin-left:0;margin-right:auto;text-align:left}html[dir=rtl] .metronome-controls .button{margin-left:0}}html[dir=rtl] .tuner-cents,html[dir=rtl] .metronome-dock-tempo,html[dir=rtl] .bpm-display,html[dir=rtl] .tuner-custom-hz,html[dir=rtl] .tuner-string small{direction:ltr;unicode-bidi:isolate}