:root{--font-head:"Huninn", "Noto Sans TC", system-ui, sans-serif;--font-body:"Noto Sans TC", -apple-system, "PingFang TC", system-ui, sans-serif;--font-mono:"JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;--radius:12px;--radius-lg:18px;--hand:16px 20px 14px 22px / 20px 14px 22px 16px;--pad:clamp(16px, 4vw, 40px);--header-h:66px;--bg:#f7f8f5;--surface:#fff;--surface-2:#eceee9;--text:#1c1f24;--text-2:#3d424a;--muted:#6b717a;--line:#dde0da;--line-strong:#b9beb6;--accent:#1f5fd1;--accent-ink:#fff;--accent-soft:#e3ecfb;--cat-theory:#1f5fd1;--cat-fret:#17894a;--cat-tech:#d2392c;--cat-rhythm:#e07a10;--cat-gear:#7b3fc4;--shadow:0 1px 0 #0000000a, 0 8px 22px -10px #141e282e;color-scheme:light}:root[data-theme=dark]{--bg:#1e2622;--surface:#253029;--surface-2:#2e3a33;--text:#eef1ea;--text-2:#cbd3c8;--muted:#8e9a90;--line:#35423a;--line-strong:#4b5b51;--accent:#7eb0ff;--accent-ink:#0e1a2e;--accent-soft:#223449;--cat-theory:#7eb0ff;--cat-fret:#6fd39a;--cat-tech:#ff8a7a;--cat-rhythm:#ffb65c;--cat-gear:#c39bff;--shadow:none;color-scheme:dark}@media (prefers-color-scheme:dark){:root:not([data-theme=light]){--bg:#1e2622;--surface:#253029;--surface-2:#2e3a33;--text:#eef1ea;--text-2:#cbd3c8;--muted:#8e9a90;--line:#35423a;--line-strong:#4b5b51;--accent:#7eb0ff;--accent-ink:#0e1a2e;--accent-soft:#223449;--cat-theory:#7eb0ff;--cat-fret:#6fd39a;--cat-tech:#ff8a7a;--cat-rhythm:#ffb65c;--cat-gear:#c39bff;--shadow:none;color-scheme:dark}}[data-cat=theory]{--c:var(--cat-theory)}[data-cat=fret]{--c:var(--cat-fret)}[data-cat=tech]{--c:var(--cat-tech)}[data-cat=rhythm]{--c:var(--cat-rhythm)}[data-cat=gear]{--c:var(--cat-gear)}*,:before,:after{box-sizing:border-box}html{scroll-padding-top:calc(var(--header-h) + 60px);-webkit-text-size-adjust:100%}body{background:var(--bg);min-height:100vh;color:var(--text);font-family:var(--font-body);-webkit-font-smoothing:antialiased;flex-direction:column;margin:0;font-size:16px;line-height:1.75;display:flex}main{flex:1}img{max-width:100%;height:auto}[hidden]{display:none!important}a{color:var(--accent)}button{font:inherit;color:inherit}:focus-visible{outline:2.5px solid var(--accent);outline-offset:2px;border-radius:4px}.wrap{max-width:1100px;padding-inline:var(--pad);margin:0 auto}.sr-only{clip:rect(0 0 0 0);white-space:nowrap;width:1px;height:1px;position:absolute;overflow:hidden}h1,h2,h3{font-family:var(--font-head);letter-spacing:.01em;color:var(--text);font-weight:400}h1{text-wrap:balance;margin:0 0 16px;font-size:clamp(30px,5vw,50px);line-height:1.22}h2{margin:0;font-size:clamp(22px,2.8vw,28px);line-height:1.3}.kicker{font-family:var(--font-head);letter-spacing:.03em;color:var(--muted);margin:0 0 12px;font-size:15px}.lede{color:var(--text-2);max-width:34em;margin:0 0 20px;font-size:18px;line-height:1.7}@media (width<=760px){.lede{font-size:16.5px}}.mark{z-index:0;display:inline-block;position:relative}.mark:after{content:"";background:var(--accent);opacity:.85;z-index:-1;height:.26em;animation:.7s cubic-bezier(.6,0,.3,1) .4s both marker;position:absolute;bottom:-.1em;left:-.08em;right:-.08em;-webkit-mask:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 200 20' preserveAspectRatio='none'%3E%3Cpath d='M4 12 C 50 6, 120 5, 196 9' stroke='black' stroke-width='9' fill='none' stroke-linecap='round'/%3E%3C/svg%3E") 0 0/100% 100% no-repeat;mask:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 200 20' preserveAspectRatio='none'%3E%3Cpath d='M4 12 C 50 6, 120 5, 196 9' stroke='black' stroke-width='9' fill='none' stroke-linecap='round'/%3E%3C/svg%3E") 0 0/100% 100% no-repeat}@keyframes marker{0%{clip-path:inset(0 100% 0 0)}to{clip-path:inset(0)}}.logo{color:var(--text);display:block;overflow:visible}.logo.draw path{stroke-dasharray:1 2;stroke-dashoffset:1.01px}@keyframes draw{to{stroke-dashoffset:0}}@media (prefers-reduced-motion:reduce){*,:before,:after{transition:none!important;animation:none!important}.logo.draw path{stroke-dashoffset:0}}.chips{flex-wrap:wrap;gap:6px;display:flex}.chip{--c:var(--accent);color:color-mix(in srgb, var(--c) 80%, var(--text));background:color-mix(in srgb, var(--c) 11%, transparent);border:1px solid color-mix(in srgb, var(--c) 28%, transparent);white-space:nowrap;border-radius:999px;align-items:center;gap:6px;padding:6px 10px;font-size:13px;line-height:1;text-decoration:none;display:inline-flex}.chip:before{content:"";background:var(--c);border-radius:50%;width:6px;height:6px}a.chip:hover{background:color-mix(in srgb, var(--c) 18%, transparent)}.btn{white-space:nowrap;cursor:pointer;border:1px solid #0000;border-radius:999px;align-items:center;gap:6px;padding:10px 20px;font-size:15px;text-decoration:none;display:inline-flex}.btn.primary{background:var(--accent);color:var(--accent-ink);box-shadow:0 3px 0 color-mix(in srgb, var(--accent) 60%, #000)}.btn.primary:active{box-shadow:0 1px 0 color-mix(in srgb, var(--accent) 60%, #000);transform:translateY(2px)}.btn.ghost{border-color:var(--line-strong);color:var(--text);background:0 0}.btn.ghost:hover{border-color:var(--text)}.actions{flex-wrap:wrap;gap:10px;margin-top:26px;display:flex}.link{color:var(--accent);white-space:nowrap;font-size:14.5px;text-decoration:none}.link:hover{text-decoration:underline}.card{background:var(--surface);border:2px solid var(--line-strong);border-radius:var(--hand);box-shadow:var(--shadow);padding:20px 22px}.card-label{font-family:var(--font-head);letter-spacing:.04em;color:var(--muted);margin:0 0 12px;font-size:14px}.sec{padding-block:36px}.sec-head{flex-wrap:wrap;justify-content:space-between;align-items:baseline;gap:12px;margin-bottom:18px;display:flex}.sec-meta{color:var(--muted);white-space:nowrap;margin:0;font-size:14px}.month{font-family:var(--font-head);color:var(--accent);letter-spacing:.04em;margin:26px 0 10px;font-size:15px}.prose{counter-reset:exercise;min-width:0;max-width:720px}.prose>h2{margin:44px 0 14px}.prose>h2:first-child{margin-top:32px}.prose>h3{margin:28px 0 8px;font-size:20px}.prose p,.prose li{color:var(--text-2)}.prose p{margin:0 0 14px}.prose ul,.prose ol{margin:0 0 14px;padding-left:1.3em}.prose li{margin:4px 0}.prose strong{color:var(--text)}.prose code{font-family:var(--font-mono);background:var(--surface-2);border-radius:4px;padding:1px 5px;font-size:.9em}.prose img{border-radius:var(--radius)}.prose table{border-collapse:collapse;width:100%;margin:0 0 16px;font-size:15px;display:block;overflow-x:auto}.prose th,.prose td{border:1px solid var(--line);text-align:left;padding:8px 12px}.prose th{background:var(--surface-2);color:var(--text)}.figure{background:var(--surface);border:2px solid var(--line-strong);border-radius:var(--hand);box-shadow:var(--shadow);margin:18px 0;padding:16px 18px}.fig-head{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:10px;margin-bottom:10px;display:flex}.fig-title{color:var(--text);font-size:15px;font-weight:700}.fig-cap{color:var(--muted);margin:10px 0 0;font-size:13px;line-height:1.6}.toggle{border:1px solid var(--line);background:var(--bg);border-radius:999px;padding:2px;display:inline-flex}.toggle button{color:var(--muted);cursor:pointer;background:0 0;border:0;border-radius:999px;padding:4px 12px;font-size:13px}.toggle button[aria-pressed=true]{background:var(--text);color:var(--bg)}.dg{width:100%;height:auto;margin:auto;display:block}.dg .str{stroke:var(--muted)}.dg .fret{stroke:var(--line-strong);stroke-width:2px}.dg .nut{fill:var(--text-2)}.dg .inlay{fill:var(--line-strong);opacity:.7}.dg .lbl{fill:var(--muted);font:500 12px var(--font-mono)}.dg .note circle{fill:var(--text)}.dg .note text{fill:var(--bg);font:700 13px var(--font-body);text-anchor:middle;dominant-baseline:central}.dg .note.root circle{fill:var(--accent)}.dg .note.root text{fill:var(--accent-ink)}.dg .title{fill:var(--text);font:700 16px var(--font-body);text-anchor:middle}[data-label=name] .dg .t-iv,[data-label=interval] .dg .t-name{display:none}.hdr[data-astro-cid-nen7h5rs]{z-index:20;background:color-mix(in srgb, var(--bg) 86%, transparent);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--line);padding-top:env(safe-area-inset-top,0px);position:sticky;top:0}.hdr-in[data-astro-cid-nen7h5rs]{height:var(--header-h);align-items:center;gap:10px;display:flex}.brand[data-astro-cid-nen7h5rs]{color:var(--text);align-items:center;gap:12px;margin-right:auto;text-decoration:none;display:flex}.brand[data-astro-cid-nen7h5rs] .brand-logo{width:auto;height:42px}.brand-name[data-astro-cid-nen7h5rs]{font-family:var(--font-head);letter-spacing:.06em;border-left:1.5px solid var(--line-strong);white-space:nowrap;padding-left:12px;font-size:18px}.nav[data-astro-cid-nen7h5rs]{gap:2px;margin-right:6px;display:flex}.nav[data-astro-cid-nen7h5rs] a[data-astro-cid-nen7h5rs]{border-radius:var(--radius);color:var(--muted);white-space:nowrap;padding:6px 12px;font-size:15px;text-decoration:none}.nav[data-astro-cid-nen7h5rs] a[data-astro-cid-nen7h5rs]:hover{color:var(--text)}.nav[data-astro-cid-nen7h5rs] a[data-astro-cid-nen7h5rs][aria-current=page]{color:var(--text);background:var(--surface-2)}.icon-btn[data-astro-cid-nen7h5rs]{border:1px solid var(--line);background:var(--surface);height:38px;color:var(--muted);border-radius:var(--radius);cursor:pointer;white-space:nowrap;align-items:center;gap:8px;padding:0 10px;font-size:14px;display:inline-flex}.icon-btn[data-astro-cid-nen7h5rs]:hover{color:var(--text);border-color:var(--line-strong)}.icon-btn[data-astro-cid-nen7h5rs] svg[data-astro-cid-nen7h5rs]{flex:none;width:17px;height:17px}kbd[data-astro-cid-nen7h5rs]{font-family:var(--font-mono);border:1px solid var(--line);border-radius:4px;padding:1px 5px;font-size:11px}.i-sun[data-astro-cid-nen7h5rs]{display:none}:root[data-theme=dark] .i-sun[data-astro-cid-nen7h5rs]{display:block}:root[data-theme=dark] .i-moon[data-astro-cid-nen7h5rs]{display:none}@media (prefers-color-scheme:dark){:root:not([data-theme=light]) .i-sun[data-astro-cid-nen7h5rs]{display:block}:root:not([data-theme=light]) .i-moon[data-astro-cid-nen7h5rs]{display:none}}@media (width<=720px){.hdr-in[data-astro-cid-nen7h5rs]{gap:6px;height:60px}.brand[data-astro-cid-nen7h5rs]{gap:8px}.brand[data-astro-cid-nen7h5rs] .brand-logo{height:36px}.brand-name[data-astro-cid-nen7h5rs]{padding-left:8px;font-size:16px}.nav[data-astro-cid-nen7h5rs] a[data-astro-cid-nen7h5rs]{padding:6px 8px;font-size:14.5px}.search-label[data-astro-cid-nen7h5rs],kbd[data-astro-cid-nen7h5rs]{display:none}.icon-btn[data-astro-cid-nen7h5rs]{padding:0 9px}}@media (width<=420px){.theme-btn[data-astro-cid-nen7h5rs]{display:none}}@media (width<=340px){.brand-name[data-astro-cid-nen7h5rs]{display:none}}.ftr[data-astro-cid-jo6i4kqk]{border-top:1px solid var(--line);padding-block:28px calc(40px + env(safe-area-inset-bottom,0px));color:var(--muted);margin-top:56px;font-size:13.5px}.ftr-in[data-astro-cid-jo6i4kqk]{flex-wrap:wrap;align-items:center;gap:16px;display:flex}.ftr[data-astro-cid-jo6i4kqk] .ftr-logo{width:auto;height:32px;color:var(--muted)}.upd[data-astro-cid-jo6i4kqk]{margin-left:auto}.theme-link[data-astro-cid-jo6i4kqk]{color:var(--accent);cursor:pointer;background:0 0;border:0;padding:0;font-size:13.5px}@media (width<=560px){.upd[data-astro-cid-jo6i4kqk]{flex-basis:100%;margin-left:0}}.search[data-astro-cid-ac66eqjo]{border:1px solid var(--line-strong);border-radius:var(--radius-lg);background:var(--surface);width:min(640px,100vw - 24px);max-height:min(640px,100dvh - 24px);color:var(--text);margin:max(12px,10vh) auto auto;padding:0;overflow:hidden;box-shadow:0 24px 70px #00000059}.search[data-astro-cid-ac66eqjo][open]{flex-direction:column;display:flex}.search[data-astro-cid-ac66eqjo]::backdrop{backdrop-filter:blur(2px);background:#0a0c0e73}.search-in[data-astro-cid-ac66eqjo]{border-bottom:1px solid var(--line);align-items:center;gap:10px;padding:0 12px 0 16px;display:flex}.search-in[data-astro-cid-ac66eqjo] svg[data-astro-cid-ac66eqjo]{width:18px;height:18px;color:var(--muted);flex:none}.search-in[data-astro-cid-ac66eqjo] input[data-astro-cid-ac66eqjo]{min-width:0;color:var(--text);font:inherit;background:0 0;border:0;outline:0;flex:1;padding:16px 0;font-size:17px}.search-in[data-astro-cid-ac66eqjo] input[data-astro-cid-ac66eqjo]::-webkit-search-cancel-button{display:none}.close[data-astro-cid-ac66eqjo]{color:var(--accent);cursor:pointer;background:0 0;border:0;padding:8px;font-size:15px}.results[data-astro-cid-ac66eqjo]{flex:1;padding:8px;overflow:auto}.results[data-astro-cid-ac66eqjo] .rh{font-family:var(--font-head);color:var(--muted);margin:0;padding:8px 10px 4px;font-size:13.5px}.results[data-astro-cid-ac66eqjo] a{border-radius:var(--radius);color:var(--text);padding:10px;text-decoration:none;display:block}.results[data-astro-cid-ac66eqjo] a[aria-selected=true]{background:var(--surface-2)}.results[data-astro-cid-ac66eqjo] b{font-size:15.5px;font-weight:600;display:block}.results[data-astro-cid-ac66eqjo] .t{font-family:var(--font-head);color:var(--accent);margin-right:8px;font-size:13px;font-weight:400}.results[data-astro-cid-ac66eqjo] small{color:var(--muted);margin-top:2px;font-size:13px;line-height:1.55;display:block}.results[data-astro-cid-ac66eqjo] mark{background:var(--accent-soft);color:var(--accent);border-radius:3px;padding:0 1px}.results[data-astro-cid-ac66eqjo] .none{color:var(--muted);margin:0;padding:18px 10px}.foot[data-astro-cid-ac66eqjo]{border-top:1px solid var(--line);color:var(--muted);margin:0;padding:9px 16px;font-size:12.5px}@media (width<=720px){.foot[data-astro-cid-ac66eqjo]{display:none}}.skip{z-index:100;background:var(--text);color:var(--bg);border-radius:8px;padding:8px 14px;position:absolute;top:8px;left:-9999px}.skip:focus{left:8px}.logo-intro .brand-logo path{stroke-dasharray:1 2;stroke-dashoffset:1.01px}