:root{--bg: #f5f7fa;--surface: #ffffff;--surface-2: #eef2f6;--text: #0f1726;--muted: #566173;--line: #e1e6ed;--brand: #0b7a65;--brand-ink: #ffffff;--brand-soft: #e2f3ee;--signal: #f5a524;--signal-ink: #1d1300;--console: #0e1726;--console-2: #182436;--console-text: #d7e0ec;--console-dim: #5f6f86;--console-muted: #93a3b8;--field: #7d8899;--warn: #9a5b00;--danger: #b42318;--radius: 14px;--shadow: 0 1px 2px rgba(16, 24, 40, .06), 0 8px 24px rgba(16, 24, 40, .06);--mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;--sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;color-scheme:light}@media(prefers-color-scheme:dark){:root:not([data-theme=light]){--bg: #0b1018;--surface: #121a25;--surface-2: #19232f;--text: #e8edf3;--muted: #9aa6b8;--line: #243142;--brand: #3fd1ae;--brand-ink: #062019;--brand-soft: #123128;--console: #070c13;--console-2: #111a26;--field: #66778d;--warn: #f2b95c;--danger: #ff8a7a;--shadow: 0 1px 2px rgba(0, 0, 0, .4), 0 8px 24px rgba(0, 0, 0, .3);color-scheme:dark}}:root[data-theme=dark]{--bg: #0b1018;--surface: #121a25;--surface-2: #19232f;--text: #e8edf3;--muted: #9aa6b8;--line: #243142;--brand: #3fd1ae;--brand-ink: #062019;--brand-soft: #123128;--console: #070c13;--console-2: #111a26;--field: #66778d;--warn: #f2b95c;--danger: #ff8a7a;--shadow: 0 1px 2px rgba(0, 0, 0, .4), 0 8px 24px rgba(0, 0, 0, .3);color-scheme:dark}*{box-sizing:border-box}[hidden]{display:none!important}.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}html{-webkit-text-size-adjust:100%;scroll-padding-top:72px}body{margin:0;background:var(--bg);color:var(--text);font:17px/1.65 var(--sans);-webkit-font-smoothing:antialiased}a{color:var(--brand);text-underline-offset:2px}img{max-width:100%}.wrap{max-width:1040px;margin:0 auto;padding:0 16px}.prose{max-width:760px}header.site{position:sticky;top:0;z-index:50;background:color-mix(in srgb,var(--surface) 88%,transparent);backdrop-filter:saturate(1.4) blur(10px);-webkit-backdrop-filter:saturate(1.4) blur(10px);border-bottom:1px solid var(--line)}header.site .bar{display:flex;align-items:center;gap:12px;height:60px}.logo{font-weight:800;font-size:1.12rem;color:var(--text);text-decoration:none;display:flex;align-items:center;gap:10px;letter-spacing:-.01em;white-space:nowrap}.logo svg{flex:none}nav.main{display:flex;gap:2px;margin-left:auto}nav.main a{color:var(--muted);text-decoration:none;font-size:.94rem;font-weight:500;padding:7px 10px;border-radius:8px}nav.main a:hover{color:var(--text);background:var(--surface-2)}nav.main a[aria-current=page]{color:var(--brand);background:var(--brand-soft)}.icon-btn{width:40px;height:40px;padding:0;justify-content:center;border-radius:10px;flex:none}.menu-btn{display:none}@media(max-width:900px){nav.main{display:none;position:absolute;left:0;right:0;top:60px;flex-direction:column;gap:0;padding:8px 12px 14px;background:var(--surface);border-bottom:1px solid var(--line);box-shadow:var(--shadow)}nav.main.open{display:flex}nav.main a{padding:12px 10px;font-size:1rem}.menu-btn{display:inline-flex;margin-left:auto}}main{padding:18px 0 56px}h1{font-size:clamp(1.7rem,4.6vw,2.6rem);line-height:1.15;margin:6px 0;letter-spacing:-.02em}h2{font-size:clamp(1.25rem,2.6vw,1.55rem);margin:44px 0 10px;line-height:1.3;letter-spacing:-.01em}h3{font-size:1.1rem;margin:26px 0 6px}.lead{color:var(--muted);font-size:1.05rem;margin:0 0 16px;max-width:760px}.badges{display:flex;flex-wrap:wrap;gap:6px;margin:0 0 16px;padding:0;list-style:none}.badges li{font-size:.8rem;font-weight:600;color:var(--brand);background:var(--brand-soft);padding:3px 10px;border-radius:999px}@media(max-width:600px){.lead{font-size:.98rem;margin-bottom:12px}.badges{display:none}main{padding-top:10px}}.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:16px;box-shadow:var(--shadow)}.mono{font-family:var(--mono)}button,.btn{font:inherit;font-size:.93rem;font-weight:600;border:1px solid var(--line);background:var(--surface);color:var(--text);border-radius:10px;min-height:40px;padding:8px 14px;cursor:pointer;text-decoration:none;display:inline-flex;align-items:center;gap:7px;transition:background .15s,border-color .15s,transform .05s;-webkit-tap-highlight-color:transparent}button:hover,.btn:hover{border-color:color-mix(in srgb,var(--brand) 50%,var(--line))}button:active{transform:translateY(1px)}button.primary{background:var(--brand);color:var(--brand-ink);border-color:var(--brand)}button.primary:hover{filter:brightness(1.07)}button.ghost{background:transparent;border-color:transparent}button.ghost:hover{background:var(--surface-2)}button[aria-pressed=true]{background:var(--brand-soft);border-color:var(--brand);color:var(--brand)}button:disabled{opacity:.45;cursor:default}button svg,.btn svg{width:18px;height:18px;flex:none}:focus-visible{outline:2px solid var(--brand);outline-offset:2px}textarea,input[type=text],select{font:inherit;width:100%;background:var(--surface);color:var(--text);border:1px solid var(--field);border-radius:10px;padding:10px 12px}textarea:focus,input[type=text]:focus,select:focus{border-color:var(--brand);outline:none;box-shadow:0 0 0 3px color-mix(in srgb,var(--brand) 18%,transparent)}textarea{resize:vertical}label{font-size:.88rem;color:var(--muted)}::placeholder{color:var(--muted);opacity:1}input[type=range]{accent-color:var(--brand);width:100%}table{border-collapse:collapse;width:100%;background:var(--surface);border-radius:12px;overflow:hidden}th,td{text-align:left;padding:10px 12px;border-bottom:1px solid var(--line)}tr:last-child td{border-bottom:none}th{font-size:.82rem;color:var(--muted);font-weight:700;background:var(--surface-2);text-transform:uppercase;letter-spacing:.03em}.table-scroll{overflow-x:auto;border:1px solid var(--line);border-radius:12px}.grid-codes{display:grid;grid-template-columns:repeat(auto-fill,minmax(132px,1fr));gap:8px}.code-tile{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:10px 12px;display:flex;justify-content:space-between;align-items:center;gap:8px;cursor:pointer;font:inherit;color:var(--text);text-align:left;width:100%;min-height:52px}.code-tile:hover{border-color:var(--brand);background:var(--brand-soft)}.code-tile.playing{border-color:var(--signal);box-shadow:0 0 0 3px color-mix(in srgb,var(--signal) 35%,transparent)}.code-tile .ch{font-weight:800;font-size:1.25rem}.code-tile .cd{font-family:var(--mono);font-size:1.15rem;letter-spacing:2px;color:var(--muted)}.note{font-size:.88rem;color:var(--muted)}.warn{color:var(--warn);font-size:.88rem;margin:6px 0 0}.faq{margin:0}.faq details{border:1px solid var(--line);background:var(--surface);border-radius:12px;padding:0 16px;margin-bottom:8px}.faq summary{cursor:pointer;font-weight:700;padding:14px 0;list-style:none;display:flex;justify-content:space-between;gap:12px}.faq summary::-webkit-details-marker{display:none}.faq summary:after{content:"+";color:var(--brand);font-size:1.3rem;line-height:1}.faq details[open] summary:after{content:"−"}.faq details>div{padding:0 0 14px}.related{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:10px}.related a{display:block;padding:14px 16px;border:1px solid var(--line);border-radius:12px;background:var(--surface);text-decoration:none;color:var(--text);font-weight:700}.related a:hover{border-color:var(--brand)}.related a span{display:block;font-size:.86rem;color:var(--muted);font-weight:400}footer.site{border-top:1px solid var(--line);padding:28px 0 44px;font-size:.9rem;color:var(--muted);background:var(--surface)}footer.site nav{display:flex;flex-wrap:wrap;gap:8px 18px;margin-bottom:12px}footer.site a{color:var(--muted)}.big-morse{font-family:var(--mono);font-size:clamp(1.7rem,7vw,2.8rem);letter-spacing:3px;word-break:break-word}ol li,ul li{margin-bottom:4px}@media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}@media print{header.site,footer.site,.no-print{display:none!important}body{background:#fff;color:#000;font-size:12pt}.card{border:none;padding:0;box-shadow:none}}.lamp-overlay{position:fixed;inset:0;z-index:200;background:#000;color:#fff;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:24px;padding:24px;transition:background .02s}.lamp-overlay[hidden]{display:none}.lamp-overlay.on{background:#fff;color:#000}.lamp-letter{font:800 clamp(4rem,22vw,12rem)/1 var(--sans);min-height:1em;opacity:.25}.lamp-overlay.on .lamp-letter{opacity:.12}.lamp-hint{color:#c9c9c9;text-align:center;max-width:440px}.lamp-hint strong{color:#ffd27a}.lamp-overlay.on .lamp-hint{color:#222}.lamp-bar{position:absolute;bottom:max(20px,env(safe-area-inset-bottom));display:flex;flex-wrap:wrap;justify-content:center;gap:8px;padding:0 12px}.lamp-bar button{background:#1b1b1b;color:#fff;border-color:#333}.lamp-bar button.primary{background:var(--signal);color:var(--signal-ink);border-color:var(--signal)}.lamp-overlay.on .lamp-bar button{background:#eee;color:#000;border-color:#ccc}.skip[data-astro-cid-5hce7sga]{position:absolute;left:-9999px;top:8px;z-index:100;background:var(--surface);padding:8px 12px;border-radius:8px}.skip[data-astro-cid-5hce7sga]:focus{left:8px}