:root{--bg:#0f1115;--panel:#171a21;--panel2:#1e222b;--text:#e8e6e1;--muted:#9aa0aa;--line:#2b303b;--accent:#ff7a2f;--accent2:#ffc14d;--ok:#3ecf8e;--bad:#ff5d6c;--focus:#ffd28a;--radius:14px;color-scheme:dark}
@media (prefers-color-scheme:light){:root{--bg:#f7f4ee;--panel:#fff;--panel2:#f3efe7;--text:#1d1b18;--muted:#6b665d;--line:#e3ddd2;--accent:#e2560c;--accent2:#c98a00;--ok:#13895a;--bad:#c62f3d;--focus:#c25a00;color-scheme:light}}
*{box-sizing:border-box}html{font:16px/1.55 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif}
body{margin:0;background:var(--bg);color:var(--text);min-height:100vh;display:flex;flex-direction:column}
a{color:var(--accent)}a:hover{color:var(--accent2)}
:focus-visible{outline:3px solid var(--focus);outline-offset:2px;border-radius:6px}
.skip{position:absolute;left:-999px}.skip:focus{left:1rem;top:1rem;background:var(--panel);padding:.5rem 1rem;z-index:9}
header,footer,main{width:100%;max-width:760px;margin:0 auto;padding:0 1.25rem}
header{display:flex;align-items:center;justify-content:space-between;padding-top:1.25rem;padding-bottom:.5rem}
.brand{display:flex;align-items:center;gap:.55rem;font-weight:750;font-size:1.2rem;color:var(--text);text-decoration:none;letter-spacing:-.01em}
.brand svg{width:28px;height:28px}
nav a{color:var(--muted);text-decoration:none;margin-left:1rem;font-size:.95rem}nav a:hover{color:var(--text)}
h1{font-size:clamp(1.7rem,4.5vw,2.4rem);line-height:1.15;letter-spacing:-.02em;margin:1.4rem 0 .4rem}
.lead{color:var(--muted);margin:0 0 1.4rem;font-size:1.06rem}
.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:1.25rem;margin-bottom:1.25rem;position:relative}
label{display:block;font-weight:600;margin:0 0 .35rem}
textarea,input[type=password],input[type=text],select{width:100%;background:var(--panel2);color:var(--text);border:1px solid var(--line);border-radius:10px;padding:.7rem .8rem;font:inherit}
textarea{min-height:220px;resize:vertical;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:.93rem}
.row{display:grid;grid-template-columns:1fr 1fr;gap:1rem;margin-top:1rem}@media (max-width:560px){.row{grid-template-columns:1fr}}
.check{display:flex;gap:.6rem;align-items:flex-start;font-weight:500;margin-top:1rem}.check input{margin-top:.3rem;width:1.1rem;height:1.1rem;accent-color:var(--accent)}
.hint{color:var(--muted);font-size:.88rem;margin:.3rem 0 0}
.meter{display:flex;justify-content:space-between;color:var(--muted);font-size:.85rem;margin-top:.35rem}.meter .over{color:var(--bad);font-weight:600}
.btns{display:flex;flex-wrap:wrap;gap:.6rem;margin-top:1.1rem}
button,.btn{appearance:none;border:1px solid var(--line);background:var(--panel2);color:var(--text);font:inherit;font-weight:600;padding:.65rem 1.05rem;border-radius:10px;cursor:pointer;text-decoration:none;display:inline-flex;align-items:center;gap:.45rem}
button:hover{border-color:var(--muted)}button[disabled]{opacity:.55;cursor:not-allowed}
.primary{background:linear-gradient(135deg,var(--accent),var(--accent2));border-color:transparent;color:#1a0f05}
.primary:hover{filter:brightness(1.06)}
.danger{color:var(--bad)}
.status{min-height:1.4em;margin:.8rem 0 0;font-size:.95rem}.status.err{color:var(--bad)}.status.ok{color:var(--ok)}
.linkbox{display:flex;gap:.5rem}.linkbox input{font-family:ui-monospace,monospace;font-size:.88rem}
.hidden{display:none!important}
.badge{display:inline-block;font-size:.8rem;font-weight:650;padding:.15rem .55rem;border-radius:99px;background:var(--panel2);border:1px solid var(--line);color:var(--muted);margin-right:.35rem}
.badge.hot{color:var(--accent);border-color:var(--accent)}
pre.note{white-space:pre-wrap;word-break:break-word;background:var(--panel2);border:1px solid var(--line);border-radius:10px;padding:1rem;margin:0;max-height:60vh;overflow:auto;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:.93rem}
/* the fuse */
.fuse{margin:1rem 0 .2rem;height:10px;background:var(--panel2);border:1px solid var(--line);border-radius:99px;position:relative;overflow:visible}
.fuse .rope{position:absolute;left:0;top:0;bottom:0;border-radius:99px;background:repeating-linear-gradient(45deg,#a0703a 0 6px,#7a5129 6px 12px);width:100%;transition:width 1s linear}
.fuse .spark{position:absolute;top:50%;width:18px;height:18px;margin:-9px 0 0 -9px;border-radius:50%;background:radial-gradient(circle,#fff 0 20%,var(--accent2) 35%,var(--accent) 60%,transparent 70%);box-shadow:0 0 14px 4px var(--accent);animation:flick .18s infinite alternate;transition:left 1s linear}
.fuse.paused .spark{animation:none;opacity:.5;box-shadow:none}
@keyframes flick{from{transform:scale(.8) rotate(0)}to{transform:scale(1.25) rotate(40deg)}}
.fuseinfo{display:flex;justify-content:space-between;color:var(--muted);font-size:.88rem}
/* explosion */
.boom-wrap{position:relative}
.shard{position:absolute;width:10px;height:10px;border-radius:2px;background:var(--accent);pointer-events:none;animation:fly .9s cubic-bezier(.15,.7,.3,1) forwards}
@keyframes fly{to{transform:translate(var(--dx),var(--dy)) rotate(var(--r));opacity:0}}
.flash{animation:flash .5s ease-out}@keyframes flash{0%{box-shadow:0 0 0 0 var(--accent2)}30%{box-shadow:0 0 60px 20px var(--accent)}100%{box-shadow:0 0 0 0 transparent}}
.smoke{text-align:center;padding:2rem 1rem}.smoke .big{font-size:3rem;line-height:1}
.steps{counter-reset:s;list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(3,1fr);gap:.9rem}@media (max-width:640px){.steps{grid-template-columns:1fr}}
.steps li{counter-increment:s;background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:1rem}
.steps li::before{content:counter(s);display:inline-grid;place-items:center;width:1.7rem;height:1.7rem;border-radius:50%;background:var(--accent);color:#1a0f05;font-weight:800;margin-bottom:.4rem}
.steps strong{display:block}
details{border-top:1px solid var(--line);padding:.7rem 0}details summary{cursor:pointer;font-weight:600}
.prose h2{font-size:1.3rem;margin:1.8rem 0 .5rem}.prose p,.prose li{color:var(--text)}
.stats{color:var(--muted);font-size:.9rem;text-align:center;margin:1rem 0}
code{font-family:ui-monospace,monospace;background:var(--panel2);padding:.05rem .3rem;border-radius:5px;font-size:.9em}
footer{margin-top:auto;padding-top:2rem;padding-bottom:1.5rem;color:var(--muted);font-size:.88rem;display:flex;gap:1rem;flex-wrap:wrap;justify-content:space-between}
footer a{color:var(--muted)}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}
.mt0{margin-top:0}.center{justify-content:center}
.family{flex-basis:100%;font-size:.85em;line-height:1.7}
.qrbox{margin-top:1rem;display:flex;gap:1rem;align-items:center;flex-wrap:wrap}.qr{width:min(240px,70vw);flex:none;border-radius:10px;overflow:hidden;border:1px solid var(--line)}.qr svg{display:block;width:100%;height:auto}.qrbox .hint{flex:1;min-width:200px;margin:0}

.modes{display:flex;gap:.35rem;margin:0 0 1.2rem;padding:.3rem;background:var(--panel2);border:1px solid var(--line);border-radius:12px}
.mode{flex:1;text-align:center;padding:.55rem .7rem;border-radius:9px;color:var(--muted);text-decoration:none;font-weight:650;font-size:.95rem}
.mode:hover{color:var(--text)}
.mode.on{background:var(--panel);color:var(--text);box-shadow:0 0 0 1px var(--line)}
.letterbox{display:flex;flex-direction:column;align-items:center;gap:.7rem;padding:1.2rem .5rem .2rem;color:var(--muted);text-align:center}
.letterbox .slot{width:min(280px,80%);height:20px;border-radius:8px;background:var(--panel2);border:2px solid var(--line);position:relative;overflow:hidden}
.letterbox .slot::after{content:"";position:absolute;left:10%;right:10%;top:50%;height:3px;border-radius:99px;background:var(--accent);opacity:.7;animation:peek 1.8s ease-in-out infinite}
@keyframes peek{0%,100%{transform:translateY(5px);opacity:.25}50%{transform:translateY(-3px);opacity:1}}
.twolink .linkbox{margin:.35rem 0 .2rem}
.twolink h3{font-size:1.02rem;margin:1.15rem 0 .35rem}
@media (max-width:560px){nav a{margin-left:.65rem;font-size:.88rem}}
@media (prefers-reduced-motion:reduce){.letterbox .slot::after{animation:none;opacity:.5}}
.track{list-style:none;display:flex;flex-wrap:wrap;gap:.4rem;padding:0;margin:0 0 1rem;counter-reset:t}
.track li{counter-increment:t;font-size:.88rem;color:var(--muted);border:1px dashed var(--line);border-radius:999px;padding:.25rem .7rem}
.track li::before{content:counter(t) ". "}.track li.on{color:var(--text);border-style:solid;border-color:var(--ok)}.track li.on::before{content:"✓ "}
.warnline{margin:.8rem 0 0;color:var(--muted);font-size:.94rem}
.preview{min-height:3rem;max-height:18rem;overflow:auto;white-space:pre-wrap;word-break:break-all}
.preview .g{color:var(--muted)}.preview .g.ghost,.preview .g.odd{color:var(--bad);background:color-mix(in srgb,var(--bad) 14%,transparent);border-radius:4px;padding:0 .15rem;font-size:.8em}
.facts{margin:.8rem 0 0;padding-left:1.2rem}.facts li{margin:.25rem 0}.facts .warn{color:var(--accent2)}.facts .good{color:var(--ok);list-style:none;margin-left:-1.2rem}
.btns.small button{font-size:.88rem;padding:.4rem .75rem}
@media (prefers-color-scheme:light){.facts .warn{color:#8a5a00}}