:root{
  --bg:#0b1118;--surface:#131c27;--surface2:#1a2533;--line:#243245;--fg:#e8eef4;--muted:#8a9bab;
  --accent:#19d3ff;--accent-fg:#04202c;--ok:#2ee27a;--warn:#ffb020;--bad:#ff6b6b;--radius:14px;
  color-scheme:dark;
}
@media (prefers-color-scheme:light){:root:not([data-theme="dark"]){
  --bg:#f3f6f9;--surface:#fff;--surface2:#eef2f6;--line:#d9e1ea;--fg:#0e1a26;--muted:#5b6b7a;
  --accent:#0a84c6;--accent-fg:#fff;--ok:#0f9d4f;--warn:#b86e00;--bad:#d03a3a;color-scheme:light}}
:root[data-theme="light"]{--bg:#f3f6f9;--surface:#fff;--surface2:#eef2f6;--line:#d9e1ea;--fg:#0e1a26;--muted:#5b6b7a;--accent:#0a84c6;--accent-fg:#fff;--ok:#0f9d4f;--warn:#b86e00;--bad:#d03a3a;color-scheme:light}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--fg);font:16px/1.5 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;min-height:100dvh}
h1,h2,h3{line-height:1.2;margin:0 0 .5em}h1{font-size:clamp(1.6rem,5vw,2.2rem)}h2{font-size:1.15rem}h3{font-size:1rem}
p{margin:.4em 0 1em}a{color:var(--accent)}
.muted{color:var(--muted)}.center{text-align:center}.small{font-size:.875rem}
.top{display:flex;align-items:center;justify-content:space-between;padding:12px 16px;max-width:880px;margin:0 auto}
.brand{display:inline-flex;align-items:center;gap:8px;color:var(--fg);text-decoration:none;font-weight:600;letter-spacing:.06em}
.brand img{display:block;height:30px;width:auto}
nav a,nav button{margin-left:12px}
main{max-width:880px;margin:0 auto;padding:8px 16px 96px;outline:none}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:18px;margin-bottom:16px}
.hero{text-align:center;padding:28px 0 12px}.hero p{max-width:34em;margin-inline:auto;color:var(--muted)}
.grid{display:grid;gap:12px}@media(min-width:640px){.grid.two{grid-template-columns:1fr 1fr}}
button,.btn{font:inherit;cursor:pointer;border-radius:12px;border:1px solid var(--line);background:var(--surface2);color:var(--fg);padding:12px 18px;min-height:44px;text-decoration:none;display:inline-flex;align-items:center;justify-content:center;gap:8px}
button:hover,.btn:hover{border-color:var(--accent)}
button:focus-visible,.btn:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,[role=tab]:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.primary{background:var(--accent);color:var(--accent-fg);border-color:transparent;font-weight:600}
.primary:disabled{opacity:.45;cursor:not-allowed}
.link{background:none;border:0;color:var(--accent);padding:8px 4px;min-height:0}
input,select,textarea{font:inherit;width:100%;padding:12px 14px;border-radius:10px;border:1px solid var(--line);background:var(--bg);color:var(--fg);min-height:44px}
label{display:block;font-size:.875rem;color:var(--muted);margin:12px 0 4px}
.row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}.row>.grow{flex:1;min-width:0}
.method{display:flex;gap:14px;align-items:flex-start;text-align:left;width:100%;padding:16px}
.method .ico{font-size:1.6rem;line-height:1}.method small{display:block;color:var(--muted);font-weight:400}
.method.best{border-color:var(--accent)}
.badge{font-size:.72rem;background:var(--accent);color:var(--accent-fg);border-radius:99px;padding:2px 8px;margin-left:6px;vertical-align:middle}
.steps{display:flex;gap:6px;margin:4px 0 18px}.steps i{flex:1;height:4px;border-radius:2px;background:var(--line)}.steps i.on{background:var(--accent)}
.net{display:flex;justify-content:space-between;align-items:center;width:100%;text-align:left;border-radius:10px;border:0;background:none;padding:12px;min-height:48px}
.net:hover{background:var(--surface2)}.list{border:1px solid var(--line);border-radius:12px;overflow:hidden;margin:8px 0}.list .net+.net{border-top:1px solid var(--line);border-radius:0}
.bars{display:inline-flex;align-items:flex-end;gap:2px;height:16px}.bars i{width:4px;background:var(--muted);opacity:.3;border-radius:1px}.bars i.on{background:var(--accent);opacity:1}
.msg{padding:12px 14px;border-radius:10px;margin:12px 0;font-size:.95rem}.msg.err{background:color-mix(in srgb,var(--bad) 14%,transparent);color:var(--bad)}.msg.ok{background:color-mix(in srgb,var(--ok) 14%,transparent);color:var(--ok)}.msg.info{background:var(--surface2)}
.spin{width:22px;height:22px;border:3px solid var(--line);border-top-color:var(--accent);border-radius:50%;animation:sp 1s linear infinite;display:inline-block}
@keyframes sp{to{transform:rotate(360deg)}}@media(prefers-reduced-motion:reduce){.spin{animation-duration:3s}}
.code{font:700 2.4rem ui-monospace,Menlo,monospace;letter-spacing:.2em;text-align:center}
.tabs{display:flex;gap:4px;border-bottom:1px solid var(--line);margin-bottom:14px;overflow-x:auto}
[role=tab]{background:none;border:0;border-bottom:2px solid transparent;border-radius:0;padding:10px 14px;color:var(--muted);white-space:nowrap}
[role=tab][aria-selected=true]{color:var(--fg);border-bottom-color:var(--accent)}
#map{height:300px;border-radius:12px;border:1px solid var(--line);margin:12px 0;z-index:0}
.status{display:inline-flex;align-items:center;gap:8px;padding:6px 12px;border-radius:99px;background:var(--surface2);font-size:.9rem}
.dot{width:9px;height:9px;border-radius:50%;background:var(--muted)}.dot.on{background:var(--ok)}.dot.off{background:var(--bad)}
.savebar{position:fixed;left:0;right:0;bottom:0;background:var(--surface);border-top:1px solid var(--line);padding:12px 16px calc(12px + env(safe-area-inset-bottom));z-index:500}
.savebar .in{max-width:880px;margin:0 auto;display:flex;gap:12px;align-items:center;justify-content:space-between}
.swatch{display:flex;gap:10px;flex-wrap:wrap}.swatch label{margin:0;color:var(--fg);display:inline-flex;align-items:center;gap:8px;border:1px solid var(--line);border-radius:12px;padding:10px 14px;cursor:pointer;min-height:44px}
.swatch input{width:auto;min-height:0}.swatch label:has(input:checked){border-color:var(--accent)}
.chip{width:14px;height:14px;border-radius:50%;display:inline-block}
input[type=range]{padding:0;accent-color:var(--accent)}
.toast{position:fixed;left:50%;bottom:90px;transform:translate(-50%,20px);background:var(--fg);color:var(--bg);padding:10px 16px;border-radius:99px;opacity:0;pointer-events:none;transition:.25s;z-index:900;max-width:90vw}
.toast.show{opacity:1;transform:translate(-50%,0)}
.illus{display:block;margin:0 auto 12px;max-width:260px;width:100%;color:var(--accent)}
.kv{display:grid;grid-template-columns:auto 1fr;gap:6px 16px;font-size:.95rem}.kv dt{color:var(--muted)}.kv dd{margin:0;text-align:right}
details summary{cursor:pointer;color:var(--muted);padding:6px 0}