:root{--bg:#f8fafc;--fg:#1f2937;--mut:#6b7280;--bd:#e5e7eb;--pr:#4f46e5;--card:#fff;--ok:#fff}
:root[data-theme=dark]{--bg:#0f172a;--fg:#e5e7eb;--mut:#9ca3af;--bd:#334155;--pr:#818cf8;--card:#1e293b;--ok:#0f172a}
@media(prefers-color-scheme:dark){:root:not([data-theme=light]){--bg:#0f172a;--fg:#e5e7eb;--mut:#9ca3af;--bd:#334155;--pr:#818cf8;--card:#1e293b;--ok:#0f172a}}
*{box-sizing:border-box}body{margin:0;font:16px/1.55 system-ui,-apple-system,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--fg)}
a{color:var(--pr)}main{max-width:1100px;margin:auto;padding:24px 16px;min-height:70vh}
.hd{position:sticky;top:0;z-index:5;display:flex;align-items:center;gap:8px;padding:10px 16px;background:var(--card);border-bottom:1px solid var(--bd)}
.logo{font-weight:800;letter-spacing:.08em;text-decoration:none;margin-right:auto}#nav{display:flex;gap:16px}#nav a{text-decoration:none;color:var(--fg)}#mb{display:none}
.ib,.btn{min-height:44px;padding:0 16px;border:1px solid var(--bd);border-radius:10px;background:var(--card);color:var(--fg);font:inherit;cursor:pointer;display:inline-flex;align-items:center;text-decoration:none}
.btn{background:var(--pr);color:var(--ok);border-color:var(--pr)}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:3px solid var(--pr);outline-offset:2px}
.hero{text-align:center;padding:40px 0}.hero h1{font-size:clamp(1.8rem,5vw,3rem);margin:0 0 8px}.hero p{color:var(--mut)}
input,select,textarea{width:100%;min-height:44px;padding:8px 12px;border:1px solid var(--bd);border-radius:10px;background:var(--card);color:var(--fg);font:inherit}
input[type=checkbox]{width:auto;min-height:0}input[type=color]{padding:2px}input[type=range]{padding:0}.hero input{max-width:560px}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:16px;margin:16px 0}.card{display:flex;flex-direction:column;gap:6px;padding:16px;background:var(--card);border:1px solid var(--bd);border-radius:16px;color:var(--fg);text-decoration:none;transition:transform .15s}
.card:hover{transform:translateY(-2px)}.card h3{margin:0}.card p{margin:0;color:var(--mut);flex:1}.ic{color:var(--pr)}.tag{font-size:.75rem;color:var(--mut)}
.row{display:flex;gap:8px;flex-wrap:wrap;align-items:center}.fv{min-width:44px;min-height:44px;border:1px solid var(--bd);border-radius:10px;background:var(--card);color:var(--pr);font-size:1.2rem;cursor:pointer}
.ctl{display:grid;grid-template-columns:2fr 1fr 1fr;gap:8px}.form{display:grid;gap:12px;margin:16px 0}.form label{display:grid;gap:4px;font-weight:600}
.out{margin:16px 0;padding:16px;background:var(--card);border:1px solid var(--bd);border-radius:16px;display:grid;gap:10px}pre{margin:0;white-space:pre-wrap;word-break:break-word;font:14px/1.5 ui-monospace,monospace}
.big{font-size:2rem;font-weight:700;font-variant-numeric:tabular-nums}.hint,.bc{color:var(--mut);font-size:.9rem}.sw{height:60px;border-radius:10px;border:1px solid var(--bd)}
.cal{display:grid;grid-template-columns:repeat(7,1fr);gap:4px;text-align:center}.day{min-height:44px;border:1px solid var(--bd);border-radius:8px;background:var(--card);color:var(--fg);cursor:pointer;position:relative}
.day.today{border-color:var(--pr)}.day.sel{background:var(--pr);color:var(--ok)}.day i{position:absolute;bottom:4px;left:50%;width:6px;height:6px;margin-left:-3px;border-radius:50%;background:currentColor}
.tl{padding:0;list-style:none}.tl li{display:flex;gap:8px;align-items:center;flex-wrap:wrap;padding:6px 0;border-bottom:1px solid var(--bd)}.dn{text-decoration:line-through;color:var(--mut)}
.wc{grid-template-columns:repeat(auto-fit,minmax(180px,1fr))}.wc div{display:grid}progress{width:100%}
footer{display:flex;flex-wrap:wrap;gap:16px;justify-content:space-between;padding:24px 16px;border-top:1px solid var(--bd);color:var(--mut)}footer nav{display:flex;gap:12px;flex-wrap:wrap}
#toast{position:fixed;left:50%;bottom:24px;transform:translate(-50%,20px);padding:10px 18px;border-radius:10px;background:var(--fg);color:var(--bg);opacity:0;pointer-events:none;transition:.2s}#toast.on{opacity:1;transform:translate(-50%,0)}
@media(max-width:720px){#mb{display:inline-flex}#nav{display:none;position:absolute;top:100%;left:0;right:0;flex-direction:column;padding:12px 16px;background:var(--card);border-bottom:1px solid var(--bd)}#nav.on{display:flex}.ctl{grid-template-columns:1fr}}
@media(prefers-reduced-motion:reduce){*{transition:none!important}}