:root{--bg:#f6f5f2;--panel:#ffffff;--line:#e6e3dc;--line2:#d9d6ce;--text:#1b1a17;--muted:#6b675f;--dim:#97928a;
  --ok:#2c6e3f;--warn:#9a6510;--bad:#9a2f24;--accent:#1d5c86;--radius:10px}
@media (prefers-color-scheme: dark){:root{--bg:#16181a;--panel:#1d2023;--line:#2a2e32;--line2:#33383d;--text:#ecebe8;--muted:#96938d;--dim:#6e6b66;--ok:#74c48d;--warn:#d2a25a;--bad:#e08b7f;--accent:#79b3d8}}
*{box-sizing:border-box}
body{margin:0;min-height:100vh;display:grid;place-items:center;padding:1.2rem;background:var(--bg);color:var(--text);
  font:16px/1.55 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;padding-top:max(1.2rem,env(safe-area-inset-top))}
.card{width:100%;max-width:30rem;background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:1.6rem 1.5rem;box-shadow:0 10px 30px rgba(0,0,0,.12)}
.card.wide{max-width:44rem}
h1{margin:0 0 .4rem;font-size:1.4rem;letter-spacing:-.01em;display:flex;align-items:center;gap:.5rem}
h1 .mark{display:inline-block}
h2{font-size:1rem;margin:1.4rem 0 .5rem;color:var(--muted);text-transform:uppercase;letter-spacing:.06em;font-size:.78rem}
p{margin:.4rem 0}
.lead{color:var(--muted)}
.hint{color:var(--dim);font-size:.86rem}
label{display:block;font-size:.82rem;color:var(--muted);margin:.8rem 0 .25rem}
input:not([type=radio]),select{width:100%;font:inherit;padding:.6rem .7rem;border-radius:10px;border:1px solid var(--line2);background:var(--bg);color:var(--text)}
input:focus{outline:2px solid var(--accent);outline-offset:1px}
.btn,button.btn{font:inherit;font-weight:600;padding:.65rem 1rem;border-radius:8px;border:1px solid var(--accent);background:var(--accent);color:#fff;cursor:pointer;width:100%;margin-top:.6rem}
.btn:hover{filter:brightness(1.08)}
.btn[disabled]{opacity:.55;cursor:default}
.ghost{font:inherit;padding:.5rem .8rem;border-radius:10px;border:1px solid var(--line2);background:transparent;color:var(--text);cursor:pointer}
.ghost:hover{border-color:var(--accent)}
.danger{font:inherit;padding:.5rem .8rem;border-radius:10px;border:1px solid var(--bad);background:transparent;color:var(--bad);cursor:pointer}
.row{display:flex;gap:.6rem;flex-wrap:wrap;align-items:center;margin-top:.6rem}
.row .btn{width:auto;margin-top:0}
.msg{display:none;padding:.6rem .8rem;border-radius:10px;margin:.6rem 0;font-size:.92rem;border:1px solid var(--line2)}
.msg.on{display:block}
.msg.err{border-color:var(--bad);color:#ffd9d7}
.msg.ok{border-color:var(--ok);color:#d9f5ea}
.msg.info{border-color:var(--line2);color:var(--muted)}
.hidden{display:none!important}
.choice{display:flex;flex-direction:column;gap:.5rem;margin-top:.3rem}
.opt{display:flex;gap:.6rem;align-items:flex-start;padding:.6rem .7rem;border:1px solid var(--line2);border-radius:12px;cursor:pointer;font-size:.9rem;margin:0}
.opt input{margin-top:.25rem}
.opt:has(input:checked){border-color:var(--accent);background:rgba(91,141,239,.08)}
table{width:100%;border-collapse:collapse;font-size:.9rem;margin-top:.4rem}
th,td{text-align:left;padding:.45rem .4rem;border-bottom:1px solid var(--line);vertical-align:top}
th{font-size:.72rem;text-transform:uppercase;letter-spacing:.05em;color:var(--dim)}
.pill{display:inline-block;padding:.05rem .5rem;border-radius:999px;border:1px solid var(--line2);font-size:.78rem;color:var(--muted)}
.pill.ok{border-color:var(--ok);color:var(--ok)}
.pill.warn{border-color:var(--warn);color:var(--warn)}
.mono{font-family:ui-monospace,Menlo,monospace;font-size:.86em}
.code-big{font-family:ui-monospace,Menlo,monospace;font-size:2.2rem;letter-spacing:.18em;margin:.4rem 0 .2rem}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}