:root{--bg:#f4f6f4;--fg:#16221a;--card:#fff;--acc:#1f6b3a;--mut:#5b6b60;--bad:#b3261e;--line:#d8dfd9}
@media(prefers-color-scheme:dark){:root{--bg:#101612;--fg:#e8efe9;--card:#18211b;--acc:#6fcf8e;--mut:#9fb0a4;--bad:#ff8a80;--line:#2a372e}}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--fg);font:16px/1.5 system-ui,sans-serif}
main{max-width:34rem;margin:0 auto;padding:1rem 16px 3rem}
h1{font-size:1.3rem;margin:1.2rem 0 .6rem}h2{font-size:1.05rem;margin:1.4rem 0 .4rem}
.card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:1rem;margin:.6rem 0}
label{display:block;margin:.7rem 0 .2rem;font-weight:600}input{width:100%;padding:.7rem;border:1px solid var(--line);border-radius:8px;background:var(--bg);color:var(--fg);font:inherit}
button{margin-top:1rem;padding:.75rem 1rem;border:0;border-radius:8px;background:var(--acc);color:var(--bg);font:inherit;font-weight:700;cursor:pointer;min-height:44px}
button.sec{background:transparent;color:var(--fg);border:1px solid var(--line)}
.err{color:var(--bad);margin:.6rem 0}.mut{color:var(--mut);font-size:.92rem}.row{display:flex;justify-content:space-between;gap:1rem}
.top{display:flex;justify-content:space-between;align-items:center}