:root{color-scheme:light dark;--zemin:#f6f7f9;--kart:#fff;--metin:#16181d;--soluk:#5b6370;--cizgi:#d5d9e0;--vurgu:#1d4ed8;--hata:#b42318}
@media (prefers-color-scheme:dark){:root{--zemin:#0f1115;--kart:#171a21;--metin:#e7e9ee;--soluk:#9aa3b2;--cizgi:#2a2f3a;--vurgu:#7aa2ff;--hata:#ff8a80}}
*{box-sizing:border-box}
body{margin:0;min-height:100vh;display:grid;place-items:center;padding:16px;background:var(--zemin);color:var(--metin);font:15px/1.5 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif}
main{width:100%;max-width:420px;background:var(--kart);border:1px solid var(--cizgi);border-radius:12px;padding:24px}
h1{font-size:19px;margin:0 0 6px}
p{margin:0 0 16px;color:var(--soluk);font-size:14px}
label{display:block;font-size:13px;font-weight:600;margin-bottom:6px}
input{width:100%;padding:10px 12px;border:1px solid var(--cizgi);border-radius:8px;background:transparent;color:inherit;font:14px ui-monospace,Menlo,Consolas,monospace}
input:focus-visible,button:focus-visible{outline:2px solid var(--vurgu);outline-offset:2px}
button{margin-top:14px;width:100%;padding:10px 12px;border:0;border-radius:8px;background:var(--vurgu);color:#fff;font:600 14px system-ui,sans-serif;cursor:pointer}
@media (prefers-color-scheme:dark){button{color:#0f1115}}
button[disabled]{opacity:.6;cursor:default}
#durum{min-height:20px;margin:12px 0 0;font-size:13.5px;color:var(--hata)}
small{display:block;margin-top:14px;color:var(--soluk);font-size:12.5px}