:root{--bg:#0f1115;--card:#151823;--text:#e8eefc;--muted:#9aa4b2;--accent:#6ea8fe;}
*{box-sizing:border-box}
html,body{height:100%}
body{margin:0;background:var(--bg);color:var(--text);font:16px/1.5 system-ui,Segoe UI,Roboto,Helvetica,Arial}
.header{display:flex;align-items:center;gap:.75rem;padding:18px 22px;border-bottom:1px solid #1e2331;background:rgba(21,24,35,.7);backdrop-filter:blur(6px);position:sticky;top:0}
.logo{width:42px;height:42px}
.brand{font-weight:700;font-size:18px;letter-spacing:.2px}
.container{max-width:720px;margin:32px auto;padding:0 16px}
.card{background:var(--card);border:1px solid #23293a;border-radius:14px;padding:20px;box-shadow:0 8px 24px rgba(0,0,0,.25)}
h1{margin:0 0 10px 0;font-size:26px}
.input{width:100%;padding:12px 14px;border-radius:10px;border:1px solid #2a3042;background:#0f131d;color:var(--text);outline:none}
.row{display:flex;gap:10px;margin-top:12px}
.btn{appearance:none;border:1px solid #2a3042;background:#0f131d;padding:10px 14px;border-radius:10px;color:var(--text);cursor:pointer}
.btn.primary{background:var(--accent);border-color:transparent;color:#0a0f1c;font-weight:700}
small{color:var(--muted)}
pre{white-space:pre-wrap;word-wrap:break-word}
.link{color:var(--accent);text-decoration:none}
.footer{opacity:.6;text-align:center;margin:28px 0}