*{box-sizing:border-box}
:root{
  --bg:#0b1020; --card:#121a33; --muted:#93a2c9; --accent:#ff6a00; --text:#e9efff;
}
html,body{height:100%}
body{margin:0;font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,Cantarell,Noto Sans,sans-serif;
  background:radial-gradient(1200px 800px at 20% -10%, #1b2447 0%, #0b1020 60%);color:var(--text)}
.container{max-width:980px;margin:0 auto;padding:24px}
.hero{text-align:center;margin:18px 0 26px}
.hero h1{font-size:clamp(28px,5vw,42px);margin:0 0 6px;font-weight:800;letter-spacing:0.3px}
.hero p{margin:0;color:var(--muted)}
.card{background:var(--card);border:1px solid rgba(255,255,255,.06);border-radius:18px;padding:16px;box-shadow:0 10px 30px rgba(0,0,0,.25)}
.one{margin-top:10px}
label{display:block;margin:8px 0 6px;color:#cfe0ff;font-size:14px}
textarea{width:100%;min-height:180px;background:#0f1630;color:var(--text);
  border:1px solid rgba(255,255,255,.08);border-radius:12px;padding:12px 14px;resize:vertical;line-height:1.45;outline:none}
.row{display:flex;gap:10px;align-items:center;margin-bottom:8px;flex-wrap:wrap}
.spacer{flex:1}
.two-col{display:grid;grid-template-columns:1fr;gap:12px}
@media(min-width:900px){.two-col{grid-template-columns:1fr 1fr}}
button{appearance:none;border:none;border-radius:12px;padding:10px 14px;font-weight:600;cursor:pointer;
  background:linear-gradient(180deg,#ff8a32,#ff6a00);color:#1b0900;box-shadow:0 6px 16px rgba(255,106,0,.35)}
button.ghost{background:#1a2449;color:var(--text);box-shadow:none;border:1px solid rgba(255,255,255,.08)}
button.toggle{background:#203062;color:#e9efff;border:1px solid rgba(255,255,255,.12)}
button:active{transform:translateY(1px)}
.hint{opacity:.7;display:block;margin-top:8px}
footer{opacity:.7;text-align:center;margin-top:20px;font-size:14px}
code{background:#10193a;padding:2px 6px;border-radius:8px}
.toast{position:fixed;left:50%;top:20px;transform:translateX(-50%);background:#091230;padding:10px 14px;border:1px solid rgba(255,255,255,.1);border-radius:10px;color:#e9efff;z-index:9999;box-shadow:0 10px 25px rgba(0,0,0,.3)}