:root{
  --bg:#0f172a; --card:#1e293b; --card2:#273549; --txt:#e2e8f0; --mut:#94a3b8;
  --acc:#6366f1; --acc2:#22d3ee; --ok:#34d399;
}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:'Segoe UI',system-ui,sans-serif;background:radial-gradient(1200px 600px at 80% -10%,#312e81 0%,var(--bg) 55%);color:var(--txt);min-height:100vh}
header{display:flex;justify-content:space-between;align-items:center;padding:22px 5vw;max-width:1100px;margin:0 auto}
.brand{display:flex;gap:14px;align-items:center}
.logo{font-size:2.2rem}
h1{font-size:1.5rem;background:linear-gradient(90deg,var(--acc2),var(--acc));-webkit-background-clip:text;background-clip:text;color:transparent}
.brand p{color:var(--mut);font-size:.85rem}
.badge{background:var(--card2);border:1px solid #334155;padding:6px 14px;border-radius:999px;font-size:.8rem;color:var(--mut)}
main{max-width:1100px;margin:0 auto;padding:0 5vw 40px}
.card{background:var(--card);border:1px solid #334155;border-radius:16px;padding:22px}
.modes{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:18px}
.mode{background:var(--card2);border:1px solid #334155;color:var(--txt);padding:10px 16px;border-radius:12px;cursor:pointer;font-size:.9rem;transition:.2s}
.mode:hover{border-color:var(--acc)}
.mode.active{background:linear-gradient(135deg,var(--acc),#8b5cf6);border-color:transparent;font-weight:600}
.row{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-bottom:14px}
.field label{display:block;font-size:.85rem;color:var(--mut);margin-bottom:6px}
select,textarea{width:100%;background:var(--card2);border:1px solid #334155;color:var(--txt);border-radius:10px;padding:11px 13px;font-size:.95rem;font-family:inherit}
select:focus,textarea:focus{outline:none;border-color:var(--acc)}
textarea{resize:vertical;line-height:1.5}
.counter{text-align:right;font-size:.75rem;color:var(--mut);margin-top:4px}
.examples{display:flex;flex-wrap:wrap;gap:8px;margin:12px 0 16px}
.examples button{background:transparent;border:1px dashed #475569;color:var(--mut);border-radius:999px;padding:6px 12px;font-size:.78rem;cursor:pointer}
.examples button:hover{color:var(--txt);border-color:var(--acc2)}
.go{width:100%;background:linear-gradient(135deg,var(--acc),#8b5cf6);border:none;color:#fff;font-size:1.05rem;font-weight:700;padding:14px;border-radius:12px;cursor:pointer;transition:.2s}
.go:hover{filter:brightness(1.12)}
.go:disabled{opacity:.6;cursor:wait}
.result{margin-top:26px}
.result-head{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:10px;margin-bottom:14px}
.result-head h2{font-size:1.15rem}
.actions{display:flex;gap:8px;flex-wrap:wrap}
.ghost{background:var(--card2);border:1px solid #334155;color:var(--txt);padding:8px 14px;border-radius:10px;cursor:pointer;font-size:.85rem}
.ghost:hover{border-color:var(--acc2)}
.md{line-height:1.75;font-size:.98rem;overflow-x:auto}
.md h1,.md h2,.md h3{margin:1.1em 0 .5em;color:var(--acc2)}
.md p{margin:.6em 0}
.md ul,.md ol{margin:.6em 0 .6em 1.6em}
.md code{background:#0b1220;padding:2px 7px;border-radius:6px;color:var(--acc2);font-size:.9em}
.md pre{background:#0b1220;border:1px solid #334155;border-radius:10px;padding:14px;overflow-x:auto;margin:.8em 0}
.md pre code{background:none;padding:0}
.md table{border-collapse:collapse;margin:.8em 0;width:100%}
.md th,.md td{border:1px solid #334155;padding:8px 12px;text-align:left}
.md th{background:var(--card2)}
.md blockquote{border-left:3px solid var(--acc);padding-left:14px;color:var(--mut);margin:.8em 0}
.md img{max-width:100%;border-radius:10px}
#htmlOut{width:100%;height:78vh;border:1px solid #334155;border-radius:16px;background:#fff}
.err{background:#450a0a;border:1px solid #7f1d1d;color:#fecaca;padding:14px 18px;border-radius:12px;margin-top:14px}
.hidden{display:none!important}
footer{text-align:center;color:var(--mut);font-size:.8rem;padding:20px}
@media(max-width:640px){.row{grid-template-columns:1fr}.result-head{flex-direction:column;align-items:flex-start}}