:root {
  --bg:#0f172a; --panel:#111827; --text:#e5e7eb;
  --muted:#9ca3af; --accent:#22c55e; --error:#ef4444;
}

html,body { height:100%; }
body {
  margin:0; background:var(--bg); color:var(--text);
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
}

.container { max-width: 980px; margin: 40px auto; padding: 0 16px; }
.card { background: var(--panel); border: 1px solid #1f2937; border-radius: 14px; box-shadow: 0 10px 30px rgba(0,0,0,.22); }
.toolbar { display:flex; justify-content:space-between; gap:12px; align-items:center; padding:12px 14px; border-bottom:1px solid #1f2937; }
.toolbar-actions { display:flex; gap:8px; align-items:center; }
.title { font-weight:700; letter-spacing:.3px; }
.muted { color: var(--muted); }
.editor { width:100%; min-height:120px; background:#0b1220; color:var(--text); border:none; outline:none; resize:vertical; padding:12px 14px; font-size:15px; line-height:1.45; border-radius:12px; }
.output { white-space: pre-wrap; font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace; font-size:14px; padding:12px 14px; max-height: 340px; overflow:auto; }
.btn { padding:10px 14px; border-radius: 12px; border:1px solid #1f2937; background:#0b1220; color:var(--text); cursor:pointer; }
.btn:hover { filter: brightness(1.08); }
.btn.primary { background: #052e1b; border-color:#064e3b; }
.btn.primary .dot { display:inline-block; width:8px; height:8px; background:var(--accent); border-radius:50%; margin-right:8px; }
.tag { display:inline-block; border:1px solid #1f2937; border-radius:999px; padding:4px 10px; font-size:12px; }
.hr { height:1px; background:#1f2937; margin:14px 0; }
.prompt { color:#60a5fa; }
.ok { color: var(--accent); }
.err { color: var(--error); }
a { color:#93c5fd; text-decoration:none; }
a:hover { text-decoration:underline; }
.footer-note { margin-top:12px; font-size:12px; }