:root {
  --bg: #0e1116; --card: #171c24; --line: #2a323d; --fg: #e6edf3; --muted: #8b98a8;
  --accent: #3fb950; --danger: #f85149; --warn: #f0b429; --mono: ui-monospace, SFMono-Regular, Menlo, monospace;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--fg); font: 15px/1.5 system-ui, -apple-system, Segoe UI, Roboto, sans-serif; }
header { display: flex; align-items: baseline; gap: 12px; padding: 16px 20px; border-bottom: 1px solid var(--line); }
header h1 { font-size: 18px; margin: 0; }
.net { color: var(--muted); font-size: 12px; }
.warn { margin: 14px 20px 0; padding: 10px 14px; background: rgba(240,180,41,.1); border: 1px solid rgba(240,180,41,.4);
        border-radius: 8px; color: #f5d485; font-size: 13px; }
.card { max-width: 560px; margin: 18px auto; padding: 20px; background: var(--card); border: 1px solid var(--line); border-radius: 12px; }
h2 { font-size: 16px; margin: 0 0 14px; }
h3 { font-size: 14px; margin: 0 0 10px; }
label { display: block; margin: 10px 0; color: var(--muted); font-size: 13px; }
input, textarea { width: 100%; margin-top: 4px; padding: 9px 11px; background: #0e1116; color: var(--fg);
                  border: 1px solid var(--line); border-radius: 8px; font: inherit; }
input:focus, textarea:focus { outline: none; border-color: #3b6; }
.row { display: flex; gap: 10px; margin-top: 12px; flex-wrap: wrap; }
button { padding: 9px 16px; border: 1px solid var(--line); background: #232a34; color: var(--fg);
         border-radius: 8px; font: inherit; cursor: pointer; }
button:hover { border-color: #4a5568; }
button.primary { background: #1f6feb; border-color: #1f6feb; }
button.danger { background: var(--danger); border-color: var(--danger); color: #fff; }
button.danger-ghost { background: transparent; border-color: var(--danger); color: var(--danger); }
button.mini { padding: 3px 9px; font-size: 12px; }
.sep, .hint { color: var(--muted); font-size: 12px; }
.sep { text-align: center; margin: 14px 0; }
hr { border: none; border-top: 1px solid var(--line); margin: 16px 0; }
.mono { font-family: var(--mono); font-size: 12px; word-break: break-all; }
.keybox { padding: 12px; background: #0e1116; border: 1px solid var(--warn); border-radius: 8px; margin: 10px 0; }
.acct { display: flex; flex-wrap: wrap; align-items: center; gap: 14px; padding-bottom: 14px; border-bottom: 1px solid var(--line); }
.acct .lbl { color: var(--muted); font-size: 12px; }
.acct #acct-bal { color: var(--accent); font-weight: 600; }
.acct #btn-lock { margin-left: auto; }
.tabs { display: flex; gap: 6px; margin: 16px 0; }
.tab { flex: 1; background: transparent; border-bottom: 2px solid transparent; border-radius: 0; }
.tab.active { color: var(--fg); border-bottom-color: #1f6feb; }
.pane { padding-top: 6px; }
.preview { margin-top: 18px; padding: 14px; border: 1px solid var(--danger); border-radius: 10px; background: rgba(248,81,73,.06); }
.preview .mono { white-space: pre; overflow-x: auto; display: block; }
.soon { text-align: center; padding: 30px 10px; color: var(--muted); }
.soon h3 { margin-bottom: 6px; }
footer { max-width: 560px; margin: 20px auto; padding: 0 20px; color: var(--muted); }