:root {
  --bg: #0e1116; --panel: #171b22; --panel2: #1e242d; --border: #2a313c;
  --text: #e6edf3; --muted: #8b97a7; --accent: #3b82f6; --accent2: #2563eb;
  --danger: #ef4444; --ok: #22c55e; --warn: #f59e0b;
}
* { box-sizing: border-box; }
body {
  margin: 0; font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  background: var(--bg); color: var(--text); font-size: 14px;
}
a { color: var(--accent); }
button {
  font: inherit; cursor: pointer; border: 1px solid var(--border); background: var(--panel2);
  color: var(--text); padding: 8px 14px; border-radius: 7px;
}
button:hover { border-color: var(--accent); }
button.primary { background: var(--accent2); border-color: var(--accent2); }
button.primary:hover { background: var(--accent); }
button.danger { color: var(--danger); }
button.danger:hover { border-color: var(--danger); }
input, textarea {
  font: inherit; background: var(--bg); color: var(--text); border: 1px solid var(--border);
  border-radius: 7px; padding: 8px 10px; width: 100%;
}
textarea { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; min-height: 240px; resize: vertical; }
label { display: block; color: var(--muted); margin: 10px 0 4px; font-size: 12px; text-transform: uppercase; letter-spacing: .04em; }

/* Login */
.login-wrap { min-height: 100vh; display: grid; place-items: center; }
.login-card { background: var(--panel); border: 1px solid var(--border); border-radius: 12px; padding: 28px; width: 340px; }
.login-card h1 { margin: 0 0 4px; font-size: 20px; }
.login-card p { margin: 0 0 18px; color: var(--muted); }

/* Layout */
header.topbar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 24px; border-bottom: 1px solid var(--border); background: var(--panel);
}
header.topbar h1 { font-size: 17px; margin: 0; }
header.topbar .right { color: var(--muted); display: flex; gap: 12px; align-items: center; }
.tabs { display: flex; gap: 6px; padding: 16px 24px 0; }
.tabs button { border-radius: 7px 7px 0 0; border-bottom: none; }
.tabs button.active { background: var(--panel); border-color: var(--border); color: var(--text); }
main { padding: 18px 24px; max-width: 980px; }
.card { background: var(--panel); border: 1px solid var(--border); border-radius: 10px; padding: 18px; margin-bottom: 18px; }
.card h2 { margin: 0 0 12px; font-size: 15px; }
.row { display: flex; gap: 10px; align-items: flex-end; flex-wrap: wrap; }
.row > div { flex: 1; min-width: 160px; }
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 9px 8px; border-bottom: 1px solid var(--border); }
th { color: var(--muted); font-size: 12px; text-transform: uppercase; }
code, .mono { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; }
.preview { color: var(--warn); }
.muted { color: var(--muted); }
.toast {
  position: fixed; bottom: 20px; right: 20px; background: var(--panel2);
  border: 1px solid var(--border); padding: 12px 16px; border-radius: 8px; max-width: 360px;
  opacity: 0; transform: translateY(8px); transition: .2s; pointer-events: none;
}
.toast.show { opacity: 1; transform: none; }
.toast.err { border-color: var(--danger); }
.toast.ok { border-color: var(--ok); }
pre.output {
  background: var(--bg); border: 1px solid var(--border); border-radius: 8px; padding: 12px;
  overflow: auto; max-height: 320px; white-space: pre-wrap; word-break: break-word;
}
.token-box { display: flex; gap: 8px; align-items: center; }
.token-box code { background: var(--bg); padding: 6px 8px; border-radius: 6px; border: 1px solid var(--border); flex: 1; overflow: auto; }
.hint { background: var(--panel2); border-left: 3px solid var(--accent); padding: 10px 12px; border-radius: 6px; color: var(--muted); margin-bottom: 14px; }
.hint code { color: var(--text); }
.flex-between { display: flex; justify-content: space-between; align-items: center; }