:root {
  --bg: #0f1419;
  --panel: #1a2230;
  --panel2: #232d3d;
  --ink: #e6edf3;
  --muted: #8b98a9;
  --accent: #4f9cff;
  --accent2: #2d7be0;
  --ok: #3fb950;
  --err: #f85149;
  --border: #2d3848;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font: 15px/1.55 system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  background: var(--bg);
  color: var(--ink);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}
header {
  text-align: center;
  padding: 28px 16px 8px;
}
header h1 { margin: 0; font-size: 1.6rem; }
.tagline { color: var(--muted); margin: 6px 0 0; font-size: 0.9rem; }

.tabs {
  display: flex;
  gap: 8px;
  justify-content: center;
  padding: 18px 16px 0;
}
.tab {
  background: var(--panel);
  color: var(--muted);
  border: 1px solid var(--border);
  padding: 10px 18px;
  border-radius: 8px 8px 0 0;
  cursor: pointer;
  font-size: 0.95rem;
}
.tab.active { background: var(--panel2); color: var(--ink); border-bottom-color: var(--panel2); }

main {
  flex: 1;
  width: 100%;
  max-width: 680px;
  margin: 0 auto;
  padding: 0 16px 40px;
}
.panel {
  display: none;
  background: var(--panel2);
  border: 1px solid var(--border);
  border-radius: 0 0 12px 12px;
  padding: 24px;
}
.panel.active { display: block; }

.lead { color: var(--muted); margin-top: 0; }
.hint { color: var(--muted); font-size: 0.85rem; min-height: 1em; }
.hint.error { color: var(--err); }
.hint.success { color: var(--ok); }

label {
  display: block;
  margin: 14px 0 0;
  font-size: 0.85rem;
  color: var(--muted);
}
input, textarea {
  width: 100%;
  margin-top: 6px;
  padding: 10px 12px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--ink);
  font: inherit;
  font-family: inherit;
}
textarea { resize: vertical; font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 0.82rem; }
input:focus, textarea:focus { outline: none; border-color: var(--accent); }

button.primary {
  margin-top: 16px;
  background: var(--accent2);
  color: #fff;
  border: 0;
  padding: 11px 20px;
  border-radius: 8px;
  font-size: 0.95rem;
  cursor: pointer;
}
button.primary:hover { background: var(--accent); }
button.primary:disabled { opacity: 0.5; cursor: default; }

.steps { list-style: none; padding: 0; margin: 18px 0 0; }
.step {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px 18px;
  margin-bottom: 14px;
}
.step h3 { margin: 0 0 4px; font-size: 1rem; }

.callout {
  margin: 18px 0;
  padding: 12px 14px;
  border-radius: 8px;
  font-size: 0.9rem;
}
.callout.ok { background: rgba(63,185,80,0.12); border: 1px solid var(--ok); color: #7ee787; }

.share-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px 16px;
  margin-top: 14px;
}
.share-card h4 { margin: 0 0 8px; font-size: 0.92rem; }
.share-card button {
  margin: 8px 8px 0 0;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--muted);
  padding: 6px 12px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.8rem;
}
.share-card button:hover { border-color: var(--accent); color: var(--ink); }

code { background: var(--bg); padding: 1px 6px; border-radius: 4px; font-size: 0.85em; }

footer {
  text-align: center;
  padding: 14px;
  color: var(--muted);
  font-size: 0.8rem;
  border-top: 1px solid var(--border);
}
.dot { display: inline-block; width: 8px; height: 8px; border-radius: 50%; background: var(--muted); margin-right: 6px; vertical-align: middle; }
.dot.ok { background: var(--ok); }
.dot.err { background: var(--err); }