* { box-sizing: border-box; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: #0f172a;
  color: #e2e8f0;
  margin: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.container {
  width: 100%;
  max-width: 520px;
  padding: 32px;
}

h1 { margin-bottom: 4px; }
.subtitle { color: #94a3b8; margin-top: 0; }

label { display: block; margin: 16px 0 6px; font-size: 0.9rem; color: #cbd5e1; }

textarea, input, select {
  width: 100%;
  padding: 10px 12px;
  border-radius: 8px;
  border: 1px solid #334155;
  background: #1e293b;
  color: #e2e8f0;
  font-size: 0.95rem;
  font-family: inherit;
}

textarea { resize: vertical; }

button {
  margin-top: 20px;
  padding: 10px 18px;
  border-radius: 8px;
  border: none;
  background: #6366f1;
  color: white;
  font-size: 0.95rem;
  cursor: pointer;
}

button:hover { background: #4f46e5; }

.link-row { display: flex; gap: 8px; }
.link-row input { flex: 1; }

.hidden { display: none; }
.error { color: #f87171; }

#reset-btn, #copy-btn { background: #334155; }
#reset-btn:hover, #copy-btn:hover { background: #475569; }