:root {
  --bg: #0b0f1c;
  --card: #131826;
  --text: #f8fafc;
  --muted: #94a3b8;
  --accent: #38bdf8;
  --border: rgba(148, 163, 184, 0.2);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial;
  background: radial-gradient(circle at top left, #1e293b, #0b0f1c 70%);
  color: var(--text);
  min-height: 100vh;
}

.app {
  max-width: 1000px;
  margin: 40px auto;
  padding: 24px;
  background: rgba(19, 24, 38, 0.75);
  border: 1px solid var(--border);
  border-radius: 20px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.35);
}

header { margin-bottom: 24px; }
header h1 { font-size: 2rem; margin-bottom: 6px; }
header p { color: var(--muted); }

.input label { display: block; margin-bottom: 8px; color: var(--muted); }
textarea {
  width: 100%;
  min-height: 120px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: #0f172a;
  color: var(--text);
  padding: 12px;
}

.actions { display: flex; gap: 12px; margin-top: 12px; }

.panel {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 16px;
  margin-top: 20px;
}

.panel h3 { margin-bottom: 8px; }

.helper {
  color: var(--muted);
  font-size: 0.85rem;
  margin-bottom: 10px;
}

.verify-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 10px;
  align-items: center;
  margin-bottom: 6px;
}

input[type="text"] {
  width: 100%;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: #0f172a;
  color: var(--text);
}

pre {
  background: #0f172a;
  border: 1px solid var(--border);
  padding: 12px;
  border-radius: 12px;
  white-space: pre-wrap;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas;
  font-size: 0.9rem;
}

.btn {
  border: 1px solid var(--border);
  background: rgba(56, 189, 248, 0.15);
  color: var(--text);
  padding: 10px 16px;
  border-radius: 10px;
  cursor: pointer;
}

.btn.primary {
  background: linear-gradient(135deg, #38bdf8, #22d3ee);
  color: #0b1220;
  border: none;
  font-weight: 600;
}

.meta {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
  margin-top: 20px;
}

.meta-card {
  padding: 16px;
  background: #0f172a;
  border-radius: 12px;
  border: 1px solid var(--border);
}

.muted { color: var(--muted); margin-top: 8px; }

footer {
  text-align: center;
  color: var(--muted);
  padding: 20px;
}