:root {
  --bg: #0f172a;
  --panel: #1e293b;
  --accent: #22d3ee;
  --accent-dark: #0891b2;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --danger: #f87171;
  --ok: #34d399;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  background: linear-gradient(180deg, var(--bg), #0b1220);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 40px 16px;
}

header {
  text-align: center;
  margin-bottom: 32px;
}

header h1 {
  font-size: 28px;
  margin: 0 0 8px;
}

header p {
  color: var(--muted);
  margin: 0;
  max-width: 480px;
}

.card {
  background: var(--panel);
  border: 1px solid #334155;
  border-radius: 12px;
  padding: 28px;
  width: 100%;
  max-width: 560px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.3);
}

textarea {
  width: 100%;
  min-height: 140px;
  resize: vertical;
  background: #0f172a;
  border: 1px solid #334155;
  border-radius: 8px;
  color: var(--text);
  padding: 12px;
  font-size: 14px;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
}

button {
  cursor: pointer;
  border: none;
  border-radius: 8px;
  padding: 12px 20px;
  font-size: 15px;
  font-weight: 600;
  background: var(--accent);
  color: #0b1220;
  transition: background .15s ease;
}

button:hover { background: var(--accent-dark); color: white; }
button:disabled { opacity: .5; cursor: not-allowed; }

.actions { margin-top: 16px; display: flex; gap: 12px; }

.link-box {
  margin-top: 20px;
  padding: 14px;
  background: #0f172a;
  border: 1px solid var(--accent);
  border-radius: 8px;
  word-break: break-all;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 13px;
}

.warning {
  margin-top: 14px;
  color: var(--danger);
  font-size: 13px;
}

.info { color: var(--muted); font-size: 13px; margin-top: 8px; }

.reveal-box {
  background: #0f172a;
  border: 1px solid var(--ok);
  border-radius: 8px;
  padding: 16px;
  white-space: pre-wrap;
  word-break: break-word;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  margin-top: 16px;
}

.error-box {
  background: #0f172a;
  border: 1px solid var(--danger);
  border-radius: 8px;
  padding: 16px;
  color: var(--danger);
  margin-top: 16px;
}

footer {
  margin-top: 32px;
  color: var(--muted);
  font-size: 12px;
  text-align: center;
}

a { color: var(--accent); }