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

:root {
  --bg: #1a1a2e;
  --surface: #16213e;
  --primary: #0f3460;
  --accent: #e94560;
  --text: #eee;
  --text-muted: #999;
  --radius: 12px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100dvh;
  padding: 0 16px 32px;
}

header {
  text-align: center;
  padding: 32px 0 16px;
}
header h1 { font-size: 1.6rem; }
.subtitle { color: var(--text-muted); font-size: .9rem; margin-top: 4px; }

.card {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 20px;
  margin-top: 16px;
}
.card h2 { font-size: 1.1rem; margin-bottom: 12px; }

.btn {
  display: block;
  width: 100%;
  padding: 14px;
  border: none;
  border-radius: var(--radius);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: opacity .2s;
}
.btn:disabled { opacity: .4; cursor: default; }
.btn.primary { background: var(--accent); color: #fff; }
.btn.secondary { background: var(--primary); color: #fff; margin-top: 10px; }

.btn-group { display: flex; flex-direction: column; gap: 0; }

.status {
  margin-top: 10px;
  font-size: .85rem;
  color: var(--text-muted);
  min-height: 1.2em;
}
.status.ok { color: #4ade80; }
.status.err { color: var(--accent); }

form label {
  display: block;
  font-size: .85rem;
  color: var(--text-muted);
  margin-bottom: 14px;
}
form input,
form select {
  display: block;
  width: 100%;
  margin-top: 4px;
  padding: 12px;
  border: 1px solid #333;
  border-radius: 8px;
  background: var(--bg);
  color: var(--text);
  font-size: 1rem;
}
form select option { background: var(--bg); }

form .btn { margin-top: 6px; }