* { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --bg: #0f172a;
  --bg-2: #1e293b;
  --fg: #e2e8f0;
  --fg-dim: #94a3b8;
  --accent: #06b6d4;
  --accent-hover: #0891b2;
  --danger: #ef4444;
  --ok: #10b981;
}
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  background: linear-gradient(135deg, var(--bg) 0%, #1a1f3a 100%);
  color: var(--fg);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}
.card {
  background: var(--bg-2);
  border-radius: 16px;
  padding: 2.5rem 2rem;
  width: 100%;
  max-width: 420px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.4);
  border: 1px solid rgba(255,255,255,0.06);
}
.card.wide { max-width: 720px; }
h1 {
  font-size: 1.75rem;
  margin-bottom: 0.5rem;
  background: linear-gradient(135deg, var(--accent), #a78bfa);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.subtitle { color: var(--fg-dim); font-size: 0.9rem; margin-bottom: 2rem; }
label { display: block; font-size: 0.85rem; color: var(--fg-dim); margin-bottom: 0.4rem; }
input[type="text"], input[type="password"] {
  width: 100%;
  padding: 0.85rem 1rem;
  background: var(--bg);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 10px;
  color: var(--fg);
  font-size: 1rem;
  margin-bottom: 1rem;
  transition: border-color 0.2s;
}
input:focus { outline: none; border-color: var(--accent); }
button {
  width: 100%;
  padding: 0.9rem;
  background: var(--accent);
  color: var(--bg);
  border: none;
  border-radius: 10px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s;
}
button:hover { background: var(--accent-hover); }
button:disabled { opacity: 0.6; cursor: not-allowed; }
.msg { padding: 0.75rem; border-radius: 8px; margin-bottom: 1rem; font-size: 0.9rem; display: none; }
.msg.error { background: rgba(239,68,68,0.15); color: #fca5a5; display: block; }
.msg.ok { background: rgba(16,185,129,0.15); color: #6ee7b7; display: block; }
.checkbox-row {
  display: flex; align-items: center; gap: 0.5rem;
  margin-bottom: 1rem; font-size: 0.9rem; color: var(--fg-dim);
}
.checkbox-row input { width: auto; margin: 0; }
.code-input {
  text-align: center;
  font-size: 2rem !important;
  letter-spacing: 0.5rem;
  font-family: "Courier New", monospace;
}
.header-bar {
  display: flex; justify-content: space-between; align-items: center;
  padding: 1rem 1.5rem; margin-bottom: 1.5rem;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.header-bar h1 { font-size: 1.25rem; margin: 0; }
.header-bar button {
  width: auto; padding: 0.5rem 1rem; font-size: 0.85rem;
  background: transparent; border: 1px solid rgba(255,255,255,0.15);
  color: var(--fg-dim);
}
.header-bar button:hover { background: rgba(255,255,255,0.05); }
.status-card {
  background: var(--bg); padding: 1.25rem; border-radius: 10px;
  margin-bottom: 1rem; border-left: 3px solid var(--accent);
}
.status-card .label { font-size: 0.75rem; color: var(--fg-dim); text-transform: uppercase; letter-spacing: 0.05em; }
.status-card .value { font-size: 1rem; margin-top: 0.25rem; }
.status-card.ok { border-left-color: var(--ok); }
.status-card.error { border-left-color: var(--danger); }
code { background: var(--bg); padding: 0.15em 0.4em; border-radius: 4px; font-size: 0.9em; }