:root {
  --bg: #070b10;
  --bg-glow: #122033;
  --surface: #eef2f8;
  --surface-inner: #ffffff;
  --border: #c5d0e0;
  --text: #0f1724;
  --muted: #4a5568;
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --danger: #b91c1c;
  --ok: #15803d;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: radial-gradient(ellipse 120% 80% at 50% 0%, var(--bg-glow) 0%, var(--bg) 55%);
  color: var(--text);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
}

.card {
  width: 100%;
  max-width: 420px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 2rem 1.75rem;
  box-shadow:
    0 0 0 1px rgba(255, 255, 255, 0.06),
    0 24px 48px rgba(0, 0, 0, 0.45),
    0 8px 16px rgba(0, 0, 0, 0.25);
}

h1 {
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0 0 1.25rem;
  color: var(--text);
}

.sub {
  color: var(--muted);
  font-size: 0.875rem;
  margin: 0 0 1rem;
}

label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--muted);
  margin-bottom: 0.35rem;
}

input {
  width: 100%;
  padding: 0.65rem 0.75rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--surface-inner);
  color: var(--text);
  font-size: 1rem;
  margin-bottom: 1rem;
}

input:focus {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
  border-color: var(--accent);
}

input.totp {
  letter-spacing: 0.35em;
  font-variant-numeric: tabular-nums;
  text-align: center;
}

button {
  width: 100%;
  padding: 0.75rem;
  border: none;
  border-radius: 8px;
  background: var(--accent);
  color: #fff;
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
}

button:hover {
  background: var(--accent-hover);
}

button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.error {
  color: var(--danger);
  font-size: 0.875rem;
  margin-bottom: 1rem;
  min-height: 1.25rem;
}

.hidden {
  display: none;
}

.mono {
  font-family: ui-monospace, monospace;
  font-size: 0.75rem;
  word-break: break-all;
  background: var(--surface-inner);
  border: 1px solid var(--border);
  padding: 0.75rem;
  border-radius: 8px;
  margin: 0.5rem 0 1rem;
  color: var(--text);
}

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

.card--wide {
  max-width: 520px;
}

.field-row {
  display: flex;
  gap: 0.5rem;
  align-items: stretch;
  margin-bottom: 0.35rem;
}

.field-row .mono-field {
  flex: 1;
  min-width: 0;
  margin-bottom: 0;
  font-family: ui-monospace, monospace;
  font-size: 0.8rem;
  letter-spacing: 0.04em;
}

.btn-secondary {
  width: auto;
  flex-shrink: 0;
  padding: 0.65rem 1rem;
  background: var(--surface-inner);
  color: var(--text);
  border: 1px solid var(--border);
  font-size: 0.875rem;
}

.btn-secondary:hover {
  background: var(--border);
}

.field-hint {
  min-height: 1.25rem;
  font-size: 0.8rem;
  color: var(--ok);
  margin: 0 0 1.25rem;
}

#secret-block + form {
  margin-top: 0.25rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border);
}