:root {
  --nv-ink: #071a2f;
  --nv-muted: #607386;
  --nv-teal: #007b77;
  --nv-teal-dark: #00545b;
  --nv-border: #d8e4e7;
  --nv-surface: #f3f8f8;
  --nv-font: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }

html, body {
  min-height: 100%;
  margin: 0;
}

body {
  font-family: var(--nv-font);
  color: var(--nv-ink);
  background:
    radial-gradient(circle at 20% 10%, rgba(var(--nv-accent-rgb, 62, 194, 180), .12), transparent 28%),
    linear-gradient(145deg, var(--nv-accent-tint, #eef6f6), #fbfdfd);
}

button { font: inherit; }

.auth-flow-shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 32px 20px;
}

.auth-flow-card {
  width: min(100%, 620px);
  background: rgba(255,255,255,.94);
  border: 1px solid var(--nv-border);
  border-radius: 28px;
  box-shadow: 0 28px 72px rgba(18,47,63,.12);
  padding: 46px;
}

.auth-flow-card--center { text-align: center; }

.mini-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 38px;
}

.auth-flow-card--center .mini-brand { justify-content: center; }

.mini-brand img {
  width: 58px;
  height: 38px;
}

.mini-brand span {
  font-size: 30px;
  font-weight: 750;
  letter-spacing: -.04em;
}

.eyebrow {
  color: var(--nv-teal);
  font-size: 12px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: .18em;
}

.auth-flow-heading h1,
.auth-flow-card h1 {
  margin: 10px 0 10px;
  font-size: 34px;
  letter-spacing: -.035em;
}

.auth-flow-heading p,
.auth-flow-card p {
  margin: 0;
  line-height: 1.6;
  color: var(--nv-muted);
}

.tenant-list {
  display: grid;
  gap: 12px;
  margin-top: 30px;
}

.tenant-choice {
  width: 100%;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 15px;
  padding: 15px 17px;
  border: 1px solid var(--nv-border);
  border-radius: 16px;
  background: #fff;
  color: var(--nv-ink);
  text-align: left;
  cursor: pointer;
  transition: border-color .15s ease, transform .15s ease, box-shadow .15s ease;
}

.tenant-choice:hover {
  transform: translateY(-1px);
  border-color: var(--nv-accent-border, #84c8c2);
  box-shadow: 0 10px 24px rgba(var(--nv-brand-dark-rgb, 0, 95, 93), .08);
}

.tenant-avatar {
  width: 46px;
  height: 46px;
  border-radius: 13px;
  display: grid;
  place-items: center;
  background: var(--nv-accent-soft, #e2f2f0);
  color: var(--nv-teal-dark);
  font-size: 19px;
  font-weight: 800;
}

.tenant-copy strong,
.tenant-copy small { display: block; }

.tenant-copy strong { font-size: 16px; }
.tenant-copy small { margin-top: 4px; color: var(--nv-muted); }
.tenant-arrow { color: var(--nv-teal); font-size: 22px; }

.empty-state-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 20px;
  border-radius: 18px;
  display: grid;
  place-items: center;
  background: var(--nv-accent-soft, #e2f2f0);
  color: var(--nv-teal);
  font-size: 30px;
}

.secondary-action {
  margin-top: 26px;
  min-width: 150px;
  min-height: 48px;
  border: 1px solid var(--nv-accent-border, #87beba);
  border-radius: 13px;
  background: white;
  color: var(--nv-teal-dark);
  font-weight: 700;
  cursor: pointer;
}

.session-chip {
  display: inline-flex;
  margin-top: 22px;
  padding: 9px 13px;
  border-radius: 999px;
  background: var(--nv-accent-tint, #eef6f6);
  color: var(--nv-teal-dark);
  font-size: 13px;
  font-weight: 650;
}

/* First-administrator invitation (ADR 0085 §4). */
.auth-flow-form { display: grid; gap: 14px; margin-top: 24px; }
.auth-flow-field { display: grid; gap: 6px; font-size: 13px; font-weight: 650; }
.auth-flow-field input {
  min-height: 46px; padding: 0 14px; border: 1px solid var(--nv-border); border-radius: 12px;
  font: inherit; color: var(--nv-ink); background: #fff;
}
.auth-flow-field input:focus-visible { outline: 3px solid var(--nv-accent-border, #87beba); outline-offset: 1px; }
.auth-flow-submit {
  display: inline-flex; align-items: center; justify-content: center; min-height: 48px;
  padding: 0 20px; border: 0; border-radius: 13px; color: #fff;
  background: var(--nv-button-primary, var(--nv-teal)); font-weight: 700; cursor: pointer;
  text-decoration: none;
}
.auth-flow-submit--link { margin-top: 24px; }
.auth-flow-error {
  margin: 18px 0 0; padding: 10px 14px; border: 1px solid #e5b5ba; border-radius: 12px;
  color: #8a2430 !important; background: #fdf1f2; font-weight: 600;
}
.auth-flow-link { display: inline-block; margin-top: 22px; color: var(--nv-teal-dark); font-weight: 700; }

@media (max-width: 620px) {
  .auth-flow-card { padding: 30px 22px; border-radius: 22px; }
  .auth-flow-heading h1, .auth-flow-card h1 { font-size: 29px; }
}

/* Environment banner (ADR 0141 §6, K5; app/_environment_banner.html). Staging and unknown
   environments only, never production. Warning semantics, not brand colours, so every theme
   preset shows it the same way. */
.nv-environment-banner {
  display: block; margin: 0; padding: 7px 16px; text-align: center;
  font-size: 13px; font-weight: 600; line-height: 1.4; letter-spacing: .01em;
  color: #3d2a00; background: #f6d987; border-bottom: 1px solid #d9b44a;
}
.nv-environment-banner strong { font-weight: 800; letter-spacing: .08em; }
.nv-environment-banner--unknown { color: #fff; background: #a63e49; border-bottom-color: #7f2d36; }

/* Platform MFA (ADR 0142; auth/mfa_*.html): QR code, key and recovery codes. */
.auth-flow-steps { margin: 20px 0 0; padding-left: 20px; color: var(--nv-muted); line-height: 1.6; }
.auth-flow-qr {
  width: 220px; max-width: 100%; margin: 18px auto 0; padding: 12px;
  border: 1px solid var(--nv-border); border-radius: 16px; background: #fff;
}
.auth-flow-qr svg { display: block; width: 100%; height: auto; }
.auth-flow-card p.auth-flow-note { margin-top: 16px; font-size: 14px; }
.auth-flow-secret { margin-top: 8px !important; text-align: center; }
.auth-flow-secret code,
.auth-flow-codes code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 15px; letter-spacing: .06em; color: var(--nv-ink); word-break: break-all;
}
.auth-flow-codes {
  display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px 18px;
  margin: 22px 0 0; padding: 16px 18px 16px 40px;
  border: 1px solid var(--nv-border); border-radius: 16px; background: var(--nv-surface);
}
@media (max-width: 420px) { .auth-flow-codes { grid-template-columns: 1fr; } }