/* ── Auth layout (route / public pages) ──────────────────────────────────── */
/*
 * Login, register, OTP, legal consent, Google button, ribbon background.
 * Auto-loaded when the page body includes `.bp-auth-grad-bg`.
 */


.bp-auth-grad-bg {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  background: var(--c-bg);
}

#auth-bg-svg {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  /* Wave crests stay in this band; ribbon paths fill down to the viewBox bottom. */
  height: min(72vh, 780px);
  z-index: 0;
  pointer-events: none;
  opacity: 1;
  backface-visibility: hidden;
  transform: translateZ(0);
}

.bp-auth-grad-bg .auth-bg-ribbon {
  transform-box: fill-box;
  transform-origin: 50% 50%;
  animation: auth-ribbon-drift 90s linear infinite;
  will-change: transform;
}

/* Tile pair scrolls as one unit - bbox is 2× period, so -50% == one seamless step.
   Shared duration/direction for every ribbon so crests stay phase-locked. */
.bp-auth-grad-bg .auth-bg-ribbon-scroll {
  animation: auth-ribbon-scroll 120s linear infinite;
  will-change: transform;
}

.bp-auth-grad-bg > :not(#auth-bg-svg) {
  position: relative;
  z-index: 1;
}

@keyframes auth-ribbon-scroll {
  0% { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

@keyframes auth-ribbon-drift {
  /* Keep scaleX fixed - changing it from transform-origin center shifts crest X. */
  0% {
    transform: translateY(calc(var(--ribbon-base-y, 0px) - 7px)) scale(1.07, var(--ribbon-base-scale-y, 1));
    opacity: 1;
  }

  50% {
    transform: translateY(calc(var(--ribbon-base-y, 0px) + 7px)) scale(1.07, calc(var(--ribbon-base-scale-y, 1) * .97));
    opacity: 1;
  }

  to {
    transform: translateY(calc(var(--ribbon-base-y, 0px) - 7px)) scale(1.07, var(--ribbon-base-scale-y, 1));
    opacity: 1;
  }
}

[data-theme=dark] #auth-bg-svg {
  /* Alphas live on each ribbon fill; don't double-dim the whole stack. */
  opacity: 1;
}

@media (prefers-reduced-motion: reduce) {
  .bp-auth-grad-bg .auth-bg-ribbon-scroll {
    animation: none !important;
  }
}

.bp-auth-layout,
.auth-page {
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-11);
  padding: clamp(var(--space-13), 2.5vw, var(--space-16));
}

.bp-auth-card,
.auth-card {
  width: min(100%, 420px);
  padding: var(--space-16);
  background: var(--c-surface);
  border: 1px solid transparent;
  border-radius: var(--bp-card-radius);
  box-shadow: var(--bp-shadow);
}

.bp-auth-card--wide,
.auth-card--wide {
  width: min(100%, 540px);
}

.bp-auth-logo,
.auth-logo {
  display: block;
  margin: 0 auto var(--space-15);
  height: 40px;
}

.bp-auth-title,
.auth-title {
  margin: 0 0 var(--space-14);
  font-size: 1.35rem;
  font-weight: 700;
  text-align: center;
  color: var(--c-text);
}

/* 6-box one-time-code entry (login 2FA) */
.otp-input {
  display: flex;
  justify-content: center;
  gap: var(--space-7);
  margin: var(--space-1) 0 0;
}

.otp-input__digit {
  box-sizing: border-box;
  width: 2.65rem;
  height: 3.1rem;
  padding: 0;
  border: 1px solid var(--c-border);
  border-radius: var(--radius, 8px);
  background: var(--c-bg, var(--bp-card-bg, #fff));
  color: var(--c-text);
  font-size: 1.35rem;
  font-weight: 650;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0;
  text-align: center;
  caret-color: var(--c-primary);
  outline: none;
  transition:
    border-color var(--dur, .18s) var(--ease-emphasis, ease),
    box-shadow var(--dur, .18s) var(--ease-emphasis, ease);
}

.otp-input__digit:hover:not(:disabled) {
  border-color: color-mix(in srgb, var(--c-primary) 35%, var(--c-border));
}

.otp-input__digit:focus {
  border-color: var(--c-primary);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--c-primary) 22%, transparent);
}

.otp-input__digit.is-error {
  border-color: var(--c-danger, #dc2626);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--c-danger, #dc2626) 18%, transparent);
}

@media (max-width: 380px) {
  .otp-input {
    gap: var(--space-4);
  }

  .otp-input__digit {
    width: 2.35rem;
    height: 2.85rem;
    font-size: 1.2rem;
  }
}

.bp-auth-footer,
.auth-footer {
  text-align: center;
  margin-top: var(--space-13);
  font-size: .875rem;
  color: var(--c-text-muted);
}

.auth-footer a {
  color: var(--c-primary);
  font-weight: 500;
}

.auth-footer a:hover {
  text-decoration: underline;
}

.auth-footer--stack {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-7);
}

.auth-footer__row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: var(--space-1);
}

.auth-footer__sep {
  color: var(--c-text-muted);
  user-select: none;
}

.bp-auth-divider,
.auth-divider {
  display: flex;
  align-items: center;
  gap: var(--space-11);
  margin: var(--space-3) 0;
  color: var(--c-text-muted);
  font-size: .8rem;
}

.auth-divider::before,
.auth-divider::after {
  content: "";
  flex: 1;
  height: 1px;
  background: color-mix(in srgb, var(--c-border) 88%, var(--c-text) 12%);
}

.auth-legal-consent {
  display: flex;
  align-items: flex-start;
  gap: var(--space-9);
  margin: var(--space-8) 0 0;
  cursor: pointer;
}

.auth-legal-consent .form-checkbox {
  margin-top: var(--space-1c);
  flex: 0 0 auto;
}

.auth-legal-consent__text {
  font-size: .82rem;
  color: var(--c-text-muted);
  line-height: 1.45;
  margin: 0;
}

.auth-legal-consent__text a {
  color: var(--c-primary);
  text-decoration: underline;
}

.bp-settings-row .auth-legal-consent {
  margin-top: var(--space-10);
  max-width: 36rem;
  width: 100%;
}

/* OAuth chip - same chrome as `.btn-secondary`, centered icon + label */
.btn-google {
  justify-content: center;
  gap: var(--space-8a);
}

.btn-google:hover {
  text-decoration: none;
}