.auth-shell {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(360px, 0.78fr);
  width: min(100%, 1040px);
  min-height: 610px;
  margin: 0 auto;
  overflow: hidden;
  border: 1px solid var(--pl-border);
  border-radius: var(--pl-radius-lg);
  background: var(--pl-surface);
  box-shadow: var(--pl-shadow-md);
  text-align: left;
}

.auth-shell--wide {
  grid-template-columns: minmax(0, 0.72fr) minmax(540px, 1fr);
  width: min(100%, 1120px);
}

.auth-shell--compact {
  min-height: 540px;
}

.auth-intro {
  position: relative;
  display: flex;
  min-width: 0;
  flex-direction: column;
  justify-content: space-between;
  padding: clamp(2.2rem, 5vw, 4.7rem);
  overflow: hidden;
  isolation: isolate;
  background:
    radial-gradient(circle at 18% 80%, color-mix(in srgb, var(--pl-accent) 24%, transparent), transparent 38%),
    linear-gradient(145deg, var(--pl-surface-soft), var(--pl-surface));
}

.auth-intro::before,
.auth-intro::after {
  position: absolute;
  z-index: -1;
  width: 520px;
  height: 520px;
  border: 1px solid color-mix(in srgb, var(--pl-accent) 28%, transparent);
  border-radius: 50%;
  content: "";
}

.auth-intro::before {
  right: -360px;
  top: -255px;
}

.auth-intro::after {
  right: -275px;
  top: -340px;
}

.auth-intro-copy {
  position: relative;
  z-index: 2;
  max-width: 520px;
}

.auth-eyebrow,
.auth-card-kicker {
  margin: 0 0 var(--pl-space-3);
  color: var(--pl-accent-strong) !important;
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.auth-intro h1 {
  max-width: 600px;
  margin: 0;
  font-size: clamp(2.8rem, 6vw, 5.8rem);
  font-weight: 780;
  line-height: 0.96;
  letter-spacing: -0.065em;
}

.auth-shell--wide .auth-intro h1 {
  font-size: clamp(2.55rem, 5vw, 4.9rem);
}

.auth-description {
  max-width: 500px;
  margin: var(--pl-space-5) 0 0;
  font-size: clamp(1rem, 1.5vw, 1.18rem);
  line-height: 1.65;
}

.auth-principle {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  gap: var(--pl-space-3);
  margin: var(--pl-space-7) 0 0;
  color: var(--pl-ink) !important;
  font-size: 0.88rem;
  font-weight: 700;
}

.auth-principle span {
  display: grid;
  width: 34px;
  height: 34px;
  flex: 0 0 auto;
  place-items: center;
  border: 1px solid var(--pl-border-strong);
  border-radius: 50%;
  color: var(--pl-accent);
}

.auth-field-lines {
  position: absolute;
  inset: 0;
  z-index: -1;
  opacity: 0.5;
  pointer-events: none;
}

.auth-symbol {
  position: absolute;
  color: var(--pl-accent);
  font-family: Georgia, serif;
  line-height: 1;
  opacity: 0.12;
}

.auth-symbol--one {
  right: 9%;
  bottom: 16%;
  font-size: 7rem;
  transform: rotate(-11deg);
}

.auth-symbol--two {
  left: 11%;
  bottom: 31%;
  font-size: 4rem;
  transform: rotate(8deg);
}

.auth-symbol--three {
  right: 24%;
  top: 12%;
  font-size: 3.2rem;
}

.auth-card {
  display: flex;
  min-width: 0;
  flex-direction: column;
  justify-content: center;
  padding: clamp(2rem, 4vw, 4rem);
  border-left: 1px solid var(--pl-border);
  background: color-mix(in srgb, var(--pl-surface-raised) 94%, transparent);
}

.auth-card-header {
  margin-bottom: var(--pl-space-5);
}

.auth-card-header h2 {
  margin: 0;
  font-size: clamp(1.8rem, 3vw, 2.5rem);
  font-weight: 760;
  line-height: 1.05;
  letter-spacing: -0.045em;
}

.auth-card-header > p:last-child:not(.auth-card-kicker) {
  margin: var(--pl-space-3) auto 0;
}

.auth-card-header--centered {
  text-align: center;
}

.auth-form {
  display: grid;
  gap: var(--pl-space-4);
}

.auth-developer-login {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: var(--pl-space-4);
  margin: 0 0 var(--pl-space-5);
  padding: 0.8rem 0.9rem;
  border: 1px solid var(--pl-border);
  border-left: 3px solid var(--pl-accent);
  border-radius: var(--pl-radius-sm);
  color: var(--pl-ink);
  background: var(--pl-surface-soft);
}

.auth-developer-login > strong {
  font-size: 0.84rem;
}

.auth-developer-login dl,
.auth-developer-login dd {
  margin: 0;
}

.auth-developer-login dl {
  display: flex;
  gap: var(--pl-space-4);
}

.auth-developer-login dl > div {
  display: grid;
  grid-template-columns: auto auto;
  align-items: baseline;
  gap: var(--pl-space-2);
}

.auth-developer-login dt {
  color: var(--pl-muted);
  font-size: 0.7rem;
  font-weight: 700;
}

.auth-developer-login code {
  color: var(--pl-ink);
  font-family: var(--pl-font-mono);
  font-size: 0.82rem;
  font-weight: 750;
}

.auth-form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--pl-space-4);
}

.form-field {
  min-width: 0;
  margin: 0;
}

.form-label {
  margin-bottom: 0.42rem !important;
  font-size: 0.86rem;
  letter-spacing: 0.01em;
}

.auth-card .form-control,
.auth-card .form-select {
  min-height: 50px !important;
  padding: 0.76rem 0.88rem !important;
  border-radius: var(--pl-radius-sm) !important;
}

.auth-card .form-select {
  color: var(--pl-ink);
  border: 1px solid var(--pl-border-strong);
  background-color: var(--pl-field);
}

.form-help {
  margin: 0.42rem 0 0;
  color: var(--pl-muted) !important;
  font-size: 0.78rem;
  line-height: 1.45;
}

.form-errors {
  margin: 0.4rem 0 0;
  padding: 0;
  color: var(--pl-danger);
  font-size: 0.8rem;
  font-weight: 650;
  list-style: none;
}

.form-field--error .form-control,
.form-field--error .form-select {
  border-color: var(--pl-danger) !important;
}

.form-error-summary {
  margin: 0 0 var(--pl-space-5);
  padding: 0.9rem 1rem;
  border: 1px solid color-mix(in srgb, var(--pl-danger) 55%, var(--pl-border));
  border-radius: var(--pl-radius-sm);
  color: var(--pl-ink);
  background: color-mix(in srgb, var(--pl-danger) 9%, var(--pl-surface-raised));
}

.form-error-summary:focus {
  outline: 3px solid var(--pl-focus);
  outline-offset: 3px;
}

.form-error-summary ul {
  margin: 0.35rem 0 0;
  padding-left: 1.15rem;
  font-size: 0.82rem;
}

.form-error-summary a {
  color: var(--pl-ink);
}

.password-field {
  position: relative;
}

.password-field .form-control {
  padding-right: 4.2rem !important;
}

.password-toggle {
  position: absolute;
  top: 50%;
  right: 0.45rem;
  min-height: 34px !important;
  padding: 0.32rem 0.58rem !important;
  border: 0 !important;
  border-radius: 7px !important;
  color: var(--pl-muted) !important;
  background: transparent !important;
  font-size: 0.75rem !important;
  font-weight: 800 !important;
  transform: translateY(-50%) !important;
}

.password-toggle:hover,
.password-toggle:focus-visible {
  color: var(--pl-ink) !important;
  background: var(--pl-surface-soft) !important;
}

.auth-form-row {
  display: flex;
  align-items: center;
  gap: var(--pl-space-4);
}

.auth-form-row--between {
  justify-content: space-between;
}

.auth-check {
  display: flex;
  align-items: center;
  gap: var(--pl-space-2);
  margin: 0;
  min-height: 32px;
}

.auth-check .form-check-input {
  width: 1.05rem;
  height: 1.05rem;
  margin: 0;
  border-color: var(--pl-border-strong);
  background-color: var(--pl-field);
}

.auth-check .form-check-label {
  margin: 0;
  color: var(--pl-muted);
  font-size: 0.84rem;
  font-weight: 600;
}

.auth-submit {
  width: 100%;
  min-height: 50px !important;
  margin-top: var(--pl-space-1);
  color: var(--pl-on-accent) !important;
  border-color: var(--pl-accent) !important;
  background: var(--pl-accent) !important;
}

.auth-submit:hover,
.auth-submit:focus-visible {
  border-color: var(--pl-accent-hover) !important;
  background: var(--pl-accent-hover) !important;
}

.auth-submit--secondary {
  color: var(--pl-ink) !important;
  border-color: var(--pl-border-strong) !important;
  background: var(--pl-surface-soft) !important;
}

.auth-google-button {
  display: flex;
  width: 100%;
  min-height: 50px;
  align-items: center;
  justify-content: center;
  gap: 0.7rem;
  padding: 0.76rem 1rem;
  border: 1px solid var(--pl-border-strong);
  border-radius: var(--pl-radius-sm);
  color: var(--pl-ink) !important;
  background: var(--pl-surface-raised);
  font-size: 0.92rem;
  font-weight: 750;
  text-decoration: none;
  transition: border-color var(--pl-motion-fast) var(--pl-ease), background var(--pl-motion-fast) var(--pl-ease), transform var(--pl-motion-fast) var(--pl-ease);
}

.auth-google-button:hover,
.auth-google-button:focus-visible {
  border-color: var(--pl-accent);
  background: var(--pl-surface-soft);
  transform: translateY(-1px);
}

.auth-google-mark {
  display: grid;
  width: 1.45rem;
  height: 1.45rem;
  place-items: center;
  border: 1px solid var(--pl-border);
  border-radius: 50%;
  color: #4285f4;
  background: #fff;
  font-family: Arial, sans-serif;
  font-size: 0.86rem;
  font-weight: 800;
}

.auth-provider-divider {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: var(--pl-space-3);
  margin: var(--pl-space-4) 0;
  color: var(--pl-muted);
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
}

.auth-provider-divider::before,
.auth-provider-divider::after {
  height: 1px;
  background: var(--pl-border);
  content: "";
}

.auth-provider-account {
  margin: 0 0 var(--pl-space-5);
  color: var(--pl-muted);
  font-size: 0.9rem;
  line-height: 1.6;
}

.auth-provider-account strong {
  color: var(--pl-ink);
  overflow-wrap: anywhere;
}

.auth-switch {
  margin: var(--pl-space-5) 0 0;
  padding-top: var(--pl-space-4);
  border-top: 1px solid var(--pl-border);
  font-size: 0.84rem;
  text-align: center;
}

.auth-confirm-mark {
  display: grid;
  width: 76px;
  height: 76px;
  place-items: center;
  margin: 0 auto var(--pl-space-5);
  border: 1px solid var(--pl-border-strong);
  border-radius: 50%;
  color: var(--pl-accent);
  background: var(--pl-surface-soft);
}

.auth-confirm-mark svg {
  width: 42px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
}

@media (max-width: 900px) {
  .auth-shell,
  .auth-shell--wide {
    grid-template-columns: 1fr;
    width: min(100%, 700px);
  }

  .auth-intro {
    min-height: 340px;
    padding: clamp(2rem, 8vw, 3.5rem);
  }

  .auth-intro h1,
  .auth-shell--wide .auth-intro h1 {
    max-width: 560px;
    font-size: clamp(2.7rem, 10vw, 4.6rem);
  }

  .auth-principle {
    margin-top: var(--pl-space-6);
  }

  .auth-card {
    padding: clamp(2rem, 8vw, 3.6rem);
    border-top: 1px solid var(--pl-border);
    border-left: 0;
  }
}

@media (max-width: 560px) {
  .app-main:has(.auth-shell) {
    padding-top: var(--pl-space-3);
  }

  .auth-shell {
    border-radius: var(--pl-radius-md);
  }

  .auth-intro {
    min-height: 300px;
  }

  .auth-intro h1,
  .auth-shell--wide .auth-intro h1 {
    font-size: clamp(2.4rem, 13vw, 3.7rem);
  }

  .auth-card {
    padding: 1.6rem 1.25rem 1.8rem;
  }

  .auth-form-grid {
    grid-template-columns: 1fr;
  }

  .auth-form-row--between {
    align-items: flex-start;
    flex-direction: column;
    gap: var(--pl-space-2);
  }

  .auth-developer-login {
    grid-template-columns: 1fr;
    gap: var(--pl-space-2);
  }
}

.auth-shell--minimal {
  display: block;
  width: min(100%, 560px);
  min-height: 0;
}

.auth-shell--minimal[data-auth-screen="register"] {
  width: min(100%, 760px);
}

.auth-minimal-intro {
  padding: clamp(2rem, 5vw, 3rem) clamp(1.5rem, 6vw, 3.5rem) 0;
  text-align: left;
}

.auth-minimal-intro h1 {
  margin: 0;
  color: var(--pl-ink);
  font-size: clamp(2.2rem, 6vw, 3.35rem);
  font-weight: 780;
  line-height: 1;
  letter-spacing: -0.055em;
}

.auth-shell--minimal .auth-card {
  padding: clamp(1.5rem, 4vw, 2.25rem) clamp(1.5rem, 6vw, 3.5rem) clamp(2rem, 5vw, 3rem);
  border: 0;
  background: transparent;
}

@media (max-width: 560px) {
  .auth-minimal-intro {
    padding: 1.75rem 1.25rem 0;
  }

  .auth-shell--minimal .auth-card {
    padding: 1.35rem 1.25rem 1.75rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .auth-symbol {
    transform: none;
  }
}