.auth-modal {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 2000;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: var(--color-overlay);
}
.auth-modal.active {
  display: flex;
}

.auth-panel {
  position: relative;
}
.auth-back {
  position: absolute;
  top: -20%;
  right: 5%;
  display: inline-flex;
  justify-content: center;
  align-items: center;
  min-height: var(--control-height);
  padding: 0 12px;
  cursor: pointer;
  background: var(--color-button-secondary-bg);
  color: var(--color-button-secondary-text);
  border-radius: var(--radius-control);
  border: 1px solid var(--color-border-muted);
  margin: 0;
  transition:
    background-color var(--component-transition),
    border-color var(--component-transition),
    box-shadow var(--component-transition),
    transform var(--component-transition);
}
.auth-back:hover {
  background: var(--color-card-bg-hover);
  border-color: var(--color-primary);
}
.auth-back svg {
  fill: currentColor;
}
.auth-back:focus-visible {
  outline: none;
  box-shadow: var(--component-focus-shadow);
}
.auth-back:active {
  transform: scale(0.98);
}
.auth-modal img {
  width: 650px;
  height: 530px;
  border-radius: var(--radius-card-lg);
  padding: 20px;
  object-fit: cover;
}
.auth-card {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100%;
  max-width: 1100px;
  height: 500px;
  border: 1px solid var(--color-border-muted);
  background: var(--color-surface);
  border-radius: var(--radius-card-lg);
  box-shadow: var(--shadow-lg);
}
.auth-panel {
  display: block;
  padding: 30px;
}
.auth-form .brand-title strong {
  display: inline-flex;
  align-items: center;
  margin-left: 3px;
  padding: 0.05em 0.3em 0.08em;
  border-radius: 0.24em;
  background: var(--primary-color-hover);
  color: var(--bg-color);
  font-weight: 900;
  line-height: 1;
  letter-spacing: 0;
}
.auth-form > p {
  font-size: 12px;
}
.auth-form > p > a {
  color: var(--color-link);
}
.auth-form > p > a:hover {
  color: var(--color-link-hover);
}

.auth-form .forgot {
  color: var(--color-text-soft);
  font-size: 10px;
}
.auth-form input {
  margin-top: 14px;
  padding: 0 18px;
}

.auth-form button {
  width: 100%;
  margin-top: 10px;
  padding: 0 var(--control-padding-x);
  background: var(--color-button-primary-bg);
  color: var(--color-button-primary-text);
}
.auth-form button:hover {
  background: var(--color-primary-hover);
}
.auth-errors {
  margin: 10px 0;
  padding: 10px;
  border: 1px solid var(--color-danger);
  border-radius: var(--radius-control);
  background: var(--color-danger-soft);
}

.auth-errors p {
  margin: 4px 0;
  color: var(--color-danger);
  font-size: 13px;
}

.auth-page {
  min-height: calc(100vh - 120px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 120px 24px 64px;
}

.auth-page-card {
  width: min(100%, 980px);
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 420px);
  overflow: hidden;
  border: 1px solid var(--color-border-muted);
  border-radius: var(--radius-card-lg);
  background: var(--color-surface);
  box-shadow: var(--shadow-lg);
}

.auth-page-media img {
  width: 100%;
  height: 100%;
  min-height: 520px;
  display: block;
  object-fit: cover;
}

.auth-page-panel {
  display: flex;
  align-items: center;
  padding: 36px;
}

.auth-register-form {
  width: 100%;
}

.auth-register-form h1 {
  margin: 16px 0 8px;
  color: var(--color-text);
  font-size: 1.8rem;
}

@media (max-width: 820px) {
  .auth-page-card {
    grid-template-columns: 1fr;
  }

  .auth-page-media {
    display: none;
  }
}

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