/* ==========================================================================
   Auth screen — clean_corporate_style split layout
   Left: gradient brand panel. Right: white form card on app-bg.
   ========================================================================== */

body.auth {
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: 100vh;
}
@media (max-width: 900px) {
  body.auth { grid-template-columns: 1fr; }
}

/* ----- left side panel: the only allowed multi-stop gradient ----- */
.auth__panel {
  position: relative;
  background: var(--gradient-brand);
  color: var(--color-text-inverse);
  padding: var(--space-12) var(--space-10);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  border-top-right-radius: var(--radius-3xl);
  border-bottom-right-radius: var(--radius-3xl);
  overflow: hidden;
}
@media (max-width: 900px) {
  .auth__panel {
    border-radius: 0;
    padding: var(--space-8) var(--space-6);
    min-height: 240px;
  }
}

.auth__panel-inner {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: var(--space-6);
  max-width: 360px;
}

.auth__mark {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: rgba(245, 235, 224, 0.12);
  display: grid;
  place-items: center;
}
.auth__mark img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: brightness(0) invert(1);
  opacity: 0.92;
}

.auth__wordmark {
  display: flex;
  flex-direction: column;
  font-family: var(--font-brand);
  font-style: italic;
  letter-spacing: var(--tracking-tighter);
  line-height: 1;
}
.auth__wm-top {
  font-size: var(--text-3xl);
  font-weight: var(--weight-semibold);
}
.auth__wm-bot {
  font-size: var(--text-lg);
  font-weight: var(--weight-medium);
  opacity: 0.74;
  margin-top: var(--space-1);
}

.auth__tagline {
  margin: 0;
  font-size: var(--text-sm);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  opacity: 0.74;
}

.auth__panel-footer {
  font-size: var(--text-xs);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  opacity: 0.6;
}

/* ----- right form area ----- */
.auth__form-area {
  display: grid;
  place-items: center;
  padding: var(--space-8) var(--space-6);
  background: var(--color-app-bg);
}

.auth__card {
  width: 100%;
  max-width: 380px;
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-card);
  padding: var(--space-8) var(--space-6);
  animation: shell-page-in 320ms cubic-bezier(0.16, 1, 0.3, 1);
}

.auth__head { margin-bottom: var(--space-6); }
.auth__eyebrow {
  display: block;
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wider);
  color: var(--color-text-muted);
  margin-bottom: var(--space-2);
}
.auth__title {
  margin: 0 0 var(--space-2);
  font-size: var(--text-2xl);
  font-weight: var(--weight-light);
  letter-spacing: var(--tracking-tight);
  color: var(--color-primary-deep);
  line-height: var(--leading-tight);
}
.auth__sub {
  margin: 0;
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: var(--leading-snug);
}

.auth__form {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}
.field {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}
.field__label {
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--color-text-strong);
}
.field__error {
  margin: 0;
  font-size: var(--text-xs);
  color: var(--color-danger);
}

.input {
  display: block;
  width: 100%;
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-text);
  background: var(--color-surface);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-quick), box-shadow var(--transition-quick);
  outline: none;
}
.input::placeholder { color: var(--color-text-subtle); }
.input:focus-visible {
  border-color: var(--color-primary);
  box-shadow: var(--focus-ring);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  line-height: 1;
  cursor: pointer;
  border: 1px solid transparent;
  outline: none;
  transition: background-color var(--transition-quick),
              color var(--transition-quick);
}
.btn:focus-visible { box-shadow: var(--focus-ring); }
.btn--primary {
  background: var(--color-primary);
  color: var(--color-primary-fg);
}
.btn--primary:hover { background: var(--color-primary-deep); }
.btn--block { width: 100%; margin-top: var(--space-2); }