@layer m1-auth {
  .auth-page main {
    display: grid;
    min-height: calc(100vh - 76px);
    place-items: start center;
    padding: clamp(3rem, 7vw, 6rem) 24px;
    background: var(--m1-canvas);
  }
  .auth-split {
    display: grid;
    width: min(100%, 1080px);
    grid-template-columns: minmax(350px, .88fr) minmax(0, 1.12fr);
    overflow: hidden;
    border: 1px solid var(--m1-border);
    border-radius: var(--m1-radius-lg);
    background: var(--m1-surface);
    box-shadow: 0 28px 72px rgba(9, 17, 31, .10);
  }
  .auth-brand-pane {
    min-height: 100%;
    padding: clamp(2.35rem, 4vw, 3.5rem);
    background: #0b1320;
    color: #fff;
  }
  .auth-brand-pane__content {
    display: flex;
    min-height: 100%;
    flex-direction: column;
    justify-content: center;
  }
  .auth-brand-pane__logo {
    display: inline-flex;
    align-self: flex-start;
    margin-bottom: 2.4rem;
  }
  .auth-brand-pane__logo img {
    /* The on-dark brand asset is already colored for this navy pane -- do
       not invert it. */
    width: 104px;
    height: auto;
  }
  .auth-brand-pane h2 {
    max-width: 14ch;
    margin-bottom: 1.75rem;
    color: #fffdf8;
    font-size: clamp(1.8rem, 3vw, 2.5rem);
    font-weight: 540;
    letter-spacing: -.04em;
    line-height: 1.08;
  }
  .auth-brand-pane__list {
    display: grid;
    gap: .95rem;
    margin: 0;
    padding: 0;
    list-style: none;
  }
  .auth-brand-pane__list li {
    position: relative;
    padding-left: 1.15rem;
    color: #aab3c0;
    font-size: .84rem;
    line-height: 1.55;
  }
  .auth-brand-pane__list li::before {
    position: absolute;
    top: .55rem;
    left: 0;
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: #8ea8c3;
    content: "";
  }
  .auth-brand-pane__visual {
    margin: 2.6rem 0 0;
  }
  .auth-brand-pane__visual img {
    width: 100%;
    aspect-ratio: 16 / 7;
    object-fit: cover;
    border: 1px solid rgba(142,168,195,.18);
    border-radius: 10px;
    background: #07101d;
  }
  .auth-brand-pane__visual figcaption {
    margin-top: .7rem;
    color: #717d8d;
    font-size: .65rem;
    font-weight: 650;
    letter-spacing: .1em;
    text-transform: uppercase;
  }
  .auth-form-pane,
  .auth-shell {
    min-width: 0;
  }
  .auth-form-pane {
    display: block;
    padding: 0;
    background: #fff;
  }
  .auth-shell {
    display: grid;
    width: auto;
    min-height: 100%;
    place-items: center;
    margin: 0;
    padding: clamp(2.25rem, 5vw, 4.25rem);
  }
  .auth-card {
    width: min(100%, 520px);
    padding: 0;
    border: 0;
    background: transparent;
    box-shadow: none;
  }
  .auth-header {
    margin-bottom: 2rem;
  }
  .auth-header .page-eyebrow,
  .auth-card > .page-eyebrow {
    display: block;
    margin-bottom: .6rem;
    color: var(--m1-business-accent-strong);
    font-size: .72rem;
    font-weight: 720;
    letter-spacing: .13em;
    text-transform: uppercase;
  }
  .auth-header h1,
  .auth-card > h1 {
    margin-bottom: .7rem;
    font-size: clamp(2.15rem, 4vw, 3rem);
    font-weight: 590;
    letter-spacing: -.045em;
  }
  .auth-header p,
  .auth-card > p {
    margin-bottom: 0;
    color: var(--m1-ink-muted);
    line-height: 1.7;
  }
  .auth-header a {
    font-weight: 680;
  }
  .auth-form {
    display: grid;
    gap: 1.5rem;
  }
  .form-stack {
    display: grid;
    gap: 1.15rem;
  }
  .form-row {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1.1rem;
  }
  .form-group {
    display: grid;
    min-width: 0;
    gap: .48rem;
  }
  .form-help {
    color: var(--m1-ink-muted);
    font-size: .76rem;
    line-height: 1.5;
  }
  .auth-actions {
    display: grid;
    gap: .85rem;
    padding-top: .6rem;
  }
  .auth-actions .btn-block {
    min-height: 50px;
  }
  .btn-block {
    width: 100%;
  }
  .auth-link-row {
    margin: 0;
    color: var(--m1-ink-muted);
    font-size: .82rem;
    line-height: 1.5;
    text-align: center;
  }
  .auth-link-row a {
    color: var(--m1-ink);
    font-weight: 680;
  }
  .auth-centered {
    text-align: center;
  }
  .auth-success-icon,
  .status-icon {
    display: grid;
    width: 58px;
    height: 58px;
    place-items: center;
    margin: 0 auto 1.35rem;
    border: 1px solid #acd4c3;
    border-radius: 50%;
    background: var(--m1-success-soft);
    color: var(--m1-success);
  }
  .auth-success-icon svg,
  .status-icon svg {
    width: 24px;
    height: 24px;
  }
  .status-icon--error {
    border-color: #e6b9b9;
    background: var(--m1-danger-soft);
    color: var(--m1-danger);
  }
  .auth-card .alert {
    margin-bottom: 1.2rem;
    text-align: left;
  }
  @media (max-width: 840px) {
    .auth-split {
      grid-template-columns: minmax(285px, .7fr) minmax(0, 1.3fr);
    }
    .auth-brand-pane {
      padding: 2.2rem;
    }
    .auth-brand-pane__visual {
      margin-top: 2rem;
    }
  }
  @media (max-width: 760px) {
    .auth-page main {
      min-height: calc(100vh - 66px);
      padding: 1.5rem 14px 3rem;
    }
    .auth-split {
      grid-template-columns: 1fr;
      border-radius: var(--m1-radius-md);
      box-shadow: 0 18px 48px rgba(9, 17, 31, .08);
    }
    .auth-brand-pane {
      display: none;
    }
    .auth-shell {
      padding: 2rem 1.25rem;
    }
    .form-row {
      grid-template-columns: 1fr;
    }
  }

  /* ------------------------------------------------------------------ *
   * Auth on phones. Owned here with the rest of the auth component:
   * one component, one file. Shared form primitives (.form-stack,
   * .form-row, .form-group) stay in m1-mobile-density.css.
   * ------------------------------------------------------------------ */
  @media (max-width: 900px) {
    .auth-page main {
      min-height: auto;
      padding: 18px var(--m1-mobile-page-gutter) 28px;
      place-items: start center;
    }
    .auth-shell {
      padding: var(--m1-mobile-card-padding);
      min-height: auto;
      width: min(100%, 520px);
      margin: 0 auto;
    }
    .auth-card {
      padding: 0;
      border: 0;
      box-shadow: none;
      background: transparent;
    }
    .auth-header {
      margin-bottom: var(--m1-mobile-section-gap);
    }
    .auth-header h1 {
      font-size: clamp(1.75rem, 6vw, 2.4rem);
      margin-bottom: 6px;
    }
    .auth-header p {
      line-height: 1.6;
    }
    .auth-form {
      gap: var(--m1-mobile-field-gap);
    }
    .auth-actions {
      gap: 10px;
      padding-top: 8px;
    }
    .auth-actions .btn-block {
      min-height: var(--m1-mobile-button-height);
    }
  }

  /* ------------------------------------------------------------------ *
   * Carried over from m1-design-system.css so this file is the only
   * owner of the auth composition. These are the declarations the
   * design-system copy still contributed; every other property in it
   * was already overridden here.
   * ------------------------------------------------------------------ */
  .auth-actions {
    border-top: 1px solid var(--color-border);
    margin-top: var(--space-6);
  }
  .auth-actions .btn {
    width: 100%;
  }
  .auth-brand-pane {
    align-items: center;
    display: flex;
    overflow: hidden;
    position: relative;
  }
  .auth-brand-pane__content {
    margin-inline: auto;
    max-width: 24rem;
  }
  .auth-brand-pane__list {
    margin-top: var(--space-8);
  }
  .auth-card {
    border-radius: var(--radius-lg);
  }
  .auth-centered > p {
    margin: var(--space-3) auto 0;
    max-width: 30rem;
  }
  .auth-form-pane {
    align-items: center;
  }
  .auth-form-pane .auth-shell {
    margin: 0 auto;
  }
  .auth-header {
    text-align: center;
  }
  .auth-header p {
    margin-top: var(--space-2);
  }
  .auth-link-row a {
    text-decoration: none;
  }
  .auth-split {
    /* display and grid-template-columns are already set above; only the
       full-height framing came from the old design-system copy. */
    min-height: calc(100vh - var(--nav-height));
  }
  body.auth-page > main {
    align-items: start;
    display: grid;
  }
  @media (max-width: 900px) {
    .auth-brand-pane {
      display: none;
    }
    .auth-split {
      display: block;
      min-height: auto;
    }
  }
}