@layer legacy {
/* AIOS sign-in — same neutral ChatGPT-style surface as the app shell
   (reads the --cg-* tokens from aios-chatgpt-refine.css), with one
   restrained liquid-glass card as the calm, deliberate accent. */

.simple-login-page {
  position: relative;
  min-height: 100dvh;
  display: grid;
  place-items: center;
  padding: clamp(22px, 5vw, 60px);
  overflow: hidden;
  color: var(--cg-text);
  background: var(--cg-bg);
}

.simple-login-page::before,
.simple-login-page::after {
  content: "";
  position: absolute;
  width: min(38vw, 420px);
  aspect-ratio: 1;
  border-radius: 999px;
  filter: blur(90px);
  opacity: 0.5;
  pointer-events: none;
}

.simple-login-page::before {
  left: -140px;
  top: -120px;
  background: var(--cg-accent);
  opacity: 0.16;
}

.simple-login-page::after {
  right: -160px;
  bottom: -140px;
  background: var(--cg-accent);
  opacity: 0.1;
}

.simple-login-theme {
  position: fixed;
  z-index: calc(var(--z-raised) + 3);
  top: max(18px, env(safe-area-inset-top));
  right: max(18px, env(safe-area-inset-right));
  width: 44px;
  height: 44px;
  border: 1px solid var(--cg-line);
  border-radius: 999px;
  display: grid;
  place-items: center;
  color: var(--cg-text);
  background: color-mix(in srgb, var(--cg-surface) 78%, transparent);
  box-shadow: none;
  backdrop-filter: blur(20px) saturate(160%);
  -webkit-backdrop-filter: blur(20px) saturate(160%);
}

.simple-login-theme:hover {
  background: var(--cg-surface-hover);
}

/* Way back to the marketing site: the site links into sign-in from every page,
   so the return path has to exist too. */
.simple-login-back {
  position: fixed;
  z-index: calc(var(--z-raised) + 3);
  top: max(18px, env(safe-area-inset-top));
  left: max(18px, env(safe-area-inset-left));
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 16px;
  border: 1px solid var(--cg-line);
  border-radius: 999px;
  color: var(--cg-muted);
  background: color-mix(in srgb, var(--cg-surface) 78%, transparent);
  font-size: 0.85rem;
  font-weight: 600;
  text-decoration: none;
  backdrop-filter: blur(20px) saturate(160%);
  -webkit-backdrop-filter: blur(20px) saturate(160%);
}

.simple-login-back:hover {
  color: var(--cg-text);
  background: var(--cg-surface-hover);
}

.simple-login-note {
  margin: 0;
  color: var(--cg-muted);
  font-size: 0.8rem;
  line-height: 1.5;
  text-align: center;
}

.simple-login-card {
  position: relative;
  z-index: var(--z-raised);
  width: min(440px, 100%);
  display: grid;
  gap: 22px;
  padding: clamp(24px, 5vw, 36px);
  border: 1px solid var(--cg-line);
  border-radius: 20px;
  color: var(--cg-text);
  background: color-mix(in srgb, var(--cg-elevated) 86%, transparent);
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.28);
  backdrop-filter: blur(28px) saturate(160%);
  -webkit-backdrop-filter: blur(28px) saturate(160%);
  animation: simpleLoginIn 420ms cubic-bezier(0.2, 0.8, 0.2, 1) both;
}

.simple-login-brand {
  position: relative;
  display: grid;
  gap: 16px;
}

.simple-login-brand .brand-mark.aios-logo-mark {
  width: 132px !important;
  height: auto !important;
  min-height: 48px;
  max-width: 132px !important;
  max-height: 72px !important;
  justify-content: flex-start;
  background: transparent;
  box-shadow: none;
}

.simple-login-brand .aios-logo-image {
  width: 132px !important;
  height: auto !important;
  max-width: 132px !important;
  max-height: 72px !important;
  object-fit: contain;
}

.simple-login-brand .eyebrow {
  display: inline-flex;
  width: fit-content;
  padding: 6px 11px;
  border: 1px solid var(--cg-line);
  border-radius: 999px;
  color: var(--cg-muted);
  background: var(--cg-accent-soft);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
}

.simple-login-brand h1 {
  margin: 10px 0 0;
  color: var(--cg-text);
  font-size: clamp(1.7rem, 5vw, 2.15rem);
  line-height: 1.15;
  letter-spacing: 0;
}

.simple-login-brand p {
  max-width: 40ch;
  margin: 8px 0 0;
  color: var(--cg-muted);
  font-size: 0.95rem;
  line-height: 1.5;
}

.simple-login-form {
  position: relative;
  display: grid;
  gap: 12px;
}

.simple-login-form.form-grid {
  grid-template-columns: 1fr;
  gap: 12px;
}

.simple-login-form .field,
.simple-login-form .field.full {
  margin: 0;
  min-width: 0;
}

.simple-login-form label {
  color: var(--cg-muted);
  font-weight: 650;
  font-size: 0.82rem;
}

.simple-login-form input,
.simple-login-form select {
  min-height: 48px;
  border: 1px solid var(--cg-line) !important;
  border-radius: var(--cg-radius);
  color: var(--cg-text) !important;
  background: var(--cg-surface) !important;
  box-shadow: none;
}

/* "Stay signed in" is a single checkbox row, not a field: the 48px control
   height above turned it into a block twice the size of the label it carries. */
.simple-login-form .check {
  align-items: center;
  gap: 10px;
  min-height: 44px;
  padding: 8px 12px;
  border-radius: var(--cg-radius);
  font-size: 0.82rem;
  font-weight: 600;
  line-height: 1.3;
  cursor: pointer;
}

.simple-login-form .check input[type="checkbox"] {
  min-height: 0;
  margin: 0;
  cursor: pointer;
}

.simple-login-form input:focus,
.simple-login-form select:focus {
  border-color: var(--cg-accent) !important;
  box-shadow: 0 0 0 3px var(--cg-accent-soft);
  outline: none;
}

.simple-login-form .primary {
  width: 100%;
  min-height: 48px;
  border-radius: var(--cg-radius);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  color: #fff;
  background: var(--cg-accent);
  box-shadow: none;
}

.simple-login-form .primary:hover {
  background: color-mix(in srgb, var(--cg-accent) 88%, black);
}

.simple-login-form .simple-login-submit.is-loading,
.simple-login-form .simple-login-submit.is-loading:hover {
  cursor: wait;
  background: var(--cg-accent);
  opacity: 0.9;
}

.simple-login-spinner {
  display: none;
  width: 18px;
  height: 18px;
  flex: 0 0 18px;
  border: 2px solid color-mix(in srgb, currentColor 35%, transparent);
  border-top-color: currentColor;
  border-radius: 999px;
}

.simple-login-submit.is-loading .simple-login-spinner {
  display: block;
  animation: simpleLoginSpin 700ms linear infinite;
}

.simple-login-footer {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
}

.simple-login-footer .cloud-sync {
  margin: 0;
}

.simple-login-footer .ghost {
  min-height: 38px;
  border-radius: 999px;
  color: var(--cg-muted);
  border: 1px solid var(--cg-line);
  background: transparent;
}

.simple-login-footer .ghost:hover {
  background: var(--cg-surface);
  color: var(--cg-text);
}

@keyframes simpleLoginIn {
  from {
    opacity: 0;
    transform: translateY(14px) scale(0.98);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@keyframes simpleLoginSpin {
  to {
    transform: rotate(1turn);
  }
}

@media (max-width: 640px) {
  .simple-login-page {
    min-height: 100dvh;
    height: 100dvh;
    place-items: center;
    align-content: center;
    padding: max(24px, env(safe-area-inset-top)) 16px max(24px, env(safe-area-inset-bottom));
    overflow-x: hidden;
    overflow-y: auto;
  }

  .simple-login-card {
    gap: 16px;
    padding: 20px;
    border-radius: 18px;
  }

  .simple-login-brand .brand-mark.aios-logo-mark,
  .simple-login-brand .aios-logo-image {
    width: 108px !important;
    max-width: 108px !important;
    max-height: 58px !important;
    min-height: 38px;
  }

  .simple-login-brand h1 {
    margin-top: 6px;
    font-size: clamp(1.5rem, 8vw, 1.9rem);
  }

  .simple-login-brand p {
    margin-top: 6px;
    font-size: 0.88rem;
    line-height: 1.42;
  }

  .simple-login-form,
  .simple-login-form.form-grid {
    gap: 10px;
  }

  .simple-login-footer {
    gap: 8px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .simple-login-card {
    animation: none;
  }

  .simple-login-submit.is-loading .simple-login-spinner {
    animation: none;
  }
}
}