/* sh-ui sign-in page (composition C, offset card on the left).
 * No colour literals: tokens from tokens.css and color-mix() only. */

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  background: var(--brand-navy);
  color: var(--ink-1);
  font-family: var(--font-sans);
  font-size: var(--text-md);
  line-height: var(--leading-body);
  min-height: 100vh;
}

/* ---------- Logo theme toggling ---------- */

.signin-logo--dark {
  display: none;
}

@media (prefers-color-scheme: dark) {
  html:not([data-theme="light"]) .signin-logo--light {
    display: none;
  }
  html:not([data-theme="light"]) .signin-logo--dark {
    display: inline-block;
  }
}

html[data-theme="dark"] .signin-logo--light {
  display: none;
}
html[data-theme="dark"] .signin-logo--dark {
  display: inline-block;
}
html[data-theme="light"] .signin-logo--dark {
  display: none;
}

/* ---------- Stage, illustration, scrim ---------- */

.signin-stage {
  align-items: center;
  background: var(--brand-navy);
  display: flex;
  justify-content: flex-start;
  min-height: 100vh;
  min-height: 100dvh;
  overflow: hidden;
  padding-left: 6vw;
  position: relative;
}

.signin-illu {
  height: 100%;
  left: 0;
  object-fit: cover;
  position: absolute;
  top: 0;
  width: 100%;
}

/* Left scrim: fully transparent before the middle of the screen, so the
   video's centre focal point stays vivid. */
.signin-scrim {
  background: linear-gradient(90deg,
    color-mix(in srgb, var(--brand-navy) 90%, var(--surface-1)) 0%,
    color-mix(in srgb, var(--brand-navy) 62%, transparent) 30%,
    transparent 42%);
  inset: 0;
  position: absolute;
}

.signin-inner {
  align-items: flex-start;
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  max-width: 400px;
  padding: var(--space-6) var(--space-4);
  position: relative;
  width: 400px;
}

/* ---------- Card, providers, banner, footer ---------- */

.signin-card {
  background: var(--surface-1);
  border: 1px solid var(--hairline);
  border-top: 3px solid var(--brand-amber);
  border-radius: var(--radius-2);
  box-shadow: var(--shadow-raised);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  max-width: 400px;
  padding: var(--space-6);
  width: 100%;
}

.signin-title {
  color: var(--ink-1);
  font-size: var(--text-hero);
  font-weight: var(--weight-regular);
  line-height: var(--leading-tight);
  margin: 0;
  overflow-wrap: anywhere;
}

.signin-title-strong {
  font-weight: var(--weight-strong);
}

.signin-subtitle {
  color: var(--ink-2);
  font-size: var(--text-base);
  margin: calc(-1 * var(--space-3)) 0 0;
}

.signin-providers {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.signin-provider {
  align-items: center;
  background: var(--surface-2);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-2);
  color: var(--ink-1);
  display: flex;
  font-weight: var(--weight-strong);
  gap: var(--space-3);
  justify-content: flex-start;
  min-height: 44px;
  padding: var(--space-3) var(--space-4);
  text-decoration: none;
}

.signin-provider:hover {
  border-color: var(--action);
  text-decoration: none;
}

.signin-provider--primary {
  background: var(--action);
  border-color: var(--action);
  color: var(--on-action);
}

.signin-provider--primary:hover {
  border-color: var(--focus-ring);
}

.signin-banner {
  align-items: center;
  background: color-mix(in srgb, var(--brand-amber) 14%, var(--surface-1));
  border: 1px solid var(--hairline);
  border-left: 3px solid var(--brand-amber);
  border-radius: var(--radius-2);
  color: var(--ink-1);
  display: flex;
  font-size: var(--text-sm);
  gap: var(--space-2);
  margin: 0;
  padding: var(--space-3) var(--space-4);
  width: 100%;
}

.signin-banner--critical {
  border-left-color: var(--status-critical);
}

.signin-banner--warning {
  border-left-color: var(--status-warning);
}

.signin-banner--info {
  border-left-color: var(--status-info);
}

.signin-note {
  color: var(--ink-2);
  font-size: var(--text-sm);
  margin: 0;
  text-align: center;
}

.signin-footer {
  align-items: center;
  color: color-mix(in srgb, var(--brand-amber) 80%, var(--brand-navy));
  display: flex;
  font-size: var(--text-sm);
  gap: var(--space-4);
  justify-content: flex-start;
}

.signin-footer a {
  color: color-mix(in srgb, var(--brand-amber) 80%, var(--brand-navy));
}

.signin-footer a:hover {
  color: var(--brand-amber);
}

.signin-version {
  font-family: var(--font-mono);
}

/* ---------- Icons, focus ---------- */

.signin-icon {
  flex-shrink: 0;
  height: 1.25em;
  width: 1.25em;
}

a:focus-visible {
  outline: 3px solid var(--focus-ring);
  outline-offset: 2px;
}

/* ---------- Reduced motion: poster as background, no video ---------- */


/* ---------- Phone layout: card full width at the bottom ---------- */

@media (max-width: 760px) {
  .signin-stage {
    flex-direction: column;
    justify-content: flex-end;
    padding: 0 max(16px, env(safe-area-inset-right, 0px)) 24px max(16px, env(safe-area-inset-left, 0px));
  }
  .signin-scrim {
    background: linear-gradient(to top,
      color-mix(in srgb, var(--brand-navy) 94%, var(--surface-1)) 0%,
      color-mix(in srgb, var(--brand-navy) 65%, transparent) 55%,
      transparent 100%);
  }
  .signin-inner {
    max-width: none;
    width: 100%;
  }
  .signin-title {
    font-size: clamp(26px, 8vw, 36px);
  }
}

@media (max-width: 480px) {
  .signin-title {
    font-size: var(--text-lg);
  }
  .signin-card {
    padding: var(--space-5);
  }
}

/* Last, so that it wins over the phone layout too. */
@media (prefers-reduced-motion: reduce) {
  .signin-illu {
    display: none;
  }
  .signin-stage {
    background-image: url("signin/illu-poster.jpg");
    background-position: center;
    background-size: cover;
  }
  .signin-scrim {
    background: color-mix(in srgb, var(--brand-navy) 35%, transparent);
  }
}