/* Sign-in screen: full bleed, a solid Brand Blue panel carrying the tree on the left, the form on the
   right. The finished tree is the default paint; animations only add the drawing, and console.css turns
   every animation off when the device asks for reduced motion, which leaves the finished tree.
   Tokens only. */
.signin {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  min-block-size: 100vh;
}

.signin-panel {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: var(--cp-space-8);
  padding: 3.5rem 4rem;
  overflow: hidden;
  background: var(--cp-color-brand-surface-elevated);
  color: var(--cp-color-on-brand);
}
.signin-logo { position: relative; align-self: flex-start; display: block; }
.signin-logo img { display: block; block-size: 1.625rem; inline-size: auto; }
.signin-copy { position: relative; }
.signin-name { margin: 0; font-family: var(--cp-font-serif); font-size: clamp(3.5rem, 8vw, 6.5rem); line-height: 1; }
.signin-tag { margin: 1.25rem 0 0; font-family: var(--cp-font-serif); font-size: clamp(1.25rem, 1.9vw, 1.6rem); line-height: 1.25; text-wrap: balance; }
.signin-rule { inline-size: 4rem; block-size: 1px; margin: 1.375rem 0; background: var(--cp-color-accent); }
.signin-about { max-inline-size: 35rem; margin: 0; font-size: 1rem; line-height: 1.625rem; text-wrap: pretty; }

.signin-side {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--cp-space-8) var(--cp-space-6);
  background: var(--cp-color-bg);
  color: var(--cp-color-fg);
}
.signin-box { inline-size: min(21.25rem, 100%); }
.signin-box-dev { inline-size: min(24.5rem, 100%); }
.signin-box .alert { font-size: var(--cp-text-xs); line-height: var(--cp-text-xs-leading); }
.signin-box h1 { margin-block-end: var(--cp-space-2); font-size: 2.25rem; line-height: 1.1; }
.signin-welcome { margin: 0 0 var(--cp-space-4); font-size: var(--cp-text-base); line-height: 1.375rem; }
.signin-note { margin: var(--cp-space-3) 0 0; font-size: var(--cp-text-sm); line-height: var(--cp-text-sm-leading); }
.signin-form { display: flex; flex-direction: column; gap: var(--cp-space-3); }
.signin-kbs { display: flex; flex-direction: column; gap: var(--cp-space-2); margin: 0; padding: 0; border: 0; }
.signin-check { display: flex; align-items: center; gap: var(--cp-space-2); min-block-size: var(--cp-target-min); }
.signin-box .input,
.signin-box .select { max-inline-size: none; }

/* The call to action: Charcoal with Ivory text (Ivory with Charcoal text in dark), Brand Blue on hover. */
.signin-action {
  display: flex;
  align-items: center;
  justify-content: center;
  inline-size: 100%;
  block-size: 2.5rem;
  margin-block-start: var(--cp-space-4);
  border: 0;
  border-radius: var(--cp-radius-sm);
  background: var(--cp-color-cta);
  color: var(--cp-color-on-cta);
  font: var(--cp-weight-medium) var(--cp-text-sm) / 1 var(--cp-font-sans);
  text-decoration: none;
  cursor: pointer;
  transition: background-color var(--cp-duration-fast) ease-out;
}
.signin-action:hover { background: var(--cp-color-cta-hover); color: var(--cp-color-on-cta-hover); }
.signin-form .signin-action { margin-block-start: var(--cp-space-2); }
.signin-panel :focus-visible,
.signin-action:focus-visible { outline-color: var(--cp-color-focus-on-brand); }
.signin-side :focus-visible { outline-color: var(--cp-color-focus); }
.signin-action:focus-visible { outline-offset: 3px; outline-color: var(--cp-color-focus); }

/* The tree: pathlines and nodes, one stroke weight, rooted off the lower right. It fills the panel and
   sits behind the logo and the text, which keep clear of its lines. */
.ygg { position: absolute; inset: 0; inline-size: 100%; block-size: 100%; }
.ygg path {
  fill: none;
  stroke: var(--cp-color-blue-60);
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-dasharray: 1;
  stroke-dashoffset: 0;
  animation: ygg-draw 700ms ease-out calc(var(--i) * 70ms) backwards;
}
.ygg path.q { stroke: var(--cp-color-blue-80); }
.ygg circle { stroke: none; animation: ygg-appear 200ms ease-out calc(var(--i) * 70ms + 700ms) backwards; }
.ygg .n-gold { fill: var(--cp-color-accent); }
.ygg .n-ivory { fill: var(--cp-color-on-brand); }

@keyframes ygg-draw { from { stroke-dashoffset: 1; } to { stroke-dashoffset: 0; } }
@keyframes ygg-appear { from { opacity: 0; } to { opacity: 1; } }

/* Narrow: the panel stacks above the form. The whole tree is drawn as a square under the logo and the
   text sits below it, so nothing crosses the logo or the words. */
@media (width <= 52rem) {
  .signin { grid-template-columns: minmax(0, 1fr); }
  .signin-panel { min-block-size: 22rem; padding: var(--cp-space-6); }
  .ygg { inset: 3.5rem 0 auto auto; inline-size: min(100%, 24rem); block-size: auto; aspect-ratio: 1; }
  .signin-copy { margin-block-start: calc(min(100vw, 24rem) - 1rem); }
  .signin-name { font-size: 3.5rem; }
}