/* Sign-in page (spec "Sign in", ADR 0001). Outside .app: one centered column, no breakpoints.
   Tokens only, so it follows the active theme (dark by default). */
.signin {
  position: relative;
  min-height: 100vh;
  overflow: hidden;
  display: flex;
  justify-content: center;
  padding: 28px 24px;
  background: var(--bg);
  color: var(--ink);
}
.signin-glow {
  position: absolute;
  left: 50%;
  top: -220px;
  width: 560px;
  height: 420px;
  transform: translateX(-50%);
  border-radius: 50%;
  background: radial-gradient(ellipse, color-mix(in srgb, var(--accent), transparent 84%), transparent 65%);
  pointer-events: none;
}
.signin-col {
  position: relative;
  width: 100%;
  max-width: 342px;
  display: flex;
  flex-direction: column;
}
.signin-brand {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding-top: 40px;
  font-size: 15px;
}
.signin-head {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  text-align: center;
  margin: 72px 0 40px;
}
.signin-title {
  margin: 0;
  font-family: var(--font-serif), Georgia, serif;
  font-size: 40px;
  font-weight: 600;
  line-height: 1.05;
  color: var(--ink);
}
.signin-title em { font-style: italic; font-weight: 500; }
.signin-rule {
  width: 48px;
  height: 1px;
  background: linear-gradient(90deg, transparent, color-mix(in srgb, var(--ink), transparent 40%), transparent);
}
.signin-form { display: flex; flex-direction: column; gap: 12px; }
.signin-label {
  margin: 0;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--ink-3);
}
.signin-label-next { margin-top: 6px; }
.signin-field {
  display: flex;
  align-items: center;
  gap: 10px;
  height: 52px;
  padding: 0 16px;
  border-radius: var(--r-ctl);
  background: var(--tile-2);
  color: var(--ink-3);
  box-shadow: inset 0 0 0 1px var(--line-2);
  transition: box-shadow .25s;
}
.signin-field:focus-within {
  box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--ink), transparent 45%), 0 0 0 4px color-mix(in srgb, var(--ink), transparent 94%);
}
.signin-field svg { width: 18px; height: 18px; flex: none; }
.signin-field input {
  flex: 1;
  min-width: 0;
  height: 100%;
  margin: 0;
  padding: 0;
  border: 0;
  border-radius: 0;
  outline: 0;
  background: transparent;
  font: inherit;
  font-size: 15px;
  color: var(--ink);
}
.signin-field input::placeholder { color: var(--ink-3); }
.signin-form .signin-submit { margin-top: 18px; width: 100%; height: 54px; }
.signin-error { margin: 0; padding: 10px 12px; border: 1px solid var(--accent); border-radius: 8px; color: var(--danger); background: var(--accent-soft); font-size: 14px; }