body[data-route="signin"] {
  margin: 0;
  background: var(--cb-brand-950);
  color: var(--cb-text);
  font-family: var(--cb-font-body);
}

body[data-route="signin"] #main { min-height: 100dvh; }
body[data-route="signin"] .scroll-progress { display: none; }

.signin-stage {
  position: relative;
  min-height: 100dvh;
  overflow: hidden;
  isolation: isolate;
  background:
    radial-gradient(circle at 12% 12%, rgba(200, 243, 110, .12), transparent 30rem),
    linear-gradient(135deg, var(--cb-brand-950) 0%, #063326 58%, #0a4b38 100%);
}

.signin-stage::before {
  position: absolute;
  inset: 0;
  z-index: -1;
  content: "";
  opacity: .16;
  background-image: linear-gradient(rgba(255,255,255,.12) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.12) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: linear-gradient(to right, #000, transparent 70%);
}

.signin-ambient {
  position: absolute;
  z-index: -1;
  width: 28rem;
  aspect-ratio: 1;
  border-radius: 50%;
  filter: blur(70px);
  opacity: .16;
  animation: signin-breathe 7s var(--cb-ease-standard) infinite alternate;
}

.signin-ambient-one { top: -10rem; right: 18%; background: var(--cb-accent); }
.signin-ambient-two { bottom: -13rem; left: -8rem; background: #3ba07c; animation-delay: -3s; }

.signin-layout {
  width: min(100%, 96rem);
  min-height: 100dvh;
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 1.12fr) minmax(25rem, .88fr);
}

.signin-story {
  min-width: 0;
  padding: clamp(2rem, 5vw, 5rem);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  color: var(--cb-text-inverse);
}

.signin-brand,
.signin-mobile-brand {
  display: inline-flex;
  align-items: center;
  gap: .75rem;
  color: var(--cb-text-inverse);
  text-decoration: none;
  letter-spacing: .08em;
}

.signin-brand img { width: 3.25rem; height: 3.25rem; object-fit: contain; }
.signin-brand span { display: grid; gap: .1rem; }
.signin-brand strong { font: 800 1.25rem/1 var(--cb-font-display); }
.signin-brand small { color: rgba(247,255,242,.7); font-size: .72rem; letter-spacing: .02em; }

.signin-story-copy { max-width: 46rem; margin: clamp(3rem, 8vh, 7rem) 0 2rem; }
.signin-eyebrow { display: block; margin-bottom: 1rem; color: var(--cb-accent); font: 700 .75rem/1 var(--cb-font-mono); letter-spacing: .18em; }
.signin-story h1 { margin: 0; max-width: 13ch; color: var(--cb-text-inverse); font: 700 clamp(2.8rem, 5.2vw, 5.8rem)/.96 var(--cb-font-display); letter-spacing: -.055em; }
.signin-story h1 em { color: var(--cb-accent); font-style: normal; font-weight: 500; }
.signin-story-copy > p { max-width: 38rem; margin: 1.5rem 0 0; color: rgba(247,255,242,.75); font-size: clamp(1rem, 1.25vw, 1.16rem); line-height: 1.7; }

.signin-orbit {
  position: absolute;
  right: 42%;
  top: 35%;
  width: 10rem;
  aspect-ratio: 1;
  display: grid;
  place-items: center;
  opacity: .9;
  transform: translateY(-50%);
}

.signin-orbit > img { width: 5.5rem; height: 5.5rem; object-fit: contain; filter: drop-shadow(0 20px 32px rgba(0,0,0,.35)); animation: signin-float 4s var(--cb-ease-standard) infinite alternate; }
.signin-orbit-line { position: absolute; inset: 0; border: 1px solid rgba(200,243,110,.34); border-radius: 50%; animation: signin-orbit 18s linear infinite; }
.signin-orbit-line::after { position: absolute; top: -.3rem; left: 50%; width: .6rem; height: .6rem; border-radius: 50%; background: var(--cb-accent); box-shadow: 0 0 24px var(--cb-accent); content: ""; }
.orbit-node { position: absolute; padding: .38rem .6rem; border: 1px solid rgba(255,255,255,.14); border-radius: var(--cb-radius-pill); background: rgba(2,26,19,.74); color: rgba(247,255,242,.82); font: 600 .58rem/1 var(--cb-font-mono); letter-spacing: .14em; }
.orbit-node-one { top: 6%; right: -1rem; }
.orbit-node-two { bottom: 11%; right: -1.5rem; }
.orbit-node-three { bottom: 16%; left: -1.4rem; }

.signin-trust { display: flex; flex-wrap: wrap; gap: .7rem 1.35rem; color: rgba(247,255,242,.7); font-size: .76rem; }
.signin-trust span, .signin-card-footer span { display: inline-flex; align-items: center; gap: .4rem; }
.signin-icon { flex: 0 0 auto; width: 1.1rem; height: 1.1rem; }

.signin-card {
  align-self: center;
  width: min(calc(100% - 3rem), 34rem);
  min-width: 0;
  margin: 2rem auto;
  padding: clamp(1.5rem, 3vw, 2.5rem);
  border: 1px solid rgba(255,255,255,.76);
  border-radius: 2rem;
  background: rgba(248,251,248,.97);
  box-shadow: 0 35px 100px rgba(0,0,0,.28);
  animation: signin-card-enter .4s var(--cb-ease-enter) both;
}

.signin-mobile-brand { display: none; color: var(--cb-brand-900); }
.signin-card-heading > span { color: var(--cb-brand-600); font: 700 .7rem/1 var(--cb-font-mono); letter-spacing: .16em; }
.signin-card-heading h2 { margin: .65rem 0 .55rem; color: var(--cb-brand-950); font: 700 clamp(2rem, 4vw, 2.7rem)/1 var(--cb-font-display); letter-spacing: -.04em; }
.signin-card-heading p { margin: 0; color: var(--cb-text-secondary); line-height: 1.6; }

.signin-methods { margin: 1.5rem 0; padding: .32rem; display: grid; grid-template-columns: 1fr 1fr; gap: .35rem; border: 1px solid var(--cb-border); border-radius: 1rem; background: var(--cb-surface-muted); }
.signin-methods a { min-height: 2.75rem; padding: .7rem; display: flex; align-items: center; justify-content: center; gap: .45rem; border-radius: .72rem; color: var(--cb-text-secondary); text-decoration: none; font-size: .84rem; font-weight: 700; transition: background var(--cb-motion-fast), color var(--cb-motion-fast), box-shadow var(--cb-motion-fast); }
.signin-methods a[aria-current="page"] { background: var(--cb-surface); color: var(--cb-brand-900); box-shadow: var(--cb-shadow-sm); }

.signin-form { margin-top: 1.4rem; display: grid; gap: .72rem; }
.signin-form label, .signin-role-form legend { color: var(--cb-text); font-size: .8rem; font-weight: 700; }
.signin-label-row { display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
.signin-label-row a, .signin-back { color: var(--cb-brand-600); font-size: .78rem; font-weight: 700; text-decoration: none; }
.signin-field { min-width: 0; min-height: 3.35rem; padding: 0 .95rem; display: flex; align-items: center; gap: .7rem; border: 1px solid var(--cb-border); border-radius: .9rem; background: var(--cb-surface); transition: border-color var(--cb-motion-fast), box-shadow var(--cb-motion-fast); }
.signin-field:focus-within { border-color: var(--cb-focus); box-shadow: 0 0 0 3px rgba(35,107,81,.13); }
.signin-field > svg { color: var(--cb-brand-600); }
.signin-field input { width: 100%; min-width: 0; min-height: 3.1rem; border: 0; outline: 0; background: transparent; color: var(--cb-text); font: 500 1rem/1.2 var(--cb-font-body); }
.signin-field input::placeholder { color: #76877f; }
.signin-code { box-sizing: border-box; width: 100%; min-height: 4.2rem; padding: .8rem; border: 1px solid var(--cb-border); border-radius: .9rem; background: var(--cb-surface); color: var(--cb-brand-950); text-align: center; font: 700 1.65rem/1 var(--cb-font-mono); letter-spacing: .42em; }
.signin-hint { margin: .1rem 0 .35rem; color: var(--cb-text-muted); font-size: .78rem; line-height: 1.55; }
.signin-submit { min-height: 3.35rem; margin-top: .35rem; padding: .8rem 1.1rem; display: flex; align-items: center; justify-content: center; gap: .5rem; border: 0; border-radius: .9rem; background: var(--cb-brand-800); color: var(--cb-on-brand); cursor: pointer; font: 800 .92rem/1 var(--cb-font-body); box-shadow: 0 14px 28px rgba(8,71,52,.2); transition: background var(--cb-motion-fast), transform var(--cb-motion-fast), box-shadow var(--cb-motion-fast); }
.signin-submit:hover { background: var(--cb-brand-700); box-shadow: 0 18px 34px rgba(8,71,52,.25); }
.signin-submit:active { transform: scale(.985); }
.signin-back { min-height: 2.75rem; display: inline-flex; align-items: center; justify-content: center; }

.signin-alert, .signin-notice { margin-top: 1rem; padding: .8rem .9rem; border-radius: .8rem; font-size: .82rem; line-height: 1.5; }
.signin-alert { border: 1px solid #e7b6b1; background: var(--cb-danger-surface); color: var(--cb-danger); }
.signin-notice { border: 1px solid #bdd7c4; background: var(--cb-success-surface); color: var(--cb-success); }

.signin-role-form fieldset { margin: 0; padding: 0; display: grid; gap: .65rem; border: 0; }
.signin-role-form legend { margin-bottom: .25rem; }
.signin-role-choice { position: relative; display: block; cursor: pointer; }
.signin-role-choice input { position: absolute; opacity: 0; pointer-events: none; }
.signin-role-choice > span { min-height: 4.5rem; padding: .8rem .9rem; display: grid; grid-template-columns: 1.6rem 1fr; column-gap: .6rem; align-items: center; border: 1px solid var(--cb-border); border-radius: .9rem; background: var(--cb-surface); transition: border-color var(--cb-motion-fast), background var(--cb-motion-fast), box-shadow var(--cb-motion-fast); }
.signin-role-choice svg { grid-row: 1 / 3; color: var(--cb-brand-600); }
.signin-role-choice strong { color: var(--cb-text); font-size: .88rem; }
.signin-role-choice small { color: var(--cb-text-muted); font-size: .72rem; }
.signin-role-choice input:checked + span { border-color: var(--cb-brand-600); background: var(--cb-selected); box-shadow: 0 0 0 2px rgba(22,118,91,.12); }
.signin-role-choice input:focus-visible + span { outline: 3px solid var(--cb-focus); outline-offset: 3px; }

.signin-card-footer { margin-top: 1.6rem; padding-top: 1rem; display: flex; justify-content: center; flex-wrap: wrap; gap: .7rem 1rem; border-top: 1px solid var(--cb-divider); color: var(--cb-text-muted); font-size: .67rem; }

@keyframes signin-card-enter { from { opacity: 0; transform: translateY(18px); } to { opacity: 1; transform: translateY(0); } }
@keyframes signin-float { from { transform: translateY(-5px); } to { transform: translateY(6px); } }
@keyframes signin-orbit { to { transform: rotate(1turn); } }
@keyframes signin-breathe { from { transform: scale(.9); } to { transform: scale(1.08); } }

@media (max-width: 900px) {
  .signin-layout { grid-template-columns: 1fr; }
  .signin-story { min-height: auto; padding: 1.25rem 1.25rem 0; }
  .signin-brand, .signin-story-copy, .signin-orbit, .signin-trust { display: none; }
  .signin-card { width: min(calc(100% - 1.5rem), 34rem); margin: max(1rem, env(safe-area-inset-top)) auto max(1rem, env(safe-area-inset-bottom)); padding: 1.35rem; border-radius: 1.5rem; }
  .signin-mobile-brand { margin-bottom: 1.75rem; display: flex; }
  .signin-mobile-brand img { width: 2.6rem; height: 2.6rem; }
}

@media (min-width: 901px) and (max-width: 1180px) {
  .signin-orbit { display: none; }
}

@media (max-width: 380px) {
  .signin-card { width: min(calc(100% - 1rem), 34rem); padding: 1.1rem; }
  .signin-methods a { padding-inline: .35rem; font-size: .78rem; }
  .signin-card-heading h2 { font-size: 1.9rem; }
}

@media (prefers-reduced-motion: reduce) {
  .signin-ambient, .signin-orbit > img, .signin-orbit-line, .signin-card { animation: none !important; }
  .signin-submit, .signin-methods a, .signin-field, .signin-role-choice > span { transition-duration: 1ms !important; }
}