:root {
  --preauth-blue: #24479d;
  --preauth-blue-bright: #2563eb;
  --preauth-blue-dark: #17347d;
  --preauth-surface: #f8fafc;
  --preauth-border: #dbe3ee;
  --preauth-text: #172033;
  --preauth-muted: #64748b;
}

body:not(.portal-shell-active) {
  background: #e8eef7;
}

body:not(.portal-shell-active) .site-header {
  display: none;
}

body:not(.portal-shell-active) .page-shell {
  width: 100%;
  margin: 0;
  padding: clamp(22px, 4vw, 46px) 18px;
}

.preauth-shell {
  display: grid;
  grid-template-columns: minmax(340px, 0.82fr) minmax(480px, 1.18fr);
  width: min(1180px, 100%);
  min-height: 720px;
  margin: 0 auto;
  overflow: hidden;
  border-radius: 34px;
  background: #fff;
  box-shadow: 0 28px 70px rgba(30, 58, 138, 0.15);
}

.preauth-brand-panel {
  position: relative;
  display: flex;
  flex-direction: column;
  min-width: 0;
  padding: 42px 40px 34px;
  overflow: hidden;
  background: linear-gradient(145deg, #274ba4 0%, #214294 58%, #1b397f 100%);
  color: #fff;
}

.preauth-brand-panel::after {
  content: "";
  position: absolute;
  right: -120px;
  bottom: -140px;
  width: 360px;
  height: 360px;
  border-radius: 50%;
  background: rgba(37, 99, 235, 0.22);
  pointer-events: none;
}

.preauth-brand-lockup {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  gap: 13px;
}

.preauth-brand-mark {
  display: grid;
  place-items: center;
  width: 50px;
  height: 50px;
  flex: 0 0 auto;
  border-radius: 12px;
  background: #fff;
  color: var(--preauth-blue-bright);
  font-size: 1.45rem;
  box-shadow: 0 7px 20px rgba(15, 23, 42, 0.14);
}

.preauth-brand-copy {
  display: grid;
  gap: 1px;
}

.preauth-brand-name {
  margin: 0;
  color: #fff;
  font-size: 1.45rem;
  font-weight: 900;
  letter-spacing: 0.02em;
}

.preauth-brand-subtitle {
  margin: 0;
  color: #fde047;
  font-size: 0.76rem;
  font-weight: 900;
}

.preauth-pitch {
  position: relative;
  z-index: 1;
  margin-top: 58px;
}

.preauth-kicker {
  margin: 0 0 14px;
  color: #bfdbfe;
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.08em;
}

.preauth-brand-panel h1 {
  max-width: 390px;
  margin: 0;
  color: #fff;
  font-size: clamp(2.25rem, 4vw, 3.35rem);
  line-height: 1.04;
  letter-spacing: -0.035em;
}

.preauth-brand-panel .hero-copy {
  max-width: 390px;
  margin: 28px 0 0;
  color: #e7efff;
  font-size: 1rem;
  font-weight: 650;
  line-height: 1.8;
}

.preauth-brand-panel .status {
  align-self: flex-start;
  margin-top: 24px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: rgba(255, 255, 255, 0.11);
  color: #e8efff;
}

.preauth-brand-panel .status-ok {
  border-color: rgba(134, 239, 172, 0.25);
  background: rgba(22, 163, 74, 0.2);
  color: #dcfce7;
}

.preauth-brand-panel .status-error {
  border-color: rgba(254, 202, 202, 0.25);
  background: rgba(220, 38, 38, 0.2);
  color: #fee2e2;
}

.preauth-flow {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  gap: 14px;
  margin-top: auto;
  padding-top: 34px;
  color: #4f7df0;
  font-size: 1.35rem;
  font-weight: 900;
}

.preauth-flow-step {
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border: 2px solid currentColor;
  border-radius: 9px;
}

.preauth-flow-arrow {
  opacity: 0.8;
}

.preauth-auth-panel {
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-width: 0;
  padding: 54px clamp(38px, 6vw, 84px);
  background: var(--preauth-surface);
}

.preauth-card {
  display: grid;
  gap: 26px;
  width: 100%;
  max-width: 520px;
  margin: 0 auto;
}

.preauth-card-header {
  display: grid;
  gap: 8px;
}

.preauth-card .eyebrow {
  margin: 0;
  color: var(--preauth-blue-bright);
  font-size: 0.76rem;
  letter-spacing: 0.06em;
}

.preauth-card h2 {
  margin: 0;
  color: var(--preauth-blue-dark);
  font-size: clamp(1.65rem, 3vw, 2rem);
  line-height: 1.25;
}

.preauth-card .muted {
  color: var(--preauth-muted);
  font-size: 0.9rem;
  font-weight: 650;
  line-height: 1.65;
}

.preauth-card .form-stack {
  gap: 20px;
}

.preauth-card label {
  gap: 9px;
  color: #334155;
  font-size: 0.92rem;
  font-weight: 850;
}

.preauth-card input {
  min-height: 58px;
  padding: 13px 16px;
  border: 2px solid #e2e8f0;
  border-radius: 13px;
  background: #fff;
  color: var(--preauth-text);
  font-size: 1rem;
  font-weight: 700;
  box-shadow: 0 1px 2px rgba(15, 23, 42, 0.02);
}

.preauth-card input::placeholder {
  color: #c0c8d4;
}

.preauth-card input:focus {
  border-color: #93b4ff;
  outline: 4px solid rgba(37, 99, 235, 0.1);
}

.preauth-card .button[type="submit"] {
  min-height: 60px;
  margin-top: 4px;
  border-radius: 12px;
  background: var(--preauth-blue-bright);
  box-shadow: 0 6px 0 #1746ad;
  font-size: 1.05rem;
  font-weight: 900;
}

.preauth-card .button[type="submit"]:hover {
  background: #1f5ce0;
}

.preauth-card .button[type="submit"]:active {
  transform: translateY(2px);
  box-shadow: 0 4px 0 #1746ad;
}

.preauth-card .form-error {
  padding: 12px 14px;
  border: 1px solid #fecaca;
  border-radius: 10px;
  background: #fef2f2;
  color: #b91c1c;
  font-size: 0.88rem;
}

.preauth-context {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  width: 100%;
  max-width: 520px;
  margin: 0 auto 26px;
  padding: 13px 15px;
  border: 1px solid #d9e3f2;
  border-radius: 13px;
  background: #fff;
  box-shadow: 0 4px 14px rgba(30, 58, 138, 0.04);
}

.preauth-context .classroom-context-label {
  color: #7a8799;
  font-size: 0.7rem;
}

.preauth-context .classroom-context-name {
  color: var(--preauth-blue-dark);
  font-size: 0.9rem;
}

.preauth-context .button {
  flex: 0 0 auto;
  border-color: #cbd7e7;
  background: #fff;
  color: #34415b;
}

.preauth-note {
  margin: 2px 0 0;
  padding-top: 20px;
  border-top: 1px solid #e2e8f0;
  color: #7a8799;
  font-size: 0.79rem;
  line-height: 1.65;
  text-align: center;
}

@media (max-width: 900px) {
  body:not(.portal-shell-active) .page-shell {
    padding: 0;
  }

  .preauth-shell {
    grid-template-columns: 1fr;
    min-height: 100vh;
    border-radius: 0;
    box-shadow: none;
  }

  .preauth-brand-panel {
    min-height: auto;
    padding: 28px 24px 32px;
  }

  .preauth-pitch {
    margin-top: 34px;
  }

  .preauth-brand-panel h1 {
    max-width: 560px;
    font-size: clamp(2rem, 9vw, 3rem);
  }

  .preauth-brand-panel .hero-copy {
    max-width: 620px;
    margin-top: 18px;
  }

  .preauth-flow {
    display: none;
  }

  .preauth-auth-panel {
    justify-content: flex-start;
    padding: 38px 24px 56px;
  }
}

@media (max-width: 520px) {
  .preauth-brand-panel {
    padding: 22px 18px 28px;
  }

  .preauth-brand-mark {
    width: 44px;
    height: 44px;
  }

  .preauth-brand-name {
    font-size: 1.25rem;
  }

  .preauth-brand-panel .hero-copy {
    font-size: 0.92rem;
  }

  .preauth-auth-panel {
    padding: 32px 18px 48px;
  }

  .preauth-card {
    gap: 22px;
  }

  .preauth-card input {
    min-height: 54px;
  }

  .preauth-context {
    align-items: stretch;
    flex-direction: column;
  }

  .preauth-context .button {
    width: 100%;
  }
}