.auth-shell {
  min-height: 100vh;
  display: grid;
  grid-template-rows: auto 1fr auto;
}

.auth-header {
  min-height: 88px;
  padding: 16px clamp(20px, 5vw, 72px);
  display: flex;
  align-items: center;
  border-bottom: 1px solid var(--spo-border);
  background: #091018;
}

.auth-brand {
  display: flex;
  align-items: center;
  gap: 18px;
  min-width: 0;
}

.auth-logo {
  width: 168px;
  height: 58px;
  object-fit: contain;
  object-position: left center;
}

.auth-product {
  padding-left: 18px;
  border-left: 1px solid var(--spo-border-strong);
}

.auth-product strong,
.auth-product span { display: block; }
.auth-product strong { font-size: 17px; }
.auth-product span { margin-top: 3px; color: var(--spo-muted); font-size: 12px; }

.auth-main {
  display: grid;
  place-items: center;
  padding: 42px 20px;
}

.auth-panel {
  width: min(100%, 440px);
  border: 1px solid var(--spo-border-strong);
  border-radius: 8px;
  background: var(--spo-surface);
  box-shadow: 0 22px 70px rgba(0, 0, 0, .28);
}

.auth-panel-header {
  padding: 28px 30px 22px;
  border-bottom: 1px solid var(--spo-border);
}
.auth-kicker { color: var(--spo-primary); font-size: 12px; font-weight: 750; }
.auth-panel h1 { margin: 8px 0 0; font-size: 25px; line-height: 1.35; }
.auth-panel-header p { margin: 8px 0 0; color: var(--spo-muted); font-size: 13px; }

.auth-form { padding: 26px 30px 30px; }
.auth-field { display: grid; gap: 8px; margin-bottom: 18px; }
.auth-field label { color: #d8e1e7; font-size: 13px; font-weight: 650; }
.auth-field input {
  width: 100%;
  min-height: 48px;
  padding: 0 13px;
  border: 1px solid var(--spo-border);
  border-radius: 6px;
  background: #081019;
  color: var(--spo-text);
}
.auth-field input::placeholder { color: #687985; }
.auth-field input:focus { border-color: var(--spo-primary); }

.auth-submit {
  width: 100%;
  min-height: 48px;
  border: 0;
  border-radius: 6px;
  background: var(--spo-primary);
  color: #061114;
  font-weight: 800;
  cursor: pointer;
}
.auth-submit:hover { background: #75d5d3; }
.auth-submit:disabled { cursor: wait; opacity: .62; }

.auth-error {
  margin: 0 0 18px;
  padding: 11px 12px;
  border-left: 3px solid var(--spo-danger);
  background: #251319;
  color: #ffd6da;
  font-size: 13px;
  line-height: 1.55;
}
.auth-note { margin: 16px 0 0; color: var(--spo-muted); font-size: 12px; line-height: 1.6; }
.auth-footer { padding: 0 20px 24px; color: #6f818d; text-align: center; font-size: 11px; }

@media (max-width: 640px) {
  .auth-header { min-height: 76px; padding: 12px 18px; }
  .auth-brand { gap: 12px; }
  .auth-logo { width: 112px; height: 44px; }
  .auth-product { padding-left: 12px; }
  .auth-product strong { font-size: 14px; }
  .auth-product span { display: none; }
  .auth-main { align-items: start; padding: 28px 16px; }
  .auth-panel-header, .auth-form { padding-left: 22px; padding-right: 22px; }
  .auth-panel h1 { font-size: 21px; }
}