.login-shell {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
}

.login-theme-control {
  position: absolute;
  top: 1rem;
  right: 1rem;
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.login-card {
  width: 100%;
  max-width: 22rem;
  text-align: center;
}

.brand-mark {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  margin-bottom: 2rem;
}

.brand-mark .brand-logo {
  height: 1.75rem;
}

.brand-mark .claw-mark {
  height: 1.5rem;
  color: var(--accent);
}

.login-error {
  min-height: 1.5rem;
  color: var(--accent);
  font-size: 0.9rem;
}

.login-form {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
}

.pin-input {
  font-family: "JetBrains Mono", monospace;
  font-size: 2rem;
  letter-spacing: 1rem;
  width: 15ch;
  padding-inline-start: 0.5ch;
  border: none;
  border-bottom: 2px solid var(--border);
  background-color: transparent;
  background-image: repeating-linear-gradient(
    90deg,
    var(--border) 0 2px,
    transparent 2px calc(100% / 8)
  );
  background-size: calc(100% - 0.5ch) 2px;
  background-position: 0.5ch bottom;
  background-repeat: no-repeat;
  color: var(--accent);
  text-align: left;
}

.login-submit {
  font-family: "Space Grotesk", system-ui, sans-serif;
  background-color: var(--accent);
  color: var(--ink);
  border: none;
  border-radius: var(--radius);
  padding: 0.6rem 2rem;
  font-weight: 700;
  cursor: pointer;
  min-height: 44px;
}

@media (prefers-reduced-motion: no-preference) {
  .pin-input.shake {
    animation: shake 0.3s;
  }
}

@keyframes shake {
  10%, 90% { transform: translateX(-2px); }
  20%, 80% { transform: translateX(4px); }
  30%, 50%, 70% { transform: translateX(-6px); }
  40%, 60% { transform: translateX(6px); }
}