.auth-main {
  min-height: calc(100vh - var(--nav-height));
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-lg) 24px;
}

.auth-card {
  width: 100%;
  max-width: 420px;
  text-align: center;
  padding: var(--space-xl) var(--space-lg);
}

.auth-card__mark {
  font-size: 2rem;
  margin-bottom: var(--space-md);
  color: var(--colour-green);
}

.auth-card__title {
  margin: 0 0 10px;
  font-size: 1.9rem;
}

.auth-card__lead {
  margin: 0 0 var(--space-lg);
  font-size: .95rem;
}

.auth-form {
  display: flex;
  flex-direction: column;
  gap: 10px;
  text-align: left;
}

.auth-label {
  font-size: .85rem;
  font-weight: 700;
  color: var(--colour-ink);
}

.auth-input {
  width: 100%;
  padding: 12px 16px;
  border: 1.5px solid rgba(49,95,67,.2);
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: 1rem;
  background: var(--colour-paper);
  color: var(--colour-ink);
  outline: none;
  transition: border-color .15s;
}

.auth-input:focus {
  border-color: var(--colour-green);
}

.auth-submit {
  width: 100%;
  margin-top: 6px;
  justify-content: center;
}

.auth-error {
  margin: 0;
  font-size: .85rem;
  color: #c0392b;
  text-align: center;
}

.auth-links {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 4px 8px;
  margin-top: var(--space-md);
}

.auth-sep {
  color: var(--colour-muted);
  font-size: .85rem;
}

.auth-text-btn {
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
  font-family: var(--font-body);
  font-size: .85rem;
  color: var(--colour-green);
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: opacity .15s;
}

.auth-text-btn:hover {
  opacity: .7;
}

.profile-username-wrap {
  display: flex;
  align-items: center;
  border: 1.5px solid rgba(49,95,67,.2);
  border-radius: var(--radius-sm);
  background: var(--colour-paper);
  overflow: hidden;
  transition: border-color .15s;
}

.profile-username-wrap:focus-within {
  border-color: var(--colour-green);
}

.profile-username-at {
  padding: 0 4px 0 14px;
  font-weight: 700;
  color: var(--colour-muted);
  font-size: 1rem;
}

.profile-username-input {
  border: none;
  border-radius: 0;
  background: transparent;
  padding-left: 2px;
  flex: 1;
}

.profile-username-input:focus { outline: none; }

.profile-hint {
  margin: 0;
  font-size: .78rem;
  color: var(--colour-muted);
}

.profile-optional {
  font-weight: 400;
  color: var(--colour-muted);
  font-size: .85em;
}