/* ---- Login page ------------------------------------------------------------
 * Builds on the tokens in styles.css (--bg, --text, --muted, --blue, --green).
 */

.auth {
  --auth-surface: #0f1722;
  --auth-border: rgba(0, 168, 255, 0.2);
  --auth-error: #ff6b6b;
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem 1rem;
  background:
    radial-gradient(40rem 30rem at 15% 10%, rgba(0, 168, 255, 0.12), transparent 70%),
    radial-gradient(40rem 30rem at 85% 90%, rgba(0, 230, 118, 0.10), transparent 70%);
}

.auth__card {
  position: relative;
  width: 100%;
  max-width: 24rem;
  padding: 2rem;
  background: var(--auth-surface);
  border: 1px solid var(--auth-border);
  border-radius: 1rem;
  box-shadow: 0 1.5rem 3rem rgba(0, 0, 0, 0.45);
}

.auth__card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 3px;
  border-radius: 1rem 1rem 0 0;
  background: linear-gradient(90deg, var(--blue), var(--green));
}

.auth__brand {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text);
  text-decoration: none;
}

.auth__title {
  margin: 1.5rem 0 0.25rem;
  font-size: 1.75rem;
  letter-spacing: -0.01em;
}

.auth__lead {
  margin: 0 0 1.5rem;
}

.auth__form {
  display: grid;
  gap: 1rem;
}

.auth__field {
  display: grid;
  gap: 0.375rem;
}

.auth__field label {
  font-size: 0.875rem;
  font-weight: 600;
}

.auth__field input {
  width: 100%;
  padding: 0.75rem 0.875rem;
  font: inherit;
  color: var(--text);
  background: var(--bg);
  border: 1px solid rgba(139, 152, 165, 0.35);
  border-radius: 0.5rem;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.auth__field input:focus {
  outline: none;
  border-color: var(--blue);
  box-shadow: 0 0 0 3px rgba(0, 168, 255, 0.3);
}

.auth__submit {
  margin-top: 0.5rem;
  padding: 0.8rem 1rem;
  font: inherit;
  font-weight: 700;
  color: #04121c;
  background: linear-gradient(90deg, var(--blue), var(--green));
  border: 0;
  border-radius: 0.5rem;
  cursor: pointer;
  transition: filter 0.15s, transform 0.15s;
}

.auth__submit:hover {
  filter: brightness(1.1);
}

.auth__submit:focus-visible {
  outline: 2px solid var(--text);
  outline-offset: 3px;
}

.auth__submit:disabled {
  cursor: progress;
  opacity: 0.7;
}

.auth__error {
  margin: 0 0 1rem;
  padding: 0.75rem 0.875rem;
  color: var(--auth-error);
  background: rgba(255, 107, 107, 0.08);
  border: 1px solid rgba(255, 107, 107, 0.35);
  border-radius: 0.5rem;
  font-size: 0.9375rem;
}

.auth__error[hidden] {
  display: none;
}

.auth__back {
  display: inline-block;
  margin-top: 1.25rem;
  color: var(--muted);
  font-size: 0.875rem;
  text-decoration: none;
}

.auth__back:hover,
.auth__back:focus-visible {
  color: var(--blue);
}

@media (prefers-reduced-motion: reduce) {
  .auth__field input,
  .auth__submit {
    transition: none;
  }
}