/* ==========================================================================
   Auth pages — Login, Register, Password reset
   Uses CSS variables from home.css (:root / body.dark)
   ========================================================================== */

.auth {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: var(--color-bg-secondary);
  transition: background-color var(--transition);
}

.auth__card {
  max-width: 460px;
  width: 100%;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: var(--shadow-xl);
  transition: background-color var(--transition), border-color var(--transition), box-shadow var(--transition);
}

/* --- Header --- */
.auth__logo {
  display: flex;
  justify-content: center;
  margin-bottom: 32px;
}

.auth__logo-img {
  height: 44px;
  width: auto;
  transition: filter var(--transition);
}

.dark .auth__logo-img {
  filter: brightness(0) invert(1);
}

.auth__header {
  text-align: center;
  margin-bottom: 32px;
}

.auth__title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 6px;
}

.auth__subtitle {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
}

/* --- Theme toggle (corner) --- */
.auth__theme-toggle {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 100;
}

/* --- Back link --- */
.auth__back {
  position: fixed;
  top: 20px;
  left: 20px;
  z-index: 100;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  text-decoration: none;
  transition: color var(--transition);
}

.auth__back:hover {
  color: var(--color-primary);
}

/* --- Form fields --- */
.auth__form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.auth__row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.auth__field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.auth__label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-text);
}

.auth__input {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-bg);
  color: var(--color-text);
  font-size: 0.95rem;
  font-family: var(--font-sans);
  line-height: 1.5;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.auth__input::placeholder {
  color: var(--color-text-muted);
}

.auth__input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(var(--color-primary-rgb), 0.15);
}

.auth__hint {
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.auth__input--error {
  border-color: #EF4444;
}

.auth__input--error:focus {
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.15);
}

/* --- Checkbox row --- */
.auth__checkbox {
  display: flex;
  align-items: center;
  gap: 8px;
}

.auth__checkbox input[type="checkbox"] {
  width: 16px;
  height: 16px;
  accent-color: var(--color-primary);
  cursor: pointer;
}

.auth__checkbox label {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  cursor: pointer;
}

/* --- Inline help row (remember me + forgot password) --- */
.auth__options {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
}

.auth__forgot {
  font-size: 0.85rem;
  color: var(--color-primary);
  font-weight: 500;
}

.auth__forgot:hover {
  color: var(--color-primary-hover);
}

/* --- Submit button --- */
.auth__submit {
  width: 100%;
  padding: 12px 24px;
  border: none;
  border-radius: var(--radius-md);
  background: var(--color-primary);
  color: #FFFFFF;
  font-size: 1rem;
  font-weight: 600;
  font-family: var(--font-sans);
  cursor: pointer;
  transition: background-color var(--transition), transform 0.15s ease, box-shadow var(--transition);
}

.auth__submit:hover {
  background: var(--color-primary-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(var(--color-primary-rgb), 0.4);
}

.auth__submit:active {
  transform: translateY(0);
}

/* --- Divider --- */
.auth__divider {
  display: flex;
  align-items: center;
  gap: 16px;
  color: var(--color-text-muted);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.auth__divider::before,
.auth__divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--color-border);
}

/* --- Footer links --- */
.auth__footer {
  margin-top: 24px;
  text-align: center;
  font-size: 0.9rem;
  color: var(--color-text-secondary);
}

.auth__footer a {
  color: var(--color-primary);
  font-weight: 600;
}

.auth__footer a:hover {
  color: var(--color-primary-hover);
}

/* --- Error messages --- */
.auth__errors {
  background: #FEF2F2;
  border: 1px solid #FECACA;
  border-radius: var(--radius-md);
  padding: 14px 18px;
  color: #991B1B;
  font-size: 0.875rem;
  line-height: 1.5;
}

.dark .auth__errors {
  background: rgba(239, 68, 68, 0.1);
  border-color: rgba(239, 68, 68, 0.3);
  color: #FCA5A5;
}

.auth__errors h3 {
  font-size: 0.875rem;
  font-weight: 700;
  margin-bottom: 6px;
}

.auth__errors ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.auth__errors li {
  padding: 2px 0;
}

.auth__errors li::before {
  content: '• ';
  color: #EF4444;
}

/* --- Flash messages --- */
.auth__flash {
  padding: 12px 18px;
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  margin-bottom: 20px;
}

.auth__flash--notice {
  background: #F0FDF4;
  border: 1px solid #BBF7D0;
  color: #166534;
}

.dark .auth__flash--notice {
  background: rgba(34, 197, 94, 0.1);
  border-color: rgba(34, 197, 94, 0.3);
  color: #86EFAC;
}

.auth__flash--alert {
  background: #FEF2F2;
  border: 1px solid #FECACA;
  color: #991B1B;
}

.dark .auth__flash--alert {
  background: rgba(239, 68, 68, 0.1);
  border-color: rgba(239, 68, 68, 0.3);
  color: #FCA5A5;
}

/* --- Responsive --- */
@media (max-width: 480px) {
  .auth__card {
    padding: 28px 20px;
  }

  .auth__row {
    grid-template-columns: 1fr;
  }

  .auth__back,
  .auth__theme-toggle {
    position: static;
    margin-bottom: 12px;
  }

  .auth {
    flex-direction: column;
    padding: 16px;
  }

  .auth__top-bar {
    display: flex;
    justify-content: space-between;
    width: 100%;
    max-width: 460px;
    margin-bottom: 16px;
  }
}