.auth-modal {
  position: fixed;
  inset: 0;
  z-index: 900;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  background: rgba(11, 11, 12, 0.72);
  backdrop-filter: blur(6px);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--dur-med) var(--ease-luxury), visibility var(--dur-med);
}

.auth-modal.is-open {
  opacity: 1;
  visibility: visible;
}

.auth-modal__card {
  position: relative;
  background: var(--color-white);
  border-radius: var(--radius-lg);
  max-width: 440px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-deep);
  border: 1px solid var(--color-gold-soft);
  transform: scale(0.92) translateY(10px);
  transition: transform var(--dur-med) var(--ease-luxury);
}

.auth-modal.is-open .auth-modal__card {
  transform: scale(1) translateY(0);
}

.auth-modal__card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 24px;
  right: 24px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-gold-light), transparent);
}

.auth-modal__close {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--color-ivory);
  color: var(--color-text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  z-index: 2;
  transition: all var(--dur-fast);
}

.auth-modal__close:hover {
  background: var(--color-gold-soft);
  color: var(--color-black);
}

.auth-modal__body {
  padding: 40px 32px 32px;
}

.auth-modal__brand {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-bottom: 22px;
}

.auth-modal__brand img {
  width: 32px;
  height: 32px;
  object-fit: contain;
}

.auth-modal__brand span {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--color-black);
  letter-spacing: 0.02em;
}

.auth-modal__title {
  font-family: var(--font-display);
  font-size: 1.5rem;
  text-align: center;
  margin-bottom: 6px;
}

.auth-modal__subtitle {
  text-align: center;
  font-size: 0.86rem;
  color: var(--color-text-muted);
  margin-bottom: 26px;
}

/* ---- Tabs (เข้าสู่ระบบ / สมัครสมาชิก) ---- */
.auth-modal__tabs {
  display: flex;
  background: var(--color-ivory);
  border-radius: var(--radius-pill);
  padding: 4px;
  margin-bottom: 26px;
}

.auth-modal__tab {
  flex: 1;
  padding: 10px 0;
  border-radius: var(--radius-pill);
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--color-text-muted);
  transition: all var(--dur-fast) var(--ease-luxury);
}

.auth-modal__tab.is-active {
  background: var(--grad-gold);
  color: var(--color-black);
  box-shadow: var(--shadow-gold);
}

/* ---- Form fields ---- */
.auth-modal__panel {
  display: none;
}

.auth-modal__panel.is-active {
  display: block;
}

.auth-field {
  margin-bottom: 16px;
}

.auth-field label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-black);
  margin-bottom: 7px;
}

.auth-field input {
  width: 100%;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  font-family: var(--font-body);
  font-size: 0.9rem;
  color: var(--color-text-dark);
  background: var(--color-ivory);
  transition: border-color var(--dur-fast), background var(--dur-fast);
}

.auth-field input:focus {
  outline: none;
  border-color: var(--color-gold);
  background: var(--color-white);
}

.auth-field__error {
  display: none;
  font-size: 0.76rem;
  color: #c9392f;
  margin-top: 6px;
}

/* Generic API error banner (login/register failures from the Backend
   — wrong password, duplicate email, network issues, etc). */
.auth-modal__api-error {
  display: none;
  font-size: 0.82rem;
  color: #c9392f;
  background: rgba(201, 57, 47, 0.08);
  border: 1px solid rgba(201, 57, 47, 0.25);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  margin-bottom: 18px;
}

.auth-modal__api-error.is-active {
  display: block;
}

/* Button loading state — dim + disable pointer feedback while an
   async register/login request is in flight (applied to every
   button in the form so the user can't double-submit or switch
   tabs mid-request). */
.auth-modal button.is-loading {
  opacity: 0.55;
  pointer-events: none;
}

.auth-field.has-error input {
  border-color: #c9392f;
}

.auth-field.has-error .auth-field__error {
  display: block;
}

/* Date input — same visual language as other auth fields */
.auth-field input[type="date"] {
  color: var(--color-text-dark);
}

/* ---- Lifestyle preference chips (interests, multi-select) ---- */
.auth-field--chips {
  margin-bottom: 18px;
}

.auth-chip-group {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.auth-chip-group button {
  padding: 8px 14px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--color-border);
  background: var(--color-ivory);
  font-size: 0.8rem;
  color: var(--color-text-dark);
  transition: all var(--dur-fast) var(--ease-luxury);
}

.auth-chip-group button:hover {
  border-color: var(--color-gold);
}

.auth-chip-group button.is-active {
  background: var(--grad-gold);
  border-color: transparent;
  color: var(--color-black);
  font-weight: 600;
  box-shadow: var(--shadow-gold);
}

/* ---- Lifestyle preference toggles (single-select: env / pace) ---- */
.auth-toggle-group {
  display: flex;
  background: var(--color-ivory);
  border-radius: var(--radius-pill);
  padding: 4px;
  gap: 4px;
}

.auth-toggle-group button {
  flex: 1;
  padding: 9px 10px;
  border-radius: var(--radius-pill);
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--color-text-muted);
  transition: all var(--dur-fast) var(--ease-luxury);
  white-space: nowrap;
}

.auth-toggle-group button.is-active {
  background: var(--grad-gold);
  color: var(--color-black);
  box-shadow: var(--shadow-gold);
}

.auth-modal__row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8rem;
  margin-bottom: 20px;
}

.auth-modal__checkbox {
  display: flex;
  align-items: center;
  gap: 7px;
  color: var(--color-text-muted);
  cursor: pointer;
}

.auth-modal__checkbox input {
  accent-color: var(--color-gold);
  width: 15px;
  height: 15px;
}

.auth-modal__forgot {
  color: var(--color-gold-dark);
  font-weight: 500;
}

.auth-modal__forgot:hover {
  text-decoration: underline;
}

.auth-modal__submit {
  width: 100%;
  margin-bottom: 18px;
}

/* ---- Divider ---- */
.auth-modal__divider {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 18px 0;
  font-size: 0.76rem;
  color: var(--color-text-muted);
}

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

/* ---- Google button ---- */
.auth-google-btn {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 12px 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  background: var(--color-white);
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--color-text-dark);
  transition: all var(--dur-fast) var(--ease-luxury);
}

.auth-google-btn:hover {
  border-color: var(--color-gold);
  background: var(--color-ivory);
}

.auth-google-btn svg {
  flex-shrink: 0;
}

.auth-modal__switch {
  text-align: center;
  font-size: 0.84rem;
  color: var(--color-text-muted);
  margin-top: 22px;
}

.auth-modal__switch button {
  color: var(--color-gold-dark);
  font-weight: 600;
}

.auth-modal__switch button:hover {
  text-decoration: underline;
}

.auth-modal__terms {
  font-size: 0.74rem;
  color: var(--color-text-muted);
  text-align: center;
  margin-top: 16px;
  line-height: 1.6;
}

.auth-modal__terms a {
  color: var(--color-gold-dark);
}

/* ---- Success state (shown briefly after mock sign-in) ---- */
.auth-modal__success {
  display: none;
  text-align: center;
  padding: 20px 0 6px;
}

.auth-modal__success.is-active {
  display: block;
}

.auth-modal__success-icon {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: var(--grad-gold);
  color: var(--color-black);
  font-size: 1.6rem;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 18px;
  box-shadow: var(--shadow-gold);
}

@media (max-width: 480px) {
  .auth-modal__body {
    padding: 32px 22px 26px;
  }
}