/* ============================================================
   Chemistry Made Easy — Auth UI Styles
   ============================================================
   Styles for:  login modal, navbar auth button, avatar
   Theme-aware: uses the site's existing CSS variables
   ============================================================ */

/* ── Navbar Auth Button ─────────────────────────────────────── */

.cme-auth-nav {
  display: flex;
  align-items: center;
  margin-left: 4px;
}

.cme-auth-nav__btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 7px 14px;
  font-family: inherit;
  font-size: 0.875rem;
  font-weight: 600;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all 0.25s var(--ease-out);
  text-decoration: none;
}

/* Sign-in button (logged out) */
.cme-auth-nav__signin {
  background: rgba(20, 184, 166, 0.1);
  color: var(--color-teal);
  border: 1px solid rgba(20, 184, 166, 0.2);
}

.cme-auth-nav__signin:hover {
  background: rgba(20, 184, 166, 0.18);
  border-color: rgba(20, 184, 166, 0.35);
  transform: translateY(-1px);
}

.cme-auth-nav__signin svg {
  flex-shrink: 0;
}

/* Avatar button (logged in) */
.cme-auth-nav__avatar {
  padding: 0;
  background: none;
  border: none;
}

.cme-auth-nav__avatar::after {
  display: none !important;
}

.cme-auth-nav__avatar-circle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: linear-gradient(135deg, #0d9488, #14b8a6);
  color: #ffffff;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.5px;
  overflow: hidden;
  border: 2px solid rgba(20, 184, 166, 0.3);
  transition: transform 0.25s var(--ease-out), box-shadow 0.25s var(--ease-out);
}

.cme-auth-nav__avatar:hover .cme-auth-nav__avatar-circle {
  transform: scale(1.08);
  box-shadow: 0 0 0 3px rgba(20, 184, 166, 0.15);
}

.cme-auth-nav__avatar-circle img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 50%;
}

/* Mobile adjustments */
@media (max-width: 1024px) {
  .cme-auth-nav {
    width: 100%;
    margin-left: 0;
    margin-top: var(--space-sm);
    padding: var(--space-xs) 0;
  }

  .cme-auth-nav__signin {
    width: 100%;
    justify-content: center;
    padding: var(--space-md);
    font-size: 1rem;
    border-radius: var(--radius-md);
  }

  .cme-auth-nav__avatar {
    width: 100%;
    justify-content: flex-start;
    padding: var(--space-sm) 0;
    gap: 10px;
  }
}


/* ── Login Modal ────────────────────────────────────────────── */

.cme-auth-modal {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-lg);
  /* Hidden by default */
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

.cme-auth-modal.is-visible {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

/* Overlay */
.cme-auth-modal__overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}

.cme-auth-modal.is-visible .cme-auth-modal__overlay {
  animation: cmeAuthFadeIn 0.3s ease;
}

/* Card */
.cme-auth-modal__card {
  position: relative;
  width: 100%;
  max-width: 420px;
  background: var(--color-surface);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-xl);
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.25);
  padding: 2rem 2rem 1.75rem;
  transform: translateY(20px) scale(0.96);
  transition: transform 0.35s var(--ease-out);
  max-height: 90vh;
  overflow-y: auto;
}

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

/* Close button */
.cme-auth-modal__close {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-surface-sunken);
  border: 1px solid var(--color-border);
  border-radius: 50%;
  color: var(--color-text-muted);
  cursor: pointer;
  transition: all 0.2s ease;
}

.cme-auth-modal__close:hover {
  background: var(--color-surface-raised);
  color: var(--color-text);
  transform: rotate(90deg);
}

/* Header */
.cme-auth-modal__header {
  text-align: center;
  margin-bottom: 1.5rem;
}

.cme-auth-modal__logo {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 52px;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, #0d9488, #14b8a6);
  color: #ffffff;
  margin-bottom: 1rem;
  box-shadow: 0 4px 12px rgba(20, 184, 166, 0.3);
}

.cme-auth-modal__title {
  font-size: 1.35rem !important;
  font-weight: 700;
  color: var(--color-navy) !important;
  margin-bottom: 0.35rem;
}

.cme-auth-modal__subtitle {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  max-width: none;
}

/* Error banner */
.cme-auth-modal__error {
  display: none;
  background: rgba(239, 68, 68, 0.08);
  border: 1px solid rgba(239, 68, 68, 0.2);
  color: #dc2626;
  font-size: 0.85rem;
  font-weight: 500;
  padding: 0.65rem 1rem;
  border-radius: var(--radius-md);
  margin-bottom: 1rem;
  text-align: center;
}

.cme-auth-modal__error.is-visible {
  display: block;
}

[data-theme="dark"] .cme-auth-modal__error {
  background: rgba(239, 68, 68, 0.12);
  border-color: rgba(239, 68, 68, 0.3);
  color: #f87171;
}

/* Google button */
.cme-auth-modal__google {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  width: 100%;
  padding: 12px;
  background: var(--color-surface-raised);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-md);
  color: var(--color-navy);
  font-family: inherit;
  font-size: 0.925rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
}

.cme-auth-modal__google:hover:not(:disabled) {
  background: var(--color-surface-sunken);
  border-color: var(--color-teal);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

.cme-auth-modal__google:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Divider */
.cme-auth-modal__divider {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 1.25rem 0;
}

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

.cme-auth-modal__divider span {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--color-text-muted);
  white-space: nowrap;
}

/* Form fields */
.cme-auth-modal__form {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.cme-auth-modal__field label {
  display: block;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.35rem;
}

.cme-auth-modal__field input {
  width: 100%;
  padding: 11px 14px;
  background: var(--color-surface-sunken);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-md);
  color: var(--color-text);
  font-family: inherit;
  font-size: 0.925rem;
  font-weight: 500;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
  outline: none;
}

.cme-auth-modal__field input:focus {
  border-color: var(--color-teal);
  box-shadow: 0 0 0 3px rgba(20, 184, 166, 0.12);
}

.cme-auth-modal__field input::placeholder {
  color: var(--color-text-muted);
  opacity: 0.6;
}

/* Field row (label + forgot) */
.cme-auth-modal__field-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.cme-auth-modal__forgot {
  background: none;
  border: none;
  color: var(--color-teal);
  font-family: inherit;
  font-size: 0.78rem;
  font-weight: 600;
  cursor: pointer;
  padding: 0;
  transition: opacity 0.2s;
}

.cme-auth-modal__forgot:hover {
  opacity: 0.75;
}

/* Submit button */
.cme-auth-modal__submit {
  position: relative;
  width: 100%;
  padding: 13px;
  margin-top: 0.25rem;
  background: linear-gradient(135deg, #0d9488, #14b8a6);
  color: #ffffff;
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 700;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all 0.25s var(--ease-out);
  box-shadow: 0 4px 14px rgba(20, 184, 166, 0.3);
}

.cme-auth-modal__submit:hover:not(:disabled) {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(20, 184, 166, 0.4);
}

.cme-auth-modal__submit:disabled {
  opacity: 0.65;
  cursor: not-allowed;
}

/* Spinner inside submit */
.cme-auth-modal__spinner {
  display: none;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  animation: cmeAuthSpin 0.8s linear infinite;
}

/* Toggle (bottom link) */
.cme-auth-modal__toggle {
  text-align: center;
  margin-top: 1.25rem;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  max-width: none;
}

.cme-auth-modal__toggle button {
  background: none;
  border: none;
  color: var(--color-teal);
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 700;
  cursor: pointer;
  padding: 0;
  transition: opacity 0.2s;
}

.cme-auth-modal__toggle button:hover {
  opacity: 0.75;
}


/* ── Animations ─────────────────────────────────────────────── */

@keyframes cmeAuthFadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

@keyframes cmeAuthSpin {
  to { transform: translate(-50%, -50%) rotate(360deg); }
}


/* ── Dark Mode Overrides ────────────────────────────────────── */

[data-theme="dark"] .cme-auth-modal__overlay {
  background: rgba(0, 0, 0, 0.7);
}

[data-theme="dark"] .cme-auth-modal__card {
  background: #1e293b;
  border-color: rgba(255, 255, 255, 0.08);
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.5);
}

[data-theme="dark"] .cme-auth-modal__title {
  color: #e2e8f0 !important;
}

[data-theme="dark"] .cme-auth-modal__google {
  background: rgba(255, 255, 255, 0.05);
  border-color: rgba(255, 255, 255, 0.1);
  color: #e2e8f0;
}

[data-theme="dark"] .cme-auth-modal__google:hover:not(:disabled) {
  background: rgba(255, 255, 255, 0.08);
}

[data-theme="dark"] .cme-auth-modal__close {
  background: rgba(255, 255, 255, 0.05);
  border-color: rgba(255, 255, 255, 0.08);
  color: #94a3b8;
}

[data-theme="dark"] .cme-auth-modal__close:hover {
  background: rgba(255, 255, 255, 0.1);
  color: #e2e8f0;
}

/* Dark mode navbar auth */
[data-theme="dark"] .cme-auth-nav__signin {
  background: rgba(45, 212, 191, 0.1);
  color: #2dd4bf;
  border-color: rgba(45, 212, 191, 0.2);
}

[data-theme="dark"] .cme-auth-nav__signin:hover {
  background: rgba(45, 212, 191, 0.18);
  border-color: rgba(45, 212, 191, 0.35);
}


/* ── Curriculum Onboarding Overlay ──────────────────────────── */

.cme-onboard {
  position: fixed;
  inset: 0;
  z-index: 10000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-lg);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.4s ease, visibility 0.4s ease;
}

.cme-onboard.is-visible {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.cme-onboard__overlay {
  position: absolute;
  inset: 0;
  background: rgba(2, 6, 23, 0.75);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.cme-onboard__card {
  position: relative;
  width: 100%;
  max-width: 560px;
  background: var(--color-surface);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-xl);
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.35);
  padding: 2.5rem 2.25rem 2rem;
  transform: translateY(24px) scale(0.95);
  transition: transform 0.4s var(--ease-out);
  text-align: center;
}

.cme-onboard.is-visible .cme-onboard__card {
  transform: translateY(0) scale(1);
}

.cme-onboard__badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  border-radius: 16px;
  background: linear-gradient(135deg, #0d9488, #14b8a6);
  color: #ffffff;
  margin-bottom: 1.25rem;
  box-shadow: 0 6px 20px rgba(20, 184, 166, 0.35);
}

.cme-onboard__title {
  font-size: 1.4rem !important;
  font-weight: 700;
  color: var(--color-navy) !important;
  margin-bottom: 0.5rem;
}

.cme-onboard__subtitle {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  max-width: 400px;
  margin: 0 auto 1.75rem;
  line-height: 1.5;
}

/* Choice cards */
.cme-onboard__choices {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

@media (max-width: 480px) {
  .cme-onboard__choices { grid-template-columns: 1fr; }
  .cme-onboard__card { padding: 2rem 1.5rem 1.5rem; }
}

.cme-onboard__choice {
  position: relative;
  padding: 1.5rem 1.25rem;
  border: 2px solid var(--color-border-strong);
  border-radius: var(--radius-lg);
  background: var(--color-surface-sunken);
  cursor: pointer;
  transition: all 0.25s ease;
  text-align: center;
  outline: none;
  font-family: inherit;
}

.cme-onboard__choice:hover {
  border-color: rgba(20, 184, 166, 0.4);
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(20, 184, 166, 0.12);
}

.cme-onboard__choice.is-selected {
  border-color: #14b8a6;
  background: rgba(20, 184, 166, 0.06);
  box-shadow: 0 0 0 3px rgba(20, 184, 166, 0.15);
}

.cme-onboard__choice-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 12px;
  margin: 0 auto 0.75rem;
  font-size: 1.5rem;
}

.cme-onboard__choice--aqa .cme-onboard__choice-icon {
  background: rgba(99, 102, 241, 0.1);
  color: #6366f1;
}

.cme-onboard__choice--ib .cme-onboard__choice-icon {
  background: rgba(245, 158, 11, 0.1);
  color: #f59e0b;
}

.cme-onboard__choice-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-navy);
  margin-bottom: 0.25rem;
}

.cme-onboard__choice-desc {
  font-size: 0.78rem;
  color: var(--color-text-muted);
  line-height: 1.4;
}

/* Check indicator */
.cme-onboard__choice::after {
  content: '';
  position: absolute;
  top: 10px;
  right: 10px;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  border: 2px solid var(--color-border-strong);
  transition: all 0.2s ease;
}

.cme-onboard__choice.is-selected::after {
  background: linear-gradient(135deg, #0d9488, #14b8a6);
  border-color: #14b8a6;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='20 6 9 17 4 12'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: center;
  background-size: 12px;
}

/* Continue button */
.cme-onboard__continue {
  width: 100%;
  padding: 14px;
  background: linear-gradient(135deg, #0d9488, #14b8a6);
  color: #ffffff;
  font-family: inherit;
  font-size: 1rem;
  font-weight: 700;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all 0.25s var(--ease-out);
  box-shadow: 0 4px 14px rgba(20, 184, 166, 0.3);
}

.cme-onboard__continue:hover:not(:disabled) {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(20, 184, 166, 0.4);
}

.cme-onboard__continue:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

.cme-onboard__skip {
  display: block;
  margin: 0.75rem auto 0;
  background: none;
  border: none;
  color: var(--color-text-muted);
  font-family: inherit;
  font-size: 0.8rem;
  font-weight: 500;
  cursor: pointer;
  padding: 4px 8px;
  transition: color 0.2s;
}

.cme-onboard__skip:hover {
  color: var(--color-text);
}

/* Dark mode onboarding */
[data-theme="dark"] .cme-onboard__card {
  background: #1e293b;
  border-color: rgba(255, 255, 255, 0.08);
}

[data-theme="dark"] .cme-onboard__title {
  color: #e2e8f0 !important;
}

[data-theme="dark"] .cme-onboard__choice {
  background: rgba(255, 255, 255, 0.03);
  border-color: rgba(255, 255, 255, 0.08);
}

[data-theme="dark"] .cme-onboard__choice:hover {
  border-color: rgba(45, 212, 191, 0.35);
  background: rgba(45, 212, 191, 0.04);
}

[data-theme="dark"] .cme-onboard__choice.is-selected {
  border-color: #2dd4bf;
  background: rgba(45, 212, 191, 0.08);
}

[data-theme="dark"] .cme-onboard__choice-title {
  color: #e2e8f0;
}

[data-theme="dark"] .cme-onboard__choice::after {
  border-color: rgba(255, 255, 255, 0.12);
}