/**
 * Private registration presentation.
 *
 * The form remains part of auth.html and keeps the existing invitation,
 * validation and submission contracts. This layer only gives the longer
 * private-registration path its own responsive hierarchy.
 */

body.auth-registration-active .auth-shell {
  max-width: 1280px;
}

body.auth-registration-active .brand-panel {
  flex: 0 0 35%;
  max-width: 420px;
}

body.auth-registration-active .auth-panel {
  justify-content: flex-start;
  padding: var(--space-18) var(--space-20);
}

#registerForm.active {
  display: grid;
  gap: var(--space-9);
}

#registerForm .form-section {
  margin: 0;
  padding: var(--space-10);
  border-color: var(--color-border-light);
  background: var(--color-bg-card);
  box-shadow: 0 10px 26px rgba(8, 18, 47, 0.05);
  transition: border-color 160ms ease;
}

#registerForm .form-section:hover {
  border-color: var(--color-border-light);
  box-shadow: 0 10px 26px rgba(8, 18, 47, 0.05);
}

#registerForm .form-section:nth-child(1) {
  background: rgba(79, 70, 229, 0.035);
  border-color: rgba(79, 70, 229, 0.2);
}

#registerForm .form-section:nth-child(2) {
  background: rgba(122, 52, 80, 0.035);
  border-color: rgba(122, 52, 80, 0.18);
}

#registerForm .form-section:nth-child(3) {
  background: rgba(47, 143, 104, 0.035);
  border-color: rgba(47, 143, 104, 0.2);
}

#registerForm .form-section-title {
  min-height: 38px;
  margin-bottom: var(--space-9);
  padding-bottom: var(--space-6);
  border-bottom-color: var(--color-border-light);
  font-size: 1rem;
  line-height: 1.35;
}

#registerForm .form-section-title .form-section-icon {
  width: 32px;
  height: 32px;
  flex: 0 0 32px;
  padding: 7px;
  border-radius: var(--radius-md);
  background: var(--color-bg-selected);
  color: var(--color-brand-violet);
}

#registerForm .form-section:nth-child(2) .form-section-icon {
  background: rgba(122, 52, 80, 0.1);
  color: #7a3450;
}

#registerForm .form-section:nth-child(3) .form-section-icon {
  background: var(--color-success-bg);
  color: #2f8f68;
}

#registerForm .registration-interface-language-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0;
}

#registerForm .registration-interface-language-globe {
  width: 25px;
  height: 25px;
  flex: 0 0 25px;
}

#registerForm .form-group {
  margin-bottom: var(--space-8);
}

#registerForm .form-group:last-child {
  margin-bottom: 0;
}

#registerForm .form-group label {
  margin-bottom: var(--space-3);
  line-height: 1.4;
}

#registerForm .form-group input,
#registerForm .form-group select {
  min-height: 48px;
  border-color: var(--color-border-light);
  background-color: rgba(255, 255, 255, 0.94);
}

#registerForm .form-group input:hover:not(:focus),
#registerForm .form-group select:hover:not(:focus) {
  border-color: var(--color-border-medium);
}

#registerForm #registerEmail[readonly] {
  border-color: var(--color-border-medium);
  background: var(--color-bg-selected);
  color: var(--color-text-primary);
  opacity: 1;
}

#registerForm #registrationInvitationNotice {
  margin-top: var(--space-4);
  padding: var(--space-5) var(--space-6);
  border-left: 3px solid var(--color-brand-violet);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  background: var(--color-bg-selected);
  color: var(--color-text-secondary);
}

#registerForm .password-strength-container {
  margin-top: var(--space-5);
  padding: var(--space-6);
  border-color: var(--color-border-light);
  background: rgba(255, 255, 255, 0.76);
}

#registerForm .birth-date-selectors select {
  min-width: 0;
  padding-right: 36px;
  background-color: rgba(255, 255, 255, 0.94);
  background-image: none;
}

#registerForm .birth-date-selectors select:invalid {
  color: var(--color-text-secondary);
}

#registerForm .registration-select-control {
  position: relative;
  min-width: 0;
}

#registerForm .registration-select-control::after {
  position: absolute;
  top: 50%;
  right: 16px;
  width: 9px;
  height: 9px;
  border-right: 2px solid #24304f;
  border-bottom: 2px solid #24304f;
  content: '';
  pointer-events: none;
  transform: translateY(-70%) rotate(45deg);
}

#registerForm .birth-date-selectors .registration-select-control::after {
  right: 12px;
  width: 8px;
  height: 8px;
}

#registerForm #nativeLanguageLabel,
#registerForm .registration-language-add-label {
  display: block;
  margin: 0 0 var(--space-3);
  color: var(--color-text-primary);
  font-size: 0.9rem;
  font-weight: 700;
  line-height: 1.4;
}

#registerForm [data-registration-language-picker='native'],
#registerForm .language-selector-wrapper {
  width: 100%;
  max-width: 300px;
  margin-right: auto;
  margin-left: auto;
}

#registerForm .language-selector {
  min-height: 48px;
  padding-right: 46px;
  border-color: var(--color-border-light);
  border-style: solid;
  background-color: rgba(255, 255, 255, 0.9);
  background-image: none;
  color: var(--color-text-secondary);
  appearance: none;
  -webkit-appearance: none;
}

#registerForm .registration-language-picker {
  position: relative;
  min-width: 0;
}

#registerForm .registration-language-picker::after {
  top: 24px;
}

#registerForm .registration-language-native-control {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  padding: 0;
  border: 0;
  margin: -1px;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
}

#registerForm .registration-language-picker-trigger {
  display: flex;
  min-width: 0;
  min-height: 48px;
  align-items: center;
  gap: var(--space-4);
  padding-right: 46px;
  text-align: left;
}

#registerForm .registration-language-picker-label {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

#registerForm .registration-language-picker-flag,
#registerForm .registration-language-option-flag {
  width: 34px;
  height: 24px;
  flex: 0 0 34px;
  border: 1px solid rgba(36, 48, 79, 0.13);
  border-radius: 999px;
  background-size: cover;
  box-shadow: 0 3px 8px rgba(36, 48, 79, 0.1);
}

#registerForm .registration-language-picker-globe {
  width: 25px;
  height: 25px;
  flex: 0 0 25px;
}

#registerForm .registration-language-picker-menu {
  position: relative;
  top: auto;
  right: 0;
  left: 0;
  z-index: 30;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-2);
  max-height: 270px;
  max-height: min(270px, 46vh);
  overflow-y: auto;
  margin-top: 7px;
  padding: var(--space-3);
  border: 1px solid rgba(36, 48, 79, 0.13);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.98);
  box-shadow: 0 18px 42px rgba(36, 48, 79, 0.18);
}

#registerForm .registration-language-picker-menu[hidden] {
  display: none;
}

#registerForm .registration-language-picker-menu button {
  display: flex;
  min-width: 0;
  min-height: 44px;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  background: transparent;
  color: var(--color-text-primary);
  cursor: pointer;
  font: inherit;
  font-size: 0.82rem;
  font-weight: 650;
  text-align: left;
}

#registerForm .registration-language-picker-menu button:hover,
#registerForm .registration-language-picker-menu button:focus-visible {
  border-color: rgba(101, 69, 226, 0.22);
  outline: none;
  background: var(--color-bg-selected);
}

#registerForm .registration-language-picker-menu button[aria-selected='true'] {
  border-color: rgba(47, 143, 104, 0.38);
  background: var(--color-success-bg);
}

#registerForm .registration-language-picker-menu button[hidden] {
  display: none;
}

#registerForm .registration-language-picker-menu-native,
#registerForm .registration-language-picker-menu-additional {
  grid-template-columns: minmax(0, 1fr);
}

#registerForm .language-chip-info {
  min-width: 0;
}

#registerForm .selected-languages-container:not(:empty) {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-4);
}

#registerForm .selected-languages-container > p {
  grid-column: 1 / -1;
}

#registerForm .language-chip {
  min-width: 0;
  min-height: 60px;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border-color: rgba(36, 48, 79, 0.09);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.76);
  box-shadow: 0 6px 16px rgba(36, 48, 79, 0.045);
}

#registerForm .language-chip:hover {
  border-color: rgba(36, 48, 79, 0.13);
  background: rgba(255, 255, 255, 0.92);
  box-shadow: 0 8px 18px rgba(36, 48, 79, 0.065);
  transform: none;
}

#registerForm .language-chip-flag {
  width: 34px;
  height: 24px;
  flex: 0 0 34px;
  border: 1px solid rgba(36, 48, 79, 0.13);
  border-radius: 999px;
  background-size: cover;
  box-shadow: 0 3px 8px rgba(36, 48, 79, 0.1);
}

#registerForm .language-chip-name {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

#registerForm .language-chip-level {
  width: 100%;
  min-width: 0;
  height: 44px;
  min-height: 44px;
  grid-template-columns: 12px minmax(2.2ch, 1fr) 12px;
  gap: 4px;
  padding: 0 8px;
  border-color: rgba(59, 95, 155, 0.2);
  border-radius: 999px;
  background-color: rgba(232, 240, 252, 0.82);
  background-image: none;
  color: var(--color-text-primary);
  font-weight: 750;
  appearance: none;
  -webkit-appearance: none;
  text-align: center;
  text-align-last: center;
}

#registerForm .language-chip-level-control {
  --guided-action-border: rgba(59, 95, 155, 0.42);
  --guided-action-focus: rgba(59, 95, 155, 0.2);
  flex: 0 0 84px;
}

#registerForm .registration-level-picker .guided-compact-picker-leading {
  width: 12px;
  height: 1px;
}

#registerForm .registration-level-picker .guided-compact-picker-caret {
  width: 7px;
  height: 7px;
  margin-right: 2px;
}

#registerForm .registration-level-picker .guided-compact-picker-menu {
  gap: 2px;
  padding: 5px;
  border-color: rgba(59, 95, 155, 0.18);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.99);
  box-shadow: 0 16px 34px rgba(36, 48, 79, 0.18);
}

#registerForm .registration-level-picker .guided-compact-picker-option {
  min-height: 42px;
  grid-template-columns: 12px minmax(2.2ch, 1fr) 12px;
  gap: 3px;
  padding: 7px 5px;
  border-radius: var(--radius-md);
  font-size: 0.86rem;
  font-weight: 700;
}

#registerForm .language-chip-remove {
  width: 44px;
  height: 44px;
  padding: 0;
  border: 1px solid rgba(122, 52, 80, 0.16);
  border-radius: 50%;
  background: rgba(122, 52, 80, 0.055);
  color: #7a3450;
}

#registerForm .language-chip-remove:hover {
  border-color: rgba(122, 52, 80, 0.3);
  background: rgba(122, 52, 80, 0.1);
  color: #6d2d47;
  transform: none;
}

#registerForm .language-chip-remove .ui-icon {
  width: 16px;
  height: 16px;
}

#registerForm .registration-language-picker-trigger {
  min-height: 48px;
  padding-left: var(--space-8);
  border-color: rgba(79, 70, 229, 0.28);
  border-radius: 999px;
  background: linear-gradient(135deg, rgba(101, 69, 226, 0.08), rgba(1, 179, 211, 0.06));
  box-shadow: 0 8px 18px rgba(36, 48, 79, 0.07);
  color: #384c8a;
  font-weight: 700;
}

#registerForm .language-selector-wrapper {
  margin-bottom: var(--space-8);
}

#registerForm .language-selector-wrapper::after {
  right: 18px;
  border-right-color: #5848c7;
  border-bottom-color: #5848c7;
}

#registerForm .selected-languages-container {
  min-height: 0;
}

#registerForm .selected-languages-container:empty {
  display: none;
}

#registerForm #languageSelectionStatus:empty {
  min-height: 0;
  margin: 0;
}

#registerForm #languageSelectionStatus {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  padding: 0;
  border: 0;
  margin: -1px;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
}

#registerForm > .privacy-notice {
  margin: 0;
  padding: 0 var(--space-4);
  color: var(--color-text-secondary);
  font-size: 0.78rem;
  line-height: 1.55;
}

#registerForm > .terms-group {
  display: grid;
  grid-template-columns: 22px minmax(0, 1fr);
  min-height: 58px;
  margin: 0;
  align-items: center;
  border-color: rgba(79, 70, 229, 0.18);
  background: var(--color-bg-selected);
}

#registerForm > .terms-group:focus-within {
  border-color: var(--color-border-focus);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.12);
}

#registerForm .terms-checkbox {
  width: 22px;
  height: 22px;
  flex: 0 0 22px;
  margin-top: 0;
}

#registerForm .terms-label {
  color: var(--color-text-secondary);
}

#registerForm > #registerBtn {
  min-height: 56px;
  margin-top: 0;
  border: 1px solid var(--auth-navy);
  box-shadow: 0 12px 24px rgba(36, 48, 79, 0.16);
}

#registerForm > #registerBtn:hover:not(:disabled) {
  box-shadow: 0 16px 28px rgba(36, 48, 79, 0.2);
}

#registerForm .registration-field-error {
  grid-column: 1 / -1;
  margin: 8px 0 0;
  color: #a33b2f;
  font-size: 0.85rem;
  font-weight: 600;
  line-height: 1.5;
  overflow-wrap: anywhere;
}

#registerForm .registration-field-error[hidden] {
  display: none;
}

#registerForm .registration-language-picker + .registration-field-error {
  max-width: 300px;
  margin-right: auto;
  margin-left: auto;
}

#registerForm #birthDayError:not([hidden]) + #ageInfo {
  display: none !important;
}

#registerForm .form-group input[aria-invalid='true'],
#registerForm .form-group input[aria-invalid='true']:hover,
#registerForm .form-group select[aria-invalid='true'],
#registerForm .form-group select[aria-invalid='true']:hover,
#registerForm .registration-language-picker-trigger[aria-invalid='true'] {
  border-color: #a33b2f;
  box-shadow: 0 0 0 3px rgba(163, 59, 47, 0.14);
}

#registerForm .terms-checkbox[aria-invalid='true'] {
  outline: 2px solid #a33b2f;
  outline-offset: 3px;
}

@media (min-width: 1180px) {
  #registerForm.active {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    align-items: start;
  }

  #registerForm > .form-section:nth-child(3),
  #registerForm > .privacy-notice,
  #registerForm > .terms-group,
  #registerForm > #registerBtn {
    grid-column: 1 / -1;
  }
}

@media (max-width: 1179px) {
  body.auth-registration-active .auth-shell {
    max-width: 920px;
    flex-direction: column;
  }

  body.auth-registration-active .brand-panel {
    width: 100%;
    max-width: none;
    flex: 0 0 auto;
    flex-basis: auto;
  }
}

@media (max-width: 768px) {
  body.auth-registration-active .auth-panel {
    padding: var(--space-10) var(--space-8);
  }

  #registerForm.active {
    gap: var(--space-8);
  }

  #registerForm .form-section {
    padding: var(--space-8);
  }

  #registerForm .language-chip {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 84px 44px;
    gap: var(--space-2);
  }

  #registerForm .language-chip-info {
    grid-column: 1;
    grid-row: 1;
  }

  #registerForm .language-chip-level-control {
    grid-column: 2;
    grid-row: 1;
    width: 100%;
    flex-basis: auto;
  }

  #registerForm .language-chip-remove {
    grid-column: 3;
    grid-row: 1;
  }

  #registerForm .selected-languages-container:not(:empty) {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (max-width: 340px) {
  #registerForm .birth-date-selectors {
    grid-template-columns: 0.82fr 1.15fr 1fr;
    gap: var(--space-2);
  }

  #registerForm .birth-date-selectors select {
    padding-left: var(--space-4);
    padding-right: 28px;
  }

  #registerForm .birth-date-selectors .registration-select-control::after {
    right: var(--space-4);
    width: 7px;
    height: 7px;
  }
}

@media (prefers-reduced-motion: reduce) {
  #registerForm .form-section {
    transition: none;
  }
}