/* ========================================
   SPOCON - Registration Page
   ======================================== */

/* Page Layout */
.register-page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: var(--gray-50);
}

/* Minimal Header */
.register-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--white);
  border-bottom: 1px solid var(--gray-100);
}

.register-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.register-header__back {
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
  color: var(--gray-500);
  font-size: var(--font-size-sm);
  font-weight: 500;
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

/* Main Content */
.register-main {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-10) var(--spacing-4);
}

.register-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-16);
  max-width: 1000px;
  width: 100%;
  align-items: center;
}

/* Left Branding Panel */
.register-branding__inner {
  max-width: 400px;
}

.register-branding__title {
  font-size: var(--font-size-3xl);
  font-weight: 900;
  color: var(--gray-900);
  line-height: 1.3;
  margin-bottom: var(--spacing-4);
}

.register-branding__description {
  font-size: var(--font-size-base);
  color: var(--gray-600);
  line-height: 1.7;
  margin-bottom: var(--spacing-8);
}

.register-branding__features {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-4);
}

.register-branding__features li {
  display: flex;
  align-items: center;
  gap: var(--spacing-3);
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--gray-700);
}

.register-branding__features svg {
  color: var(--primary);
  flex-shrink: 0;
}

/* Registration Card */
.register-card {
  background: var(--white);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  padding: var(--spacing-10);
  border: 1px solid var(--gray-100);
}

.register-card__header {
  text-align: center;
  margin-bottom: var(--spacing-8);
}

.register-card__title {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: var(--spacing-2);
}

.register-card__subtitle {
  font-size: var(--font-size-sm);
  color: var(--gray-500);
}

/* Form Styles */
.register-form__row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-4);
}

.register-form__field {
  margin-bottom: var(--spacing-5);
}

.register-form__label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--gray-700);
  margin-bottom: var(--spacing-2);
}

.register-form__required {
  color: var(--primary);
}

.register-form__input {
  width: 100%;
  padding: 12px 16px;
  font-size: var(--font-size-base);
  font-family: inherit;
  color: var(--gray-900);
  background-color: var(--white);
  border: 2px solid var(--gray-200);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  -webkit-appearance: none;
  appearance: none;
}

.register-form__input::placeholder {
  color: var(--gray-400);
}

.register-form__input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(232, 41, 44, 0.1);
}

.register-form__input--error {
  border-color: var(--error);
}

.register-form__input--error:focus {
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

.register-form__input--valid {
  border-color: var(--success);
}

.register-form__select {
  cursor: pointer;
  padding-right: 40px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='20' height='20' fill='none' stroke='%236b7280' stroke-width='2' viewBox='0 0 24 24'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  background-size: 20px;
}

/* Password Toggle */
.register-form__password-wrap {
  position: relative;
}

.register-form__password-wrap .register-form__input {
  padding-right: 48px;
}

.register-form__toggle-pw {
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  cursor: pointer;
  color: var(--gray-400);
  padding: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color var(--transition-fast);
}

.register-form__toggle-pw:hover {
  color: var(--gray-600);
}

.register-form__toggle-pw .icon-eye-off {
  display: none;
}

.register-form__toggle-pw.is-visible .icon-eye {
  display: none;
}

.register-form__toggle-pw.is-visible .icon-eye-off {
  display: block;
}

/* Password Strength */
.register-form__pw-strength {
  margin-top: var(--spacing-2);
  opacity: 0;
  height: 0;
  overflow: hidden;
  transition: opacity var(--transition-fast), height var(--transition-fast);
}

.register-form__pw-strength.is-active {
  opacity: 1;
  height: auto;
}

.register-form__pw-bar {
  height: 4px;
  background-color: var(--gray-200);
  border-radius: var(--radius-full);
  overflow: hidden;
  margin-bottom: var(--spacing-1);
}

.register-form__pw-bar span {
  display: block;
  height: 100%;
  width: 0;
  border-radius: var(--radius-full);
  transition: width var(--transition-base), background-color var(--transition-base);
}

.register-form__pw-strength[data-level="weak"] .register-form__pw-bar span {
  width: 33%;
  background-color: var(--error);
}

.register-form__pw-strength[data-level="medium"] .register-form__pw-bar span {
  width: 66%;
  background-color: var(--warning);
}

.register-form__pw-strength[data-level="strong"] .register-form__pw-bar span {
  width: 100%;
  background-color: var(--success);
}

.register-form__pw-text {
  font-size: var(--font-size-xs);
  color: var(--gray-500);
}

/* Error Messages */
.register-form__error {
  display: none;
  font-size: var(--font-size-xs);
  color: var(--error);
  margin-top: var(--spacing-1);
}

.register-form__error.is-visible {
  display: block;
}

/* Checkbox / Terms */
.register-form__terms {
  margin-bottom: var(--spacing-6);
}

.register-form__checkbox {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-3);
  cursor: pointer;
  font-size: var(--font-size-sm);
  color: var(--gray-600);
  line-height: 1.5;
}

.register-form__checkbox input[type="checkbox"] {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.register-form__checkmark {
  width: 20px;
  height: 20px;
  min-width: 20px;
  border: 2px solid var(--gray-300);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
  margin-top: 1px;
}

.register-form__checkbox input:checked + .register-form__checkmark {
  background-color: var(--primary);
  border-color: var(--primary);
}

.register-form__checkbox input:checked + .register-form__checkmark::after {
  content: '';
  width: 6px;
  height: 10px;
  border: solid var(--white);
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
  margin-top: -2px;
}

.register-form__checkbox input:focus-visible + .register-form__checkmark {
  box-shadow: 0 0 0 3px rgba(232, 41, 44, 0.15);
}

.register-form__checkbox a {
  color: var(--primary);
  text-decoration: none;
  font-weight: 500;
}

.register-form__checkbox a:hover {
  text-decoration: underline;
}

/* Submit Button */
.register-form__submit {
  width: 100%;
  position: relative;
  font-size: var(--font-size-base);
  font-weight: 700;
  padding: 14px 24px;
}

.register-form__submit:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.register-form__submit.is-loading {
  color: transparent;
  pointer-events: none;
}

.register-form__submit.is-loading::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 20px;
  height: 20px;
  margin: -10px 0 0 -10px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: var(--white);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Card Footer */
.register-card__footer {
  text-align: center;
  margin-top: var(--spacing-6);
  padding-top: var(--spacing-6);
  border-top: 1px solid var(--gray-100);
}

.register-card__footer p {
  font-size: var(--font-size-sm);
  color: var(--gray-500);
}

.register-card__footer a {
  color: var(--primary);
  font-weight: 600;
  text-decoration: none;
}

.register-card__footer a:hover {
  text-decoration: underline;
}

/* Success Modal */
.register-modal {
  position: fixed;
  inset: 0;
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-4);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-base), visibility var(--transition-base);
}

.register-modal.is-active {
  opacity: 1;
  visibility: visible;
}

.register-modal__overlay {
  position: absolute;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
}

.register-modal__content {
  position: relative;
  background: var(--white);
  border-radius: var(--radius-xl);
  padding: var(--spacing-12) var(--spacing-10);
  text-align: center;
  max-width: 440px;
  width: 100%;
  box-shadow: var(--shadow-xl);
  transform: translateY(20px) scale(0.95);
  transition: transform var(--transition-base);
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 0;
}

.register-modal.is-active .register-modal__content {
  transform: translateY(0) scale(1);
}

.register-modal__icon {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.1), rgba(16, 185, 129, 0.2));
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--spacing-6);
  color: var(--success);
}

.register-modal__title {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: var(--spacing-3);
}

.register-modal__text {
  font-size: var(--font-size-sm);
  color: var(--gray-600);
  line-height: 1.7;
  margin-bottom: var(--spacing-4);
}

.register-modal__hint {
  font-size: var(--font-size-xs);
  color: var(--gray-500);
  line-height: 1.6;
  margin-bottom: var(--spacing-6);
  text-align: left;
}

.register-modal__hint:not([hidden]) {
  display: block;
}

.register-modal__content > .register-modal__btn {
  width: 100%;
  justify-content: center;
}

.register-modal__content > .register-modal__btn + .register-modal__btn {
  margin-top: var(--spacing-2);
}

.register-modal__btn {
  display: inline-flex;
  text-decoration: none;
}

.register-modal__btn--secondary {
  border: 1px solid var(--gray-300);
  color: var(--gray-800);
  background: var(--white);
}

/* Minimal Footer */
.register-footer {
  border-top: 1px solid var(--gray-200);
  background-color: var(--white);
  padding: var(--spacing-6) 0;
}

.register-footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: var(--font-size-xs);
  color: var(--gray-400);
}

.register-footer__links {
  display: flex;
  gap: var(--spacing-6);
}

.register-footer__links a {
  color: var(--gray-400);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.register-footer__links a:hover {
  color: var(--gray-600);
}

/* メール確認コールバック（register/auth-callback.html） */
.auth-callback__nav {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-3);
  margin-top: var(--spacing-6);
}

.auth-callback__nav .btn {
  width: 100%;
  justify-content: center;
}

/* ========================================
   Responsive
   ======================================== */
@media (max-width: 768px) {
  .register-container {
    grid-template-columns: 1fr;
    gap: var(--spacing-8);
    max-width: 480px;
  }

  .register-branding {
    text-align: center;
  }

  .register-branding__inner {
    max-width: 100%;
  }

  .register-branding__title {
    font-size: var(--font-size-2xl);
  }

  .register-branding__features {
    display: none;
  }

  .register-card {
    padding: var(--spacing-8) var(--spacing-6);
  }

  .register-form__row {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .register-footer__inner {
    flex-direction: column;
    gap: var(--spacing-3);
    text-align: center;
  }

  .register-modal__content {
    padding: var(--spacing-8) var(--spacing-6);
  }
}

@media (max-width: 480px) {
  .register-main {
    padding: var(--spacing-6) var(--spacing-4);
  }

  .register-card {
    padding: var(--spacing-6) var(--spacing-4);
    border-radius: var(--radius-lg);
  }

  .register-card__title {
    font-size: var(--font-size-xl);
  }
}

@media (prefers-reduced-motion: reduce) {
  .register-modal__content,
  .register-modal {
    transition: none !important;
  }
}