/* ==========================================
   Register Page Styles
   註冊頁面局部樣式 - 只負責表單字段樣式
   File: /public/css/pages/auth/register.css
   Version: 2.0
   Date: 2025-10-14
   
   依賴: auth-master.css (提供基礎樣式)
   ========================================== */

/* ========================================
   1. Register Specific Variables
   ======================================== */
.auth-page--register {
    --reg-primary: #667eea;
    --reg-primary-dark: #5a67d8;
    --reg-secondary: #764ba2;
    --reg-success: #48BB78;
    --reg-error: #F56565;
    --reg-warning: #ED8936;
}

/* ========================================
   2. Header Section
   ======================================== */
.register-header {
    text-align: center;
    margin-bottom: 32px;
}

.register-header__title {
    font-size: 28px;
    font-weight: 700;
    color: #1A202C;
    margin-bottom: 8px;
    letter-spacing: -0.5px;
}

.register-header__subtitle {
    font-size: 15px;
    color: #718096;
    font-weight: 400;
}

/* ========================================
   3. Email Row (Email + Send Code Button)
   ======================================== */
.register-email-row {
    display: flex;
    gap: 12px;
    align-items: flex-start;
    margin-bottom: 20px;
}

.register-email-row .auth-page__field {
    flex: 1;
    margin-bottom: 0;
}

/* Send Code Button */
.register-code-button {
    flex-shrink: 0;
    padding: 14px 24px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 10px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    white-space: nowrap;
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
    height: 52px;
    margin-top: 28px;
}

.register-code-button:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(102, 126, 234, 0.4);
}

.register-code-button:active:not(:disabled) {
    transform: translateY(0);
}

.register-code-button:disabled {
    background: linear-gradient(135deg, #CBD5E0 0%, #A0AEC0 100%);
    cursor: not-allowed;
    box-shadow: none;
}

/* ========================================
   4. Input Success Icon
   ======================================== */
.register-input-success-icon {
    position: absolute;
    right: 48px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--reg-success);
    font-size: 18px;
    font-weight: bold;
    display: none;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.auth-page__input--valid ~ .register-input-success-icon {
    display: block;
    opacity: 1;
    animation: successPop 0.4s ease;
}

@keyframes successPop {
    0% { transform: translateY(-50%) scale(0); }
    50% { transform: translateY(-50%) scale(1.3); }
    100% { transform: translateY(-50%) scale(1); }
}

/* ========================================
   5. Error Messages
   ======================================== */
.register-error-message {
    display: block;
    color: var(--reg-error);
    font-size: 13px;
    margin-top: 6px;
    min-height: 18px;
    animation: slideDown 0.3s ease;
}

.register-error-message:empty {
    display: none;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ========================================
   6. Resend Button (inside verification code input)
   ======================================== */
.register-resend-button {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--reg-primary);
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    text-decoration: underline;
    padding: 4px 8px;
    transition: color 0.2s ease;
}

.register-resend-button:hover:not(:disabled) {
    color: var(--reg-primary-dark);
}

.register-resend-button:disabled {
    color: #CBD5E0;
    cursor: not-allowed;
    text-decoration: none;
}

/* ========================================
   7. Password Strength Indicator
   ======================================== */
.register-password-strength {
    margin-top: 10px;
    display: none;
}

.register-password-strength.is-visible {
    display: block;
    animation: fadeIn 0.3s ease;
}

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

.register-password-strength__bar {
    height: 4px;
    background: #E2E8F0;
    border-radius: 2px;
    overflow: hidden;
    margin-bottom: 6px;
}

.register-password-strength__fill {
    height: 100%;
    transition: all 0.4s ease;
    border-radius: 2px;
}

/* Strength Levels */
.register-password-strength__fill--very-weak {
    width: 20%;
    background: #F56565;
}

.register-password-strength__fill--weak {
    width: 40%;
    background: #ED8936;
}

.register-password-strength__fill--fair {
    width: 60%;
    background: #ECC94B;
}

.register-password-strength__fill--good {
    width: 80%;
    background: #48BB78;
}

.register-password-strength__fill--strong {
    width: 100%;
    background: #38A169;
}

.register-password-strength__text {
    font-size: 12px;
    font-weight: 500;
}

.register-password-strength__text--very-weak { color: #F56565; }
.register-password-strength__text--weak { color: #ED8936; }
.register-password-strength__text--fair { color: #ECC94B; }
.register-password-strength__text--good { color: #48BB78; }
.register-password-strength__text--strong { color: #38A169; }

/* ========================================
   8. Terms Checkbox
   ======================================== */
.register-terms {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    margin: 24px 0;
    padding: 16px;
    background: rgba(102, 126, 234, 0.05);
    border-radius: 10px;
    border: 1px solid rgba(102, 126, 234, 0.1);
}

.register-terms__checkbox {
    position: relative;
    width: 20px;
    height: 20px;
    flex-shrink: 0;
    margin-top: 2px;
}

.register-terms__checkbox input {
    width: 100%;
    height: 100%;
    cursor: pointer;
    opacity: 0;
    position: absolute;
    top: 0;
    left: 0;
    z-index: 2;
    margin: 0;
}

.register-terms__checkbox-box {
    position: absolute;
    top: 0;
    left: 0;
    width: 20px;
    height: 20px;
    border: 2px solid #CBD5E0;
    border-radius: 4px;
    background: white;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.register-terms__checkbox input:checked ~ .register-terms__checkbox-box {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-color: #667eea;
}

.register-terms__checkbox input:checked ~ .register-terms__checkbox-box::after {
    content: '✓';
    color: white;
    font-size: 14px;
    font-weight: 700;
}

.register-terms__checkbox input:focus ~ .register-terms__checkbox-box {
    outline: 2px solid #667eea;
    outline-offset: 2px;
}

.register-terms__label {
    flex: 1;
    font-size: 14px;
    color: #4A5568;
    line-height: 1.6;
    cursor: pointer;
}

.register-terms__label a {
    color: #667eea;
    text-decoration: underline;
    font-weight: 500;
    transition: color 0.2s ease;
}

.register-terms__label a:hover {
    color: #5a67d8;
}

/* ========================================
   9. Submit Button
   ======================================== */
.register-submit-button {
    width: 100%;
    padding: 16px 24px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 16px;
    font-weight: 600;
    letter-spacing: 0.3px;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 14px rgba(102, 126, 234, 0.4);
    position: relative;
    overflow: hidden;
    margin-top: 8px;
}

.register-submit-button::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s ease;
}

.register-submit-button:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.5);
}

.register-submit-button:hover:not(:disabled)::before {
    left: 100%;
}

.register-submit-button:active:not(:disabled) {
    transform: translateY(0);
}

.register-submit-button:disabled {
    background: linear-gradient(135deg, #CBD5E0 0%, #A0AEC0 100%);
    cursor: not-allowed;
    box-shadow: none;
    opacity: 0.6;
}

.register-submit-button:focus-visible {
    outline: 2px solid #667eea;
    outline-offset: 2px;
}

/* Loading State */
.register-submit-button__text {
    display: inline-block;
}

.register-submit-button__spinner {
    display: none;
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin: 0 auto;
}

.register-submit-button.is-loading .register-submit-button__text {
    display: none;
}

.register-submit-button.is-loading .register-submit-button__spinner {
    display: block;
}

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

/* ========================================
   10. Footer
   ======================================== */
.register-footer {
    text-align: center;
    margin-top: 28px;
    padding-top: 24px;
    border-top: 1px solid #E2E8F0;
}

.register-footer__text {
    font-size: 14px;
    color: #718096;
    display: inline;
}

.register-footer__link {
    color: #667eea;
    text-decoration: none;
    font-weight: 600;
    margin-left: 6px;
    transition: color 0.2s ease;
}

.register-footer__link:hover {
    color: #5a67d8;
    text-decoration: underline;
}

/* ========================================
   11. Enhanced Input States (Register Specific)
   ======================================== */
.auth-page--register .auth-page__input:focus {
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.auth-page--register .auth-page__input--error {
    border-color: var(--reg-error);
    background: #FFF5F5;
    animation: shake 0.4s ease;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-8px); }
    75% { transform: translateX(8px); }
}

.auth-page--register .auth-page__input--valid {
    border-color: var(--reg-success);
    background: #F0FFF4;
}

/* ========================================
   12. Responsive Design
   ======================================== */
@media (max-width: 640px) {
    .register-header__title {
        font-size: 24px;
    }

    .register-header__subtitle {
        font-size: 14px;
    }

        gap: 0;
    }

    .register-email-row .auth-page__field {
        margin-bottom: 16px;
    }

    .register-code-button {
        width: 100%;
        margin-top: 0;
    }

    .register-terms {
        padding: 12px;
    }

    .register-terms__label {
        font-size: 13px;
    }

    .register-submit-button {
        padding: 14px 20px;
        font-size: 15px;
    }
}

/* ========================================
   13. Accessibility
   ======================================== */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* High Contrast Mode Support */
@media (prefers-contrast: high) {
    .register-code-button,
    .register-submit-button {
        border: 2px solid currentColor;
    }
}

/* ========================================
   14. Error Animation
   ======================================== */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.form-field__error {
    animation: fadeIn 0.3s ease-in;
}

/* ==========================================================================
   Notification Toast for Registration Page
   ========================================================================== */

.r-notification {
  position: fixed;
  top: 80px;
  right: 20px;
  z-index: 9999;
  min-width: 320px;
  max-width: 420px;
  padding: 16px 20px;
  background: white;
  border-radius: 12px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12), 0 2px 8px rgba(0, 0, 0, 0.08);
  display: flex;
  align-items: center;
  gap: 12px;
  transform: translateX(calc(100% + 40px));
  opacity: 0;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  pointer-events: auto;
  font-size: 14px;
  line-height: 1.5;
}

.r-notification--show {
  transform: translateX(0);
  opacity: 1;
  animation: slideIn 0.3s ease-out;
}

@keyframes slideIn {
  from {
    transform: translateX(calc(100% + 40px));
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

/* Notification Types */
.r-notification--success {
  border-left: 4px solid #10b981;
  background: linear-gradient(to right, #ecfdf5 0%, white 20%);
}

.r-notification--success::before {
  content: '✓';
  display: flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: #10b981;
  color: white;
  font-weight: bold;
  font-size: 16px;
  flex-shrink: 0;
}

.r-notification--error {
  border-left: 4px solid #ef4444;
  background: linear-gradient(to right, #fef2f2 0%, white 20%);
}

.r-notification--error::before {
  content: '✕';
  display: flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: #ef4444;
  color: white;
  font-weight: bold;
  font-size: 16px;
  flex-shrink: 0;
}

.r-notification--warning {
  border-left: 4px solid #f59e0b;
  background: linear-gradient(to right, #fffbeb 0%, white 20%);
}

.r-notification--warning::before {
  content: '⚠';
  display: flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: #f59e0b;
  color: white;
  font-weight: bold;
  font-size: 16px;
  flex-shrink: 0;
}

.r-notification--info {
  border-left: 4px solid #3b82f6;
  background: linear-gradient(to right, #eff6ff 0%, white 20%);
}

.r-notification--info::before {
  content: 'ℹ';
  display: flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: #3b82f6;
  color: white;
  font-weight: bold;
  font-size: 16px;
  flex-shrink: 0;
}

/* Mobile Responsive */
@media (max-width: 768px) {
  .r-notification {
    right: 10px;
    left: 10px;
    min-width: auto;
    max-width: none;
    top: 70px;
  }
}

/* Print - Hide notifications */
@media print {
  .r-notification {
    display: none !important;
  }
}

/* ========================================
   郵箱欄位與註冊按鈕同行佈局 (Email + Button Same Row)
   ======================================== */

.register-email-row {
    display: flex;
    gap: 12px;
    align-items: flex-start;
}

.register-email-input {
    flex: 1;
    min-width: 0; /* 允許 flexbox 縮小 */
}

/* 註冊按鈕樣式 */
.register-button {
    flex-shrink: 0;
    min-width: 120px;
    height: 48px;
    padding: 0 24px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #ffffff;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.register-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(102, 126, 234, 0.4);
}

.register-button:active {
    transform: translateY(0);
}

.register-button:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.register-button__text {
    display: inline-block;
    transition: opacity 0.3s ease;
}

.register-button__spinner {
    display: none;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-top-color: #ffffff;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    position: absolute;
}

.register-button.is-loading .register-button__text {
    opacity: 0;
}

.register-button.is-loading .register-button__spinner {
    display: block;
}

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

/* ========================================
   響應式設計 (Responsive Design)
   ======================================== */

/* 平板 (Tablet) */
@media (max-width: 768px) {
    .register-email-row {
        gap: 10px;
    }
    
    .register-button {
        min-width: 100px;
        padding: 0 20px;
        font-size: 15px;
    }
}


/* ========================================
   手機版優化：郵箱欄位與按鈕同行
   ======================================== */

/* 手機版 (Mobile) - 優化郵箱輸入框寬度 */
@media (max-width: 480px) {
    .register-email-row {
        gap: 8px;
    }
    
    /* 限制郵箱輸入框寬度，確保按鈕有空間 */
    .register-email-input {
        flex: 1;
        max-width: calc(100% - 98px); /* 90px按鈕 + 8px間距 */
    }
    
    .register-button {
        min-width: 90px;
        max-width: 90px;
        height: 44px;
        padding: 0 12px;
        font-size: 14px;
    }
}

/* 小手機 (Small Mobile) - 進一步優化 */
@media (max-width: 360px) {
    .register-email-row {
        gap: 6px;
    }
    
    /* 更小的輸入框，確保按鈕完整顯示 */
    .register-email-input {
        flex: 1;
        max-width: calc(100% - 86px); /* 80px按鈕 + 6px間距 */
    }
    
    .register-button {
        min-width: 80px;
        max-width: 80px;
        padding: 0 8px;
        font-size: 13px;
    }
}

/* 超小手機 (Extra Small) - 320px */
@media (max-width: 320px) {
    .register-email-row {
        gap: 5px;
    }
    
    .register-email-input {
        flex: 1;
        max-width: calc(100% - 75px); /* 70px按鈕 + 5px間距 */
    }
    
    .register-button {
        min-width: 70px;
        max-width: 70px;
        padding: 0 6px;
        font-size: 12px;
    }
    
    /* 縮小輸入框內部元素 */
    .register-email-input .auth-page__input {
        font-size: 14px;
        padding-left: 36px; /* 減少左側padding */
    }
    
    .register-email-input .auth-page__input-icon {
        width: 16px;
        height: 16px;
    }
}


/* 確保所有尺寸都保持橫向排列 */
@media (max-width: 640px) {
    .register-email-row {
        flex-direction: row !important;  /* 強制橫向排列 */
    }
}


/* ========================================
   Submit Button (獨立註冊按鈕)
   ======================================== */
.register-submit-button {
    width: 100%;
    height: 52px;
    margin: 24px 0 20px;
    padding: 0 32px;
    
    background: linear-gradient(135deg, var(--reg-primary) 0%, var(--reg-secondary) 100%);
    border: none;
    border-radius: 12px;
    
    font-size: 16px;
    font-weight: 600;
    color: #ffffff;
    text-align: center;
    
    cursor: pointer;
    transition: all 0.3s ease;
    
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
}

.register-submit-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.4);
}

.register-submit-button:active {
    transform: translateY(0);
}

.register-submit-button:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.register-submit-button__text {
    display: inline-block;
}

.register-submit-button__spinner {
    display: none;
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: #ffffff;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

.register-submit-button.is-loading .register-submit-button__text {
    display: none;
}

.register-submit-button.is-loading .register-submit-button__spinner {
    display: block;
}

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

/* Responsive */
@media (max-width: 640px) {
    .register-submit-button {
        height: 48px;
        font-size: 15px;
        margin: 20px 0 16px;
    }
}

@media (max-width: 480px) {
    .register-submit-button {
        height: 46px;
        font-size: 14px;
    }
}