/**
 * 推薦碼彈窗樣式（重構版 - 簡潔統一）
 */

/* 模態框遮罩 */
.referral-modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  z-index: 9999;
  align-items: center;
  justify-content: center;
  padding: 20px;
  backdrop-filter: blur(5px);
}

.referral-modal-overlay.active {
  display: flex;
}

/* 模態框內容 */
.referral-modal-content {
  background: var(--bg-secondary);
  border-radius: 12px;
  width: 100%;
  max-width: 450px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
}

/* 頭部 */
.referral-modal-header {
  padding: 24px 24px 20px;
  border-bottom: 1px solid var(--border-color);
}

.referral-modal-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-primary);
  margin: 0;
  text-align: center;
}

/* 主體 */
.referral-modal-body {
  padding: 24px;
}

/* 錯誤提示 */
.referral-error-message {
  display: none;
  padding: 12px 16px;
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid rgba(239, 68, 68, 0.3);
  border-radius: 8px;
  color: #ef4444;
  font-size: 13px;
  margin-bottom: 16px;
}

.referral-error-message.show {
  display: block;
}

/* 表單組 */
.referral-form-group {
  margin-bottom: 16px;
}

/* 輸入框 */
.referral-form-input {
  width: 100%;
  padding: 12px 16px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  color: var(--text-primary);
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 1px;
  text-transform: uppercase;
  transition: all 0.2s;
  box-sizing: border-box;
}

.referral-form-input:focus {
  outline: none;
  border-color: var(--accent-color);
  background: var(--bg-secondary);
}

.referral-form-input::placeholder {
  color: var(--text-tertiary);
  text-transform: none;
  letter-spacing: normal;
  font-weight: normal;
}

/* 複選框組 */
.referral-checkbox-group {
  margin-bottom: 20px;
}

.referral-checkbox-label {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  font-size: 14px;
  color: var(--text-secondary);
  user-select: none;
}

.referral-checkbox {
  width: 16px;
  height: 16px;
  cursor: pointer;
  accent-color: var(--accent-color);
}

.referral-checkbox-label:hover {
  color: var(--text-primary);
}

/* 按鈕組 */
.referral-buttons {
  display: flex;
  gap: 12px;
}

/* 按鈕統一樣式 */
.referral-skip-btn,
.referral-submit-btn {
  flex: 1;
  padding: 10px 20px;
  border: 1px solid;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: background-color 0.2s, border-color 0.2s, color 0.2s;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  box-sizing: border-box;
}

/* 略過按鈕 */
.referral-skip-btn {
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  border-color: var(--border-color);
}

.referral-skip-btn:hover:not(:disabled) {
  background: var(--bg-secondary);
  color: var(--text-primary);
  border-color: var(--text-tertiary);
}

/* 確認按鈕 */
.referral-submit-btn {
  background: var(--accent-color);
  color: white;
  border-color: var(--accent-color);
}

.referral-submit-btn:hover:not(:disabled) {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
}

/* 禁用狀態 */
.referral-skip-btn:disabled,
.referral-submit-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* 加載動畫 */
.referral-loading {
  display: inline-block;
  width: 12px;
  height: 12px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: white;
  border-radius: 50%;
  animation: referral-spin 0.6s linear infinite;
}

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

/* 響應式 */
@media (max-width: 600px) {
  .referral-modal-content {
    max-width: 100%;
    margin: 0 12px;
  }

  .referral-modal-header {
    padding: 20px 20px 16px;
  }

  .referral-modal-body {
    padding: 20px;
  }

  .referral-modal-title {
    font-size: 16px;
  }

  .referral-buttons {
    flex-direction: column;
  }

  .referral-skip-btn,
  .referral-submit-btn {
    width: 100%;
  }
}