/* GetResponse 訂閱表單樣式 */
.antarctica-custom-subscription-form {
    max-width: 100%;
    margin: 0;
    padding: 0;
    background: transparent;
    font-family: "Roboto", Arial, sans-serif;
}

.subscription-form {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.form-row {
    display: flex;
    gap: 10px;
    align-items: stretch;
    background: #000000;
    border-radius: 6px;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.subscription-email-input {
    height: 42px;
    flex: 1;
    font-size: 16px;
    border: 1px solid rgba(0,0,0,.12);
    background: #ffffff;
    color: #333333;
    padding: 0 1rem !important;
    outline: none;
    box-sizing: border-box;
    min-width: 0;
    border-radius: 8px !important;
}

.subscription-email-input::placeholder {
    color: #999999;
    font-size: 16px;
}

.subscription-email-input:focus {
    background: #ffffff;
    color: #333333;
}

.subscription-submit-btn {
    height: 42px;
    padding: 01rem !important;
    font-size: 16px;
    font-weight: 500;
    color: #333333;
    background: #dcdcdc;
    border: none;
    cursor: pointer;
    transition: all 0.2s ease;
    white-space: nowrap;
    min-width: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px !important;
    position: relative;
    overflow: hidden;
}

/* 簡單 loading：保持按鈕尺寸不變，居中顯示轉圈 */
.subscription-submit-btn.is-loading {
    position: relative;
}
.subscription-submit-btn.is-loading::after {
    content: '';
    position: absolute;
    width: 16px;
    height: 16px;
    border: 2px solid rgba(0,0,0,0.25);
    border-top-color: rgba(0,0,0,0.7);
    border-radius: 50%;
    animation: btn-spin 0.8s linear infinite;
}
@keyframes btn-spin { to { transform: rotate(360deg); } }

.subscription-submit-btn:hover {
    background: #cccccc;
    color: #222222;
}

.subscription-submit-btn:active {
    background: #bbbbbb;
    transform: translateY(1px);
}

.subscription-submit-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.btn-loading {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
}

.loading-spinner {
    animation: spin 1s linear infinite;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.form-error {
    color: #e74c3c;
    font-size: 14px;
    margin-top: 8px;
    text-align: left;
    display: none;
    background: #ffffff;
    padding: 8px 12px;
    border-radius: 4px;
    border-left: 3px solid #e74c3c;
}

.form-error.show {
    display: block;
}

.form-success {
    background: #d4edda;
    border: 1px solid #c3e6cb;
    border-radius: 4px;
    padding: 12px;
    margin-top: 8px;
    display: none;
}

.success-message {
    color: #155724;
    font-weight: 500;
    font-size: 14px;
}

.antarctica-subscription-error {
    background: #f8d7da;
    color: #721c24;
    padding: 12px;
    border-radius: 4px;
    border: 1px solid #f5c6cb;
    text-align: center;
    font-size: 14px;
}

/* 響應式設計 */
@media (max-width: 768px) {
    .subscription-email-input {
        border-radius: 6px 6px 0 0;
    }
    
    .subscription-submit-btn {
        padding: 14px 16px;
    }
}

@media (max-width: 480px) {
    .subscription-email-input {
        font-size: 16px; /* 防止iOS縮放 */
        padding: 14px 16px;
    }
    
    .subscription-submit-btn {
        font-size: 16px;
        padding: 14px 20px;
    }
}