/**
 * ニュースレター購読フォームのスタイル
 * テーマに合わせたシンプルなデザイン
 */

/* ==========================================================================
   共通変数（カラー）
   ========================================================================== */
:root {
    --newsletter-primary: var(--color-primary);
    --newsletter-primary-hover: #0284c7;
    --newsletter-text-light: rgba(255, 255, 255, 0.85);
    --newsletter-text-muted: rgba(255, 255, 255, 0.6);
    --newsletter-text-dark: #666666;
    --newsletter-border-light: rgba(255, 255, 255, 0.2);
    --newsletter-success-bg: rgba(16, 185, 129, 0.15);
    --newsletter-success-border: rgba(16, 185, 129, 0.3);
    --newsletter-success-color: #10b981;
    --newsletter-error-bg: rgba(239, 68, 68, 0.15);
    --newsletter-error-border: rgba(239, 68, 68, 0.3);
    --newsletter-error-color: #ef4444;
}

/* ==========================================================================
   基本レイアウト
   ========================================================================== */
.newsletter-form {
    padding: 40px 0;
    color: #ffffff;
}

.newsletter-content {
    max-width: 600px;
    margin: 0 auto;
}

/* ==========================================================================
   タイトルと説明文
   ========================================================================== */
.newsletter-title {
    margin: 0 0 12px 0;
    font-size: 20px;
    font-weight: 600;
    color: #ffffff;
    display: flex;
    align-items: center;
    gap: 10px;
}

.newsletter-title i {
    font-size: 20px;
    color: var(--newsletter-primary);
}

.newsletter-description {
    margin: 0 0 24px 0;
    font-size: 15px;
    line-height: 1.6;
    color: var(--newsletter-text-light);
}

/* ==========================================================================
   フォーム要素
   ========================================================================== */
.newsletter-subscribe-form {
    margin-bottom: 16px;
}

.newsletter-form-group {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.newsletter-input-wrapper {
    display: flex;
    gap: 8px;
}

/* メールアドレス入力欄 */
.newsletter-email-input {
    flex: 1;
    padding: 12px 16px;
    border: 1px solid var(--newsletter-border-light);
    border-radius: 6px;
    font-size: 15px;
    background: rgba(255, 255, 255, 0.05);
    color: #ffffff;
    transition: all 0.3s ease;
}

.newsletter-email-input::placeholder {
    color: rgba(255, 255, 255, 0.5);
}

/* 送信ボタン */
.newsletter-submit-btn {
    padding: 12px 28px;
    background: var(--newsletter-primary);
    color: #ffffff;
    border: none;
    border-radius: 6px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    white-space: nowrap;
}

.newsletter-submit-btn:hover:not(:disabled) {
    background: var(--newsletter-primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 115, 170, 0.3);
}

.newsletter-submit-btn:active:not(:disabled) {
    transform: translateY(0);
}

.newsletter-submit-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* プライバシーポリシー同意 */
.newsletter-privacy {
    padding-left: 4px;
}

.newsletter-checkbox-label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: rgba(255, 255, 255, 0.8);
    cursor: pointer;
}

.newsletter-checkbox-label input[type="checkbox"] {
    width: 16px;
    height: 16px;
    cursor: pointer;
    accent-color: var(--newsletter-primary);
}

.newsletter-checkbox-label a {
    color: var(--newsletter-primary);
    text-decoration: underline;
}

.newsletter-checkbox-label a:hover {
    color: var(--newsletter-primary-hover);
}

/* ==========================================================================
   メッセージ表示
   ========================================================================== */
.newsletter-message {
    margin-top: 16px;
    padding: 12px 16px;
    border-radius: 6px;
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 10px;
    animation: slideDown 0.3s ease;
}

.newsletter-message i {
    font-size: 16px;
}

.newsletter-message-success {
    background: var(--newsletter-success-bg);
    border: 1px solid var(--newsletter-success-border);
    color: var(--newsletter-success-color);
}

.newsletter-message-error {
    background: var(--newsletter-error-bg);
    border: 1px solid var(--newsletter-error-border);
    color: var(--newsletter-error-color);
}

.newsletter-note {
    margin: 0;
    font-size: 12px;
    color: var(--newsletter-text-muted);
    text-align: center;
}

.newsletter-note i {
    margin-right: 4px;
}

/* ==========================================================================
   バリエーション：フッター用
   ========================================================================== */
.newsletter-form-footer {
    padding: 30px 0;
}

.newsletter-form-footer .newsletter-title {
    font-size: 18px;
}

.newsletter-form-footer .newsletter-description {
    font-size: 14px;
    margin-bottom: 20px;
}

/* ==========================================================================
   バリエーション：インライン用（ブログ記事末尾）
   ========================================================================== */
.newsletter-form-inline {
    margin: 60px 0;
    color: #333333;
}

.newsletter-form-inline .newsletter-title {
    font-size: 22px;
    text-align: center;
    justify-content: center;
    color: #333333;
}

.newsletter-form-inline .newsletter-title i {
    color: var(--newsletter-primary);
}

.newsletter-form-inline .newsletter-description {
    text-align: center;
    font-size: 15px;
    color: var(--newsletter-text-dark);
}

.newsletter-form-inline .newsletter-email-input {
    background: #ffffff;
    border: 1px solid #ddd;
    color: #333333;
}

.newsletter-form-inline .newsletter-email-input:focus {
    border-color: var(--newsletter-primary);
}

.newsletter-form-inline .newsletter-email-input::placeholder {
    color: #999999;
}

.newsletter-form-inline .newsletter-checkbox-label {
    color: var(--newsletter-text-dark);
}

.newsletter-form-inline .newsletter-note {
    color: #999999;
}

/* ==========================================================================
   フォーカス状態とアクセシビリティ
   ========================================================================== */
.newsletter-submit-btn:focus,
.newsletter-email-input:focus {
    outline: 2px solid var(--newsletter-primary);
    outline-offset: 2px;
    border-color: var(--newsletter-primary);
    background: rgba(255, 255, 255, 0.1);
    box-shadow: 0 0 0 3px rgba(0, 115, 170, 0.1);
}

.newsletter-form-inline .newsletter-email-input:focus {
    background: #ffffff;
}

.newsletter-checkbox-label:focus-within {
    outline: 2px solid var(--newsletter-primary);
    outline-offset: 2px;
    border-radius: 4px;
}

/* ==========================================================================
   アニメーション
   ========================================================================== */
@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

.newsletter-submit-btn .btn-loading i {
    animation: spin 1s linear infinite;
}

/* ==========================================================================
   レスポンシブ対応
   ========================================================================== */

/* タブレット */
@media (max-width: 768px) {
    .newsletter-form,
    .newsletter-form-footer {
        padding: 30px 0;
    }

    .newsletter-title {
        font-size: 18px;
    }

    .newsletter-title i {
        font-size: 18px;
    }

    .newsletter-description {
        font-size: 14px;
    }

    .newsletter-input-wrapper {
        flex-direction: column;
        gap: 10px;
    }

    .newsletter-email-input,
    .newsletter-submit-btn {
        width: 100%;
        padding: 12px 16px;
        font-size: 14px;
    }

    .newsletter-submit-btn {
        padding: 12px 24px;
    }

    .newsletter-form-inline {
        margin: 40px 0;
    }

    .newsletter-form-inline .newsletter-title {
        font-size: 20px;
    }

    .newsletter-form-inline .newsletter-description {
        font-size: 14px;
    }
}

/* スマートフォン */
@media (max-width: 480px) {
    .newsletter-form,
    .newsletter-form-footer {
        padding: 24px 0;
    }

    .newsletter-title {
        font-size: 16px;
    }

    .newsletter-description {
        font-size: 13px;
        margin-bottom: 20px;
    }

    .newsletter-checkbox-label {
        font-size: 12px;
    }

    .newsletter-form-inline .newsletter-title {
        font-size: 18px;
    }
}