/* ===== 質問箱ヒーローセクション ===== */
.qbox-hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 60px 0;
    text-align: center;
}

.qbox-hero-content {
    max-width: 700px;
    margin: 0 auto;
}

.qbox-icon {
    width: 100px;
    height: 100px;
    margin: 0 auto 25px;
    background-color: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    backdrop-filter: blur(10px);
}

.qbox-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 15px;
}

.qbox-subtitle {
    font-size: 1.1rem;
    opacity: 0.95;
    line-height: 1.6;
}

/* ===== 質問投稿セクション ===== */
.question-submit-section {
    padding: 60px 0;
    background-color: var(--bg-secondary);
}

.submit-card {
    max-width: 800px;
    margin: 0 auto;
    background-color: var(--bg-primary);
    border-radius: 16px;
    padding: 40px;
    box-shadow: var(--shadow-lg);
}

.submit-title {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 30px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.submit-title i {
    color: var(--primary-color);
}

.form-group {
    margin-bottom: 25px;
}

.form-group label {
    display: block;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 10px;
    font-size: 1rem;
}

.question-textarea {
    width: 100%;
    padding: 16px;
    border: 2px solid var(--border-color);
    border-radius: 12px;
    font-size: 1rem;
    font-family: 'Noto Sans JP', sans-serif;
    line-height: 1.6;
    resize: vertical;
    min-height: 120px;
    transition: var(--transition);
}

.question-textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.1);
}

.submit-btn {
    width: 100%;
    padding: 16px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    font-family: 'Noto Sans JP', sans-serif;
}

.submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

.success-message {
    padding: 16px 20px;
    background-color: #d1fae5;
    color: #065f46;
    border-radius: 12px;
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 600;
    margin-top: 20px;
    animation: slideDown 0.3s ease;
}

.success-message i {
    font-size: 1.3rem;
}

/* ===== Q&A一覧セクション ===== */
.qa-list-section {
    padding: 60px 0;
    background-color: var(--bg-primary);
}

.qa-filter {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-bottom: 40px;
}

.filter-btn {
    padding: 10px 24px;
    background-color: var(--bg-secondary);
    color: var(--text-secondary);
    border: 2px solid var(--border-color);
    border-radius: 25px;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 8px;
    font-family: 'Noto Sans JP', sans-serif;
}

.filter-btn:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.filter-btn.active {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    border-color: var(--primary-color);
}

.qa-container {
    max-width: 900px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 25px;
}

.qa-card {
    background-color: var(--bg-secondary);
    border-radius: 16px;
    padding: 30px;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    animation: fadeInUp 0.4s ease;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.qa-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-3px);
}

.question-section {
    margin-bottom: 25px;
    padding-bottom: 25px;
    border-bottom: 2px solid var(--border-color);
}

.question-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 15px;
}

.question-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, #f59e0b, #d97706);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    flex-shrink: 0;
}

.question-label {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
}

.question-text {
    font-size: 1rem;
    line-height: 1.8;
    color: var(--text-primary);
    padding-left: 52px;
}

.answer-section {
    background-color: white;
    padding: 20px;
    border-radius: 12px;
}

.answer-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 15px;
}

.answer-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    flex-shrink: 0;
}

.answer-label {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
}

.answer-author {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.answer-text {
    font-size: 1rem;
    line-height: 1.8;
    color: var(--text-primary);
    padding-left: 52px;
}

.qa-date {
    text-align: right;
    margin-top: 15px;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.loading {
    text-align: center;
    padding: 60px;
    font-size: 1.2rem;
    color: var(--text-secondary);
}

.loading i {
    font-size: 2rem;
    margin-right: 10px;
}

.empty-state {
    text-align: center;
    padding: 80px 20px;
    color: var(--text-secondary);
}

.empty-state i {
    font-size: 5rem;
    margin-bottom: 20px;
    opacity: 0.3;
}

.empty-state p {
    font-size: 1.1rem;
}

/* ===== レスポンシブデザイン ===== */
@media (max-width: 768px) {
    .qbox-hero {
        padding: 40px 0;
    }

    .qbox-icon {
        width: 80px;
        height: 80px;
        font-size: 2.5rem;
    }

    .qbox-title {
        font-size: 2rem;
        padding: 0 15px;
    }

    .qbox-subtitle {
        font-size: 1rem;
        padding: 0 15px;
    }

    .question-submit-section {
        padding: 40px 0;
    }

    .submit-card {
        padding: 25px 20px;
        margin: 0 10px;
    }

    .submit-title {
        font-size: 1.4rem;
    }

    .question-textarea {
        font-size: 1rem;
        min-height: 100px;
    }

    .submit-btn {
        padding: 14px;
        font-size: 1rem;
    }

    .qa-list-section {
        padding: 40px 0;
    }

    .qa-filter {
        flex-wrap: wrap;
        gap: 10px;
    }

    .filter-btn {
        flex: 1;
        min-width: 120px;
        justify-content: center;
        padding: 12px 20px;
    }

    .qa-container {
        gap: 20px;
    }

    .qa-card {
        padding: 20px 16px;
    }

    .question-section {
        margin-bottom: 20px;
        padding-bottom: 20px;
    }

    .question-header,
    .answer-header {
        gap: 10px;
    }

    .question-icon,
    .answer-icon {
        width: 36px;
        height: 36px;
        font-size: 1.1rem;
    }

    .question-label,
    .answer-label {
        font-size: 1rem;
    }

    .question-text,
    .answer-text {
        padding-left: 0;
        margin-top: 10px;
        font-size: 0.95rem;
    }

    .answer-section {
        padding: 16px;
    }
}

@media (max-width: 480px) {
    .qbox-hero {
        padding: 30px 0;
    }

    .qbox-icon {
        width: 70px;
        height: 70px;
        font-size: 2rem;
    }

    .qbox-title {
        font-size: 1.6rem;
    }

    .qbox-subtitle {
        font-size: 0.9rem;
    }

    .question-submit-section {
        padding: 30px 0;
    }

    .submit-card {
        padding: 20px 15px;
    }

    .submit-title {
        font-size: 1.3rem;
        gap: 8px;
    }

    .submit-title i {
        font-size: 1.2rem;
    }

    .question-textarea {
        font-size: 0.95rem;
        padding: 14px;
    }

    .submit-btn {
        padding: 13px;
        font-size: 0.95rem;
    }

    .qa-list-section {
        padding: 30px 0;
    }

    .section-title {
        font-size: 1.4rem;
    }

    .section-subtitle {
        font-size: 0.85rem;
    }

    .qa-filter {
        gap: 8px;
    }

    .filter-btn {
        font-size: 0.85rem;
        padding: 10px 16px;
    }

    .qa-card {
        padding: 16px 12px;
    }

    .question-header,
    .answer-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
    }

    .question-icon,
    .answer-icon {
        width: 32px;
        height: 32px;
        font-size: 1rem;
    }

    .question-label,
    .answer-label {
        font-size: 0.95rem;
    }

    .question-text,
    .answer-text {
        font-size: 0.9rem;
        line-height: 1.7;
    }

    .answer-section {
        padding: 14px;
    }

    .qa-date {
        font-size: 0.8rem;
    }

    .success-message {
        font-size: 0.9rem;
        padding: 14px 16px;
    }
}