/*
 * Smartmart ガイド記事専用CSS
 * /css/article.css
 * MacClaw風クリーンデザイン。インラインスタイル禁止。
 */

/* ===== コンテナ ===== */
.art-container {
    display: flex;
    gap: 40px;
    max-width: 1100px;
    margin: 32px auto;
    padding: 0 16px;
    align-items: flex-start;
}

.art-main {
    flex: 1 1 0;
    min-width: 0;
    max-width: 800px;
}

.art-sidebar {
    flex: 0 0 260px;
    width: 260px;
    position: sticky;
    top: 24px;
}

/* ===== パンくず ===== */
.art-breadcrumb {
    max-width: 1100px;
    margin: 16px auto 0;
    padding: 0 16px;
}

.art-breadcrumb-list {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
    list-style: none;
    margin: 0;
    padding: 0;
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.art-breadcrumb-item + .art-breadcrumb-item::before {
    content: '›';
    margin-right: 4px;
    color: var(--text-light);
}

.art-breadcrumb-item a {
    color: var(--primary-color);
    text-decoration: none;
}

.art-breadcrumb-item a:hover {
    text-decoration: underline;
}

.art-breadcrumb-item--active {
    color: var(--text-secondary);
}

/* ===== 記事ヘッダー ===== */
.art-header {
    margin-bottom: 32px;
    padding-bottom: 24px;
    border-bottom: 2px solid var(--border-color);
}

.art-h1 {
    font-size: 1.75rem;
    font-weight: 700;
    line-height: 1.4;
    color: var(--sm-black);
    margin: 0 0 16px;
}

.art-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    margin-bottom: 16px;
}

.art-meta-item {
    font-size: 0.82rem;
    color: var(--text-secondary);
}

.art-meta-item i {
    margin-right: 4px;
    color: var(--primary-color);
}

.art-lead {
    font-size: 1rem;
    line-height: 1.8;
    color: var(--text-primary);
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    padding: 16px 20px;
    margin: 0;
}

/* ===== 目次 ===== */
.art-toc {
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    padding: 20px 24px;
    margin-bottom: 40px;
}

.art-toc-title {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--sm-black);
    margin: 0 0 12px;
}

.art-toc-title i {
    margin-right: 6px;
    color: var(--primary-color);
}

.art-toc-list {
    margin: 0;
    padding-left: 20px;
}

.art-toc-item {
    margin: 6px 0;
    font-size: 0.88rem;
    line-height: 1.5;
}

.art-toc-item a {
    color: var(--primary-color);
    text-decoration: none;
}

.art-toc-item a:hover {
    text-decoration: underline;
}

/* ===== セクション ===== */
.art-section {
    margin-bottom: 48px;
}

.art-h2 {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--sm-black);
    border-left: 4px solid var(--primary-color);
    padding-left: 12px;
    margin: 0 0 20px;
    line-height: 1.4;
}

.art-h2 i {
    margin-right: 8px;
    color: var(--primary-color);
}

.art-section-body {
    font-size: 0.95rem;
    line-height: 1.85;
    color: var(--text-primary);
}

.art-section-body p {
    margin: 0 0 16px;
}

.art-section-body p:last-child {
    margin-bottom: 0;
}

.art-section-body ul,
.art-section-body ol {
    padding-left: 24px;
    margin: 0 0 16px;
}

.art-section-body li {
    margin: 6px 0;
    line-height: 1.7;
}

.art-section-body strong {
    color: var(--sm-black);
    font-weight: 700;
}

/* ===== テーブル ===== */
.art-table-wrap {
    overflow-x: auto;
    margin: 20px 0;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

.art-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.88rem;
    min-width: 480px;
}

.art-table th {
    background: var(--sm-black);
    color: #fff;
    font-weight: 600;
    padding: 12px 14px;
    text-align: left;
    white-space: nowrap;
}

.art-table td {
    padding: 10px 14px;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-primary);
    vertical-align: top;
}

.art-table tr:last-child td {
    border-bottom: none;
}

.art-table tr:nth-child(even) td {
    background: var(--bg-secondary);
}

.art-table .art-table-highlight {
    color: var(--primary-color);
    font-weight: 700;
}

/* ===== ステップガイド ===== */
.art-steps {
    counter-reset: art-step;
    padding: 0;
    list-style: none;
    margin: 20px 0;
}

.art-step {
    display: flex;
    gap: 16px;
    align-items: flex-start;
    margin-bottom: 20px;
    counter-increment: art-step;
}

.art-step-num {
    flex: 0 0 40px;
    width: 40px;
    height: 40px;
    background: var(--primary-color);
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1rem;
}

.art-step-body {
    flex: 1 1 0;
}

.art-step-title {
    font-weight: 700;
    color: var(--sm-black);
    margin: 0 0 4px;
    font-size: 0.95rem;
}

.art-step-desc {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin: 0;
    line-height: 1.7;
}

/* ===== ハイライトボックス ===== */
.art-box {
    border-radius: var(--radius-md);
    padding: 16px 20px;
    margin: 20px 0;
}

.art-box--info {
    background: #eff6ff;
    color: #1d4ed8;
}

.art-box--warn {
    background: #fffbeb;
    color: #92400e;
}

.art-box--success {
    background: #ecfdf5;
    color: #065f46;
}

.art-box-title {
    font-weight: 700;
    margin: 0 0 8px;
    font-size: 0.92rem;
}

.art-box-title i {
    margin-right: 6px;
}

/* ===== FAQ アコーディオン ===== */
.art-accordion {
    margin: 0;
}

.art-accordion-item {
    border-bottom: 1px solid var(--border-color);
}

.art-accordion-item:first-child {
    border-top: 1px solid var(--border-color);
}

.art-accordion-trigger {
    display: flex;
    align-items: center;
    gap: 10px;
    width: 100%;
    background: none;
    border: none;
    padding: 16px 0;
    cursor: pointer;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--sm-black);
    text-align: left;
    line-height: 1.5;
}

.art-accordion-trigger:hover {
    color: var(--primary-color);
}

.art-accordion-icon {
    margin-left: auto;
    flex-shrink: 0;
    transition: transform 0.25s ease;
    color: var(--text-secondary);
}

.art-accordion-trigger[aria-expanded="true"] .art-accordion-icon {
    transform: rotate(180deg);
}

.art-accordion-panel {
    display: none;
    padding: 0 0 16px;
    font-size: 0.92rem;
    line-height: 1.8;
    color: var(--text-primary);
}

.art-accordion-panel--open {
    display: flex;
    gap: 12px;
    align-items: flex-start;
}

.art-faq-q,
.art-faq-a {
    flex: 0 0 28px;
    width: 28px;
    height: 28px;
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.8rem;
    flex-shrink: 0;
}

.art-faq-q {
    background: var(--primary-color);
    color: #fff;
    margin-top: 2px;
}

.art-faq-a {
    background: var(--bg-secondary);
    color: var(--text-secondary);
    margin-top: 2px;
}

.art-faq-answer-text {
    flex: 1 1 0;
}

/* ===== CTA ===== */
.art-cta {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: #fff;
    border-radius: var(--radius-lg);
    padding: 36px 32px;
    margin: 48px 0;
    text-align: center;
}

.art-cta-heading {
    font-size: 1.2rem;
    font-weight: 700;
    margin: 0 0 12px;
}

.art-cta-heading i {
    margin-right: 8px;
}

.art-cta-body {
    font-size: 0.92rem;
    opacity: 0.9;
    margin: 0 0 24px;
    line-height: 1.7;
}

.art-cta-actions {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 12px;
}

.art-cta-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 28px;
    border-radius: var(--radius-md);
    font-size: 0.95rem;
    font-weight: 700;
    text-decoration: none;
    transition: opacity 0.2s, transform 0.2s;
}

.art-cta-btn:hover {
    opacity: 0.88;
    transform: translateY(-1px);
}

.art-cta-btn--primary {
    background: #fff;
    color: var(--primary-color);
}

.art-cta-btn--secondary {
    background: rgba(255, 255, 255, 0.15);
    color: #fff;
    border: 1px solid rgba(255, 255, 255, 0.4);
}

/* ===== サイドバー 関連記事 ===== */
.art-related {
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    padding: 20px;
}

.art-related-title {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--sm-black);
    margin: 0 0 16px;
}

.art-related-title i {
    margin-right: 6px;
    color: var(--primary-color);
}

.art-related-item {
    display: flex;
    flex-direction: column;
    gap: 4px;
    padding: 12px 0;
    border-bottom: 1px solid var(--border-color);
    text-decoration: none;
    transition: background 0.15s;
}

.art-related-item:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.art-related-item:hover .art-related-text {
    color: var(--primary-color);
}

.art-related-text {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--sm-black);
    line-height: 1.4;
}

.art-related-label {
    font-size: 0.78rem;
    color: var(--primary-color);
}

/* ===== レスポンシブ ===== */
@media (max-width: 900px) {
    .art-container {
        flex-direction: column;
        gap: 24px;
    }

    .art-sidebar {
        flex: none;
        width: 100%;
        position: static;
    }

    .art-h1 {
        font-size: 1.4rem;
    }

    .art-cta {
        padding: 24px 20px;
    }

    .art-cta-actions {
        flex-direction: column;
        align-items: center;
    }

    .art-cta-btn {
        width: 100%;
        justify-content: center;
    }
}

@media (max-width: 600px) {
    .art-h1 {
        font-size: 1.2rem;
    }

    .art-h2 {
        font-size: 1.1rem;
    }

    .art-toc {
        padding: 16px;
    }

    .art-cta {
        padding: 20px 16px;
    }
}