@charset "utf-8";

/* ========================================
   Insights 共通レイアウト
   ======================================== */

.insights-body {
    background: #66CCCC;
    font-family: 'Sawarabi Gothic', sans-serif;
    color: #000;
    font-size: 1rem;
    line-height: 1.85;
    -webkit-font-smoothing: antialiased;
    min-height: 100vh;
}

/* ヘッダー */
.ins-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 100;
    padding: 16px 5vw;
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: #66CCCC;
    border-bottom: 1px solid rgba(0,0,0,0.08);
}

.ins-header-logo {
    font-family: 'Teko', sans-serif;
    font-size: 1.6rem;
    color: #000;
    text-decoration: none;
    letter-spacing: 0.05em;
}

.ins-header-nav {
    display: flex;
    gap: 24px;
    align-items: center;
}

.ins-header-nav a {
    color: #000;
    text-decoration: none;
    font-size: 0.85rem;
    letter-spacing: 0.08em;
    opacity: 0.7;
    transition: opacity 0.2s;
}

.ins-header-nav a:hover {
    opacity: 1;
}

.ins-header-nav a.active {
    opacity: 1;
    font-weight: bold;
}

/* メインコンテンツ */
.ins-main {
    max-width: 860px;
    margin: 0 auto;
    padding: 100px 5vw 80px;
}

/* ページタイトル */
.ins-page-title {
    font-family: 'Teko', sans-serif;
    font-size: 3rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    margin: 0 0 8px 0;
    line-height: 1;
}

.ins-page-desc {
    font-size: 0.95rem;
    opacity: 0.75;
    margin: 0 0 56px 0;
    line-height: 1.7;
}

/* ========================================
   記事一覧
   ======================================== */

.ins-list {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.ins-card {
    display: block;
    padding: 28px 0;
    border-bottom: 1px solid rgba(0,0,0,0.15);
    text-decoration: none;
    color: inherit;
    transition: background 0.2s;
}

.ins-card:first-child {
    border-top: 1px solid rgba(0,0,0,0.15);
}

.ins-card:hover {
    background: rgba(0,0,0,0.04);
    padding-left: 12px;
    padding-right: 12px;
    margin-left: -12px;
    margin-right: -12px;
}

.ins-card-meta {
    display: flex;
    align-items: center;
    gap: 16px;
    margin: 0 0 10px 0;
}

.ins-card-date {
    font-size: 0.78rem;
    opacity: 0.6;
    letter-spacing: 0.04em;
}

.ins-card-tag {
    font-size: 0.72rem;
    border: 1px solid rgba(0,0,0,0.3);
    padding: 1px 8px;
    border-radius: 2px;
    letter-spacing: 0.06em;
    opacity: 0.7;
}

.ins-card-title {
    font-size: 1.15rem;
    font-weight: bold;
    margin: 0 0 10px 0;
    line-height: 1.5;
}

.ins-card-summary {
    font-size: 0.88rem;
    opacity: 0.75;
    margin: 0;
    line-height: 1.75;
}

.ins-card-arrow {
    display: inline-block;
    margin-top: 12px;
    font-size: 0.8rem;
    letter-spacing: 0.1em;
    opacity: 0.5;
}

/* ========================================
   記事詳細ページ
   ======================================== */

/* パンくず */
.ins-breadcrumb {
    font-size: 0.78rem;
    opacity: 0.6;
    margin: 0 0 32px 0;
    display: flex;
    gap: 8px;
    align-items: center;
}

.ins-breadcrumb a {
    color: #000;
    text-decoration: none;
    opacity: 0.7;
    transition: opacity 0.2s;
}

.ins-breadcrumb a:hover {
    opacity: 1;
}

.ins-breadcrumb span {
    opacity: 0.5;
}

/* 記事ヘッダー */
.art-header {
    margin: 0 0 48px 0;
    padding: 0 0 32px 0;
    border-bottom: 2px solid #000;
}

.art-meta {
    display: flex;
    gap: 16px;
    align-items: center;
    margin: 0 0 16px 0;
}

.art-date {
    font-size: 0.8rem;
    opacity: 0.6;
}

.art-tag {
    font-size: 0.72rem;
    border: 1px solid rgba(0,0,0,0.3);
    padding: 1px 8px;
    border-radius: 2px;
    opacity: 0.7;
}

.art-title {
    font-size: 1.7rem;
    font-weight: bold;
    line-height: 1.45;
    margin: 0 0 16px 0;
    letter-spacing: 0.02em;
}

@media screen and (max-width: 768px) {
    .art-title {
        font-size: 1.3rem;
    }
}

.art-lead {
    font-size: 1rem;
    line-height: 1.9;
    opacity: 0.85;
    margin: 0;
}

/* 記事本文 */
.art-body {
    margin: 0 0 56px 0;
    line-height: 1.9;
}

.art-body h2 {
    font-size: 1.3rem;
    font-weight: bold;
    margin: 48px 0 16px 0;
    padding: 0 0 8px 0;
    border-bottom: 2px solid #000;
    letter-spacing: 0.02em;
    text-align: left;
    text-transform: none;
}

.art-body h3 {
    font-size: 1.1rem;
    font-weight: bold;
    margin: 32px 0 12px 0;
    padding: 0 0 0 12px;
    border-left: 3px solid #000;
    letter-spacing: 0.02em;
}

.art-body p {
    margin: 0 0 20px 0;
}

.art-body ul, .art-body ol {
    padding-left: 1.5em;
    margin: 0 0 20px 0;
}

.art-body ul {
    list-style: disc;
}

.art-body ol {
    list-style: decimal;
}

.art-body li {
    margin: 6px 0;
    line-height: 1.8;
}

.art-body blockquote {
    border-left: 3px solid rgba(0,0,0,0.3);
    padding: 8px 20px;
    margin: 24px 0;
    opacity: 0.8;
    font-style: italic;
}

.art-body table {
    width: 100%;
    border-collapse: collapse;
    margin: 24px 0;
    font-size: 0.9rem;
}

.art-body th, .art-body td {
    border: 1px solid rgba(0,0,0,0.25);
    padding: 10px 14px;
    text-align: left;
}

.art-body th {
    background: rgba(0,0,0,0.08);
    font-weight: bold;
}

/* まとめ */
.art-summary {
    background: rgba(0,0,0,0.06);
    border-left: 4px solid #000;
    padding: 24px 28px;
    margin: 0 0 56px 0;
    border-radius: 0 4px 4px 0;
}

.art-summary h2 {
    font-size: 1rem;
    font-weight: bold;
    margin: 0 0 12px 0;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.art-summary ul {
    list-style: disc;
    padding-left: 1.4em;
    margin: 0;
}

.art-summary li {
    margin: 6px 0;
    line-height: 1.7;
    font-size: 0.95rem;
}

/* 関連記事 */
.ins-related {
    margin: 0 0 56px 0;
}

.ins-related h2 {
    font-family: 'Teko', sans-serif;
    font-size: 1.4rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    margin: 0 0 20px 0;
    border-bottom: 1px solid rgba(0,0,0,0.15);
    padding-bottom: 8px;
}

.ins-related-list {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.ins-related-item {
    display: block;
    padding: 16px 0;
    border-bottom: 1px solid rgba(0,0,0,0.1);
    text-decoration: none;
    color: inherit;
    font-size: 0.9rem;
    transition: opacity 0.2s;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.ins-related-item:hover {
    opacity: 0.65;
}

.ins-related-item-title {
    flex: 1;
}

.ins-related-item-arrow {
    font-size: 0.75rem;
    opacity: 0.4;
    margin-left: 16px;
}

/* 関連サービス */
.ins-services {
    background: rgba(0,0,0,0.06);
    padding: 32px 28px;
    border-radius: 4px;
    margin: 0 0 56px 0;
}

.ins-services h2 {
    font-family: 'Teko', sans-serif;
    font-size: 1.3rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    margin: 0 0 16px 0;
}

.ins-services p {
    font-size: 0.9rem;
    opacity: 0.8;
    margin: 0 0 20px 0;
}

.ins-services-links {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.ins-services-link {
    display: inline-block;
    padding: 8px 20px;
    border: 2px solid #000;
    color: #000;
    text-decoration: none;
    font-size: 0.85rem;
    letter-spacing: 0.06em;
    transition: background 0.2s, color 0.2s;
}

.ins-services-link:hover {
    background: #000;
    color: #66CCCC;
}

/* フッター */
.ins-footer {
    border-top: 1px solid rgba(0,0,0,0.15);
    padding: 32px 5vw;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
}

.ins-footer-links {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
}

.ins-footer-links a {
    color: #000;
    text-decoration: none;
    font-size: 0.8rem;
    opacity: 0.65;
    letter-spacing: 0.06em;
    transition: opacity 0.2s;
}

.ins-footer-links a:hover {
    opacity: 1;
}

.ins-footer-copy {
    font-family: 'Teko', sans-serif;
    font-size: 0.85rem;
    opacity: 0.5;
    letter-spacing: 0.08em;
}

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

@media screen and (max-width: 768px) {
    .ins-main {
        padding: 80px 6vw 60px;
    }

    .ins-page-title {
        font-size: 2rem;
    }

    .ins-header-nav {
        gap: 16px;
    }

    .ins-header-nav a {
        font-size: 0.78rem;
    }

    .ins-footer {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }

    .ins-services-links {
        flex-direction: column;
    }
}

@media screen and (max-width: 480px) {
    .ins-header-nav a:not(.back-top) {
        display: none;
    }

    .art-body h2 {
        font-size: 1.15rem;
    }
}