/* ===================================
   AT THE LINE — Responsive Styles
   =================================== */

/* タブレット */
@media (max-width: 1024px) {
    :root {
        --space-xl: 32px;
    }

    .hero-grid {
        gap: 48px;
    }

    .hero-title {
        font-size: 36px;
    }

    .health-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .recent-layout {
        grid-template-columns: 1fr;
    }

    .sidebar {
        border-left: none;
        border-top: 1px solid var(--color-border);
        padding-left: 0;
        padding-top: var(--space-xl);
    }

    .recent-grid {
        grid-template-columns: 1fr 1fr;
    }

    .related-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .archive-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* モバイル */
@media (max-width: 768px) {
    :root {
        --space-xl: 20px;
        --header-height: 60px;
    }

    /* ヘッダー */
    .main-nav {
        display: none;
    }

    .main-nav.active {
        display: flex;
        flex-direction: column;
        position: fixed;
        top: var(--header-height);
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(13, 13, 13, 0.98);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        padding: var(--space-xl);
        gap: 24px;
        z-index: 99;
        align-items: flex-start;
    }

    .main-nav.active .nav-link {
        font-size: 14px;
        letter-spacing: 3px;
    }

    .mobile-toggle {
        display: flex !important;
        flex-direction: column;
        gap: 5px;
        cursor: pointer;
        background: none;
        border: none;
        padding: 4px;
    }

    .mobile-toggle span {
        display: block;
        width: 22px;
        height: 1px;
        background: var(--color-gold);
        transition: all 0.3s;
    }

    .mobile-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(4px, 4px);
    }

    .mobile-toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .mobile-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(4px, -4px);
    }

    .join-btn {
        display: none;
    }

    /* ロゴ */
    .logo-main,
    .logo-accent {
        font-size: 16px;
        letter-spacing: 4px;
    }

    /* ヒーロー */
    .hero-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .hero-image {
        aspect-ratio: 3/4;
    }

    .hero-title {
        font-size: 32px;
    }

    .hero-subtitle {
        font-size: 15px;
        margin-bottom: 24px;
    }

    .hero-footer {
        flex-direction: column;
        align-items: flex-start;
        gap: 20px;
    }

    .hero-issue {
        margin-bottom: 32px;
    }

    /* HEALTH */
    .health-grid {
        grid-template-columns: 1fr;
    }

    .health-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 16px;
    }

    .section-title {
        font-size: 24px;
    }

    .vets-note {
        flex-direction: column;
        text-align: center;
        gap: 12px;
    }

    /* Recent Articles */
    .recent-grid {
        grid-template-columns: 1fr;
    }

    /* 個別記事アイキャッチ（スマホ: 9:16） */
    .single-eyecatch {
        aspect-ratio: 9/16;
    }

    /* 個別記事 */
    .single-title {
        font-size: 30px;
    }

    .single-meta {
        flex-wrap: wrap;
        gap: 12px;
    }

    .related-grid {
        grid-template-columns: 1fr;
    }

    /* アーカイブ */
    .archive-grid {
        grid-template-columns: 1fr;
    }

    .archive-title {
        font-size: 28px;
    }

    /* フッター */
    .footer-inner {
        flex-direction: column;
        gap: 16px;
        text-align: center;
    }

    .footer-links {
        justify-content: center;
    }

    /* 検索モーダル */
    .search-modal .search-field {
        font-size: 20px;
    }

    .search-close {
        right: 20px;
    }

    /* 404 */
    .error-404 .error-code {
        font-size: 80px;
    }

    .error-404 .error-title {
        font-size: 22px;
    }
}

/* 小型スマホ */
@media (max-width: 375px) {
    :root {
        --space-xl: 16px;
    }

    .logo-main,
    .logo-accent {
        font-size: 14px;
        letter-spacing: 3px;
    }

    .hero-title {
        font-size: 26px;
    }

    .single-title {
        font-size: 24px;
    }
}

/* モバイルトグル（デフォルト非表示） */
.mobile-toggle {
    display: none;
}