/* ======================================
 * 比較ページ専用スタイル
 * Theme: Editorial / Magazine (Clean & Readable)
 * ====================================== */

:root {
    /* Editorial Palette */
    --c-text-body: #15213a;
    --c-text-header: #0d1b36;
    --c-text-muted: #5a6580;

    --c-link: #0b63e0;
    --c-link-hover: #0a52b6;

    --c-accent: #007aff;
    --c-accent-soft: #5ac8fa;
    --c-highlight-bg: #eff5ff;
    --c-border: #dbe7ff;

    --bg-body: #f7f9fc;
    --bg-paper: #ffffff;

    --shadow-soft: 0 14px 36px rgba(13, 27, 54, 0.08);
    --shadow-card: 0 12px 28px rgba(13, 27, 54, 0.06);

    --radius-md: 14px;
    --radius-lg: 20px;
    --radius-pill: 999px;

    --gradient-hero: radial-gradient(circle at 20% 20%, rgba(0, 122, 255, 0.18), transparent 32%), radial-gradient(circle at 80% 0%, rgba(90, 200, 250, 0.18), transparent 32%);

    /* Typography */
    --font-primary: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --leading-relaxed: 1.75;

    /* Spacing */
    --sp-section: 4rem;
    --sp-card-padding: 2rem;
}

@media (prefers-color-scheme: dark) {
    :root {
        --c-text-body: #dce6ff;
        --c-text-header: #f6f8ff;
        --c-text-muted: #a8b5d5;

        --c-link: #8cb6ff;
        --c-link-hover: #c3d7ff;

        --c-accent: #7ab2ff;
        --c-accent-soft: #7fd9ff;
        --c-highlight-bg: #132038;
        --c-border: #203053;

        --bg-body: #0b1020;
        --bg-paper: #111827;

        --shadow-soft: 0 18px 48px rgba(0, 0, 0, 0.55);
        --shadow-card: 0 12px 32px rgba(0, 0, 0, 0.45);
    }
}

/* Base Reset & Typography */
body {
    background-color: var(--bg-body);
    color: var(--c-text-body);
    font-family: var(--font-primary);
    line-height: var(--leading-relaxed);
    -webkit-font-smoothing: antialiased;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    color: var(--c-text-header);
    font-weight: 700;
    margin-bottom: 1em;
    line-height: 1.3;
    letter-spacing: -0.01em;
}

a {
    color: var(--c-link);
    text-decoration: underline;
    text-decoration-thickness: 1px;
    text-underline-offset: 3px;
    transition: color 0.2s ease;
}

a:hover {
    color: var(--c-link-hover);
    text-decoration-thickness: 2px;
}

/* Layout Utilities */
.main-content {
    width: min(1200px, 100% - 2.5rem);
    margin: 0 auto;
    padding: clamp(1.75rem, 3vw, 3rem) clamp(1.1rem, 3vw, 1.5rem);
    display: grid;
    grid-template-columns: 1fr;
    gap: 3rem;
}

@media (min-width: 900px) {
    .main-content {
        grid-template-columns: 240px 1fr;
        gap: 4rem;
    }
}

/* Sidebar (Navigation) */
.sidebar {
    position: sticky;
    top: 2rem;
    height: fit-content;
    padding-right: 1rem;
    border-right: 1px solid var(--c-border);
}

.sidebar h3 {
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--c-text-muted);
    margin-bottom: 1rem;
}

.sidebar-links {
    list-style: none;
    padding: 0;
    margin: 0 0 2rem 0;
}

.sidebar-links li {
    margin-bottom: 0.75rem;
}

.sidebar-links a {
    color: var(--c-text-body);
    text-decoration: none;
    font-size: 0.95rem;
    display: block;
}

.sidebar-links a:hover {
    color: var(--c-link);
    transform: translateX(3px);
}

/* CTA Button sidebar */
.cta-button {
    display: inline-block;
    background-color: var(--c-text-header);
    color: var(--bg-paper);
    padding: 0.8rem 1.2rem;
    border-radius: 4px;
    text-decoration: none;
    font-weight: 600;
    text-align: center;
    width: 100%;
    transition: opacity 0.2s;
}

.cta-button:hover {
    opacity: 0.9;
    color: var(--bg-paper);
    text-decoration: none;
}

/* Contact Card Sidebar */
.contact-card {
    font-size: 0.85rem;
    color: var(--c-text-muted);
    margin-top: 2rem;
    padding-top: 1rem;
    border-top: 1px solid var(--c-border);
}

.contact-card strong {
    color: var(--c-text-header);
}

/* Content Area */
.content-area {
    min-width: 0;
}

.page-hero {
    background: var(--bg-paper);
    background-image: var(--gradient-hero);
    border: 1px solid rgba(0, 122, 255, 0.14);
    border-radius: var(--radius-lg);
    padding: 2.4rem;
    box-shadow: var(--shadow-soft);
    position: relative;
    overflow: hidden;
}

.page-hero::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(120deg, rgba(255, 255, 255, 0.4), transparent 55%);
    pointer-events: none;
}

.eyebrow {
    display: inline-block;
    letter-spacing: 0.08em;
    font-size: 0.78rem;
    text-transform: uppercase;
    color: var(--c-accent);
    font-weight: 700;
    margin-bottom: 0.75rem;
}

.hero-title {
    font-size: clamp(1.9rem, 3vw, 2.4rem);
    margin-bottom: 1rem;
}

.hero-subtitle {
    color: var(--c-text-muted);
    font-size: 1.02rem;
    margin-bottom: 1.25rem;
}

.hero-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.pill {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.45rem 0.9rem;
    border-radius: var(--radius-pill);
    background: linear-gradient(120deg, rgba(0, 122, 255, 0.12), rgba(90, 200, 250, 0.12));
    color: var(--c-text-header);
    border: 1px solid rgba(0, 122, 255, 0.2);
    font-size: 0.9rem;
    font-weight: 600;
}

.pill-soft {
    background: rgba(14, 165, 233, 0.1);
    border-color: rgba(14, 165, 233, 0.3);
}

.pill-outline {
    background: transparent;
    border-color: var(--c-border);
}

.pill-ghost {
    background: rgba(0, 0, 0, 0.04);
    border-color: transparent;
}

.content-section {
    margin-bottom: var(--sp-section);
}

.section-title {
    font-size: 1.8rem;
    border-bottom: 2px solid var(--c-border);
    padding-bottom: 0.5rem;
    margin-bottom: 1.5rem;
}

.intro-grid {
    display: grid;
    grid-template-columns: minmax(0, 2fr) minmax(260px, 1fr);
    gap: 1.75rem;
    align-items: stretch;
    margin-top: 1.5rem;
}

.card-surface {
    background: linear-gradient(180deg, #ffffff, #f9fbff);
    border: 1px solid rgba(0, 122, 255, 0.12);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-card);
    padding: 1.8rem;
    min-width: 0;
}

.rich-text p {
    margin-bottom: 1rem;
    font-size: 1.02rem;
}

.alert-callout {
    background: linear-gradient(90deg, rgba(0, 122, 255, 0.12), rgba(90, 200, 250, 0.12));
    border: 1px solid rgba(0, 122, 255, 0.16);
    border-radius: var(--radius-md);
    padding: 1rem 1.25rem;
    margin: 1rem 0;
    font-weight: 700;
}

.stat-grid {
    display: grid;
    gap: 1rem;
    grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
}

.stat-card {
    background: #f1f6ff;
    border: 1px solid transparent;
    border-radius: var(--radius-lg);
    padding: 1.1rem 1.2rem;
    box-shadow: none;
}

.stat-label {
    font-size: 0.85rem;
    color: var(--c-text-muted);
    letter-spacing: 0.03em;
    text-transform: uppercase;
    margin-bottom: 0.35rem;
}

.stat-number {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--c-text-header);
}

.stat-note {
    margin-top: 0.4rem;
    color: var(--c-text-muted);
    font-size: 0.95rem;
}

.section-block {
    margin-top: 2.5rem;
    position: relative;
}

.section-heading {
    margin-bottom: 1.5rem;
}

.section-lead {
    color: var(--c-text-muted);
    margin-top: 0.5rem;
}

.article-title {
    font-size: 1.6rem;
    position: relative;
    padding-left: 0.75rem;
}

.article-title::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0.3rem;
    bottom: 0.3rem;
    width: 4px;
    border-radius: 999px;
    background: linear-gradient(180deg, var(--c-link), var(--c-accent));
}

.content-text {
    color: var(--c-text-body);
}

.content-text.single {
    margin-bottom: 0.75rem;
}

.content-text p {
    margin-bottom: 1.1rem;
}

.list-card {
    background: #f1f6ff;
    border: 1px solid transparent;
    border-radius: var(--radius-md);
    padding: 1rem 1.25rem;
    margin-top: 1.25rem;
    box-shadow: none;
}

.list-lead {
    font-weight: 700;
    margin-bottom: 0.75rem;
}

.check-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.modern-check {
    display: grid;
    gap: 0.75rem;
}

.modern-check li {
    position: relative;
    padding: 0.9rem 1rem 0.9rem 2.6rem;
    background: #ffffff;
    border: 1px solid rgba(0, 122, 255, 0.14);
    border-radius: var(--radius-md);
    box-shadow: none;
}

.modern-check li::before {
    content: "✓";
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--c-accent);
    font-weight: 800;
}

.point-stack {
    display: grid;
    gap: 1.5rem;
}

.point-card {
    background: linear-gradient(180deg, #ffffff, #f7faff);
    border: 1px solid rgba(0, 122, 255, 0.1);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    box-shadow: none;
    min-width: 0;
    overflow: hidden;
}

.subsection-title {
    font-size: 1.2rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin: 0 0 0.75rem 0;
    flex-wrap: wrap;
    word-break: break-word;
}

.subsection-title::before {
    content: "";
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: linear-gradient(120deg, var(--c-link), var(--c-accent));
}

.highlight-cost {
    background: linear-gradient(135deg, rgba(0, 122, 255, 0.12), rgba(90, 200, 250, 0.16));
    border-color: rgba(0, 122, 255, 0.22);
}

.cost-box ul {
    margin: 0.25rem 0 0 0;
    padding-left: 1.1rem;
    display: grid;
    gap: 0.35rem;
}

.highlight-point {
    color: var(--c-text-header);
    font-weight: 700;
}

.note-point {
    color: var(--c-text-muted);
}

.comparison-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    gap: 0.9rem;
}

.comparison-list li {
    background: #f4f8ff;
    border-radius: var(--radius-md);
    padding: 1rem 1.1rem;
    border: none;
    box-shadow: none;
    border-left: 4px solid rgba(0, 122, 255, 0.3);
}


/* Comparison Table */
.comparison-table-wrapper {
    overflow-x: auto;
    margin: 1.5rem 0;
    border: 1px solid var(--c-border);
    border-radius: var(--radius-lg);
    box-shadow: none;
    background: var(--bg-paper);
    max-width: 100%;
    -webkit-overflow-scrolling: touch;
    touch-action: pan-x;
}

.comparison-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.95rem;
    background: var(--bg-paper);
}

.comparison-table thead th {
    background: linear-gradient(135deg, rgba(0, 122, 255, 0.14), rgba(90, 200, 250, 0.12));
    color: var(--c-text-header);
    text-align: left;
    padding: 1.1rem 1rem;
    font-weight: 700;
    border-bottom: 1px solid var(--c-border);
}

.comparison-table tbody td {
    padding: 1rem 1rem;
    border-bottom: 1px solid var(--c-border);
    vertical-align: top;
}

/* Zebra striping for readability */
.comparison-table tbody tr:nth-child(even) {
    background-color: rgba(0, 0, 0, 0.02);
}

.highlight-cell {
    font-weight: 600;
    color: var(--c-link);
    background-color: rgba(0, 122, 255, 0.08);
}

.highlight-column {
    background-color: rgba(0, 122, 255, 0.08);
}

/* Reason Box */
.reason-box {
    border: 1px solid var(--c-border);
    padding: var(--sp-card-padding);
    margin: 2rem 0;
}

.reason-box h3 {
    text-align: center;
    font-size: 1.4rem;
    margin-bottom: 2rem;
}

.reason-list {
    list-style: none;
    padding: 0;
}

.reason-list li {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--c-border);
}

.reason-list li:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.reason-list li::before {
    content: "✓";
    color: var(--c-accent);
    font-weight: 900;
    font-size: 1.2rem;
}

.reason-list strong {
    display: block;
    margin-bottom: 0.25rem;
    font-size: 1.1rem;
    color: var(--c-text-header);
}

/* Maps */
.map-container {
    margin-top: 3rem;
    margin-bottom: 4rem;
}

.map-title {
    font-size: 1.1rem;
    margin-bottom: 1rem;
    display: flex;
    align-items: baseline;
    gap: 0.5rem;
}

.map-wrapper {
    position: relative;
    padding-bottom: 56.25%;
    height: 0;
    background: var(--c-highlight-bg);
    border: 1px solid var(--c-border);
}

.map-wrapper iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: 0;
}

.map-info {
    font-size: 0.9rem;
    color: var(--c-text-muted);
    margin-top: 0.5rem;
}

/* Cost Comparison */
.cost-comparison {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(0, 1fr));
    gap: 1.25rem;
    padding: 1.5rem;
    background-color: var(--c-highlight-bg);
    border: 1px solid var(--c-border);
    border-radius: var(--radius-lg);
    box-shadow: none;
    min-width: 0;
}

.cost-box {
    background: var(--bg-paper);
    border: 1px solid var(--c-border);
    border-radius: var(--radius-lg);
    padding: 1.25rem;
    box-shadow: none;
    min-width: 0;
}

.cost-head {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 0.75rem;
}

.cost-box h4 {
    margin: 0 0 0.4rem 0;
}

.cost-amount {
    display: block;
    font-size: 1.65rem;
    font-weight: 700;
    color: var(--c-text-header);
    margin-bottom: 0.35rem;
}

.cost-detail {
    font-size: 0.9rem;
    color: var(--c-text-muted);
}

.savings-box {
    background: linear-gradient(135deg, rgba(0, 122, 255, 0.12), rgba(90, 200, 250, 0.16));
    border: 1px solid var(--c-border);
    border-radius: var(--radius-lg);
    padding: 1.4rem;
    margin-top: 1rem;
    box-shadow: none;
}

.savings-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.5rem;
}

.recommendation-boxes {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1rem;
    margin-top: 1rem;
}

.recommendation-box {
    background: linear-gradient(180deg, #ffffff, #f8fbff);
    border: 1px solid rgba(0, 122, 255, 0.12);
    border-radius: var(--radius-lg);
    padding: 1.25rem;
    box-shadow: none;
}

.recommendation-box h3 {
    margin-top: 0;
    margin-bottom: 0.8rem;
}

.recommendation-box ul {
    padding-left: 1rem;
    margin: 0;
    display: grid;
    gap: 0.4rem;
}

.highlight-recommendation {
    background: linear-gradient(180deg, rgba(0, 122, 255, 0.08), rgba(90, 200, 250, 0.12));
}

.cta-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-top: 1.25rem;
}

.cta-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.9rem 1.4rem;
    border-radius: var(--radius-pill);
    font-weight: 700;
    text-decoration: none;
    transition: transform 0.15s ease, box-shadow 0.2s ease;
    border: 1px solid transparent;
}

.cta-btn.primary {
    background: linear-gradient(120deg, #0b63ce, #0ea5e9);
    color: #fff;
    box-shadow: 0 15px 35px rgba(11, 99, 206, 0.35);
}

.cta-btn.secondary {
    background: linear-gradient(120deg, #f5f9ff, #ffffff);
    border-color: rgba(0, 122, 255, 0.2);
    color: var(--c-text-header);
}

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

.instagram-cta {
    margin-top: 1.25rem;
    border: 1px solid rgba(0, 122, 255, 0.14);
    border-radius: var(--radius-md);
    padding: 1.2rem 1.4rem;
    background: linear-gradient(120deg, rgba(0, 122, 255, 0.08), rgba(90, 200, 250, 0.12));
    box-shadow: none;
    text-align: center;
}

.instagram-large-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.35rem;
    background: linear-gradient(120deg, #007aff, #5ac8fa);
    color: #fff;
    padding: 0.85rem 1.4rem;
    border-radius: var(--radius-pill);
    text-decoration: none;
    font-weight: 700;
    box-shadow: 0 14px 30px rgba(0, 122, 255, 0.25);
}

.gradient-panel {
    background: linear-gradient(180deg, rgba(11, 99, 206, 0.05), rgba(14, 165, 233, 0.08));
}

/* Mobile Responsiveness */
@media (max-width: 900px) {
    .sidebar {
        display: none;
        /* Hide sidebar on mobile for simpler flow */
    }

    .comparison-table-wrapper {
        margin: 1rem -1rem;
        /* Full bleed on small screens */
        width: calc(100% + 2rem);
        border-left: none;
        border-right: none;
    }

    .comparison-table {
        font-size: 0.85rem;
    }

    .main-content {
        width: 100%;
        padding: 2rem 1rem;
    }

    .page-hero,
    .card-surface {
        padding: 1.25rem;
    }

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

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

    .hero-tags {
        flex-direction: column;
    }

    .pill {
        width: 100%;
        justify-content: center;
        text-align: center;
    }

    .cost-comparison {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 0.75rem;
    }

    .cost-box {
        padding: 1rem;
    }
}

@media (max-width: 768px) {
    .main-content {
        width: 100%;
        padding: 0.75rem 0.75rem 1.25rem;
        gap: 1.25rem;
    }

    .page-hero {
        padding: 1.1rem;
        border-radius: 14px;
        box-shadow: 0 10px 22px rgba(0, 30, 70, 0.06);
    }

    .hero-title {
        font-size: 1.45rem;
    }

    .hero-subtitle {
        font-size: 0.95rem;
    }

    .hero-tags {
        gap: 0.6rem;
    }

    .pill {
        background: #ffffff;
        border-color: rgba(0, 122, 255, 0.16);
        box-shadow: 0 10px 24px rgba(0, 30, 70, 0.06);
    }

    .card-surface,
    .point-card,
    .recommendation-box,
    .savings-box,
    .instagram-cta {
        background: transparent;
        border: none;
        box-shadow: none;
        padding: 0.5rem 0 0.25rem;
        border-radius: 0;
    }

    .list-card {
        background: #eef4ff;
        border: none;
        box-shadow: none;
        border-radius: 12px;
        padding: 0.9rem 1rem;
    }

    .section-block {
        margin-top: 1.35rem;
    }

    .section-heading {
        margin-bottom: 1rem;
    }

    .article-title {
        padding-left: 0;
        font-size: 1.4rem;
    }

    .article-title::before {
        width: 32px;
        height: 4px;
        border-radius: 999px;
        top: auto;
        bottom: -6px;
        background: linear-gradient(120deg, #007aff, #5ac8fa);
    }

    .point-stack {
        gap: 1rem;
    }

    .comparison-table-wrapper {
        margin: 0.5rem -0.75rem 1rem;
        width: calc(100% + 1.5rem);
        border-left: none;
        border-right: none;
        border-radius: 0;
        padding: 0 0.35rem;
        box-shadow: none;
    }

    .comparison-table {
        font-size: 0.88rem;
    }

    .recommendation-boxes {
        grid-template-columns: 1fr;
        gap: 0.75rem;
    }

    .cta-buttons {
        flex-direction: column;
    }

    .cta-btn {
        width: 100%;
    }

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

    .cost-comparison {
        width: 100%;
        padding: 0;
        margin: 0;
        border: none;
        border-radius: 0;
        gap: 0.5rem;
    }

    .cost-box {
        background: #eef4ff;
        border: none;
        box-shadow: none;
        border-radius: 12px;
        padding: 0.9rem 1rem;
    }

    .savings-box {
        padding: 0.95rem;
        border-radius: 12px;
        background: #f2f6ff;
        border: none;
        box-shadow: none;
    }
}

@media (max-width: 600px) {
    .cost-comparison {
        grid-template-columns: 1fr;
    }
}

/* Dark mode surface adjustments */
@media (prefers-color-scheme: dark) {
    .card-surface,
    .point-card,
    .recommendation-box,
    .savings-box,
    .instagram-cta {
        background: transparent;
        border: none;
        box-shadow: none;
    }

    .stat-card,
    .list-card,
    .cost-box {
        background: transparent;
        border: none;
        box-shadow: none;
    }

    .list-card {
        color: var(--c-text-body);
    }

    .cost-comparison {
        background: transparent;
        border: none;
    }

    .cost-comparison .cost-box {
        background: rgba(124, 179, 255, 0.08);
        border: 1px solid rgba(124, 179, 255, 0.25);
        border-radius: var(--radius-lg);
        box-shadow: none;
    }

    .savings-box {
        background: rgba(124, 179, 255, 0.08);
        border: 1px solid rgba(124, 179, 255, 0.2);
        border-radius: var(--radius-lg);
    }

    .comparison-table-wrapper {
        border: none;
        background: transparent;
        box-shadow: none;
    }

    .comparison-table tbody tr:nth-child(even) {
        background-color: transparent;
    }

    .highlight-cell,
    .highlight-column {
        background-color: rgba(124, 179, 255, 0.08);
    }

    .modern-check li {
        background: transparent;
        border: 1px solid var(--c-border);
        color: var(--c-text-body);
        border-radius: var(--radius-md);
    }

    .comparison-list li {
        background: transparent;
        border: none;
        color: var(--c-text-body);
        border-left: 4px solid rgba(124, 179, 255, 0.5);
        border-radius: var(--radius-md);
    }

    .pill {
        background: transparent;
        border: 1px solid rgba(124, 179, 255, 0.35);
        color: var(--c-text-header);
        box-shadow: none;
    }

    .cta-btn.secondary {
        background: rgba(124, 179, 255, 0.12);
        border: 1px solid rgba(124, 179, 255, 0.35);
        color: var(--c-text-header);
        box-shadow: 0 12px 28px rgba(0, 0, 0, 0.25);
        border-radius: var(--radius-pill);
    }
}


/* ----------------------------------------------
 * サブナビ (nav-subnav / additional-nav) 制御
 * ---------------------------------------------- */
/* デスクトップ: nav-subnavを非表示 */
@media (min-width: 769px) {
    .nav-subnav { display: none; }
}

/* モバイル: additional-navを非表示、nav-subnavをハンバーガー内に表示 */
@media (max-width: 768px) {
    .additional-nav { display: none; }
    .nav-subnav {
        border-top: 2px solid rgba(0,0,0,0.06);
        margin-top: 0.5rem;
        padding-top: 0.5rem;
    }
    .nav-subnav-label {
        display: block;
        padding: 0.5rem 2rem;
        font-size: 0.72rem;
        font-weight: 700;
        letter-spacing: 0.1em;
        text-transform: uppercase;
        color: var(--text-light);
    }
    .nav-subnav a {
        display: block;
        padding: 0.75rem 2rem;
        color: var(--text-dark);
        text-decoration: none;
        font-size: 0.9rem;
        border-bottom: 1px solid rgba(0,0,0,0.04);
        transition: color 0.2s;
    }
    .nav-subnav a:hover { color: var(--primary-blue-start); }
}