#content-en {
    display: none;
}

#content-ja {
    display: none;
}

:root {
    --ink: #1a1a1a;
    --ink-light: #555;
    --rule: #d4cfc9;
    --bg: #fff7ef;
    --accent: #34688b;
    --accent-light: #edf7f7;
    --section-num: #555;
    --font-family-text: "Barlow", sans-serif;
    --font-family-header: "Commissioner", sans-serif;

    --navbar-height: 48px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
    background: var(--bg);
    color: var(--ink);
    font-family: var(--font-family-text);
    font-weight: 300;
    line-height: 1.8;
    font-size: 16px;
    padding-top: var(--navbar-height);
}

body strong {
    font-weight: 600;
}



/* ── Navbar ── */
.top-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(250, 248, 245, 0.92);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--rule);
    height: var(--navbar-height);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 2rem;
}

.top-nav a {
    text-decoration: none;
    display: flex;
    align-items: center;
}

.nav-brand-text {
    font-family: var(--font-family-text);
    font-weight: 300;
    /* font-style: italic; */
    color: var(--accent);
    padding-left: 0.6rem;
}

.lang-dropdown {
    position: relative;
}

.lang-dropdown-btn {
    display: flex;
    align-items: center;
    gap: 0.45rem;
    background: none;
    border: 1px solid var(--rule);
    border-radius: 4px;
    padding: 0.3rem 0.75rem;
    font-family: var(--font-family-text);
    font-size: 0.78rem;
    font-weight: 400;
    color: var(--ink-light);
    cursor: pointer;
    transition: border-color 0.15s, color 0.15s;
    letter-spacing: 0.02em;
}

.lang-dropdown-btn:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.lang-dropdown-btn svg {
    transition: transform 0.2s;
    flex-shrink: 0;
}

.lang-dropdown.open .lang-dropdown-btn svg {
    transform: rotate(180deg);
}

.lang-dropdown-menu {
    display: none;
    position: absolute;
    top: calc(100% + 6px);
    right: 0;
    min-width: 160px;
    background: var(--bg);
    border: 1px solid var(--rule);
    border-radius: 4px;
    box-shadow: 0 4px 16px rgba(0,0,0,0.08);
    overflow: hidden;
}

.lang-dropdown.open .lang-dropdown-menu {
    display: block;
}

.lang-dropdown-menu a {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.6rem 1rem;
    font-family: 'DM Sans', sans-serif;
    font-size: 0.85rem;
    color: var(--ink);
    text-decoration: none;
    transition: background 0.12s;
    border-bottom: none;
}

.lang-dropdown-menu a:hover {
    background: var(--accent-light);
    color: var(--accent);
}

.lang-flag {
    font-size: 1rem;
    line-height: 1;
}



/* ── Header ── */
header {
    border-bottom: 1px solid var(--rule);
    padding: 3rem 0 2.5rem;
    text-align: center;
}

header .eyebrow {
    font-family: var(--font-family-text);
    font-weight: 500;
    font-size: 0.7rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 1rem;
}

header h1 {
    font-family: var(--font-family-header);
    font-size: clamp(2rem, 5vw, 3.0rem);
    font-weight: 700;
    letter-spacing: 0.02em;
    line-height: 1.15;
    margin-bottom: 1.5rem;
}

header .meta {
    font-size: 0.85rem;
    color: var(--ink-light);
}

/* ── Layout ── */
.wrap {
    max-width: 760px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* ── Table of Contents ── */
.toc {
    margin: 3rem 0;
    background: var(--accent-light);
    border-left: 3px solid var(--accent);
    padding: 2rem 2.5rem;
}

.toc h2 {
    font-family: var(--font-family-text);
    font-weight: 500;
    font-size: 0.7rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 1.2rem;
}

.toc ol {
    list-style: none;
    counter-reset: toc;
}

.toc li {
    counter-increment: toc;
    display: flex;
    gap: 0.75rem;
    padding: 0.2rem 0;
    font-size: 0.9rem;
}

.toc li::before {
    content: counter(toc, decimal-leading-zero);
    font-family: var(--font-family-header);
    font-size: 0.75rem;
    color: var(--section-num);
    flex-shrink: 0;
    padding-top: 0.05em;
}

.toc a {
    color: var(--ink);
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: border-color 0.15s, color 0.15s;
}

.toc a:hover {
    color: var(--accent);
    border-bottom-color: var(--accent);
}

/* ── Sections ── */
.section {
    padding: 3rem 0;
    border-bottom: 1px solid var(--rule);
}

.section:last-of-type {
    border-bottom: none;
}

.section-header {
    display: flex;
    align-items: baseline;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.section-num {
    font-family: var(--font-family-header);
    font-size: 1.2rem;
    color: var(--section-num);
    flex-shrink: 0;
}

.section h2 {
    font-family: var(--font-family-header);
    font-size: 1.35rem;
    font-weight: 700;
    letter-spacing: 0.03em;
    line-height: 1.3;
}

.section h3 {
    font-family: var(--font-family-text);
    font-weight: 700;
    font-size: 0.95rem;
    letter-spacing: 0.03em;
    color: var(--accent);
    text-transform: uppercase;
    font-size: 0.9rem;
    letter-spacing: 0.12em;
    margin: 1.8rem 0 0.6rem;
}

.section h4 {
    font-family: var(--font-family-text);
    font-weight: 500;
    font-size: 0.8rem;
    /* letter-spacing: 0.01em; */
    /* color: var(--accent); */
    /* text-transform: uppercase; */
    font-size: 0.9rem;
    letter-spacing: 0.12em;
    margin: 1.8rem 0 0.6rem;
}


p { margin-bottom: 1rem; font-size: 0.95rem; color: #333; }
p:last-child { margin-bottom: 0; }

ul, ol {
    padding-left: 1.4rem;
    margin-bottom: 1rem;
}

li {
    font-size: 0.95rem;
    color: #333;
    margin-bottom: 0.35rem;
}

/* ── Data table ── */
.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.88rem;
    margin: 1.5rem 0;
}

.data-table th {
    background: var(--ink);
    color: #fff;
    font-family: 'DM Sans', sans-serif;
    font-weight: 500;
    font-size: 0.72rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    padding: 0.7rem 1rem;
    text-align: left;
}

.data-table td {
    padding: 0.7rem 1rem;
    border-bottom: 1px solid var(--rule);
    vertical-align: top;
    line-height: 1.5;
}

.data-table tr:nth-child(even) td {
    /* background: #f3f0ec; */
    background: #d9cbb92e;
}

/* ── Callout ── */
.callout {
    background: var(--accent-light);
    border-left: 3px solid var(--accent);
    padding: 1rem 1.4rem;
    margin: 1.5rem 0;
    font-size: 0.9rem;
    color: #2a4f70;
}

/* ── Footer ── */
footer {
    text-align: center;
    padding: 3rem 2rem;
    border-top: 1px solid var(--rule);
    font-size: 0.8rem;
    color: var(--ink-light);
}

footer strong { color: var(--ink); font-weight: 500; }

a { color: var(--accent); }

@media (max-width: 600px) {
    .wrap { padding: 0 1.2rem; }
    .toc { padding: 1.5rem; }
    .data-table { font-size: 0.8rem; }
    .data-table th, .data-table td { padding: 0.5rem 0.7rem; }
}