:root {
    color-scheme: light;
    --bg: #f5f4ef;
    --panel: #ffffff;
    --ink: #111111;
    --muted: #5a5a5a;
    --line: #111111;
    --soft-line: rgba(17, 17, 17, 0.18);
    --shadow: 12px 12px 0 #111111;
    --mono: -apple-system, BlinkMacSystemFont, "Roboto Mono", "BIZ UD Gothic", monospace;
    --max: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    background: var(--bg);
    color: var(--ink);
    font-family: var(--mono);
    line-height: 1.6;
}
a { color: inherit; }
.page {
    width: min(calc(100% - 32px), var(--max));
    margin: 0 auto;
    padding: 24px 0 56px;
}
.topbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    padding: 8px 0 24px;
}
.brandline {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    font-size: 0.92rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}
.brandmark {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 42px;
    height: 42px;
    border: 2px solid var(--line);
    background: var(--panel);
    font-weight: 700;
}
.control-row {
    display: inline-flex;
    flex-wrap: wrap;
    gap: 8px;
}
.control-group {
    display: inline-flex;
    gap: 8px;
    border: 2px solid var(--line);
    padding: 4px;
    background: var(--panel);
}
.control-button {
    appearance: none;
    border: 0;
    background: transparent;
    color: var(--ink);
    font: inherit;
    padding: 8px 12px;
    cursor: pointer;
    text-transform: uppercase;
}
.control-button.is-active { background: var(--ink); color: var(--panel); }
.hero {
    display: grid;
    grid-template-columns: minmax(0, 2fr) minmax(280px, 1fr);
    gap: 18px;
    align-items: stretch;
    margin-bottom: 18px;
}
.panel {
    background: var(--panel);
    border: 2px solid var(--line);
    box-shadow: var(--shadow);
}
.hero-copy {
    padding: 28px;
    min-height: 420px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}
.eyebrow, .kicker {
    font-size: 0.82rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--muted);
}
.hero-title {
    margin: 12px 0 18px;
    font-size: clamp(2.4rem, 7vw, 5.6rem);
    line-height: 0.92;
    letter-spacing: -0.04em;
    text-transform: uppercase;
}
.lead { max-width: 48rem; font-size: clamp(1.02rem, 1.7vw, 1.2rem); }
.hero-notes { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 24px; }
.note-chip, .route-tag {
    border: 1px solid var(--line);
    padding: 5px 10px;
    font-size: 0.82rem;
    background: var(--panel);
}
.hero-side { display: grid; gap: 18px; }
.side-card {
    padding: 22px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    gap: 18px;
}
.section { padding: 30px 0; border-top: 2px solid var(--line); }
.section-title {
    margin: 0 0 16px;
    font-size: clamp(1.5rem, 2.8vw, 2.2rem);
    line-height: 1.05;
    text-transform: uppercase;
}
.portal-grid, .summary-grid, .reference-grid, .cli-grid {
    display: grid;
    gap: 18px;
}
.portal-grid { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.summary-grid, .reference-grid, .cli-grid { grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
.portal-card, .rule-card, .reference-card, .cli-card { padding: 22px; }
.card-title { margin: 0 0 10px; font-size: 1.2rem; line-height: 1.1; }
.card-copy, .small, .footnote { color: var(--muted); }
.cta-row { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 18px; }
.button-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 14px;
    border: 2px solid var(--line);
    background: var(--ink);
    color: var(--panel);
    text-decoration: none;
    font-size: 0.92rem;
}
.button-link.secondary { background: var(--panel); color: var(--ink); }
.table-wrap {
    overflow-x: auto;
    border: 2px solid var(--line);
    background: var(--panel);
    box-shadow: var(--shadow);
}
.compare-table { width: 100%; border-collapse: collapse; min-width: 860px; }
.compare-table th, .compare-table td {
    padding: 14px;
    border-bottom: 1px solid var(--soft-line);
    vertical-align: top;
    text-align: left;
}
.compare-table th {
    font-size: 0.84rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    background: rgba(17, 17, 17, 0.05);
}
.compare-table tr:last-child td { border-bottom: 0; }
.footer {
    border-top: 2px solid var(--line);
    padding: 28px 0 12px;
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    gap: 16px;
    flex-wrap: wrap;
}
.footer p { margin: 0; }
[data-lang] { display: none; }
html[data-ui-lang='ja'] [data-lang='ja'], html[data-ui-lang='en'] [data-lang='en'] { display: block; }
html[data-ui-lang='ja'] tr[data-lang='ja'], html[data-ui-lang='en'] tr[data-lang='en'] { display: table-row; }
@media (max-width: 880px) {
    .hero { grid-template-columns: 1fr; }
    .hero-copy { min-height: auto; }
    .topbar, .footer { align-items: flex-start; flex-direction: column; }
}
html[data-theme='dark'] {
    color-scheme: dark;
    --bg: #0f0f0c;
    --panel: #161613;
    --ink: #f5f4ef;
    --muted: #b7b4ad;
    --line: #f5f4ef;
    --soft-line: rgba(245, 244, 239, 0.16);
    --shadow: 12px 12px 0 #000000;
}
html[data-theme='dark'] .compare-table th { background: rgba(255, 255, 255, 0.04); }