:root {
    --bg: #fcfcfa;
    --surface: #fff;
    --ink: #1a1a1a;
    --ink-2: #343434;
    --ink-3: #5f5f5f;
    --rule: #c8c1b3;
    --rule-light: #e2ddd3;
    --green: #2f3e2a;
    --green-dark: #1f2a1b;
    --cream: #f3ebdb;
    --focus: #2f3e2a;
    --focus-light: rgba(47, 62, 42, .065);
    --ui: "Noto Sans JP", "Yu Gothic", "Hiragino Kaku Gothic ProN", sans-serif;
    --mono: var(--ui);
    --serif-en: "Libre Baskerville", Georgia, serif;
    --serif-jp: "Noto Serif JP", "Yu Mincho", YuMincho, "Hiragino Mincho ProN", "Hiragino Mincho Pro", "MS PMincho", serif;
}

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

html { scroll-behavior: smooth; scroll-padding-top: 82px; }

body {
    margin: 0;
    background: var(--bg);
    color: var(--ink);
    font-family: var(--serif-jp);
    font-size: 15px;
    line-height: 1.85;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}

button, input, select { font: inherit; }

button, a { -webkit-tap-highlight-color: transparent; }

a { color: inherit; }

.site-header {
    position: sticky;
    z-index: 100;
    top: 0;
    color: var(--cream);
    background: var(--green);
    border-bottom: 1px solid var(--green-dark);
}

.site-header-inner {
    width: min(1400px, 100%);
    min-height: 60px;
    margin: 0 auto;
    padding: 10px 48px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}

.site-header-left,
.language-switch {
    display: flex;
    align-items: center;
}

.site-header-left { gap: 18px; }

.institute-name {
    padding-right: 17px;
    border-right: 1px solid rgba(243, 235, 219, .3);
    color: var(--cream);
    font-family: var(--serif-en);
    font-size: 16px;
    font-weight: 400;
    letter-spacing: 3px;
    line-height: 1;
    text-decoration: none;
}

.back-link {
    color: rgba(243, 235, 219, .72);
    font-family: var(--mono);
    font-size: 11px;
    letter-spacing: .2px;
    text-decoration: none;
}

.back-link:hover { color: var(--cream); }

.hero-tools {
    min-height: 35px;
    display: flex;
    justify-content: flex-end;
}

.language-switch {
    padding: 2px;
    border: 1px solid var(--rule);
}

.language-btn {
    min-width: 64px;
    padding: 4px 9px;
    border: 0;
    color: var(--ink-3);
    background: transparent;
    cursor: pointer;
    font-family: var(--mono);
    font-size: 12px;
    letter-spacing: 0;
}

.language-btn.active {
    color: #fff;
    background: var(--ink);
}

.hero {
    width: min(1160px, calc(100% - 64px));
    margin: 0 auto;
    padding: 72px 0 56px;
    border-bottom: 1px solid var(--rule);
}

.scope-label {
    color: var(--ink);
    font-size: 13px;
    font-weight: 600;
}

.hero h1 {
    max-width: 900px;
    margin: 4px 0 16px;
    font-family: var(--serif-en);
    font-size: clamp(32px, 4vw, 48px);
    font-weight: 400;
    letter-spacing: -1.4px;
    line-height: 1.05;
}

.hero-lead {
    max-width: 730px;
    margin: 0;
    color: var(--ink-2);
    font-size: 16px;
    line-height: 1.95;
}

.hero-meta {
    display: grid;
    grid-template-columns: repeat(3, minmax(110px, 150px)) 1fr;
    margin-top: 34px;
    border-top: 1px solid var(--ink);
    border-bottom: 1px solid var(--ink);
}

.hero-stat,
.hero-version {
    min-height: 78px;
    padding: 14px 18px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.hero-stat { border-right: 1px solid var(--rule); }

.hero-stat strong {
    font-family: var(--mono);
    font-size: 25px;
    font-weight: 400;
    letter-spacing: -1px;
    line-height: 1.2;
}

.hero-stat span,
.hero-version span {
    color: var(--ink-3);
    font-family: var(--mono);
    font-size: 11px;
    letter-spacing: 0;
}

.hero-version {
    align-items: flex-end;
    text-align: right;
}

.hero-version strong {
    font-family: var(--mono);
    font-size: 15px;
    font-weight: 500;
    letter-spacing: .5px;
}

.hero-actions {
    margin-top: 24px;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
}

.hero-actions .button {
    min-height: 64px;
    padding: 14px 24px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--ink);
    background: transparent;
    font-family: var(--mono);
    font-size: 17px;
    font-weight: 600;
    letter-spacing: 0;
    text-decoration: none;
}

.hero-actions .button:hover { background: #f0eee8; }

.button-primary {
    color: #fff;
    background: var(--ink);
}

.button-primary:hover { background: var(--green); }

.hero-actions .view-link.active {
    color: #fff;
    background: var(--ink);
}

.hero-actions .view-link.active:hover { background: var(--green); }

.page-view[hidden] { display: none !important; }

.scope-section {
    width: min(1160px, calc(100% - 64px));
    margin: 0 auto;
    padding: 30px 0;
    display: grid;
    grid-template-columns: 1.1fr .9fr;
    gap: 56px;
    border-bottom: 1px solid var(--rule);
}

.scope-section p {
    margin: 5px 0 0;
    color: var(--ink-2);
    font-size: 15px;
    line-height: 1.9;
}

.disclosure-notice {
    width: min(1160px, calc(100% - 64px));
    margin: 0 auto;
    padding: 28px 0 31px;
    display: grid;
    grid-template-columns: 270px minmax(0, 1fr);
    gap: 42px;
    border-bottom: 1px solid var(--rule);
}

.disclosure-notice h2 {
    margin: 2px 0 0;
    font-size: 15px;
    font-weight: 600;
    line-height: 1.7;
}

.disclosure-notice p {
    margin: 0;
    color: var(--ink-2);
    font-size: 14px;
    line-height: 1.95;
}

.taxonomy-dialog-open {
    min-height: 48px;
    align-self: start;
    padding: 10px 16px;
    border: 1px solid var(--ink);
    color: var(--ink);
    background: transparent;
    cursor: pointer;
    font-family: var(--ui);
    font-size: 13px;
    font-weight: 500;
    letter-spacing: 0;
    text-align: left;
}

.taxonomy-dialog-open:hover { color: #fff; background: var(--ink); }

.taxonomy-dialog {
    width: min(860px, calc(100% - 40px));
    max-height: min(760px, calc(100vh - 48px));
    padding: 0;
    border: 1px solid var(--ink);
    color: var(--ink);
    background: var(--surface);
}

.taxonomy-dialog::backdrop { background: rgba(20, 20, 18, .62); }

.taxonomy-dialog-panel { padding: 28px; }

.taxonomy-dialog-header {
    margin-bottom: 18px;
    padding-bottom: 14px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    border-bottom: 1px solid var(--ink);
}

.taxonomy-dialog-header h2 { margin: 0; font-size: 24px; font-weight: 500; }

.taxonomy-dialog-header button {
    min-height: 38px;
    padding: 7px 14px;
    border: 1px solid var(--ink);
    background: transparent;
    cursor: pointer;
    font-family: var(--ui);
    font-size: 12px;
}

.taxonomy-dialog-header button:hover { color: #fff; background: var(--ink); }

.taxonomy-definitions {
    padding: 0 0 12px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0 18px;
}

.taxonomy-definition {
    padding: 9px 0;
    border-top: 1px solid var(--rule-light);
}

.taxonomy-definition dt {
    font-family: var(--mono);
    font-size: 12px;
    font-weight: 600;
}

.taxonomy-definition dd {
    margin: 2px 0 0;
    color: var(--ink-3);
    font-size: 13px;
    line-height: 1.7;
}

.database-section {
    width: min(1160px, calc(100% - 64px));
    margin: 0 auto;
    padding: 58px 0 88px;
}

.database-heading {
    margin-bottom: 22px;
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 24px;
}

.database-heading h2 {
    margin: 5px 0 0;
    font-size: 28px;
    font-weight: 500;
    letter-spacing: .2px;
    line-height: 1.4;
}

.language-note {
    max-width: 340px;
    margin: 0 0 5px;
    color: var(--ink-3);
    font-family: var(--mono);
    font-size: 12px;
    line-height: 1.6;
    text-align: right;
}

.filter-panel {
    padding: 24px;
    border: 1px solid var(--ink);
    background: var(--surface);
}

.search-row {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 10px;
}

.search-box {
    min-height: 48px;
    padding: 0 15px;
    display: flex;
    align-items: center;
    gap: 11px;
    border: 1px solid var(--ink);
    background: var(--bg);
}

.search-box:focus-within {
    outline: 2px solid var(--green);
    outline-offset: 2px;
}

.search-box svg {
    width: 17px;
    flex: 0 0 auto;
    fill: none;
    stroke: var(--ink);
    stroke-linecap: round;
    stroke-width: 1.5;
}

.search-box input {
    width: 100%;
    border: 0;
    outline: 0;
    background: transparent;
    font-family: var(--serif-jp);
    font-size: 16px;
}

.search-box input::placeholder { color: #8a8a86; }

.clear-button {
    padding: 0 17px;
    border: 1px solid var(--rule);
    color: var(--ink-3);
    background: transparent;
    cursor: pointer;
    font-family: var(--mono);
    font-size: 12px;
    letter-spacing: 0;
}

.clear-button:hover { border-color: var(--ink); color: var(--ink); }

.filter-group {
    min-width: 0;
    margin: 21px 0 0;
    padding: 0;
    border: 0;
}

.filter-group legend,
.select-row label > span {
    margin-bottom: 7px;
    display: flex;
    align-items: baseline;
    gap: 10px;
    color: var(--ink-3);
    font-family: var(--mono);
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0;
}

.filter-group legend small {
    color: #878780;
    font-size: 11px;
    font-weight: 400;
    letter-spacing: 0;
    text-transform: none;
}

.segmented-control,
.type-filters {
    display: flex;
    flex-wrap: wrap;
    gap: 5px 18px;
}

.segment,
.type-filter {
    min-height: 34px;
    padding: 5px 0 3px;
    border: 0;
    border-bottom: 1px solid transparent;
    color: var(--ink-2);
    background: transparent;
    cursor: pointer;
    font-family: var(--mono);
    font-size: 13px;
    letter-spacing: 0;
}

.segment:hover,
.type-filter:hover { border-bottom-color: var(--ink); }

.segment.active,
.type-filter.active {
    border-bottom-color: var(--ink);
    color: var(--ink);
    background: transparent;
    font-weight: 600;
}

.type-filter.active { color: var(--green); border-bottom-color: var(--green); }

.segment[data-region="japan"].active { color: #315f82; border-bottom-color: #315f82; }
.segment[data-region="international"].active { color: #7a552c; border-bottom-color: #7a552c; }

.select-row {
    margin-top: 21px;
    display: grid;
    grid-template-columns: 1fr 220px;
    gap: 14px;
}

.select-row label { min-width: 0; }

.select-row select {
    width: 100%;
    min-height: 40px;
    padding: 7px 34px 7px 11px;
    border: 1px solid var(--rule);
    border-radius: 0;
    color: var(--ink);
    background: var(--bg);
    font-size: 14px;
}

.results-bar {
    min-height: 59px;
    padding: 13px 2px 11px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    border-bottom: 1px solid var(--ink);
}

.results-bar p { margin: 0; }

.results-bar strong {
    font-family: var(--mono);
    font-size: 20px;
    font-weight: 500;
}

.results-bar span {
    margin-left: 3px;
    color: var(--ink-3);
    font-size: 12px;
}

.result-total { font-family: var(--mono); }

.result-help {
    color: var(--ink-3);
    font-family: var(--mono);
    font-size: 12px;
    letter-spacing: 0;
}

.case-list { border-bottom: 1px solid var(--ink); }

.case-item {
    position: relative;
    scroll-margin-top: 78px;
    border-top: 1px solid var(--rule-light);
    background: transparent;
    transition: background .16s ease;
}

.case-item.region-japan { border-left: 4px solid #6f94af; padding-left: 14px; }
.case-item.region-international { border-left: 4px solid #ad8a61; padding-left: 14px; }

.case-item:first-child { border-top: 0; }

.case-item:target,
.case-item.hash-target { background: var(--focus-light); }

.case-item details { padding: 0 2px; }

.case-item summary {
    min-height: 94px;
    padding: 19px 44px 19px 0;
    display: grid;
    grid-template-columns: 80px minmax(0, 1fr) 235px;
    align-items: center;
    gap: 20px;
    cursor: pointer;
    list-style: none;
}

.case-item summary::-webkit-details-marker { display: none; }

.case-id {
    color: var(--green);
    font-family: var(--mono);
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0;
}

.region-japan .case-id { color: #315f82; }
.region-international .case-id { color: #7a552c; }

.case-title-wrap { min-width: 0; }

.case-title {
    margin: 0;
    font-size: 17px;
    font-weight: 600;
    line-height: 1.65;
}

.case-period {
    margin-top: 2px;
    color: var(--ink-3);
    font-family: var(--mono);
    font-size: 12px;
    line-height: 1.5;
}

.case-tags {
    display: flex;
    flex-wrap: wrap;
    justify-content: flex-end;
    gap: 0;
    color: var(--ink-3);
    font-family: var(--ui);
    font-size: 12px;
}

.case-tag {
    padding: 0;
    border: 0;
    color: var(--ink-2);
    background: transparent;
    font-family: var(--ui);
    font-size: 12px;
    font-weight: 500;
    line-height: 1.8;
}

.case-tag + .case-tag::before {
    content: "·";
    margin: 0 7px;
    color: #99958d;
}

.companion-database-page .case-tags { gap: 7px 16px; }

.companion-database-page .case-tag + .case-tag::before { content: none; }

.case-tag.region-japan-tag { color: #315f82; }
.case-tag.region-international-tag { color: #7a552c; }

.summary-mark {
    position: absolute;
    top: 35px;
    right: 2px;
    width: 20px;
    height: 20px;
}

.summary-mark::before,
.summary-mark::after {
    content: "";
    position: absolute;
    top: 9px;
    left: 3px;
    width: 14px;
    height: 1px;
    background: var(--ink);
}

.summary-mark::after { transform: rotate(90deg); transition: transform .15s ease; }

.case-item details[open] .summary-mark::after { transform: rotate(0); }

.case-body {
    padding: 2px 0 25px 100px;
    display: grid;
    grid-template-columns: minmax(0, 1.25fr) minmax(250px, .75fr);
    gap: 22px 44px;
}

.case-overview {
    color: var(--ink-2);
    font-size: 15px;
    line-height: 2;
}

.case-overview p { margin: 5px 0 0; }

.case-facts {
    display: grid;
    align-content: start;
    border-top: 1px solid var(--ink);
}

.case-fact {
    padding: 8px 0;
    display: grid;
    grid-template-columns: 62px 1fr;
    gap: 11px;
    border-bottom: 1px solid var(--rule-light);
}

.case-fact dt,
.body-label {
    color: var(--ink-3);
    font-family: var(--mono);
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0;
}

.case-fact dd {
    margin: 0;
    color: var(--ink-2);
    font-size: 13px;
    line-height: 1.7;
    overflow-wrap: anywhere;
}

.case-source {
    grid-column: 1 / -1;
    padding-top: 13px;
    border-top: 1px solid var(--rule-light);
}

.case-source p {
    margin: 4px 0 0;
    color: var(--ink-3);
    font-size: 13px;
    line-height: 1.8;
    overflow-wrap: anywhere;
}

.case-source a { color: var(--green); }

.empty-state {
    padding: 64px 20px;
    border-bottom: 1px solid var(--ink);
    text-align: center;
}

.empty-state strong,
.empty-state span { display: block; }

.empty-state span {
    margin-top: 5px;
    color: var(--ink-3);
    font-size: 12px;
}

.findings-section {
    width: min(1160px, calc(100% - 64px));
    margin: 0 auto;
    padding: 64px 0 88px;
}

.findings-section .disclosure-notice {
    width: 100%;
    margin: 0 0 52px;
    padding-top: 0;
}

.findings-heading {
    margin-bottom: 28px;
    padding-bottom: 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    border-bottom: 1px solid var(--ink);
}

.findings-heading h2 {
    margin: 0;
    font-size: 32px;
    font-weight: 500;
}

.findings-back {
    color: var(--ink-2);
    font-family: var(--ui);
    font-size: 13px;
    font-weight: 500;
    text-decoration: none;
    border-bottom: 1px solid var(--ink-3);
}

.findings-back:hover { color: var(--green); border-bottom-color: var(--green); }

.findings-list { max-width: 940px; }

.finding-item {
    padding: 28px 0 30px;
    border-top: 1px solid var(--rule);
}

.finding-item:first-child { border-top: 0; }

.finding-item h3 {
    margin: 0 0 14px;
    font-size: 21px;
    font-weight: 600;
    line-height: 1.65;
}

.finding-item p {
    margin: 0 0 14px;
    color: var(--ink-2);
    font-size: 15px;
    line-height: 2;
}

.finding-item p:last-child { margin-bottom: 0; }
.finding-item a { color: var(--green); overflow-wrap: anywhere; }

.information-note {
    width: min(100% - 64px, 1160px);
    margin: 64px auto;
    padding-top: 24px;
    border-top: 1px solid var(--rule);
}

.information-note h2 {
    margin: 0 0 10px;
    font-size: 17px;
    font-weight: 600;
}

.information-note p {
    max-width: 900px;
    margin: 0;
    color: var(--ink-3);
    font-size: 13px;
    line-height: 1.9;
}

.site-footer {
    padding: 32px;
    color: rgba(255, 255, 255, .4);
    background: var(--ink);
    font-family: var(--serif-jp);
    font-size: 15px;
    letter-spacing: 1px;
    line-height: 2.2;
    text-align: center;
}

.site-footer a { color: rgba(255, 255, 255, .6); text-decoration: none; }
.site-footer a:hover { color: #fff; }
.site-footer span { opacity: .5; }

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

@media (max-width: 820px) {
    .site-header-inner { padding: 10px 22px; }
    .hero,
    .scope-section,
    .disclosure-notice,
    .database-section,
    .findings-section,
    .information-note { width: min(100% - 40px, 1160px); }
    .hero { padding: 51px 0 42px; }
    .hero h1 { letter-spacing: -1.8px; }
    .hero-meta { grid-template-columns: repeat(3, 1fr); }
    .hero-version { grid-column: 1 / -1; min-height: 54px; align-items: flex-start; border-top: 1px solid var(--rule); text-align: left; }
    .scope-section { grid-template-columns: 1fr; gap: 25px; }
    .disclosure-notice { grid-template-columns: 1fr; gap: 9px; }
    .database-section { padding-top: 44px; }
    .case-item summary { grid-template-columns: 66px 1fr; gap: 10px; }
    .case-tags { grid-column: 2; justify-content: flex-start; }
    .case-body { padding-left: 76px; grid-template-columns: 1fr; gap: 18px; }
    .case-source { grid-column: auto; }
}

@media (max-width: 580px) {
    body { font-size: 16px; }
    .site-header-inner { min-height: 56px; padding: 9px 14px; }
    .site-header-left { gap: 10px; }
    .institute-name { padding-right: 10px; font-size: 12px; letter-spacing: .8px; }
    .back-link { font-size: 9px; letter-spacing: 0; }
    .language-btn { min-width: 58px; padding: 6px 8px; font-size: 11px; }
    .hero,
    .scope-section,
    .disclosure-notice,
    .database-section,
    .findings-section,
    .information-note { width: min(100% - 28px, 1160px); }
    .hero { padding-top: 38px; }
    .hero h1 { margin-top: 9px; font-size: 31px; letter-spacing: -.7px; }
    .hero-lead { font-size: 16px; }
    .hero-meta { margin-top: 25px; }
    .hero-stat { min-height: 68px; padding: 11px 9px; }
    .hero-stat strong { font-size: 21px; }
    .hero-stat span { font-size: 10px; letter-spacing: 0; }
    .hero-actions { gap: 8px; }
    .hero-actions .button { min-height: 56px; padding: 11px 8px; font-size: 15px; }
    .taxonomy-definitions { grid-template-columns: 1fr; }
    .taxonomy-dialog { width: calc(100% - 20px); max-height: calc(100vh - 20px); }
    .taxonomy-dialog-panel { padding: 18px; }
    .database-heading { align-items: flex-start; flex-direction: column; gap: 8px; }
    .language-note { text-align: left; }
    .database-heading h2 { font-size: 23px; }
    .filter-panel { padding: 15px; }
    .search-row { grid-template-columns: 1fr; }
    .search-box { min-height: 45px; }
    .clear-button { min-height: 37px; }
    .select-row { grid-template-columns: 1fr; }
    .results-bar { align-items: flex-end; }
    .result-help { max-width: 180px; text-align: right; }
    .case-item summary { min-height: 0; padding: 16px 34px 16px 0; grid-template-columns: 1fr; gap: 4px; }
    .case-id { font-size: 13px; }
    .case-title { font-size: 16px; }
    .case-tags { grid-column: 1; margin-top: 7px; }
    .summary-mark { top: 27px; }
    .case-body { padding: 0 0 22px; grid-template-columns: 1fr; }
    .case-fact { grid-template-columns: 55px 1fr; }
    .findings-section { padding: 50px 0 64px; }
    .findings-heading { align-items: flex-start; flex-direction: column; gap: 8px; }
    .findings-heading h2 { font-size: 28px; }
    .finding-item h3 { font-size: 19px; }
    .finding-item p { font-size: 16px; }
    .site-footer { padding: 26px 16px; font-size: 13px; }
}

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    *, *::before, *::after { transition: none !important; }
}