/* SSD AI Research */
:root {
  --ink: #0E1A2B;
  --ink-2: #1F2A37;
  --text: #2B3542;
  --mute: #4A5462;
  --ground: #F5F6F8;
  --surface: #FFFFFF;
  --soft: #E9EDF2;
  --head: #EEF1F5;
  --line: #DDE1E7;
  --line-2: #C5CCD6;
  --link: #1F4E8C;
  --accent: #4C9BE8;
  --nav-mute: #D5DCE6;

  --t1-fg: #FFFFFF; --t1-bg: #155E36;
  --t2-fg: #1D6B3F; --t2-bg: #E4F2E9;
  --t3-fg: #5E4B00; --t3-bg: #F6EDC8;
  --t4-fg: #9A3F08; --t4-bg: #FBE6D6;
  --t5-fg: #FFFFFF; --t5-bg: #9E2A1E;

  --serif: "Noto Serif SC", "Noto Serif JP", "Songti SC", serif;
  --sans: "Noto Sans SC", "Noto Sans JP", "PingFang SC", "Hiragino Sans", system-ui, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, Menlo, monospace;
  --wrap: 1200px;
}
html:lang(zh-Hant) { --serif: "Noto Serif TC", "Noto Serif SC", serif; --sans: "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", system-ui, sans-serif; }
html:lang(ja) { --serif: "Noto Serif JP", "Noto Serif SC", serif; --sans: "Noto Sans JP", "Noto Sans SC", "Hiragino Sans", system-ui, sans-serif; }

* { box-sizing: border-box; }
body { margin: 0; background: var(--ground); color: var(--ink); font-family: var(--sans); font-size: 16px; line-height: 1.6; -webkit-font-smoothing: antialiased; }
a { color: var(--link); text-decoration: none; }
a:hover { color: var(--ink); text-decoration: underline; }
img { max-width: 100%; height: auto; }
.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 24px; }
.mono { font-family: var(--mono); }
.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; }
.skip { position: absolute; left: -9999px; top: 0; background: #fff; color: var(--ink); padding: 10px 14px; z-index: 10; }
.skip:focus { left: 12px; top: 12px; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }

/* header */
.site-header { background: var(--ink); color: #fff; }
.site-header .wrap { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 8px 16px; min-height: 64px; }
.logo { display: flex; align-items: baseline; gap: 10px; color: #fff; }
.logo:hover { color: #fff; text-decoration: none; }
.logo b { font-family: var(--serif); font-size: 22px; letter-spacing: .5px; }
.logo span { font-family: var(--mono); font-size: 12px; letter-spacing: 2px; color: #AEB9C9; }
.main-nav { display: flex; flex-wrap: wrap; gap: 4px; font-size: 15px; }
.main-nav a { color: var(--nav-mute); padding: 12px 14px; border-bottom: 2px solid transparent; }
.main-nav a:hover { color: #fff; text-decoration: none; }
.main-nav a[aria-current="page"] { color: #fff; border-bottom-color: var(--accent); }
.tools { display: flex; align-items: center; gap: 2px; font-family: var(--mono); font-size: 13px; }
.tools a { color: var(--nav-mute); padding: 8px 10px; border-radius: 4px; }
.tools a:hover { color: #fff; text-decoration: none; }
.tools a[aria-current="true"] { color: var(--ink); background: #fff; }
.tools .search-icon { display: inline-flex; padding: 10px; margin-right: 6px; color: #fff; }

.market-strip { background: var(--surface); border-bottom: 1px solid var(--line); }
.market-strip .wrap { display: flex; flex-wrap: wrap; gap: 8px 28px; align-items: center; padding-top: 10px; padding-bottom: 10px; font-size: 13px; color: var(--mute); }
.market-strip b { color: var(--ink); }
.market-strip .label { font-family: var(--mono); color: var(--ink); font-weight: 500; }
.market-strip .date { margin-left: auto; font-family: var(--mono); }

main.page { padding: 40px 0 64px; }

/* tier badge */
.tier { display: inline-block; font-weight: 700; font-size: 13px; padding: 4px 10px; border-radius: 4px; white-space: nowrap; }
.tier.lg { font-size: 15px; padding: 6px 12px; }
.tier.xl { font-size: 22px; padding: 6px 14px; }
.tier-positive { color: var(--t1-fg); background: var(--t1-bg); }
.tier-mod_positive { color: var(--t2-fg); background: var(--t2-bg); }
.tier-neutral { color: var(--t3-fg); background: var(--t3-bg); }
.tier-mod_cautious { color: var(--t4-fg); background: var(--t4-bg); }
.tier-cautious { color: var(--t5-fg); background: var(--t5-bg); }
.tier-none { font-weight: 400; color: var(--mute); padding-left: 0; padding-right: 0; }

.ticker { font-family: var(--mono); font-weight: 500; background: var(--ink); color: #fff; padding: 4px 10px; border-radius: 4px; font-size: 15px; }

/* brand */
.brand { display: flex; flex-wrap: wrap; gap: 24px 48px; align-items: flex-end; justify-content: space-between; padding: 8px 0 36px; margin-bottom: 36px; border-bottom: 1px solid var(--line); }
.brand-text { flex: 1 1 440px; min-width: 0; display: flex; flex-direction: column; gap: 10px; }
.brand h1 { margin: 0; font-family: var(--serif); font-size: clamp(32px, 5vw, 44px); line-height: 1.15; letter-spacing: .5px; }
.brand p { margin: 0; font-size: 16px; line-height: 1.7; color: var(--text); }
.ssd { flex: 999 1 560px; min-width: 0; list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); gap: 12px; }
.ssd li { background: var(--surface); border: 1px solid var(--line); border-radius: 8px; padding: 18px 20px; display: flex; flex-direction: column; gap: 6px; }
.ssd .word { font-family: var(--mono); font-size: 22px; font-weight: 500; }
.ssd .word span { color: var(--link); font-size: 30px; }
.ssd .name { font-size: 15px; font-weight: 700; }
.ssd .desc { font-size: 13px; line-height: 1.7; color: var(--mute); }

.search-form { margin-top: 10px; display: flex; max-width: 520px; }
.search-form .field { position: relative; flex: 1 1 auto; min-width: 0; }
.search-form svg { position: absolute; left: 14px; top: 15px; }
.search-form input { width: 100%; font: inherit; font-size: 15px; padding: 13px 14px 13px 42px; min-height: 48px; border: 1px solid #A9B3C1; border-right: 0; border-radius: 6px 0 0 6px; background: var(--surface); color: var(--ink); }
.search-form button { white-space: nowrap; font: inherit; font-size: 15px; font-weight: 500; background: var(--ink); color: #fff; border: 1px solid var(--ink); border-radius: 0 6px 6px 0; padding: 0 20px; min-height: 48px; cursor: pointer; }
.popular { display: flex; flex-wrap: wrap; gap: 6px 12px; font-size: 13px; color: var(--mute); }

/* cards */
.row { display: flex; flex-wrap: wrap; gap: 32px; align-items: stretch; }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: 8px; }
.featured { flex: 999 1 560px; min-width: 0; padding: 36px 36px 32px; display: flex; flex-direction: column; gap: 20px; }
.kicker { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; font-size: 13px; color: var(--mute); }
.kicker .k { font-family: var(--mono); letter-spacing: 1.5px; color: var(--link); font-weight: 500; }
.featured .title-row { display: flex; flex-wrap: wrap; gap: 14px; align-items: baseline; }
.featured h2 { margin: 0; font-family: var(--serif); font-size: clamp(24px, 3.4vw, 34px); line-height: 1.3; }
.featured h2 a { color: var(--ink); }
.featured p { margin: 0; font-size: 17px; line-height: 1.8; color: var(--text); max-width: 46em; }
.scores { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: 6px; overflow: hidden; }
.scores > div { background: var(--surface); padding: 14px 16px; }
.scores .d { font-size: 12px; color: var(--mute); }
.scores .v { font-family: var(--mono); font-size: 18px; margin-top: 4px; }
@media (max-width: 560px) { .scores { grid-template-columns: repeat(2, minmax(0, 1fr)); } .featured { padding: 24px 20px; } }
.featured .foot { margin-top: auto; display: flex; flex-wrap: wrap; gap: 16px; align-items: center; justify-content: space-between; margin-top: 4px; }
.featured .foot .lbl { font-size: 13px; color: var(--mute); margin-right: 10px; }
.btn { display: inline-flex; align-items: center; gap: 8px; background: var(--ink); color: #fff; padding: 12px 20px; border-radius: 6px; font-weight: 500; font-size: 15px; min-height: 44px; }
.btn:hover { color: #fff; background: #1B2C45; text-decoration: none; }
.btn-ghost { display: inline-block; font-weight: 500; padding: 12px 20px; border: 1px solid var(--line-2); border-radius: 6px; background: var(--surface); color: var(--ink); }

.tiers { flex: 1 1 300px; min-width: 0; padding: 28px; display: flex; flex-direction: column; gap: 14px; }
.tiers h2 { margin: 0; font-family: var(--serif); font-size: 20px; }
.tiers p { margin: 0; font-size: 13px; line-height: 1.7; color: var(--mute); }
.tiers ul { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 8px; font-size: 14px; }
.tiers li { display: flex; align-items: center; gap: 12px; color: var(--text); }
.tiers li .tier { min-width: 76px; text-align: center; font-size: 14px; }
.tiers .note { border-top: 1px solid var(--line); padding-top: 12px; font-size: 12px; }

/* report list */
.list-head { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: 12px; border-bottom: 2px solid var(--ink); padding-bottom: 12px; }
.list-head h2, .list-head h1 { margin: 0; font-family: var(--serif); font-size: 24px; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; font-size: 14px; }
.chips button { font: inherit; background: var(--surface); color: var(--ink); border: 1px solid var(--line-2); border-radius: 999px; padding: 8px 16px; min-height: 40px; cursor: pointer; }
.chips button[aria-pressed="true"] { background: var(--ink); color: #fff; border-color: var(--ink); }
.table-box { overflow-x: auto; }
table.reports { width: 100%; min-width: 760px; border-collapse: collapse; font-size: 15px; }
table.reports th { text-align: left; color: var(--mute); font-size: 13px; font-weight: 500; padding: 14px 12px 10px; }
table.reports td { padding: 16px 12px; border-top: 1px solid var(--line); vertical-align: middle; }
table.reports th:first-child, table.reports td:first-child { padding-left: 0; }
table.reports th:last-child, table.reports td:last-child { padding-right: 0; text-align: right; }
table.reports .date { font-family: var(--mono); font-size: 14px; color: var(--mute); white-space: nowrap; }
table.reports .tk { font-family: var(--mono); font-weight: 500; }
table.reports .ttl a { color: var(--ink); font-weight: 500; }
table.reports .typ { color: var(--mute); white-space: nowrap; }
.empty { margin: 0; padding: 28px 0; text-align: center; color: var(--mute); border-top: 1px solid var(--line); }
.center { margin-top: 20px; text-align: center; }

.method { margin-top: 56px; background: var(--soft); border-radius: 8px; padding: 32px; }
.method h2 { margin: 0 0 20px; font-family: var(--serif); font-size: 22px; }
.method .grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 24px; }
.method .grid div { display: flex; flex-direction: column; gap: 6px; }
.method .n { font-family: var(--mono); font-size: 13px; color: var(--link); font-weight: 500; }
.method p { margin: 0; font-size: 14px; line-height: 1.8; color: var(--text); }
.method .more { display: inline-block; margin-top: 20px; font-size: 14px; font-weight: 500; }

/* report page */
.report-head { background: var(--surface); border-bottom: 1px solid var(--line); }
.report-head .wrap { padding-top: 32px; padding-bottom: 28px; display: flex; flex-wrap: wrap; gap: 28px; justify-content: space-between; align-items: flex-end; }
.report-head .left { flex: 999 1 560px; min-width: 0; display: flex; flex-direction: column; gap: 14px; }
.crumbs { font-size: 13px; color: var(--mute); }
.report-head .idrow { display: flex; flex-wrap: wrap; gap: 14px; align-items: center; }
.report-head .idrow .co { font-size: 15px; color: var(--mute); }
.report-head h1 { margin: 0; font-family: var(--serif); font-size: clamp(28px, 4vw, 38px); line-height: 1.3; }
.meta { display: flex; flex-wrap: wrap; gap: 8px 24px; font-size: 14px; color: var(--mute); }
.langs { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 4px; }
.langs a { font-size: 14px; color: var(--ink); border: 1px solid var(--line-2); padding: 8px 14px; border-radius: 999px; }
.langs a[aria-current="true"] { color: #fff; background: var(--ink); border-color: var(--ink); }
.rating { flex: 1 1 300px; min-width: 0; border: 1px solid var(--line); border-radius: 8px; padding: 22px 24px; display: flex; flex-direction: column; gap: 12px; background: #F9FAFB; }
.rating .lbl { font-size: 13px; color: var(--mute); }
.rating .line { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; }
.rating .s { font-family: var(--mono); font-size: 14px; color: var(--mute); }
.scale { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 4px; }
.scale i { height: 6px; background: #E3E7EC; border-radius: 3px; }
.scale i.on.tier-positive { background: var(--t1-bg); }
.scale i.on.tier-mod_positive { background: var(--t2-fg); }
.scale i.on.tier-neutral { background: #B08F00; }
.scale i.on.tier-mod_cautious { background: var(--t4-fg); }
.scale i.on.tier-cautious { background: var(--t5-bg); }
.scale-lbl { display: flex; justify-content: space-between; font-size: 11px; color: var(--mute); }
.rating p { margin: 0; font-size: 12px; line-height: 1.7; color: var(--mute); }

.report-body { display: flex; flex-wrap: wrap; gap: 40px; align-items: flex-start; }
.toc { flex: 1 1 220px; min-width: 0; font-size: 14px; }
@media (max-width: 900px) { .toc { display: none; } }
.toc .h { font-family: var(--mono); font-size: 12px; letter-spacing: 1.5px; color: var(--mute); margin-bottom: 8px; }
.toc ul { list-style: none; margin: 0; padding: 0; }
.toc li a { display: block; color: var(--mute); padding: 7px 0 7px 12px; border-left: 2px solid var(--line); }
.toc li a:hover { color: var(--ink); border-left-color: var(--ink); text-decoration: none; }
.prose { flex: 999 1 640px; min-width: 0; max-width: 780px; font-size: 17px; line-height: 1.9; color: var(--ink-2); }
.prose h2 { font-family: var(--serif); font-size: 26px; line-height: 1.4; margin: 44px 0 16px; color: var(--ink); scroll-margin-top: 16px; }
.prose h2:first-child { margin-top: 0; }
.prose h3 { font-size: 18px; margin: 28px 0 10px; color: var(--ink); }
.prose p { margin: 0 0 16px; }
.prose ul, .prose ol { padding-left: 22px; margin: 0 0 16px; }
.prose li { margin: 4px 0; }
.prose blockquote { margin: 16px 0; background: var(--head); border-radius: 6px; padding: 14px 18px; font-size: 15px; color: var(--text); }
.prose blockquote p:last-child { margin: 0; }
.prose code { font-family: var(--mono); font-size: .9em; background: var(--head); padding: 1px 5px; border-radius: 4px; }
.prose pre { background: var(--surface); border: 1px solid var(--line); border-radius: 6px; padding: 12px 16px; overflow-x: auto; font-size: 15px; line-height: 1.7; }
.prose pre code { background: none; padding: 0; }
.prose .tbl { overflow-x: auto; margin: 0 0 20px; }
.prose table { width: 100%; border-collapse: collapse; font-size: 15px; background: var(--surface); border: 1px solid var(--line); line-height: 1.6; }
.prose th { background: var(--head); text-align: left; font-weight: 500; padding: 10px 14px; }
.prose td { padding: 10px 14px; border-top: 1px solid var(--line); }
.prose hr { border: 0; border-top: 1px solid var(--line); margin: 32px 0; }
.callout { background: var(--head); border-radius: 6px; padding: 16px 18px; font-size: 14px; line-height: 1.8; color: var(--text); margin-top: 28px; }
.report-foot { margin-top: 48px; border-top: 1px solid var(--line); padding-top: 20px; display: flex; flex-wrap: wrap; gap: 12px; justify-content: space-between; font-size: 14px; color: var(--mute); }

/* simple pages */
.page-head { margin-bottom: 28px; }
.page-head h1 { margin: 0; font-family: var(--serif); font-size: clamp(28px, 4vw, 36px); }
.narrow { max-width: 820px; }

/* search page */
.pagefind-ui { --pagefind-ui-scale: 0.9; --pagefind-ui-primary: #0E1A2B; --pagefind-ui-text: #0E1A2B; --pagefind-ui-background: #FFFFFF; --pagefind-ui-border: #A9B3C1; --pagefind-ui-tag: #EEF1F5; --pagefind-ui-border-width: 1px; --pagefind-ui-border-radius: 6px; --pagefind-ui-font: var(--sans); }
.pagefind-ui__result-link { color: var(--ink) !important; }
.pagefind-ui mark { background: #FFE9A8; color: inherit; }

/* footer */
.site-footer { background: var(--ink); color: #C9D2DE; }
.site-footer .wrap { padding-top: 36px; padding-bottom: 36px; display: flex; flex-direction: column; gap: 14px; font-size: 13px; line-height: 1.8; }
.site-footer p { margin: 0; max-width: 60em; }
.site-footer .brandline { font-family: var(--mono); letter-spacing: 1px; color: #fff; }
.site-footer .t { color: #fff; font-weight: 500; }
.site-footer .links { display: flex; flex-wrap: wrap; gap: 8px 24px; border-top: 1px solid #2C3A4F; padding-top: 14px; }
.site-footer a { color: #C9D2DE; }
.site-footer a:hover { color: #fff; }

/* keep footer at the bottom on short pages */
body { display: flex; flex-direction: column; min-height: 100vh; }
#content { flex: 1 0 auto; }