/* ==========================================================================
   RepoRepairGym — editorial design system
   "The repair ledger": high-contrast magazine treatment — oversized Fraunces
   display, numbered sections, dark full-bleed hairlines, one electric accent
   (cobalt), with PASS/FAIL reserved as verdict semantics. Light + dark.
   ========================================================================== */

/* ------------------------------- tokens: light ------------------------------- */
:root{
  --paper:#EBEEF3; --paper-2:#E3E7EE;
  --surface:#FFFFFF; --panel:#F3F5F9; --panel-2:#E9EDF3;
  --ink:#080B12; --ink-2:#3E4655; --ink-3:#7B8494;
  --line:rgba(8,11,18,.12); --line-2:rgba(8,11,18,.22);
  --rule:rgba(8,11,18,.90);              /* the dark editorial hairline */
  --accent:#2F45E0; --accent-ink:#2233C0; --accent-soft:rgba(47,69,224,.10); --accent-line:rgba(47,69,224,.28);
  --on-accent:#FFFFFF;
  --pass:#0E844F; --pass-soft:rgba(14,132,79,.12);
  --fail:#CE3A2C; --fail-soft:rgba(206,58,44,.10);
  --warn:#8A5B00; --warn-soft:rgba(138,91,0,.14);
  --wash:rgba(47,69,224,.05);
  --bar-track:rgba(8,11,18,.08);
  --r-xs:8px; --r-sm:12px; --r:16px; --r-lg:22px;
  --e1:0 1px 2px rgba(8,11,18,.05);
  --e2:0 2px 4px rgba(8,11,18,.05), 0 16px 40px -24px rgba(16,28,60,.28);
  --e3:0 4px 12px rgba(8,11,18,.09), 0 40px 72px -30px rgba(16,28,60,.40);
  --spring:cubic-bezier(.2,.85,.25,1);
  color-scheme:light;
}
@media (prefers-color-scheme:dark){ :root:not([data-theme="light"]){
  --paper:#07090F; --paper-2:#0B0E16;
  --surface:#10141E; --panel:#151A26; --panel-2:#1C2333;
  --ink:#EEF1F7; --ink-2:#A6AEBE; --ink-3:#697182;
  --line:rgba(165,182,214,.14); --line-2:rgba(165,182,214,.24);
  --rule:rgba(233,238,246,.88);
  --accent:#8593FF; --accent-ink:#AAB4FF; --accent-soft:rgba(133,147,255,.15); --accent-line:rgba(133,147,255,.32);
  --on-accent:#080B18;
  --pass:#3CCB8C; --pass-soft:rgba(60,203,140,.15);
  --fail:#F26A5F; --fail-soft:rgba(242,106,95,.15);
  --warn:#E0A94A; --warn-soft:rgba(224,169,74,.15);
  --wash:rgba(133,147,255,.06);
  --bar-track:rgba(165,182,214,.14);
  --e1:0 1px 2px rgba(0,0,0,.45);
  --e2:0 2px 4px rgba(0,0,0,.45), 0 20px 46px -24px rgba(0,0,0,.75);
  --e3:0 4px 12px rgba(0,0,0,.55), 0 46px 80px -32px rgba(0,0,0,.88);
  color-scheme:dark;
}}
:root[data-theme="dark"]{
  --paper:#07090F; --paper-2:#0B0E16;
  --surface:#10141E; --panel:#151A26; --panel-2:#1C2333;
  --ink:#EEF1F7; --ink-2:#A6AEBE; --ink-3:#697182;
  --line:rgba(165,182,214,.14); --line-2:rgba(165,182,214,.24);
  --rule:rgba(233,238,246,.88);
  --accent:#8593FF; --accent-ink:#AAB4FF; --accent-soft:rgba(133,147,255,.15); --accent-line:rgba(133,147,255,.32);
  --on-accent:#080B18;
  --pass:#3CCB8C; --pass-soft:rgba(60,203,140,.15);
  --fail:#F26A5F; --fail-soft:rgba(242,106,95,.15);
  --warn:#E0A94A; --warn-soft:rgba(224,169,74,.15);
  --wash:rgba(133,147,255,.06);
  --bar-track:rgba(165,182,214,.14);
  --e1:0 1px 2px rgba(0,0,0,.45);
  --e2:0 2px 4px rgba(0,0,0,.45), 0 20px 46px -24px rgba(0,0,0,.75);
  --e3:0 4px 12px rgba(0,0,0,.55), 0 46px 80px -32px rgba(0,0,0,.88);
  color-scheme:dark;
}

/* ------------------------------- base ------------------------------- */
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
body{
  margin:0; color:var(--ink); min-height:100vh; position:relative;
  background:
    radial-gradient(1200px 620px at 82% -10%, var(--wash), transparent 60%),
    var(--paper);
  background-attachment:fixed;
  font-family:"IBM Plex Sans",system-ui,-apple-system,Segoe UI,Roboto,sans-serif;
  font-size:16px; line-height:1.62; -webkit-font-smoothing:antialiased; text-underline-offset:3px;
}
.mono{font-family:"IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}
h1,h2,h3,h4{margin:0;font-family:"Fraunces","Iowan Old Style",Georgia,serif;font-weight:600;line-height:1.02;letter-spacing:-.02em;text-wrap:balance}
a{color:inherit}
svg{display:block}
.wrap{max-width:1200px;margin:0 auto;padding:0 30px}
.tnum{font-variant-numeric:tabular-nums}
@media (max-width:640px){.wrap{padding:0 20px}}

/* eyebrow / mono label */
.eyebrow{display:inline-flex;align-items:center;gap:10px;font-family:"IBM Plex Mono",monospace;font-size:11px;font-weight:500;letter-spacing:.22em;text-transform:uppercase;color:var(--ink-3)}
.eyebrow::before{content:"";width:26px;height:2px;background:var(--accent)}

/* full-bleed dark editorial rule */
.rule{height:2px;background:var(--rule);opacity:.9;border:0;margin:0}
.hairline{height:1px;background:var(--line-2);border:0;margin:0}

/* ------------------------------- nav ------------------------------- */
.nav{position:sticky;top:0;z-index:60;background:color-mix(in srgb, var(--paper) 82%, transparent);
  -webkit-backdrop-filter:blur(16px) saturate(1.3);backdrop-filter:blur(16px) saturate(1.3);
  border-bottom:2px solid var(--rule)}
.nav-in{display:flex;align-items:center;gap:22px;height:66px}
.brand{display:flex;align-items:center;gap:11px;font-family:"Fraunces",serif;font-weight:600;font-size:20px;letter-spacing:-.02em}
.brand svg{width:24px;height:24px;flex:none;color:var(--accent)}
.nav-links{margin-left:auto;display:flex;align-items:center;gap:22px}
.nav-links a{font-family:"IBM Plex Mono",monospace;font-size:12.5px;letter-spacing:.02em;color:var(--ink-2);text-decoration:none;transition:color .16s;position:relative}
.nav-links a:not(.btn):not(.iconbtn)::after{content:"";position:absolute;left:0;right:100%;bottom:-6px;height:2px;background:var(--accent);transition:right .24s var(--spring)}
.nav-links a:not(.btn):not(.iconbtn):hover{color:var(--ink)}
.nav-links a:not(.btn):not(.iconbtn):hover::after,.nav-links a[aria-current="page"]::after{right:0}
.nav-links a[aria-current="page"]{color:var(--ink)}
.iconbtn{display:grid;place-items:center;width:38px;height:38px;border-radius:var(--r-xs);border:2px solid var(--rule);
  background:transparent;color:var(--ink);cursor:pointer;transition:.18s var(--spring)}
.iconbtn::after{display:none !important}
.iconbtn:hover{background:var(--accent);border-color:var(--accent);color:var(--on-accent);transform:translateY(-1px)}
.iconbtn svg{width:16px;height:16px}
.btn{display:inline-flex;align-items:center;gap:8px;font-family:"IBM Plex Mono",monospace;font-size:13px;font-weight:600;
  padding:11px 18px;text-decoration:none;cursor:pointer;border:2px solid var(--rule);transition:.2s var(--spring);white-space:nowrap;border-radius:2px}
.btn::after{display:none !important}
.btn svg{width:15px;height:15px;transition:transform .2s var(--spring)}
.btn-primary{background:var(--accent);color:var(--on-accent);border-color:var(--accent)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:6px 6px 0 -1px var(--rule)}
.btn-primary:hover svg{transform:translateX(3px)}
.btn-ghost{background:transparent;color:var(--ink)}
.btn-ghost:hover{background:var(--ink);color:var(--paper);border-color:var(--ink);transform:translateY(-2px)}
.btn-ghost:hover svg{transform:translateX(3px)}
@media (max-width:860px){.nav-links .hide-sm{display:none}}
@media (prefers-reduced-motion:reduce){.btn:hover,.iconbtn:hover{transform:none}}

/* ------------------------------- section frame + numbers ------------------------------- */
.sec{padding:84px 0;position:relative}
.sec-num{display:flex;align-items:baseline;gap:18px;margin-bottom:34px}
.sec-num .no{font-family:"IBM Plex Mono",monospace;font-weight:600;font-size:15px;color:var(--accent-ink);letter-spacing:.04em}
.sec-num .ln{flex:1;height:2px;background:var(--rule);opacity:.85;transform-origin:left;position:relative;top:-4px}
.sec-num .of{font-family:"IBM Plex Mono",monospace;font-size:12px;color:var(--ink-3)}
.sec-head{max-width:20ch}
.sec-head.wide{max-width:30ch}
.sec-head h2{font-size:clamp(34px,5.2vw,64px);line-height:.98;letter-spacing:-.03em}
.sec-head h2 em{font-style:italic;font-weight:400;color:var(--accent-ink)}
.sec-lead{margin:20px 0 0;color:var(--ink-2);font-size:17px;max-width:56ch}
.sec-lead b{color:var(--ink);font-weight:600}

/* ------------------------------- hero ------------------------------- */
.hero{padding:78px 0 30px;position:relative;overflow:hidden}
.hero .marker{display:flex;align-items:baseline;gap:16px;margin-bottom:26px}
.hero .marker .no{font-family:"IBM Plex Mono",monospace;font-weight:600;font-size:14px;color:var(--accent-ink)}
.hero .marker .lab{font-family:"IBM Plex Mono",monospace;font-size:11px;letter-spacing:.2em;text-transform:uppercase;color:var(--ink-3)}
.hero .marker .ln{flex:1;height:2px;background:var(--rule);opacity:.85;transform:translateY(-4px)}
h1.head{font-size:clamp(50px,10.5vw,132px);font-weight:600;line-height:.9;letter-spacing:-.045em}
h1.head .l2{display:block}
h1.head em{font-style:italic;font-weight:400;color:var(--accent-ink)}
.hero-under{display:grid;grid-template-columns:1.15fr .85fr;gap:40px;align-items:end;margin-top:30px}
@media (max-width:820px){.hero-under{grid-template-columns:1fr;gap:26px}}
.hero-sub{font-size:18px;color:var(--ink-2);max-width:46ch}
.hero-sub .live{display:inline-flex;align-items:center;gap:8px;font-weight:600;color:var(--ink)}
.hero-sub .live .dot{width:8px;height:8px;border-radius:50%;background:var(--accent);box-shadow:0 0 0 0 var(--accent-line);animation:pulse 2.2s var(--spring) infinite}
@keyframes pulse{0%{box-shadow:0 0 0 0 var(--accent-line)}70%{box-shadow:0 0 0 9px transparent}100%{box-shadow:0 0 0 0 transparent}}
@media (prefers-reduced-motion:reduce){.hero-sub .live .dot{animation:none}}
.hero-stats{display:flex;gap:0;justify-content:flex-end;flex-wrap:wrap}
.hero-stats .m{padding-left:22px;border-left:2px solid var(--rule);margin-left:22px}
.hero-stats .m:first-child{border-left:none;margin-left:0;padding-left:0}
.hero-stats .m .n{font-family:"Fraunces",serif;font-weight:600;font-size:clamp(30px,4vw,44px);line-height:1;letter-spacing:-.03em}
.hero-stats .m .l{font-family:"IBM Plex Mono",monospace;font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-3);margin-top:8px}
.cta-row{display:flex;gap:14px;flex-wrap:wrap;align-items:center;margin-top:34px}

/* language ticker */
.ticker{margin-top:44px;border-top:2px solid var(--rule);border-bottom:2px solid var(--rule);overflow:hidden;position:relative;padding:12px 0}
.ticker-track{display:inline-flex;gap:0;white-space:nowrap;animation:marq 34s linear infinite;will-change:transform}
.ticker:hover .ticker-track{animation-play-state:paused}
@media (prefers-reduced-motion:reduce){.ticker-track{animation:none}}
.ticker-track .it{font-family:"IBM Plex Mono",monospace;font-size:12px;color:var(--ink-2);padding:0 22px;display:inline-flex;align-items:center;gap:10px}
.ticker-track .it::before{content:"";width:5px;height:5px;border-radius:50%;background:var(--accent)}
@keyframes marq{from{transform:translateX(0)}to{transform:translateX(-50%)}}

/* ------------------------------- signature console (exhibit) ------------------------------- */
.exhibit{margin-top:56px;display:grid;grid-template-columns:auto 1fr;gap:26px;align-items:start}
@media (max-width:820px){.exhibit{grid-template-columns:1fr}}
.exhibit .cap{font-family:"IBM Plex Mono",monospace;font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-3);writing-mode:vertical-rl;transform:rotate(180deg);white-space:nowrap;align-self:stretch;border-right:2px solid var(--rule);padding-right:14px}
@media (max-width:820px){.exhibit .cap{writing-mode:horizontal-tb;transform:none;border-right:none;border-bottom:2px solid var(--rule);padding:0 0 10px}}
.console{position:relative;background:var(--surface);border:2px solid var(--rule);box-shadow:8px 8px 0 -1px var(--accent);overflow:hidden;font-family:"IBM Plex Mono",monospace}
.con-bar{display:flex;align-items:center;gap:9px;padding:12px 16px;border-bottom:2px solid var(--rule);background:var(--panel)}
.con-bar .cc{display:flex;gap:6px}.cc i{width:9px;height:9px;border-radius:50%;background:var(--line-2);display:block}
.con-bar .ct{margin-left:6px;font-size:11.5px;color:var(--ink-2)}
.con-bar .cve{margin-left:auto;font-size:11px;color:var(--on-accent);background:var(--accent);padding:3px 9px;font-weight:600}
.diff{padding:18px;font-size:13px;line-height:1.75;position:relative}
.diff .fn{color:var(--ink-3);font-size:11px;padding:0 0 10px;display:block}
.code .ln{display:grid;grid-template-columns:1.6ch 1fr;gap:8px;padding:2px 8px;margin:1px 0;white-space:pre}
.code .ln .sg{font-weight:600;color:var(--ink-3)}.code .ln .tx{color:var(--ink-2)}
.code .ln.ctx .tx{color:var(--ink-3)}
.code .ln.del{background:var(--fail-soft)}.code .ln.del .sg,.code .ln.del .tx{color:var(--fail)}
.code .ln.add{background:var(--pass-soft)}.code .ln.add .sg,.code .ln.add .tx{color:var(--pass)}
.scanline{position:absolute;left:0;right:0;height:44px;pointer-events:none;background:linear-gradient(180deg,transparent,var(--accent-soft),transparent);opacity:0}
.con-foot{display:flex;align-items:center;gap:12px;padding:15px 16px;border-top:2px solid var(--rule);background:var(--panel)}
.run{font-size:12px;color:var(--ink-2);display:flex;align-items:center;gap:9px}
.run .sp{width:11px;height:11px;border-radius:50%;border:2px solid var(--accent-line);border-top-color:var(--accent);animation:spin .8s linear infinite}
.run .sp.done{animation:none;border-color:var(--pass);border-top-color:var(--pass);background:var(--pass)}
@keyframes spin{to{transform:rotate(360deg)}}
@media (prefers-reduced-motion:reduce){.run .sp{animation:none}}
.seal{margin-left:auto;display:flex;align-items:center;gap:11px;border:2px solid var(--pass);padding:8px 14px;background:var(--pass-soft);opacity:0;transform:scale(.85) rotate(-3deg)}
.seal.in{animation:stamp .5s cubic-bezier(.2,1.5,.4,1) forwards}
@keyframes stamp{0%{opacity:0;transform:scale(1.3) rotate(-6deg)}100%{opacity:1;transform:scale(1) rotate(-1.5deg)}}
@media (prefers-reduced-motion:reduce){.seal,.seal.in{opacity:1;transform:none;animation:none}}
.seal svg{width:26px;height:26px;color:var(--pass)}
.seal .vt{font-family:"Fraunces",serif;font-weight:900;font-size:22px;letter-spacing:.03em;color:var(--pass);line-height:1}
.seal .vs{font-size:9.5px;color:var(--ink-3);margin-top:3px}

/* ------------------------------- protocol / how ------------------------------- */
.proto{display:grid;grid-template-columns:repeat(3,1fr);gap:0;border:2px solid var(--rule);background:var(--rule)}
.proto .step{background:var(--surface);padding:26px 24px;transition:.24s var(--spring)}
.proto .step:hover{background:var(--panel)}
.step .k{font-family:"IBM Plex Mono",monospace;font-size:12px;color:var(--on-accent);background:var(--accent);padding:5px 10px;display:inline-block;margin-bottom:18px;font-weight:600}
.step h3{font-size:22px;margin-bottom:9px;letter-spacing:-.02em}
.step p{margin:0;color:var(--ink-2);font-size:14.5px}
.step .io{margin-top:16px;border-top:1px solid var(--line-2);padding-top:14px;font-family:"IBM Plex Mono",monospace;font-size:12px;color:var(--ink-3)}
.step .io .v{color:var(--pass)}.step .io .f{color:var(--fail)}
@media (max-width:820px){.proto{grid-template-columns:1fr}}
.split{display:grid;grid-template-columns:1fr 1fr;gap:26px;margin-top:30px}
@media (max-width:820px){.split{grid-template-columns:1fr}}
.card{position:relative;background:var(--surface);border:2px solid var(--rule);padding:26px}
.card h3{font-size:22px;margin-bottom:6px;letter-spacing:-.02em}.card .lead{color:var(--ink-2);font-size:14.5px;margin:0 0 20px}
.ladder{display:flex;flex-direction:column;gap:0;border-top:1px solid var(--line-2)}
.rung{display:grid;grid-template-columns:56px 1fr auto;align-items:center;gap:14px;padding:13px 0;border-bottom:1px solid var(--line-2)}
.rung .lv{font-family:"IBM Plex Mono",monospace;font-weight:600;font-size:14px;color:var(--accent-ink)}
.rung .nm{font-size:14px}.rung .nm small{color:var(--ink-3);display:block;font-size:12.5px}
.rung .hd{font-family:"IBM Plex Mono",monospace;font-size:11px;color:var(--ink-3);text-transform:uppercase;letter-spacing:.08em}
.rung.z .lv,.rung.z .hd{color:var(--accent-ink)}.rung.z{background:var(--wash)}
.checks{display:flex;flex-direction:column;gap:18px}
.check{display:flex;gap:14px}
.check .ic{flex:none;width:34px;height:34px;border:2px solid var(--rule);display:grid;place-items:center;color:var(--accent-ink)}
.check .ic svg{width:16px;height:16px}
.check b{display:block;font-size:15px;margin-bottom:2px}.check span{color:var(--ink-2);font-size:13.5px}

/* ------------------------------- cases ------------------------------- */
.sec-top{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap;margin-bottom:28px}
.filters{display:flex;gap:0;flex-wrap:wrap;align-items:center;border:2px solid var(--rule)}
.filters .fl{font-family:"IBM Plex Mono",monospace;font-size:10px;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-3);padding:0 14px;align-self:center}
.chip{font-family:"IBM Plex Mono",monospace;font-size:12px;padding:8px 14px;border:0;border-left:2px solid var(--rule);background:transparent;color:var(--ink-2);cursor:pointer;transition:.16s var(--spring)}
.chip:hover{background:var(--panel);color:var(--ink)}
.chip[aria-pressed="true"]{background:var(--accent);color:var(--on-accent);font-weight:600}
.cases-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(324px,1fr));gap:0;border-top:2px solid var(--rule);border-left:2px solid var(--rule)}
.casecard{position:relative;background:var(--surface);border-right:2px solid var(--rule);border-bottom:2px solid var(--rule);padding:24px;transition:.2s var(--spring);display:flex;flex-direction:column;gap:14px;min-height:210px}
.casecard::before{content:"";position:absolute;inset:0;background:var(--accent);transform:scaleY(0);transform-origin:bottom;transition:transform .24s var(--spring);z-index:0;opacity:.04}
.casecard:hover::before{transform:scaleY(1)}
.casecard>*{position:relative;z-index:1}
a.casecard{text-decoration:none;color:inherit;cursor:pointer}
.casecard:hover{transform:translateY(-2px)}
.cc-top{display:flex;align-items:center;gap:10px}
.langbadge{font-family:"IBM Plex Mono",monospace;font-size:11px;font-weight:600;letter-spacing:.03em;padding:3px 9px;border:2px solid var(--accent);color:var(--accent-ink);text-transform:lowercase}
.casecard .cid{font-family:"IBM Plex Mono",monospace;font-size:11px;color:var(--ink-3);margin-left:auto;word-break:break-all;text-align:right}
.casecard h4{margin:0;font-family:"Fraunces",serif;font-weight:600;font-size:21px;letter-spacing:-.02em;line-height:1.12}
.cc-tiers{display:flex;gap:5px;margin-top:auto}
.tchip{flex:1;text-align:center;font-family:"IBM Plex Mono",monospace;font-size:11px;padding:7px 0;border:1px solid var(--line-2);color:var(--ink-2)}
.tchip .r{display:block;font-size:9px;color:var(--ink-3);margin-top:1px}
.tchip.z{border-color:var(--accent);color:var(--accent-ink)}
.cc-open{font-family:"IBM Plex Mono",monospace;font-size:12px;color:var(--ink-3);border-top:1px solid var(--line-2);padding-top:13px;display:flex;align-items:center;gap:7px;letter-spacing:.02em;text-transform:uppercase}
.cc-open .cp{margin-left:auto;flex:none;display:inline-flex;align-items:center;color:var(--ink-3);transition:.2s var(--spring)}
.cc-open .cp svg{width:16px;height:16px}
.casecard:hover .cc-open,.casecard:hover .cc-open .cp{color:var(--accent-ink)}
.casecard:hover .cc-open .cp{transform:translateX(4px)}
@media (prefers-reduced-motion:reduce){.casecard:hover,.casecard:hover .cc-open .cp{transform:none}}

/* ------------------------------- browse page head ------------------------------- */
.page-head{padding:56px 0 6px;position:relative}
.page-head h1{font-size:clamp(40px,7vw,84px);line-height:.92;letter-spacing:-.04em;margin-top:16px}
.page-head p{margin:20px 0 0;color:var(--ink-2);font-size:17px;max-width:60ch}
.page-head p b{color:var(--ink);font-weight:600}
.toolbar{display:flex;align-items:stretch;gap:16px;flex-wrap:wrap;margin:30px 0 0}
.search{position:relative;flex:1;min-width:230px;max-width:400px;display:flex;align-items:center}
.search svg{position:absolute;left:14px;width:16px;height:16px;color:var(--ink-3);pointer-events:none}
.search input{width:100%;font-family:"IBM Plex Mono",monospace;font-size:13px;color:var(--ink);background:var(--surface);border:2px solid var(--rule);padding:11px 16px 11px 40px;transition:.18s var(--spring);border-radius:2px}
.search input::placeholder{color:var(--ink-3)}
.search input:focus{outline:none;border-color:var(--accent);box-shadow:4px 4px 0 -1px var(--accent)}
.count{margin-left:auto;align-self:center;font-family:"IBM Plex Mono",monospace;font-size:12px;color:var(--ink-3);white-space:nowrap}
.count b{color:var(--ink);font-weight:600;font-size:15px}

/* ------------------------------- breadcrumb / back ------------------------------- */
.crumbs{display:flex;align-items:center;gap:10px;font-family:"IBM Plex Mono",monospace;font-size:12px;color:var(--ink-3);padding-top:52px}
.crumbs a{color:var(--ink-2);text-decoration:none;transition:.14s}
.crumbs a:hover{color:var(--accent-ink)}
.crumbs .sep{opacity:.5}
.crumbs .here{color:var(--ink);word-break:break-all}
.backlink{display:inline-flex;align-items:center;gap:9px;font-family:"IBM Plex Mono",monospace;font-size:13px;color:var(--ink-2);text-decoration:none;transition:.16s var(--spring)}
.backlink svg{width:16px;height:16px;transition:.16s var(--spring)}
.backlink:hover{color:var(--accent-ink)}.backlink:hover svg{transform:translateX(-4px)}
@media (prefers-reduced-motion:reduce){.backlink:hover svg{transform:none}}

/* ------------------------------- leaderboard ------------------------------- */
.lb-controls{display:flex;align-items:center;gap:14px;flex-wrap:wrap;margin:30px 0 24px}
.triple{display:inline-flex;align-items:stretch;font-family:"IBM Plex Mono",monospace;font-size:12px;border:2px solid var(--rule)}
.triple span{padding:9px 13px;border-right:2px solid var(--rule);color:var(--ink-2);display:flex;align-items:center}.triple span:last-child{border-right:none}
.triple span b{color:var(--ink);font-weight:600;margin-left:6px}.triple .lab{background:var(--ink);color:var(--paper);letter-spacing:.08em;text-transform:uppercase;font-size:10px}
.kswitch{display:inline-flex;border:2px solid var(--rule);font-family:"IBM Plex Mono",monospace}
.kswitch button{padding:9px 15px;border:0;border-right:2px solid var(--rule);background:transparent;color:var(--ink-2);cursor:pointer;font-size:12px;font-weight:600;transition:.15s}
.kswitch button:last-child{border-right:none}
.kswitch button[aria-pressed="true"]{background:var(--accent);color:var(--on-accent)}
.badge-live{margin-left:auto;font-family:"IBM Plex Mono",monospace;font-size:11px;color:var(--accent-ink);border:2px solid var(--accent-line);padding:6px 12px;display:inline-flex;align-items:center;gap:8px}
.badge-live .dot{width:6px;height:6px;border-radius:50%;background:var(--accent);box-shadow:0 0 8px var(--accent)}

/* podium (top 3) */
.podium{display:grid;grid-template-columns:repeat(3,1fr);gap:0;border:2px solid var(--rule);border-bottom:none;margin-bottom:0}
@media (max-width:760px){.podium{grid-template-columns:1fr}}
.pod{padding:24px;border-right:2px solid var(--rule);position:relative;overflow:hidden}
.pod:last-child{border-right:none}
.pod.p1{background:var(--accent);color:var(--on-accent)}
.pod.p1 .pm,.pod.p1 .pr,.pod.p1 .pv-l{color:color-mix(in srgb,var(--on-accent) 78%,transparent)}
.pod .pr{font-family:"IBM Plex Mono",monospace;font-size:12px;letter-spacing:.1em;color:var(--ink-3);text-transform:uppercase}
.pod .rankbig{font-family:"Fraunces",serif;font-weight:900;font-size:54px;line-height:1;letter-spacing:-.03em;margin:6px 0 14px}
.pod .ph{font-family:"Fraunces",serif;font-weight:600;font-size:20px;letter-spacing:-.02em;line-height:1.1;word-break:break-word}
.pod .pm{font-family:"IBM Plex Mono",monospace;font-size:11.5px;color:var(--ink-3);margin-top:3px}
.pod .pv{margin-top:16px;display:flex;align-items:baseline;gap:8px}
.pod .pv-n{font-family:"Fraunces",serif;font-weight:600;font-size:34px;letter-spacing:-.03em;line-height:1}
.pod .pv-l{font-family:"IBM Plex Mono",monospace;font-size:11px;color:var(--ink-3)}

.tablewrap{overflow-x:auto;border:2px solid var(--rule)}
table.lb{width:100%;border-collapse:collapse;min-width:720px}
.lb thead th{font-family:"IBM Plex Mono",monospace;font-size:10px;letter-spacing:.12em;text-transform:uppercase;color:var(--ink-3);text-align:left;padding:15px 18px;border-bottom:2px solid var(--rule);font-weight:600;white-space:nowrap;background:var(--panel)}
.lb thead th.r{text-align:right}
.lb tbody td{padding:16px 18px;border-bottom:1px solid var(--line-2);vertical-align:middle}
.lb tbody tr:last-child td{border-bottom:none}.lb tbody tr{transition:background .16s;cursor:pointer}.lb tbody tr:hover{background:var(--panel)}
.lb tbody tr.open{background:var(--wash)}
.rk{display:flex;align-items:center;gap:13px}
.rk .n{width:30px;height:30px;flex:none;display:grid;place-items:center;font-family:"IBM Plex Mono",monospace;font-weight:600;font-size:13px;border:2px solid var(--rule);color:var(--ink-2)}
.rk .n.top{background:var(--accent);color:var(--on-accent);border-color:var(--accent)}
.sub-id b{font-weight:600;font-size:15px;font-family:"Fraunces",serif;letter-spacing:-.01em}.sub-id .mo{font-family:"IBM Plex Mono",monospace;font-size:11px;color:var(--ink-3);margin-top:1px;display:block}
.metric{min-width:200px}.metric .top{display:flex;align-items:baseline;justify-content:space-between;gap:10px;margin-bottom:7px}
.metric .val{font-family:"IBM Plex Mono",monospace;font-weight:600;font-size:16px}.metric .ci{font-family:"IBM Plex Mono",monospace;font-size:11px;color:var(--ink-3)}
.track{position:relative;height:8px;background:var(--bar-track)}
.track .fill{position:absolute;top:0;left:0;height:100%;background:var(--accent);transition:width .9s var(--spring)}
.track .whisk{position:absolute;top:50%;height:10px;transform:translateY(-50%);border-left:2px solid var(--ink-3);border-right:2px solid var(--ink-3)}
.track .whisk::before{content:"";position:absolute;top:50%;left:0;right:0;height:2px;transform:translateY(-50%);background:var(--ink-3);opacity:.45}
.p5{font-family:"IBM Plex Mono",monospace;font-size:15px;color:var(--ink-2);font-weight:600}
.nn{font-family:"IBM Plex Mono",monospace;font-size:14px;color:var(--ink-2)}
.expander{font-family:"IBM Plex Mono",monospace;font-size:11px;color:var(--ink-3);display:inline-flex;align-items:center;gap:6px}
.expander svg{width:12px;height:12px;transition:transform .2s var(--spring)}
tr.open .expander svg{transform:rotate(90deg)}
.breakdown td{background:var(--panel);border-bottom:2px solid var(--rule) !important;padding:0 !important}
.bd-in{padding:18px 22px;display:grid;grid-template-columns:1fr 1fr;gap:26px}
@media (max-width:640px){.bd-in{grid-template-columns:1fr}}
.bd-in h5{margin:0 0 12px;font-family:"IBM Plex Mono",monospace;font-size:10.5px;letter-spacing:.12em;text-transform:uppercase;color:var(--ink-3);font-weight:600}
.bd-row{display:grid;grid-template-columns:70px 1fr 46px;align-items:center;gap:12px;padding:6px 0}
.bd-row .bl{font-family:"IBM Plex Mono",monospace;font-size:12px;color:var(--ink-2)}
.bd-row .bt{height:6px;background:var(--bar-track);position:relative}
.bd-row .bt .bf{position:absolute;inset:0 auto 0 0;background:var(--accent-ink)}
.bd-row .bv{font-family:"IBM Plex Mono",monospace;font-size:12px;color:var(--ink-2);text-align:right}
.empty{padding:30px 18px;text-align:center;color:var(--ink-3);font-family:"IBM Plex Mono",monospace;font-size:13px}

/* ------------------------------- case detail ------------------------------- */
.detail{padding:22px 0 44px}
.detail-head{display:flex;align-items:flex-start;gap:18px;flex-wrap:wrap;margin:22px 0 6px}
.detail-head .langbadge{margin-top:10px}
.detail-head h1{font-size:clamp(32px,5.4vw,60px);flex:1;min-width:260px;line-height:.96;letter-spacing:-.03em}
.detail-id{font-family:"IBM Plex Mono",monospace;font-size:12.5px;color:var(--ink-3);margin-top:10px;word-break:break-all}
.metastrip{display:flex;flex-wrap:wrap;gap:0;border:2px solid var(--rule);margin-top:12px}
.metastrip .m{flex:1;min-width:130px;padding:16px 18px;border-right:2px solid var(--rule)}
.metastrip .m:last-child{border-right:none}
.metastrip .m .n{font-family:"Fraunces",serif;font-weight:600;font-size:26px;line-height:1;letter-spacing:-.02em}
.metastrip .m .l{font-family:"IBM Plex Mono",monospace;font-size:10px;letter-spacing:.12em;text-transform:uppercase;color:var(--ink-3);margin-top:8px}
.detail-grid{display:grid;grid-template-columns:1.4fr .9fr;gap:26px;margin-top:34px;align-items:start}
@media (max-width:900px){.detail-grid{grid-template-columns:1fr}}
.panel{position:relative;background:var(--surface);border:2px solid var(--rule);padding:26px}
.panel + .panel{margin-top:24px}
.panel h3{font-size:22px;margin-bottom:4px;letter-spacing:-.02em}
.panel .lead{color:var(--ink-2);font-size:14.5px;margin:0 0 18px}
.panel-label{font-family:"IBM Plex Mono",monospace;font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--accent-ink);margin-bottom:16px}
.tier{display:grid;grid-template-columns:46px 1fr 130px;align-items:center;gap:14px;padding:14px 0;border-bottom:1px solid var(--line-2)}
.tier:last-child{border-bottom:none}
.tier .lv{font-family:"IBM Plex Mono",monospace;font-weight:600;font-size:14px;color:var(--accent-ink);border:2px solid var(--accent-line);padding:5px 0;text-align:center}
.tier .nm{font-size:14px}.tier .nm small{display:block;color:var(--ink-3);font-size:12.5px}
.tier .solve{text-align:right}
.tier .solve .v{font-family:"IBM Plex Mono",monospace;font-weight:600;font-size:15px}
.tier .solve .v.none{color:var(--ink-3);font-weight:400}
.tier .solve .track{margin-top:7px}
.tier .solve .sub{font-family:"IBM Plex Mono",monospace;font-size:10px;color:var(--ink-3);margin-top:5px}
.cmd{display:flex;align-items:center;gap:12px;background:var(--ink);border:2px solid var(--ink);padding:14px 16px;font-family:"IBM Plex Mono",monospace;font-size:12.5px;color:var(--paper);overflow-x:auto}
.cmd .pmt{color:var(--accent);flex:none;font-weight:600}
.cmd code{white-space:nowrap}
.cmd .copy{margin-left:auto;flex:none;font-size:10.5px;color:var(--paper);background:transparent;border:2px solid color-mix(in srgb,var(--paper) 40%,transparent);padding:5px 10px;cursor:pointer;font-family:inherit;transition:.15s}
.cmd .copy:hover{background:var(--accent);border-color:var(--accent);color:var(--on-accent)}
.flow{display:flex;flex-direction:column;gap:0}
.flow .fs{display:grid;grid-template-columns:30px 1fr;gap:14px;padding:14px 0;position:relative}
.flow .fs:not(:last-child)::before{content:"";position:absolute;left:14px;top:36px;bottom:-14px;width:2px;background:var(--line-2)}
.flow .fs .fn{width:30px;height:30px;flex:none;display:grid;place-items:center;border:2px solid var(--rule);background:var(--surface);color:var(--accent-ink);font-family:"IBM Plex Mono",monospace;font-size:13px;font-weight:600;z-index:1}
.flow .fs .ft b{font-size:15px}.flow .fs .ft .cx{font-family:"IBM Plex Mono",monospace;font-size:11.5px;color:var(--accent-ink);display:block;margin-top:2px}
.flow .fs .ft p{margin:6px 0 0;font-size:13.5px;color:var(--ink-2)}
.notfound{text-align:center;padding:80px 20px}
.notfound h2{font-size:34px;margin-bottom:12px}
.notfound p{color:var(--ink-2);margin:0 0 24px}

/* ------------------------------- docs / code ------------------------------- */
.docs-grid{display:grid;grid-template-columns:1fr 1fr;gap:26px}
@media (max-width:900px){.docs-grid{grid-template-columns:1fr}}
.doc h3{font-size:22px;margin-bottom:4px;letter-spacing:-.02em}
.doc .num{font-family:"IBM Plex Mono",monospace;font-size:12px;color:var(--on-accent);background:var(--accent);padding:4px 10px;display:inline-block;margin-bottom:16px;font-weight:600}
.doc p{color:var(--ink-2);font-size:14.5px;margin:0 0 16px}
pre.cb{margin:0 0 16px;background:var(--ink);color:var(--paper);border:2px solid var(--ink);padding:16px 18px;overflow-x:auto;font-family:"IBM Plex Mono",monospace;font-size:12.5px;line-height:1.75;position:relative}
pre.cb .c{color:color-mix(in srgb,var(--paper) 52%,transparent)}pre.cb .k{color:var(--accent)}pre.cb .s{color:var(--pass)}
:root pre.cb .k{color:#7C8CFF}:root pre.cb .s{color:#5AD59A}
pre.cb .copy{position:absolute;top:10px;right:10px;font-size:10.5px;color:var(--paper);background:transparent;border:2px solid color-mix(in srgb,var(--paper) 36%,transparent);padding:4px 9px;cursor:pointer;transition:.15s;font-family:inherit}
pre.cb .copy:hover{background:var(--accent);border-color:var(--accent);color:var(--on-accent)}
.note{font-size:13px;color:var(--ink-3);display:flex;gap:10px;align-items:flex-start}
.note svg{width:15px;height:15px;color:var(--accent);flex:none;margin-top:2px}

.api-tbl-wrap{overflow-x:auto;border:2px solid var(--rule)}
table.api{width:100%;border-collapse:collapse;min-width:700px}
.api th{font-family:"IBM Plex Mono",monospace;font-size:10px;letter-spacing:.12em;text-transform:uppercase;color:var(--ink-3);text-align:left;padding:14px 18px;border-bottom:2px solid var(--rule);font-weight:600;background:var(--panel)}
.api td{padding:14px 18px;border-bottom:1px solid var(--line-2);vertical-align:top;font-size:13.5px;color:var(--ink-2)}
.api tr:last-child td{border-bottom:none}
.api td.ep{font-family:"IBM Plex Mono",monospace;font-size:12.5px;color:var(--ink);white-space:nowrap}
.verb{font-family:"IBM Plex Mono",monospace;font-size:11px;font-weight:600;padding:2px 7px;margin-right:8px}
.verb.get{color:var(--on-accent);background:var(--pass)}
.verb.post{color:var(--on-accent);background:var(--accent)}
.verb.del{color:var(--on-accent);background:var(--fail)}
.auth{font-family:"IBM Plex Mono",monospace;font-size:11px;color:var(--ink-3)}
.auth.pub{color:var(--pass)}.auth.key{color:var(--warn)}.auth.tok{color:var(--accent-ink)}

/* ------------------------------- footer ------------------------------- */
.foot{padding:60px 0 50px;position:relative;border-top:2px solid var(--rule)}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr;gap:36px}
.foot p{color:var(--ink-2);font-size:14.5px;max-width:40ch;margin:14px 0 0}
.foot h4{font-family:"IBM Plex Mono",monospace;font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-3);margin:0 0 16px}
.foot ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:11px}
.foot ul a{font-size:14px;color:var(--ink-2);text-decoration:none;transition:.14s}.foot ul a:hover{color:var(--accent-ink)}
.foot-note{margin-top:42px;padding-top:24px;border-top:1px solid var(--line-2);display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-family:"IBM Plex Mono",monospace;font-size:11.5px;color:var(--ink-3)}
@media (max-width:720px){.foot-grid{grid-template-columns:1fr;gap:26px}}

/* ------------------------------- reveal / motion ------------------------------- */
.rv{opacity:0;transform:translateY(20px)}
.rv.seen{opacity:1;transform:none;transition:opacity .7s ease,transform .7s var(--spring)}
@media (prefers-reduced-motion:reduce){.rv{opacity:1;transform:none}.rv.seen{transition:none}}
.hero .anim-line{opacity:0;transform:translateY(28px);animation:riseIn .9s var(--spring) forwards}
.hero .anim-line.d1{animation-delay:.05s}.hero .anim-line.d2{animation-delay:.16s}.hero .anim-line.d3{animation-delay:.30s}.hero .anim-line.d4{animation-delay:.44s}
@keyframes riseIn{to{opacity:1;transform:none}}
@media (prefers-reduced-motion:reduce){.hero .anim-line{opacity:1;transform:none;animation:none}}
:focus-visible{outline:3px solid var(--accent);outline-offset:2px}
::selection{background:var(--accent);color:var(--on-accent)}