/* MetricSplit site stylesheet: every page links this one file (Semrush 'low text-to-code ratio', 11 Oct).
   /assets/ is cached for a year (immutable): after ANY change here, save it under the next version
   (site-v2.css, ...) and update the <link> in site/index.src.html, then run scripts/guides/make_guides.py. */

/* ===================================================================
   MetricSplit homepage
   Colours mirror the product: teal = healthy / business,
   amber = approaching / non-business, red = needs action,
   slate = almost unused. Keep them in sync with the dashboard.
   =================================================================== */
:root{
  --bg:#0a1320;
  --panel:#0f1b2c;
  --raised:#152438;
  --line:#22344c;
  --ink:#e9eef5;
  --muted:#97a8be;
  --soft:#c4d0de;
  --teal:#2fd6ad;
  --teal-dim:#1c7f69;
  --amber:#f2a541;
  --red:#f06a6a;
  --slate:#7f8ea3;
  --display:"Space Grotesk","Segoe UI",system-ui,-apple-system,sans-serif;
  --body:"IBM Plex Sans","Segoe UI",system-ui,-apple-system,sans-serif;
  --mono:"IBM Plex Mono",ui-monospace,"SFMono-Regular",Consolas,monospace;
  --wrap:1160px;
  --radius-s:6px;
  --radius-m:12px;
  box-sizing:border-box;
  padding-top:env(safe-area-inset-top,0px);
  padding-bottom:env(safe-area-inset-bottom,0px);
}
*,*::before,*::after{box-sizing:inherit}
html{scroll-behavior:smooth;scroll-padding-top:calc(76px + env(safe-area-inset-top,0px))}
body{margin:0;background:var(--bg);color:var(--ink);font:400 17px/1.6 var(--body);-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
img,svg{max-width:100%;display:block}
a{color:var(--teal)}
a:hover{color:#6fe6c8}
:focus-visible{outline:2px solid var(--teal);outline-offset:3px;border-radius:4px}
.wrap{width:min(var(--wrap),100% - 40px);margin-inline:auto}
.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}

/* ---------- type ---------- */
h1,h2,h3{font-family:var(--display);font-weight:600;letter-spacing:-.02em;line-height:1.08;margin:0}
h1{font-size:clamp(2.5rem,5.2vw,4.25rem);font-weight:700;max-width:14ch}
h2{font-size:clamp(1.85rem,3.2vw,2.75rem);max-width:22ch}
h3{font-size:1.25rem;letter-spacing:-.01em;line-height:1.25}
p{margin:0}
.lede{font-size:clamp(1.08rem,1.5vw,1.22rem);color:var(--soft);max-width:58ch}
.intro{color:var(--muted);max-width:62ch;margin-top:14px}
.mono{font-family:var(--mono);font-size:.92em;letter-spacing:0}

/* ---------- buttons, tags ---------- */
.btn{display:inline-flex;align-items:center;gap:8px;font:600 1rem/1 var(--body);padding:14px 20px;border-radius:var(--radius-s);text-decoration:none;border:1px solid transparent;cursor:pointer}
.btn-primary{background:var(--teal);color:#06231b}
.btn-primary:hover{background:#5ee3c1;color:#06231b}
.btn-ghost{color:var(--ink);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--teal);color:var(--ink)}
.tag{display:inline-block;font:500 .78rem/1 var(--body);padding:5px 9px;border-radius:999px;border:1px solid var(--line);color:var(--muted);white-space:nowrap}
/* Anything not live yet carries data-status="soon". When a feature ships, delete the attribute
   (and its .tag) and add the claim to the claims register. */
.tag-soon{border-color:rgba(242,165,65,.55);color:var(--amber)}
.tag-example{border-style:dashed}

/* ---------- header ---------- */
.site-header{position:sticky;top:env(safe-area-inset-top,0px);z-index:20;background:rgba(10,19,32,.92);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;gap:20px;min-height:68px}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none;color:var(--ink)}
.brand-mark{width:36px;height:36px;flex:none}
.brand-name{font:700 1.02rem/1 var(--display);letter-spacing:.04em}
.brand-tag{display:block;font:500 .78rem/1.3 var(--body);color:var(--teal);letter-spacing:0;margin-top:3px}
.nav{display:flex;align-items:center;gap:26px}
.nav a{color:var(--soft);text-decoration:none;font-size:.95rem}
.nav a:hover{color:var(--ink)}
.nav .btn{padding:11px 16px;font-size:.95rem}
.nav .btn-primary{color:#06231b}
.menu-toggle{display:none;background:none;border:1px solid var(--line);color:var(--ink);font:500 .95rem var(--body);padding:9px 14px;border-radius:var(--radius-s);cursor:pointer}

/* ---------- hero ---------- */
.hero{padding:72px 0 88px}
.hero .wrap{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.05fr);gap:56px;align-items:start}
.hero-copy{padding-top:12px}
.hero-copy .lede{margin-top:22px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:32px}
.hero-note{margin-top:26px;color:var(--muted);font-size:.95rem;max-width:52ch}
.hero-note strong{color:var(--soft);font-weight:500}

/* the verdict ledger: the one bold element on the page */
.ledger{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius-m);overflow:hidden}
.ledger-head{display:flex;justify-content:space-between;align-items:baseline;gap:12px;padding:18px 20px 14px;border-bottom:1px solid var(--line)}
.ledger-head h2{font-size:1.05rem;font-family:var(--body);font-weight:600;letter-spacing:0;max-width:none}
.ledger-head p{color:var(--muted);font-size:.85rem;margin-top:3px}
.ledger ol{list-style:none;margin:0;padding:0}
.row{border-bottom:1px solid var(--line)}
.row:last-child{border-bottom:0}
.row-head{width:100%;display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,1.6fr) 8.4rem;gap:14px;align-items:center;padding:14px 20px;background:none;border:0;color:inherit;text-align:left;font:inherit;cursor:pointer}
.row-head:hover{background:var(--raised)}
.rname{font-family:var(--mono);font-size:.92rem;font-weight:500;display:block}
.rcap{display:block;color:var(--muted);font-size:.8rem}
.dirs{display:grid;gap:6px}
.dir{display:grid;grid-template-columns:14px minmax(0,1fr) 3.4em;gap:8px;align-items:center;font-size:.8rem;color:var(--muted)}
.track{height:7px;background:#1b2c42;border-radius:4px;overflow:hidden;position:relative}
.track::after{content:"";position:absolute;top:-2px;bottom:-2px;left:85%;width:1px;background:rgba(240,106,106,.6)}
.fill{display:block;height:100%;width:var(--v);border-radius:4px;background:var(--c,var(--teal));transform-origin:left;animation:grow .9s cubic-bezier(.2,.7,.2,1) both;animation-delay:var(--d,0s)}
@keyframes grow{from{transform:scaleX(0)}to{transform:scaleX(1)}}
.dir b{font-weight:500;color:var(--soft);text-align:right;font-variant-numeric:tabular-nums}
.pill{font:600 .78rem/1 var(--body);padding:6px 9px;border-radius:999px;white-space:nowrap;justify-self:end}
.s-action .pill{background:rgba(240,106,106,.14);color:#ff9a9a}
.s-near .pill{background:rgba(242,165,65,.14);color:#ffc277}
.s-ok .pill{background:rgba(47,214,173,.12);color:#6fe6c8}
.s-idle .pill{background:rgba(127,142,163,.16);color:#b7c3d2}
.s-action{--c:var(--red)}
.s-near{--c:var(--amber)}
.s-idle{--c:var(--slate)}
.evidence{padding:0 20px 16px;color:var(--soft);font-size:.92rem;max-width:60ch}
.evidence strong{color:var(--ink);font-weight:600}
.row-head[aria-expanded="true"]{background:var(--raised)}
.ledger-foot{padding:12px 20px;border-top:1px solid var(--line);color:var(--muted);font-size:.82rem;display:flex;gap:14px;flex-wrap:wrap}
.key{display:inline-flex;align-items:center;gap:6px}
.key i{width:9px;height:9px;border-radius:50%;display:inline-block}

/* ---------- sections ---------- */
section{padding:92px 0}
.band{background:var(--panel);border-block:1px solid var(--line)}
.section-head{margin-bottom:44px}

/* capacity split */
.split-grid{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,.9fr);gap:56px;align-items:center}
.stack{display:flex;height:56px;border-radius:var(--radius-s);overflow:hidden;border:1px solid var(--line)}
.stack span{display:flex;align-items:center;padding-left:12px;font:600 .9rem var(--body);color:#06231b;white-space:nowrap;overflow:hidden}
.seg-b{background:var(--teal)}
.seg-n{background:var(--amber)}
.seg-u{background:var(--slate)}
.seg-i{background:repeating-linear-gradient(135deg,#152438 0 8px,#1a2b41 8px 16px);color:var(--muted)!important}
.legend{display:flex;flex-wrap:wrap;gap:22px;margin-top:16px;font-size:.92rem;color:var(--soft)}
.legend .key i{border-radius:3px}
.split-figure figcaption{margin-top:18px;color:var(--muted);font-size:.92rem}
.honest{border-left:3px solid var(--amber);padding:4px 0 4px 18px;color:var(--soft);margin-top:26px;max-width:56ch}

/* four decisions: a 2x2 decision matrix, not a card grid */
.levers{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));border:1px solid var(--line);border-radius:var(--radius-m);overflow:hidden}
.lever{padding:30px 30px 32px;background:var(--bg)}
.lever:nth-child(1),.lever:nth-child(2){border-bottom:1px solid var(--line)}
.lever:nth-child(odd){border-right:1px solid var(--line)}
.lever h3{display:flex;align-items:center;gap:10px}
.lever h3 .dot{width:10px;height:10px;border-radius:50%;flex:none}
.lever p{color:var(--soft);margin-top:10px;max-width:46ch}
.lever .eg{margin-top:16px;font-size:.93rem;color:var(--muted);max-width:50ch}
.lever .eg .tag{margin-right:8px;vertical-align:1px}
.states{display:flex;flex-wrap:wrap;gap:10px 22px;margin-top:28px;color:var(--muted);font-size:.92rem}
.states .key i{width:10px;height:10px}

/* resilience gauges */
.survive{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:28px;margin-top:8px}
.site h3{font-family:var(--mono);font-weight:500;font-size:1.05rem;letter-spacing:0}
.site .verdict{font-weight:600;margin-top:4px}
.gauge{position:relative;height:12px;background:#1b2c42;border-radius:6px;margin:16px 0 10px}
.gauge .g{position:absolute;inset:0 auto 0 0;border-radius:6px;background:var(--c);width:var(--w)}
.gauge .cap{position:absolute;top:-6px;bottom:-6px;width:2px;background:var(--ink);left:73.5%}
.gauge-scale{display:flex;justify-content:space-between;font-size:.78rem;color:var(--muted)}
.site p.fix{color:var(--soft);font-size:.93rem;margin-top:12px}
.site.bad{--c:var(--red)}.site.bad .verdict{color:#ff9a9a}
.site.tight{--c:var(--amber)}.site.tight .verdict{color:#ffc277}
.site.good{--c:var(--teal)}.site.good .verdict{color:#6fe6c8}

/* SD-WAN */
.sdwan-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.15fr);gap:56px;align-items:center}
.facts{list-style:none;margin:28px 0 0;padding:0;display:grid;gap:20px}
.facts li{padding-left:18px;border-left:2px solid var(--line)}
.facts strong{display:block;font-weight:600;color:var(--ink)}
.facts span{color:var(--muted);font-size:.95rem}
.facts .tag{margin-left:8px;vertical-align:2px}
.topology{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius-m);padding:18px}
.topology figcaption{color:var(--muted);font-size:.85rem;margin-top:10px}
.topology figcaption .tag{margin-right:6px}

/* coming next */
.next{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0;border-top:1px solid var(--line)}
.next article{padding:28px 28px 30px 0;border-bottom:1px solid var(--line)}
.next article:nth-child(even){padding-left:28px;border-left:1px solid var(--line)}
.next h3{display:flex;flex-wrap:wrap;align-items:center;gap:10px}
.next p{color:var(--soft);margin-top:10px;max-width:48ch}
.ask{margin-top:14px;font-family:var(--mono);font-size:.88rem;color:var(--teal);background:var(--bg);border:1px solid var(--line);border-radius:var(--radius-s);padding:10px 12px;max-width:48ch}

/* onboarding: a real sequence, so numbers are earned */
.steps{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:36px;counter-reset:s}
.steps li{counter-increment:s;position:relative;padding-top:56px}
.steps li::before{content:counter(s);position:absolute;top:0;left:0;width:40px;height:40px;border-radius:50%;border:1px solid var(--teal-dim);color:var(--teal);font:600 1.05rem/40px var(--display);text-align:center}
.steps p{color:var(--soft);margin-top:8px}
.aside-note{margin-top:34px;color:var(--muted);max-width:70ch}

/* faq */
.faq{max-width:820px}
.faq details{border-bottom:1px solid var(--line)}
.faq summary{list-style:none;cursor:pointer;padding:22px 40px 22px 0;font:600 1.08rem/1.35 var(--body);position:relative}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";position:absolute;right:4px;top:18px;font:400 1.6rem/1 var(--display);color:var(--teal)}
.faq details[open] summary::after{content:"\2212"}
.faq details p{color:var(--soft);padding:0 0 22px;max-width:64ch}

/* final call */
.final{text-align:left}
.final .wrap{display:grid;grid-template-columns:minmax(0,1.2fr) auto;gap:40px;align-items:end}
.final p{color:var(--soft);margin-top:16px;max-width:56ch}

/* footer */
.site-footer{border-top:1px solid var(--line);padding:36px 0 44px;color:var(--muted);font-size:.9rem}
.site-footer .wrap{display:flex;flex-wrap:wrap;gap:16px 32px;justify-content:space-between;align-items:center}
.site-footer nav{display:flex;flex-wrap:wrap;gap:20px}
.site-footer .footer-learn{flex-basis:100%;gap:8px 20px;font-size:.85rem}
.site-footer a{color:var(--soft);text-decoration:none}
.site-footer a:hover{color:var(--ink)}

/* ---------- restructure (Ravi, 4 Oct): problem, classification, trust strip ---------- */
.eyebrow{font:500 .8rem/1.2 var(--mono,monospace);letter-spacing:.22em;text-transform:uppercase;color:var(--teal);margin:0 0 18px}
.problems{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:0;border-top:1px solid var(--line)}
.problems article{padding:28px 28px 30px 0;border-bottom:1px solid var(--line)}
.problems article+article{padding-left:28px;border-left:1px solid var(--line)}
.problems p{color:var(--soft);margin-top:10px;max-width:40ch}
#classification .split-grid{align-items:start}
#classification .split-figure{margin-top:12px}
.facts-2{grid-template-columns:repeat(2,minmax(0,1fr));gap:24px 40px;margin-top:0}
.trust-strip{padding:44px 0}
.trust-strip ul{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px 40px}
.trust-strip li{color:var(--soft);padding-left:16px;border-left:2px solid var(--teal-dim)}
.trust-strip strong{color:var(--ink);font-weight:600}
.trust-strip p{margin-top:22px;color:var(--muted)}
.trust-strip .founder-note{color:var(--soft)}
.trust-strip .founder-note+p{margin-top:8px}
@media (max-width:820px){
  .problems,.facts-2,.trust-strip ul{grid-template-columns:minmax(0,1fr)}
  .problems article,.problems article+article{padding:24px 0;border-left:0}
}

/* ---------- responsive ---------- */
@media (max-width:1000px){
  .hero .wrap,.split-grid,.sdwan-grid{grid-template-columns:minmax(0,1fr);gap:40px}
  .survive{grid-template-columns:minmax(0,1fr);gap:34px}
  .steps{grid-template-columns:minmax(0,1fr);gap:28px}
  .final .wrap{grid-template-columns:minmax(0,1fr)}
}
@media (max-width:820px){
  .nav{display:none;position:absolute;top:100%;left:0;right:0;flex-direction:column;align-items:flex-start;gap:16px;padding:20px;background:var(--bg);border-bottom:1px solid var(--line)}
  .nav.open{display:flex}
  .menu-toggle{display:inline-block}
  .levers,.next{grid-template-columns:minmax(0,1fr)}
  .lever:nth-child(odd){border-right:0}
  .lever:nth-child(3){border-bottom:1px solid var(--line)}
  .next article,.next article:nth-child(even){padding:26px 0;border-left:0}
  section{padding:70px 0}
  .hero{padding:44px 0 64px}
}
@media (max-width:520px){
  body{font-size:16px}
  .row-head{grid-template-columns:minmax(0,1fr) auto;padding:14px 16px}
  .dirs{grid-column:1/-1;order:3}
  .lever{padding:24px 20px}
  .ledger-foot{padding:12px 16px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .fill{animation:none}
}

/* ---- 45-second demo video (Ravi, 11 Oct): native player, nothing downloads until play ---- */
.demo-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:56px;align-items:center}
.demo-video{margin:0}
.demo-video video{display:block;width:100%;height:auto;aspect-ratio:1/1;border-radius:var(--radius-m);border:1px solid var(--line);background:var(--panel)}
.demo-video figcaption{display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin-top:12px;color:var(--muted);font-size:.9rem}
.demo-points{list-style:none;padding:0;margin:22px 0 0;display:grid;gap:10px}
.demo-points li{padding-left:22px;position:relative;color:var(--soft)}
.demo-points li::before{content:"";position:absolute;left:0;top:.62em;width:8px;height:8px;border-radius:2px;background:var(--teal)}
@media (max-width:820px){.demo-grid{grid-template-columns:minmax(0,1fr);gap:28px}}

/* ---- keep your monitoring tool (Ravi, 11 Oct): a short strip right under the hero ---- */
.keep-strip{padding:0 0 72px}
.keep-strip h2{font-size:clamp(1.45rem,2.3vw,1.85rem);max-width:none;margin-bottom:26px}
.keep-strip ul{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px 40px}
.keep-strip li{color:var(--soft);padding-left:16px;border-left:2px solid var(--teal-dim)}
.keep-strip strong{display:block;color:var(--ink);font-weight:600;margin-bottom:4px}
@media (max-width:820px){.keep-strip{padding:0 0 56px}.keep-strip ul{grid-template-columns:minmax(0,1fr)}}

/* guide pages */
.guide{max-width:780px;margin:0 auto;padding:56px 0 72px}
.guide h1{font-size:clamp(2rem,4vw,2.6rem);margin:10px 0 18px}
.guide h1,.guide h2,.guide h3{max-width:none}
.guide h2{font-size:1.45rem;margin:46px 0 12px}
.guide h3{font-size:1.1rem;margin:26px 0 8px}
.guide p,.guide li{color:var(--soft)}
.guide p{margin:12px 0}
.guide ul,.guide ol{padding-left:22px}
.guide li{margin:8px 0}
.guide code,.guide pre{font-family:var(--mono);font-size:.9em}
.guide pre{background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:14px 16px;overflow-x:auto;color:var(--ink)}
.guide code{background:var(--panel);border:1px solid var(--line);border-radius:5px;padding:1px 5px;color:var(--ink)}
.guide pre code{background:none;border:0;padding:0}
.guide table{width:100%;border-collapse:collapse;margin:14px 0;font-size:.95rem}
.guide th,.guide td{text-align:left;padding:10px 12px;border-bottom:1px solid var(--line);vertical-align:top}
.guide th{color:var(--muted);font-weight:500}
.legend-box{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:14px 18px;margin:22px 0;color:var(--soft)}
.tag-tested{color:#6fe6c8;border-color:var(--teal-dim)}
.tag-untested{color:#ffc277;border-color:#7a5a27;border-style:dashed}
.guide .tag{margin-left:6px;vertical-align:2px}
.crumb{color:var(--muted);font-size:.95rem}.crumb a{color:var(--soft)}
.end{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:22px 24px;margin-top:46px}
@media (max-width:640px){.guide{padding:36px 0 56px}.guide table{font-size:.88rem}.guide th,.guide td{padding:8px 6px}}
.gap-box{border:1px solid #7a5a27;background:rgba(242,165,65,.08);border-radius:12px;padding:14px 18px;margin:6px 0 18px;color:var(--soft)}
.gap-box .tag{margin:0 8px 0 0;vertical-align:1px}
.guide section.faq{padding:0;margin:0;border:0;background:none}
.guide section.related{padding:0;margin:0;border:0;background:none}
/* demo page (Ravi, 11 Oct) */
.demo-page .demo-video{margin:26px 0 8px;max-width:640px}
.demo-page .chapters{list-style:none;padding:0;margin:14px 0 0;display:grid;gap:8px}
.demo-page .chapters button{display:flex;gap:14px;align-items:baseline;width:100%;text-align:left;background:var(--panel);color:var(--soft);border:1px solid var(--line);border-radius:var(--radius-s);padding:12px 14px;font:400 1rem/1.45 var(--body);cursor:pointer}
.demo-page .chapters button:hover{border-color:var(--teal-dim);color:var(--ink)}
.demo-page .chapters b{font-family:var(--mono);font-weight:500;color:var(--teal);flex:none}