/* Epsimo landing page. Palette shared with tools.epsimo.org. */
:root{
  --bg:#080d1a;--bg2:#0d1425;--card:#121a30;--ink:#eef1ff;--muted:#9aa4c7;
  --accent:#5b8cff;--accent2:#8ef0c5;--line:#222c48;--warn:#ffb86b;--err:#ff9c9c;
  --pill:#1b2440;--code:#0a1124;--pre:#070d1c;--on-accent:#04102b;
  --sans:system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  color-scheme:dark;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:76px}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.65 var(--sans);-webkit-font-smoothing:antialiased;overflow-x:hidden}
img,svg{max-width:100%;display:block}
a{color:var(--accent)}
a:hover{color:var(--accent2)}
:focus-visible{outline:2px solid var(--accent2);outline-offset:3px;border-radius:4px}
h1,h2,h3{line-height:1.2;margin:0 0 .5em}
h1{font-size:clamp(2rem,4.6vw,3.2rem);line-height:1.1;letter-spacing:-.02em}
h2{font-size:clamp(1.5rem,3vw,2.1rem);letter-spacing:-.01em}
h3{font-size:1.08rem}
p{margin:0 0 1em}
code{font-family:var(--mono);font-size:.88em;background:var(--code);border:1px solid var(--line);border-radius:6px;padding:.1em .4em}
pre{margin:0;background:var(--pre);border:1px solid var(--line);border-radius:12px;padding:18px;overflow-x:auto;font:13.5px/1.6 var(--mono);color:var(--ink)}
pre code{background:none;border:0;padding:0;font-size:inherit}
.container{max-width:1120px;margin:0 auto;padding:0 20px}
.visually-hidden{position:absolute!important;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:12px;top:-60px;z-index:100;background:var(--accent);color:var(--on-accent);padding:10px 16px;border-radius:9px;font-weight:700;text-decoration:none}
.skip:focus{top:12px}
.muted{color:var(--muted)}
.small{font-size:.9rem}

/* Nav */
.nav{position:sticky;top:0;z-index:50;background:rgba(8,13,26,.88);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.nav .container{display:flex;align-items:center;gap:20px;min-height:62px;flex-wrap:wrap}
.brand{font-weight:800;font-size:1.15rem;color:var(--ink);text-decoration:none;display:inline-flex;align-items:center;gap:9px}
.brand .dot{color:var(--accent)}
.brand svg{width:26px;height:26px}
.nav-links{display:flex;align-items:center;gap:6px 18px;margin:0 0 0 auto;padding:0;list-style:none;flex-wrap:wrap}
.nav-links a{color:var(--muted);text-decoration:none;font-size:.95rem}
.nav-links a:hover{color:var(--ink)}
.nav-links .btn{color:var(--on-accent)}
.nav-toggle{display:none;margin-left:auto;background:var(--pill);color:var(--ink);border:1px solid var(--line);border-radius:9px;padding:7px 12px;font:inherit;font-size:.95rem;cursor:pointer}
@media (max-width:719px){
  html.js .nav-toggle{display:inline-flex;align-items:center;gap:8px}
  html.js .nav-links{display:none;width:100%;flex-direction:column;align-items:flex-start;padding:6px 0 16px;gap:12px}
  html.js .nav.is-open .nav-links{display:flex}
  .nav-links{margin:0;padding-bottom:10px}
}

/* Buttons and pills */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:11px 18px;border-radius:9px;font-weight:700;text-decoration:none;border:1px solid transparent;background:var(--accent);color:var(--on-accent);cursor:pointer;font:inherit;font-weight:700;transition:transform .18s ease,box-shadow .18s ease,background .18s ease}
.btn:hover{color:var(--on-accent);transform:translateY(-2px);box-shadow:0 10px 26px -10px rgba(91,140,255,.7)}
.btn.small{padding:7px 13px;font-size:.9rem}
.btn.ghost{background:transparent;color:var(--ink);border-color:var(--line)}
.btn.ghost:hover{border-color:var(--accent);color:var(--ink);box-shadow:none}
.pill{display:inline-block;background:var(--pill);border:1px solid var(--line);color:var(--ink);border-radius:999px;padding:3px 11px;font-size:.82rem;font-weight:600}
.pill.accent{color:var(--accent2);border-color:rgba(142,240,197,.35)}
.eyebrow{display:inline-flex;align-items:center;gap:8px;background:var(--pill);border:1px solid var(--line);border-radius:999px;padding:5px 13px;font-size:.85rem;color:var(--accent2);font-weight:600;margin-bottom:18px}
.eyebrow::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--accent2);box-shadow:0 0 10px var(--accent2)}
.chips{list-style:none;display:flex;flex-wrap:wrap;gap:6px;margin:0 0 14px;padding:0}
.chips li{background:var(--pill);border-radius:999px;padding:2px 10px;font-size:.78rem;color:var(--ink)}

/* Sections */
section{padding:72px 0;border-bottom:1px solid var(--line)}
.section-head{max-width:720px;margin-bottom:32px}
.section-head p{color:var(--muted);font-size:1.05rem}
.grid{display:grid;gap:18px}
.card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:22px;transition:transform .18s ease,border-color .18s ease,box-shadow .18s ease}
.card:hover{transform:translateY(-4px);border-color:var(--accent);box-shadow:0 18px 40px -22px rgba(91,140,255,.55)}
.card p{color:var(--muted);font-size:.95rem}
.card h3 a{color:var(--ink);text-decoration:none}
.links-row{display:flex;flex-wrap:wrap;gap:12px 22px;margin-top:26px}

/* Hero */
.hero{position:relative;overflow:hidden;padding:88px 0 80px;isolation:isolate}
.hero::before{content:"";position:absolute;inset:-20% -10% auto;height:640px;z-index:-2;background:radial-gradient(1000px 340px at 70% -10%,rgba(91,140,255,.28),transparent 60%),radial-gradient(600px 300px at 10% 30%,rgba(142,240,197,.10),transparent 60%);animation:drift 18s ease-in-out infinite alternate}
.hero::after{content:"";position:absolute;inset:0;z-index:-1;background-image:linear-gradient(rgba(34,44,72,.55) 1px,transparent 1px),linear-gradient(90deg,rgba(34,44,72,.55) 1px,transparent 1px);background-size:48px 48px;-webkit-mask-image:radial-gradient(ellipse 80% 70% at 60% 20%,#000 30%,transparent 75%);mask-image:radial-gradient(ellipse 80% 70% at 60% 20%,#000 30%,transparent 75%);animation:grid-pan 40s linear infinite}
@keyframes drift{0%{transform:translate3d(0,0,0) scale(1)}100%{transform:translate3d(-6%,4%,0) scale(1.08)}}
@keyframes grid-pan{to{background-position:48px 48px,48px 48px}}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:44px;align-items:center}
.lead{font-size:1.12rem;color:var(--muted);max-width:620px}
.cta-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}
.terminal{background:var(--pre);border:1px solid var(--line);border-radius:14px;box-shadow:0 30px 70px -30px rgba(91,140,255,.45);overflow:hidden;min-width:0}
.terminal-bar{display:flex;align-items:center;gap:7px;padding:11px 14px;border-bottom:1px solid var(--line);background:var(--bg2)}
.terminal-bar i{width:11px;height:11px;border-radius:50%;background:#2b3657}
.terminal-bar i:first-child{background:var(--err)}
.terminal-bar i:nth-child(2){background:var(--warn)}
.terminal-bar i:nth-child(3){background:var(--accent2)}
.terminal-bar span{margin-left:8px;font:12px var(--mono);color:var(--muted)}
.terminal pre{border:0;border-radius:0;background:transparent;font-size:13px;white-space:pre-wrap;overflow-wrap:anywhere}
.t-cmd{color:var(--ink)}
.t-key{color:var(--accent)}
.t-str{color:var(--accent2)}
.t-dim{color:var(--muted)}
.caret{display:inline-block;width:8px;height:1.05em;background:var(--accent2);vertical-align:text-bottom;animation:blink 1.1s steps(1) infinite}
@keyframes blink{50%{opacity:0}}
.t-out{opacity:1}
html.js .terminal.is-running .t-out{animation:fade-in .6s ease both;animation-delay:.9s}
@keyframes fade-in{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}

/* Stats */
.stats{padding:40px 0;background:var(--bg2)}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin:0;padding:0;list-style:none}
.stat{text-align:center;padding:10px}
.stat strong{display:block;font-size:clamp(1.8rem,3.4vw,2.5rem);font-weight:800;letter-spacing:-.02em;background:linear-gradient(90deg,var(--ink),var(--accent2));-webkit-background-clip:text;background-clip:text;color:transparent}
.stat span{color:var(--muted);font-size:.95rem}
.stats-note{text-align:center;color:var(--muted);font-size:.9rem;margin:18px 0 0}

/* Two ways */
.two-ways{grid-template-columns:1fr 1fr}
.way{padding:30px;position:relative;overflow:hidden}
.way::before{content:"";position:absolute;inset:0 0 auto;height:3px;background:linear-gradient(90deg,var(--accent),var(--accent2))}
.way .tag{font:600 .8rem var(--mono);color:var(--accent2);text-transform:uppercase;letter-spacing:.08em}
.way h3{font-size:1.4rem;margin-top:6px}
.ticks{list-style:none;padding:0;margin:0 0 20px}
.ticks li{position:relative;padding-left:26px;margin:9px 0;color:var(--muted)}
.ticks li::before{content:"";position:absolute;left:2px;top:.5em;width:12px;height:7px;border-left:2px solid var(--accent2);border-bottom:2px solid var(--accent2);transform:rotate(-45deg)}

/* Actors */
.actors{grid-template-columns:repeat(auto-fill,minmax(250px,1fr))}
.actor{display:flex;flex-direction:column}
.actor-icon{width:48px;height:48px;border-radius:12px;margin-bottom:14px;object-fit:cover}
.actor p{flex:1}
.actor-meta{display:flex;justify-content:space-between;gap:8px;flex-wrap:wrap;font-size:.9rem;color:var(--muted);margin-bottom:14px}
.actor-meta b{color:var(--ink)}
.actor .btn{align-self:flex-start}

/* Flow and pipeline */
.flow{list-style:none;margin:0 0 40px;padding:0;display:grid;grid-template-columns:repeat(4,1fr);gap:18px;counter-reset:step}
.flow li{position:relative;counter-increment:step}
.flow li::before{content:counter(step);display:grid;place-items:center;width:34px;height:34px;border-radius:50%;background:var(--pill);border:1px solid var(--accent);color:var(--accent2);font-weight:800;margin-bottom:12px}
.flow li:not(:last-child)::after{content:"";position:absolute;top:17px;left:46px;right:-10px;height:2px;background:linear-gradient(90deg,var(--accent) 0 40%,var(--line) 40%);background-size:200% 100%;animation:flow-line 2.4s linear infinite}
@keyframes flow-line{from{background-position:100% 0}to{background-position:-100% 0}}
.flow h3{margin-bottom:6px}
.flow p{color:var(--muted);font-size:.95rem;margin:0}
.pipeline{background:var(--bg2);border:1px solid var(--line);border-radius:14px;padding:28px 22px}
.pipe{list-style:none;margin:0;padding:0;display:flex;align-items:stretch;gap:0}
.pipe li{flex:1;display:flex;align-items:center;min-width:0}
.node{flex:1;text-align:center;background:var(--card);border:1px solid var(--line);border-radius:12px;padding:14px 8px;transition:border-color .3s,box-shadow .3s;min-width:0}
.node svg{width:26px;height:26px;margin:0 auto 6px;color:var(--accent2)}
.node b{display:block;font-size:.92rem}
.node code{font-size:.75rem}
.pipe li:not(:last-child)::after{content:"";flex:0 0 26px;height:2px;background:var(--line);position:relative}
.pipe-wire{position:relative;height:6px;margin:20px 6% 0;border-radius:3px;background:var(--line);overflow:hidden}
.pipe-wire::after{content:"";position:absolute;top:0;left:-60px;width:60px;height:6px;border-radius:3px;background:linear-gradient(90deg,transparent,var(--accent2),transparent)}
.pipeline.is-running .pipe-wire::after{animation:travel 6s linear infinite}
@keyframes travel{from{left:-60px}to{left:100%}}
.pipeline.is-running .pipe li:nth-child(1) .node{animation:light 6s infinite 0s}
.pipeline.is-running .pipe li:nth-child(2) .node{animation:light 6s infinite 1.2s}
.pipeline.is-running .pipe li:nth-child(3) .node{animation:light 6s infinite 2.4s}
.pipeline.is-running .pipe li:nth-child(4) .node{animation:light 6s infinite 3.6s}
.pipeline.is-running .pipe li:nth-child(5) .node{animation:light 6s infinite 4.8s}
@keyframes light{0%,22%{border-color:var(--line);box-shadow:none}6%,14%{border-color:var(--accent2);box-shadow:0 0 0 3px rgba(142,240,197,.15),0 0 24px -4px rgba(142,240,197,.5)}}
.pipeline figcaption{margin-top:18px;text-align:center;color:var(--muted)}

/* Functions */
.functions{grid-template-columns:repeat(auto-fill,minmax(240px,1fr))}
.fn-top{display:flex;flex-direction:column;align-items:flex-start;gap:8px;margin-bottom:10px}
.fn-top h3{margin:0}
.fn code{display:inline-block;margin-bottom:10px}
.fn .pill{white-space:nowrap}

/* Code tabs */
.tabs{background:var(--bg2);border:1px solid var(--line);border-radius:14px;overflow:hidden}
.tablist{display:flex;gap:4px;padding:8px;border-bottom:1px solid var(--line);flex-wrap:wrap}
.tab{background:transparent;border:1px solid transparent;color:var(--muted);font:600 .95rem var(--sans);padding:8px 16px;border-radius:9px;cursor:pointer}
.tab:hover{color:var(--ink)}
.tab[aria-selected="true"]{background:var(--pill);color:var(--ink);border-color:var(--line)}
.panel{padding:18px;position:relative}
.panel h3{font-size:.95rem;color:var(--muted);font-weight:600;margin:0 0 10px}
.panel pre+h3{margin-top:18px}
html.js .panel[hidden]{display:none}
html:not(.js) .tablist{display:none}
.copy{position:absolute;top:13px;right:18px;background:var(--pill);color:var(--ink);border:1px solid var(--line);border-radius:7px;padding:4px 10px;font:600 .8rem var(--sans);cursor:pointer}
.copy:hover{border-color:var(--accent)}
html:not(.js) .copy{display:none}
.tool-list{display:flex;flex-wrap:wrap;gap:6px;list-style:none;padding:0;margin:14px 0 0}

/* Pricing */
.pricing{grid-template-columns:repeat(4,1fr)}
.price{text-align:left}
.price .amount{font-size:2rem;font-weight:800;letter-spacing:-.02em;margin:4px 0}
.price.featured{border-color:var(--accent);background:linear-gradient(180deg,rgba(91,140,255,.14),var(--card) 60%)}
.note{color:var(--muted);margin-top:22px}

/* Use cases */
.uses{grid-template-columns:repeat(4,1fr)}
.use svg{width:34px;height:34px;color:var(--accent);margin-bottom:12px}

/* FAQ */
.faq{max-width:820px}
.faq details{background:var(--card);border:1px solid var(--line);border-radius:12px;margin-bottom:10px}
.faq summary{cursor:pointer;padding:16px 46px 16px 18px;font-weight:600;list-style:none;position:relative}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";position:absolute;right:18px;top:12px;font-size:1.3rem;color:var(--accent2);transition:transform .2s}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq details p{padding:0 18px 16px;margin:0;color:var(--muted)}

/* Contact and footer */
.contact{text-align:center;border-bottom:0;background:radial-gradient(700px 260px at 50% 0,rgba(91,140,255,.16),transparent 70%)}
.contact p{color:var(--muted);font-size:1.08rem;max-width:640px;margin:0 auto 24px}
footer{border-top:1px solid var(--line);padding:44px 0 56px;color:var(--muted);font-size:.92rem}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:24px}
footer h2{font-size:.95rem;color:var(--ink);margin-bottom:10px}
footer ul{list-style:none;margin:0;padding:0}
footer li{margin:6px 0}
footer a{color:var(--muted)}
footer a:hover{color:var(--ink)}
.foot-note{margin-top:30px;padding-top:18px;border-top:1px solid var(--line)}

/* 404 */
.notfound{min-height:60vh;display:grid;place-items:center;text-align:center;border:0}

/* Scroll reveal (only when JS runs) */
html.js .reveal{opacity:0;transform:translateY(18px);transition:opacity .6s ease,transform .6s ease;transition-delay:var(--d,0ms)}
html.js .reveal.is-visible{opacity:1;transform:none}
.grid>.reveal:nth-child(2){--d:70ms}
.grid>.reveal:nth-child(3){--d:140ms}
.grid>.reveal:nth-child(4){--d:210ms}
.grid>.reveal:nth-child(5){--d:280ms}
.grid>.reveal:nth-child(6){--d:350ms}
.grid>.reveal:nth-child(7){--d:420ms}
.grid>.reveal:nth-child(8){--d:490ms}

/* Responsive */
@media (max-width:1023px){
  .hero-grid{grid-template-columns:1fr}
  .stats-grid,.pricing,.uses{grid-template-columns:repeat(2,1fr)}
  .flow{grid-template-columns:repeat(2,1fr)}
  .flow li:nth-child(2)::after{display:none}
  .foot-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:719px){
  section{padding:56px 0}
  .hero{padding:56px 0}
  .two-ways,.flow{grid-template-columns:1fr}
  .flow li::after{display:none}
  .pipe{flex-direction:column;gap:0}
  .pipe li{flex-direction:column;align-items:stretch}
  .pipe li:not(:last-child)::after{flex:0 0 18px;width:2px;height:18px;margin:0 auto}
  .pipe-wire{display:none}
  .terminal pre{font-size:12px}
}
@media (max-width:479px){
  .stats-grid,.pricing,.uses,.foot-grid{grid-template-columns:1fr}
  .cta-row .btn{width:100%}
}

/* Reduced motion: no animation, everything visible */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation:none!important;transition:none!important}
  html.js .reveal{opacity:1;transform:none}
  .card:hover,.btn:hover{transform:none}
}