/* Context Controller — shared styles. Dark SaaS, indigo→cyan signature gradient. */
:root{
  --bg:#070b16;
  --bg-2:#0b1122;
  --panel:rgba(255,255,255,.04);
  --panel-2:rgba(255,255,255,.06);
  --line:rgba(148,163,255,.16);
  --text:#e8edf7;
  --muted:#9aa6c2;
  --muted-2:#6b7691;
  --indigo:#6366f1;
  --cyan:#22d3ee;
  --violet:#a78bfa;
  --green:#34d399;
  --amber:#fbbf24;
  --rose:#fb7185;
  --grad:linear-gradient(135deg,#6366f1 0%,#22d3ee 100%);
  --radius:16px;
  --font:"Inter",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  --mono:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--text);font-family:var(--font);
  font-size:16.5px;line-height:1.65;-webkit-font-smoothing:antialiased;
}
body::before{
  content:"";position:fixed;inset:0;z-index:-1;pointer-events:none;
  background:
    radial-gradient(900px 420px at 12% -4%, rgba(99,102,241,.22), transparent 60%),
    radial-gradient(800px 380px at 88% 6%, rgba(34,211,238,.14), transparent 60%),
    radial-gradient(700px 500px at 50% 110%, rgba(99,102,241,.10), transparent 60%),
    var(--bg);
}
a{color:var(--cyan)}
h1,h2,h3,h4{line-height:1.18;letter-spacing:-.02em;margin:0 0 .6em}
h1{font-size:clamp(2.4rem,5vw,3.9rem);font-weight:800}
h2{font-size:clamp(1.7rem,3.4vw,2.5rem);font-weight:750}
h3{font-size:1.25rem;font-weight:700}
p{margin:0 0 1em}
.wrap{max-width:1140px;margin:0 auto;padding:0 24px}
section{padding:88px 0}
.section-label{display:inline-block;font-size:.78rem;font-weight:700;letter-spacing:.14em;text-transform:uppercase;
  background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;margin-bottom:12px}
.lede{color:var(--muted);font-size:1.15rem;max-width:640px}
.grad-text{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
::selection{background:rgba(99,102,241,.45)}

/* Header */
.site-header{position:sticky;top:0;z-index:50;backdrop-filter:blur(14px);
  background:rgba(7,11,22,.72);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:68px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--text);font-weight:800;font-size:1.05rem}
.brand-mark{width:32px;height:32px;border-radius:9px;background:var(--grad);
  display:grid;place-items:center;box-shadow:0 4px 18px rgba(99,102,241,.5)}
.nav-links{display:flex;gap:6px;align-items:center}
.nav-links a{color:var(--muted);text-decoration:none;font-size:.95rem;font-weight:550;padding:8px 12px;border-radius:10px}
.nav-links a:hover,.nav-links a.active{color:var(--text);background:var(--panel-2)}
.nav-cta{display:flex;gap:10px;align-items:center}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;cursor:pointer;border:0;border-radius:12px;
  padding:12px 22px;font-weight:700;font-size:.98rem;text-decoration:none;transition:transform .15s ease, box-shadow .15s ease, background .15s ease}
.btn-primary{background:var(--grad);color:#fff;box-shadow:0 6px 24px rgba(99,102,241,.4)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 10px 30px rgba(34,211,238,.35)}
.btn-ghost{background:var(--panel-2);color:var(--text);border:1px solid var(--line)}
.btn-ghost:hover{background:rgba(255,255,255,.1)}
.btn-sm{padding:8px 16px;font-size:.88rem}
.hamburger{display:none;background:none;border:1px solid var(--line);border-radius:10px;color:var(--text);
  padding:8px 12px;cursor:pointer;font-size:1.1rem}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:6px}

/* Hero */
.hero{padding:110px 0 80px;text-align:center;position:relative}
.hero .lede{margin:0 auto 32px}
.hero-cta{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;margin-bottom:20px}
.hero-note{color:var(--muted-2);font-size:.9rem}
.hero-shell{margin-top:56px;text-align:left}
.term{background:rgba(10,15,30,.85);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:0 24px 70px rgba(0,0,0,.5);overflow:hidden}
.term-bar{display:flex;gap:8px;padding:12px 16px;border-bottom:1px solid var(--line);align-items:center}
.term-bar i{width:11px;height:11px;border-radius:50%;background:#3a4358;display:block}
.term-bar i:nth-child(1){background:#fb7185}.term-bar i:nth-child(2){background:#fbbf24}.term-bar i:nth-child(3){background:#34d399}
.term-title{margin-left:8px;color:var(--muted-2);font-size:.82rem;font-family:var(--mono)}
.term-body{padding:26px;font-family:var(--mono);font-size:.88rem;line-height:1.8;overflow-x:auto}
.tok-sys{color:var(--violet)}.tok-usr{color:var(--cyan)}.tok-tool{color:var(--amber)}.tok-ok{color:var(--green)}
.tok-dim{color:var(--muted-2)}

/* Logos */
.logos{padding:36px 0;text-align:center;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.logos p{color:var(--muted-2);font-size:.82rem;letter-spacing:.12em;text-transform:uppercase;margin-bottom:22px}
.logo-row{display:flex;flex-wrap:wrap;gap:14px 42px;justify-content:center;color:var(--muted-2);
  font-weight:700;font-size:1.02rem;letter-spacing:.02em}
.logo-row span{display:flex;align-items:center;gap:8px}
.logo-row svg{width:20px;height:20px;opacity:.6}

/* Cards & grids */
.grid{display:grid;gap:22px}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:30px;
  backdrop-filter:blur(8px);transition:transform .18s ease,border-color .18s ease}
.card:hover{transform:translateY(-4px);border-color:rgba(34,211,238,.35)}
.card .icon{width:46px;height:46px;border-radius:13px;background:var(--grad);display:grid;place-items:center;
  margin-bottom:18px;font-size:1.3rem;box-shadow:0 6px 20px rgba(99,102,241,.4)}
.card h3{margin-bottom:.4em}
.card p{color:var(--muted);font-size:.98rem;margin:0}
.center{text-align:center}
.section-head{max-width:680px;margin:0 auto 52px;text-align:center}
.section-head .lede{margin:0 auto}

/* Steps */
.step{display:flex;gap:22px;align-items:flex-start}
.step-num{flex:0 0 52px;height:52px;border-radius:50%;background:var(--grad);display:grid;place-items:center;
  font-weight:800;font-size:1.15rem;box-shadow:0 6px 20px rgba(99,102,241,.4)}

/* Testimonials */
.quote{font-size:1.02rem;color:var(--text)}
.quote-by{margin-top:18px;color:var(--muted);font-size:.92rem}
.quote-by strong{color:var(--text)}
.stars{color:var(--amber);letter-spacing:.2em;margin-bottom:12px}
.illus-note{font-size:.8rem;color:var(--muted-2);margin-top:30px}

/* CTA band */
.cta-band{background:linear-gradient(135deg,rgba(99,102,241,.22),rgba(34,211,238,.14));
  border:1px solid var(--line);border-radius:22px;padding:64px 40px;text-align:center;margin:88px 0}

/* Pricing */
.billing-toggle{display:flex;align-items:center;justify-content:center;gap:14px;margin-bottom:44px;font-weight:600}
.switch{position:relative;width:56px;height:30px;background:var(--panel-2);border:1px solid var(--line);
  border-radius:999px;cursor:pointer}
.switch::after{content:"";position:absolute;top:3px;left:4px;width:22px;height:22px;border-radius:50%;
  background:var(--grad);transition:left .18s ease}
.switch[aria-checked="true"]::after{left:28px}
.price-card{position:relative}
.price-card.popular{border-color:rgba(34,211,238,.55);box-shadow:0 0 0 1px rgba(34,211,238,.35),0 20px 60px rgba(99,102,241,.25)}
.pop-badge{position:absolute;top:-14px;left:50%;transform:translateX(-50%);background:var(--grad);
  color:#fff;font-size:.75rem;font-weight:800;letter-spacing:.08em;padding:5px 16px;border-radius:999px;text-transform:uppercase}
.price{font-size:2.6rem;font-weight:800;letter-spacing:-.03em}
.price small{font-size:1rem;color:var(--muted);font-weight:500}
.check-list{list-style:none;padding:0;margin:22px 0}
.check-list li{padding:7px 0 7px 30px;position:relative;color:var(--muted);font-size:.96rem}
.check-list li::before{content:"✓";position:absolute;left:4px;color:var(--green);font-weight:800}
.compare{width:100%;border-collapse:collapse;margin-top:40px;font-size:.94rem}
.compare th,.compare td{padding:13px 12px;border-bottom:1px solid var(--line);text-align:left}
.compare th{color:var(--text);font-weight:700}
.compare td{color:var(--muted)}
.compare td.y{color:var(--green);font-weight:700}.compare td.n{color:var(--muted-2)}
.faq-item{border:1px solid var(--line);border-radius:12px;margin-bottom:12px;background:var(--panel);overflow:hidden}
.faq-q{width:100%;background:none;border:0;color:var(--text);font-family:var(--font);font-size:1.02rem;font-weight:650;
  padding:18px 22px;display:flex;justify-content:space-between;align-items:center;cursor:pointer;text-align:left}
.faq-q .chev{transition:transform .2s;color:var(--cyan)}
.faq-item.open .faq-q .chev{transform:rotate(180deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .28s ease;color:var(--muted);font-size:.96rem}
.faq-a-inner{padding:0 22px 20px}

/* Demo */
.demo-layout{display:grid;grid-template-columns:380px 1fr;gap:26px;align-items:start}
.demo-panel{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:26px;backdrop-filter:blur(8px)}
.demo-panel h3{font-size:1.05rem;margin-bottom:16px}
.field{margin-bottom:18px}
.field label{display:block;font-size:.86rem;font-weight:650;color:var(--muted);margin-bottom:8px}
.field select,.field textarea,.field input[type=text]{width:100%;background:rgba(0,0,0,.3);border:1px solid var(--line);
  border-radius:10px;color:var(--text);padding:11px 13px;font-family:var(--font);font-size:.94rem}
.field textarea{min-height:84px;resize:vertical}
.field select:focus,.field textarea:focus,.field input:focus{border-color:var(--cyan);outline:none}
input[type=range]{width:100%;accent-color:var(--cyan);height:32px}
.range-stops{display:flex;justify-content:space-between;font-size:.78rem;color:var(--muted-2);font-family:var(--mono)}
.preset-chips{display:flex;flex-wrap:wrap;gap:8px}
.chip{background:var(--panel-2);border:1px solid var(--line);color:var(--text);border-radius:999px;
  padding:7px 14px;font-size:.84rem;cursor:pointer;font-weight:600}
.chip:hover{border-color:var(--cyan);color:var(--cyan)}
.token-est{font-size:.82rem;color:var(--muted-2);font-family:var(--mono)}
.context-track{position:relative;height:64px;border-radius:14px;background:rgba(0,0,0,.35);
  border:1px solid var(--line);overflow:hidden;display:flex}
.seg{height:100%;transition:width .5s cubic-bezier(.4,0,.2,1),opacity .4s}
.seg-sys{background:linear-gradient(180deg,#a78bfa,#7c3aed)}
.seg-usr{background:linear-gradient(180deg,#22d3ee,#0891b2)}
.seg-ast{background:linear-gradient(180deg,#818cf8,#4f46e5)}
.seg-tool{background:linear-gradient(180deg,#fbbf24,#b45309)}
.seg-evict{opacity:.18}
.stat-row{display:flex;gap:18px;flex-wrap:wrap;margin:18px 0}
.stat{flex:1;min-width:120px;background:rgba(0,0,0,.28);border:1px solid var(--line);border-radius:12px;padding:14px 16px}
.stat .k{font-size:.75rem;color:var(--muted-2);text-transform:uppercase;letter-spacing:.1em;margin-bottom:4px}
.stat .v{font-size:1.35rem;font-weight:800;font-family:var(--mono)}
.msg-list{max-height:340px;overflow-y:auto;display:flex;flex-direction:column;gap:10px;margin-top:18px}
.msg{border:1px solid var(--line);border-radius:12px;padding:12px 14px;background:rgba(0,0,0,.22);font-size:.9rem}
.msg-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:6px;font-size:.78rem}
.msg-type{font-weight:800;text-transform:uppercase;letter-spacing:.1em;font-size:.7rem;padding:3px 10px;border-radius:999px}
.mt-system{background:rgba(167,139,250,.18);color:var(--violet)}
.mt-user{background:rgba(34,211,238,.15);color:var(--cyan)}
.mt-assistant{background:rgba(129,140,248,.18);color:#a5b4fc}
.mt-tool{background:rgba(251,191,36,.15);color:var(--amber)}
.msg-tokens{color:var(--muted-2);font-family:var(--mono)}
.msg.compacted{border-color:rgba(52,211,153,.5)}
.msg.evicted{opacity:.35;border-style:dashed}
.msg.evicted .msg-body{text-decoration:line-through}
.compact-summary{background:rgba(52,211,153,.08);border:1px solid rgba(52,211,153,.3);border-radius:12px;
  padding:16px 18px;margin-top:18px;font-size:.92rem}
.compact-summary dl{display:grid;grid-template-columns:1fr 1fr;gap:6px 18px;margin:10px 0 0}
.compact-summary dt{color:var(--muted-2);font-size:.8rem}
.compact-summary dd{margin:0;font-family:var(--mono);font-weight:700}
.legend{display:flex;gap:16px;flex-wrap:wrap;font-size:.8rem;color:var(--muted);margin-top:12px}
.legend i{width:12px;height:12px;border-radius:4px;display:inline-block;margin-right:6px}

.compacted-seg{filter:saturate(.75) brightness(1.12)}
.over-cap{border-color:var(--rose)!important;box-shadow:0 0 0 1px var(--rose)}
.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}

/* Docs */
.docs-layout{display:grid;grid-template-columns:240px 1fr;gap:40px;align-items:start}
.docs-nav{position:sticky;top:92px;border:1px solid var(--line);border-radius:14px;background:var(--panel);padding:18px}
.docs-nav a{display:block;color:var(--muted);text-decoration:none;font-size:.9rem;padding:8px 10px;border-radius:8px}
.docs-nav a:hover,.docs-nav a.active{color:var(--cyan);background:rgba(34,211,238,.08)}
.docs-nav strong{font-size:.75rem;text-transform:uppercase;letter-spacing:.1em;color:var(--muted-2);padding:8px 10px;display:block}
.code-block{background:#0a0f20;border:1px solid var(--line);border-radius:12px;overflow:hidden;margin:18px 0}
.code-head{display:flex;justify-content:space-between;align-items:center;padding:10px 16px;border-bottom:1px solid var(--line);
  font-size:.78rem;color:var(--muted-2);font-family:var(--mono)}
.code-head button{background:var(--panel-2);border:1px solid var(--line);color:var(--text);border-radius:8px;
  padding:5px 12px;font-size:.76rem;cursor:pointer;font-family:var(--mono)}
.code-head button:hover{border-color:var(--cyan);color:var(--cyan)}
.code-block pre{margin:0;padding:18px;overflow-x:auto;font-family:var(--mono);font-size:.85rem;line-height:1.7;color:#cdd6f4}
.c-k{color:#c792ea}.c-s{color:#a5e075}.c-c{color:#5b6478;font-style:italic}.c-f{color:#82aaff}.c-n{color:#f78c6c}.c-b{color:#ffcb6b}
table.api{width:100%;border-collapse:collapse;font-size:.92rem;margin:16px 0}
table.api th,table.api td{border:1px solid var(--line);padding:11px 14px;text-align:left;vertical-align:top}
table.api th{background:rgba(99,102,241,.12);font-weight:700}
table.api td{color:var(--muted)}
table.api code{color:var(--cyan);font-family:var(--mono);font-size:.84em}
.glossary dt{color:var(--text);font-weight:700;margin-top:18px}
.glossary dd{color:var(--muted);margin:6px 0 0}

/* Forms */
.form-card{max-width:640px;margin:0 auto;background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:38px}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.form-err{color:var(--rose);font-size:.84rem;margin-top:6px;display:none}
.field.invalid input,.field.invalid textarea,.field.invalid select{border-color:var(--rose)}
.field.invalid .form-err{display:block}
.form-success{display:none;text-align:center;padding:40px 10px}
.form-success.show{display:block}
.success-ring{width:72px;height:72px;border-radius:50%;background:rgba(52,211,153,.15);border:2px solid var(--green);
  display:grid;place-items:center;font-size:2rem;margin:0 auto 20px;color:var(--green)}

/* Footer */
footer{border-top:1px solid var(--line);padding:60px 0 30px;margin-top:40px;background:rgba(5,8,17,.6)}
.foot-grid{display:grid;grid-template-columns:1.4fr repeat(3,1fr);gap:32px;margin-bottom:44px}
.foot-grid h4{font-size:.85rem;text-transform:uppercase;letter-spacing:.1em;color:var(--muted-2);margin-bottom:16px}
.foot-grid a{display:block;color:var(--muted);text-decoration:none;font-size:.93rem;padding:5px 0}
.foot-grid a:hover{color:var(--cyan)}
.foot-bottom{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:12px;
  padding-top:24px;border-top:1px solid var(--line);color:var(--muted-2);font-size:.85rem}
.status-dot{display:inline-block;width:8px;height:8px;border-radius:50%;background:var(--green);margin-right:6px;
  box-shadow:0 0 8px var(--green)}

/* Team */
.avatar{width:84px;height:84px;border-radius:50%;background:var(--grad);display:grid;place-items:center;
  font-weight:800;font-size:1.5rem;margin-bottom:16px;color:#fff}

.skip-link{position:absolute;left:-9999px;top:0;background:var(--indigo);color:#fff;padding:10px 18px;border-radius:0 0 10px 0;z-index:100}
.skip-link:focus{left:0}

@media (max-width:900px){
  .grid-3,.grid-4{grid-template-columns:repeat(2,1fr)}
  .demo-layout,.docs-layout{grid-template-columns:1fr}
  .docs-nav{position:static}
  .foot-grid{grid-template-columns:1fr 1fr}
  .nav-links{display:none;position:absolute;top:68px;left:0;right:0;flex-direction:column;align-items:stretch;
    background:rgba(7,11,22,.97);padding:16px 24px 24px;border-bottom:1px solid var(--line)}
  .nav-links.open{display:flex}
  .hamburger{display:block}
}
@media (max-width:600px){
  .grid-2,.grid-3,.grid-4{grid-template-columns:1fr}
  .form-row{grid-template-columns:1fr}
  section{padding:60px 0}
  .hero{padding:80px 0 60px}
  .compact-summary dl{grid-template-columns:1fr}
}