/* Keryn — documentation-first site. Original Ma11AI design. */
:root{
  --text-xs:.8125rem;--text-sm:.9375rem;--text-base:1.0625rem;--text-lg:1.25rem;--text-xl:1.5rem;--text-2xl:2.125rem;
  --text-hero:clamp(2.6rem,1.6rem + 3.6vw,4.4rem);
  --s1:.25rem;--s2:.5rem;--s3:.75rem;--s4:1rem;--s5:1.25rem;--s6:1.5rem;--s8:2rem;--s10:2.5rem;--s12:3rem;--s16:4rem;
  --font-body:'Geist','Segoe UI',system-ui,sans-serif;--font-mono:'Geist Mono','JetBrains Mono',ui-monospace,monospace;
  --radius:10px;--header:68px;
  /* light (docs default) */
  --bg:#ffffff;--bg-2:#f6f8f6;--surface:#ffffff;--line:#e3e8e4;--line-2:#cfd7d1;
  --ink:#0d1311;--ink-2:#3a4540;--muted:#69756f;
  --accent:#0c8a60;--accent-strong:#08734f;--accent-soft:#e6f5ee;--accent-ink:#ffffff;
  --note-bg:#effaf4;--note-line:#bfe6d2;--note-ink:#0b5a40;
  --warn-bg:#fff8e8;--warn-line:#f0d9a2;--warn-ink:#7a5200;
  --code-bg:#0f1513;--code-ink:#e4ebe7;--code-dim:#7f8c86;
  --shadow:0 1px 2px rgba(13,19,17,.05),0 8px 24px rgba(13,19,17,.06);
}
[data-theme=dark]{
  --bg:#0c100f;--bg-2:#111715;--surface:#121816;--line:#212b28;--line-2:#2d3a36;
  --ink:#e6ece8;--ink-2:#b3bfb9;--muted:#7d8a84;
  --accent:#3fd19c;--accent-strong:#5fe0b0;--accent-soft:rgba(63,209,156,.12);--accent-ink:#04110b;
  --note-bg:rgba(63,209,156,.07);--note-line:rgba(63,209,156,.28);--note-ink:#9fe9c9;
  --warn-bg:rgba(240,180,76,.08);--warn-line:rgba(240,180,76,.3);--warn-ink:#f2c879;
  --code-bg:#080b0a;--shadow:0 10px 30px rgba(0,0,0,.35);
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-padding-top:calc(var(--header) + 16px)}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--font-body);font-size:var(--text-base);line-height:1.65;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
html[data-lang=en] [lang=ro]:not(html),html[data-lang=ro] [lang=en]:not(html){display:none!important}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline;text-underline-offset:3px}
code,pre,kbd,.mono{font-family:var(--font-mono)}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px}
.skip{position:absolute;left:-9999px}.skip:focus{left:1rem;top:1rem;background:var(--accent);color:var(--accent-ink);padding:.5rem 1rem;z-index:200}
.wrap{max-width:1320px;margin:0 auto;padding:0 clamp(1rem,2.6vw,2rem)}

/* header */
.top{position:sticky;top:0;z-index:60;height:var(--header);background:color-mix(in srgb,var(--bg) 92%,transparent);backdrop-filter:saturate(1.4) blur(10px);border-bottom:1px solid var(--line)}
.top .wrap{display:flex;align-items:center;gap:var(--s5);height:100%}
.brand{display:flex;align-items:center;gap:.6rem;color:var(--ink);flex-shrink:0}
.brand:hover{text-decoration:none}
.brand svg{width:30px;height:30px;color:var(--accent)}
.brand b{font-weight:600;font-size:1.3rem;letter-spacing:.14em}
.ver{font:500 .75rem/1 var(--font-mono);color:var(--muted);border:1px solid var(--line-2);border-radius:999px;padding:.3rem .55rem;white-space:nowrap}
.search-btn{flex:1;max-width:420px;margin:0 auto;display:flex;align-items:center;gap:.6rem;height:42px;padding:0 .9rem;border:1px solid var(--line-2);border-radius:10px;background:var(--bg);color:var(--muted);font:inherit;font-size:var(--text-sm);cursor:pointer}
.search-btn:hover{border-color:var(--accent)}
.search-btn kbd{margin-left:auto;font-size:.75rem;color:var(--muted)}
.ctrl{display:flex;gap:.5rem;align-items:center;flex-shrink:0}
.seg{display:flex;border:1px solid var(--line-2);border-radius:8px;overflow:hidden}
.seg button,.icon-btn{background:transparent;color:var(--ink-2);border:0;font:500 .75rem/1 var(--font-mono);padding:0 .65rem;height:36px;cursor:pointer}
.seg button[aria-pressed=true]{background:var(--accent-soft);color:var(--accent)}
.icon-btn{border:1px solid var(--line-2);border-radius:8px;width:36px;display:grid;place-items:center;padding:0}
.icon-btn:hover,.seg button:hover{color:var(--ink)}
.menu-btn{display:none}

/* hero band */
.hero{position:relative;overflow:hidden;color:#e9efeb;background:
  radial-gradient(900px 520px at 78% 30%,rgba(63,209,156,.16),transparent 60%),
  radial-gradient(700px 400px at 10% 0%,rgba(63,209,156,.07),transparent 60%),
  linear-gradient(180deg,#0b1210 0%,#0d1714 100%)}
.hero .net{position:absolute;inset:0;width:100%;height:100%;opacity:.55;pointer-events:none}
.hero .wrap{position:relative;display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.05fr);gap:clamp(2rem,4vw,4rem);padding-top:clamp(3rem,6vw,5.5rem);padding-bottom:clamp(3rem,6vw,5rem);align-items:start}
.hero h1{font-size:var(--text-hero);line-height:1.02;font-weight:500;letter-spacing:-.035em;margin:0 0 1.25rem;color:#3fd19c;background:linear-gradient(90deg,#7ff0c4,#3fd19c 45%,#1fae7c);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.hero .lede{font-size:clamp(1.2rem,1rem + .8vw,1.6rem);line-height:1.45;color:#c9d4ce;margin:0 0 1.5rem;max-width:34ch}
.hero .lede b{color:#fff;font-weight:600}
.hero .lede em{color:#7ff0c4;font-style:italic}
.chips{display:flex;flex-wrap:wrap;gap:.5rem;margin:0 0 1.6rem;padding:0;list-style:none}
.chips li{display:flex;align-items:center;gap:.45rem;font-size:.9rem;color:#dfe8e3;border:1px solid rgba(255,255,255,.14);background:rgba(255,255,255,.04);border-radius:999px;padding:.4rem .8rem}
.chips svg{width:15px;height:15px;color:#3fd19c}
.hero .sub{color:#aab7b0;font-size:1.05rem;margin:0 0 1.6rem;max-width:44ch}
.hero .sub b{color:#fff}
.cta{display:flex;flex-wrap:wrap;gap:.75rem;align-items:center;margin-bottom:.9rem}
.btn{display:inline-flex;align-items:center;gap:.5rem;height:46px;padding:0 1.15rem;border-radius:999px;font-weight:600;font-size:.98rem;border:1px solid transparent;cursor:pointer}
.btn:hover{text-decoration:none}
.btn-primary{background:#3fd19c;color:#04110b}.btn-primary:hover{background:#5fe0b0}
.btn-ghost{background:rgba(255,255,255,.07);color:#fff;border-color:rgba(255,255,255,.12)}.btn-ghost:hover{background:rgba(255,255,255,.12)}
.hero .fine{color:#8b9a93;font-size:.92rem;margin:0 0 2rem}
.inst{margin:0 0 1rem}
.inst .lbl{font:600 .72rem/1 var(--font-body);letter-spacing:.09em;text-transform:uppercase;color:#8b9a93;margin:0 0 .45rem}
.inst .box{display:flex;align-items:flex-start;gap:.6rem;background:rgba(0,0,0,.35);border:1px solid rgba(255,255,255,.1);border-radius:10px;padding:.7rem .85rem;font:500 .9rem/1.5 var(--font-mono);color:#e9efeb}
.inst .box .p{color:#3fd19c}
.inst .box .t{flex:1;word-break:break-word}
.copy{margin-left:auto;background:none;border:0;color:#8b9a93;font:500 .75rem var(--font-mono);cursor:pointer;padding:0 .2rem}
.copy:hover{color:#fff}
.term{position:relative;align-self:center;border-radius:16px;background:#0a0f0d;border:1px solid rgba(63,209,156,.28);box-shadow:0 0 0 1px rgba(0,0,0,.4),0 30px 80px rgba(0,0,0,.55),0 0 120px rgba(63,209,156,.12);overflow:hidden}
.term-bar{display:flex;align-items:center;gap:.4rem;padding:.75rem .9rem;border-bottom:1px solid rgba(255,255,255,.06)}
.term-bar i{width:11px;height:11px;border-radius:50%;border:1px solid rgba(255,255,255,.25)}
.term-bar span{margin-left:.6rem;font:500 .75rem var(--font-mono);color:#7d8a84}
.term pre{margin:0;padding:1rem 1.1rem 1.2rem;height:420px;overflow:hidden;font:400 .8rem/1.55 var(--font-mono);color:#d7e2dc;white-space:pre-wrap;word-break:break-word}
.term .c{color:#3fd19c}.term .d{color:#71807a}.term .o{color:#7ff0c4}.term .w{color:#f2c879}.term .cur{display:inline-block;width:.55em;height:1.05em;background:#3fd19c;vertical-align:-.15em;animation:blink 1s steps(1) infinite}
@keyframes blink{50%{opacity:0}}
.term-cap{font:500 .78rem var(--font-mono);color:#7d8a84;margin:.8rem .2rem 0}
.term-cap a{color:#7ff0c4}

/* docs layout */
.docs{display:grid;grid-template-columns:250px minmax(0,1fr) 210px;gap:clamp(1.5rem,3vw,3rem);align-items:start}
.side{position:sticky;top:var(--header);height:calc(100vh - var(--header));overflow:auto;padding:2rem 1rem 3rem 0;border-right:1px solid var(--line);background:var(--bg-2);margin-left:calc(-1 * clamp(1rem,2.6vw,2rem));padding-left:clamp(1rem,2.6vw,2rem)}
.side h4{font-size:.9rem;font-weight:600;color:var(--ink);margin:1.6rem 0 .5rem}
.side h4:first-child{margin-top:0}
.side ul{list-style:none;margin:0;padding:0 0 0 .1rem;border-left:1px solid var(--line-2)}
.side a{display:block;color:var(--ink-2);font-size:.92rem;padding:.38rem 0 .38rem 1rem;margin-left:-1px;border-left:2px solid transparent}
.side a:hover{color:var(--ink);text-decoration:none}
.side a[aria-current=page]{color:var(--accent);border-left-color:var(--accent);font-weight:500}
.content{padding:2.5rem 0 4rem;min-width:0}
.content .eyebrow{font-size:.9rem;font-weight:500;color:var(--accent);margin:0 0 .4rem}
.content h1{font-size:var(--text-2xl);line-height:1.15;font-weight:500;letter-spacing:-.025em;margin:0 0 1rem}
.content .lead{font-size:1.28rem;line-height:1.55;color:var(--muted);margin:0 0 2rem;max-width:62ch}
.content h2{font-size:1.55rem;font-weight:500;letter-spacing:-.015em;line-height:1.25;margin:2.8rem 0 .9rem;padding-top:.2rem}
.content h3{font-size:1.15rem;font-weight:600;margin:2rem 0 .6rem}
.content p,.content li{color:var(--ink-2);max-width:72ch}
.content p b,.content li b{color:var(--ink)}
.content ul,.content ol{padding-left:1.3rem}
.content li{margin:.35rem 0}
.content hr{border:0;border-top:1px solid var(--line);margin:2.5rem 0}
.content :not(pre)>code{font-size:.86em;background:var(--bg-2);border:1px solid var(--line);border-radius:5px;padding:.08em .35em;color:var(--ink)}
.content table{width:100%;border-collapse:collapse;font-size:.93rem;margin:1.2rem 0 1.6rem;display:block;overflow-x:auto}
.content th,.content td{text-align:left;vertical-align:top;padding:.65rem .8rem;border-bottom:1px solid var(--line)}
.content th{font:600 .75rem/1.2 var(--font-body);text-transform:uppercase;letter-spacing:.06em;color:var(--muted);border-bottom-color:var(--line-2)}
.content td code{white-space:nowrap}
.code{position:relative;margin:1.1rem 0 1.5rem}
.code pre{margin:0;background:var(--code-bg);color:var(--code-ink);border-radius:12px;padding:1.05rem 1.15rem;overflow-x:auto;font-size:.86rem;line-height:1.65;box-shadow:var(--shadow)}
.code .copy{position:absolute;top:.6rem;right:.7rem;color:var(--code-dim)}
.code .k{color:#7ff0c4}.code .s{color:#f2c879}.code .d{color:var(--code-dim)}.code .p{color:#3fd19c}
.callout{display:flex;gap:.9rem;border:1px solid var(--note-line);background:var(--note-bg);border-radius:14px;padding:1.1rem 1.25rem;margin:1.5rem 0}
.callout svg{flex-shrink:0;width:22px;height:22px;color:var(--note-ink);margin-top:.15rem}
.callout .t{font-weight:600;color:var(--note-ink);margin:0 0 .25rem;font-size:1.02rem}
.callout p{margin:0;color:var(--note-ink);max-width:none}
.callout.warn{border-color:var(--warn-line);background:var(--warn-bg)}
.callout.warn svg,.callout.warn .t,.callout.warn p{color:var(--warn-ink)}
.cards{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1rem;margin:1.5rem 0 2rem}
.card{display:block;border:1px solid var(--line);border-radius:14px;padding:1.3rem 1.3rem 1.2rem;background:var(--surface);color:inherit;transition:border-color .15s,box-shadow .15s,transform .15s}
.card:hover{text-decoration:none;border-color:var(--accent);box-shadow:var(--shadow);transform:translateY(-1px)}
.card .ic{width:40px;height:40px;border-radius:10px;display:grid;place-items:center;background:var(--accent-soft);color:var(--accent);margin-bottom:.9rem}
.card .ic svg{width:21px;height:21px}
.card b{display:block;color:var(--ink);font-weight:600;margin-bottom:.3rem}
.card span{color:var(--muted);font-size:.93rem;line-height:1.5}
.stats{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:0;border:1px solid var(--line);border-radius:14px;overflow:hidden;margin:1.5rem 0 2rem}
.stats div{padding:1.1rem 1.1rem;border-right:1px solid var(--line)}
.stats div:last-child{border-right:0}
.stats b{display:block;font:500 1.6rem/1.1 var(--font-mono);color:var(--ink);letter-spacing:-.02em}
.stats span{display:block;font-size:.84rem;color:var(--muted);margin-top:.35rem;line-height:1.4}
.badge{display:inline-block;font:500 .74rem/1.2 var(--font-mono);border-radius:5px;padding:.2rem .45rem;white-space:nowrap}
.b-ok{background:var(--accent-soft);color:var(--accent)}.b-warn{background:var(--warn-bg);color:var(--warn-ink);border:1px solid var(--warn-line)}.b-gap{background:rgba(200,60,50,.1);color:#c2453a}.b-dim{background:var(--bg-2);color:var(--muted);border:1px solid var(--line)}
[data-theme=dark] .b-gap{color:#ef8a7e}
.steps{counter-reset:st;list-style:none;padding:0;margin:1.2rem 0 1.8rem}
.steps li{counter-increment:st;position:relative;padding:0 0 1.1rem 2.6rem;margin:0;max-width:none}
.steps li::before{content:counter(st);position:absolute;left:0;top:.05rem;width:1.75rem;height:1.75rem;border-radius:50%;background:var(--accent-soft);color:var(--accent);font:600 .8rem/1.75rem var(--font-mono);text-align:center}
.pn{display:flex;justify-content:space-between;gap:1rem;border-top:1px solid var(--line);margin-top:3.5rem;padding-top:1.5rem}
.pn a{display:flex;flex-direction:column;gap:.2rem;color:var(--ink);font-weight:600;font-size:1.05rem}
.pn a small{font:500 .8rem var(--font-mono);color:var(--muted)}
.pn a.next{margin-left:auto;text-align:right}
.toc{position:sticky;top:var(--header);padding:2.6rem 0 2rem;font-size:.88rem;max-height:calc(100vh - var(--header));overflow:auto}
.toc h5{font-size:.8rem;font-weight:600;color:var(--ink);margin:0 0 .7rem}
.toc ul{list-style:none;padding:0;margin:0}
.toc a{display:block;color:var(--muted);padding:.28rem 0 .28rem .75rem;border-left:1px solid var(--line)}
.toc a:hover{color:var(--ink);text-decoration:none}
.toc a.on{color:var(--accent);border-left-color:var(--accent)}

/* playground (banc) */
.pg-presets{display:flex;flex-wrap:wrap;gap:.5rem;margin:0 0 1rem}
.pg-presets button{font:500 .85rem var(--font-body);border:1px solid var(--line-2);background:var(--surface);color:var(--ink);border-radius:8px;padding:.5rem .8rem;cursor:pointer}
.pg-presets button:hover{border-color:var(--accent)}
.pg{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:1rem}
.pg textarea{width:100%;min-height:520px;resize:vertical;background:var(--code-bg);color:var(--code-ink);border:1px solid var(--line-2);border-radius:12px;padding:1rem;font:400 .84rem/1.6 var(--font-mono);tab-size:2}
.pg-out{border:1px solid var(--line);border-radius:12px;padding:1rem;background:var(--surface);min-width:0}
#status{display:flex;flex-wrap:wrap;gap:.6rem;align-items:center;font-size:.92rem}
#status .digest{flex-basis:100%;font:400 .76rem var(--font-mono);color:var(--muted);word-break:break-all}
.tabs{display:flex;gap:.25rem;border-bottom:1px solid var(--line);margin:1rem 0 .8rem}
.tabs button{background:none;border:0;border-bottom:2px solid transparent;color:var(--muted);font:500 .88rem var(--font-body);padding:.5rem .7rem;cursor:pointer}
.tabs button[aria-selected=true]{color:var(--ink);border-bottom-color:var(--accent)}
[data-pane]{display:none}[data-pane].on{display:block}
[data-pane] pre{margin:0;max-height:440px;overflow:auto;background:var(--code-bg);color:var(--code-ink);border-radius:10px;padding:.9rem;font:400 .76rem/1.55 var(--font-mono)}
.kinds{display:flex;flex-wrap:wrap;gap:.4rem}
.issues{list-style:none;padding:0;margin:0}
.issues li{font-size:.86rem;background:rgba(200,60,50,.07);border:1px solid rgba(200,60,50,.2);border-radius:8px;padding:.5rem .7rem;margin:.35rem 0;max-width:none;color:var(--ink)}
.issues.warn li{background:var(--warn-bg);border-color:var(--warn-line)}
.issues b{font-family:var(--font-mono);font-weight:500;margin-right:.4rem}

/* search dialog */
.sd{position:fixed;inset:0;z-index:100;display:none;background:rgba(5,10,8,.55);backdrop-filter:blur(3px);padding:10vh 1rem 1rem}
.sd.open{display:block}
.sd-box{max-width:620px;margin:0 auto;background:var(--surface);border:1px solid var(--line-2);border-radius:14px;box-shadow:0 30px 80px rgba(0,0,0,.35);overflow:hidden}
.sd input{width:100%;border:0;border-bottom:1px solid var(--line);background:transparent;color:var(--ink);font:inherit;font-size:1.05rem;padding:1rem 1.1rem;outline:none}
.sd ul{list-style:none;margin:0;padding:.4rem;max-height:55vh;overflow:auto}
.sd li a{display:block;padding:.65rem .8rem;border-radius:9px;color:var(--ink)}
.sd li a:hover,.sd li a.sel{background:var(--accent-soft);text-decoration:none}
.sd li small{display:block;color:var(--muted);font-size:.82rem;margin-top:.1rem}
.sd .empty{padding:1rem 1.1rem;color:var(--muted);font-size:.92rem}

/* footer */
footer{border-top:1px solid var(--line);background:var(--bg)}
footer .wrap{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:2rem;padding-top:3rem;padding-bottom:2.5rem}
footer .fb{display:flex;align-items:center;gap:.55rem;color:var(--ink);margin-bottom:.8rem}
footer .fb svg{width:24px;height:24px;color:var(--accent)}
footer .fb b{letter-spacing:.14em;font-weight:600}
footer p{color:var(--muted);font-size:.92rem;margin:.2rem 0;max-width:46ch}
footer h6{font-size:.88rem;font-weight:600;color:var(--ink);margin:0 0 .8rem}
footer ul{list-style:none;padding:0;margin:0}
footer li{margin:.45rem 0}
footer li a{color:var(--muted);font-size:.92rem}
footer li a:hover{color:var(--ink)}
footer .legal{grid-column:1/-1;display:flex;align-items:center;gap:.7rem;border-top:1px solid var(--line);padding-top:1.4rem;color:var(--muted);font-size:.85rem}
footer .legal img{width:26px;height:26px}

/* responsive */
@media (max-width:1180px){.docs{grid-template-columns:240px minmax(0,1fr)}.toc{display:none}}
@media (max-width:980px){
  .hero .wrap{grid-template-columns:1fr}.term pre{height:360px}
  .search-btn{max-width:none}.search-btn span.lab,.search-btn kbd{display:none}.search-btn{flex:0 0 42px;padding:0;justify-content:center;margin:0 0 0 auto}
  .ver{display:none}
  .docs{grid-template-columns:1fr}
  .side{display:none;position:fixed;top:var(--header);left:0;right:0;bottom:0;height:auto;z-index:55;margin:0;border-right:0;padding:1.5rem clamp(1rem,2.6vw,2rem) 3rem}
  .side.open{display:block}
  .menu-btn{display:grid}
  footer .wrap{grid-template-columns:1fr 1fr}
}
@media (max-width:640px){
  .cards{grid-template-columns:1fr}.stats{grid-template-columns:1fr 1fr}.stats div:nth-child(2){border-right:0}.stats div:nth-child(-n+2){border-bottom:1px solid var(--line)}
  .pg{grid-template-columns:1fr}.pg textarea{min-height:360px}
  .content .lead{font-size:1.12rem}
  .brand b{font-size:1.1rem}
  .pn{flex-direction:column}.pn a.next{margin-left:0}
}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}
.small{font-size:.86rem;color:var(--muted)}.b-bad{background:rgba(200,60,50,.1);color:#c2453a}
[data-theme=dark] .b-bad{color:#ef8a7e}
.search-btn svg,.icon-btn svg{width:18px;height:18px;flex-shrink:0}
.search-btn .lab{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.search-btn kbd{white-space:nowrap;border:1px solid var(--line-2);border-radius:5px;padding:.1rem .35rem;font-family:var(--font-mono)}
.pg textarea{white-space:pre;overflow-wrap:normal;overflow:auto}
@media (max-width:640px){.term pre{height:300px;font-size:.74rem}}