/* ITIVNIK — Home. Токени, базові стилі, анімації, адаптив, hover-стани. */

html{--bg:#0b0c0e;--s1:#0f1013;--s2:#121316;--s3:#15171b;--s4:#1b1d22;--fg:#ecedef;--fg2:#d3d6dc;--muted:#b4b8c0;--muted2:#8b8f98;--line1:rgba(255,255,255,.06);--line2:rgba(255,255,255,.08);--line3:rgba(255,255,255,.14);--grid:rgba(255,255,255,.035);--hi:rgba(255,255,255,.05);--hi0:rgba(255,255,255,.02);--navbg:rgba(11,12,14,.72);--accent:oklch(0.87 0.15 160);--accent-hover:oklch(0.92 0.14 160);--accent-text:oklch(0.87 0.15 160);--ink:#0b0c0e;--onink:#ecedef;--shadow:0 40px 80px rgba(0,0,0,.5);color-scheme:dark}
html[data-theme="light"]{--bg:#f6f6f3;--s1:#ffffff;--s2:#ffffff;--s3:#ecece8;--s4:#e6e6e1;--fg:#141518;--fg2:#2b2d33;--muted:#4b4f58;--muted2:#6c707a;--line1:rgba(0,0,0,.07);--line2:rgba(0,0,0,.1);--line3:rgba(0,0,0,.18);--grid:rgba(0,0,0,.05);--hi:rgba(0,0,0,.035);--hi0:rgba(0,0,0,.015);--navbg:rgba(246,246,243,.78);--accent:oklch(0.78 0.16 160);--accent-hover:oklch(0.82 0.15 160);--accent-text:oklch(0.48 0.13 160);--shadow:0 30px 60px rgba(0,0,0,.14);color-scheme:light}

html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--fg);font-family:'Onest',system-ui,sans-serif;-webkit-font-smoothing:antialiased;transition:background .3s,color .3s}
a{color:var(--fg);text-decoration:none}
a:hover{color:var(--accent-text)}
*{box-sizing:border-box}
button{font-family:inherit}

@keyframes rise{from{opacity:0;transform:translateY(28px)}to{opacity:1;transform:none}}
@keyframes msgIn{from{opacity:0;transform:translateY(10px) scale(.98)}to{opacity:1;transform:none}}
@keyframes dot{0%,80%,100%{opacity:.25;transform:translateY(0)}40%{opacity:1;transform:translateY(-3px)}}
@keyframes packet{0%{left:0%;opacity:0}8%{opacity:1}92%{opacity:1}100%{left:100%;opacity:0}}
@keyframes pulse{0%{box-shadow:0 0 0 0 oklch(from var(--accent) l c h / .45)}100%{box-shadow:0 0 0 14px oklch(from var(--accent) l c h / 0)}}
@keyframes marquee{from{transform:translateX(0)}to{transform:translateX(-50%)}}
@keyframes spin{to{transform:rotate(360deg)}}
@keyframes blink{50%{opacity:0}}

/* --- hover-стани (у дизайні були style-hover) --- */
.btn-accent{transition:background .25s}
.btn-accent:hover{background:var(--accent-hover);color:var(--ink)}
.btn-hero{transition:transform .2s}
.btn-hero:hover{transform:translateY(-2px);color:var(--ink)}
.btn-outline:hover{border-color:var(--accent-text);color:var(--fg)}
.theme-btn{transition:border-color .25s}
.theme-btn:hover{border-color:var(--accent)}
.card-hv{transition:transform .35s,border-color .35s}
.card-hv:hover{transform:translateY(-4px);border-color:oklch(from var(--accent) l c h / .5);color:var(--fg)}
.row-hv{transition:border-color .3s}
.row-hv:hover{border-color:oklch(from var(--accent) l c h / .5)}
.cta-dark:hover{color:var(--accent-text)}
.cta-outline:hover{color:var(--ink);background:rgba(11,12,14,.08)}

/* --- конвеєр (активна картка) --- */
.flow-card{background:var(--s1);border:1px solid var(--line2);transition:background .6s cubic-bezier(.2,.8,.2,1),border-color .6s cubic-bezier(.2,.8,.2,1),transform .6s cubic-bezier(.2,.8,.2,1)}
.flow-card.on{background:var(--hi);border-color:oklch(from var(--accent) l c h / .6);transform:translateY(-6px)}
.flow-num{color:var(--muted2);transition:color .5s}
.on .flow-num{color:var(--accent-text)}
.flow-icon{background:var(--line1);color:var(--muted);transition:background .5s,color .5s}
.on .flow-icon{background:var(--accent);color:var(--ink)}

/* --- чат --- */
.msg{display:flex;animation:msgIn .45s cubic-bezier(.2,.8,.2,1) both}
.msg.a{justify-content:flex-start}
.msg.u{justify-content:flex-end}
.msg>div{max-width:84%;padding:11px 14px;border-radius:16px;font-size:14.5px;line-height:1.45;text-wrap:pretty}
.msg.a>div{background:var(--s4);color:var(--fg);border:1px solid var(--line1)}
.msg.u>div{background:var(--accent);color:var(--ink);border:1px solid transparent}
.hide{display:none!important}

/* --- поява при скролі --- */
.rv{opacity:0;transform:translateY(26px);transition:opacity .7s cubic-bezier(.2,.8,.2,1),transform .7s cubic-bezier(.2,.8,.2,1)}
.rv.in{opacity:1;transform:none}

/* --- адаптив --- */
@media (max-width:820px){
[data-m="links"],[data-m="cta"],[data-m="tlabel"]{display:none!important}
[data-m="menu"]{display:inline-flex!important}
[data-m="flow"]{grid-template-columns:repeat(2,minmax(0,1fr))!important}
section,article{padding-left:20px!important;padding-right:20px!important}
[data-m="sec"]{padding-top:56px!important;padding-bottom:40px!important}
[data-m="hero"]{padding-top:40px!important;padding-bottom:48px!important;gap:36px!important}
[data-m="chat"]{min-height:300px!important}
[data-m="bars"]{grid-template-columns:80px 1fr 46px!important}
}
@media (max-width:480px){[data-m="diff"]{grid-template-columns:1fr!important}[data-m="diff"]>div+div{border-left:none!important;border-top:1px solid var(--line2)!important}}
@media (prefers-reduced-motion:reduce){
.rv{opacity:1;transform:none;transition:none}
*{animation-duration:.01ms!important;animation-iteration-count:1!important}
}

/* ===== спільне для Blog / Article ===== */
@keyframes flowdot{0%{left:0%;opacity:0}10%{opacity:1}90%{opacity:1}100%{left:100%;opacity:0}}
.rv{transform:translateY(var(--rv-y,26px))}

/* чіпи рубрик (Blog) */
.chip{cursor:pointer;font-family:'Geist Mono',monospace;font-size:13px;padding:9px 16px;border-radius:999px;border:1px solid var(--line3);background:transparent;color:var(--muted);transition:all .25s}
.chip:hover{border-color:var(--accent-text)}
.chip.on{background:var(--accent);color:var(--ink);border-color:var(--accent)}
.feat-hv{transition:border-color .35s}
.feat-hv:hover{border-color:oklch(from var(--accent) l c h / .5);color:var(--fg)}

/* стаття: прогрес, зміст, пояснювач, FAQ */
#progress{position:fixed;top:0;left:0;height:2px;width:0;background:var(--accent);z-index:60;transition:width .1s linear}
.toc a{font-size:14px;line-height:1.4;padding:6px 0;color:var(--muted2);transition:color .25s;text-wrap:pretty}
.toc a.on{color:var(--accent-text)}
.flow2{padding:14px 12px;border-radius:14px;background:var(--s1);border:1px solid var(--line2);transition:background .5s,border-color .5s;display:grid;gap:8px}
.flow2.on{background:oklch(from var(--accent) l c h / .1);border-color:oklch(from var(--accent) l c h / .6)}
.flow2-tag{font-family:'Geist Mono',monospace;font-size:11px;color:var(--muted2);transition:color .5s}
.flow2.on .flow2-tag{color:var(--accent-text)}
.faq{border:1px solid var(--line2);border-radius:14px;background:var(--s1);overflow:hidden}
.faq-btn{all:unset;cursor:pointer;display:flex;justify-content:space-between;gap:16px;width:100%;padding:18px 20px;font-size:16px;font-weight:600;color:var(--fg);box-sizing:border-box}
.faq-btn:focus-visible{outline:2px solid var(--accent);outline-offset:-2px}
.faq-plus{font-family:'Geist Mono',monospace;color:var(--accent-text);transition:transform .3s}
.faq.open .faq-plus{transform:rotate(45deg)}
.faq-body{display:grid;grid-template-rows:0fr;transition:grid-template-rows .35s cubic-bezier(.2,.8,.2,1)}
.faq.open .faq-body{grid-template-rows:1fr}
.faq-body>div{overflow:hidden}


/* lightbox для скриншотів кейсів */
#lb{position:fixed;inset:0;z-index:9999;background:rgba(0,0,0,.92);display:flex;align-items:center;justify-content:center}
#lb[hidden]{display:none}
#lb img{max-width:min(92vw,520px);max-height:88vh;border-radius:14px;box-shadow:0 20px 60px rgba(0,0,0,.6)}
#lb button{position:absolute;background:rgba(255,255,255,.1);color:#fff;border:0;border-radius:999px;width:44px;height:44px;font-size:24px;line-height:44px;cursor:pointer}
#lb .lb-x{top:16px;right:16px}#lb .lb-p{left:12px;top:50%;transform:translateY(-50%)}#lb .lb-n{right:12px;top:50%;transform:translateY(-50%)}
#lb .lb-c{position:absolute;bottom:18px;left:0;right:0;text-align:center;color:#fff;opacity:.7;font-size:13px}