/* ARTRIUM −1 · shared design language */
:root{
--c-bg:#FBFAF7;--c-bg-2:#F3F1EA;--c-bg-dark:#101014;--c-text:#101014;--c-text-2:#45474E;--c-text-3:#8B8C90;
--c-on-dark:#F3F1EA;--c-on-dark-2:#9C9DA6;--c-blue:#1226AA;--c-blue-deep:#0C1B7A;--c-on-blue:#EDEFFA;--c-on-blue-2:#8E9AD6;
--c-border:#E1DED4;--c-border-2:#2A2B33;
--f-display:'Instrument Sans',system-ui,sans-serif;--f-serif:'Cormorant Garamond',Georgia,serif;--f-sans:'Instrument Sans',system-ui,sans-serif;--f-mono:'JetBrains Mono',ui-monospace,monospace;
--maxw:1440px;--gut:clamp(20px,5vw,64px);
--s3:16px;--s4:24px;--s5:32px;--s6:48px;--s7:72px;--s8:120px}
/* blue = "bold": every dark block becomes ultramarine */
[data-blue="bold"]{--c-bg-dark:var(--c-blue-deep);--c-on-dark:var(--c-on-blue);--c-on-dark-2:var(--c-on-blue-2);--c-border-2:#25349B}
/* blue = "mix": only blocks marked data-tone="blue" go ultramarine, the rest stay near-black */
[data-blue="mix"] [data-tone="blue"]{--c-bg-dark:var(--c-blue-deep);--c-on-dark:var(--c-on-blue);--c-on-dark-2:var(--c-on-blue-2);--c-border-2:#25349B}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
html,body{background:var(--c-bg);color:var(--c-text);font-family:var(--f-sans);font-size:16px;line-height:1.55;-webkit-font-smoothing:antialiased}
body{overflow-x:hidden}
img,svg{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
a:hover{color:var(--c-blue)}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
::selection{background:var(--c-blue);color:#fff}
:focus-visible{outline:2px solid var(--c-blue);outline-offset:3px}
.section-dark :focus-visible{outline-color:var(--c-on-dark)}
.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}
.skip-link{position:absolute;left:-9999px;top:0;z-index:200;background:var(--c-blue);color:#fff;padding:12px 20px;font-size:13px;letter-spacing:.08em;text-transform:uppercase}
.skip-link:focus{left:0;color:#fff}
.container{max-width:var(--maxw);margin:0 auto;padding-left:var(--gut);padding-right:var(--gut)}
section{padding-top:var(--s8);padding-bottom:var(--s8)}
@media(max-width:768px){section{padding-top:var(--s7);padding-bottom:var(--s7)}}
.display{font-family:var(--f-display);font-weight:500;letter-spacing:-.035em;line-height:1}
.serif-em{font-family:var(--f-serif);font-style:italic;font-weight:400;letter-spacing:0}
.mono{font-family:var(--f-mono);font-size:12px;letter-spacing:.04em}
.micro{font-size:11px;letter-spacing:.16em;text-transform:uppercase;font-weight:500;color:var(--c-text-2)}
.section-num{font-family:var(--f-mono);font-size:12px;color:var(--c-text-3);letter-spacing:.04em}
.section-head{display:flex;align-items:baseline;justify-content:space-between;gap:var(--s4);padding-bottom:var(--s6);border-bottom:1px solid var(--c-border);margin-bottom:var(--s6)}
.section-head .left{display:flex;align-items:baseline;gap:var(--s3)}
.section-head h2,.section-head h1{font-family:var(--f-display);font-weight:500;font-size:clamp(28px,3.4vw,44px);letter-spacing:-.03em;line-height:1.02}
.section-head a.right{font-size:14px;color:var(--c-text-2);border-bottom:1px solid currentColor;padding-bottom:2px}
.section-head a.right:hover{color:var(--c-blue)}
/* header */
.hdr{position:fixed;top:0;left:0;right:0;z-index:50;background:rgba(251,250,247,0);transition:background .25s,border-color .25s;border-bottom:1px solid transparent}
.hdr.scrolled{background:color-mix(in oklab,var(--c-bg) 92%,transparent);backdrop-filter:blur(20px) saturate(140%);-webkit-backdrop-filter:blur(20px) saturate(140%);border-color:var(--c-border)}
.hdr-inner{height:88px;transition:height .25s;display:flex;align-items:center;justify-content:space-between;gap:var(--s5);padding:0 var(--gut);max-width:var(--maxw);margin:0 auto}
.hdr.scrolled .hdr-inner{height:64px}
.brand{font-family:var(--f-display);font-weight:600;font-size:20px;letter-spacing:.05em;text-transform:uppercase;display:flex;align-items:baseline;gap:10px;white-space:nowrap}
.brand .m1{color:var(--c-blue)}
.brand:hover{color:inherit}
.brand small{color:var(--c-text-3);font-size:10px;letter-spacing:.18em;font-family:var(--f-mono);font-weight:400}
.nav-main{display:flex;gap:var(--s5);align-items:center}
.nav-main a{font-size:14px;color:var(--c-text-2);padding:6px 0;border-bottom:1px solid transparent;white-space:nowrap;transition:color .15s,border-color .15s}
.nav-main a:hover,.nav-main a.active{color:var(--c-text);border-color:var(--c-blue)}
.btn{display:inline-flex;align-items:center;gap:10px;padding:13px 24px;font-size:13px;letter-spacing:.08em;text-transform:uppercase;font-weight:600;white-space:nowrap;transition:background .15s,color .15s,border-color .15s}
.btn .arrow{transition:transform .25s}
.btn:hover .arrow{transform:translateX(4px)}
.btn-blue{background:var(--c-blue);color:#fff;border:1px solid var(--c-blue)}
.btn-blue:hover{background:var(--c-blue-deep);color:#fff}
.btn-dark{background:var(--c-text);color:var(--c-bg);border:1px solid var(--c-text)}
.btn-dark:hover{background:transparent;color:var(--c-text)}
.btn-outline{background:transparent;color:var(--c-text);border:1px solid var(--c-text)}
.btn-outline:hover{background:var(--c-text);color:var(--c-bg)}
.btn-on-dark{background:var(--c-on-dark);color:var(--c-bg-dark);border:1px solid var(--c-on-dark)}
.btn-on-dark:hover{background:transparent;color:var(--c-on-dark)}
.btn-on-dark-outline{background:transparent;color:var(--c-on-dark);border:1px solid var(--c-on-dark-2)}
.btn-on-dark-outline:hover{background:var(--c-on-dark);color:var(--c-bg-dark)}
/* mobile nav */
.mob-top{display:none;position:fixed;top:0;left:0;right:0;z-index:50;height:56px;padding:0 16px;background:color-mix(in oklab,var(--c-bg) 94%,transparent);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border-bottom:1px solid var(--c-border);align-items:center;justify-content:center}
.mob-top .brand{font-size:15px}
.mob-dock{display:none;position:fixed;bottom:0;left:0;right:0;z-index:50;background:color-mix(in oklab,var(--c-bg) 96%,transparent);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border-top:1px solid var(--c-border);padding:var(--dock-pad-t) 8px calc(var(--dock-pad-b) + env(safe-area-inset-bottom));--dock-pad-t:8px;--dock-pad-b:8px}
.mob-dock-inner{display:grid;grid-template-columns:1fr 1fr 1.4fr 1fr 1fr;gap:4px;align-items:end}
.dock-item{display:flex;flex-direction:column;align-items:center;gap:4px;padding:8px 0;color:var(--c-text-2);font-size:10px;letter-spacing:.08em;text-transform:uppercase}
.dock-item.active{color:var(--c-text)}
.dock-item .ico{width:24px;height:24px;display:grid;place-items:center}
/* CTA ovál sahá přesně k horní hraně lišty: stretch na výšku řádku
   plus negativní horní margin o velikosti vnitřního odsazení lišty */
.dock-item.cta{color:#fff;background:var(--c-blue);border-radius:999px;padding:6px 8px;align-self:stretch;justify-content:center;gap:2px;margin-top:calc(-1 * var(--dock-pad-t));box-shadow:0 -2px 18px rgba(18,38,170,.22)}
.dock-item.cta .label{font-weight:600;letter-spacing:.1em}
@media(max-width:1000px){.hdr{display:none}.mob-top{display:flex}.mob-dock{display:block}body{padding-top:56px;padding-bottom:84px}}
/* dark + blue sections */
.section-dark{background:var(--c-bg-dark);color:var(--c-on-dark)}
.section-dark .section-head{border-color:var(--c-border-2)}
.section-dark .section-head h2{color:var(--c-on-dark)}
.section-dark .section-num{color:var(--c-on-dark-2)}
.section-blue{background:var(--c-blue);color:var(--c-on-blue)}
/* eyebrow */
.eyebrow{display:flex;align-items:center;gap:10px;font-family:var(--f-mono);font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:var(--c-text-3);margin-bottom:var(--s4)}
.eyebrow .dot{width:6px;height:6px;border-radius:999px;background:var(--c-blue)}
/* image placeholder */
.ph{position:relative;background:var(--c-bg-2);border:1px solid var(--c-border);overflow:hidden;display:grid;place-items:center}
.ph .ph-label{font-family:var(--f-mono);font-size:10px;letter-spacing:.14em;color:var(--c-text-3);text-transform:uppercase;text-align:center;line-height:1.8;padding:16px}
.ph::before{content:"";position:absolute;inset:0;background:repeating-linear-gradient(45deg,transparent 0 10px,rgba(16,16,20,.025) 10px 11px)}
.ph.on-dark{background:rgba(255,255,255,.04);border-color:var(--c-border-2)}
.ph.on-dark .ph-label{color:var(--c-on-dark-2)}
/* reveal */
.reveal{opacity:0;transform:translateY(24px);transition:opacity .8s ease,transform .8s ease}
.reveal.in{opacity:1;transform:translateY(0)}
@media(prefers-reduced-motion:reduce){
html{scroll-behavior:auto}
.reveal{opacity:1;transform:none;transition:none}
*,*::before,*::after{animation-duration:.01ms !important;transition-duration:.01ms !important}}
/* footer */
footer.foot{background:var(--c-bg-dark);color:var(--c-on-dark);padding:var(--s8) 0 var(--s5)}
.foot-grid{display:grid;grid-template-columns:1.4fr repeat(3,1fr);gap:var(--s5);padding-bottom:var(--s7);border-bottom:1px solid var(--c-border-2)}
@media(max-width:1000px){.foot-grid{grid-template-columns:1fr 1fr}}
@media(max-width:600px){.foot-grid{grid-template-columns:1fr}}
.foot .brand{color:var(--c-on-dark)}
.foot .brand .m1{color:var(--c-on-blue-2)}
[data-blue="bold"] .foot .brand .m1{color:var(--c-on-blue)}
.foot .brand-block p{color:var(--c-on-dark-2);font-size:13px;line-height:1.6;max-width:30ch;margin-top:var(--s3)}
.foot-col h4{font-family:var(--f-mono);font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--c-on-dark-2);margin-bottom:var(--s3);font-weight:400}
.foot-col ul{list-style:none;display:flex;flex-direction:column;gap:10px}
.foot-col a,.foot-col li{font-size:14px;color:var(--c-on-dark)}
.foot-col a:hover{color:var(--c-on-blue-2)}
.foot-legal{padding-top:var(--s4);display:flex;justify-content:space-between;gap:var(--s3);flex-wrap:wrap;font-family:var(--f-mono);font-size:11px;letter-spacing:.04em;color:var(--c-on-dark-2)}
.foot-legal a{color:var(--c-on-dark-2)}
.foot-legal a:hover{color:var(--c-on-dark)}
/* forms */
.form-dark{border:1px solid var(--c-border-2);padding:var(--s6);display:flex;flex-direction:column;gap:var(--s3)}
.form-dark label{display:flex;flex-direction:column;gap:6px}
.form-dark .lbl{font-family:var(--f-mono);font-size:11px;letter-spacing:.08em;color:var(--c-on-dark-2);text-transform:uppercase}
.form-dark input,.form-dark select{background:transparent;border:0;border-bottom:1px solid var(--c-border-2);color:var(--c-on-dark);padding:12px 0 10px;font-family:var(--f-sans);font-size:15px;min-height:48px}
.form-dark input:focus{outline:none;border-color:var(--c-on-dark)}
.form-dark .trust{font-family:var(--f-mono);font-size:11px;letter-spacing:.04em;color:var(--c-on-dark-2);margin-top:var(--s3)}
.radio-row{display:flex;gap:6px;flex-wrap:wrap}
.radio-chip{border:1px solid var(--c-border-2);padding:10px 16px;font-size:13px;color:var(--c-on-dark-2);cursor:pointer;letter-spacing:.06em;transition:background .15s,color .15s,border-color .15s;min-height:44px}
.radio-chip:hover{color:var(--c-on-dark)}
.radio-chip.active,.radio-chip[aria-checked="true"]{background:var(--c-on-dark);color:var(--c-bg-dark);border-color:var(--c-on-dark)}
/* FAQ */
.faq{max-width:860px}
.faq-item{border-bottom:1px solid var(--c-border)}
.faq-item:first-child{border-top:1px solid var(--c-border)}
.faq-item summary{list-style:none;cursor:pointer;padding:24px 0;display:flex;gap:var(--s4);align-items:baseline;justify-content:space-between;font-family:var(--f-display);font-weight:500;font-size:clamp(17px,1.7vw,21px);letter-spacing:-.015em}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{color:var(--c-blue)}
.faq-item summary .sign{font-family:var(--f-mono);font-size:18px;color:var(--c-text-3);flex:0 0 auto;transition:transform .25s}
.faq-item[open] summary .sign{transform:rotate(45deg)}
.faq-item .ans{padding:0 0 28px;color:var(--c-text-2);max-width:64ch;font-size:15px;line-height:1.7}
.faq-item .ans a{border-bottom:1px solid var(--c-blue);color:var(--c-blue)}
/* newsletter */
.news{text-align:center;max-width:720px;margin:0 auto}
.news h2{font-family:var(--f-display);font-weight:500;font-size:clamp(32px,4.4vw,56px);line-height:1.02;letter-spacing:-.03em}
.news .sub{color:var(--c-text-2);margin-top:var(--s4);font-size:16px}
.news-form{margin-top:var(--s6);display:flex;max-width:520px;margin-left:auto;margin-right:auto;border:1px solid var(--c-text)}
.news-form input{flex:1;background:transparent;border:0;padding:16px 18px;font-size:15px;color:var(--c-text);min-width:0}
.news-form input:focus{outline:none}
.news-form button{background:var(--c-text);color:var(--c-bg);padding:0 22px;font-size:12px;letter-spacing:.08em;text-transform:uppercase;font-weight:600}
.news-form button:hover{background:var(--c-blue);color:#fff}
/* newsletter na tmavém nebo ultramarínovém pozadí */
.section-dark .news h2{color:var(--c-on-dark)}
.section-dark .news .sub{color:var(--c-on-dark-2)}
.section-dark .news .section-num{color:var(--c-on-dark-2)}
.section-dark .news-form{border-color:var(--c-on-dark)}
.section-dark .news-form input{color:var(--c-on-dark)}
.section-dark .news-form input::placeholder{color:var(--c-on-dark-2)}
.section-dark .news-form button{background:var(--c-on-dark);color:var(--c-bg-dark)}
.section-dark .news-form button:hover{background:transparent;color:var(--c-on-dark)}
/* tweaks */
.tweaks{position:fixed;bottom:16px;right:16px;z-index:100;background:var(--c-bg);border:1px solid var(--c-border);width:280px;box-shadow:0 20px 60px rgba(0,0,0,.15);display:none}
.tweaks.open{display:block}
.tweaks-head{display:flex;align-items:center;justify-content:space-between;padding:12px 14px;border-bottom:1px solid var(--c-border);font-family:var(--f-mono);font-size:11px;letter-spacing:.12em;text-transform:uppercase}
.tweaks-body{padding:14px;display:flex;flex-direction:column;gap:14px}
.tweak-group label{display:block;font-family:var(--f-mono);font-size:10px;letter-spacing:.1em;color:var(--c-text-3);text-transform:uppercase;margin-bottom:6px}
.tweak-row{display:flex;gap:4px}
.tweak-row button{flex:1;padding:8px 6px;border:1px solid var(--c-border);font-size:11px;color:var(--c-text-2)}
.tweak-row button.active{background:var(--c-text);color:var(--c-bg);border-color:var(--c-text)}
@media(max-width:700px){.tweaks{left:16px;right:16px;width:auto;bottom:92px}}
/* ---------- právní stránky (podmínky, osobní údaje, cookies) ---------- */
.legal-head{padding-top:calc(88px + 72px);padding-bottom:var(--s6)}
@media(max-width:1000px){.legal-head{padding-top:48px}}
.legal-head h1{font-family:var(--f-display);font-weight:500;font-size:clamp(32px,4.4vw,60px);letter-spacing:-.035em;line-height:1;max-width:22ch}
.legal-head h1 .em{font-family:var(--f-serif);font-style:italic;font-weight:400;color:var(--c-blue)}
.legal{max-width:74ch;padding-bottom:var(--s8)}
.legal h2{font-family:var(--f-display);font-weight:500;font-size:clamp(19px,2vw,24px);letter-spacing:-.02em;margin:var(--s6) 0 var(--s3);padding-top:var(--s4);border-top:1px solid var(--c-border)}
.legal h2:first-child{margin-top:0;padding-top:0;border-top:0}
.legal h3{font-family:var(--f-display);font-weight:600;font-size:16px;margin:var(--s4) 0 8px}
.legal p{color:var(--c-text-2);line-height:1.75;margin-bottom:12px}
.legal ul,.legal ol{color:var(--c-text-2);line-height:1.75;margin:0 0 12px 22px}
.legal li{margin-bottom:6px}
.legal a{color:var(--c-blue);border-bottom:1px solid var(--c-blue)}
.legal strong{color:var(--c-text);font-weight:600}
.legal .todo{background:var(--c-bg-2);border-left:2px solid var(--c-blue);padding:14px 18px;font-family:var(--f-mono);font-size:12px;line-height:1.7;color:var(--c-text-2);margin:0 0 16px}
.legal table{width:100%;border-collapse:collapse;margin:0 0 16px;font-size:14px}
.legal th,.legal td{text-align:left;padding:12px 10px 12px 0;border-bottom:1px solid var(--c-border);vertical-align:top;color:var(--c-text-2)}
.legal th{font-family:var(--f-mono);font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--c-text-3);font-weight:400}
.legal .updated{margin-top:var(--s6);font-family:var(--f-mono);font-size:11px;letter-spacing:.06em;color:var(--c-text-3)}
.legal-toc{list-style:none;margin:0 0 var(--s6);padding:0;columns:2;column-gap:32px}
@media(max-width:640px){.legal-toc{columns:1}.legal table{font-size:13px}}
.legal-toc li{margin-bottom:8px;font-size:14px;break-inside:avoid}
.legal-toc a{color:var(--c-text-2);border-bottom:1px solid transparent}
.legal-toc a:hover{color:var(--c-blue);border-color:var(--c-blue)}

/* ---------- cookie lišta ---------- */
.ck{position:fixed;right:16px;bottom:16px;left:16px;z-index:90;display:none;max-width:420px;margin-left:auto;
  background:color-mix(in oklab,var(--c-bg) 94%,transparent);backdrop-filter:blur(20px) saturate(140%);-webkit-backdrop-filter:blur(20px) saturate(140%);
  border:1px solid var(--c-border);box-shadow:0 20px 60px rgba(16,16,20,.18);transition:opacity .35s ease}
.ck.open{display:block}
.ck.dim{opacity:.42}
@media(max-width:1000px){.ck{bottom:calc(92px + env(safe-area-inset-bottom));max-width:none}}
.ck-in{padding:18px}
.ck-top{display:flex;align-items:flex-start;gap:12px}
.ck-title{flex:1;min-width:0;font-family:var(--f-display);font-weight:600;font-size:14px;letter-spacing:-.01em}
.ck-title a{color:var(--c-blue);border-bottom:1px solid var(--c-blue);font-weight:500}
.ck-toggle{flex:0 0 auto;width:32px;height:32px;display:grid;place-items:center;border:1px solid var(--c-border);color:var(--c-text-2);transition:transform .25s ease}
.ck[data-open="true"] .ck-toggle{transform:rotate(180deg)}
@media(min-width:1001px){.ck-toggle{display:none}}
.ck-body{display:none}
.ck[data-open="true"] .ck-body{display:block}
@media(min-width:1001px){.ck-body{display:block}}
.ck-text{margin-top:10px;font-size:13px;line-height:1.65;color:var(--c-text-2)}
.ck-opts{margin-top:14px;display:none;flex-direction:column;gap:8px}
.ck-opts.show{display:flex}
.ck-opt{display:flex;gap:10px;align-items:flex-start;border:1px solid var(--c-border);padding:10px 12px;cursor:pointer}
.ck-opt input{margin-top:2px;accent-color:var(--c-blue);width:16px;height:16px;flex:0 0 16px}
.ck-opt.locked{cursor:not-allowed;background:var(--c-bg-2)}
.ck-opt b{display:block;font-size:13px;font-weight:600}
.ck-opt span{display:block;font-size:12px;color:var(--c-text-2);line-height:1.55}
.ck-btns{margin-top:14px;display:flex;gap:8px;flex-wrap:wrap}
.ck-btns .btn{padding:11px 18px;font-size:12px}
.ck-mini{margin-top:10px;font-family:var(--f-mono);font-size:10px;letter-spacing:.08em;text-transform:uppercase;color:var(--c-text-3)}
@media(prefers-reduced-motion:reduce){.ck,.ck-toggle{transition:none}}