/* ============================================================
   Treesonance — landing (prodejni / pristavaci stranka)
   Kosmicky tmavy vzhled, zlato/zelena/modra akcenty.
   Systemove fonty (zadna nova CDN/licence). Plocha vyplnena,
   fluidni typografie (clamp), responzivni; scrollbar tlumeny
   ale funkcni (landing musi rolovat). ============================================================ */

:root{
  --bg:#070a10;
  --bg-soft:#0d121c;
  --panel:#121a28;
  --panel-2:#16202f;
  --ink:#e7eef6;
  --ink-dim:#9fb2c6;
  --ink-faint:#6f8298;
  --gold:#ffd24a;
  --green:#7dc88a;
  --blue:#8ab8d8;
  --line:rgba(138,184,216,.14);
  --radius:18px;
  --maxw:1180px;
  --ff:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,"Noto Sans",sans-serif;
  --shadow:0 18px 50px rgba(0,0,0,.45);
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

body{
  font-family:var(--ff);
  color:var(--ink);
  background:
    radial-gradient(1200px 700px at 50% -10%, #15233c 0%, rgba(21,35,60,0) 60%),
    radial-gradient(900px 600px at 85% 10%, #1a2030 0%, rgba(26,32,48,0) 55%),
    var(--bg);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}

/* tlumeny scrollbar (Firefox + WebKit) — funkcni, jen nenapadny */
html{scrollbar-width:thin;scrollbar-color:#2a3a52 transparent}
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-thumb{background:#2a3a52;border-radius:8px;border:2px solid transparent;background-clip:content-box}
::-webkit-scrollbar-track{background:transparent}

a{color:var(--blue);text-decoration:none}
a:hover{color:#aacdec}
img,svg{display:block;max-width:100%}

/* ----------------------- skip-link (klavesnice/ctecka) ----------------------- */
.skip-link{position:absolute;left:-9999px;top:0}
.skip-link:focus{left:.5rem;top:.5rem;z-index:200;padding:.5rem .9rem;background:var(--gold);color:#000;border-radius:8px;font-weight:700}

/* ----------------------- jazykove prepinani ----------------------- */
[data-lang="cs"] [data-en-only]{display:none}
[data-lang="en"] [data-cs-only]{display:none}

/* ----------------------- tlacitka ----------------------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.5em;
  font-family:inherit;font-size:clamp(.95rem,.4rem + .6vw,1.05rem);font-weight:700;
  padding:.78em 1.5em;border-radius:999px;border:1px solid transparent;
  cursor:pointer;transition:transform .15s ease, box-shadow .2s ease, background .2s ease, border-color .2s ease;
  white-space:nowrap;line-height:1.1;
}
.btn:active{transform:translateY(1px)}
.btn:focus-visible{outline:2px solid var(--gold);outline-offset:3px}
.btn-primary{background:linear-gradient(180deg,#9ad8a6,#62b676);color:#06150b;box-shadow:0 10px 26px rgba(125,200,138,.28)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 34px rgba(125,200,138,.38);color:#06150b}
.btn-buy{background:linear-gradient(180deg,#ffdf72,#f0b929);color:#241a02;box-shadow:0 10px 26px rgba(255,210,74,.26)}
.btn-buy:hover{transform:translateY(-2px);box-shadow:0 16px 34px rgba(255,210,74,.36);color:#241a02}
.btn-ghost{background:rgba(138,184,216,.08);color:var(--ink);border-color:var(--line)}
.btn-ghost:hover{background:rgba(138,184,216,.16);color:#fff;transform:translateY(-1px)}
.btn-block{display:flex;width:100%}

/* ----------------------- NAV ----------------------- */
.nav{
  position:sticky;top:0;z-index:50;
  display:flex;align-items:center;gap:1.2rem;
  padding:.7rem clamp(1rem,4vw,2.4rem);
  background:rgba(7,10,16,.72);
  backdrop-filter:blur(7px);
  -webkit-backdrop-filter:blur(7px);
  border-bottom:1px solid var(--line);
}
/* bez podpory backdrop-filter (starsi/atypicke prohlizece) zhustit pozadi, at pruh zustane citelny */
@supports not ((backdrop-filter:blur(1px)) or (-webkit-backdrop-filter:blur(1px))){.nav{background:rgba(7,10,16,.95)}}
.brand{display:flex;align-items:center;gap:.55rem;color:var(--ink);font-weight:800;letter-spacing:.2px;font-size:1.12rem}
.brand:hover{color:#fff}
.brand-mark{display:inline-flex;filter:drop-shadow(0 2px 6px rgba(255,214,0,.35))}
.nav-menu{flex:1;min-width:0}
.nav-menu>summary{display:none}
.nav-links{display:flex;gap:1.4rem;margin-left:1rem}
.nav-links a{color:var(--ink-dim);font-size:.97rem;font-weight:600}
.nav-links a:hover{color:var(--ink)}
.nav-actions{display:flex;align-items:center;gap:.7rem}
/* desktop: odkazy vzdy videt (prebij UA skryvani zavreneho <details>) */
@media (min-width:761px){ .nav-menu>summary{display:none} .nav-menu .nav-links{display:flex !important} }
.lang-toggle{
  display:inline-flex;align-items:center;gap:.15em;background:transparent;border:1px solid var(--line);
  color:var(--ink-dim);border-radius:999px;padding:.4em .7em;cursor:pointer;font-family:inherit;font-weight:700;font-size:.85rem;
}
.lang-toggle:hover{color:var(--ink);border-color:rgba(138,184,216,.3)}
.lang-toggle:focus-visible{outline:2px solid var(--gold);outline-offset:2px}
.lang-sep{opacity:.4}
.lang-opt{opacity:.45;transition:opacity .15s}
[data-lang="cs"] .lang-opt[data-lang-opt="cs"],[data-lang="en"] .lang-opt[data-lang-opt="en"]{opacity:1;color:var(--gold)}

/* ----------------------- HERO ----------------------- */
.hero{
  position:relative;min-height:min(92vh,820px);
  display:grid;align-items:center;
  padding:clamp(2rem,7vh,5rem) clamp(1rem,4vw,2.4rem) clamp(3rem,8vh,6rem);
  overflow:hidden;
}
.hero-stage{position:absolute;inset:0;z-index:0}
.hero-poster,.hero-live{position:absolute;inset:0}
.hero-poster{transition:opacity .8s ease;cursor:pointer}
.poster-tree{width:100%;height:100%;object-fit:cover;opacity:.9}
.poster-leaves circle{animation:leafPulse 4s ease-in-out infinite}
.poster-leaves circle:nth-child(2n){animation-delay:.8s}
.poster-leaves circle:nth-child(3n){animation-delay:1.6s}
@keyframes leafPulse{0%,100%{opacity:.65;transform:translateY(0)}50%{opacity:1;transform:translateY(-3px)}}
@media (prefers-reduced-motion:reduce){.poster-leaves circle{animation:none}}
/* po probuzeni hera uz poster neni videt -> nech listy nehybat (setri slabsi PC) */
.hero.live .poster-leaves circle{animation-play-state:paused}
.poster-play{
  position:absolute;left:50%;top:65.5%;transform:translate(-50%,-50%);z-index:3; /* vyska ~ CTA tlacitka, aby neprekryvalo nadpis */
  background:rgba(7,10,16,.55);color:var(--ink);border:1px solid var(--line);
  backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px);
  border-radius:999px;padding:.7em 1.3em;font-family:inherit;font-weight:700;font-size:1rem;cursor:pointer;
  transition:transform .15s,background .2s,border-color .2s;
}
.poster-play:hover{transform:translate(-50%,-50%) scale(1.05);background:rgba(13,18,28,.8);border-color:rgba(255,210,74,.4);color:#fff}
.poster-play:focus-visible{outline:2px solid var(--gold);outline-offset:3px}
.hero-live{opacity:0;transition:opacity 1s ease;pointer-events:none}
.hero-live iframe{width:100%;height:100%;border:0;display:block}
.hero.live .hero-live{opacity:1}
.hero.live .hero-poster{opacity:0;pointer-events:none}
.hero-vignette{position:absolute;inset:0;z-index:1;pointer-events:none;
  background:
    linear-gradient(90deg, rgba(7,10,16,.82) 0%, rgba(7,10,16,.35) 42%, rgba(7,10,16,.15) 70%, rgba(7,10,16,.55) 100%),
    linear-gradient(0deg, var(--bg) 2%, rgba(7,10,16,0) 32%);
}
.hero-inner{position:relative;z-index:2;max-width:var(--maxw);margin:0 auto;width:100%;pointer-events:none}
.hero-copy{max-width:min(640px,92%);pointer-events:none;--h1-size:clamp(2.1rem,1rem + 4.4vw,4rem)}
/* jen skutecna CTA chytaji klik; zbytek hera propousti na poster (probuzeni klikem kamkoliv) */
.hero-copy a,.hero-copy button{pointer-events:auto}
.hero-copy h1{
  font-size:calc(var(--h1-size) * .7);line-height:1.06;letter-spacing:-.02em;font-weight:800;
  color:var(--ink); /* bezpecny fallback: kdyz clip-to-text selze, nadpis je videt plnou barvou */
  text-shadow:0 2px 30px rgba(0,0,0,.4);
}
.hero-copy .hero-tagline{
  margin-top:.55rem;font-size:calc(var(--h1-size) * .4);line-height:1.14;letter-spacing:-.01em;font-weight:700;
  color:var(--ink); /* stejny fallback jako h1 */
  text-shadow:0 2px 30px rgba(0,0,0,.4);
}
/* gradient clip-to-text jen kde je podporovan; -webkit-text-fill-color kvuli WebKit/iOS */
@supports ((-webkit-background-clip:text) or (background-clip:text)){
  .hero-copy h1,.hero-copy .hero-tagline{
    background:linear-gradient(120deg,#ffffff 20%,#cfe3f4 55%,var(--green) 100%);
    -webkit-background-clip:text;background-clip:text;
    -webkit-text-fill-color:transparent;color:transparent;
  }
}
/* Windows High Contrast / forced-colors: vrat citelnou systemovou barvu (transparent by zmizel) */
@media (forced-colors:active){
  .hero-copy h1,.hero-copy .hero-tagline{background:none;-webkit-text-fill-color:CanvasText;color:CanvasText;}
}
.hero-sub{margin-top:1.1rem;font-size:clamp(1.02rem,.6rem + .8vw,1.25rem);color:var(--ink-dim);max-width:34em}
.hero-cta{display:flex;flex-wrap:wrap;gap:.8rem;margin-top:1.8rem}
.hero-note{margin-top:1rem;font-size:.92rem;color:var(--ink-faint)}

/* ----------------------- spolecne sekce ----------------------- */
section{padding:clamp(3rem,8vh,6rem) clamp(1rem,4vw,2.4rem)}
.section-title{
  font-size:clamp(1.6rem,1rem + 2.2vw,2.6rem);font-weight:800;letter-spacing:-.01em;text-align:center;
  max-width:var(--maxw);margin:0 auto;
}
.section-lead{text-align:center;color:var(--ink-dim);max-width:46em;margin:.9rem auto 0;font-size:clamp(1rem,.7rem + .5vw,1.15rem)}

/* ----------------------- FEATURES ----------------------- */
.feature-grid{
  max-width:var(--maxw);margin:2.6rem auto 0;
  display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:1.2rem;
}
.feature{
  background:linear-gradient(180deg,var(--panel),var(--bg-soft));
  border:1px solid var(--line);border-radius:var(--radius);padding:1.6rem 1.5rem;
  transition:transform .2s ease,border-color .2s ease,box-shadow .2s ease;
}
.feature:hover{transform:translateY(-4px);border-color:rgba(138,184,216,.28);box-shadow:var(--shadow)}
.feature-icon{
  width:2.6rem;height:2.6rem;border-radius:12px;display:grid;place-items:center;font-size:1.4rem;
  background:radial-gradient(circle at 30% 30%, rgba(255,210,74,.22), rgba(125,200,138,.12));
  color:var(--gold);margin-bottom:1rem;
}
.feature h3{font-size:1.18rem;margin-bottom:.45rem}
.feature p{color:var(--ink-dim);font-size:.98rem}
/* doplnkovy popisny blok pod kartami (autorovy vety) */
.feature-prose{max-width:var(--maxw);margin:2.4rem auto 0;display:grid;gap:1.05rem;text-align:center}
.feature-prose p{max-width:54em;margin:0 auto;color:var(--ink-dim);font-size:clamp(1rem,.72rem + .5vw,1.14rem)}

/* ----------------------- MODES ----------------------- */
.modes{background:linear-gradient(180deg,rgba(22,32,47,0),rgba(22,32,47,.45),rgba(22,32,47,0))}
.mode-grid{
  max-width:var(--maxw);margin:2.6rem auto 0;
  display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:1rem;
}
.mode-card{
  position:relative;border:1px solid var(--line);border-radius:14px;
  background:var(--panel-2); /* fallback pro prohlizece bez color-mix (starsi Safari) */
  background:color-mix(in srgb, var(--mode-accent,var(--blue)) 7%, var(--panel-2));
  padding:1.3rem 1.3rem 1.3rem 1.5rem;overflow:hidden;transition:transform .2s,border-color .2s;
}
.mode-card:hover{transform:translateY(-3px);border-color:rgba(138,184,216,.3)}
.mode-card::before{content:"";position:absolute;left:0;top:0;bottom:0;width:4px;background:var(--mode-accent,var(--blue))}
.mode-dot{position:absolute;right:1.1rem;top:1.1rem;width:.7rem;height:.7rem;border-radius:50%;background:var(--mode-accent,var(--blue));box-shadow:0 0 14px var(--mode-accent,var(--blue))}
.mode-card h3{font-size:1.1rem;margin-bottom:.3rem}
.mode-card p{color:var(--ink-dim);font-size:.94rem}

/* ----------------------- PRICING ----------------------- */
.pricing{background:linear-gradient(180deg,rgba(18,26,40,0),rgba(18,26,40,.5),rgba(18,26,40,0))}
.price-card{
  max-width:440px;margin:2.4rem auto 0;text-align:center;
  background:linear-gradient(180deg,var(--panel),var(--bg-soft));
  border:1px solid rgba(255,210,74,.28);border-radius:24px;padding:2.4rem 2rem;
  box-shadow:0 24px 60px rgba(0,0,0,.5), inset 0 1px 0 rgba(255,255,255,.04);
}
.price-head{display:flex;align-items:baseline;justify-content:center;gap:.5rem}
.price-amount{font-size:clamp(2.8rem,2rem + 3vw,3.8rem);font-weight:900;color:var(--gold);letter-spacing:-.02em}
.price-period{color:var(--ink-dim);font-size:1rem;font-weight:600}
.price-local{display:block;color:#7d90a6;font-size:.9rem;margin-top:.2rem}
.price-list{list-style:none;text-align:left;margin:1.6rem auto;max-width:300px;display:grid;gap:.7rem}
.price-list li{position:relative;padding-left:1.8rem;color:var(--ink);font-size:1rem}
.price-list li::before{content:"✓";position:absolute;left:0;top:0;color:var(--green);font-weight:900}
.price-try{display:inline-block;margin-top:1rem;color:var(--ink-dim);font-size:.95rem;border-bottom:1px dotted var(--line)}
.price-try:hover{color:var(--ink)}

/* ----------------------- FAQ ----------------------- */
.faq-list{max-width:760px;margin:2.4rem auto 0;display:grid;gap:.8rem}
.faq details{
  background:var(--panel-2);border:1px solid var(--line);border-radius:14px;padding:0 1.3rem;overflow:hidden;
  transition:border-color .2s;
}
.faq details[open]{border-color:rgba(138,184,216,.3)}
.faq summary{
  list-style:none;cursor:pointer;padding:1.1rem 0;font-weight:700;font-size:1.05rem;
  display:flex;align-items:center;justify-content:space-between;gap:1rem;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--gold);font-size:1.4rem;font-weight:400;transition:transform .2s;line-height:1}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq summary:focus-visible{outline:2px solid var(--gold);outline-offset:3px;border-radius:6px}
.faq p{color:var(--ink-dim);padding:0 0 1.2rem;font-size:1rem}

/* ----------------------- FOOTER ----------------------- */
.footer{border-top:1px solid var(--line);padding:2.4rem clamp(1rem,4vw,2.4rem);background:rgba(7,10,16,.6)}
.footer-inner{max-width:var(--maxw);margin:0 auto;display:flex;flex-wrap:wrap;align-items:center;gap:.7rem 1.2rem;justify-content:center;text-align:center}
.footer-brand{display:flex;align-items:center;gap:.45rem;font-weight:800;color:var(--ink)}
.footer-meta{display:flex;flex-wrap:wrap;align-items:center;gap:.6rem;color:var(--ink-dim);font-size:.95rem}
.footer-dot{opacity:.5}
.footer-credit{width:100%;text-align:center;color:var(--ink-faint);font-size:.86rem;margin-top:.3rem}
.footer-legal{width:100%;text-align:center;color:var(--ink-faint);font-size:.82rem;line-height:1.5;margin:.5rem auto 0;max-width:46em}
.footer-legal-links{width:100%;display:flex;flex-wrap:wrap;gap:.4rem .9rem;align-items:center;justify-content:center;margin-top:.5rem;font-size:.9rem}
.footer-ident{width:100%;text-align:center;color:var(--ink-faint);font-size:.82rem;line-height:1.55;margin:.35rem auto 0;max-width:52em}

/* ----------------------- souhlas u tlacitka Koupit ----------------------- */
.buy-consent{display:flex;gap:.6rem;align-items:flex-start;text-align:left;margin:.1rem 0 1rem;font-size:.8rem;color:var(--ink-dim);line-height:1.45;cursor:pointer}
.buy-consent input{margin-top:.15rem;width:1.15rem;height:1.15rem;flex-shrink:0;accent-color:var(--green);cursor:pointer}
.buy-consent.flash span{color:var(--gold)}
.buy-consent.flash input{outline:2px solid var(--gold);outline-offset:2px;border-radius:3px}

/* ----------------------- pravni stranky (privacy / podminky) ----------------------- */
.legal-head{display:flex;align-items:center;justify-content:space-between;gap:1rem;max-width:var(--maxw);margin:0 auto;padding:1.1rem clamp(1rem,4vw,2rem)}
.legal-main{max-width:820px;margin:0 auto;padding:clamp(1.2rem,3vw,2.4rem) clamp(1rem,4vw,2rem) 4rem}
.legal-main h1{font-size:clamp(1.55rem,1rem + 1.6vw,2.2rem);color:var(--ink);margin-bottom:.45rem;line-height:1.2}
.legal-lead{color:var(--ink-dim);margin-bottom:2rem;font-size:1rem}
.legal-main h2{font-size:clamp(1.08rem,.8rem + .7vw,1.32rem);color:var(--green);margin:2rem 0 .55rem}
.legal-main p,.legal-main li{color:var(--ink-dim);font-size:1rem;margin-bottom:.65rem}
.legal-main ul{padding-left:1.3rem;margin-bottom:.8rem}
.legal-main address{font-style:normal;color:var(--ink);background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:.9rem 1.15rem;margin:.3rem 0 1.1rem;line-height:1.7}
.legal-main a{border-bottom:1px dotted rgba(138,184,216,.5)}
.legal-updated{color:var(--ink-faint);font-size:.86rem;margin-top:2.5rem;border-top:1px solid var(--line);padding-top:1rem}
.legal-back{display:inline-block;margin-top:1.2rem;color:var(--blue);font-weight:600}

/* ----------------------- reveal-on-scroll ----------------------- */
/* Progressive enhancement: bez JS (nebo pri chybe JS) je obsah VIDITELNY.
   JS prida .rev-armed -> teprve pak se skryje a animuje pri scrollu. */
.reveal.rev-armed{opacity:0;transform:translateY(18px);transition:opacity .6s ease, transform .6s ease}
.reveal.rev-armed.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){.reveal.rev-armed{opacity:1;transform:none;transition:none}}

/* ----------------------- toast ----------------------- */
.toast{
  position:fixed;left:50%;bottom:2rem;transform:translateX(-50%) translateY(140%);
  background:var(--panel);color:var(--ink);border:1px solid rgba(255,210,74,.35);
  padding:.9em 1.3em;border-radius:14px;box-shadow:var(--shadow);font-size:.98rem;font-weight:600;
  max-width:min(90vw,420px);text-align:center;z-index:100;opacity:0;pointer-events:none;
  transition:transform .35s cubic-bezier(.2,.8,.2,1), opacity .35s;
}
.toast.show{transform:translateX(-50%) translateY(0);opacity:1}

/* ----------------------- responsivni ----------------------- */
@media (max-width:760px){
  .nav-menu{flex:0 0 auto}
  /* hamburger ≡ misto skrytych odkazu */
  .nav-menu>summary{
    display:inline-flex;align-items:center;justify-content:center;list-style:none;cursor:pointer;
    width:40px;height:40px;border-radius:10px;border:1px solid var(--line);color:var(--ink-dim);
    font-size:1.4rem;line-height:1;background:rgba(138,184,216,.06);
  }
  .nav-menu>summary::-webkit-details-marker{display:none}
  .nav-menu>summary:focus-visible{outline:2px solid var(--gold);outline-offset:2px}
  .nav-menu .nav-links{display:none}
  .nav-menu[open] .nav-links{
    display:flex;flex-direction:column;gap:.2rem;margin:0;
    position:absolute;top:100%;left:0;right:0;
    background:rgba(7,10,16,.97);
    backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);
    border-bottom:1px solid var(--line);padding:.6rem clamp(1rem,4vw,2.4rem) 1rem;
  }
  .nav-menu[open] .nav-links a{padding:.7rem .2rem;font-size:1.05rem;min-height:44px;display:flex;align-items:center}
  .nav-actions{margin-left:auto}
  .hero{min-height:min(78vh,620px);padding-top:2.4rem}
  .hero-vignette{background:linear-gradient(0deg, var(--bg) 8%, rgba(7,10,16,.45) 45%, rgba(7,10,16,.7) 100%)}
  .hero-copy{max-width:100%}
  /* mobil/uzke okno: na dotyku se Lite stejne otevira v nove karte (wakeHero coarse vetev);
     plovouci "Ozivit ukazku" by jen prekryvalo poznamku a matlo (slibuje inline ozit) -> skryt.
     Zivou ukazku na mobilu spousti jasne popsane CTA "Vyzkouset zdarma". */
  .poster-play{display:none}
}
@media (max-width:420px){
  .nav-try{display:none}
}
/* dotykova zarizeni: zvetsit drobne tap-cile na >=44px (desktop pointer:fine netknut) */
@media (pointer:coarse){
  .lang-toggle{min-height:44px;padding:.5em .9em}
  .price-try{display:inline-block;padding:.5em .2em;min-height:44px}
  .footer-meta a{display:inline-block;padding:.35em .1em}
  /* siroke dotykove tablety (>760px, coarse): tady taky Lite jede v nove karte -> skryt plovouci tlacitko */
  .poster-play{display:none}
}