/* ===========================================================
   ef-de s.r.o. — Landing page styles
   Font: Kanit (Google Fonts) | Brand colors: Royal/Sailor/Azure Blue
   =========================================================== */

:root{
  --royal-blue:#005C9B;
  --sailor-blue:#1C71A0;
  --azure-blue:#1182C4;
  --navy:#071B2B;
  --ink:#0B2033;
  --gray:#5B6E7C;
  --gray-light:#8FA1AC;
  --bg-light:#F3F8FB;
  --border:#DFE9EF;
  --white:#FFFFFF;
  --radius:16px;
  --shadow-sm:0 2px 10px rgba(7,27,43,.06);
  --shadow-md:0 12px 34px rgba(7,27,43,.10);
  --shadow-lg:0 24px 60px rgba(7,27,43,.16);
  --container:1180px;
}

*,*::before,*::after{box-sizing:border-box;}
[hidden]{display:none!important;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"Kanit", "Segoe UI", sans-serif;
  color:var(--ink);
  background:var(--white);
  -webkit-font-smoothing:antialiased;
  line-height:1.6;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
ul,dl{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{font-weight:700;line-height:1.15;margin:0 0 .5em;color:var(--navy);}
p{margin:0 0 1em;}
.container{max-width:var(--container);margin:0 auto;padding:0 24px;}

.skip-link{
  position:absolute;left:-999px;top:0;background:var(--royal-blue);color:#fff;
  padding:12px 18px;z-index:2000;border-radius:0 0 8px 0;
}
.skip-link:focus{left:0;}

/* ===== Buttons ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  padding:14px 28px;border-radius:999px;font-weight:600;font-size:15px;
  border:2px solid transparent;cursor:pointer;transition:transform .18s ease,box-shadow .18s ease,background .18s ease,color .18s ease;
  white-space:nowrap;
}
.btn:hover{transform:translateY(-2px);}
.btn-primary{background:linear-gradient(135deg,var(--royal-blue),var(--azure-blue));color:#fff;box-shadow:var(--shadow-sm);}
.btn-primary:hover{box-shadow:var(--shadow-md);}
.btn-light{background:#fff;color:var(--royal-blue);}
.btn-light:hover{box-shadow:0 14px 30px rgba(0,0,0,.18);}
.btn-outline-light{border-color:rgba(255,255,255,.6);color:#fff;}
.btn-outline-light:hover{background:rgba(255,255,255,.12);}
.btn-outline{border-color:var(--border);color:var(--ink);background:transparent;}
.btn-outline:hover{border-color:var(--azure-blue);color:var(--azure-blue);}
.btn-full{width:100%;}
.btn-small{padding:10px 18px;font-size:13px;}
.btn-nav{padding:10px 22px;}
/* Nad modrým hero pozadím musí mať CTA vlastný kontrast, inak splýva s pozadím */
.main-nav .btn-nav{
  background:rgba(255,255,255,.12);
  border:1.5px solid rgba(255,255,255,.7);
  color:#fff;
  box-shadow:none;
}
.main-nav .btn-nav:hover{background:rgba(255,255,255,.22);}
.site-header.scrolled .main-nav .btn-nav{
  background:linear-gradient(135deg,var(--royal-blue),var(--azure-blue));
  border-color:transparent;
  color:#fff;
  box-shadow:var(--shadow-sm);
}

/* ===== Header / Nav ===== */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:1200;
  transition:padding .25s ease;
  padding:18px 0;
}
/* Rozostrené pozadie je na samostatnej vrstve za obsahom hlavičky,
   aby sa backdrop-filter nedotýkal zaoblených rohov CTA tlačidla
   (v niektorých prehliadačoch to pri priamej kombinácii spôsobuje
   viditeľný "šev" presne na najviac zaoblených miestach). */
.site-header::before{
  content:"";
  position:absolute;inset:0;
  z-index:-1;
  background:transparent;
  transition:background .25s ease,box-shadow .25s ease;
}
.site-header.scrolled::before{
  background:rgba(255,255,255,.92);
  backdrop-filter:blur(10px);
  box-shadow:var(--shadow-sm);
}
.site-header.scrolled{
  padding:10px 0;
}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;}
.brand{display:flex;align-items:center;}
.brand-logo{
  height:34px;width:auto;
  filter:brightness(0) invert(1); /* biele nad modrým hero pozadím */
  transition:filter .25s ease;
}
.site-header.scrolled .brand-logo{filter:none;} /* farebné, keď má header biele pozadie */
.main-nav{display:flex;align-items:center;gap:30px;}
.main-nav a{font-weight:500;font-size:15px;color:#fff;transition:color .2s ease;}
.site-header.scrolled .main-nav a{color:var(--ink);}
.main-nav a:hover{color:var(--azure-blue);}
.main-nav a.btn{color:#fff;}
.nav-toggle{
  display:none;flex-direction:column;justify-content:center;gap:5px;
  width:38px;height:38px;background:transparent;border:none;cursor:pointer;padding:0;
  position:relative;z-index:1200;
}
.nav-toggle span{display:block;height:2px;width:100%;background:#fff;border-radius:2px;transition:.25s ease;transform-origin:center;}
.site-header.scrolled .nav-toggle span{background:var(--ink);}
/* Keď je mobilné menu otvorené, tlačidlo sedí pri bielom paneli, preto musí byť tmavé
   a premeniť sa na "X", aby bolo vždy vidno, ako menu zavrieť. */
.nav-toggle.open span{background:var(--ink);}
.nav-toggle.open span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.nav-toggle.open span:nth-child(2){opacity:0;}
.nav-toggle.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

/* ===== Hero ===== */
.hero{
  position:relative;min-height:100vh;display:flex;align-items:center;
  background:linear-gradient(135deg,var(--royal-blue) 0%,var(--sailor-blue) 50%,var(--azure-blue) 100%);
  background-size:220% 220%;
  animation:heroGradient 16s ease infinite;
  overflow:hidden;color:#fff;padding-top:120px;padding-bottom:80px;
}
@keyframes heroGradient{
  0%{background-position:0% 40%;}
  50%{background-position:100% 60%;}
  100%{background-position:0% 40%;}
}
.hero-bg{position:absolute;inset:0;overflow:hidden;pointer-events:none;}
.cube{position:absolute;border-radius:20%;opacity:.16;background:#fff;transform:rotate(20deg);}
.cube-1{width:340px;height:340px;top:-100px;right:-80px;transform:rotate(18deg);animation:floatCube1 12s ease-in-out infinite;}
.cube-2{width:220px;height:220px;bottom:-60px;right:22%;transform:rotate(45deg);opacity:.12;animation:floatCube2 15s ease-in-out infinite;}
.cube-3{width:160px;height:160px;bottom:15%;left:-60px;transform:rotate(12deg);opacity:.14;animation:floatCube3 18s ease-in-out infinite;}
@keyframes floatCube1{0%,100%{transform:rotate(18deg) translateY(0);}50%{transform:rotate(23deg) translateY(-22px);}}
@keyframes floatCube2{0%,100%{transform:rotate(45deg) translateY(0);}50%{transform:rotate(40deg) translateY(18px);}}
@keyframes floatCube3{0%,100%{transform:rotate(12deg) translateY(0);}50%{transform:rotate(17deg) translateY(-16px);}}
.hero-inner{position:relative;z-index:2;max-width:900px;}
.eyebrow,.section-eyebrow{
  text-transform:uppercase;letter-spacing:.14em;font-size:13px;font-weight:600;
  color:rgba(255,255,255,.85);margin-bottom:16px;
}
.hero .eyebrow{font-size:16px;margin-bottom:20px;}
.section-eyebrow{color:var(--azure-blue);}
.hero h1{font-size:clamp(44px,7.5vw,80px);color:#fff;margin-bottom:26px;}
.hero h1 span{color:#fff;background:linear-gradient(120deg,#fff,#CFEBFF);-webkit-background-clip:text;background-clip:text;}
.hero-lead{font-size:22px;color:rgba(255,255,255,.92);max-width:660px;margin-bottom:44px;}
.hero-actions{display:flex;gap:20px;flex-wrap:wrap;}
.hero-actions .btn{font-size:18px;padding:18px 36px;}

/* Hero entrance animation */
@keyframes fadeUp{from{opacity:0;transform:translateY(22px);}to{opacity:1;transform:translateY(0);}}
.hero .eyebrow{animation:fadeUp .8s ease both;}
.hero h1{animation:fadeUp .8s ease .12s both;}
.hero-lead{animation:fadeUp .8s ease .24s both;}
.hero-actions{animation:fadeUp .8s ease .36s both;}

/* Scroll cue */
.scroll-cue{position:absolute;left:50%;bottom:100px;transform:translateX(-50%);z-index:3;animation:fadeUp .8s ease .6s both;}
.scroll-cue span{display:block;width:22px;height:36px;border:2px solid rgba(255,255,255,.55);border-radius:20px;position:relative;}
.scroll-cue span::before{content:"";position:absolute;top:6px;left:50%;width:4px;height:8px;background:#fff;border-radius:2px;transform:translateX(-50%);animation:scrollDot 1.8s ease infinite;}
@keyframes scrollDot{0%{opacity:1;top:6px;}70%{opacity:0;top:20px;}100%{opacity:0;top:6px;}}
/* Pri nižších oknách (bežné notebooky) sa hero obsah vycentruje bližšie k spodku
   a scroll-cue by kolidovala s tlačidlami — na takých výškach ju radšej skryjeme. */
@media (max-height:820px){
  .scroll-cue{display:none;}
}

/* Hero wave divider into next section */
.hero-wave{position:absolute;left:0;right:0;bottom:-1px;line-height:0;z-index:2;}
.hero-wave svg{display:block;width:100%;height:70px;}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important;scroll-behavior:auto!important;}
}

/* ===== Sections ===== */
.section{padding:110px 0;}
.section-alt{position:relative;overflow:hidden;background:transparent;}
.section-alt::before{
  content:"";position:absolute;left:0;right:0;top:-120px;bottom:-120px;
  background:var(--bg-light);transform:skewY(-1.6deg);z-index:0;
}
.section-alt>.container{position:relative;z-index:1;}
.center{text-align:center;}
.section h2{font-size:clamp(28px,3.6vw,40px);}
.section h2.center,.section p.section-eyebrow.center{margin-left:auto;margin-right:auto;}
.section > .container > h2.center{max-width:640px;}
.section-lead{color:var(--gray);font-size:17px;max-width:640px;margin:18px auto 0;}

/* About */
.about-grid{display:grid;grid-template-columns:1.5fr 1fr;gap:60px;align-items:start;}
.about-copy h2{max-width:560px;}
.about-copy p{font-size:17px;}
.about-copy p{color:var(--gray);max-width:560px;}
.about-stats{display:grid;gap:24px;}
.stat{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:26px 24px;box-shadow:var(--shadow-sm);}
.stat-num{display:block;font-size:34px;font-weight:800;color:var(--royal-blue);}
.stat-label{color:var(--gray);font-size:14px;}

/* Services */
.services-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px;margin-top:50px;}
.service-card{
  background:#fff;border:1px solid var(--border);border-radius:var(--radius);
  padding:34px 28px;box-shadow:var(--shadow-sm);transition:transform .25s ease,box-shadow .25s ease;
}
.service-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-md);}
.service-icon{
  width:56px;height:56px;border-radius:14px;
  background:linear-gradient(135deg,var(--royal-blue),var(--azure-blue));
  color:#fff;display:flex;align-items:center;justify-content:center;margin-bottom:20px;
  box-shadow:inset 0 1px 0 rgba(255,255,255,.35),0 8px 20px rgba(0,92,155,.22);
  transition:transform .3s ease,box-shadow .3s ease;
}
.service-icon svg{width:28px;height:28px;}
.service-card:hover .service-icon{transform:scale(1.08) rotate(-4deg);box-shadow:0 10px 24px rgba(0,92,155,.35);}
.service-card h3{font-size:19px;margin-bottom:10px;}
.service-card p{color:var(--gray);font-size:15px;margin:0;}

/* Why */
.why-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:28px;margin-top:50px;}
.why-item{
  background:#fff;border:1px solid var(--border);border-radius:var(--radius);
  padding:34px 32px;box-shadow:var(--shadow-sm);transition:transform .25s ease,box-shadow .25s ease;
  display:flex;gap:22px;align-items:flex-start;
}
.why-item:hover{transform:translateY(-6px);box-shadow:var(--shadow-md);}
.why-num{
  flex-shrink:0;width:52px;height:52px;border-radius:50%;
  background:linear-gradient(135deg,var(--royal-blue),var(--azure-blue));
  color:#fff;font-size:18px;font-weight:700;letter-spacing:0;
  display:flex;align-items:center;justify-content:center;
  transition:transform .3s ease;
}
.why-item:hover .why-num{transform:scale(1.1);}
.why-content{flex:1;min-width:0;}
.why-item h3{margin-top:0;margin-bottom:10px;font-size:22px;}
.why-item p{color:var(--gray);font-size:17px;margin:0;}

/* Process ("Ako pracujeme") */
.process-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:28px;margin-top:60px;position:relative;}
.process-grid::before{
  content:"";position:absolute;top:26px;left:0;right:0;height:2px;
  background:linear-gradient(90deg,transparent,var(--border) 10%,var(--border) 90%,transparent);z-index:0;
}
.process-step{position:relative;z-index:1;text-align:center;}
.process-num{
  width:52px;height:52px;border-radius:50%;
  background:linear-gradient(135deg,var(--royal-blue),var(--azure-blue));
  color:#fff;font-weight:700;font-size:18px;display:flex;align-items:center;justify-content:center;
  margin:0 auto 20px;box-shadow:var(--shadow-sm);transition:transform .3s ease;
}
.process-step:hover .process-num{transform:scale(1.1);}
.process-step h3{font-size:18px;margin-bottom:8px;}
.process-step p{color:var(--gray);font-size:15px;margin:0;}
@media (max-width:760px){
  .process-grid{grid-template-columns:1fr;gap:36px;}
  .process-grid::before{display:none;}
}

/* Naši klienti */
.clients-grid{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:center;
  gap:20px;margin-top:52px;
}
.client-logo{
  display:flex;align-items:center;justify-content:center;
  width:160px;height:88px;padding:16px 22px;
  background:#fff;border:1px solid var(--border);border-radius:14px;
  box-shadow:var(--shadow-sm);
  transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
}
.client-logo:hover,.client-logo:focus-visible{
  transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:var(--azure-blue);
}
.client-logo img{
  max-width:100%;max-height:100%;width:auto;height:auto;object-fit:contain;
  filter:grayscale(1);opacity:.55;
  transition:filter .25s ease,opacity .25s ease;
}
.client-logo:hover img,.client-logo:focus-visible img{
  filter:grayscale(0);opacity:1;
}
@media (max-width:600px){
  .client-logo{width:132px;height:76px;padding:12px 18px;}
}

/* FAQ */
.faq-list{max-width:820px;margin:50px auto 0;display:grid;gap:14px;}
.faq-item{
  background:#fff;border:1px solid var(--border);border-radius:14px;
  padding:6px 24px;box-shadow:var(--shadow-sm);transition:box-shadow .25s ease;
}
.faq-item[open]{box-shadow:var(--shadow-md);}
.faq-item summary{
  cursor:pointer;list-style:none;display:flex;align-items:center;justify-content:space-between;
  gap:16px;padding:18px 0;font-weight:600;font-size:16px;color:var(--ink);
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{
  content:"+";font-size:22px;font-weight:400;color:var(--azure-blue);
  transition:transform .25s ease;flex-shrink:0;
}
.faq-item[open] summary::after{transform:rotate(45deg);}
.faq-item p{color:var(--gray);font-size:15px;padding-bottom:20px;margin:0;}

/* Contact */
.contact-grid{display:grid;grid-template-columns:1fr 1.15fr;gap:60px;align-items:start;}
.contact-lead{color:var(--gray);max-width:440px;}
.contact-list{margin:28px 0;display:grid;gap:14px;}
.contact-list li{display:flex;gap:10px;align-items:baseline;font-size:16px;}
.contact-label{color:var(--gray);font-size:13px;text-transform:uppercase;letter-spacing:.06em;min-width:80px;}
.contact-list a{font-weight:600;color:var(--royal-blue);}
.contact-list a:hover{text-decoration:underline;}

.invoice-box{
  background:#fff;border:1px solid var(--border);border-radius:var(--radius);
  padding:26px 28px;box-shadow:var(--shadow-sm);
}
.invoice-box h3{font-size:16px;margin-bottom:16px;}
.invoice-box dl{display:grid;grid-template-columns:auto 1fr;gap:8px 18px;}
.invoice-box dt{color:var(--gray);font-size:13px;}
.invoice-box dd{margin:0;font-size:14px;font-weight:500;}

/* Form */
.contact-form-wrap{
  background:#fff;border:1px solid var(--border);border-radius:20px;
  padding:36px;box-shadow:var(--shadow-md);
}
.form-row{margin-bottom:22px;}
.form-row-split{display:grid;grid-template-columns:1fr 1fr;gap:18px;}
label,legend{display:block;font-weight:600;font-size:14px;margin-bottom:8px;color:var(--ink);}
fieldset{border:none;padding:0;margin:0;}
input[type=text],input[type=tel],input[type=email],textarea{
  width:100%;padding:13px 16px;border:1.5px solid var(--border);border-radius:10px;
  font-family:inherit;font-size:15px;color:var(--ink);background:var(--bg-light);
  transition:border-color .2s ease,background .2s ease;
}
input:focus,textarea:focus{outline:none;border-color:var(--azure-blue);background:#fff;}
input[readonly]{cursor:pointer;background:#EDF4F8;}
textarea{resize:vertical;}
.checkbox-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:4px;}
.checkbox-item{
  display:flex;align-items:flex-start;gap:10px;font-weight:400;font-size:14.5px;
  border:1.5px solid var(--border);border-radius:10px;padding:12px 14px;cursor:pointer;
  transition:border-color .2s ease,background .2s ease;background:var(--bg-light);
}
.checkbox-item:has(input:checked){border-color:var(--azure-blue);background:#EAF5FC;}
.checkbox-item input{margin-top:3px;accent-color:var(--royal-blue);width:16px;height:16px;flex-shrink:0;}
.consent-row{background:transparent;border:none;padding:0;}
.consent-row .checkbox-item{background:transparent;border:none;padding:0;}
.consent-row a{color:var(--royal-blue);font-weight:600;}
.consent-row a:hover{text-decoration:underline;}
.field-error{color:#C4372B;font-size:13px;margin:8px 0 0;display:none;}
.field-error.visible{display:block;}
.form-status{
  display:none;padding:16px 18px;border-radius:10px;margin-top:18px;font-size:15px;font-weight:500;text-align:center;
}
.form-status.visible{display:block;}
.form-status.success{background:#E4F6EA;color:#1E7A3D;}
.form-status.error{background:#FCEAEA;color:#B02A20;}

/* Modal */
.modal-overlay{
  position:fixed;inset:0;background:rgba(7,27,43,.55);z-index:2000;
  display:flex;align-items:center;justify-content:center;padding:20px;
}
.modal-box{
  background:#fff;border-radius:18px;padding:30px;max-width:440px;width:100%;
  box-shadow:var(--shadow-lg);
}
.modal-box h3{margin-bottom:8px;}
.modal-box p{color:var(--gray);font-size:14px;}
.modal-box textarea{margin-top:6px;}
.modal-actions{display:flex;justify-content:flex-end;gap:12px;margin-top:20px;}

/* Cookie banner */
.cookie-banner{
  position:fixed;left:20px;right:20px;bottom:20px;z-index:1500;
  background:#fff;border:1px solid var(--border);border-radius:16px;
  box-shadow:var(--shadow-lg);padding:20px 24px;
  display:flex;align-items:center;gap:24px;flex-wrap:wrap;
  max-width:900px;margin:0 auto;
}
.cookie-text{flex:1;min-width:240px;font-size:14px;color:var(--gray);}
.cookie-text a{color:var(--royal-blue);font-weight:600;}
.cookie-actions{display:flex;gap:10px;flex-shrink:0;}

/* Footer */
.site-footer{background:var(--navy);color:#C6D5DE;padding-top:70px;}
.footer-inner{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px;padding-bottom:50px;}
.footer-logo{height:30px;width:auto;margin-bottom:16px;}
.footer-brand p{color:#8CA3B0;font-size:14px;}
.footer-social{display:flex;gap:14px;margin-top:18px;}
.footer-social a{
  width:36px;height:36px;border-radius:50%;background:rgba(255,255,255,.08);
  display:flex;align-items:center;justify-content:center;color:#C6D5DE;
  transition:background .2s ease,color .2s ease;
}
.footer-social a:hover{background:var(--azure-blue);color:#fff;}
.footer-col h4{color:#fff;font-size:14px;text-transform:uppercase;letter-spacing:.06em;margin-bottom:16px;}
.footer-col{display:flex;flex-direction:column;gap:10px;font-size:14.5px;}
.footer-col a:hover{color:#fff;}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding:20px 0;}
.footer-bottom p{margin:0;font-size:13px;color:#8CA3B0;}

/* Reveal animation */
.reveal{opacity:0;transform:translateY(24px);transition:opacity .7s ease,transform .7s ease;}
.reveal.visible{opacity:1;transform:none;}

/* ===== Responsive ===== */
@media (max-width:980px){
  .about-grid,.contact-grid{grid-template-columns:1fr;}
  .services-grid{grid-template-columns:repeat(2,1fr);}
  .why-grid{grid-template-columns:repeat(2,1fr);}
  .footer-inner{grid-template-columns:1fr 1fr;}
}
@media (max-width:760px){
  .main-nav{
    position:fixed;top:0;right:0;height:100vh;width:78vw;max-width:320px;
    background:#fff;flex-direction:column;align-items:flex-start;justify-content:flex-start;
    padding:100px 30px 30px;gap:22px;box-shadow:var(--shadow-lg);
    transform:translateX(100%);transition:transform .3s ease;
  }
  .main-nav{z-index:1100;}
  .main-nav.open{transform:translateX(0);}
  .main-nav a{color:var(--ink)!important;font-size:17px;}
  .nav-toggle{display:flex;}
  .btn-nav{width:100%;}
  /* Panel mobilného menu je vždy biely, takže CTA musí byť vždy plné modré,
     nielen keď je header prescrollovaný (inak splýva s bielym pozadím panelu). */
  .main-nav .btn-nav{
    background:linear-gradient(135deg,var(--royal-blue),var(--azure-blue));
    border-color:transparent;
    color:#fff;
    box-shadow:var(--shadow-sm);
  }
  .main-nav .btn-nav:hover{background:linear-gradient(135deg,var(--royal-blue),var(--azure-blue));filter:brightness(1.08);}
  .nav-backdrop{
    display:none;position:fixed;inset:0;background:rgba(7,27,43,.4);z-index:1050;
    opacity:0;transition:opacity .3s ease;
  }
  .nav-backdrop.visible{display:block;opacity:1;}
  .services-grid{grid-template-columns:1fr;}
  .why-grid{grid-template-columns:1fr;}
  .form-row-split{grid-template-columns:1fr;}
  .checkbox-grid{grid-template-columns:1fr;}
  .footer-inner{grid-template-columns:1fr;}
  .section{padding:70px 0;}
  .hero{padding-top:110px;}
  .scroll-cue{display:none;}
}