/* Jasný krok — bold minimalist. Off-white + near-black + lime. Vlastný skelet. */
:root{
  --bg:#f3f3ee; --panel:#ffffff; --ink:#0e0e10; --muted:#5c5c60; --line:#e0e0d8;
  --lime:#a6e22e; --lime-d:#7fbf12; --dark:#101012;
  --wrap:1160px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font-size:17px;line-height:1.6;
  font-family:"Segoe UI",system-ui,-apple-system,Roboto,Arial,sans-serif}
img{max-width:100%;display:block;height:auto;object-fit:cover;border-radius:4px}
a{color:var(--ink);text-decoration:none}
h1,h2,h3{margin:0 0 .4em;line-height:1.05;color:var(--ink);font-weight:900;letter-spacing:-.03em}
h1{font-size:3.6rem}h2{font-size:2.3rem}h3{font-size:1.2rem}
h1 span{background:var(--lime);padding:0 .12em;box-decoration-break:clone;-webkit-box-decoration-break:clone}
p{margin:0 0 1em}
.jk-wrap{max-width:var(--wrap);margin:0 auto;padding:0 26px}
.jk-narrow{max-width:800px}
.skip{position:absolute;left:-999px}.skip:focus{left:12px;top:12px;background:var(--lime);color:#000;padding:10px;z-index:99}
.jk-eyebrow{text-transform:uppercase;letter-spacing:.2em;font-size:.72rem;font-weight:800;color:var(--lime-d);margin:0 0 1em}
.jk-eyebrow-l{color:var(--lime)}

/* Header */
.jk-head{position:sticky;top:0;z-index:50;background:rgba(243,243,238,.92);backdrop-filter:blur(9px);border-bottom:2px solid var(--ink)}
.jk-head-in{display:flex;align-items:center;justify-content:space-between;height:68px}
.jk-logo{font-weight:900;font-size:1.25rem;letter-spacing:-.04em;color:var(--ink);display:flex;align-items:center}
.jk-logo span{background:var(--lime);padding:0 4px;margin-left:1px}
.jk-logo i{font-style:normal;margin-left:6px;color:var(--lime-d)}
.jk-nav{display:flex;align-items:center;gap:26px}
.jk-nav a{color:var(--muted);font-size:.96rem;font-weight:600}
.jk-nav a:hover{color:var(--ink)}
.jk-nav-cta{color:var(--ink)!important;background:var(--lime);padding:9px 18px;font-weight:800}
.jk-nav-cta:hover{background:var(--lime-d)}
.jk-burger{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:8px}
.jk-burger span{width:26px;height:3px;background:var(--ink)}

/* Buttons — sharp */
.jk-btn{display:inline-block;padding:15px 30px;font-weight:800;cursor:pointer;border:0;font-size:1rem;transition:.14s;border-radius:0}
.jk-btn-a{background:var(--lime);color:var(--ink)}
.jk-btn-a:hover{background:var(--ink);color:var(--lime)}
.jk-btn-b{background:transparent;color:var(--ink);border:2px solid var(--ink)}
.jk-btn-b:hover{background:var(--ink);color:#fff}
.jk-btn-full{width:100%}

/* Hero */
.jk-hero{padding:66px 0 60px}
.jk-hero-in{display:grid;grid-template-columns:1.15fr .85fr;gap:50px;align-items:center}
.jk-lead{font-size:1.24rem;color:var(--muted);max-width:52ch}
.jk-hero-cta{display:flex;gap:14px;flex-wrap:wrap;margin-top:30px}
.jk-hero-fig img{width:100%;aspect-ratio:9/10;border-radius:0;border:3px solid var(--ink)}

/* Strip */
.jk-strip{background:var(--ink);color:#f3f3ee;padding:46px 0}
.jk-strip-txt{font-size:1.7rem;font-weight:800;line-height:1.35;max-width:1000px;margin:0;letter-spacing:-.02em}
.jk-strip-txt span{color:var(--lime)}

/* Sections */
.jk-sec{padding:70px 0}
.jk-soft{background:#eaeae2}
.jk-dark{background:var(--dark);color:#f3f3ee}
.jk-dark h2{color:#fff}
.jk-sec-head{max-width:720px;margin:0 0 40px}
.jk-sec-head-c{max-width:640px;margin:0 auto 40px;text-align:center}
.jk-sec-sub{color:var(--muted);font-size:1.08rem}
.jk-dark .jk-sec-sub{color:#b7b7b0}

/* Cards */
.jk-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:0;border-top:2px solid var(--ink);border-left:2px solid var(--ink)}
.jk-card{border-right:2px solid var(--ink);border-bottom:2px solid var(--ink);padding:28px 26px;background:var(--panel);transition:.15s}
.jk-card:hover{background:var(--lime)}
.jk-card-n{font-weight:900;font-size:1.4rem;color:var(--lime-d)}
.jk-card:hover .jk-card-n{color:var(--ink)}
.jk-card h3{margin:.3em 0 .3em}
.jk-card p{color:var(--muted);margin:0;font-size:.96rem}
.jk-card:hover p{color:var(--ink)}

/* Wizard */
.jk-wizard{max-width:720px;margin:0 auto;background:#1a1a1d;border:2px solid #2e2e33;padding:36px 40px}
.jk-wz-bar{height:6px;background:#2e2e33;margin-bottom:30px}
.jk-wz-fill{display:block;height:100%;width:33%;background:var(--lime);transition:width .3s}
.jk-wz-step{display:none}
.jk-wz-step.is-on{display:block}
.jk-wz-q{font-size:1.3rem;font-weight:800;color:#fff;margin-bottom:22px}
.jk-wz-opts{display:grid;gap:12px}
.jk-wz-opt{text-align:left;background:#242428;border:2px solid #34343a;color:#f3f3ee;padding:16px 20px;font:inherit;font-weight:600;cursor:pointer;transition:.14s}
.jk-wz-opt:hover{border-color:var(--lime);color:#fff}
.jk-wz-result{text-align:center}
.jk-wz-tag{display:inline-block;background:var(--lime);color:var(--ink);font-weight:800;text-transform:uppercase;letter-spacing:.12em;font-size:.72rem;padding:6px 14px;margin-bottom:18px}
.jk-wz-out{font-size:1.35rem;font-weight:700;color:#fff;line-height:1.4;margin-bottom:24px}

/* Split */
.jk-split{display:grid;grid-template-columns:1fr 1fr;align-items:center;gap:0;max-width:var(--wrap);margin:0 auto;padding:0 26px}
.jk-split-txt{padding:56px 44px 56px 0}
.jk-split-fig img{width:100%;aspect-ratio:17/15;border-radius:0;border:3px solid var(--ink)}
.jk-checks{list-style:none;padding:0;margin:1em 0 0}
.jk-checks li{padding:9px 0 9px 30px;position:relative;color:var(--muted);font-weight:600}
.jk-checks li::before{content:"→";position:absolute;left:0;color:var(--lime-d);font-weight:900}

/* Princípy */
.jk-princ{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.jk-pr b{font-size:2.2rem;font-weight:900;color:var(--lime-d);display:block;line-height:1}
.jk-pr h3{margin:.35em 0 .25em}
.jk-pr p{color:var(--muted);margin:0;font-size:.95rem}

/* Tips */
.jk-tips{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.jk-tip{background:var(--panel);border:2px solid var(--ink);padding:24px 26px}
.jk-tip h3{margin-bottom:.25em}
.jk-tip p{color:var(--muted);margin:0;font-size:.95rem}

/* Gallery */
.jk-gal{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
.jk-gal img{width:100%;aspect-ratio:5/4;border-radius:0;filter:grayscale(1);transition:.2s}
.jk-gal img:hover{filter:grayscale(0)}

/* Situations */
.jk-sit{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.jk-sit-c{background:var(--panel);border:2px solid var(--ink);overflow:hidden}
.jk-sit-c img{border-radius:0;aspect-ratio:19/12}
.jk-sit-c h3{margin:16px 22px .2em}
.jk-sit-c p{margin:0 22px 22px;color:var(--muted);font-size:.95rem}

/* Band */
.jk-band{background:var(--lime);color:var(--ink);padding:56px 0}
.jk-band-in{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center}
.jk-band-txt p{margin:0;color:#33420a;font-weight:600}
.jk-form-row{display:grid;grid-template-columns:1fr auto;gap:12px}
.jk-form-row .jk-consent,.jk-form-row .jk-msg{grid-column:1/-1}

/* Forms */
.jk-form input,.jk-form textarea{width:100%;padding:14px 16px;border:2px solid var(--ink);border-radius:0;font:inherit;background:#fff;color:var(--ink)}
.jk-form input:focus,.jk-form textarea:focus{outline:none;border-color:var(--lime-d)}
.jk-form label{display:block;font-weight:700;margin-bottom:16px;font-size:.93rem}
.jk-form label input,.jk-form label textarea{margin-top:7px;font-weight:400}
.jk-f2{display:grid;grid-template-columns:1fr 1fr;gap:0 16px}
.jk-consent{display:flex!important;align-items:flex-start;gap:9px;font-weight:400!important;font-size:.88rem;color:var(--muted)}
.jk-band .jk-consent{color:#33420a}
.jk-consent input{width:auto!important;margin-top:3px}
.jk-msg{min-height:1.2em;font-weight:700;margin:6px 0 0}
.jk-msg.ok{color:var(--lime-d)} .jk-band .jk-msg.ok{color:#1c2b00} .jk-msg.err{color:#c0392b}

/* FAQ */
.jk-faq details{background:var(--panel);border:2px solid var(--ink);margin-bottom:10px;padding:2px 22px}
.jk-faq summary{cursor:pointer;font-weight:800;padding:16px 30px 16px 0;list-style:none;position:relative;font-size:1.05rem}
.jk-faq summary::after{content:"+";position:absolute;right:2px;top:12px;color:var(--lime-d);font-size:1.5rem;font-weight:900}
.jk-faq details[open] summary::after{content:"–"}
.jk-faq p{color:var(--muted);margin:0 0 16px}

/* Contact */
.jk-contact{display:grid;grid-template-columns:1fr 1fr;gap:46px;align-items:start}
.jk-contact-txt p{color:var(--muted)}

/* Footer */
.jk-foot{background:var(--ink);color:#a7a7a0;padding:46px 0 0}
.jk-foot-in{display:flex;justify-content:space-between;gap:30px;flex-wrap:wrap;padding-bottom:26px;border-bottom:1px solid #2e2e33}
.jk-foot-brand{max-width:420px}
.jk-foot .jk-logo{color:#fff}
.jk-foot-brand p{color:#8a8a82;font-size:.94rem;margin:.5em 0 0}
.jk-foot-links{display:flex;gap:20px;flex-wrap:wrap;align-items:center}
.jk-foot-links a{color:#b7b7b0;font-size:.92rem}
.jk-foot-links a:hover{color:var(--lime)}
.jk-foot-b{padding:16px 26px;font-size:.85rem;color:#66665f}
.jk-foot-b p{margin:0}

/* Cookie */
.jk-cookie{position:fixed;left:16px;right:16px;bottom:16px;max-width:640px;margin:0 auto;background:var(--ink);color:#f3f3ee;border:2px solid var(--lime);padding:16px 22px;display:flex;gap:16px;align-items:center;justify-content:space-between;z-index:80}
.jk-cookie p{margin:0;font-size:.9rem;color:#cececa}
.jk-cookie a{color:var(--lime)}

/* Legal */
.jk-legal{max-width:800px;margin:0 auto;padding:46px 26px 70px}
.jk-legal h1{font-size:2.3rem}
.jk-legal h2{font-size:1.3rem;margin:1.4em 0 .4em}
.jk-legal p,.jk-legal li{color:var(--muted)}
.jk-legal a.back{display:inline-block;margin-bottom:22px;color:var(--lime-d);font-weight:800}
.jk-legal .ftab{width:100%;border-collapse:collapse;font-size:.88rem;margin-top:14px}
.jk-legal .ftab th,.jk-legal .ftab td{text-align:left;padding:8px 10px;border-bottom:1px solid var(--line);vertical-align:top;color:var(--muted)}
.jk-legal .ftab th{color:var(--ink)} .jk-legal .ftab code{font-size:.8rem;color:var(--lime-d)}

/* Responsive */
@media(max-width:940px){
  h1{font-size:2.6rem}h2{font-size:1.8rem}
  .jk-hero-in,.jk-split,.jk-band-in,.jk-contact{grid-template-columns:1fr}
  .jk-hero-fig{order:-1}
  .jk-cards,.jk-princ,.jk-tips,.jk-sit{grid-template-columns:1fr 1fr}
  .jk-gal{grid-template-columns:1fr 1fr}
  .jk-strip-txt{font-size:1.35rem}
  .jk-split-txt{padding:44px 0}
}
@media(max-width:600px){
  body{font-size:16px}
  .jk-nav{display:none;position:absolute;top:68px;left:0;right:0;flex-direction:column;background:var(--panel);padding:16px 26px;gap:10px;border-bottom:2px solid var(--ink)}
  .jk-nav.is-open{display:flex}
  .jk-burger{display:flex}
  .jk-cards,.jk-princ,.jk-tips,.jk-sit,.jk-gal,.jk-f2,.jk-form-row{grid-template-columns:1fr}
  .jk-wizard{padding:26px 22px}
}