/* ============================================================
   OPTIK Kočárek — shared theme + chrome
   Used by every page. Page-specific sections live inline.
   ============================================================ */

/* ---------- THEME TOKENS ---------- */
:root, [data-theme="heritage"]{
  --font-head:'Lora',serif; --font-body:'Manrope',sans-serif; --font-accent:'Lora',serif;
  --head-weight:400; --head-tracking:.01em; --body-weight:300;
  --bg:#F4EEE3; --bg-2:#E9DFCC; --card:#F4EEE3;
  --ink:#221F19; --ink-soft:#5A5247;
  --accent:#A8753D; --accent-deep:#8E5F2E; --accent-soft:rgba(168,117,61,.12);
  --dark:#2C382E; --on-dark:#F4EEE3; --on-dark-soft:rgba(244,238,227,.85); --gold:#E2C08A;
  --line:rgba(34,31,25,.16);
  --radius:0px; --btn-radius:0px; --grain:.35;
  --label-bg:transparent; --label-pad:0; --label-spacing:.34em; --label-weight:400;
  --hero-em:#E2C08A;
}
[data-theme="modern"]{
  --font-head:'Manrope',sans-serif; --font-body:'Manrope',sans-serif; --font-accent:'Newsreader',serif;
  --head-weight:700; --head-tracking:-.02em; --body-weight:400;
  --bg:#FBFAF8; --bg-2:#F1EFEA; --card:#FFFFFF;
  --ink:#1A1C1B; --ink-soft:#6B6F6C;
  --accent:#16715A; --accent-deep:#12604c; --accent-soft:#E6F0EC;
  --dark:#16715A; --on-dark:#FFFFFF; --on-dark-soft:rgba(255,255,255,.85); --gold:#9FD3C3;
  --line:#E7E4DE;
  --radius:18px; --btn-radius:100px; --grain:0;
  --label-bg:var(--accent-soft); --label-pad:7px 14px; --label-spacing:.14em; --label-weight:600;
  --hero-em:#E2C08A;
}

/* ---------- BASE ---------- */
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;font-size:17px}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%}
body{background:var(--bg);color:var(--ink);font-family:var(--font-body);font-weight:var(--body-weight);line-height:1.7;-webkit-font-smoothing:antialiased;overflow-x:hidden;transition:background .5s ease,color .5s ease}
body::before{content:"";position:fixed;inset:0;z-index:9999;pointer-events:none;opacity:var(--grain);mix-blend-mode:multiply;transition:opacity .5s ease;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.3'/%3E%3C/svg%3E")}
h1,h2,h3{font-family:var(--font-head);font-weight:var(--head-weight);letter-spacing:var(--head-tracking);line-height:1.1}
img{display:block;max-width:100%}
a{color:inherit}
.container{max-width:1200px;margin:0 auto;padding:0 40px}
.label{display:inline-block;font-size:.72rem;letter-spacing:var(--label-spacing);text-transform:uppercase;color:var(--accent);font-weight:var(--label-weight);background:var(--label-bg);padding:var(--label-pad);border-radius:var(--btn-radius)}

/* ---------- NAV ---------- */
nav{position:sticky;top:0;z-index:100;background:color-mix(in srgb,var(--bg) 90%,transparent);backdrop-filter:blur(8px);border-bottom:1px solid var(--line);transition:background .5s ease,border-color .5s ease}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:16px 40px}
.brand{font-family:var(--font-head);font-weight:var(--head-weight);font-size:1.34rem;letter-spacing:.02em;display:flex;align-items:center;gap:10px;text-decoration:none;white-space:nowrap}
[data-theme="modern"] .brand{font-weight:800}
.nav-mid{display:flex;align-items:center;gap:18px}
.nav-links{display:flex;gap:18px;list-style:none}
.nav-links a{text-decoration:none;font-size:.75rem;letter-spacing:.09em;text-transform:uppercase;position:relative;padding-bottom:3px;color:var(--ink-soft);transition:color .25s;white-space:nowrap}
.nav-links a:hover{color:var(--ink)}
.nav-links a::after{content:"";position:absolute;left:0;bottom:0;height:1px;width:0;background:var(--accent);transition:width .35s}
.nav-links a:hover::after{width:100%}
.nav-right{display:flex;align-items:center;gap:13px}

/* theme slider */
.theme-toggle{display:flex;align-items:center;gap:9px;background:none;border:none;cursor:pointer;padding:4px;font-family:var(--font-body)}
.theme-toggle .tlab{font-size:.56rem;letter-spacing:.1em;text-transform:uppercase;color:var(--ink-soft);transition:color .3s}
.theme-toggle .tlab.on{color:var(--accent);font-weight:600}
.switch{width:40px;height:22px;border-radius:100px;background:var(--bg-2);border:1px solid var(--line);position:relative;transition:background .3s,border-color .3s;flex:0 0 auto}
.switch .knob{position:absolute;top:2px;left:2px;width:16px;height:16px;border-radius:50%;background:var(--accent);transition:transform .3s ease,background .3s}
[data-theme="modern"] .switch .knob{transform:translateX(18px)}

/* lang switch */
.lang-switch{display:flex;align-items:center}
.lang-switch button{background:none;border:none;cursor:pointer;font-family:var(--font-body);font-size:.7rem;letter-spacing:.1em;color:var(--ink-soft);padding:4px 7px;text-transform:uppercase;transition:color .25s}
.lang-switch button:not(:last-child){border-right:1px solid var(--line)}
.lang-switch button:hover{color:var(--ink)}
.lang-switch button.active{color:var(--accent);font-weight:600}

.nav-book{background:var(--dark);color:var(--on-dark);text-decoration:none;padding:11px 22px;font-size:.74rem;letter-spacing:.16em;text-transform:uppercase;border-radius:var(--btn-radius);transition:.3s;font-weight:var(--label-weight)}
.nav-book:hover{filter:brightness(.9)}
.burger{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:6px}
.burger span{width:24px;height:2px;background:var(--ink);border-radius:2px;transition:transform .3s ease,opacity .2s ease}
.burger.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.burger.open span:nth-child(2){opacity:0}
.burger.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.mobile-menu{display:none}
body.menu-open{overflow:hidden}

/* ---------- SHARED BUTTONS ---------- */
.btn-primary{background:var(--accent);color:#fff;text-decoration:none;padding:16px 38px;font-size:.8rem;letter-spacing:.16em;text-transform:uppercase;border-radius:var(--btn-radius);transition:background .3s;font-weight:var(--label-weight)}
.btn-primary:hover{background:var(--accent-deep)}
.btn-ghost{border:1px solid rgba(255,255,255,.6);color:#fff;text-decoration:none;padding:15px 32px;font-size:.8rem;letter-spacing:.16em;text-transform:uppercase;border-radius:var(--btn-radius);transition:background .3s}
.btn-ghost:hover{background:rgba(255,255,255,.12)}

/* ---------- FOOTER ---------- */
footer{border-top:1px solid var(--line);padding:40px;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:16px}
.fine{font-size:.74rem;letter-spacing:.12em;text-transform:uppercase;color:var(--ink-soft)}

/* ---------- REVEAL (only hide when JS is active, so content never stays blank) ---------- */
html.js .reveal{opacity:0;transform:translateY(26px);transition:opacity 1s,transform 1s cubic-bezier(.2,.7,.3,1)}
html.js .reveal.in{opacity:1;transform:none}   /* must match the html.js scope above or it loses on specificity and content stays hidden */

/* ---------- RESPONSIVE (nav/chrome) ---------- */
@media(max-width:1160px){
  .container{padding:0 24px}
  .nav-inner{padding:14px 24px}
  .brand{font-size:1.08rem}              /* keep the longer name from crowding the burger on phones */
  .nav-mid,.nav-right{display:none}   /* hide desktop links + theme/lang tools on mobile; they live in the burger menu (.mobile-tools). Leaving .nav-right visible forced the row ~660px wide → horizontal overflow */
  .burger{display:flex}
  /* full-screen overlay BELOW the header. Must live outside <nav> (nav's backdrop-filter
     creates a containing block that otherwise collapses this fixed panel). z-index under the
     nav so the header + hamburger/X stay tappable. */
  .mobile-menu{display:block;position:fixed;left:0;right:0;top:56px;bottom:0;z-index:90;
    background:var(--bg);padding:24px 24px 40px;overflow-y:auto;-webkit-overflow-scrolling:touch;
    opacity:0;visibility:hidden;pointer-events:none;transform:translateY(-8px);
    transition:opacity .3s ease,transform .3s ease,visibility .3s ease}
  .mobile-menu.open{opacity:1;visibility:visible;pointer-events:auto;transform:none}
  .mobile-menu ul{list-style:none;display:flex;flex-direction:column;gap:4px}
  .mobile-menu a{display:block;padding:16px 0;text-decoration:none;font-size:1.1rem;letter-spacing:.08em;text-transform:uppercase;border-bottom:1px solid var(--line)}
  .mobile-menu .btn-primary{display:block;text-align:center;margin-top:24px}
  .mobile-tools{display:flex;justify-content:space-between;align-items:center;margin-top:28px;gap:20px;flex-wrap:wrap}
}