/* =======================================================================
   DORIAN'S LAB — navigacija (megameni na ekranu, fioka na telefonu)
   Crta je assets/nav.js iz SUBJECTS + MODULES (assets/modules.js).
   Boje su tokeni iz lab.css; stare dvije igre imaju iste tokene kod sebe.
   ======================================================================= */
:root{ --labnav-h:64px }

/* naslov ispod ljepljive trake kad se skoči na #p-math itd. */
[id]{ scroll-margin-top:calc(var(--labnav-h) + 16px) }

.labnav{position:sticky;top:0;z-index:60;font-family:"Nunito",ui-sans-serif,system-ui,sans-serif}
/* dvostruki dodir ne smije zumirati stranicu — dijete lupka po tastaturi.
   touch-action:manipulation gasi samo dupli-tap zum, prstima se i dalje može zumirati. */
html,body{touch-action:manipulation}
.labnav *{box-sizing:border-box}
.labnav button{font-family:inherit;cursor:pointer}

.labnav-bar{position:relative;background:#1B1749;border-bottom:1px solid rgba(255,255,255,.12);
  padding-top:env(safe-area-inset-top);         /* ispod sata i ikona kad je Lab instaliran */
  transform:translateZ(0);                      /* vlastiti sloj — traka se ne prekrcava sa sadržajem */
  transition:box-shadow .25s ease}
.labnav.scrolled .labnav-bar{box-shadow:0 16px 36px -22px rgba(0,0,0,1)}
.labnav-in{max-width:1080px;margin:0 auto;padding:9px 16px;display:flex;align-items:center;gap:6px;min-height:var(--labnav-h)}

/* ---------- logo ---------- */
.labnav-logo{display:inline-flex;align-items:center;gap:10px;text-decoration:none;color:var(--cream);
  padding:5px 12px 5px 6px;border-radius:15px;flex:none;transition:background .18s ease}
.labnav-logo:hover{background:rgba(255,255,255,.09)}
.labnav-flask{width:36px;height:36px;border-radius:13px;display:grid;place-items:center;font-size:19px;flex:none;
  background:linear-gradient(135deg,#B48CF0,#F4718C);box-shadow:0 8px 18px -10px rgba(180,140,240,.9)}
.labnav-word{font-family:"Baloo 2","Nunito",sans-serif;font-weight:800;font-size:17.5px;line-height:1.05;white-space:nowrap}
.labnav-word small{display:block;font-size:10.5px;font-weight:700;letter-spacing:.6px;opacity:.55;
  font-family:"Nunito",sans-serif;text-transform:uppercase}

/* ---------- stavke ---------- */
.labnav-items{display:flex;align-items:center;gap:2px;margin-left:8px}
.labnav-item{position:relative;height:44px;padding:0 13px;border-radius:14px;border:1px solid transparent;
  background:transparent;color:var(--cream);font-weight:800;font-size:14.5px;display:inline-flex;align-items:center;gap:8px;
  transition:background .18s ease,border-color .18s ease}
.labnav-item:hover,.labnav-item[aria-expanded="true"]{background:rgba(255,255,255,.1);border-color:rgba(255,255,255,.17)}
.labnav-item:focus-visible{outline:3px solid var(--butter);outline-offset:2px}
.labnav-item .d{width:9px;height:9px;border-radius:50%;flex:none;box-shadow:0 0 0 3px rgba(255,255,255,.09)}
.labnav-item .cv{font-size:9px;opacity:.55;transition:transform .22s ease}
.labnav-item[aria-expanded="true"] .cv{transform:rotate(180deg);opacity:.9}
.labnav-item.here::after{content:"";position:absolute;left:13px;right:13px;bottom:4px;height:3px;border-radius:3px;background:currentColor;opacity:.85}

.labnav-right{display:flex;align-items:center;gap:8px;margin-left:auto}
.labnav-lvl{display:inline-flex;align-items:center;gap:9px;height:40px;padding:0 14px;border-radius:999px;
  background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.16);font-weight:800;font-size:13.5px;white-space:nowrap}
.labnav-lvl b{font-family:"Baloo 2",sans-serif;font-size:16px;color:var(--butter)}
.labnav-xp{width:66px;height:8px;border-radius:999px;background:rgba(0,0,0,.4);overflow:hidden}
.labnav-xp i{display:block;height:100%;border-radius:999px;background:linear-gradient(90deg,var(--mint),var(--butter))}
.labnav-icon{width:44px;height:44px;border-radius:14px;display:grid;place-items:center;font-size:17px;text-decoration:none;
  color:var(--cream);background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.16);flex:none}
.labnav-icon:hover{background:rgba(255,255,255,.17)}

/* ---------- megameni ---------- */
.labnav-mega{position:absolute;left:0;right:0;top:100%;padding:0 16px 16px;
  opacity:0;transform:translateY(-10px);pointer-events:none;visibility:hidden;   /* zatvoren meni ne hvata ni Tab */
  transition:opacity .2s ease,transform .2s ease,visibility .2s}
.labnav-mega.open{opacity:1;transform:none;pointer-events:auto;visibility:visible}
.labnav-mega-in{max-width:1080px;margin:0 auto;border-radius:24px;overflow:hidden;
  background:linear-gradient(180deg,#221C57,#1B1747);border:1px solid rgba(255,255,255,.16);
  box-shadow:0 40px 70px -34px rgba(0,0,0,1);display:grid;grid-template-columns:290px 1fr;
  max-height:calc(100vh - var(--labnav-h) - 28px)}
.labnav-side{padding:22px;background:linear-gradient(160deg,rgba(255,255,255,.09),rgba(255,255,255,.02));
  border-right:1px solid rgba(255,255,255,.12);display:flex;flex-direction:column;gap:10px}
.labnav-side .ic{width:50px;height:50px;border-radius:16px;display:grid;place-items:center;color:#221A47;
  font-family:"Baloo 2",sans-serif;font-weight:800;font-size:24px}
.labnav-side h3{font-family:"Baloo 2",sans-serif;font-size:23px;margin:4px 0 0;line-height:1.15}
.labnav-side p{margin:0;font-size:13.5px;opacity:.72;line-height:1.45}
.labnav-pills{display:flex;gap:6px;flex-wrap:wrap;margin-top:2px}
.labnav-pill{display:inline-flex;align-items:center;gap:6px;border-radius:999px;padding:5px 11px;font-size:12px;font-weight:800;
  background:rgba(255,255,255,.09);border:1px solid rgba(255,255,255,.15)}
.labnav-go{margin-top:auto;display:inline-flex;align-items:center;justify-content:space-between;gap:10px;
  text-decoration:none;color:#2A1E4A;font-weight:800;font-size:14px;border-radius:14px;padding:11px 15px;min-height:44px;
  background:linear-gradient(90deg,var(--butter),var(--peach))}
.labnav-go:hover{filter:brightness(1.06)}

.labnav-grid{padding:16px;display:grid;gap:8px;grid-template-columns:repeat(2,minmax(0,1fr));overflow-y:auto}
.labnav-link{display:flex;align-items:center;gap:12px;text-decoration:none;color:var(--cream);border-radius:16px;
  padding:11px 12px;border:1px solid transparent;min-height:56px;transition:background .16s ease,border-color .16s ease,transform .16s ease}
.labnav-link:hover{background:rgba(255,255,255,.09);border-color:rgba(255,255,255,.18);transform:translateY(-2px)}
.labnav-link:focus-visible{outline:3px solid var(--butter);outline-offset:2px}
.labnav-link.here{background:rgba(255,209,102,.14);border-color:rgba(255,209,102,.5)}
.labnav-link.locked{opacity:.42;pointer-events:none}
.labnav-link .ic{width:40px;height:40px;border-radius:13px;display:grid;place-items:center;flex:none;color:#221A47;
  font-family:"Baloo 2",sans-serif;font-weight:800;font-size:18px}
.labnav-link .tx{flex:1;min-width:0}
.labnav-link .tx b{display:block;font-family:"Baloo 2",sans-serif;font-weight:700;font-size:16px;line-height:1.2}
.labnav-link .tx small{display:block;font-size:12px;opacity:.6;margin-top:2px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.labnav-new{font-size:10px;font-weight:800;letter-spacing:.5px;border-radius:7px;padding:3px 7px;color:#10331F;
  background:linear-gradient(90deg,var(--mint),var(--sky))}
.labnav-link .ar{opacity:.35;font-family:"Baloo 2",sans-serif;font-size:18px}
.labnav-xpmark{font-family:"Baloo 2",sans-serif;font-size:13px;font-weight:700;color:var(--butter);opacity:.85;white-space:nowrap}

/* predmet koji još nema vježbi */
.labnav-empty{grid-column:1/-1;align-self:center;text-align:center;padding:26px 20px;border-radius:20px;
  border:2px dashed rgba(255,255,255,.2);background:rgba(255,255,255,.03)}
.labnav-empty .e{font-size:30px;display:block;margin-bottom:6px}
.labnav-empty b{display:block;font-family:"Baloo 2",sans-serif;font-size:18px}
.labnav-empty p{margin:4px 0 0;font-size:13.5px;opacity:.65}

/* red časova u megameniju „Danas" */
.labnav-day{display:flex;align-items:center;gap:11px;padding:9px 11px;border-radius:14px;text-decoration:none;color:var(--cream);
  background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.1);min-height:48px}
.labnav-day:hover{background:rgba(255,255,255,.12)}
.labnav-day.off{opacity:.5}
.labnav-day .n{font-family:"Baloo 2",sans-serif;font-size:15px;opacity:.5;width:16px;flex:none}
.labnav-day .d{width:10px;height:10px;border-radius:50%;flex:none}
.labnav-day b{font-weight:800;font-size:14.5px}

/* ---------- telefon ---------- */
.labnav-burger{display:none;width:46px;height:46px;border-radius:15px;margin-left:auto;flex:none;
  background:rgba(255,255,255,.09);border:1px solid rgba(255,255,255,.17);color:var(--cream);
  align-items:center;justify-content:center;gap:5px;flex-direction:column}
.labnav-burger i{display:block;width:19px;height:2.5px;border-radius:3px;background:var(--cream);transition:transform .25s ease,opacity .2s ease}

/* meni na telefonu ide preko cijelog ekrana */
.labnav-drawer{position:fixed;inset:0;z-index:80;display:none}
.labnav-drawer.open{display:block}
.labnav-sheet{position:absolute;inset:0;overflow-y:auto;overscroll-behavior:contain;
  background:
    radial-gradient(900px 520px at 18% -12%, #3A2E86 0%, transparent 62%),
    radial-gradient(760px 440px at 96% 6%, #4B2A6B 0%, transparent 58%),
    var(--ink);
  padding:0 0 calc(32px + env(safe-area-inset-bottom));animation:labnav-open .26s cubic-bezier(.2,.8,.2,1)}
.labnav-sheet .inner{max-width:592px;margin:0 auto;padding:0 16px}
@keyframes labnav-open{from{opacity:0;transform:scale(.98)}}

/* zaglavlje je ljepljivo i ide od ruba do ruba — inače se ispod njega,
   po ivicama, vidi sadržaj koji se skroluje */
.labnav-sheet .head{position:sticky;top:0;z-index:2;padding:calc(12px + env(safe-area-inset-top)) 0 14px;margin-bottom:6px;
  background:linear-gradient(180deg,var(--ink) 62%,rgba(23,20,59,.86) 86%,rgba(23,20,59,0))}
.labnav-sheet .head-in{max-width:592px;margin:0 auto;padding:0 16px;display:flex;align-items:center;gap:10px}
.labnav-close{width:46px;height:46px;border-radius:15px;margin-left:auto;flex:none;font-size:19px;
  background:rgba(255,255,255,.09);border:1px solid rgba(255,255,255,.17);color:var(--cream)}
.labnav-mstat{display:flex;align-items:center;gap:10px;border-radius:18px;padding:12px 14px;margin-bottom:14px;
  background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.14)}
.labnav-mstat .lv{font-family:"Baloo 2",sans-serif;font-size:15px;white-space:nowrap}
.labnav-mstat .lv b{color:var(--butter);font-size:19px}
.labnav-mstat .bar{flex:1;height:10px;border-radius:999px;background:rgba(0,0,0,.4);overflow:hidden}
.labnav-mstat .bar i{display:block;height:100%;background:linear-gradient(90deg,var(--mint),var(--butter))}

.labnav-lbl{font-size:11.5px;font-weight:800;letter-spacing:.8px;text-transform:uppercase;opacity:.5;margin:16px 4px 8px}
.labnav-chips{display:flex;flex-wrap:wrap;gap:7px}
.labnav-chip{display:inline-flex;align-items:center;gap:7px;border-radius:999px;padding:8px 13px;min-height:38px;
  text-decoration:none;color:var(--cream);font-weight:800;font-size:13.5px;
  background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.14)}
.labnav-chip i{width:9px;height:9px;border-radius:50%;flex:none}
.labnav-chip.off{opacity:.5}

.labnav-acc{width:100%;display:flex;align-items:center;gap:12px;min-height:60px;padding:10px 12px;margin-bottom:8px;
  border-radius:18px;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.13);color:var(--cream);text-align:left}
.labnav-acc[aria-expanded="true"]{background:rgba(255,255,255,.12);border-color:rgba(255,255,255,.24);margin-bottom:0}
.labnav-acc .ic{width:42px;height:42px;border-radius:14px;display:grid;place-items:center;flex:none;color:#221A47;
  font-family:"Baloo 2",sans-serif;font-weight:800;font-size:19px}
.labnav-acc .tx{flex:1;min-width:0}
.labnav-acc .tx b{display:block;font-family:"Baloo 2",sans-serif;font-size:17px;line-height:1.2}
.labnav-acc .tx small{display:block;font-size:12px;opacity:.6}
.labnav-acc .cv{font-size:11px;opacity:.6;transition:transform .22s ease}
.labnav-acc[aria-expanded="true"] .cv{transform:rotate(180deg)}
.labnav-accbody{padding:8px 6px 12px;margin-bottom:8px;border-radius:0 0 18px 18px;
  background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.13);border-top:none}
.labnav-accbody .labnav-link{min-height:58px}
.labnav-foot{margin-top:18px;display:grid;gap:8px}
.labnav-foot a,.labnav-foot button{display:flex;align-items:center;gap:10px;min-height:50px;padding:12px 14px;border-radius:16px;
  text-decoration:none;color:var(--cream);font-weight:800;font-size:14.5px;
  background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.13);width:100%;text-align:left}

/* ---------- podnožje (isto kao na razrednom sajtu) ---------- */
.labfoot{margin-top:56px;padding:26px 20px calc(34px + env(safe-area-inset-bottom));
  border-top:1px solid rgba(255,255,255,.12);text-align:center;
  font-family:"Nunito",ui-sans-serif,system-ui,sans-serif;color:var(--cream)}
.labfoot p{margin:0;font-size:13.5px;line-height:1.7;opacity:.6}
.labfoot p.credit{opacity:.75;margin-top:2px}
.labfoot b{font-weight:800;opacity:1}
.labfoot a{color:var(--plum);text-decoration:none;font-weight:800;transition:color .3s}
.labfoot a:hover{color:var(--butter)}

/* ---------- pitanje u aplikaciji (umjesto confirm() iz browsera) ---------- */
.labpitaj{position:fixed;inset:0;z-index:100;display:grid;place-items:center;padding:18px;
  font-family:"Nunito",ui-sans-serif,system-ui,sans-serif;color:var(--cream)}
.labpitaj .scrim{position:absolute;inset:0;background:rgba(9,7,26,.8);animation:labnav-fade .2s ease}
.labpitaj .box{position:relative;width:min(420px,100%);border-radius:24px;padding:24px 22px 20px;text-align:center;
  background:linear-gradient(180deg,#2C2468,#201A55);border:1px solid rgba(255,255,255,.2);
  box-shadow:0 40px 70px -30px rgba(0,0,0,1);animation:labpitaj-in .26s cubic-bezier(.2,.8,.2,1)}
@keyframes labpitaj-in{from{opacity:0;transform:translateY(14px) scale(.96)}}
.labpitaj .ic{font-size:40px;line-height:1;margin-bottom:8px}
.labpitaj h3{font-family:"Baloo 2",sans-serif;font-size:23px;margin:0 0 6px;line-height:1.2}
.labpitaj p{margin:0 0 18px;font-size:15px;opacity:.8;line-height:1.5}
.labpitaj .dugmad{display:flex;gap:10px;justify-content:center;flex-wrap:wrap}
.labpitaj button{min-height:50px;padding:0 22px;border-radius:16px;font-family:inherit;font-weight:800;font-size:15.5px;
  cursor:pointer;border:1px solid rgba(255,255,255,.2);background:rgba(255,255,255,.1);color:var(--cream);flex:1;min-width:120px}
.labpitaj button:hover{background:rgba(255,255,255,.18)}
.labpitaj button:focus-visible{outline:3px solid var(--butter);outline-offset:2px}
.labpitaj button.da{background:linear-gradient(180deg,#63E2B0,#2FB587);color:#10331F;border-color:transparent}
.labpitaj button.da.opasno{background:linear-gradient(180deg,#F4718C,#D4425F);color:#fff}

/* ---------- ponuda „dodaj na početni ekran" ---------- */
.labnav-install{position:fixed;z-index:70;left:50%;transform:translateX(-50%);
  bottom:calc(14px + env(safe-area-inset-bottom));width:min(520px,calc(100vw - 24px));
  display:flex;align-items:center;gap:12px;padding:12px 14px;border-radius:20px;
  font-family:"Nunito",ui-sans-serif,system-ui,sans-serif;color:var(--cream);
  background:linear-gradient(180deg,#2C2468,#201A55);border:1px solid rgba(255,255,255,.2);
  box-shadow:0 26px 50px -26px rgba(0,0,0,1);animation:labnav-up .3s cubic-bezier(.2,.8,.2,1)}
.labnav-install[hidden]{display:none}
@keyframes labnav-up{from{transform:translate(-50%,18px);opacity:0}}
.labnav-install .ic{width:42px;height:42px;border-radius:14px;display:grid;place-items:center;font-size:21px;flex:none;
  background:linear-gradient(135deg,#B48CF0,#F4718C)}
.labnav-install .tx{flex:1;min-width:0}
.labnav-install .tx b{display:block;font-family:"Baloo 2",sans-serif;font-size:16.5px;line-height:1.2}
.labnav-install .tx small{display:block;font-size:12.5px;opacity:.7;margin-top:2px}
.labnav-install .go{min-height:44px;padding:0 18px;border-radius:14px;border:none;font-weight:800;font-size:14.5px;
  color:#2A1E4A;background:linear-gradient(90deg,var(--butter),var(--peach));flex:none}
.labnav-install .x{width:38px;height:38px;border-radius:12px;flex:none;font-size:15px;color:var(--cream);
  background:rgba(255,255,255,.09);border:1px solid rgba(255,255,255,.16)}
.labnav-install.steps .tx small{opacity:.95;color:var(--butter)}

@media (max-width:1180px){ .labnav-lvl{display:none} }
@media (max-width:1023px){
  .labnav-items,.labnav-right{display:none}
  .labnav-burger{display:flex}
  .labnav-mega{display:none}
}
@media (prefers-reduced-motion:reduce){
  .labnav *,.labnav-drawer *{animation:none !important;transition:none !important}
}