/* UNMCG — Pogodi broj (matematička igra)
   Identitet: tamnoplava / zlatna / bijela / svijetloplava; zelena=uspjeh, crvena=greška.
   Mobile-first, bez eksternih biblioteka. */

.pb-app{
  --pb-navy:#0f2a4a;
  --pb-navy-2:#16375f;
  --pb-gold:#d4a72c;
  --pb-blue:#e8f0fb;
  --pb-blue-line:#c7d8f0;
  --pb-ink:#12233b;
  --pb-muted:#5b6b80;
  --pb-ok:#1f9d57;
  --pb-err:#d43c3c;
  --pb-white:#ffffff;
  --pb-radius:16px;
  --pb-shadow:0 10px 30px rgba(15,42,74,.12);
  max-width:640px;
  margin:0 auto;
  padding:0 14px;
  color:var(--pb-ink);
  font-family:inherit;
  -webkit-text-size-adjust:100%;
}
.pb-app *{box-sizing:border-box}
.pb-shell{position:relative}

/* Ekrani */
.pb-screen{display:none}
.pb-screen.is-active{display:block}
.pb-game:not([hidden]),
.pb-result:not([hidden]){display:block}

/* ── Početni ekran ── */
.pb-home{position:relative;text-align:center;padding:30px 18px 26px;border-radius:var(--pb-radius);
  background:linear-gradient(160deg,var(--pb-navy),var(--pb-navy-2));color:var(--pb-white);
  overflow:hidden;box-shadow:var(--pb-shadow)}
.pb-grid-bg{position:absolute;inset:0;opacity:.14;pointer-events:none;
  background-image:linear-gradient(var(--pb-white) 1px,transparent 1px),
                   linear-gradient(90deg,var(--pb-white) 1px,transparent 1px);
  background-size:28px 28px;background-position:center;
  -webkit-mask-image:radial-gradient(circle at 50% 40%,#000 40%,transparent 78%);
          mask-image:radial-gradient(circle at 50% 40%,#000 40%,transparent 78%)}
.pb-title{position:relative;margin:0 0 6px;font-size:2rem;font-weight:800;letter-spacing:.5px}
.pb-title::after{content:"";display:block;width:54px;height:3px;background:var(--pb-gold);margin:10px auto 0;border-radius:3px}
.pb-sub{position:relative;margin:0 auto 20px;max-width:34ch;color:#d9e4f4;font-size:1rem}

.pb-levels{position:relative;display:grid;gap:10px;margin:0 auto 16px;max-width:360px}
.pb-lvl{display:flex;flex-direction:column;align-items:flex-start;gap:2px;
  background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.18);
  color:var(--pb-white);border-radius:12px;padding:13px 16px;cursor:pointer;
  transition:transform .12s ease,background .12s ease,border-color .12s ease}
.pb-lvl:hover{background:rgba(255,255,255,.14);border-color:var(--pb-gold)}
.pb-lvl:active{transform:scale(.99)}
.pb-lvl-name{font-weight:700;font-size:1.05rem}
.pb-lvl-meta{font-size:.8rem;color:#c6d5ec}

.pb-home-actions{position:relative;display:flex;flex-wrap:wrap;gap:8px;justify-content:center;margin-top:6px}
.pb-stats-strip{position:relative;display:flex;flex-wrap:wrap;gap:14px;justify-content:center;
  margin-top:18px;font-size:.82rem;color:#cfdcef}
.pb-stats-strip b{color:var(--pb-gold)}

/* ── Dugmad ── */
.pb-btn{font:inherit;font-weight:600;border:0;border-radius:12px;padding:12px 18px;min-height:44px;
  cursor:pointer;transition:transform .12s ease,filter .12s ease,background .12s ease}
.pb-btn:active{transform:scale(.98)}
.pb-btn-primary{background:var(--pb-gold);color:#3a2c05}
.pb-btn-primary:hover{filter:brightness(1.05)}
.pb-btn-ghost{background:rgba(255,255,255,.1);color:var(--pb-white);border:1px solid rgba(255,255,255,.22)}
.pb-btn-ghost:hover{background:rgba(255,255,255,.18)}

/* ── Ekran igre ── */
.pb-game{background:var(--pb-white);border:1px solid var(--pb-blue-line);border-radius:var(--pb-radius);
  padding:16px;box-shadow:var(--pb-shadow);margin-top:2px}
.pb-gbar{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.pb-back{width:38px;height:38px;border-radius:10px;border:1px solid var(--pb-blue-line);
  background:var(--pb-blue);color:var(--pb-navy);font-size:1.4rem;line-height:1;cursor:pointer}
.pb-badge{background:var(--pb-navy);color:#fff;font-weight:700;font-size:.82rem;
  padding:5px 11px;border-radius:999px}
.pb-gbar-right{margin-left:auto;display:flex;align-items:center;gap:10px}
.pb-timer{font-variant-numeric:tabular-nums;font-weight:800;font-size:1.15rem;color:var(--pb-navy);
  min-width:46px;text-align:right}
.pb-timer.is-low{color:var(--pb-err)}
.pb-timer.is-low::before{content:"⏱ "}
.pb-score{font-variant-numeric:tabular-nums;font-weight:700;color:var(--pb-gold);
  background:#fbf3dd;border-radius:999px;padding:5px 11px;font-size:.9rem}
.pb-score::before{content:"★ "}

.pb-clues{display:grid;gap:8px;margin-bottom:14px}
.pb-clue{display:flex;gap:10px;align-items:flex-start;background:var(--pb-blue);
  border:1px solid var(--pb-blue-line);border-left:4px solid var(--pb-navy);
  border-radius:10px;padding:11px 13px;font-size:.98rem;line-height:1.35}
.pb-clue .pb-dot{flex:0 0 auto;width:20px;height:20px;border-radius:50%;background:var(--pb-navy);
  color:#fff;font-size:.72rem;font-weight:700;display:flex;align-items:center;justify-content:center;margin-top:1px}

.pb-attempts{display:flex;gap:7px;margin-bottom:14px;align-items:center}
.pb-att{width:14px;height:14px;border-radius:50%;background:var(--pb-blue);
  border:1.5px solid var(--pb-navy);transition:background .2s}
.pb-att.is-used{background:var(--pb-err);border-color:var(--pb-err)}
.pb-att-label{margin-left:6px;font-size:.8rem;color:var(--pb-muted)}

.pb-form{display:flex;gap:8px}
.pb-input{flex:1;min-width:0;font:inherit;font-size:1.15rem;padding:12px 14px;
  border:2px solid var(--pb-blue-line);border-radius:12px;background:#fff;color:var(--pb-ink)}
.pb-input:focus{outline:none;border-color:var(--pb-navy);box-shadow:0 0 0 3px rgba(15,42,74,.15)}
.pb-form .pb-btn-primary{flex:0 0 auto}

.pb-feedback{min-height:1.4em;margin:12px 2px 0;font-weight:600;font-size:.95rem}
.pb-feedback.is-up{color:var(--pb-navy)}
.pb-feedback.is-down{color:var(--pb-navy)}
.pb-feedback.is-err{color:var(--pb-err)}
.pb-feedback.is-ok{color:var(--pb-ok)}

/* ── Rezultat ── */
.pb-result{background:var(--pb-white);border:1px solid var(--pb-blue-line);border-radius:var(--pb-radius);
  padding:26px 20px;box-shadow:var(--pb-shadow);text-align:center;margin-top:2px}
.pb-result-icon{width:64px;height:64px;margin:0 auto 12px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;font-size:2rem;color:#fff;background:var(--pb-ok)}
.pb-result.is-lose .pb-result-icon{background:var(--pb-navy)}
.pb-result-title{margin:0 0 14px;font-size:1.35rem;color:var(--pb-ink)}
.pb-result-stats{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin-bottom:16px}
.pb-rs{background:var(--pb-blue);border:1px solid var(--pb-blue-line);border-radius:10px;
  padding:8px 12px;min-width:82px}
.pb-rs b{display:block;font-size:1.15rem;color:var(--pb-navy);font-variant-numeric:tabular-nums}
.pb-rs span{font-size:.74rem;color:var(--pb-muted)}
.pb-explain{text-align:left;background:#fbfcfe;border:1px dashed var(--pb-blue-line);
  border-radius:12px;padding:14px;margin:0 auto 18px;max-width:440px}
.pb-explain h4{margin:0 0 8px;font-size:.95rem;color:var(--pb-navy)}
.pb-explain ul{margin:0;padding-left:18px}
.pb-explain li{margin:4px 0;font-size:.9rem;line-height:1.35}
.pb-result-actions{display:flex;gap:10px;justify-content:center;flex-wrap:wrap}
.pb-result-actions .pb-btn-ghost{background:var(--pb-blue);color:var(--pb-navy);border-color:var(--pb-blue-line)}

/* ── Modal ── */
.pb-modal{position:fixed;inset:0;z-index:99999;display:flex;align-items:center;justify-content:center;
  padding:16px;background:rgba(15,42,74,.5)}
.pb-modal[hidden]{display:none}
.pb-modal-box{position:relative;background:#fff;border-radius:var(--pb-radius);max-width:460px;width:100%;
  max-height:86vh;overflow:auto;padding:22px 20px;box-shadow:0 20px 60px rgba(0,0,0,.3)}
.pb-modal-x{position:absolute;top:10px;right:12px;border:0;background:transparent;font-size:1.6rem;
  line-height:1;cursor:pointer;color:var(--pb-muted);width:36px;height:36px}
.pb-modal-title{margin:0 0 12px;color:var(--pb-navy);font-size:1.2rem}
.pb-modal-body{font-size:.94rem;line-height:1.5}
.pb-modal-body h4{margin:16px 0 6px;color:var(--pb-navy)}
.pb-modal-body ul{padding-left:18px;margin:6px 0}

/* Rang-lista */
.pb-lb-tabs{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:12px}
.pb-lb-tab{font:inherit;font-size:.82rem;border:1px solid var(--pb-blue-line);background:var(--pb-blue);
  color:var(--pb-navy);border-radius:999px;padding:6px 12px;cursor:pointer}
.pb-lb-tab.is-active{background:var(--pb-navy);color:#fff;border-color:var(--pb-navy)}
.pb-lb-list{list-style:none;margin:0;padding:0}
.pb-lb-row{display:flex;align-items:center;gap:10px;padding:8px 4px;border-bottom:1px solid #eef2f8}
.pb-lb-rank{width:22px;text-align:center;font-weight:700;color:var(--pb-muted)}
.pb-lb-av{width:30px;height:30px;border-radius:50%;object-fit:cover;background:var(--pb-navy);
  color:#fff;display:flex;align-items:center;justify-content:center;font-size:.8rem;font-weight:700;flex:0 0 auto}
.pb-lb-name{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.pb-lb-score{font-weight:700;color:var(--pb-gold);font-variant-numeric:tabular-nums}

/* Dostignuća (diskretno) */
.pb-ach-grid{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-top:8px}
.pb-ach{display:flex;gap:8px;align-items:flex-start;border:1px solid var(--pb-blue-line);border-radius:10px;
  padding:9px;background:#fbfcfe}
.pb-ach.is-locked{opacity:.45;filter:grayscale(.4)}
.pb-ach-ic{font-size:1rem}
.pb-ach b{display:block;font-size:.82rem;color:var(--pb-navy)}
.pb-ach span{font-size:.72rem;color:var(--pb-muted)}
.pb-rank-line{margin:10px 0 4px;font-size:.9rem}
.pb-rank-line b{color:var(--pb-gold)}
.pb-xpbar{height:8px;border-radius:6px;background:var(--pb-blue);overflow:hidden;margin:4px 0 2px}
.pb-xpbar>i{display:block;height:100%;background:var(--pb-gold)}

/* ── Mikroanimacije (tačno/pogrešno/dostignuće) ── */
.pb-game{transition:border-color .3s ease,box-shadow .3s ease}
.pb-game.is-correct{border-color:var(--pb-ok);box-shadow:0 0 0 3px rgba(31,157,87,.18)}
.pb-game.is-wrong{border-color:var(--pb-err);box-shadow:0 0 0 3px rgba(212,60,60,.14)}
.pb-game.is-correct .pb-input{border-color:var(--pb-ok)}
.pb-game.is-wrong .pb-input{border-color:var(--pb-err)}
@keyframes pbShake{0%,100%{transform:translateX(0)}20%{transform:translateX(-6px)}40%{transform:translateX(6px)}60%{transform:translateX(-4px)}80%{transform:translateX(4px)}}
.pb-shake{animation:pbShake .34s ease}
@keyframes pbPulse{0%{transform:scale(1)}50%{transform:scale(1.05)}100%{transform:scale(1)}}
.pb-pulse{animation:pbPulse .4s ease}
@keyframes pbMedal{0%{opacity:0;transform:scale(.6)}60%{opacity:1;transform:scale(1.15)}100%{opacity:1;transform:scale(1)}}
.pb-medal{display:inline-block;animation:pbMedal .5s ease}
.pb-sound-toggle[aria-pressed="false"]{opacity:.65}

.pb-sr{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);border:0}

/* Fokus vidljiv za tastaturu */
.pb-app :focus-visible{outline:3px solid var(--pb-gold);outline-offset:2px;border-radius:6px}

/* ── Mobilni ── */
@media (max-width:430px){
  .pb-title{font-size:1.7rem}
  .pb-ach-grid{grid-template-columns:1fr}
  .pb-input{font-size:1.05rem}
}
@media (max-width:360px){
  .pb-app{padding:0 10px}
  .pb-home{padding:24px 12px}
}

/* Reduced motion */
@media (prefers-reduced-motion:reduce){
  .pb-app *{transition:none !important;animation:none !important}
}