/* ── Proměnné ─────────────────────────────────────────── */
:root {
  --orange: #FF6B35;
  --yellow: #FFD93D;
  --green:  #6BCB77;
  --blue:   #4D96FF;
  --purple: #C77DFF;
  --red:    #FF6B6B;
  --dark:   #1a1a2e;
}

/* ── Základ ───────────────────────────────────────────── */
body {
  font-family: 'Roboto', sans-serif;
  background: var(--dark);
}

/* ── Hvězdičky ───────────────────────────────────────── */
.stars { position: fixed; inset: 0; pointer-events: none; z-index: 0; }
.star  { position: absolute; width: 6px; height: 6px; border-radius: 50%; background: #fff; opacity: 0; animation: twinkle var(--d) var(--delay) infinite; }
@keyframes twinkle { 0%,100%{opacity:0;transform:scale(.5)} 50%{opacity:.7;transform:scale(1.2)} }

/* ── Karta aplikace ──────────────────────────────────── */
.app-main { position: relative; z-index: 1; }
.app-card {
  background: #fff;
  border-radius: 20px;
  padding: 40px 36px;
  box-shadow: 0 20px 60px rgba(0,0,0,.4);
  width: 100%;
  max-width: 480px;
  animation: slideUp .5s cubic-bezier(.34,1.56,.64,1);
}
@keyframes slideUp { from{opacity:0;transform:translateY(40px) scale(.95)} to{opacity:1;transform:translateY(0) scale(1)} }

@media (max-width: 540px) {
  .app-card { padding: 24px 18px; border-radius: 16px; }
}

/* ── Logo a nadpisy ──────────────────────────────────── */
.logo-icon  { font-size: 52px; display: block; animation: bounce 2s ease-in-out infinite; }
.app-title  { font-family: 'Potta One', cursive; font-size: 2.6rem; color: var(--dark); line-height: 1.1; }
.app-heading { font-family: 'Potta One', cursive; font-size: 1.8rem; color: var(--dark); margin-bottom: 0; }
.section-label { font-family: 'Potta One', cursive; font-size: 1.15rem; color: var(--dark); margin-bottom: 10px; }
@keyframes bounce { 0%,100%{transform:translateY(0)} 50%{transform:translateY(-8px)} }

/* ── Barvy textu ─────────────────────────────────────── */
.text-app-orange { color: var(--orange) !important; }
.text-app-green  { color: var(--green)  !important; }
.text-app-blue   { color: var(--blue)   !important; }
.text-app-purple { color: var(--purple) !important; }
.text-app-red    { color: var(--red)    !important; }

/* ── Vlastní tlačítka ────────────────────────────────── */
.btn { font-family: 'Potta One', cursive; letter-spacing: .03em; }
.btn:active { transform: scale(.97); }

.btn-app-orange { background: var(--orange); color: #fff; border: none; box-shadow: 0 6px 0 #c44a1a; }
.btn-app-orange:hover, .btn-app-orange:focus { color: #fff; background: var(--orange); box-shadow: 0 4px 0 #c44a1a; transform: translateY(2px); }

.btn-app-green { background: var(--green); color: #fff; border: none; box-shadow: 0 6px 0 #3d9e4a; }
.btn-app-green:hover, .btn-app-green:focus { color: #fff; background: var(--green); box-shadow: 0 4px 0 #3d9e4a; transform: translateY(2px); }

.btn-app-blue { background: var(--blue); color: #fff; border: none; box-shadow: 0 6px 0 #1a5fcc; }
.btn-app-blue:hover, .btn-app-blue:focus { color: #fff; background: var(--blue); box-shadow: 0 4px 0 #1a5fcc; transform: translateY(2px); }

/* ── Formulářové prvky ───────────────────────────────── */
.form-control { font-family: 'Nunito', sans-serif; font-weight: 600; border: 2.5px solid #e0e0e0; border-radius: 12px; }
.form-control:focus { border-color: var(--blue); box-shadow: 0 0 0 .2rem rgba(77,150,255,.2); }
#inp-odpoved-nas, #inp-odpoved-mocniny { font-size: 1.8rem; }

/* ── Chybové hlášení ─────────────────────────────────── */
.error-msg { color: var(--orange); font-size: .9rem; font-weight: 700; text-align: center; min-height: 20px; }

/* ── Oddělovač / Host ────────────────────────────────── */
.login-divider { display: flex; align-items: center; gap: 10px; color: #ccc; font-size: .85rem; }
.login-divider::before, .login-divider::after { content: ''; flex: 1; height: 1px; background: #e8e8e8; }

.guest-badge { font-size: .82rem; font-weight: 700; color: #888; background: #f5f5f5; border-radius: 8px; padding: 5px 12px; display: none; }
.guest-badge.visible { display: inline-block; }

/* ── Odkaz / navigace ────────────────────────────────── */
.nav-link-app { color: #aaa; cursor: pointer; font-weight: 600; font-size: .9rem; }
.nav-link-app span { color: var(--blue); text-decoration: underline; }

/* ── Kartičky výběru hry ─────────────────────────────── */
.game-card {
  border-radius: 16px;
  padding: 22px 14px;
  text-align: center;
  cursor: pointer;
  border: 3px solid transparent;
  transition: transform .2s, border-color .2s, box-shadow .2s;
  height: 100%;
}
.game-card:hover { transform: translateY(-4px); box-shadow: 0 8px 24px rgba(0,0,0,.12); }
.game-card-icon  { font-size: 40px; display: block; margin-bottom: 8px; }
.game-card-title { font-family: 'Potta One', cursive; font-size: 1.05rem; color: var(--dark); }
.game-card-sub   { font-size: .78rem; color: #888; margin-top: 4px; }

.game-card.nasobilka  { background: #fff3e0; border-color: var(--yellow); }
.game-card.nasobilka:hover  { border-color: var(--orange); }
.game-card.vyjmenovana { background: #f0e8ff; border-color: #d4b0ff; }
.game-card.vyjmenovana:hover { border-color: var(--purple); }
.game-card.matematika { background: #fff3e0; border-color: var(--yellow); }
.game-card.matematika:hover { border-color: var(--orange); }
.game-card.cestina    { background: #f0e8ff; border-color: #d4b0ff; }
.game-card.cestina:hover    { border-color: var(--purple); }
.game-card.mocniny    { background: #e8f4fd; border-color: var(--blue); }
.game-card.mocniny:hover    { border-color: #1a5fcc; }
.game-card.predpony   { background: #e0f7fa; border-color: #26C6DA; }
.game-card.predpony:hover   { border-color: #00838f; }
.game-card.pravopis-e { background: #fce4ec; border-color: #f48fb1; }
.game-card.pravopis-e:hover { border-color: #e91e63; }
.game-card.informatika { background: #e8eaf6; border-color: #7986CB; }
.game-card.informatika:hover { border-color: #3F51B5; }
.game-card.klavesnice  { background: #e8eaf6; border-color: #7986CB; }
.game-card.klavesnice:hover  { border-color: #3F51B5; }
.game-card.prepis      { background: #e0f2f1; border-color: #26a69a; }
.game-card.prepis:hover      { border-color: #00695c; }

/* ── Boxy skóre ──────────────────────────────────────── */
.score-box { border-radius: 14px; }
.score-box.personal { background: #fff3e0; border: 2px solid var(--yellow); }
.score-box.global   { background: #e8f4fd; border: 2px solid var(--blue); }
.score-label { font-size: .76rem; font-weight: 700; text-transform: uppercase; letter-spacing: .05em; color: #888; margin-bottom: 4px; }
.score-value { font-family: 'Nunito', sans-serif; font-size: 2rem; font-weight: 800; }

/* ── Herní statistiky ────────────────────────────────── */
.game-stat .stat-label { font-size: .72rem; font-weight: 700; text-transform: uppercase; color: #aaa; letter-spacing: .05em; }
.game-stat .stat-value { font-family: 'Potta One', cursive; font-size: 1.55rem; color: var(--dark); line-height: 1.1; }

/* ── Progress bar ────────────────────────────────────── */
.progress { border-radius: 999px; }
.progress-bar { border-radius: 999px; }
.progress-nasobilka { background: linear-gradient(90deg, var(--orange), var(--yellow)); transition: width 1s linear; }
.progress-vyjm      { background: linear-gradient(90deg, var(--purple), #f0b0ff); transition: width .4s ease; }
.progress-mocniny   { background: linear-gradient(90deg, var(--blue), #a0d4ff); transition: width .4s ease; }
.progress-predp     { background: linear-gradient(90deg, #26C6DA, #80DEEA); transition: width .4s ease; }
.progress-pe        { background: linear-gradient(90deg, #e91e63, #f48fb1); transition: width .4s ease; }
.progress-klav      { background: linear-gradient(90deg, #3F51B5, #7986CB); transition: width 1s linear; }
.progress-prepis    { background: linear-gradient(90deg, #26a69a, #80cbc4); transition: width 1s linear; }

/* ── Príklad násobilky ───────────────────────────────── */
.priklad { font-family: 'Nunito', sans-serif; font-size: 3.5rem; font-weight: 800; color: var(--dark); line-height: 1; }
@keyframes popIn { from{transform:scale(.7);opacity:0} to{transform:scale(1);opacity:1} }
.komentar { min-height: 24px; font-size: 1rem; font-weight: 700; color: #888; text-align: center; margin-top: 6px; }
.komentar.correct { color: var(--green); }
.komentar.wrong   { color: var(--red); }

/* ── Input group pro odpovědi ────────────────────────── */
.input-group .btn { border-radius: 0 12px 12px 0 !important; }
.input-group .form-control { border-radius: 12px 0 0 12px !important; }
.shake { animation: shake .3s; border-color: var(--red) !important; }
@keyframes shake { 0%,100%{transform:translateX(0)} 25%{transform:translateX(-6px)} 75%{transform:translateX(6px)} }

/* ── Vyjmenovaná slova – hra ─────────────────────────── */
.vyjm-veta { font-family: 'Nunito', sans-serif; font-size: 1.75rem; font-weight: 700; color: var(--dark); line-height: 1.4; word-break: break-word; }
.vyjm-veta .blank { color: var(--purple); border-bottom: 3px solid var(--purple); padding: 0 4px; min-width: 36px; display: inline-block; }

.vyjm-btn { font-family: 'Nunito', sans-serif !important; font-size: 1.6rem !important; padding: 14px !important; border-radius: 14px !important; font-weight: 700 !important; }
.vyjm-btn.y  { background: #fff3e0 !important; color: var(--orange) !important; box-shadow: 0 5px 0 #e8a020; border: 2.5px solid var(--yellow) !important; }
.vyjm-btn.i  { background: #e8f4fd !important; color: var(--blue) !important;   box-shadow: 0 5px 0 #1a5fcc; border: 2.5px solid var(--blue) !important; }
.vyjm-btn.yy { background: #ffeef0 !important; color: var(--red) !important;    box-shadow: 0 5px 0 #cc3030; border: 2.5px solid var(--red) !important; }
.vyjm-btn.ii { background: #f0e8ff !important; color: var(--purple) !important; box-shadow: 0 5px 0 #8a3dcc; border: 2.5px solid var(--purple) !important; }
.vyjm-btn.correct-flash { background: var(--green) !important; color: #fff !important; border-color: var(--green) !important; }
.vyjm-btn.wrong-flash   { background: var(--red)   !important; color: #fff !important; border-color: var(--red)   !important; }

/* ── Mocniny – výběr kategorie ───────────────────────── */
.mocniny-card {
  border-radius: 16px; padding: 16px 10px; text-align: center; cursor: pointer;
  border: 3px solid transparent; transition: transform .2s, border-color .2s, box-shadow .2s;
  user-select: none; -webkit-user-select: none; height: 100%;
}
.mocniny-card * { pointer-events: none; }
.mocniny-card:hover { transform: translateY(-4px); box-shadow: 0 8px 24px rgba(0,0,0,.12); }
.mocniny-icon  { font-size: 1.7rem; font-weight: 700; display: block; margin-bottom: 5px; color: var(--dark); }
.mocniny-title { font-family: 'Potta One', cursive; font-size: .88rem; color: var(--dark); }
.mocniny-sub   { font-size: .7rem; color: #888; margin-top: 3px; }

.mocniny-card.pow2  { background: #fff3e0; border-color: var(--yellow); }
.mocniny-card.pow2:hover  { border-color: var(--orange); }
.mocniny-card.root2 { background: #e8f4fd; border-color: var(--blue); }
.mocniny-card.root2:hover { border-color: #1a5fcc; }
.mocniny-card.pow3  { background: #ffeef0; border-color: var(--red); }
.mocniny-card.pow3:hover  { border-color: #cc3030; }
.mocniny-card.root3 { background: #f0e8ff; border-color: var(--purple); }
.mocniny-card.root3:hover { border-color: #8a3dcc; }
.mocniny-card.neg   { background: #fce4ec; border-color: #f48fb1; }
.mocniny-card.neg:hover   { border-color: #e91e63; }
.mocniny-card.dec   { background: #e8f5e9; border-color: #a5d6a7; }
.mocniny-card.dec:hover   { border-color: #4caf50; }
.mocniny-card.frac  { background: #fff8e1; border-color: #ffe082; }
.mocniny-card.frac:hover  { border-color: #ffc107; }

.mocniny-card.selected { position: relative; }
.mocniny-card.selected::after { content: '✓'; position: absolute; top: 6px; right: 10px; font-size: .9rem; font-weight: 900; }
.mocniny-card.pow2.selected  { background: #ffd090; border-color: var(--orange); box-shadow: 0 4px 0 #c44a1a; }
.mocniny-card.root2.selected { background: #b8dcf4; border-color: #1a5fcc;      box-shadow: 0 4px 0 #1a5fcc; }
.mocniny-card.pow3.selected  { background: #ffc0c0; border-color: #cc3030;      box-shadow: 0 4px 0 #cc3030; }
.mocniny-card.root3.selected { background: #d8c8ff; border-color: #8a3dcc;      box-shadow: 0 4px 0 #8a3dcc; }
.mocniny-card.neg.selected   { background: #f8bbd0; border-color: #e91e63;      box-shadow: 0 4px 0 #c2185b; }
.mocniny-card.dec.selected   { background: #c8e6c9; border-color: #4caf50;      box-shadow: 0 4px 0 #388e3c; }
.mocniny-card.frac.selected  { background: #ffecb3; border-color: #ffc107;      box-shadow: 0 4px 0 #f57f17; }

.mocniny-error { color: var(--red); font-size: .88rem; font-weight: 700; min-height: 18px; }

/* ── Mocniny – herní obrazovka ───────────────────────── */
.mocniny-priklad { font-size: 1.4rem; min-height: 70px; display: flex; align-items: center; justify-content: center; }
.mocniny-priklad .katex-display { margin: 0; }

.btn-neexistuje {
  display: block; width: 100%; padding: 13px;
  border: 2.5px solid #ddd; border-radius: 14px;
  background: #f8f8f8; color: #999;
  font-family: 'Potta One', cursive; font-size: 1rem;
  cursor: pointer; transition: border-color .2s, color .2s, background .2s;
}
.btn-neexistuje:hover   { border-color: var(--red); color: var(--red); background: #fff0f0; }
.btn-neexistuje:disabled { opacity: .35; cursor: default; pointer-events: none; }

/* ── Tlačítko fialové ────────────────────────────────── */
.btn-app-purple { background: var(--purple); color: #fff; border: none; box-shadow: 0 6px 0 #8a3dcc; }
.btn-app-purple:hover, .btn-app-purple:focus { color: #fff; background: var(--purple); box-shadow: 0 4px 0 #8a3dcc; transform: translateY(2px); }

/* ── Tlačítko růžové ─────────────────────────────────── */
.btn-app-pink { background: #e91e63; color: #fff; border: none; box-shadow: 0 6px 0 #880e4f; }
.btn-app-pink:hover, .btn-app-pink:focus { color: #fff; background: #e91e63; box-shadow: 0 4px 0 #880e4f; transform: translateY(2px); }

/* ── Tlačítko modrofialové (informatika) ─────────────── */
.btn-app-indigo { background: #3F51B5; color: #fff; border: none; box-shadow: 0 6px 0 #283593; }
.btn-app-indigo:hover, .btn-app-indigo:focus { color: #fff; background: #3F51B5; box-shadow: 0 4px 0 #283593; transform: translateY(2px); }

/* ── Kategorie vyjmenovaných slov ────────────────────── */
.kat-card {
  border-radius: 14px; padding: 14px 4px; text-align: center; cursor: pointer;
  border: 3px solid transparent; transition: transform .15s, border-color .2s, box-shadow .2s;
  user-select: none; -webkit-user-select: none; position: relative;
}
.kat-card * { pointer-events: none; }
.kat-card:hover { transform: translateY(-3px); box-shadow: 0 6px 18px rgba(0,0,0,.12); }
.kat-letter { font-family: 'Potta One', cursive; font-size: 1.9rem; display: block; line-height: 1; }
.kat-hint   { font-size: .67rem; color: #888; margin-top: 3px; }

.kat-card.kat-b { background: #fff3e0; border-color: var(--yellow); }
.kat-card.kat-b:hover { border-color: var(--orange); }
.kat-card.kat-l { background: #e8f4fd; border-color: var(--blue); }
.kat-card.kat-l:hover { border-color: #1a5fcc; }
.kat-card.kat-m { background: #e8f8ee; border-color: var(--green); }
.kat-card.kat-m:hover { border-color: #3d9e4a; }
.kat-card.kat-p { background: #f0e8ff; border-color: var(--purple); }
.kat-card.kat-p:hover { border-color: #8a3dcc; }
.kat-card.kat-s { background: #ffeef0; border-color: var(--red); }
.kat-card.kat-s:hover { border-color: #cc3030; }
.kat-card.kat-v { background: #fffde7; border-color: var(--yellow); }
.kat-card.kat-v:hover { border-color: #f9a825; }
.kat-card.kat-z { background: #e0f7fa; border-color: #26C6DA; }
.kat-card.kat-z:hover { border-color: #00838f; }

.kat-card.selected::after { content: '✓'; position: absolute; top: 4px; right: 7px; font-size: .72rem; font-weight: 900; }
.kat-card.kat-b.selected { background: #ffd090; border-color: var(--orange); box-shadow: 0 4px 0 #c44a1a; }
.kat-card.kat-b.selected::after { color: var(--orange); }
.kat-card.kat-l.selected { background: #b8dcf4; border-color: #1a5fcc;  box-shadow: 0 4px 0 #1a5fcc; }
.kat-card.kat-l.selected::after { color: #1a5fcc; }
.kat-card.kat-m.selected { background: #c8e6c9; border-color: #3d9e4a;  box-shadow: 0 4px 0 #3d9e4a; }
.kat-card.kat-m.selected::after { color: #3d9e4a; }
.kat-card.kat-p.selected { background: #d8c8ff; border-color: #8a3dcc;  box-shadow: 0 4px 0 #8a3dcc; }
.kat-card.kat-p.selected::after { color: #8a3dcc; }
.kat-card.kat-s.selected { background: #ffc0c0; border-color: #cc3030;  box-shadow: 0 4px 0 #cc3030; }
.kat-card.kat-s.selected::after { color: #cc3030; }
.kat-card.kat-v.selected { background: #fff176; border-color: #f9a825;  box-shadow: 0 4px 0 #f9a825; }
.kat-card.kat-v.selected::after { color: #f9a825; }
.kat-card.kat-z.selected { background: #b2ebf2; border-color: #00838f;  box-shadow: 0 4px 0 #00838f; }
.kat-card.kat-z.selected::after { color: #00838f; }

/* ── Pravopis ě – tlačítka odpovědí ──────────────────── */
.pe-btn { font-family: 'Nunito', sans-serif !important; font-size: 2rem !important; padding: 16px !important; border-radius: 14px !important; font-weight: 800 !important; }
.pe-btn.pe-e  { background: #fce4ec !important; color: #e91e63 !important; box-shadow: 0 5px 0 #880e4f; border: 2.5px solid #f48fb1 !important; }
.pe-btn.pe-je { background: #e8f4fd !important; color: var(--blue) !important; box-shadow: 0 5px 0 #1a5fcc; border: 2.5px solid var(--blue) !important; }
.pe-btn.pe-ne { background: #e8f8ee !important; color: #3d9e4a !important; box-shadow: 0 5px 0 #3d9e4a; border: 2.5px solid var(--green) !important; }
.pe-btn.correct-flash { background: var(--green) !important; color: #fff !important; border-color: var(--green) !important; }
.pe-btn.wrong-flash   { background: var(--red)   !important; color: #fff !important; border-color: var(--red)   !important; }

/* ── Klávesnice – kategorie znaků ────────────────────── */
.kat-card.kat-klav-mala { background: #e8f4fd; border-color: var(--blue); }
.kat-card.kat-klav-mala:hover  { border-color: #1a5fcc; }
.kat-card.kat-klav-velka { background: #f0e8ff; border-color: var(--purple); }
.kat-card.kat-klav-velka:hover { border-color: #8a3dcc; }
.kat-card.kat-klav-cisla { background: #fff3e0; border-color: var(--yellow); }
.kat-card.kat-klav-cisla:hover { border-color: var(--orange); }
.kat-card.kat-klav-diakr { background: #e8f8ee; border-color: var(--green); }
.kat-card.kat-klav-diakr:hover { border-color: #3d9e4a; }

.kat-card.kat-klav-mala.selected  { background: #b8dcf4; border-color: #1a5fcc; box-shadow: 0 4px 0 #1a5fcc; }
.kat-card.kat-klav-mala.selected::after  { color: #1a5fcc; }
.kat-card.kat-klav-velka.selected { background: #d8c8ff; border-color: #8a3dcc; box-shadow: 0 4px 0 #8a3dcc; }
.kat-card.kat-klav-velka.selected::after { color: #8a3dcc; }
.kat-card.kat-klav-cisla.selected { background: #ffd090; border-color: var(--orange); box-shadow: 0 4px 0 #c44a1a; }
.kat-card.kat-klav-cisla.selected::after { color: var(--orange); }
.kat-card.kat-klav-diakr.selected { background: #c8e6c9; border-color: #3d9e4a; box-shadow: 0 4px 0 #3d9e4a; }
.kat-card.kat-klav-diakr.selected::after { color: #3d9e4a; }

/* ── Přepis textu ─────────────────────────────────────── */
.prepis-box {
  font-family: 'JetBrains Mono', monospace;
  font-size: 1.1rem;
  line-height: 2.2rem;
  height: calc(3 * 2.2rem + 28px);
  background: #f5f5f5;
  border-radius: 12px;
  padding: 14px 16px;
  overflow: hidden;
  user-select: none;
  -webkit-user-select: none;
}
.prepis-char         { color: #bbb; }
.prepis-char.typed   { color: #3d9e4a; }
.prepis-char.current { color: var(--dark); background: #ffe082; border-radius: 2px; }
.prepis-char.error   { color: #fff; background: var(--red); border-radius: 2px; }

/* ── Klávesnice – zobrazení znaku ────────────────────── */
.klav-znak {
  font-family: 'JetBrains Mono', monospace;
  font-size: 8rem;
  font-weight: 700;
  color: var(--dark);
  line-height: 1;
  transition: color .1s;
  user-select: none;
  -webkit-user-select: none;
}
.klav-znak.correct-flash-klav { color: var(--green); }
.klav-znak.wrong-flash-klav   { color: var(--red); }

/* ── Kategorie předpon ───────────────────────────────── */
.kat-card.kat-predp-s  { background: #e8f4fd; border-color: var(--blue); }
.kat-card.kat-predp-s:hover  { border-color: #1a5fcc; }
.kat-card.kat-predp-z  { background: #e8f8ee; border-color: var(--green); }
.kat-card.kat-predp-z:hover  { border-color: #3d9e4a; }
.kat-card.kat-predp-vz { background: #fff3e0; border-color: var(--yellow); }
.kat-card.kat-predp-vz:hover { border-color: var(--orange); }

.kat-card.kat-predp-s.selected  { background: #b8dcf4; border-color: #1a5fcc; box-shadow: 0 4px 0 #1a5fcc; }
.kat-card.kat-predp-s.selected::after  { color: #1a5fcc; }
.kat-card.kat-predp-z.selected  { background: #c8e6c9; border-color: #3d9e4a; box-shadow: 0 4px 0 #3d9e4a; }
.kat-card.kat-predp-z.selected::after  { color: #3d9e4a; }
.kat-card.kat-predp-vz.selected { background: #ffd090; border-color: var(--orange); box-shadow: 0 4px 0 #c44a1a; }
.kat-card.kat-predp-vz.selected::after { color: var(--orange); }

/* ── Předpony – tlačítka odpovědí ─────────────────────── */
.predp-btn { font-family: 'Potta One', cursive !important; font-size: 1.6rem !important; padding: 14px !important; border-radius: 14px !important; }
.predp-btn.predp-s  { background: #e8f4fd !important; color: var(--blue) !important;   box-shadow: 0 5px 0 #1a5fcc; border: 2.5px solid var(--blue) !important; }
.predp-btn.predp-z  { background: #e8f8ee !important; color: #3d9e4a !important;        box-shadow: 0 5px 0 #3d9e4a; border: 2.5px solid var(--green) !important; }
.predp-btn.predp-vz { background: #fff3e0 !important; color: var(--orange) !important;  box-shadow: 0 5px 0 #c44a1a; border: 2.5px solid var(--yellow) !important; }
.predp-btn.correct-flash { background: var(--green) !important; color: #fff !important; border-color: var(--green) !important; }
.predp-btn.wrong-flash   { background: var(--red)   !important; color: #fff !important; border-color: var(--red)   !important; }

/* ── Stupně – vyjmenovaná slova ──────────────────────── */
.stupen-card {
  border-radius: 16px; padding: 28px 14px; text-align: center; cursor: pointer;
  border: 3px solid transparent; transition: transform .2s, border-color .2s, box-shadow .2s;
  user-select: none; -webkit-user-select: none; height: 100%;
}
.stupen-card * { pointer-events: none; }
.stupen-card:hover { transform: translateY(-4px); box-shadow: 0 8px 24px rgba(0,0,0,.12); }
.stupen-card.stupen-1 { background: #e8f8ee; border-color: #6BCB77; }
.stupen-card.stupen-1:hover { border-color: #3d9e4a; }
.stupen-card.stupen-2 { background: #f0e8ff; border-color: #C77DFF; }
.stupen-card.stupen-2:hover { border-color: #8a3dcc; }
.stupen-icon  { font-size: 48px; display: block; margin-bottom: 10px; }
.stupen-title { font-family: 'Potta One', cursive; font-size: 1.25rem; color: var(--dark); }
.stupen-sub   { font-size: .82rem; color: #888; margin-top: 6px; }

/* ── Výsledky ────────────────────────────────────────── */
.result-emoji     { font-size: 56px; display: block; margin-bottom: 6px; animation: bounce 1s ease-in-out infinite; }
.result-title     { font-family: 'Potta One', cursive; font-size: 1.8rem; color: var(--dark); margin-bottom: 4px; }
.result-score     { font-family: 'Nunito', sans-serif; font-size: 3.5rem; font-weight: 800; color: var(--orange); line-height: 1; }
.result-uspesnost { font-family: 'Potta One', cursive; font-size: 1.1rem; color: var(--purple); margin-bottom: 10px; }
.result-new-record { background: linear-gradient(135deg, var(--yellow), var(--orange)); color: #fff; border-radius: 12px; padding: 10px 20px; font-weight: 800; font-size: 1rem; margin-bottom: 14px; display: none; }

.prehled-wrap { max-height: 200px; overflow-y: auto; border-radius: 12px; }
.prehled-wrap::-webkit-scrollbar { width: 4px; }
.prehled-wrap::-webkit-scrollbar-thumb { background: #ddd; border-radius: 999px; }
.prehled-nadpis { font-weight: 700; font-size: .83rem; color: #888; padding: 4px 12px 6px; text-transform: uppercase; letter-spacing: .04em; }
.prehled-item { display: flex; align-items: flex-start; gap: 10px; padding: 8px 12px; border-radius: 10px; margin-bottom: 6px; font-size: .87rem; }
.prehled-item.ok    { background: #edfff0; border-left: 4px solid var(--green); }
.prehled-item.chyba { background: #fff0f0; border-left: 4px solid var(--red); }
.prehled-icon { font-size: 1rem; margin-top: 1px; flex-shrink: 0; }
.prehled-text { flex: 1; }
.prehled-veta { display: block; font-weight: 700; color: var(--dark); }
.prehled-veta strong { color: var(--green); }
.prehled-chyba-txt { display: block; font-size: .78rem; color: var(--red); margin-top: 2px; }

/* ── Žebříček ────────────────────────────────────────── */
.nav-tabs .nav-link { font-family: 'Nunito', sans-serif; font-size: 1rem; font-weight: 700; color: #aaa; border: 2.5px solid #e0e0e0; border-radius: 10px 10px 0 0; }
.nav-tabs .nav-link.active { color: var(--orange); border-color: var(--orange); background: #fff3e0; }
.nav-tabs { border-bottom: 2.5px solid #e0e0e0; gap: 6px; }

.lb-list { max-height: 300px; overflow-y: auto; margin-bottom: 20px; list-style: none; padding: 0; }
.lb-list::-webkit-scrollbar { width: 4px; }
.lb-list::-webkit-scrollbar-thumb { background: #ddd; border-radius: 999px; }
.lb-item { display: flex; align-items: center; gap: 12px; padding: 12px 14px; border-radius: 12px; margin-bottom: 8px; background: #f9f9f9; }
.lb-item.me     { background: #fff3e0; }
.lb-item.gold   { background: #fffbe6; }
.lb-item.silver { background: #f5f5f5; }
.lb-item.bronze { background: #fff3e8; }
.lb-rank  { font-family: 'Nunito', sans-serif; font-size: 1.3rem; width: 32px; text-align: center; }
.lb-name  { flex: 1; font-weight: 700; font-size: 1rem; color: var(--dark); }
.lb-score { font-family: 'Nunito', sans-serif; font-size: 1.4rem; color: var(--orange); font-weight: 800; }
.lb-sekce-title { font-family: 'Potta One', cursive; font-size: .82rem; color: #aaa; text-transform: uppercase; letter-spacing: .08em; padding: 6px 14px; margin-bottom: 4px; }
.lb-list-inner  { list-style: none; padding: 0; }
.lb-trida { font-size: .7rem; font-weight: 700; background: #e8f4fd; color: var(--blue); border-radius: 4px; padding: 1px 6px; margin-left: 4px; }

/* ── Rekordní hint ───────────────────────────────────── */
.record-hint { font-size: .9rem; font-weight: 700; color: #bbb; min-height: 20px; }
.record-hint.beating { color: var(--purple); }

/* ── Ukončit hru ─────────────────────────────────────── */
.btn-ukoncit { background: none; border: 2px solid #e0e0e0; border-radius: 10px; padding: 8px 20px; font-family: 'Potta One', sans-serif; font-size: .85rem; color: #bbb; cursor: pointer; transition: border-color .2s, color .2s; }
.btn-ukoncit:hover { border-color: var(--red); color: var(--red); }
.ukoncit-upozorneni { font-size: .77rem; color: #ccc; margin-top: 6px; }

/* ── Dotyková klávesnice ─────────────────────────────── */
.touch-keypad { display: none; }
@media (pointer: coarse) {
  .touch-keypad {
    display: block;
    position: fixed; bottom: 0; left: 0; right: 0;
    padding: 8px 12px calc(10px + env(safe-area-inset-bottom));
    background: #fff; border-top: 2px solid #e8e8e8;
    box-shadow: 0 -6px 20px rgba(0,0,0,.1); z-index: 200;
  }
  #screen-game-mocniny, #screen-game-nasobilka, #screen-game-nsd-nsn {
    padding-bottom: calc(245px + env(safe-area-inset-bottom));
  }
}
.keypad-grid { display: grid; gap: 8px; }
.keypad-3col { grid-template-columns: repeat(3, 1fr); }
.keypad-4col { grid-template-columns: repeat(4, 1fr); }
.kkey {
  padding: 16px 8px; border: none; border-radius: 12px;
  font-family: 'Potta One', cursive; font-size: 1.4rem; cursor: pointer;
  background: #f5f5f5; color: var(--dark); box-shadow: 0 3px 0 #d5d5d5;
  transition: transform .1s, box-shadow .1s;
  user-select: none; -webkit-user-select: none; touch-action: manipulation;
}
.kkey:active       { transform: translateY(2px); box-shadow: 0 1px 0 #d5d5d5; }
.kkey-back         { background: #fff0f0; color: var(--red);   box-shadow: 0 3px 0 #f0b0b0; }
.kkey-back:active  { box-shadow: 0 1px 0 #f0b0b0; }
.kkey-spec         { background: #e8f4fd; color: var(--blue);  box-shadow: 0 3px 0 #90c0e8; }
.kkey-spec:active  { box-shadow: 0 1px 0 #90c0e8; }
.kkey-confirm      { background: var(--green); color: #fff;    box-shadow: 0 3px 0 #3d9e4a; }
.kkey-confirm:active { box-shadow: 0 1px 0 #3d9e4a; }
.kkey-empty        { background: transparent; box-shadow: none; pointer-events: none; }

/* ── Profil hráče ────────────────────────────────────── */
.profil-header {
  display: flex;
  align-items: center;
  gap: 16px;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  border-radius: 18px;
  padding: 20px 22px;
}
.profil-avatar {
  font-size: 2.6rem;
  width: 62px; height: 62px;
  background: rgba(255,255,255,.2);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.profil-header-info { flex: 1; min-width: 0; }
.profil-jmeno {
  font-family: 'Potta One', cursive;
  font-size: 1.5rem;
  color: #fff;
  line-height: 1.2;
  word-break: break-word;
}
.profil-trida-badge {
  display: inline-block;
  background: rgba(255,255,255,.25);
  border-radius: 20px;
  padding: 3px 12px;
  font-size: .8rem; font-weight: 700;
  color: #fff; margin-top: 5px;
}
.profil-sekce { margin-bottom: 4px; }
.profil-sekce-nadpis {
  font-family: 'Potta One', cursive;
  font-size: .82rem;
  color: #aaa;
  text-transform: uppercase;
  letter-spacing: .06em;
  padding: 14px 0 7px;
}
.profil-radek {
  background: #f9f9f9;
  border-radius: 12px;
  padding: 11px 14px;
  margin-bottom: 7px;
}
.profil-radek-top {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 7px;
}
.profil-hra-icon  { font-size: 1.25rem; flex-shrink: 0; }
.profil-hra-name  { flex: 1; font-weight: 700; font-size: .9rem; color: var(--dark); }
.profil-hra-result {
  font-family: 'Nunito', sans-serif;
  font-size: 1.3rem; font-weight: 800;
  color: var(--orange); white-space: nowrap;
}
.profil-hra-result.dim { color: #ccc; }
.profil-unit { font-size: .7rem; font-weight: 600; color: #aaa; }
.profil-ranky { display: flex; gap: 6px; flex-wrap: wrap; }
.profil-rank {
  font-size: .75rem; font-weight: 700;
  padding: 4px 10px; border-radius: 20px;
  background: #ececec; color: #888;
  white-space: nowrap;
}
.profil-rank.gold   { background: #fffbe6; color: #b8860b; border: 1px solid #ffe066; }
.profil-rank.silver { background: #f5f5f5; color: #555;    border: 1px solid #bbb; }
.profil-rank.bronze { background: #fff4ec; color: #a05a2c; border: 1px solid #d4845a; }
.profil-rank.dim    { background: #f5f5f5; color: #ccc; }
.profil-z           { font-weight: 400; opacity: .7; }

/* ── Dělitelnost – sestřel čísla ─────────────────────── */
.game-card.delitelnost       { background: #fff8e1; border-color: #ffca28; }
.game-card.delitelnost:hover { border-color: #f9a825; }

.btn-app-amber { background: #fb8c00; color: #fff; border: none; box-shadow: 0 6px 0 #e65100; }
.btn-app-amber:hover, .btn-app-amber:focus { color: #fff; background: #fb8c00; box-shadow: 0 4px 0 #e65100; transform: translateY(2px); }

.del-progress { background: linear-gradient(90deg, #fb8c00, #ffca28); transition: width .4s ease; }

.mocniny-card.del-lehka        { background: #e8f8ee; border-color: #6BCB77; }
.mocniny-card.del-lehka:hover  { border-color: #3d9e4a; }
.mocniny-card.del-stredni      { background: #fff3e0; border-color: var(--yellow); }
.mocniny-card.del-stredni:hover{ border-color: var(--orange); }
.mocniny-card.del-tezka        { background: #ffeef0; border-color: var(--red); }
.mocniny-card.del-tezka:hover  { border-color: #cc3030; }

.mocniny-card.del-lehka.selected  { background: #c8e6c9; border-color: #3d9e4a;      box-shadow: 0 4px 0 #3d9e4a; }
.mocniny-card.del-stredni.selected{ background: #ffd090; border-color: var(--orange); box-shadow: 0 4px 0 #c44a1a; }
.mocniny-card.del-tezka.selected  { background: #ffc0c0; border-color: #cc3030;      box-shadow: 0 4px 0 #cc3030; }

.del-plocha {
  position: relative;
  width: 100%;
  height: 300px;
  background: linear-gradient(180deg, #0a1628 0%, #0d2040 60%, #0a1628 100%);
  border-radius: 16px;
  overflow: hidden;
  border: 2px solid rgba(77, 150, 255, 0.25);
  cursor: default;
}

.del-cislo {
  position: absolute;
  font-family: 'Potta One', cursive;
  font-size: 1.2rem;
  color: #ddeeff;
  background: rgba(77, 150, 255, 0.18);
  border: 2px solid rgba(77, 150, 255, 0.45);
  border-radius: 12px;
  width: 54px;
  height: 54px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  user-select: none;
  -webkit-user-select: none;
  touch-action: manipulation;
  transition: background .15s, border-color .15s;
}
.del-cislo:active { opacity: .75; transform: scale(.92); }
.del-correct { background: rgba(107, 203, 119, 0.85) !important; border-color: #6BCB77 !important; color: #fff !important; }
.del-wrong   { background: rgba(255, 107, 107, 0.85) !important; border-color: #FF6B6B !important; color: #fff !important; }

.del-vyzva-box {
  font-family: 'Potta One', cursive;
  font-size: .92rem;
  color: var(--dark);
  background: #fff8e1;
  border: 2px solid #ffca28;
  border-radius: 10px;
  padding: 6px 14px;
  text-align: center;
  width: 100%;
}
.del-uroven-label { font-size: .73rem; font-weight: 700; color: #aaa; white-space: nowrap; }
.del-zivoty { font-size: 1rem; letter-spacing: 1px; }
.del-hint { font-size: .88rem; font-weight: 700; color: #bbb; min-height: 20px; }
.del-hint.del-ok      { color: var(--green); }
.del-hint.del-nok     { color: var(--red); }
.del-hint.del-levelup { color: var(--purple); }

/* ── NSN a NSD ───────────────────────────────────────── */
.game-card.nsd-nsn       { background: #e8f5e9; border-color: #81c784; }
.game-card.nsd-nsn:hover { border-color: #2e7d32; }

.btn-app-teal { background: #43a047; color: #fff; border: none; box-shadow: 0 6px 0 #1b5e20; }
.btn-app-teal:hover, .btn-app-teal:focus { color: #fff; background: #43a047; box-shadow: 0 4px 0 #1b5e20; transform: translateY(2px); }

.progress-nsd-nsn { background: linear-gradient(90deg, #43a047, #a5d6a7); transition: width .4s ease; }

.mocniny-card.nsn-card       { background: #e8f4fd; border-color: var(--blue); }
.mocniny-card.nsn-card:hover { border-color: #1a5fcc; }
.mocniny-card.nsd-card       { background: #fff3e0; border-color: var(--yellow); }
.mocniny-card.nsd-card:hover { border-color: var(--orange); }
.mocniny-card.obe-card       { background: #f0e8ff; border-color: #d4b0ff; }
.mocniny-card.obe-card:hover { border-color: var(--purple); }

.mocniny-card.nsn-card.selected { background: #b8dcf4; border-color: #1a5fcc;      box-shadow: 0 4px 0 #1a5fcc; }
.mocniny-card.nsd-card.selected { background: #ffd090; border-color: var(--orange); box-shadow: 0 4px 0 #c44a1a; }
.mocniny-card.obe-card.selected { background: #d8c8ff; border-color: #8a3dcc;      box-shadow: 0 4px 0 #8a3dcc; }

.nsd-nsn-oper-label {
  font-family: 'Potta One', cursive;
  font-size: 1.2rem;
  color: #43a047;
  letter-spacing: .08em;
  margin-bottom: 2px;
}

/* ── Viditelnost obrazovek ───────────────────────────── */
.screen         { display: none; }
.screen.active  { display: block; }