/* ═══════════════════════════════════════════════════════════
   HIT THE BUTTON  –  Game CSS  v3.0  FINAL
   Topmarks-inspired dark board + vivid circular buttons
   + voice/streak glow + confetti + full responsive
   ═══════════════════════════════════════════════════════════ */

@import url('https://fonts.googleapis.com/css2?family=Nunito:ital,wght@0,400;0,600;0,700;0,800;0,900;1,800&display=swap');

/* ── CSS custom properties ─────────────────────────────── */
:root {
  /* Brand */
  --c-primary : #1B3A8C;
  --c-accent  : #F59E0B;
  --c-teal    : #10B981;
  --c-white   : #ffffff;
  /* Board */
  --c-board1  : #0b1640;
  --c-board2  : #162272;
  --c-board3  : #1e2f8a;
  /* Buttons */
  --c-btn1    : #ff8c00;
  --c-btn2    : #e65c00;
  --c-btn-ring: #fbbf24;
  /* Status */
  --c-ok      : #22c55e;
  --c-err     : #ef4444;
  --c-streak  : #fbbf24;
  /* Misc */
  --font      : 'Nunito', sans-serif;
  --rad       : 18px;
  --shadow    : 0 8px 40px rgba(11,22,64,.4);
}

/* ══════════════════════════════════════════════════════════
   WRAPPER
   ══════════════════════════════════════════════════════════ */
.htb-wrapper {
  font-family : var(--font);
  max-width   : 840px;
  margin      : 0 auto 2.5rem;
  border-radius: var(--rad);
  overflow    : hidden;
  box-shadow  : var(--shadow);
  position    : relative;
}

/* ══════════════════════════════════════════════════════════
   CONTROLS  (top panel — mode selector)
   ══════════════════════════════════════════════════════════ */
.htb-controls {
  background: linear-gradient(135deg, var(--c-primary) 0%, #2d52c4 100%);
  padding   : 1.5rem 1.8rem 1.2rem;
  color     : var(--c-white);
}

/* Header row inside controls */
.htb-ctrl-header {
  display        : flex;
  align-items    : center;
  justify-content: space-between;
  margin-bottom  : 1rem;
}
.htb-ctrl-title {
  font-size  : 1.15rem;
  font-weight: 900;
  color      : var(--c-white);
  display    : flex;
  align-items: center;
  gap        : .5rem;
}
.htb-sound-toggle {
  background   : rgba(255,255,255,.15);
  border       : 2px solid rgba(255,255,255,.3);
  color        : var(--c-white);
  border-radius: 8px;
  width        : 36px; height: 36px;
  font-size    : 1.1rem;
  cursor       : pointer;
  transition   : all .2s;
  display      : flex; align-items: center; justify-content: center;
}
.htb-sound-toggle:hover  { background: rgba(255,255,255,.25); }
.htb-sound-toggle.muted  { opacity: .5; }

/* Row */
.htb-control-row {
  display    : flex;
  align-items: flex-start;
  gap        : .7rem;
  flex-wrap  : wrap;
  margin-bottom: .75rem;
}
.htb-control-row label {
  font-weight   : 800;
  font-size     : .72rem;
  text-transform: uppercase;
  letter-spacing: .08em;
  min-width     : 72px;
  padding-top   : .38rem;
  color         : rgba(255,255,255,.65);
}
.htb-btn-group { display: flex; flex-wrap: wrap; gap: .35rem; flex: 1; }

.htb-ctrl-btn {
  background  : rgba(255,255,255,.1);
  color       : rgba(255,255,255,.85);
  border      : 1.5px solid rgba(255,255,255,.2);
  border-radius: 8px;
  padding     : .3rem .68rem;
  font-size   : .76rem;
  font-family : var(--font);
  font-weight : 700;
  cursor      : pointer;
  transition  : all .18s;
  white-space : nowrap;
}
.htb-ctrl-btn:hover { background: rgba(255,255,255,.22); border-color: rgba(255,255,255,.5); }
.htb-ctrl-btn.active {
  background : var(--c-accent);
  border-color: var(--c-accent);
  color      : #111;
  box-shadow : 0 3px 10px rgba(245,158,11,.5);
}

/* Start button */
.htb-start-row { justify-content: center; margin-top: .6rem; }
.htb-start-btn {
  background   : linear-gradient(135deg, #fbbf24 0%, var(--c-accent) 100%);
  color        : #1a1a1a;
  border       : none;
  border-radius: 14px;
  padding      : .95rem 3.5rem;
  font-size    : 1.15rem;
  font-family  : var(--font);
  font-weight  : 900;
  cursor       : pointer;
  box-shadow   : 0 5px 20px rgba(245,158,11,.5), 0 0 0 0 rgba(245,158,11,.3);
  transition   : all .22s;
  letter-spacing: .04em;
}
.htb-start-btn:hover {
  transform  : translateY(-3px) scale(1.04);
  box-shadow : 0 10px 30px rgba(245,158,11,.6), 0 0 0 6px rgba(245,158,11,.12);
}

/* ══════════════════════════════════════════════════════════
   ARENA  (dark blue game board)
   ══════════════════════════════════════════════════════════ */
.htb-arena {
  background : linear-gradient(170deg, var(--c-board1) 0%, var(--c-board2) 55%, var(--c-board3) 100%);
  position   : relative;
  overflow   : hidden;
}

/* Subtle star dots bg */
.htb-arena::before {
  content   : '';
  position  : absolute; inset: 0;
  background: radial-gradient(circle at 20% 30%, rgba(255,255,255,.04) 1px, transparent 1px),
              radial-gradient(circle at 70% 60%, rgba(255,255,255,.03) 1px, transparent 1px),
              radial-gradient(circle at 50% 80%, rgba(255,255,255,.02) 1px, transparent 1px);
  background-size: 40px 40px, 60px 60px, 80px 80px;
  pointer-events: none;
}

/* Score bar */
.htb-scorebar {
  display        : flex;
  align-items    : center;
  justify-content: space-between;
  background     : rgba(0,0,0,.4);
  padding        : .7rem 1.6rem;
  backdrop-filter: blur(6px);
  border-bottom  : 1px solid rgba(255,255,255,.07);
  position       : relative; z-index: 2;
}
.htb-score-block { display: flex; flex-direction: column; align-items: center; min-width: 60px; }
.htb-score-num   { font-size: 1.9rem; font-weight: 900; color: var(--c-white); line-height: 1; transition: transform .15s; }
.htb-score-lbl   { font-size: .62rem; font-weight: 700; text-transform: uppercase; letter-spacing: .09em; color: rgba(255,255,255,.5); margin-top: 2px; }
.htb-score-live .htb-score-num { color: #4ade80; }
.htb-score-best .htb-score-num { color: var(--c-accent); }

/* Score bump animation */
@keyframes htb-bump { 0%{transform:scale(1)} 50%{transform:scale(1.3)} 100%{transform:scale(1)} }
.htb-score-bump { animation: htb-bump .25s ease; }

/* Timer ring */
.htb-timer-block  { display: flex; align-items: center; justify-content: center; }
.htb-timer-ring   { position: relative; width: 62px; height: 62px; }
.htb-timer-ring svg { transform: rotate(-90deg); display: block; }
.htb-ring-bg      { fill: none; stroke: rgba(255,255,255,.12); stroke-width: 5; }
.htb-ring-fill    { fill: none; stroke: #4ade80; stroke-width: 5; stroke-linecap: round; transition: stroke-dashoffset .95s linear, stroke .5s; }
.htb-ring-warn    { stroke: var(--c-accent) !important; }
.htb-ring-danger  { stroke: #f87171 !important; }
.htb-timer-num    {
  position: absolute; top:50%; left:50%; transform: translate(-50%,-50%);
  font-size: 1rem; font-weight: 900; color: var(--c-white);
}

/* ─ Question area ──────────────────────────────────────── */
.htb-question-area {
  text-align: center;
  padding   : 1.8rem 1rem .8rem;
  position  : relative; z-index:2;
}
.htb-question-box {
  display    : inline-block;
  font-size  : clamp(2.4rem, 7vw, 4rem);
  font-weight: 900;
  color      : #fde047;   /* bright yellow */
  text-shadow: 0 0 30px rgba(253,224,71,.4), 0 2px 8px rgba(0,0,0,.5);
  letter-spacing: .02em;
  min-height : 1.2em;
}
.htb-question-box.htb-qpop { animation: htb-qpop .28s cubic-bezier(.36,2,.6,1); }
@keyframes htb-qpop { from{transform:scale(.7) rotate(-4deg);opacity:.4} to{transform:scale(1) rotate(0deg);opacity:1} }

.htb-streak {
  min-height : 1.7rem;
  font-size  : 1rem;
  font-weight: 800;
  color      : var(--c-streak);
  letter-spacing: .04em;
  text-shadow: 0 0 12px rgba(251,191,36,.6);
}

/* ─ Answer buttons (CIRCULAR) ─────────────────────────── */
.htb-answers {
  display              : grid;
  grid-template-columns: repeat(3, 1fr);
  gap                  : 1.1rem 1.4rem;
  padding              : .4rem 2.5rem 2rem;
  justify-items        : center;
  position             : relative; z-index:2;
}

/* Button entrance */
@keyframes htb-btn-in {
  from { transform: scale(0) rotate(-15deg); opacity:0; }
  to   { transform: scale(1) rotate(0deg);  opacity:1; }
}

.htb-answer-btn {
  width          : clamp(72px,16vw,100px);
  height         : clamp(72px,16vw,100px);
  border-radius  : 50%;
  background     : radial-gradient(circle at 35% 30%, #ffb347 0%, var(--c-btn1) 55%, var(--c-btn2) 100%);
  border         : 4px solid var(--c-btn-ring);
  color          : var(--c-white);
  font-family    : var(--font);
  font-size      : clamp(1.15rem, 3.5vw, 1.6rem);
  font-weight    : 900;
  cursor         : pointer;
  transition     : transform .15s cubic-bezier(.34,1.56,.64,1), box-shadow .15s, background .15s;
  box-shadow     : 0 6px 0 rgba(0,0,0,.4), 0 10px 24px rgba(0,0,0,.35), inset 0 1px 0 rgba(255,255,255,.25);
  text-shadow    : 0 1px 4px rgba(0,0,0,.45);
  user-select    : none;
  display        : flex; align-items: center; justify-content: center;
  padding        : 0;
  animation      : htb-btn-in .35s cubic-bezier(.36,1.8,.6,1) both;
  position       : relative;
  overflow       : hidden;
}

/* Shine overlay */
.htb-answer-btn::before {
  content  : '';
  position : absolute;
  top      : 8%; left: 15%;
  width    : 40%; height: 30%;
  background: rgba(255,255,255,.22);
  border-radius: 50%;
  pointer-events: none;
}

.htb-answer-btn:hover:not(:disabled) {
  transform  : translateY(-5px) scale(1.1);
  box-shadow : 0 10px 0 rgba(0,0,0,.3), 0 18px 36px rgba(255,140,0,.55);
  background : radial-gradient(circle at 35% 30%, #ffd080 0%, #ff9922 55%, #e65c00 100%);
}
.htb-answer-btn:active:not(:disabled) {
  transform  : translateY(2px) scale(.96);
  box-shadow : 0 2px 0 rgba(0,0,0,.4), 0 4px 10px rgba(0,0,0,.25);
}

/* Correct */
.htb-answer-btn.htb-correct {
  background : radial-gradient(circle at 35% 30%, #86efac 0%, #22c55e 55%, #15803d 100%) !important;
  border-color: #4ade80;
  box-shadow : 0 6px 0 rgba(0,0,0,.3), 0 0 28px rgba(34,197,94,.7) !important;
  animation  : htb-correct-pop .5s ease !important;
}
@keyframes htb-correct-pop {
  0%   { transform: scale(1); }
  30%  { transform: scale(1.22) rotate(5deg); }
  60%  { transform: scale(.95) rotate(-3deg); }
  100% { transform: scale(1) rotate(0); }
}

/* Wrong */
.htb-answer-btn.htb-wrong {
  background : radial-gradient(circle at 35% 30%, #fca5a5 0%, #ef4444 55%, #b91c1c 100%) !important;
  border-color: #f87171;
  animation  : htb-shake .4s ease !important;
}
/* Highlight correct when wrong chosen */
.htb-answer-btn.htb-highlight-correct {
  background : radial-gradient(circle at 35% 30%, #86efac 0%, #22c55e 55%, #15803d 100%) !important;
  border-color: #4ade80;
  box-shadow : 0 0 22px rgba(34,197,94,.6) !important;
}

@keyframes htb-shake {
  0%,100%{ transform: translateX(0); }
  20%    { transform: translateX(-10px) rotate(-3deg); }
  40%    { transform: translateX(10px)  rotate(3deg); }
  60%    { transform: translateX(-6px); }
  80%    { transform: translateX(6px); }
}

/* ─ Feedback ────────────────────────────────────────────── */
.htb-feedback {
  text-align : center;
  font-size  : 1.05rem;
  font-weight: 800;
  min-height : 1.7rem;
  padding    : 0 1rem .5rem;
  color      : var(--c-white);
  position   : relative; z-index:2;
}
.htb-fb-correct        { color: #4ade80; text-shadow: 0 0 12px rgba(74,222,128,.5); }
.htb-fb-wrong          { color: #f87171; text-shadow: 0 0 12px rgba(248,113,113,.4); }
.htb-fb-streak         { color: var(--c-streak) !important; font-size: 1.15rem; text-shadow: 0 0 16px rgba(251,191,36,.7) !important; }

/* ══════════════════════════════════════════════════════════
   RESULT SCREEN
   ══════════════════════════════════════════════════════════ */
.htb-result {
  background: linear-gradient(170deg, var(--c-board1) 0%, var(--c-board2) 100%);
  padding   : 1.8rem;
  position  : relative; overflow: hidden;
}
.htb-result-card {
  background   : linear-gradient(135deg, rgba(27,58,140,.9) 0%, rgba(46,82,192,.9) 100%);
  backdrop-filter: blur(10px);
  border       : 1px solid rgba(255,255,255,.12);
  color        : var(--c-white);
  border-radius: calc(var(--rad) - 4px);
  padding      : 2rem 1.5rem 2.2rem;
  text-align   : center;
  box-shadow   : 0 8px 40px rgba(0,0,0,.4);
  position     : relative; z-index:2;
}
.htb-result-trophy {
  font-size  : 3.6rem;
  line-height: 1;
  margin-bottom: .5rem;
  display    : block;
  animation  : htb-trophy-in .6s cubic-bezier(.36,1.8,.6,1);
}
@keyframes htb-trophy-in { from{transform:scale(0) rotate(-30deg)} to{transform:scale(1) rotate(0)} }

.htb-result-title {
  font-size  : 2rem;
  font-weight: 900;
  color      : var(--c-accent);
  margin     : 0 0 1.3rem;
  text-shadow: 0 0 20px rgba(245,158,11,.4);
}
.htb-result-stats {
  display        : flex;
  justify-content: center;
  gap            : 1rem;
  flex-wrap      : wrap;
  margin-bottom  : 1.6rem;
}
.htb-rs-item {
  display       : flex;
  flex-direction: column;
  align-items   : center;
  background    : rgba(255,255,255,.08);
  border        : 1px solid rgba(255,255,255,.12);
  border-radius : 14px;
  padding       : .9rem 1.4rem;
  min-width     : 82px;
  backdrop-filter: blur(4px);
}
.htb-rs-num { font-size: 2.5rem; font-weight: 900; line-height: 1; }
.htb-rs-lbl { font-size: .7rem; font-weight: 700; text-transform: uppercase; letter-spacing: .07em; opacity: .7; margin-top: 4px; }
.htb-rs-score .htb-rs-num   { color: var(--c-accent); text-shadow: 0 0 16px rgba(245,158,11,.5); }
.htb-rs-correct .htb-rs-num { color: #86efac; }
.htb-rs-wrong .htb-rs-num   { color: #fca5a5; }

/* Save form */
.htb-save-form {
  display        : flex;
  gap            : .6rem;
  justify-content: center;
  flex-wrap      : wrap;
  margin-bottom  : .5rem;
}
.htb-name-input {
  border       : 2px solid rgba(255,255,255,.25);
  border-radius: 10px;
  padding      : .55rem 1rem;
  font-family  : var(--font);
  font-size    : .95rem;
  background   : rgba(255,255,255,.1);
  color        : white;
  min-width    : 170px;
}
.htb-name-input::placeholder { color: rgba(255,255,255,.4); }
.htb-name-input:focus { outline: none; border-color: var(--c-accent); }
.htb-save-btn {
  background   : var(--c-teal);
  color        : white;
  border       : none;
  border-radius: 10px;
  padding      : .55rem 1.2rem;
  font-family  : var(--font);
  font-size    : .93rem;
  font-weight  : 700;
  cursor       : pointer;
  transition   : all .2s;
}
.htb-save-btn:hover    { background: #0ea572; transform: translateY(-1px); }
.htb-save-btn:disabled { opacity: .5; cursor: default; }
.htb-save-msg { font-size: .88rem; min-height: 1.4rem; display: block; }
.htb-msg-ok   { color: #86efac; }
.htb-msg-err  { color: #fca5a5; }

/* Action buttons */
.htb-result-actions { display: flex; gap: .8rem; justify-content: center; flex-wrap: wrap; margin-top: 1.1rem; }
.htb-play-again-btn, .htb-change-topic-btn {
  border       : none;
  border-radius: 12px;
  padding      : .78rem 1.8rem;
  font-family  : var(--font);
  font-size    : 1rem;
  font-weight  : 800;
  cursor       : pointer;
  transition   : all .2s;
}
.htb-play-again-btn {
  background : linear-gradient(135deg,#fbbf24,var(--c-accent));
  color      : #1a1a1a;
  box-shadow : 0 4px 16px rgba(245,158,11,.4);
}
.htb-play-again-btn:hover { transform: translateY(-3px); box-shadow: 0 8px 24px rgba(245,158,11,.55); }
.htb-change-topic-btn {
  background : rgba(255,255,255,.12);
  color      : white;
  border     : 1.5px solid rgba(255,255,255,.3);
}
.htb-change-topic-btn:hover { background: rgba(255,255,255,.22); transform: translateY(-1px); }

/* ══════════════════════════════════════════════════════════
   CONFETTI PIECES
   ══════════════════════════════════════════════════════════ */
@keyframes htb-confetti-fall {
  0%   { transform: translateY(-20px) rotate(0deg); opacity: 1; }
  100% { transform: translateY(250px) rotate(720deg); opacity: 0; }
}
.htb-confetti-piece {
  position   : absolute;
  top        : 0;
  animation  : htb-confetti-fall 1.4s ease-in forwards;
  z-index    : 10;
  pointer-events: none;
}

/* ══════════════════════════════════════════════════════════
   LEADERBOARD
   ══════════════════════════════════════════════════════════ */
.htb-leaderboard { font-family: var(--font); max-width: 840px; margin: 0 auto 2rem; }
.htb-lb-title {
  font-size: 1.4rem; font-weight: 900; color: var(--c-primary);
  text-align: center; margin-bottom: 1rem;
}
.htb-lb-table { width: 100%; border-collapse: collapse; font-size: .9rem; border-radius: 12px; overflow: hidden; }
.htb-lb-table th { background: var(--c-primary); color: white; padding: .65rem 1rem; text-align: left; font-weight: 700; }
.htb-lb-table td { padding: .55rem 1rem; border-bottom: 1px solid #f0f2f8; }
.htb-lb-table tr:hover td { background: #fafbff; }
.htb-lb-top td   { background: #fefce8; }
.htb-lb-score    { font-weight: 900; color: var(--c-primary); }
.htb-lb-rank     { font-size: 1.2rem; }
.htb-lb-empty    { text-align: center; color: #999; padding: 1.5rem 0; font-style: italic; }

/* ══════════════════════════════════════════════════════════
   STATS WIDGET
   ══════════════════════════════════════════════════════════ */
.htb-stats-widget { display:flex; gap:1rem; flex-wrap:wrap; justify-content:center; font-family:var(--font); margin:1rem 0; }
.htb-stat-item { display:flex; flex-direction:column; align-items:center; background:linear-gradient(135deg,#f0f4ff,#e8eef8); border-radius:14px; padding:1rem 1.8rem; min-width:100px; border:1px solid rgba(27,58,140,.1); }
.htb-stat-number { font-size:2rem; font-weight:900; color:var(--c-primary); }
.htb-stat-label  { font-size:.7rem; font-weight:700; text-transform:uppercase; letter-spacing:.07em; color:#888; margin-top:3px; }

/* ══════════════════════════════════════════════════════════
   RESPONSIVE
   ══════════════════════════════════════════════════════════ */
@media (max-width:600px){
  .htb-controls     { padding:1.2rem 1rem; }
  .htb-control-row  { flex-direction:column; }
  .htb-control-row label { min-width:auto; }
  .htb-scorebar     { padding:.5rem .8rem; }
  .htb-score-num    { font-size:1.5rem; }
  .htb-question-box { font-size:2rem; }
  .htb-answers      { gap:.65rem .8rem; padding:.4rem 1rem 1.5rem; }
  .htb-answer-btn   { width:clamp(60px,20vw,82px); height:clamp(60px,20vw,82px); font-size:1.1rem; }
  .htb-result-stats { gap:.7rem; }
  .htb-rs-num       { font-size:2rem; }
}
@media (max-width:380px){
  .htb-answers      { gap:.5rem; padding:.3rem .6rem 1.2rem; }
  .htb-answer-btn   { width:68px; height:68px; font-size:1rem; border-width:3px; }
}