/* Science Battle! — Frontend Game Styles */
.sb-wrap {
    --sb-me:   var(--me,  #00d4ff);
    --sb-op:   var(--op,  #ff5e3a);
    --sb-gold: var(--gold,#ffe040);
    --sb-bg:   var(--bg,  #07071a);
    --sb-me-bg:  #001e30;
    --sb-op-bg:  #2e0e00;
    --sb-green:  #00e676;
    --sb-red:    #ff1744;
    --sb-text:   #eef4ff;
    --sb-muted:  #7888aa;
    --sb-r:      16px;
    --sb-fh:     'Fredoka One', cursive;
    --sb-fb:     'Nunito', sans-serif;

    position: relative;
    width: 100%;
    height: 100svh;
    min-height: 480px;
    background: var(--sb-bg);
    font-family: var(--sb-fb);
    color: var(--sb-text);
    overflow: hidden;
    user-select: none;
    -webkit-tap-highlight-color: transparent;
}
@import url('https://fonts.googleapis.com/css2?family=Fredoka+One&family=Nunito:wght@700;800;900&display=swap');

#sb-bgCanvas { position: absolute; inset: 0; width: 100%; height: 100%; pointer-events: none; z-index: 0; }

/* ── Screens ──────────────────────────────────────── */
.sb-screen {
    position: absolute; inset: 0;
    display: flex; flex-direction: column;
    align-items: center; justify-content: center;
    z-index: 10; padding: 16px;
    transition: opacity .4s, transform .4s cubic-bezier(.4,0,.2,1);
    overflow-y: auto;
}
.sb-hidden { opacity: 0 !important; pointer-events: none !important; transform: scale(.95) !important; }

/* ── Animations ─────────────────────────────────── */
@keyframes sb-logoIn   { from{opacity:0;transform:translateY(-28px) scale(.8)} to{opacity:1;transform:none} }
@keyframes sb-fadeUp   { from{opacity:0;transform:translateY(12px)} to{opacity:1;transform:none} }
@keyframes sb-cardIn   { from{opacity:0;transform:translateY(16px) scale(.97)} to{opacity:1;transform:none} }
@keyframes sb-spin     { to{transform:rotate(360deg)} }
@keyframes sb-bBad     { 0%,100%{transform:translateX(0)} 15%{transform:translateX(-8px)} 30%{transform:translateX(8px)} 50%{transform:translateX(-5px)} 70%{transform:translateX(5px)} }
@keyframes sb-cGlow    { from{filter:drop-shadow(0 0 8px rgba(0,212,255,.4))} to{filter:drop-shadow(0 0 22px rgba(0,212,255,.9))} }
@keyframes sb-dPulse   { from{opacity:.3} to{opacity:1} }
@keyframes sb-bob      { 0%,100%{transform:translateY(0) rotate(-3deg)} 50%{transform:translateY(-8px) rotate(3deg)} }
@keyframes sb-btnIn    { from{transform:scale(.5) translateY(12px);opacity:0} to{transform:none;opacity:1} }
@keyframes sb-bOk      { 0%{transform:scale(1)} 35%{transform:scale(1.14) rotate(2deg)} 65%{transform:scale(.97) rotate(-1deg)} 100%{transform:scale(1)} }
@keyframes sb-bBadA    { 0%,100%{transform:translateX(0)} 15%{transform:translateX(-9px)} 30%{transform:translateX(9px)} 50%{transform:translateX(-6px)} 70%{transform:translateX(6px)} }
@keyframes sb-ip       { from{transform:scale(0);opacity:0} to{transform:none;opacity:1} }
@keyframes sb-sPop     { 0%{transform:scale(1)} 40%{transform:scale(1.4);color:var(--sb-gold)} 70%{transform:scale(.94)} 100%{transform:scale(1)} }
@keyframes sb-pFlash   { 0%,100%{transform:scale(1)} 50%{transform:scale(1.05)} }
@keyframes sb-fpA      { from{transform:translateX(-50%) translateY(0) scale(.6);opacity:1} to{transform:translateX(-50%) translateY(-80px) scale(1.2);opacity:0} }
@keyframes sb-qin      { from{transform:translateY(28px) scale(.9);opacity:0} to{transform:none;opacity:1} }
@keyframes sb-trophyB  { from{transform:scale(0) rotate(-20deg);opacity:0} to{transform:none;opacity:1} }
@keyframes sb-shim     { from{left:-60%} to{left:110%} }
@keyframes sb-fp       { from{background:rgba(120,200,255,.15)} to{background:rgba(120,200,255,.45)} }
@keyframes sb-urg      { from{filter:brightness(1)} to{filter:brightness(1.7) saturate(1.7)} }

/* ── Logo ──────────────────────────────────────── */
.sb-logo {
    font-family: var(--sb-fh);
    text-align: center;
    font-size: clamp(2.4rem,7vw,4.8rem);
    line-height: 1;
    background: linear-gradient(135deg, var(--sb-me), var(--sb-gold), var(--sb-op));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    filter: drop-shadow(0 0 20px rgba(0,212,255,.5));
    animation: sb-logoIn .8s cubic-bezier(.34,1.56,.64,1) both;
}
.sb-logo-sm { font-size: clamp(1.3rem,3.5vw,2rem); margin-bottom: 8px; }
.sb-subtitle { color: var(--sb-muted); font-size: clamp(.8rem,2vw,.95rem); text-align: center; margin-top: 7px; animation: sb-fadeUp .5s .3s both; }

/* ── Card ──────────────────────────────────────── */
.sb-card {
    background: rgba(255,255,255,.05);
    border: 1px solid rgba(255,255,255,.11);
    border-radius: 22px;
    padding: 24px 26px;
    width: 100%; max-width: 420px;
    display: flex; flex-direction: column; gap: 14px;
    animation: sb-cardIn .4s cubic-bezier(.34,1.56,.64,1) both;
}
.sb-lbl { font-size: .7rem; font-weight: 800; text-transform: uppercase; letter-spacing: .1em; color: var(--sb-muted); margin-bottom: 3px; }
.sb-inp {
    background: rgba(255,255,255,.07);
    border: 2px solid rgba(255,255,255,.13);
    border-radius: 12px; color: var(--sb-text);
    font-family: var(--sb-fb); font-size: 1rem; font-weight: 700;
    padding: 12px 14px; width: 100%; outline: none;
    transition: border-color .2s, box-shadow .2s;
}
.sb-inp:focus { border-color: var(--sb-me); box-shadow: 0 0 0 3px rgba(0,212,255,.18); }
.sb-code-inp { font-family: var(--sb-fh); letter-spacing: .22em; font-size: 1.5rem; text-transform: uppercase; text-align: center; }

/* ── Buttons ───────────────────────────────────── */
.sb-btn {
    font-family: var(--sb-fh); font-size: 1.05rem;
    padding: 12px 26px; border: none; border-radius: 50px;
    cursor: pointer; transition: transform .15s, opacity .2s;
}
.sb-btn:hover:not(:disabled) { transform: translateY(-2px) scale(1.04); }
.sb-btn:active:not(:disabled) { transform: scale(.97); }
.sb-btn:disabled { opacity: .4; cursor: not-allowed; }
.sb-btn-blue   { background: linear-gradient(135deg,var(--sb-me),#4e7dff); color: #fff; box-shadow: 0 0 22px rgba(0,212,255,.35); }
.sb-btn-orange { background: linear-gradient(135deg,var(--sb-op),#ff9500); color: #fff; box-shadow: 0 0 22px rgba(255,94,58,.35); }
.sb-btn-ghost  { background: rgba(255,255,255,.08); border: 2px solid rgba(255,255,255,.18); color: var(--sb-text); }
.sb-btn-gold   { background: linear-gradient(135deg,var(--sb-gold),#ff9800); color: #1a0800; box-shadow: 0 0 24px rgba(255,215,0,.35); font-size: 1.3rem; padding: 16px 40px; }
.sb-full { width: 100%; }

/* ── Home screen ───────────────────────────────── */
#sb-homeScreen { gap: 24px; }
.sb-home-btns { display: flex; flex-direction: column; gap: 12px; width: 100%; max-width: 310px; animation: sb-fadeUp .6s .4s both; }
.sb-home-btns .sb-btn { width: 100%; font-size: 1.2rem; padding: 17px; }
.sb-home-note { font-size: .78rem; color: var(--sb-muted); text-align: center; line-height: 1.7; animation: sb-fadeUp .6s .6s both; }

/* ── Host screen ───────────────────────────────── */
.sb-code-box { background: rgba(0,212,255,.07); border: 2px solid rgba(0,212,255,.3); border-radius: 18px; padding: 16px 20px; text-align: center; }
.sb-code-val { font-family: var(--sb-fh); font-size: clamp(2.5rem,8vw,4rem); letter-spacing: .25em; color: var(--sb-me); animation: sb-cGlow 2s ease-in-out infinite alternate; }
.sb-code-hint { font-size: .72rem; color: var(--sb-muted); margin-top: 6px; }
.sb-share-row { display: flex; gap: 8px; }
.sb-share-row .sb-btn { flex: 1; font-size: .82rem; padding: 9px; }
.sb-status-row { display: flex; align-items: center; gap: 10px; background: rgba(255,255,255,.05); border: 1px solid rgba(255,255,255,.1); border-radius: 50px; padding: 9px 16px; font-size: .85rem; }
.sb-dot { width: 10px; height: 10px; border-radius: 50%; background: var(--sb-muted); flex-shrink: 0; transition: background .3s; }
.sb-dot-wait { background: var(--sb-gold); animation: sb-dPulse 1s ease-in-out infinite alternate; }
.sb-dot-ok   { background: var(--sb-green); }
.sb-dot-err  { background: var(--sb-red); }
.sb-spinner-row { display: flex; align-items: center; gap: 10px; justify-content: center; }
.sb-spinner { width: 26px; height: 26px; border: 3px solid rgba(255,255,255,.1); border-top-color: var(--sb-me); border-radius: 50%; animation: sb-spin .8s linear infinite; flex-shrink: 0; }

/* ── Game screen ───────────────────────────────── */
#sb-gameScreen { padding: 8px; gap: 7px; overflow: hidden; justify-content: flex-start; }

.sb-top-bar { display: flex; align-items: stretch; gap: 8px; flex-shrink: 0; }
.sb-sp { flex: 1; border-radius: var(--sb-r); padding: 9px 13px; display: flex; flex-direction: column; align-items: center; position: relative; overflow: hidden; }
.sb-sp::before { content: ''; position: absolute; inset: 0; border-radius: var(--sb-r); opacity: 0; transition: opacity .5s; pointer-events: none; }
.sb-sp-me { background: linear-gradient(160deg,var(--sb-me-bg),#00101f); border: 2px solid var(--sb-me); box-shadow: 0 0 14px rgba(0,212,255,.2); }
.sb-sp-op { background: linear-gradient(160deg,var(--sb-op-bg),#1c0600); border: 2px solid var(--sb-op); box-shadow: 0 0 14px rgba(255,94,58,.2); }
.sb-sp-me::before { background: radial-gradient(circle at 50% 50%,rgba(0,212,255,.3),transparent 70%); }
.sb-sp-op::before { background: radial-gradient(circle at 50% 50%,rgba(255,94,58,.3),transparent 70%); }
.sb-sp.sb-glow::before { opacity: 1; }
.sb-sp-name { font-family: var(--sb-fh); font-size: clamp(.75rem,2.2vw,1.1rem); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 140px; }
.sb-sp-me .sb-sp-name { color: var(--sb-me); }
.sb-sp-op .sb-sp-name { color: var(--sb-op); }
.sb-sp-you  { font-size: .55rem; text-transform: uppercase; letter-spacing: .1em; color: rgba(0,212,255,.55); }
.sb-sp-score { font-family: var(--sb-fh); font-size: clamp(1.7rem,4.5vw,2.7rem); line-height: 1; }
.sb-sp-streak { font-size: .68rem; color: var(--sb-gold); min-height: 14px; }

/* freeze overlay */
.sb-fz { position: absolute; inset: 0; border-radius: var(--sb-r); background: rgba(120,200,255,.25); display: flex; align-items: center; justify-content: center; font-size: 2rem; opacity: 0; pointer-events: none; transition: opacity .25s; z-index: 5; }
.sb-fz.on { opacity: 1; animation: sb-fp .6s ease-in-out infinite alternate; }

/* round info */
.sb-ri { flex: 0 0 auto; min-width: 88px; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 2px; }
.sb-ri-lbl { font-size: .58rem; text-transform: uppercase; letter-spacing: .1em; color: var(--sb-muted); }
.sb-ri-num { font-family: var(--sb-fh); font-size: clamp(.9rem,2.7vw,1.45rem); color: var(--sb-gold); }

/* timer bar */
.sb-tw { flex-shrink: 0; height: 11px; background: rgba(255,255,255,.08); border-radius: 50px; overflow: hidden; }
.sb-tf { height: 100%; border-radius: 50px; width: 100%; transform-origin: left; background: linear-gradient(90deg,var(--sb-green),var(--sb-gold),var(--sb-red)); transition: transform .1s linear; position: relative; }
.sb-tf::after { content: ''; position: absolute; top: 0; left: -60%; width: 50%; height: 100%; background: linear-gradient(90deg,transparent,rgba(255,255,255,.4),transparent); animation: sb-shim 2s linear infinite; }
.sb-tf.sb-urg { animation: sb-urg .35s ease-in-out infinite alternate; }

/* question panel */
.sb-qp { flex: 1; min-height: 0; background: rgba(255,255,255,.03); border: 1px solid rgba(255,255,255,.09); border-radius: var(--sb-r); display: flex; flex-direction: column; align-items: center; justify-content: center; padding: 12px 18px; text-align: center; gap: 7px; overflow: hidden; }
.sb-qtopic { font-size: .63rem; text-transform: uppercase; letter-spacing: .1em; color: var(--sb-muted); background: rgba(255,255,255,.07); border-radius: 50px; padding: 2px 12px; }
.sb-qimg-wrap { width: 100%; max-height: 120px; overflow: hidden; border-radius: 10px; }
.sb-qimg { width: 100%; height: 120px; object-fit: cover; border-radius: 10px; }
.sb-qemoji { font-size: clamp(1.9rem,5.5vw,3.4rem); display: inline-block; animation: sb-bob 3s ease-in-out infinite; }
.sb-qtext { font-family: var(--sb-fh); font-size: clamp(.92rem,3vw,1.8rem); line-height: 1.3; max-width: 680px; }
.sb-q-enter { animation: sb-qin .45s cubic-bezier(.34,1.56,.64,1) both; }
.sb-opp-row { display: flex; align-items: center; gap: 8px; font-size: .75rem; color: var(--sb-muted); min-height: 20px; }
.sb-od { width: 7px; height: 7px; border-radius: 50%; background: var(--sb-muted); flex-shrink: 0; transition: background .25s; }
.sb-od.sb-ans { background: var(--sb-green); }
.sb-od.sb-bad { background: var(--sb-red); }

/* feedback */
.sb-fb-row { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; min-height: 26px; flex-shrink: 0; }
.sb-fbb { font-size: .78rem; font-weight: 700; padding: 3px 13px; border-radius: 50px; display: none; animation: sb-ip .3s cubic-bezier(.34,1.56,.64,1); }
.sb-fbb.show { display: inline-block; }
.sb-fbb.ok  { background: rgba(0,230,118,.2); color: var(--sb-green); border: 1px solid var(--sb-green); }
.sb-fbb.bad { background: rgba(255,23,68,.2);  color: var(--sb-red);   border: 1px solid var(--sb-red); }

/* answer buttons */
.sb-agrid { display: grid; grid-template-columns: 1fr 1fr; gap: 7px; flex-shrink: 0; }
.sb-ab {
    border-radius: 14px; border: 2px solid rgba(255,255,255,.12); background: rgba(255,255,255,.07);
    color: var(--sb-text); font-family: var(--sb-fb); font-size: clamp(.7rem,1.8vw,.93rem); font-weight: 700;
    padding: 13px 9px; cursor: pointer;
    display: flex; align-items: center; justify-content: center; flex-direction: column;
    text-align: center; gap: 4px;
    transition: background .12s, transform .12s, border-color .12s, box-shadow .12s;
    position: relative; overflow: hidden; line-height: 1.3;
    animation: sb-btnIn .4s cubic-bezier(.34,1.56,.64,1) both;
}
.sb-ab:nth-child(1){animation-delay:.05s}.sb-ab:nth-child(2){animation-delay:.10s}.sb-ab:nth-child(3){animation-delay:.15s}.sb-ab:nth-child(4){animation-delay:.20s}
.sb-ab:hover:not(:disabled) { background: rgba(255,255,255,.15); transform: translateY(-4px) scale(1.04); box-shadow: 0 8px 20px rgba(0,0,0,.4); }
.sb-ab:disabled { opacity: .45; cursor: not-allowed; transform: none !important; }
.sb-kb { font-family: var(--sb-fh); font-size: 1.05rem; width: 28px; height: 28px; border-radius: 8px; display: flex; align-items: center; justify-content: center; background: rgba(0,212,255,.18); color: var(--sb-me); border: 1px solid rgba(0,212,255,.4); flex-shrink: 0; }
.sb-at { font-size: clamp(.67rem,1.7vw,.9rem); line-height: 1.3; }
.sb-ab.ok  { background: rgba(0,230,118,.25) !important; border-color: var(--sb-green) !important; box-shadow: 0 0 20px rgba(0,230,118,.55) !important; animation: sb-bOk .55s cubic-bezier(.34,1.56,.64,1) both !important; }
.sb-ab.bad { background: rgba(255,23,68,.25) !important;  border-color: var(--sb-red) !important;   animation: sb-bBadA .5s ease both !important; }
.sb-ab.rv  { background: rgba(0,230,118,.12) !important; border-color: var(--sb-green) !important; box-shadow: 0 0 10px rgba(0,230,118,.3) !important; }

/* floating points */
.sb-fpts { position: absolute; font-family: var(--sb-fh); font-size: clamp(1.3rem,4vw,2rem); pointer-events: none; z-index: 500; text-shadow: 0 2px 8px rgba(0,0,0,.5); animation: sb-fpA .9s ease-out both; }

/* toast */
.sb-pu-toast { position: absolute; top: 50%; left: 50%; transform: translate(-50%,-50%) scale(0); background: linear-gradient(135deg,var(--sb-gold),#ff9800); color: #1a0800; font-family: var(--sb-fh); font-size: clamp(1rem,3.5vw,1.7rem); padding: 13px 30px; border-radius: 50px; z-index: 400; pointer-events: none; box-shadow: 0 0 50px rgba(255,215,0,.6); text-align: center; opacity: 0; transition: transform .35s cubic-bezier(.34,1.56,.64,1), opacity .35s; }
.sb-pu-toast.show { transform: translate(-50%,-55%) scale(1); opacity: 1; }

/* round overlay */
.sb-rndov { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; z-index: 100; pointer-events: none; background: rgba(7,7,26,.92); opacity: 0; transition: opacity .3s; }
.sb-rndov.show { opacity: 1; }
.sb-rndlbl { font-family: var(--sb-fh); font-size: clamp(2rem,9vw,5rem); color: var(--sb-gold); filter: drop-shadow(0 0 28px rgba(255,224,64,.6)); transform: scale(0); transition: transform .4s cubic-bezier(.34,1.56,.64,1); text-align: center; }
.sb-rndov.show .sb-rndlbl { transform: scale(1); }

/* disconnect */
.sb-disc-bar { position: absolute; top: 0; left: 0; right: 0; background: var(--sb-red); color: #fff; font-family: var(--sb-fh); font-size: .95rem; text-align: center; padding: 9px; z-index: 600; display: none; }
.sb-disc-bar.show { display: block; }

/* mute button */
.sb-mute-btn { position: absolute; bottom: 14px; right: 14px; background: rgba(255,255,255,.08); border: 1px solid rgba(255,255,255,.18); border-radius: 50%; width: 44px; height: 44px; font-size: 1.2rem; cursor: pointer; display: flex; align-items: center; justify-content: center; z-index: 300; }

/* end screen */
.sb-end-screen { gap: 20px; background: radial-gradient(ellipse at 50% 0%,#1a1260 0%,#07071a 65%); }
.sb-end-trophy { font-size: clamp(3rem,12vw,7rem); display: inline-block; animation: sb-trophyB 1s cubic-bezier(.34,1.56,.64,1) both; }
.sb-end-title  { font-family: var(--sb-fh); font-size: clamp(1.8rem,7vw,3.8rem); background: linear-gradient(135deg,var(--sb-gold),#fff176); -webkit-background-clip: text; -webkit-text-fill-color: transparent; text-align: center; animation: sb-fadeUp .5s .3s both; }
.sb-final-scores { display: flex; gap: 16px; flex-wrap: wrap; justify-content: center; animation: sb-fadeUp .5s .5s both; }
.sb-fbox { border-radius: 20px; padding: 18px 30px; text-align: center; display: flex; flex-direction: column; gap: 5px; }
.sb-fbox-me { background: linear-gradient(160deg,var(--sb-me-bg),#001930); border: 2px solid var(--sb-me); }
.sb-fbox-op { background: linear-gradient(160deg,var(--sb-op-bg),#1c0600); border: 2px solid var(--sb-op); }
.sb-fn { font-family: var(--sb-fh); font-size: 1.2rem; }
.sb-fbox-me .sb-fn { color: var(--sb-me); }
.sb-fbox-op .sb-fn { color: var(--sb-op); }
.sb-fs { font-family: var(--sb-fh); font-size: 3rem; line-height: 1; }
.sb-fl { font-size: .75rem; color: var(--sb-muted); }
.sb-fbox.sb-winner { box-shadow: 0 0 34px rgba(255,215,0,.45); }
.sb-fbox.sb-winner .sb-fs { color: var(--sb-gold); }
.sb-end-btns { display: flex; gap: 12px; flex-wrap: wrap; justify-content: center; animation: sb-fadeUp .5s .7s both; }

/* confetti canvas */
#sb-confettiCanvas { position: absolute; inset: 0; pointer-events: none; z-index: 999; }

@media (max-width: 480px) { .sb-card { padding: 18px; } .sb-code-val { font-size: 2.2rem; } }
@media (max-height: 580px) { .sb-qemoji { font-size: 1.5rem; } .sb-qtext { font-size: .92rem; } .sb-ab { padding: 9px 7px; } }