@import "https://fonts.googleapis.com/css2?family=Baloo+2:wght@500;700;800&display=swap";
:root{--bg:#0f1c33;--bg2:#1b2a4a;--card:#243a63;--card2:#2d4577;--ink:#f4f8ff;--muted:#a9bbdc;--accent:#ffd33d;--accent2:#ff8a3d;--green:#3ddc84;--red:#ff5d6c;--blue:#4d9fff;--shadow:0 8px 24px #00000059;--radius:18px}*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}html,body{min-height:100%;margin:0;padding:0}body{background:radial-gradient(1200px 800px at 50% -10%, var(--bg2), var(--bg));color:var(--ink);-webkit-font-smoothing:antialiased;background-attachment:fixed;font-family:"Baloo 2",Nunito,system-ui,-apple-system,Segoe UI,Roboto,sans-serif}a{color:inherit}#app,.app{max-width:640px;margin:0 auto;padding:20px 16px 48px}.screen{animation:.35s fade}@keyframes fade{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}.topbar{justify-content:space-between;align-items:center;margin-bottom:8px;display:flex}.topbar .who{align-items:center;gap:10px;font-weight:700;display:flex}.topbar .who .hi{color:var(--muted);font-size:15px}.hero{text-align:center;margin:18px 0 24px}.globe{font-size:64px;animation:12s linear infinite spin;display:inline-block}@keyframes spin{to{transform:rotate(360deg)}}.hero h1{letter-spacing:.5px;background:linear-gradient(90deg, var(--accent), var(--accent2));-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text;margin:6px 0 2px;font-size:44px;font-weight:800}.tagline{color:var(--muted);margin:0;font-size:17px}.card{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);margin-bottom:20px;padding:20px}.card h2{margin:0 0 14px;font-size:22px}.card h3{margin:0 0 8px;font-size:19px}.btn{cursor:pointer;color:#16233f;border:none;border-radius:12px;font-family:inherit;font-weight:800;transition:transform 80ms,filter .15s,opacity .15s}.btn:active{transform:scale(.96)}.btn-primary{background:linear-gradient(180deg, var(--accent), var(--accent2));color:#2a1a00}.btn-primary:hover{filter:brightness(1.05)}.btn-big{width:100%;margin-top:4px;padding:16px;font-size:22px}.btn-big:disabled{opacity:.4;cursor:not-allowed;filter:grayscale(.4)}.btn-ghost{color:var(--ink);background:#ffffff1a;padding:12px 18px;font-size:16px}.btn-ghost:hover{background:#ffffff2e}.btn-small{padding:8px 12px;font-size:14px}.btn-google{color:#1f2937;background:#fff;justify-content:center;align-items:center;gap:10px;width:100%;margin-top:4px;padding:15px;font-size:19px;display:inline-flex}.btn-google svg{width:20px;height:20px}.hint{color:var(--muted);text-align:center;min-height:18px;margin:12px 0 0;font-size:14px}.text-link{color:var(--muted);cursor:pointer;text-underline-offset:3px;background:0 0;border:none;margin:18px auto 0;font-family:inherit;font-size:15px;font-weight:700;text-decoration:underline;display:block}.text-link:hover{color:var(--ink)}.avatar-img{object-fit:cover;border-radius:50%;width:30px;height:30px}.quiz-top{align-items:center;gap:12px;margin-bottom:18px;display:flex}.progress-wrap{flex:1}.progress-text{color:var(--muted);text-align:center;margin-bottom:4px;font-size:13px;font-weight:700}.progress-bar{background:var(--card);border-radius:99px;height:8px;overflow:hidden}.progress-fill{background:var(--blue);border-radius:99px;height:100%;transition:width .3s}.score-chip{background:var(--card);white-space:nowrap;border-radius:99px;padding:8px 14px;font-size:16px;font-weight:800}.timer-wrap{background:var(--card);border-radius:99px;height:10px;margin-bottom:8px;position:relative;overflow:hidden}.timer-bar{background:linear-gradient(90deg, var(--green), var(--accent));border-radius:99px;width:100%;height:100%}.timer-bar.low{background:linear-gradient(90deg, var(--accent2), var(--red))}.timer-num{font-size:20px;font-weight:800;position:absolute;top:-28px;right:10px}.flag-stage{place-items:center;margin:18px 0 22px;display:grid}.flag-img{aspect-ratio:3/2;object-fit:contain;width:100%;max-width:360px;box-shadow:var(--shadow);background:#0b1220;border:3px solid #ffffff1f;border-radius:14px}.choices{grid-template-columns:1fr 1fr;gap:12px;display:grid}.choice{background:var(--card);color:var(--ink);cursor:pointer;text-align:center;border:2px solid #0000;border-radius:14px;place-items:center;min-height:60px;padding:16px 12px;font-family:inherit;font-size:16px;font-weight:700;transition:transform 80ms,background .15s,border-color .15s;display:grid}.choice:hover:not(:disabled){background:var(--card2);transform:translateY(-2px)}.choice:active{transform:scale(.97)}.choice:disabled{cursor:default}.choice.correct{background:var(--green);color:#07351c;border-color:#2fce74;animation:.3s pop}.choice.wrong{background:var(--red);color:#4a0008;border-color:#ff3d50}.choice.dim{opacity:.45}@keyframes pop{50%{transform:scale(1.06)}}.feedback{text-align:center;min-height:30px;margin-top:16px;font-size:20px;font-weight:800}.feedback.good{color:var(--green)}.feedback.bad{color:var(--red)}.results-card{text-align:center}.results-card h2{font-size:28px}.big-score{color:var(--accent);margin:8px 0;font-size:56px;font-weight:800;line-height:1}.big-score .of{color:var(--muted);margin-left:6px;font-size:26px}.results-stars{letter-spacing:4px;min-height:36px;margin-bottom:14px;font-size:30px}.streak-row{justify-content:center;gap:14px;margin:6px 0 20px;display:flex}.stat{background:var(--card2);border-radius:14px;min-width:120px;padding:14px 22px}.stat-num{font-size:30px;font-weight:800}.stat-label{color:var(--muted);font-size:13px}.round-review{grid-template-columns:repeat(auto-fill,minmax(46px,1fr));gap:8px;margin:6px 0 20px;display:grid}.review-item{position:relative}.review-item img{aspect-ratio:3/2;object-fit:contain;background:#0b1220;border-radius:6px;width:100%;display:block}.review-item .mark{background:var(--bg);border-radius:50%;place-items:center;width:20px;height:20px;font-size:14px;display:grid;position:absolute;top:-6px;right:-4px;box-shadow:0 2px 5px #0006}.results-actions{flex-wrap:wrap;justify-content:center;gap:12px;display:flex}.results-actions .btn{padding:14px 22px;font-size:17px}.mastery-bar{background:var(--bg2);border-radius:99px;height:14px;margin:10px 0 16px;overflow:hidden}.mastery-fill{background:linear-gradient(90deg, var(--green), var(--blue));height:100%;transition:width .6s}.learned-details{margin-top:10px}.learned-details summary{cursor:pointer;color:var(--accent);padding:8px 0;font-size:15px;font-weight:700}.flag-grid{grid-template-columns:repeat(auto-fill,minmax(54px,1fr));gap:8px;padding:10px 0;display:grid}.flag-grid .gflag{text-align:center}.flag-grid .gflag img{aspect-ratio:3/2;object-fit:contain;background:#0b1220;border-radius:5px;width:100%;display:block}.flag-grid .gflag span{color:var(--muted);margin-top:2px;font-size:10px;line-height:1.1;display:block}.teacher-top{align-items:center;gap:12px;margin:6px 0 18px;display:flex}.teacher-top h2{margin:0;font-size:24px}.class-summary{text-align:center;gap:12px;padding:18px;display:flex}.csum{flex:1}.csum-num{color:var(--accent);font-size:30px;font-weight:800;line-height:1}.csum-label{color:var(--muted);margin-top:4px;font-size:12px}.student-card{background:var(--card);box-shadow:var(--shadow);border-radius:14px;margin-bottom:12px;overflow:hidden}.student-card>summary{cursor:pointer;align-items:center;gap:12px;padding:14px 16px;list-style:none;display:flex}.student-card>summary::-webkit-details-marker{display:none}.student-card>summary:hover{background:var(--card2)}.s-avatar{color:#16233f;object-fit:cover;border-radius:50%;flex:none;place-items:center;width:38px;height:38px;font-size:18px;font-weight:800;display:grid}.s-main{flex-direction:column;flex:1;gap:2px;min-width:0;display:flex}.s-name{font-size:18px;font-weight:800}.s-sub{color:var(--muted);font-size:13px}.s-pct{color:var(--green);flex:none;font-size:22px;font-weight:800}.s-body{padding:0 16px 16px}.student-card .mastery-bar{height:12px;margin:4px 0 14px}.s-stats{grid-template-columns:repeat(4,1fr);gap:8px;margin-bottom:8px;display:grid}.s-stat{background:var(--card2);text-align:center;border-radius:10px;padding:10px 6px}.s-stat-num{font-size:18px;font-weight:800}.s-stat-label{color:var(--muted);margin-top:2px;font-size:11px}.gate{max-width:420px;margin:60px auto 0}.gate input{background:var(--bg2);width:100%;color:var(--ink);border:2px solid #3a5288;border-radius:12px;outline:none;margin-bottom:12px;padding:12px 14px;font-family:inherit;font-size:16px}.gate input:focus{border-color:var(--blue)}.gate .err{color:var(--red);min-height:18px;margin:4px 0 0;font-size:14px;font-weight:700}.center-screen{text-align:center;place-items:center;min-height:70vh;display:grid}@media (max-width:420px){.s-stats{grid-template-columns:repeat(2,1fr)}}@media (max-width:380px){.choices{gap:8px}.choice{padding:13px 8px;font-size:14px}.hero h1{font-size:38px}}