:root{--bg-0: #070b18;--bg-1: #0d1530;--card: rgba(20, 28, 56, .72);--card-border: rgba(120, 150, 255, .22);--text: #eaf0ff;--muted: #9aa7d4;--accent: #6c8cff;--accent-2: #36e2c5;--good: #2fe08a;--bad: #ff6b81;--warn: #ffd166;--radius: 22px;--shadow: 0 24px 60px rgba(0, 0, 0, .45)}*{box-sizing:border-box;margin:0;padding:0}html,body,#root{height:100%}body{font-family:Segoe UI,system-ui,-apple-system,Helvetica Neue,sans-serif;color:var(--text);background:radial-gradient(1200px 800px at 15% -10%,#1b2b66 0%,transparent 55%),radial-gradient(1000px 700px at 110% 10%,#163b52 0%,transparent 50%),linear-gradient(160deg,var(--bg-1),var(--bg-0));background-attachment:fixed;min-height:100%;-webkit-font-smoothing:antialiased}.app{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:24px 16px;position:relative;overflow:hidden}.bg-orbs{position:fixed;top:0;right:0;bottom:0;left:0;z-index:0;pointer-events:none}.orb{position:absolute;border-radius:50%;filter:blur(70px);opacity:.5;animation:float 14s ease-in-out infinite}.orb-1{width:340px;height:340px;background:#4a63ff;top:-80px;left:-60px}.orb-2{width:300px;height:300px;background:#18c8b0;bottom:-90px;right:-50px;animation-delay:-4s}.orb-3{width:220px;height:220px;background:#8b5cf6;top:40%;right:20%;animation-delay:-8s}@keyframes float{0%,to{transform:translateY(0) translate(0)}50%{transform:translateY(-26px) translate(18px)}}.card{position:relative;z-index:1;width:100%;max-width:560px;background:var(--card);border:1px solid var(--card-border);border-radius:var(--radius);box-shadow:var(--shadow);-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);padding:34px 30px}.fade-in{animation:fadeUp .45s ease}@keyframes fadeUp{0%{opacity:0;transform:translateY(16px)}to{opacity:1;transform:translateY(0)}}.badge-top{display:inline-block;font-size:.8rem;font-weight:700;letter-spacing:2px;color:var(--accent-2);background:#36e2c51f;border:1px solid rgba(54,226,197,.3);padding:6px 14px;border-radius:999px;margin-bottom:18px}.title{font-size:clamp(1.7rem,5vw,2.5rem);line-height:1.1;font-weight:800;letter-spacing:-.5px}.title-x{background:linear-gradient(90deg,var(--accent),var(--accent-2));-webkit-background-clip:text;background-clip:text;color:transparent}.lead{margin-top:14px;font-size:1.1rem;color:var(--muted);line-height:1.6}.lead strong{color:var(--text)}.dedication{display:flex;flex-direction:column;align-items:center;gap:6px;text-align:center;margin-top:22px;padding:16px 18px;border-radius:16px;background:linear-gradient(160deg,#8b5cf629,#36e2c514);border:1px solid rgba(139,92,246,.32);box-shadow:0 0 0 1px #8b5cf614 inset}.ded-label{font-size:.78rem;letter-spacing:2px;text-transform:uppercase;color:var(--accent-2);font-weight:700}.ded-names{font-size:clamp(1.15rem,4.5vw,1.5rem);font-weight:800;background:linear-gradient(90deg,#c4b5fd,var(--accent-2));-webkit-background-clip:text;background-clip:text;color:transparent}.ded-note{font-size:.92rem;color:var(--muted)}.section-label{margin:26px 0 14px;font-size:.95rem;text-transform:uppercase;letter-spacing:1.5px;color:var(--muted);font-weight:700}.title.small{font-size:clamp(1.4rem,4.5vw,1.9rem)}.lead.sub{font-size:.98rem;margin-top:8px}.level-grid{display:flex;flex-direction:column;gap:12px}.level-btn{display:flex;align-items:center;gap:16px;text-align:left;padding:16px 18px;border-radius:16px;border:1px solid var(--card-border);background:linear-gradient(120deg,#6c8cff1f,#8b5cf60f);color:var(--text);cursor:pointer;transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease}.level-btn:hover{transform:translate(5px);border-color:var(--accent);box-shadow:0 12px 28px #4c63ff42}.level-emoji{font-size:2.2rem;flex-shrink:0;width:54px;height:54px;display:flex;align-items:center;justify-content:center;border-radius:14px;background:#ffffff0f;border:1px solid var(--card-border)}.level-info{display:flex;flex-direction:column;gap:2px;flex:1}.level-tag{font-size:.72rem;letter-spacing:1.5px;color:var(--accent-2);font-weight:700;text-transform:uppercase}.level-name{font-size:1.25rem;font-weight:800}.level-desc{font-size:.85rem;color:var(--muted);line-height:1.4}.level-arrow{font-size:1.4rem;color:var(--accent);font-weight:800}.level-pill{font-size:.82rem;font-weight:700;color:var(--accent-2);background:#36e2c51f;border:1px solid rgba(54,226,197,.3);padding:5px 12px;border-radius:999px;white-space:nowrap}.mode-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}.mode-btn{display:flex;flex-direction:column;gap:4px;text-align:left;padding:18px;border-radius:16px;border:1px solid var(--card-border);background:linear-gradient(160deg,#6c8cff1f,#36e2c50f);color:var(--text);cursor:pointer;transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease}.mode-btn:hover{transform:translateY(-4px);border-color:var(--accent);box-shadow:0 14px 30px #4c63ff47}.mode-emoji{font-size:1.8rem}.mode-name{font-size:.78rem;letter-spacing:1px;color:var(--accent-2);font-weight:700}.mode-title{font-size:1.2rem;font-weight:800}.mode-sub{font-size:.82rem;color:var(--muted);line-height:1.4}.mode-count{margin-top:6px;font-size:.75rem;color:var(--text);background:#ffffff14;padding:3px 10px;border-radius:999px;align-self:flex-start}.rank-strip{display:flex;flex-wrap:wrap;gap:8px;margin-top:24px;justify-content:center}.rank-chip{font-size:.8rem;color:var(--muted);border:1px solid var(--card-border);padding:5px 12px;border-radius:999px}.play-header{display:flex;align-items:center;justify-content:space-between;gap:8px;margin-bottom:18px}.mode-tag{font-weight:700;font-size:.95rem}.rank-badge{font-size:.82rem;font-weight:700;color:var(--warn);background:#ffd1661f;border:1px solid rgba(255,209,102,.3);padding:5px 12px;border-radius:999px}.stats-row{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-bottom:14px}.stat{display:flex;flex-direction:column;align-items:center;padding:12px;background:#ffffff0d;border-radius:14px;border:1px solid var(--card-border)}.stat-label{font-size:.72rem;color:var(--muted);text-transform:uppercase;letter-spacing:1px}.stat-value{font-size:1.25rem;font-weight:800;margin-top:2px}.progress-track{height:12px;border-radius:999px;background:#ffffff14;overflow:hidden;margin-bottom:22px}.progress-track.end{margin:18px 0}.progress-fill{height:100%;border-radius:999px;background:linear-gradient(90deg,var(--accent),var(--accent-2));transition:width .5s cubic-bezier(.22,1,.36,1)}.equation-box{display:flex;flex-direction:column;align-items:center;gap:6px;padding:26px 18px;border-radius:18px;background:linear-gradient(160deg,#6c8cff24,#36e2c514);border:1px solid var(--card-border);margin-bottom:20px;transition:border-color .25s ease,box-shadow .25s ease}.equation-box.correct{border-color:var(--good);box-shadow:0 0 0 3px #2fe08a2e}.equation-box.wrong{border-color:var(--bad)}.eq-prompt{font-size:.85rem;color:var(--muted);letter-spacing:1px;text-transform:uppercase}.equation{font-size:clamp(2rem,8vw,3rem);font-weight:800;letter-spacing:1px;font-variant-numeric:tabular-nums}.answer-row{display:flex;align-items:center;gap:14px;margin-bottom:16px}.x-label{font-size:1.8rem;font-weight:800;color:var(--accent-2)}.answer-input{flex:1;font-size:1.8rem;font-weight:700;text-align:center;padding:14px;border-radius:14px;border:2px solid var(--card-border);background:#00000040;color:var(--text);outline:none;transition:border-color .18s ease,box-shadow .18s ease}.answer-input:focus{border-color:var(--accent);box-shadow:0 0 0 4px #6c8cff38}.answer-input:disabled{opacity:.7}.answer-input::-webkit-outer-spin-button,.answer-input::-webkit-inner-spin-button{-webkit-appearance:none;margin:0}.answer-input[type=number]{-moz-appearance:textfield}.feedback{padding:14px 16px;border-radius:14px;font-size:1.05rem;margin-bottom:14px;text-align:center}.feedback.correct{background:#2fe08a24;border:1px solid rgba(47,224,138,.4);color:#b6ffd9}.feedback.wrong{background:#ff6b811f;border:1px solid rgba(255,107,129,.4);color:#ffd0d8}.hint-box{padding:14px 16px;border-radius:14px;background:#ffd1661a;border:1px solid rgba(255,209,102,.32);color:#ffe6a8;font-size:1rem;line-height:1.5;margin-bottom:16px}.action-row{display:flex;gap:12px;flex-wrap:wrap}.primary-btn{flex:1;min-width:180px;font-size:1.15rem;font-weight:800;padding:16px 22px;border:none;border-radius:16px;cursor:pointer;color:#06122a;background:linear-gradient(90deg,var(--accent),var(--accent-2));box-shadow:0 12px 26px #4c63ff59;transition:transform .16s ease,box-shadow .16s ease,filter .16s ease}.primary-btn:hover{transform:translateY(-3px);filter:brightness(1.06)}.primary-btn:active{transform:translateY(0)}.ghost-btn{font-size:.95rem;font-weight:700;padding:10px 16px;border-radius:14px;cursor:pointer;color:var(--text);background:#ffffff0f;border:1px solid var(--card-border);transition:background .16s ease,transform .16s ease}.ghost-btn:hover{background:#ffffff1f;transform:translateY(-2px)}.ghost-btn.big{font-size:1.1rem;padding:16px 22px}.sound-toggle{position:fixed;top:16px;right:16px;z-index:5;width:46px;height:46px;font-size:1.3rem;border-radius:50%;cursor:pointer;border:1px solid var(--card-border);background:var(--card);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);transition:transform .16s ease}.sound-toggle:hover{transform:scale(1.08)}.end-card{text-align:center}.trophy{font-size:4.5rem;animation:bounce 1.2s ease infinite}@keyframes bounce{0%,to{transform:translateY(0)}50%{transform:translateY(-12px)}}.end-mode{color:var(--muted);margin-top:6px;font-weight:600}.end-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:22px}.end-stat{display:flex;flex-direction:column;align-items:center;gap:4px;padding:16px 8px;border-radius:14px;background:#ffffff0d;border:1px solid var(--card-border)}.big-num{font-size:1.5rem;font-weight:800}.end-label{font-size:.75rem;color:var(--muted);text-transform:uppercase;letter-spacing:1px}.motivation{margin:6px 0 22px;font-size:1.15rem;font-weight:600;line-height:1.5}.pop{animation:pop .4s cubic-bezier(.18,1.4,.4,1)}@keyframes pop{0%{transform:scale(.85);opacity:0}to{transform:scale(1);opacity:1}}.shake{animation:shake .4s ease}@keyframes shake{0%,to{transform:translate(0)}20%{transform:translate(-8px)}40%{transform:translate(8px)}60%{transform:translate(-5px)}80%{transform:translate(5px)}}.name-field{display:flex;flex-direction:column;gap:8px;margin-top:22px}.name-field label{font-size:.95rem;font-weight:700;letter-spacing:.5px;color:var(--text)}.name-input{font-size:1.15rem;font-weight:600;padding:14px 16px;border-radius:14px;border:2px solid var(--card-border);background:#00000040;color:var(--text);outline:none;transition:border-color .18s ease,box-shadow .18s ease}.name-input::placeholder{color:var(--muted)}.name-input:focus{border-color:var(--accent);box-shadow:0 0 0 4px #6c8cff38}.name-hint{font-size:.9rem;color:var(--warn);margin-bottom:12px}.level-btn:disabled{opacity:.45;cursor:not-allowed;filter:grayscale(.4)}.level-btn:disabled:hover{transform:none;box-shadow:none;border-color:var(--card-border)}.leaderboard{margin-top:26px}.lb-head{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:12px}.lb-title{margin-bottom:0}.lb-source{font-size:.72rem;font-weight:700;padding:4px 10px;border-radius:999px;white-space:nowrap}.lb-source.api{color:var(--accent-2);background:#36e2c51f;border:1px solid rgba(54,226,197,.3)}.lb-source.local{color:var(--muted);background:#ffffff0f;border:1px solid var(--card-border)}.lb-empty{text-align:center;color:var(--muted);padding:18px;border:1px dashed var(--card-border);border-radius:14px;font-size:.95rem}.lb-list{list-style:none;display:flex;flex-direction:column;gap:8px;padding:0;margin:0}.lb-row{display:grid;grid-template-columns:38px 1fr auto auto auto;align-items:center;gap:10px;padding:11px 14px;border-radius:13px;background:#ffffff0d;border:1px solid var(--card-border)}.lb-row.me{border-color:var(--accent-2);background:linear-gradient(160deg,#36e2c529,#6c8cff1a);box-shadow:0 0 0 2px #36e2c538}.lb-rank{font-size:1.2rem;font-weight:800;text-align:center}.lb-name{font-weight:700;font-size:1.02rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.lb-level{font-size:1.1rem}.lb-time{font-weight:700;font-size:.92rem;color:var(--accent-2);white-space:nowrap}.lb-xp{font-size:.88rem;color:var(--warn);white-space:nowrap}.rank-msg{font-size:1.1rem;font-weight:800;margin:4px 0 8px;color:var(--accent-2)}@media (max-width: 480px){.card{padding:26px 20px}.mode-grid{grid-template-columns:1fr}.stats-row{gap:8px}.stat-value{font-size:1.05rem}.action-row{flex-direction:column}.primary-btn{min-width:0}.play-header{flex-wrap:wrap}.lb-row{grid-template-columns:30px 1fr auto auto;gap:8px;padding:10px 11px}.lb-level{display:none}.lb-name{font-size:.95rem}.lb-time{font-size:.85rem}.lb-xp{font-size:.8rem}}