:root{color-scheme:light;--ink:#302c5d;--purple:#7853cb;--pink:#eb6b9d;--blue:#4c91d2;--mint:#36a7a0;--gold:#e4a13d}
*{box-sizing:border-box}
html{min-height:100%;scroll-behavior:smooth}
body{min-width:320px;min-height:100vh;min-height:100svh;margin:0;background:#a6c9ee;color:var(--ink);font-family:"Trebuchet MS","Avenir Next",Arial,sans-serif}
body::before{content:"";position:fixed;inset:0;z-index:-2;background-image:linear-gradient(180deg,rgba(255,230,249,.03) 0%,rgba(235,229,255,.08) 44%,rgba(88,59,136,.21) 100%),url("./assets/unicorn-land.webp");background-position:center;background-size:cover}
body::after{content:"";position:fixed;inset:0;z-index:-1;background:linear-gradient(90deg,rgba(125,77,157,.06),transparent 26%,transparent 74%,rgba(125,77,157,.06));pointer-events:none}
button{font:inherit;cursor:pointer;-webkit-tap-highlight-color:transparent}
button:focus-visible{outline:4px solid #fff;outline-offset:4px;box-shadow:0 0 0 7px #7052be}
.app-shell{min-height:100svh;padding:16px 18px 34px}
.topbar{max-width:1120px;margin:0 auto;display:flex;align-items:center;justify-content:space-between;gap:22px;padding:12px 19px;background:rgba(255,255,255,.87);border:2px solid rgba(255,255,255,.9);border-radius:28px;box-shadow:0 12px 30px rgba(58,49,119,.14);backdrop-filter:blur(18px)}
.brand{display:flex;align-items:center;gap:16px;min-width:0}
.brand-photo{width:72px;height:72px;flex:none;object-fit:cover;border-radius:20px;border:3px solid #fff;box-shadow:0 0 0 3px #e8a8cb,0 5px 15px rgba(98,48,107,.16)}
.brand-overline{margin:0 0 1px;color:#8771bf;font-size:.77rem;font-weight:900;letter-spacing:.16em}
.brand h1{margin:0;color:#3a346a;font-size:clamp(1.45rem,2.65vw,2.2rem);line-height:1.13;letter-spacing:-.045em;white-space:nowrap}
.title-star{display:inline-block;margin-left:.22em;color:#f8ac59;font-size:.65em;vertical-align:top}
.header-controls{display:flex;align-items:center;gap:8px}
.control-button{min-height:45px;display:inline-flex;align-items:center;justify-content:center;gap:7px;padding:8px 12px;border:1px solid #ded8f4;border-radius:15px;background:#f5f1ff;color:#6156a5;font-size:.9rem;font-weight:900;white-space:nowrap;transition:transform .18s,background .18s,border-color .18s}
.control-button:hover{transform:translateY(-2px);background:#ede6ff}
.control-button.active{background:#e5f8f3;color:#267e7c;border-color:#c9eae3}
.control-button svg,.reset-button svg{width:20px;height:20px;flex:none}
.game-content{position:relative;max-width:1100px;margin:0 auto}
.welcome{text-align:center;margin:21px auto 14px;color:#302b62;text-shadow:0 1px 10px rgba(255,255,255,.95)}
.section-ribbon{display:inline-flex;align-items:center;gap:9px;padding:7px 17px;background:rgba(255,255,255,.87);border:1px solid rgba(255,255,255,.95);border-radius:999px;color:#784ba6;text-shadow:none;font-size:.77rem;font-weight:900;letter-spacing:.16em;box-shadow:0 3px 14px rgba(91,69,152,.12);backdrop-filter:blur(6px)}
.section-ribbon span{font-size:1rem;line-height:1}
.welcome h2{margin:9px 0 3px;font-size:clamp(1.85rem,4vw,2.65rem);line-height:1.14;letter-spacing:-.035em}
.welcome p{margin:0;font-size:1rem;font-weight:700;line-height:1.4}
.level-picker{max-width:750px;margin:15px auto 16px;display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
.level-button{min-height:60px;display:flex;align-items:center;justify-content:center;gap:9px;padding:8px 10px;border:2px solid rgba(255,255,255,.72);border-radius:18px;background:rgba(255,255,255,.83);color:#5e5a8f;box-shadow:0 7px 18px rgba(64,56,125,.12);backdrop-filter:blur(8px);transition:transform .18s,background .18s,box-shadow .18s}
.level-button:hover{transform:translateY(-3px)}
.level-button.selected{background:#7456cc;color:#fff;border-color:#fff;box-shadow:0 7px 0 #503c9d,0 12px 22px rgba(43,35,99,.21);transform:translateY(-3px)}
.level-icon{color:#f6ae55;font-size:.75rem;letter-spacing:-.14em;white-space:nowrap}
.level-button.selected .level-icon{color:#ffe1a5}
.level-name{font-size:1.05rem;font-weight:900}
.level-range{padding:3px 8px;border-radius:999px;background:rgba(93,83,155,.1);font-size:.86rem;font-weight:900;white-space:nowrap}
.level-button.selected .level-range{background:rgba(255,255,255,.2)}
.game-card{max-width:750px;margin:0 auto;position:relative;overflow:hidden;padding:21px 33px 27px;border:3px solid #fff;border-radius:32px;background:rgba(255,254,255,.95);box-shadow:0 10px 0 rgba(65,47,135,.35),0 24px 55px rgba(28,35,91,.29);backdrop-filter:blur(16px)}
.game-card::before{content:"";position:absolute;inset:0 0 auto;height:100px;background:linear-gradient(180deg,rgba(239,231,255,.7),rgba(255,255,255,0));pointer-events:none}
.card-top{position:relative;z-index:1;display:flex;align-items:center;gap:12px}
.score-box,.combo-box{min-width:150px;display:flex;align-items:center;gap:10px;padding:8px 14px;border:1px solid #f9d7e4;border-radius:17px;background:#fff0f6}
.score-box{color:#bb4b7b}.combo-box{background:#f2edff;border-color:#e4d9ff;color:#7356bb}
.score-icon,.combo-icon{display:grid;place-items:center;width:38px;height:38px;flex:none;border-radius:12px;background:#ffd8a3;color:#a56720;font-size:1.45rem;line-height:1}
.combo-icon{background:#ddd2ff;color:#7050bb;font-size:1.2rem}
.stat-label{display:block;font-size:.72rem;font-weight:900;letter-spacing:.14em;line-height:1.1}
.score-box strong,.combo-box strong{display:block;font-size:1.5rem;line-height:1.1}
.reset-button{margin-left:auto;display:inline-flex;align-items:center;gap:6px;padding:9px 10px;border:0;border-radius:12px;background:transparent;color:#726b98;font-size:.91rem;font-weight:900}
.reset-button:hover{background:#f1ebfb;color:#6044b5}
.question-area{position:relative;text-align:center;padding-top:12px}
.question-badge{display:inline-block;padding:6px 13px;border:1px solid #e7ddff;border-radius:999px;background:#f2eeff;color:#735ab4;font-size:.75rem;font-weight:900;letter-spacing:.12em}
.question-prompt{margin:9px 0 0;color:#615c86;font-size:1.05rem;font-weight:800}
.equation{display:flex;align-items:center;justify-content:center;gap:.16em;min-height:103px;margin:0;font-size:clamp(4.2rem,8vw,5.7rem);font-weight:900;letter-spacing:-.06em;line-height:1.14;font-variant-numeric:tabular-nums}
.equation #factorA{color:#7153c8}.equation #factorB{color:#458cd0}.equation .multiply{color:#e2a544;font-size:.73em}.equation .equals{color:#847d9e;font-size:.66em}.equation .question-mark{color:#f278aa}
.feedback{min-height:35px;display:flex;align-items:center;justify-content:center;text-align:center;margin:0 0 10px;color:#776e97;font-size:1rem;font-weight:800;line-height:1.25}
.feedback.success{color:#239a79}.feedback.error{color:#cc5b7a}
.answer-grid{position:relative;z-index:1;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
.answer-button{position:relative;min-height:86px;display:grid;place-items:center;overflow:hidden;border:2px solid var(--tile-border);border-bottom-width:5px;border-radius:21px;background:var(--tile-bg);color:var(--tile-ink);font-size:2.45rem;font-weight:900;font-variant-numeric:tabular-nums;transition:transform .17s,box-shadow .17s,filter .17s}
.answer-button:hover:not(:disabled){transform:translateY(-4px);box-shadow:0 7px 15px rgba(57,40,111,.14);filter:saturate(1.1)}
.answer-button:active:not(:disabled){transform:translateY(0)}
.answer-button:disabled{cursor:default;opacity:1}
.answer-button:nth-child(1){--tile-bg:#ffe4ec;--tile-border:#f4a4bf;--tile-ink:#ae4770}
.answer-button:nth-child(2){--tile-bg:#e9ddff;--tile-border:#bba7ed;--tile-ink:#694eb0}
.answer-button:nth-child(3){--tile-bg:#d9f6f3;--tile-border:#89d7d0;--tile-ink:#27877f}
.answer-button:nth-child(4){--tile-bg:#ffedca;--tile-border:#efc976;--tile-ink:#a5702b}
.answer-button.correct{--tile-bg:#c9f5de;--tile-border:#46c792;--tile-ink:#157753;box-shadow:0 0 0 3px rgba(69,199,145,.25);animation:answer-pop .48s ease both}
.answer-button.wrong{--tile-bg:#ffcfda;--tile-border:#ee7891;--tile-ink:#bc3c5e;animation:answer-shake .4s ease both}
.answer-index{position:absolute;top:12px;left:13px;display:grid;place-items:center;width:26px;height:26px;border-radius:9px;background:rgba(255,255,255,.65);font-size:.85rem;color:inherit}
.card-corner{position:absolute;right:21px;top:53%;font-size:3rem;color:#e9dbff;pointer-events:none;z-index:0}
.sparkle{position:absolute;left:50%;top:51%;z-index:5;color:var(--sparkle-color,#f6ad59);font-size:1.4rem;pointer-events:none;animation:sparkle-fly .85s ease-out forwards}
.magic-sky{position:fixed;inset:0;z-index:6;overflow:hidden;pointer-events:none}
.magic-particle{position:absolute;left:var(--left);bottom:-50px;color:var(--color);font-size:var(--size);line-height:1;text-shadow:0 0 10px currentColor,0 0 20px rgba(255,255,255,.9);opacity:0;animation:magic-float var(--duration) ease-in-out var(--delay) infinite}
@keyframes magic-float{0%{opacity:0;transform:translate3d(0,20px,0) scale(.5) rotate(-25deg)}14%{opacity:var(--opacity)}75%{opacity:var(--opacity)}100%{opacity:0;transform:translate3d(var(--drift),-115vh,0) scale(1.2) rotate(145deg)}}
@keyframes answer-pop{50%{transform:scale(1.045)}to{transform:scale(1)}}
@keyframes answer-shake{25%,75%{transform:translateX(-6px)}50%{transform:translateX(6px)}}
@keyframes sparkle-fly{0%{opacity:1;transform:translate(-50%,-50%) scale(.5)}100%{opacity:0;transform:translate(var(--dx),var(--dy)) scale(1.5)}}
@media(max-width:760px){body::before{background-position:5% center}.app-shell{padding:12px 12px 30px}.topbar{padding:10px 12px;gap:10px}.brand-photo{width:62px;height:62px;border-radius:16px}.brand{gap:11px}.brand-overline{font-size:.65rem}.brand h1{font-size:1.5rem}.control-button{width:44px;height:44px;min-height:44px;padding:8px}.control-button span{display:none}.header-controls{gap:6px}.game-card{padding:18px 22px 23px}.welcome{margin-top:18px}}
@media(max-width:560px){.topbar{flex-wrap:wrap}.brand{width:100%}.header-controls{width:100%;justify-content:space-between}.control-button{width:auto;flex:1;min-height:38px;height:38px;border-radius:11px}.control-button span{display:inline;font-size:.79rem}.control-button svg{width:17px;height:17px}.welcome{margin:16px 0 11px}.welcome h2{font-size:1.82rem;margin-top:7px}.welcome p{font-size:.9rem;line-height:1.35}.section-ribbon{font-size:.64rem;letter-spacing:.1em;padding:5px 12px}.level-picker{gap:6px;margin:12px auto 15px}.level-button{min-height:63px;flex-direction:column;gap:0;padding:5px 3px;border-radius:14px}.level-icon{font-size:.6rem;line-height:1.1}.level-name{font-size:.94rem}.level-range{font-size:.72rem;padding:1px 6px}.game-card{border-radius:24px;padding:14px 14px 18px}.card-top{gap:6px}.score-box,.combo-box{min-width:0;flex:1;gap:6px;padding:7px;border-radius:12px}.score-icon,.combo-icon{width:29px;height:29px;border-radius:9px;font-size:1.05rem}.stat-label{font-size:.61rem;letter-spacing:.1em}.score-box strong,.combo-box strong{font-size:1.15rem}.reset-button{padding:8px 5px}.reset-button span{display:none}.reset-button svg{width:19px;height:19px}.question-area{padding-top:11px}.question-prompt{font-size:.95rem;margin-top:8px}.equation{min-height:89px;font-size:clamp(3.7rem,14vw,4.8rem)}.feedback{font-size:.9rem;min-height:39px;margin-bottom:7px}.answer-grid{gap:8px}.answer-button{min-height:78px;border-radius:15px;font-size:2.1rem}.answer-index{top:7px;left:7px;width:21px;height:21px;border-radius:7px;font-size:.7rem}.card-corner{display:none}}
@media(max-width:380px){.control-button span{font-size:.72rem}.brand h1{font-size:1.34rem}.welcome p{font-size:.83rem}.score-icon,.combo-icon{display:none}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{scroll-behavior:auto!important;animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}.magic-sky{display:none}}