@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@500;600;700;800&family=Space+Grotesk:wght@600;700&family=Space+Mono:wght@700&display=swap');
:root{--mf-bg:#090522;--mf-panel:#170d39;--mf-line:#d8b4fe47;--mf-text:#fff;--mf-muted:#e2e8f0;--mf-pink:#e94de7;--mf-cyan:#67e8f9;--mf-gold:#fbbf24;--mf-good:#34d399;--mf-bad:#fb7185}*{box-sizing:border-box}html{background:var(--mf-bg)}body.math-flip-page{min-width:0;margin:0;color:var(--mf-text);background:radial-gradient(circle at 76% 18%,#7c3aed3d,transparent 30%),linear-gradient(155deg,#090522,#160a37 58%,#0b2541);font-family:"Plus Jakarta Sans",sans-serif;overflow-x:hidden}.math-flip-page [hidden]{display:none!important}button,select{font:inherit}.sound-toggle{display:grid;place-items:center;width:44px;height:44px;border:1px solid #ffffff2e;border-radius:50%;color:#fff;background:#ffffff0d;font-weight:800;cursor:pointer}.math-flip-shell{width:min(980px,calc(100% - 32px));min-height:calc(100dvh - 128px);margin:0 auto;padding:clamp(20px,4vw,40px) 0}.game-heading{display:flex;align-items:center;justify-content:space-between;gap:24px;margin-bottom:16px}.game-heading h1,.setup-card h2,.round-heading h2,.result-dialog h2{margin:0;font-family:"Space Grotesk",sans-serif;letter-spacing:-.02em}.game-heading h1{font-size:clamp(34px,6vw,58px)}.game-heading h1 span{color:#f0abfc}.game-heading p{max-width:55ch;margin:5px 0 0;color:var(--mf-muted);line-height:1.5}.eyebrow{margin:0!important;color:#f0abfc!important;font:700 11px/1.4 "Space Mono",monospace!important;letter-spacing:.08em;text-transform:uppercase}.game-mark{display:grid;place-items:center;width:82px;height:82px;flex:0 0 82px;border:1px solid #fde68a99;border-radius:24px;color:#30134c;background:linear-gradient(145deg,#fde047,#fb923c);box-shadow:0 12px 30px #05010fa8;font:900 23px "Space Grotesk",sans-serif;transform:rotate(4deg)}.setup-card,.play-card{border:1px solid var(--mf-line);border-radius:16px;background:linear-gradient(145deg,#1c1043ed,#10092eea);box-shadow:0 18px 50px #02000f70}.setup-card{display:grid;grid-template-columns:minmax(0,1fr) minmax(300px,420px);gap:24px;padding:clamp(20px,4vw,40px)}.setup-copy{display:flex;align-items:flex-start;gap:16px}.setup-copy>span{font-size:44px}.setup-copy h2{margin:5px 0 8px;font-size:clamp(24px,4vw,38px)}.setup-copy p:last-child{max-width:48ch;margin:0;color:var(--mf-muted);line-height:1.6}.setup-controls{display:grid;grid-template-columns:1fr 1fr;gap:12px}.setup-controls label{display:grid;gap:7px;color:#d8b4fe;font:700 11px "Space Mono",monospace;text-transform:uppercase}.setup-controls select{width:100%;min-height:48px;padding:0 36px 0 13px;border:1px solid var(--mf-line);border-radius:12px;color:#fff;background:#10092d}.primary-action{min-height:48px;border:0;border-radius:12px;color:#fff;background:linear-gradient(110deg,#9c1fc1,#4f46e5);box-shadow:0 8px 20px #6d28d94d;font-weight:800;cursor:pointer}.setup-controls .primary-action{grid-column:1/-1}.play-card{padding:clamp(14px,3vw,24px)}.game-hud{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:8px}.game-hud>span{min-width:0;padding:9px 12px;border:1px solid #ffffff17;border-radius:12px;background:#ffffff08;text-align:center}.game-hud small{display:block;margin-bottom:3px;color:#d8b4fe;font:700 9px "Space Mono",monospace;letter-spacing:.06em;text-transform:uppercase}.game-hud b,.game-hud i{font-style:normal}.timer b{color:var(--mf-cyan)}.progress-track{height:5px;margin:9px 0 13px;overflow:hidden;border-radius:999px;background:#ffffff12}.progress-track i{display:block;width:0;height:100%;border-radius:inherit;background:linear-gradient(90deg,#e94de7,#67e8f9);transition:width .2s}.round-heading{display:flex;align-items:end;justify-content:space-between;gap:16px}.round-heading h2{margin-top:4px;font-size:clamp(20px,3vw,29px)}.round-heading button{min-height:44px;padding:0 14px;border:1px solid var(--mf-line);border-radius:12px;color:#fff;background:#ffffff0b;font-weight:700;cursor:pointer}.flip-stage{display:grid;place-items:center;min-height:220px;padding:14px}.equation-card{position:relative;display:grid;place-items:center;width:min(390px,100%);min-height:176px;padding:28px;border:2px solid #f0abfc99;border-radius:24px;background:radial-gradient(circle at 50% 15%,#ffffff21,transparent 35%),linear-gradient(145deg,#7138d4,#b624bd 58%,#e34c95);box-shadow:0 18px 42px #03001299,0 0 28px #d946ef33;transform-style:preserve-3d;transition:transform .34s,border-color .2s}.equation-card::before,.equation-card::after{content:"";position:absolute;width:34px;height:34px;border:1px solid #fff5;border-radius:10px;transform:rotate(12deg)}.equation-card::before{left:18px;top:17px}.equation-card::after{right:18px;bottom:17px;transform:rotate(-12deg)}.equation-card strong{font:800 clamp(42px,8vw,72px)/1 "Space Grotesk",sans-serif;text-shadow:0 6px 16px #2b075f80}.equation-card small{color:#fff;font:700 22px "Space Mono",monospace}.equation-icon{position:absolute;right:18px;top:14px;font-size:22px}.equation-card.flipped{transform:perspective(700px) rotateY(8deg) scale(.97)}.equation-card.right{border-color:#6ee7b7}.equation-card.wrong{border-color:#fda4af}.game-status{min-height:23px;margin:0 0 9px;color:var(--mf-muted);font-size:13px;text-align:center}.answer-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px}.answer-grid button{min-height:64px;border:1px solid #d8b4fe4f;border-radius:16px;color:#fff;background:linear-gradient(145deg,#29155d,#15103a);font:800 clamp(20px,3vw,29px) "Space Grotesk",sans-serif;cursor:pointer;transition:transform .15s,border-color .15s}.answer-grid button:hover{transform:translateY(-2px);border-color:#f0abfc}.answer-grid button.correct{border-color:#6ee7b7;background:#11614a}.answer-grid button.wrong{border-color:#fda4af;background:#72243b}.result-dialog{width:min(470px,calc(100% - 28px));padding:0;border:1px solid var(--mf-line);border-radius:16px;color:#fff;background:#160d38;box-shadow:0 24px 80px #000b;text-align:center}.result-dialog::backdrop{background:#050216c7;backdrop-filter:blur(5px)}.result-dialog>div{padding:28px}.result-icon{font-size:46px}.result-dialog h2{margin:8px 0;font-size:30px}.result-dialog p:not(.eyebrow){color:var(--mf-muted)}.result-score{display:grid;margin:16px auto}.result-score strong{font:700 42px "Space Grotesk",sans-serif}.result-score span{color:#d8b4fe;font:700 10px "Space Mono",monospace;text-transform:uppercase}.result-stats{display:flex;justify-content:center;gap:20px;margin-bottom:18px;color:#d8b4fe;font-size:12px}.result-stats b{display:block;margin-top:3px;color:#fff;font-size:17px}.result-actions{display:grid;grid-template-columns:1fr 1fr;gap:10px}.result-actions a{display:grid;place-items:center;min-height:48px;border:1px solid var(--mf-line);border-radius:12px;color:#fff;text-decoration:none;font-weight:800}button:focus-visible,select:focus-visible,a:focus-visible{outline:3px solid var(--mf-cyan);outline-offset:3px}
@media(max-width:700px){.math-flip-shell{width:min(100% - 20px,620px);padding:16px 0 22px}.game-heading{gap:12px}.game-mark{width:62px;height:62px;flex-basis:62px;border-radius:18px;font-size:18px}.setup-card{grid-template-columns:1fr;gap:18px;padding:18px}.flip-stage{min-height:190px;padding:10px}.equation-card{min-height:154px}.answer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.round-heading{align-items:flex-start}.round-heading button{padding-inline:10px;font-size:12px}}
@media(max-width:430px){.site-back{padding-inline:10px}.game-heading h1{font-size:34px}.game-heading>div>p:last-child{font-size:13px}.setup-copy>span{font-size:34px}.setup-controls{grid-template-columns:1fr}.setup-controls .primary-action{grid-column:auto}.game-hud{gap:5px}.game-hud>span{padding:8px 3px}.game-hud b{font-size:13px}.flip-stage{min-height:168px;padding:8px}.equation-card{min-height:140px;padding:20px}.answer-grid button{min-height:56px}.result-actions{grid-template-columns:1fr}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{scroll-behavior:auto!important;animation-duration:.01ms!important;transition-duration:.01ms!important}}