:root{color:#f8fafc;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;background:radial-gradient(circle at top left,rgba(14,165,233,.26),transparent 32rem),radial-gradient(circle at bottom right,rgba(168,85,247,.22),transparent 28rem),#08111f}*{box-sizing:border-box}body{margin:0;min-height:100vh}button{font:inherit}.game-shell{display:grid;gap:24px;margin:0 auto;max-width:1180px;padding:clamp(20px,4vw,56px)}.hero-card,.board-panel,.status-panel,.rules-panel{background:#0f172ad1;border:1px solid rgba(148,163,184,.22);border-radius:28px;box-shadow:0 24px 80px #00000047;-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px)}.hero-card{padding:clamp(26px,5vw,48px)}.eyebrow{color:#67e8f9;font-size:.78rem;font-weight:900;letter-spacing:.18em;margin:0 0 10px;text-transform:uppercase}h1,h2,p{margin-top:0}h1{color:#67e8f9;font-size:clamp(1.6rem,4vw,3rem);font-weight:900;letter-spacing:-.03em;line-height:1.2;margin-bottom:14px}h2{font-size:1.05rem;margin-bottom:14px}.hero-card p,.message,.empty-history,.history-list{color:#cbd5e1;line-height:1.65}.hero-card p{font-size:1.08rem;max-width:760px}.game-layout{align-items:stretch;display:grid;gap:24px;grid-template-columns:minmax(320px,1fr) 360px}.board-panel{padding:clamp(16px,3vw,28px)}.mode-toggle{display:flex;gap:10px;margin-bottom:18px}.mode-toggle button{background:#1e293bdb;border:1px solid rgba(148,163,184,.22);border-radius:999px;color:#cbd5e1;cursor:pointer;font-weight:900;min-height:44px;padding:0 18px}.mode-toggle button.active{background:#67e8f9;border-color:#67e8f9;color:#08111f}.board{display:grid;gap:clamp(10px,2vw,16px);grid-template-columns:repeat(4,minmax(0,1fr))}.square{aspect-ratio:1;background:linear-gradient(145deg,#1e293bf5,#0f172af5);border:1px solid rgba(148,163,184,.22);border-radius:22px;color:#f8fafc;cursor:pointer;display:grid;min-width:0;padding:12px;position:relative;transition:border-color .16s ease,box-shadow .16s ease,transform .16s ease}.square:hover:not(:disabled){border-color:#67e8f9;box-shadow:0 0 0 4px #67e8f91f;transform:translateY(-2px)}.square:disabled{cursor:default}.square.x{background:linear-gradient(145deg,#2563ebc2,#4338caad);border-color:#60a5fa7a}.square.ai{background:linear-gradient(145deg,#059669c2,#0d9488ad);border-color:#2dd4bf80}.square.o{background:linear-gradient(145deg,#7e22ceb8,#581c87a3);border-color:#c084fc70}.square.exploded{background:radial-gradient(circle,#facc1557,#7f1d1deb);border-color:#fb923ce0;box-shadow:inset 0 0 28px #facc152e,0 0 34px #f8717142}.square.winning{background:linear-gradient(145deg,#facc15,#f97316);box-shadow:0 0 34px #facc155c;color:#172033}.number{color:#e2e8f0b8;font-size:.86rem;font-weight:800;justify-self:start}.square strong{align-self:center;font-size:clamp(2.6rem,8vw,5.2rem);justify-self:center;line-height:1}.cell-explosion{align-self:center;border-radius:20px;justify-self:center;max-width:min(78%,112px);width:100%}.status-panel{align-content:start;display:grid;gap:16px;padding:clamp(18px,3vw,28px)}.status-grid{display:grid;gap:12px;grid-template-columns:1fr 1fr}.status-card{background:#1e293bd1;border:1px solid rgba(148,163,184,.18);border-radius:20px;padding:18px}.status-card span{color:#94a3b8;display:block;font-size:.75rem;font-weight:900;letter-spacing:.14em;margin-bottom:8px;text-transform:uppercase}.status-card strong{display:block;font-size:1.65rem}.primary-status strong{color:#67e8f9;font-size:2.1rem}.games-played-card{background:linear-gradient(145deg,#0ea5e938,#1e293bd1)}.games-played-card strong{color:#f8fafc;font-size:2rem}.message{background:#08111fb3;border:1px solid rgba(148,163,184,.16);border-radius:18px;margin-bottom:0;min-height:86px;padding:16px}.explosion-panel{align-items:center;background:linear-gradient(145deg,#7f1d1dcc,#581c87b3);border:1px solid rgba(251,146,60,.5);border-radius:22px;display:grid;gap:14px;grid-template-columns:84px minmax(0,1fr);padding:14px}.explosion-panel img{border-radius:18px;display:block;width:84px}.explosion-panel h2{color:#ffedd5;margin-bottom:6px}.explosion-panel p{color:#fee2e2;font-size:.95rem;line-height:1.45;margin-bottom:6px}.explosion-panel p:last-child{margin-bottom:0}.reset-button{background:#f8fafc;border:0;border-radius:999px;color:#08111f;cursor:pointer;font-weight:900;min-height:48px;padding:0 22px}.rules-panel{display:grid;gap:28px;grid-template-columns:1fr 1fr;padding:clamp(20px,3vw,32px)}.pairs-grid{display:grid;gap:10px;grid-template-columns:repeat(2,minmax(0,1fr))}.pairs-grid span,.history-list li,.empty-history{background:#1e293bb8;border:1px solid rgba(148,163,184,.14);border-radius:14px;padding:10px 12px}.history-list{display:grid;gap:10px;list-style-position:inside;margin:0;max-height:232px;overflow:auto;padding:0}.empty-history{margin:0}@media(max-width:900px){.game-layout,.rules-panel{grid-template-columns:1fr}}@media(max-width:520px){.game-shell{padding:14px}.board{gap:8px}.square{border-radius:16px;padding:8px}.status-grid,.pairs-grid{grid-template-columns:1fr}}