*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}body{background:linear-gradient(135deg,#0f0c29 0%,#302b63 50%,#24243e 100%);min-height:100vh;font-family:Segoe UI,system-ui,-apple-system,sans-serif;color:#fff;overflow-x:hidden}.app{min-height:100vh;display:flex;flex-direction:column;align-items:center;padding:16px 16px 40px}.app-header{text-align:center;margin-bottom:12px}.app-title{font-size:clamp(1.4rem,5vw,2rem);font-weight:800;background:linear-gradient(to right,#4facfe,#00f2fe);-webkit-background-clip:text;-webkit-text-fill-color:transparent;margin-bottom:12px}.scoreboard{display:inline-flex;gap:0;align-items:center;background:rgba(255,255,255,.08);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border:1px solid rgba(255,255,255,.12);border-radius:50px;padding:8px 20px}.score-item{text-align:center;padding:0 12px}.score-divider{width:1px;height:28px;background:rgba(255,255,255,.2)}.score-value{font-size:1.35rem;font-weight:700;color:#4facfe;line-height:1}.score-value.streak-hot{background:linear-gradient(to right,#f7971e,#ffd200);-webkit-background-clip:text;-webkit-text-fill-color:transparent}.score-label{font-size:.65rem;color:#ffffff80;text-transform:uppercase;letter-spacing:1px;margin-top:2px}.instructions{display:flex;justify-content:space-between;align-items:center;width:min(340px,90vw);margin:8px 0 4px;font-size:.82rem;font-weight:600}.inst-fake{color:#ef4444}.inst-real{color:#22c55e}.inst-hint{color:#ffffff59;font-size:.72rem;font-weight:400}.card-stack{position:relative;width:min(340px,90vw);height:460px;margin:8px auto}.swipe-card{position:absolute;top:0;left:0;width:100%;min-height:410px;background:#ffffff;border-radius:20px;padding:22px 22px 18px;box-shadow:0 12px 48px #00000073;display:flex;flex-direction:column;color:#111827;-webkit-user-select:none;user-select:none;touch-action:pan-y;transform-origin:center bottom}.label{position:absolute;top:18px;padding:5px 12px;border-radius:6px;font-size:1.2rem;font-weight:900;letter-spacing:2px;border:3px solid;pointer-events:none}.label-real{right:18px;color:#16a34a;border-color:#16a34a;transform:rotate(12deg)}.label-fake{left:18px;color:#dc2626;border-color:#dc2626;transform:rotate(-12deg)}.card-source{font-size:.72rem;color:#6b7280;font-weight:500;margin-bottom:14px}.card-text{font-size:1rem;line-height:1.65;color:#1f2937;flex:1}.card-footer{display:flex;align-items:center;gap:8px;margin-top:18px}.card-category{padding:3px 10px;background:#f3f4f6;border-radius:20px;font-size:.7rem;color:#6b7280;text-transform:uppercase;letter-spacing:1px}.card-difficulty{padding:3px 10px;border-radius:20px;font-size:.7rem;text-transform:uppercase;letter-spacing:1px}.diff-easy{background:#dcfce7;color:#16a34a}.diff-medium{background:#fef3c7;color:#d97706}.diff-hard{background:#fee2e2;color:#dc2626}.result-overlay{position:fixed;bottom:24px;right:20px;max-width:280px;display:flex;flex-direction:column;gap:10px;background:rgba(15,15,25,.95);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);border-radius:16px;z-index:100;padding:16px 18px;pointer-events:none;border:1px solid rgba(255,255,255,.12)}.result-overlay--correct{border-left:4px solid #22c55e}.result-overlay--wrong{border-left:4px solid #ef4444}.result-correct{color:#22c55e}.result-wrong{color:#ef4444}.result-verdict{font-size:1rem;font-weight:700}.result-explanation{font-size:.85rem;line-height:1.5;color:#ffffffd9}.game-over{text-align:center;padding:40px 20px;width:min(400px,92vw);margin:auto}.game-over h2{font-size:clamp(1.8rem,6vw,2.5rem);font-weight:800;background:linear-gradient(to right,#4facfe,#00f2fe);-webkit-background-clip:text;-webkit-text-fill-color:transparent;margin-bottom:8px}.final-score{font-size:clamp(3rem,12vw,4.5rem);font-weight:900;color:#4facfe;line-height:1;margin-top:16px}.final-score-label{font-size:.85rem;color:#ffffff80;text-transform:uppercase;letter-spacing:2px;margin-bottom:8px}.grade{font-size:1.8rem;font-weight:800;margin:4px 0 20px}.stats-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:16px 0 24px}.stat-card{background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.1);border-radius:14px;padding:16px}.stat-value{font-size:1.9rem;font-weight:700;color:#4facfe;line-height:1}.stat-label{font-size:.68rem;color:#ffffff80;text-transform:uppercase;letter-spacing:1px;margin-top:4px}.restart-btn{background:linear-gradient(to right,#4facfe,#00f2fe);color:#0f0c29;font-weight:700;font-size:1rem;padding:14px 44px;border-radius:50px;border:none;cursor:pointer;transition:transform .15s,opacity .15s;box-shadow:0 4px 20px #4facfe66}.restart-btn:hover{transform:scale(1.05);opacity:.92}.restart-btn:active{transform:scale(.97)}.new-record-badge{display:inline-block;background:linear-gradient(to right,#f7971e,#ffd200);color:#0f0c29;font-weight:900;font-size:.85rem;letter-spacing:2px;padding:5px 16px;border-radius:50px;margin-bottom:8px;animation:pulse 1s ease-in-out infinite}.score-best{color:#a78bfa}.fetching-banner{font-size:.78rem;color:#fff6;margin-top:8px;animation:pulse 1.5s ease-in-out infinite}@keyframes pulse{0%,to{opacity:.4}50%{opacity:.9}}.auth-screen{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:24px}.auth-card{width:min(380px,100%);background:rgba(255,255,255,.07);-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);border:1px solid rgba(255,255,255,.12);border-radius:24px;padding:36px 28px 32px;text-align:center}.auth-subtitle{font-size:.8rem;color:#ffffff73;margin-bottom:28px}.auth-heading{font-size:1.2rem;font-weight:700;color:#fff;margin-bottom:20px}.auth-form{display:flex;flex-direction:column;gap:12px}.auth-input{width:100%;padding:13px 16px;border-radius:12px;border:1px solid rgba(255,255,255,.15);background:rgba(255,255,255,.08);color:#fff;font-size:.95rem;outline:none;transition:border-color .2s}.auth-input::placeholder{color:#ffffff59}.auth-input:focus{border-color:#4facfe}.auth-error{font-size:.82rem;color:#ef4444;text-align:left;margin:0}.auth-toggle{display:block;margin-top:18px;background:none;border:none;color:#4facfe;font-size:.85rem;cursor:pointer;text-decoration:underline}.user-bar{display:flex;align-items:center;gap:8px;margin-top:8px;justify-content:center}.user-name{font-size:.78rem;color:#fff9}.lb-btn{background:none;border:none;font-size:1.1rem;cursor:pointer;padding:2px 4px}.logout-btn{background:none;border:1px solid rgba(255,255,255,.2);color:#ffffff80;font-size:.72rem;padding:4px 10px;border-radius:20px;cursor:pointer;transition:opacity .15s}.logout-btn:hover{opacity:.7}.game-over-btns{display:flex;flex-direction:column;gap:12px;align-items:center}.leaderboard-btn{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.2);color:#fff;font-weight:600;font-size:.95rem;padding:13px 44px;border-radius:50px;cursor:pointer;transition:transform .15s,opacity .15s}.leaderboard-btn:hover{transform:scale(1.04);opacity:.85}.lb-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:rgba(0,0,0,.85);-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);z-index:200;display:flex;align-items:center;justify-content:center;padding:20px}.lb-card{width:min(420px,100%);max-height:80vh;background:linear-gradient(135deg,#1a1740 0%,#302b63 100%);border:1px solid rgba(255,255,255,.15);border-radius:24px;overflow:hidden;display:flex;flex-direction:column}.lb-header{display:flex;align-items:center;justify-content:space-between;padding:20px 24px 16px;border-bottom:1px solid rgba(255,255,255,.1)}.lb-title{font-size:1.2rem;font-weight:800;color:#fff}.lb-close{background:none;border:none;color:#ffffff80;font-size:1.1rem;cursor:pointer;padding:4px 8px;border-radius:8px}.lb-close:hover{color:#fff}.lb-list{overflow-y:auto;padding:8px 0 16px}.lb-row{display:grid;grid-template-columns:44px 1fr 64px 56px;align-items:center;padding:10px 24px;font-size:.88rem;color:#fffc}.lb-row-header{font-size:.68rem;text-transform:uppercase;letter-spacing:1px;color:#ffffff59;padding-bottom:6px}.lb-row:not(.lb-row-header):hover{background:rgba(255,255,255,.05)}.lb-mine{background:rgba(79,172,254,.12)!important;color:#4facfe;font-weight:700}.lb-col-rank{font-size:1rem}.lb-col-name{font-weight:600;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.lb-col-score{text-align:right;font-weight:700;color:#4facfe}.lb-col-games{text-align:right;color:#fff6;font-size:.8rem}