.c39-shell{color:#14213d;max-width:1180px;margin:0 auto;padding:28px 20px 72px}.c39-top{background:#fff;border-bottom:1px solid #d9e3f0;justify-content:space-between;align-items:center;gap:16px;margin-bottom:22px;padding:20px 28px;display:flex}.c39-top a{color:#2463bf;font-weight:800;text-decoration:none}.c39-top span{font-weight:650}.c39-hero{background:#fff;border-radius:28px;grid-template-columns:minmax(0,1.18fr) minmax(390px,.82fr);margin-bottom:24px;display:grid;overflow:hidden;box-shadow:0 18px 42px #163b691a}.c39-hero>div{flex-direction:column;justify-content:center;padding:54px 46px;display:flex}.c39-hero small,.c39-reading small,.c39-example small,.c39-practice small,.c39-mini-games small,.c39-quiz small,.c39-modes small{letter-spacing:.08em;color:#2d68c4;font-weight:850}.c39-hero h1{letter-spacing:-.04em;max-width:650px;margin:15px 0 22px;font-size:clamp(2.35rem,4.25vw,4rem);line-height:1.06}.c39-hero p{max-width:600px;margin:0 0 24px;font-size:1.12rem;line-height:1.6}.c39-hero aside{background:#e9f5ff;border-radius:16px;gap:5px;padding:16px;display:grid}.c39-hero aside span{line-height:1.42}.c39-hero img{object-fit:cover;width:100%;height:100%;min-height:440px}.c39-reading,.c39-example,.c39-practice,.c39-quiz,.c39-modes{background:#fff;border-radius:24px;margin:24px 0;padding:36px;box-shadow:0 12px 30px #163b6912}.c39-reading h2,.c39-example h2,.c39-practice h2,.c39-mini-games h2,.c39-quiz h2,.c39-modes h2{letter-spacing:-.025em;margin:8px 0 12px;font-size:clamp(1.55rem,2.6vw,2.25rem)}.c39-reading>p,.c39-example p,.c39-practice p,.c39-mini-games p,.c39-quiz>p{font-size:1.03rem;line-height:1.55}.c39-reading>div{grid-template-columns:repeat(3,1fr);gap:14px;margin-top:22px;display:grid}.c39-reading article{background:#eff7ff;border:1px solid #cfe2f8;border-radius:16px;gap:7px;padding:19px;display:grid}.c39-reading article b{color:#1d61bd;font-size:1.65rem}.c39-contexts{grid-template-columns:repeat(3,1fr);gap:18px;margin:24px 0;display:grid}.c39-contexts article{background:#fff;border:1px solid #dbe6f3;border-radius:20px;overflow:hidden;box-shadow:0 10px 22px #163b690f}.c39-contexts img{object-fit:cover;width:100%;height:178px}.c39-contexts article div{padding:16px 18px}.c39-contexts h3{margin:0 0 7px;font-size:1.23rem}.c39-contexts p{margin:0;line-height:1.45}.c39-example{grid-template-columns:1.25fr .75fr;align-items:center;gap:36px;display:grid}.c39-example ol{line-height:1.7}.c39-example strong{color:#17643b;background:#eaf7ef;border-radius:13px;padding:14px;line-height:1.4;display:block}.c39-number-line{background:linear-gradient(145deg,#eef7ff,#cfe8ff);border-radius:20px;flex-direction:column;justify-content:center;min-height:270px;padding:30px;display:flex}.c39-number-line>small{color:#2b63ad;letter-spacing:.07em;text-align:center;font-weight:900}.c39-number-line-track{border-top:3px solid #2862b5;justify-content:space-between;margin:3.5rem 0 2.5rem;display:flex;position:relative}.c39-number-line-track:before,.c39-number-line-track:after{color:#2862b5;font-size:1.25rem;font-weight:900;position:absolute;top:-.55rem}.c39-number-line-track:before{content:"‹";left:-.1rem}.c39-number-line-track:after{content:"›";right:-.1rem}.c39-number-line-track span{color:#233b67;justify-items:center;min-width:2.4rem;display:grid;position:relative}.c39-number-line-track i{background:#2862b5;width:3px;height:14px;margin-top:-8px}.c39-number-line-track b{margin-top:.4rem}.c39-number-line-track em{white-space:nowrap;border-radius:999px;padding:.3rem .48rem;font-size:.72rem;font-style:normal;font-weight:850;position:absolute;bottom:2.1rem}.c39-difference-segment{z-index:1;text-align:center;border-top:2px solid #d36a3e;width:50%;height:1.25rem;padding-top:.05rem;font-size:.8rem;font-weight:900;line-height:1;bottom:3.45rem;left:33.333%;color:#a44620!important;min-width:0!important;position:absolute!important}.c39-difference-segment:before{content:"◀";color:#d36a3e;font-size:.72rem;position:absolute;top:-.43rem;left:-.05rem}.c39-number-line-track .result-point i{background:#e36d3f;border-radius:50%;width:14px;height:14px;margin-top:-7px}.c39-number-line-track .result-point em{color:#8e3d1c;background:#ffe6da}.c39-number-line-track .reference-point i{background:#237d5a;border-radius:50%;width:14px;height:14px;margin-top:-7px}.c39-number-line-track .reference-point em{color:#146345;background:#dff4e9}.c39-number-line>p{color:#24527f;text-align:center;background:#ffffffb8;border-radius:12px;margin:0;padding:.8rem;line-height:1.35}.c39-mini-games{grid-template-columns:repeat(2,1fr);gap:22px;margin:24px 0;display:grid}.c39-mini-games article{background:#fff;border:1px solid #dbe6f3;border-radius:23px;padding:30px;box-shadow:0 12px 30px #163b6912}.c39-mini-games article>div:not(.c39-order){flex-wrap:wrap;gap:10px;display:flex}.c39-mini-games button,.c39-options button,.c39-controls button,.c39-bank>button,.c39-quiz button{font:inherit;color:#1a4c91;cursor:pointer;background:#fff;border:1px solid #92b6e8;border-radius:11px;padding:11px 15px;font-weight:750}.c39-mini-games button:hover,.c39-options button:hover,.c39-bank>button:hover,.c39-quiz button:hover{background:#eaf4ff}.c39-mini-games button.right,.c39-options button.correct{color:#146038;background:#dff6e8;border-color:#43a86d}.c39-mini-games button.wrong,.c39-options button.incorrect{color:#a43a2b;background:#fff0ed;border-color:#e88774}.c39-order{gap:10px;display:grid}.c39-order button{text-align:left}.c39-order button:disabled{opacity:1;color:#275caa;background:#e6f1ff}.c39-good,.c39-tip{border-radius:12px;margin:16px 0 0!important;padding:12px 14px!important}.c39-good{color:#165d38;background:#e2f7e9}.c39-tip{color:#805a10;background:#fff4dc}.c39-mini-games .c39-tip button,.c39-mini-games .c39-good button{background:#fff;margin-top:10px;display:block}.c39-practice{grid-template-columns:.62fr 1.38fr;align-items:center;gap:36px;display:grid}.c39-practice-visual{color:#fff;background:linear-gradient(145deg,#1e4f98,#5ba9dc);border-radius:20px;flex-direction:column;justify-content:center;align-items:center;gap:10px;min-height:265px;display:flex}.c39-practice-visual span{font-size:5.5rem;line-height:1}.c39-practice-visual b{text-transform:capitalize;font-size:1.2rem}.c39-options{flex-wrap:wrap;gap:12px;margin:16px 0;display:flex}.c39-options button{min-width:76px;font-size:1.08rem}.c39-controls{justify-content:space-between;gap:12px;margin-top:20px;display:flex}.c39-controls button:last-child,.c39-bank>button{color:#fff;background:#2864bd;border-color:#2864bd}.c39-controls button:disabled{opacity:.45;cursor:not-allowed}.c39-bank{margin:24px 0}.c39-bank>button{width:100%;font-size:1.02rem}.c39-bank>div{grid-template-columns:repeat(2,1fr);gap:10px;margin-top:15px;display:grid}.c39-bank article{background:#fff;border:1px solid #dae5f2;border-radius:12px;grid-template-columns:34px 1fr auto;align-items:center;gap:10px;padding:13px;display:grid}.c39-bank article b{color:#1f5cae;text-align:center;background:#e2f0ff;border-radius:8px;padding:6px}.c39-bank article strong{color:#176a42}.c39-quiz>div{grid-template-columns:repeat(2,1fr);gap:14px;display:grid}.c39-quiz article{border:1px solid #dce7f5;border-radius:15px;padding:18px}.c39-quiz article p{margin:8px 0}.c39-quiz article button{margin-right:8px;padding:8px 12px}.c39-quiz button.selected{color:#fff;background:#2864bd}.c39-quiz aside{background:#e8f5ff;border-radius:15px;flex-wrap:wrap;align-items:center;gap:12px;margin-top:20px;padding:18px;display:flex}.c39-quiz aside span{flex:1;min-width:220px}.c39-quiz aside button{color:#fff;background:#2864bd}.c39-modes>div{grid-template-columns:repeat(3,1fr);gap:14px;display:grid}.c39-modes a{color:inherit;border:1px solid #cbdff5;border-radius:15px;gap:8px;min-height:138px;padding:20px;text-decoration:none;display:grid}.c39-modes a:hover{border-color:#2e6bc4;box-shadow:0 8px 20px #2664bd1f}.c39-modes a b{color:#2c66bd;font-size:.75rem}.c39-modes a strong{font-size:1.25rem}.c39-modes a span{line-height:1.38}@media (max-width:950px){.c39-shell{padding:20px 16px 56px}.c39-hero{grid-template-columns:1fr 1fr}.c39-hero>div{padding:38px 30px}.c39-hero img{min-height:360px}.c39-contexts{grid-template-columns:1fr 1fr}.c39-contexts article:last-child{grid-column:1/-1}.c39-example,.c39-practice{grid-template-columns:1fr;gap:24px}.c39-practice-visual{min-height:180px}.c39-modes>div{grid-template-columns:1fr}.c39-modes a{min-height:auto}.c39-reading>div,.c39-quiz>div{grid-template-columns:1fr}}@media (max-width:640px){.c39-shell{padding:12px 12px 46px}.c39-top{flex-direction:column;align-items:flex-start;padding:16px;font-size:.94rem}.c39-hero{border-radius:20px;grid-template-columns:1fr}.c39-hero>div{padding:31px 24px}.c39-hero h1{font-size:2.45rem}.c39-hero img{height:220px;min-height:220px}.c39-reading,.c39-example,.c39-practice,.c39-quiz,.c39-modes{border-radius:19px;padding:24px 19px}.c39-contexts,.c39-mini-games{grid-template-columns:1fr}.c39-contexts article:last-child{grid-column:auto}.c39-contexts img{height:200px}.c39-mini-games article{padding:24px 19px}.c39-bank>div{grid-template-columns:1fr}.c39-bank article{font-size:.92rem}.c39-controls{flex-direction:column}.c39-controls button{width:100%}.c39-number-line{min-height:215px;padding:22px 14px}.c39-number-line-track{margin:3.2rem 0 2.2rem}.c39-number-line-track b{font-size:.8rem}.c39-number-line-track em{font-size:.62rem}.c39-quiz aside{align-items:stretch}.c39-quiz aside button{width:100%}}.c39-hero-image{background:#eaf3fb;justify-content:center;align-items:center;padding:10px;display:flex}.c39-hero-image img{object-position:center;background:#eaf3fb;width:100%;height:100%;max-height:440px;object-fit:contain!important;min-height:0!important}.c39-quick{background:#fff;border-radius:16px;grid-template-columns:repeat(4,1fr);gap:10px;margin:0 0 24px;padding:12px;display:grid;box-shadow:0 8px 22px #163b6912}.c39-quick a{text-align:center;color:#1d5faf;border:1px solid #d5e5f6;border-radius:10px;padding:12px 9px;font-weight:800;text-decoration:none}.c39-quick a:hover{background:#eaf4ff;border-color:#2f70c9}@media (max-width:950px){.c39-hero-image img{max-height:350px}.c39-quick{grid-template-columns:repeat(2,1fr)}}@media (max-width:640px){.c39-hero-image{padding:8px}.c39-hero-image img{aspect-ratio:16/10;max-height:none;object-fit:contain!important;height:auto!important;min-height:0!important}.c39-quick{z-index:5;grid-template-columns:1fr 1fr;position:sticky;top:8px}.c39-quick a{padding:10px 6px;font-size:.88rem}}.c39-route{background:#fff;border-top:6px solid #3472c6;border-radius:24px;margin:24px 0;padding:34px;box-shadow:0 12px 30px #163b6914}.c39-route.orange{border-color:#e4932d}.c39-route.green{border-color:#2e9b69}.c39-route.purple{border-color:#8064c5}.c39-route-head{justify-content:space-between;align-items:flex-start;gap:22px;display:flex}.c39-route-head small{letter-spacing:.08em;color:#2d68c4;font-weight:850}.c39-route-head h2{margin:8px 0;font-size:clamp(1.65rem,2.7vw,2.35rem)}.c39-route-head p{margin:0;line-height:1.45}.c39-route-head>strong{color:#1a5ba9;white-space:nowrap;background:#eaf4ff;border-radius:12px;padding:11px 14px}.c39-progress{gap:10px;margin:25px 0;display:flex}.c39-progress span{color:#5b6c82;background:#edf2f8;border:2px solid #d7e1ed;border-radius:50%;place-items:center;width:38px;height:38px;font-weight:850;display:grid}.c39-progress span.current{color:#1c5bab;background:#e8f2ff;border-color:#2966be}.c39-progress span.done{color:#17653c;background:#dff6e8;border-color:#48ae74}.c39-challenge{background:#f7fbff;border:1px solid #d5e6f7;border-radius:20px;grid-template-columns:115px 1fr;gap:24px;padding:28px;display:grid}.c39-challenge-mark{background:#e7f2ff;border-radius:18px;place-items:center;min-height:115px;font-size:4rem;display:grid}.c39-challenge small{letter-spacing:.06em;color:#2a68bf;font-weight:850}.c39-challenge h3{margin:13px 0;font-size:1.42rem}.c39-situation{margin:12px 0;font-size:1.08rem;line-height:1.5}.c39-challenge-controls{justify-content:space-between;gap:12px;margin-top:20px;display:flex}.c39-challenge-controls button,.c39-mission-complete button{font:inherit;cursor:pointer;color:#1d5caf;background:#fff;border:1px solid #2b68bf;border-radius:11px;padding:11px 15px;font-weight:800}.c39-challenge-controls button:last-child,.c39-mission-complete button{color:#fff;background:#2864bd}.c39-challenge-controls button:disabled{opacity:.4;cursor:not-allowed}.c39-mission-complete{text-align:center;background:#effbf4;border:1px solid #cbeed8;border-radius:20px;padding:32px}.c39-mission-complete>div{font-size:3.6rem}.c39-mission-complete h3{margin:8px;font-size:1.7rem}.c39-mission-complete a{color:#fff;background:#2864bd;border-radius:11px;padding:12px 16px;font-weight:800;text-decoration:none;display:inline-block}.c39-quiz article strong{margin:11px 0;display:block}.c39-quiz article button{font-size:.9rem}@media (max-width:640px){.c39-route{border-radius:19px;padding:24px 18px}.c39-route-head{display:grid}.c39-route-head>strong{justify-self:start}.c39-challenge{grid-template-columns:1fr;padding:20px}.c39-challenge-mark{min-height:95px;font-size:3.3rem}.c39-challenge-controls{flex-direction:column}.c39-challenge-controls button{width:100%}.c39-progress{justify-content:space-between}}.c39-footer-nav{flex-wrap:wrap;justify-content:center;gap:16px;margin-top:24px;display:flex}.c39-footer-nav a{color:#2463bf;font-weight:700;text-decoration:none}.c39-compare-visual{justify-content:center;align-items:center;gap:18px;padding:40px;display:flex}.c39-compare-card{color:#fff;border-radius:24px;justify-content:center;align-items:center;width:120px;height:120px;font-size:2.6rem;font-weight:850;display:flex;box-shadow:0 14px 30px #163b692e}.c39-compare-card.negativo{background:linear-gradient(135deg,#b3261e,#d64545)}.c39-compare-card.positivo{background:linear-gradient(135deg,#1c7a4b,#2ea86b)}.c39-compare-op{color:#2463bf;background:#eef3fc;border-radius:50%;justify-content:center;align-items:center;width:56px;height:56px;font-size:1.6rem;font-weight:850;display:flex}.c39-mistake{background:#fff4de;border:1px solid #f0d9a8;border-radius:12px;margin-top:12px;padding:14px 16px}.c39-mistake b{color:#8a5a0a;margin-bottom:4px;display:block}.c39-mistake p{color:#6b4d1f;margin:0;font-size:.92rem;line-height:1.45}