.desafios-livro{text-align:center;margin:12px 0 16px}
.desafios-livro img{display:inline-block;max-width:100%;height:auto;border:0}
.filtro-desafios{margin:24px 0 18px;padding:17px;border:1px solid #236f9c;border-radius:12px;background:linear-gradient(135deg,#17698f 0%,#2787b5 55%,#4aa2c8 100%);box-shadow:0 5px 15px rgba(21,91,128,.22);overflow:hidden}
.filtro-titulo{margin-bottom:13px;color:#fff;font-size:1.08em;font-weight:bold;text-align:center;text-shadow:0 1px 1px rgba(0,0,0,.18)}
.filtro-opcoes{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:9px}
.filtro-nivel{display:flex;min-width:0;align-items:center;gap:7px;padding:10px 11px;border:1px solid rgba(255,255,255,.72);border-radius:9px;background:rgba(255,255,255,.94);color:#314b5b;text-decoration:none;box-shadow:0 2px 5px rgba(12,65,91,.12);transition:border-color .18s,box-shadow .18s,transform .18s}
.filtro-nivel:hover{border-color:#fff;background:#fff;box-shadow:0 4px 10px rgba(8,60,87,.22);text-decoration:none;transform:translateY(-1px)}
.filtro-nivel.ativo{border-color:#ffb04e;background:#fff0dc;box-shadow:inset 0 0 0 1px #ed8c18,0 3px 8px rgba(7,55,80,.16);color:#713e00}
.filtro-nome{flex:1;font-weight:bold;white-space:nowrap}
.filtro-total{display:inline-flex;min-width:25px;height:25px;padding:0 5px;align-items:center;justify-content:center;border-radius:13px;background:#eef1f4;color:#555;font-size:.82em;font-weight:bold}
.filtro-nivel.ativo .filtro-total{background:#df8c25;color:#fff}
.estrelas{display:inline-flex;flex:none;gap:1px;line-height:1}
.estrela{width:14px;height:14px;background:#aeb2b6;clip-path:polygon(50% 0,61% 35%,98% 35%,68% 57%,79% 93%,50% 71%,21% 93%,32% 57%,2% 35%,39% 35%)}
.estrela.ativa{background:#f29a18}
.resumo-desafios{margin:0 0 12px;padding:11px 14px;border-radius:8px;background:#f2f4f6;color:#40464d;text-align:center}
.lista-desafios{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
.desafio-card{position:relative;display:block;min-width:0;padding:14px 42px 14px 15px;border:1px solid #e0e3e6;border-left:4px solid #e79328;border-radius:9px;background:#fff;color:#262626;text-decoration:none;box-shadow:0 3px 9px rgba(0,0,0,.08);transition:border-color .18s,box-shadow .18s,transform .18s}
.desafio-card:hover{border-color:#e3a75e;background:#fffdfa;box-shadow:0 6px 14px rgba(90,62,29,.14);text-decoration:none;transform:translateY(-2px)}
.desafio-topo{display:flex;align-items:center;justify-content:space-between;gap:8px;margin-bottom:7px}
.desafio-numero{color:#c96f08;font-size:.9em;font-weight:bold}
.desafio-titulo{display:block;color:#242424;font-size:1.04em;font-weight:bold;line-height:1.35}
.desafio-seta{position:absolute;top:50%;right:15px;color:#d4811d;font-size:2em;line-height:1;transform:translateY(-53%)}
.anuncio-desafios{grid-column:1/-1;margin:4px 0}
.paginacao-desafios{display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:9px;margin:22px 0 18px}
.paginas-numeros{display:flex;flex-wrap:wrap;justify-content:center;gap:6px}
.paginacao-desafios a,.pagina-atual{display:inline-flex;min-width:36px;height:36px;padding:0 10px;align-items:center;justify-content:center;border:1px solid #df9a46;border-radius:7px;background:#fff;color:#b35f00;font-weight:bold;text-decoration:none;box-sizing:border-box}
.paginacao-desafios a:hover{background:#fff3e3;text-decoration:none}
.paginacao-desafios .pagina-atual{border-color:#d47b10;background:#df8c25;color:#fff}
.paginacao-desafios .pagina-seta{padding:0 13px}
.envie-desafio{margin-top:22px;padding:14px;border-top:1px solid #e5e5e5;text-align:center}
@media (max-width:700px){.filtro-opcoes{grid-template-columns:1fr}.lista-desafios{grid-template-columns:1fr}.desafio-card{padding-right:38px}}
@media (max-width:430px){.filtro-desafios{padding:12px}.filtro-opcoes{grid-template-columns:1fr}.filtro-nivel{padding:9px 10px}.desafio-topo{align-items:flex-start;flex-direction:column;gap:5px}.paginacao-desafios{align-items:stretch;flex-direction:column}.pagina-seta{align-self:center}}