/* Atlas de Anatomia 3D — estilo (sem fontes/serviços externos) */
:root {
  /* Tema acadêmico, neutro: papel claro, cinza-carvão e azul-ardósia discreto */
  --bg: #f3f1ec; --bg2: #ffffff; --painel: #ffffff; --painel2: #ece9e2; --borda: #cfcac0;
  --texto: #25282c; --suave: #5d6168; --acento: #2f4c6e; --acento2: #2f4c6e; --ok: #1f7a55; --erro: #b4501f; --aviso: #f0d58a;
  --on-acento: #ffffff; --link: #1f4f86; --link-h: #0f2f55; --btn-bg: #ffffff; --btn-borda: #a9a49a; --btn-h: #2a4560;
  --erro-bg: #fbe9e2; --acerto-bg: #e6f4ed; --certa-bg: #dff1e8; --errada-bg: #f8e3d8; --aviso-bg: #fbf3d9; --aviso-borda: #d3b45a; --verif-bg: #f0d58a; --verif-tx: #3b2f00;
  --campo: #faf9f6; --realce: #e8eef5;
  --cena: #26282c; --ov-bg: rgba(34, 36, 40, .93); --ov-borda: #4a4d53; --ov-texto: #f1efe9; --ov-suave: #c4c2bb;
  --raio: 8px; --sombra: 0 2px 10px rgba(0, 0, 0, .12);
  --serif: Georgia, "Times New Roman", "Noto Serif", serif;
}
* { box-sizing: border-box; }
html { color-scheme: light; }
body { margin: 0; background: var(--bg); color: var(--texto); font: 16px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif; }
a { color: var(--link); }
a:hover { color: var(--link-h); }
:focus-visible { outline: 3px solid var(--acento); outline-offset: 2px; border-radius: 4px; }
.so-leitor { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.pular { position: absolute; left: -999px; top: 0; background: #fff; color: #000; border: 2px solid #000; padding: .6rem 1rem; z-index: 100; }
.pular:focus { left: 8px; top: 8px; }

/* Cabeçalho */
.topo { display: flex; align-items: center; gap: 1rem; flex-wrap: wrap; padding: .6rem 1rem; background: var(--bg2); border-bottom: 2px solid var(--acento); }
.marca { font-family: var(--serif); font-weight: 700; font-size: 1.2rem; color: var(--acento); text-decoration: none; display: flex; align-items: center; gap: .5rem; }
.marca svg { width: 26px; height: 26px; }
.topo nav { display: flex; gap: .25rem; margin-left: auto; flex-wrap: wrap; }
.topo nav a { padding: .45rem .9rem; border-radius: 999px; color: var(--texto); text-decoration: none; border: 1px solid transparent; }
.topo nav a:hover { background: var(--painel2); }
.topo nav a[aria-current="page"] { background: var(--acento); color: var(--on-acento); font-weight: 600; }

.parte-box { display: flex; align-items: center; gap: .4rem; margin-left: 1rem; font-size: .95rem; }
.parte-box select { width: auto; min-height: 36px; padding: .25rem .5rem; }

/* Botões e campos */
button, select, input[type="search"], input[type="number"] { font: inherit; color: var(--texto); }
.btn { background: var(--btn-bg); border: 1px solid var(--btn-borda); border-radius: 8px; padding: .5rem .85rem; cursor: pointer; min-height: 40px; }
.btn:hover:not(:disabled) { background: var(--painel2); }
.btn:disabled { opacity: .5; cursor: not-allowed; }
.btn.primario { background: var(--acento); border-color: var(--acento); color: var(--on-acento); font-weight: 600; }
.btn.primario:hover:not(:disabled) { background: var(--btn-h); color: #fff; }
.btn.grande { padding: .8rem 1.4rem; font-size: 1.1rem; border-radius: 12px; text-decoration: none; display: inline-block; }
.btn.pequeno { padding: .25rem .6rem; min-height: 32px; font-size: .9rem; }
select, input[type="search"], input[type="number"] { background: var(--campo); border: 1px solid var(--borda); border-radius: 8px; padding: .45rem .6rem; min-height: 40px; width: 100%; }
label { cursor: pointer; }
fieldset { border: 1px solid var(--borda); border-radius: var(--raio); margin: 0 0 .9rem; padding: .6rem .8rem .8rem; }
legend { padding: 0 .4rem; color: var(--suave); font-size: .9rem; }
input[type="checkbox"], input[type="radio"] { width: 1.15rem; height: 1.15rem; accent-color: var(--acento); vertical-align: -3px; margin-right: .4rem; }
input[type="range"] { width: 100%; accent-color: var(--acento); }

/* Layout das páginas de app */
.app { display: grid; gap: .75rem; padding: .75rem; height: calc(100vh - 64px); min-height: 560px; }
.app.explorar { grid-template-columns: 320px minmax(0, 1fr) 360px; }
.app.praticar { grid-template-columns: minmax(0, 1fr) 400px; }
.coluna { background: var(--painel); border: 1px solid var(--borda); border-radius: var(--raio); overflow: auto; padding: .8rem; min-height: 0; box-shadow: var(--sombra); }
.coluna h2 { font-family: var(--serif); font-size: 1.1rem; margin: .2rem 0 .6rem; }
.cena-wrap { position: relative; min-height: 0; border: 1px solid var(--borda); border-radius: var(--raio); overflow: hidden; background: var(--cena); }
.cena-canvas { display: block; width: 100%; height: 100%; touch-action: none; outline-offset: -3px; }
.barra-cena { position: absolute; top: 8px; left: 8px; right: 8px; display: flex; gap: .4rem; flex-wrap: wrap; pointer-events: none; }
.barra-cena > * { pointer-events: auto; }
.barra-cena .btn { background: var(--ov-bg); color: var(--ov-texto); border-color: var(--ov-borda); }
.barra-cena .btn:hover:not(:disabled) { background: #3a3d43; }
.barra-cena .btn[aria-pressed="true"] { background: #d9d4c7; color: #1c1d20; }
.btn-flutuante { position: absolute; top: 8px; right: 8px; z-index: 4; min-height: 44px; padding: .5rem .9rem; font-weight: 600; background: var(--ov-bg); color: var(--ov-texto); border: 2px solid var(--ov-borda); box-shadow: 0 2px 8px rgba(0,0,0,.4); }
.btn-flutuante:hover:not(:disabled) { background: #3a3d43; }
.btn-flutuante[aria-pressed="true"], .btn-flutuante[aria-pressed="true"]:hover:not(:disabled) { background: #d9d4c7; color: #1c1d20; border-color: #fff; }
.barra-cena { right: 190px; }
.barra-cena .so-movel { display: none; }
.pad { position: absolute; right: 10px; bottom: 56px; width: 132px; display: grid; grid-template-columns: repeat(3, 1fr); grid-template-rows: repeat(2, 1fr); gap: 4px; z-index: 3; opacity: .92; }
.pad .btn { background: var(--ov-bg); color: var(--ov-texto); border-color: var(--ov-borda); min-height: 40px; padding: 0; touch-action: none; user-select: none; }
.pad .btn:hover:not(:disabled), .pad .btn:active { background: #3a3d43; }
.pad [data-dir="cima"] { grid-column: 2; grid-row: 1; } .pad [data-dir="esq"] { grid-column: 1; grid-row: 2; } .pad [data-dir="baixo"] { grid-column: 2; grid-row: 2; } .pad [data-dir="dir"] { grid-column: 3; grid-row: 2; }
.barra-cena #b-zoom-mais, .barra-cena #b-zoom-menos { touch-action: none; user-select: none; }
.camada-ativa { position: absolute; left: 8px; bottom: 8px; color: var(--ov-texto); background: var(--ov-bg); border: 1px solid var(--ov-borda); border-radius: 8px; padding: .35rem .7rem; font-size: .92rem; }
.legenda { position: absolute; right: 8px; bottom: 8px; color: var(--ov-texto); background: var(--ov-bg); border: 1px solid var(--ov-borda); border-radius: 8px; padding: .35rem .7rem; font-size: .88rem; display: flex; gap: .8rem; flex-wrap: wrap; }
.carregando { position: absolute; inset: 0; display: grid; place-content: center; text-align: center; background: rgba(34, 36, 40, .92); color: var(--ov-texto); gap: .6rem; padding: 1rem; z-index: 5; }
.carregando[hidden] { display: none; }
.progresso-barra { width: min(320px, 70vw); height: 12px; background: #3a3d43; border-radius: 99px; overflow: hidden; border: 1px solid var(--borda); }
.progresso-barra > i { display: block; height: 100%; width: 0; background: #d9d4c7; transition: width .2s; }
.erro-box { background: var(--erro-bg); border: 1px solid var(--erro); border-radius: 8px; padding: .7rem .9rem; margin: .5rem 0; }

/* Formas da legenda (não dependem só de cor) */
.forma { display: inline-block; width: 14px; height: 14px; vertical-align: -2px; margin-right: .35rem; background: var(--c); border: 1px solid #5a5c60; }
.forma.losango { transform: rotate(45deg) scale(.82); }
.forma.circulo { border-radius: 50%; }
.forma.triangulo { clip-path: polygon(50% 0, 100% 100%, 0 100%); }

/* Lista de estruturas */
.busca { margin-bottom: .6rem; }
details.grupo { border: 1px solid var(--borda); border-radius: 6px; margin-bottom: .45rem; background: var(--campo); }
details.grupo > summary { cursor: pointer; padding: .5rem .7rem; font-weight: 600; list-style: none; display: flex; align-items: center; gap: .35rem; }
details.grupo > summary .contagem { margin-left: auto; }
details.grupo > summary::-webkit-details-marker { display: none; }
details.grupo > summary::before { content: "▸"; margin-right: .4rem; color: var(--acento); }
details.grupo[open] > summary::before { content: "▾"; }
details.sub { margin: 0 .4rem .3rem 1rem; }
details.sub > summary { font-weight: 500; color: var(--suave); padding: .3rem .4rem; }
.itens { list-style: none; margin: 0; padding: 0 .4rem .4rem; }
.itens button { width: 100%; text-align: left; background: transparent; border: 1px solid transparent; border-radius: 6px; padding: .4rem .5rem; cursor: pointer; color: var(--texto); line-height: 1.25; }
.itens button:hover { background: var(--painel2); }
.itens button[aria-pressed="true"] { background: var(--realce); border-color: var(--acento); }
.itens .la { display: block; font-size: .8rem; color: var(--suave); font-style: italic; }
.contagem { color: var(--suave); font-weight: 400; font-size: .9rem; }
.resultado-busca { color: var(--suave); font-size: .9rem; margin: .3rem 0; }

/* Painéis de controle */
.camada-linha { display: grid; grid-template-columns: 1fr; gap: .2rem; margin-bottom: .6rem; }
.camada-linha .linha1 { display: flex; align-items: center; justify-content: space-between; }
.camada-linha .opac { display: flex; gap: .5rem; align-items: center; font-size: .85rem; color: var(--suave); }
.grupo-botoes { display: flex; flex-wrap: wrap; gap: .4rem; margin: .4rem 0 .8rem; }
.dica { color: var(--suave); font-size: .88rem; margin: .2rem 0 .6rem; }

/* Detalhes */
.detalhe h2 { font-family: var(--serif); font-size: 1.35rem; margin: 0; line-height: 1.25; }
.detalhe .latim { font-style: italic; color: var(--suave); margin: .15rem 0; }
.etiquetas { display: flex; gap: .4rem; flex-wrap: wrap; margin: .5rem 0; }
.etiqueta { background: var(--painel2); border: 1px solid var(--borda); border-radius: 999px; padding: .1rem .6rem; font-size: .85rem; }
.campo { margin: .7rem 0; }
.campo dt { font-size: .8rem; text-transform: uppercase; letter-spacing: .05em; color: var(--acento); font-weight: 700; }
.campo dd { margin: .1rem 0 0; }
.verificar { display: inline-block; background: var(--verif-bg); color: var(--verif-tx); font-weight: 700; font-size: .75rem; padding: 0 .4rem; border-radius: 4px; margin-left: .3rem; vertical-align: 1px; }
.fonte { font-size: .8rem; color: var(--suave); border-top: 1px solid var(--borda); margin-top: 1rem; padding-top: .6rem; }
.vazio { color: var(--suave); }

/* Quiz */
.estado { display: none; }
.estado.ativo { display: block; }
.pergunta { font-size: 1.15rem; font-weight: 600; margin: .3rem 0 .6rem; }
.pergunta .latim { display: block; font-size: .9rem; font-weight: 400; font-style: italic; color: var(--suave); }
.topo-quiz { display: flex; justify-content: space-between; gap: .5rem; flex-wrap: wrap; font-size: .95rem; color: var(--suave); margin-bottom: .4rem; }
.cronometro { height: 8px; background: var(--painel2); border-radius: 99px; overflow: hidden; margin: .3rem 0 .6rem; }
.cronometro > i { display: block; height: 100%; width: 100%; background: var(--acento); transition: width 1s linear; }
.cronometro.pouco > i { background: var(--erro); }
.alternativas { display: grid; gap: .5rem; margin: .6rem 0; }
.alternativas button { text-align: left; padding: .7rem .8rem; }
.alternativas button.certa { background: var(--certa-bg); border-color: var(--ok); }
.alternativas button.errada { background: var(--errada-bg); border-color: var(--erro); }
.feedback { border-radius: 8px; padding: .7rem .9rem; margin: .6rem 0; border: 1px solid; }
.feedback.acerto { background: var(--acerto-bg); border-color: var(--ok); }
.feedback.erro { background: var(--erro-bg); border-color: var(--erro); }
.feedback strong.icone { font-size: 1.1rem; }
.explicacao { font-size: .95rem; margin-top: .4rem; }
.teclado { margin-top: .8rem; }
.placar { font-size: 2.2rem; font-weight: 700; }
.lista-erros { padding-left: 1.1rem; }
.lista-erros li { margin-bottom: .7rem; }
.tabela { width: 100%; border-collapse: collapse; font-size: .92rem; }
.tabela th, .tabela td { text-align: left; padding: .3rem .4rem; border-bottom: 1px solid var(--borda); }
.barra { height: 10px; background: var(--painel2); border-radius: 99px; overflow: hidden; min-width: 80px; }
.barra > i { display: block; height: 100%; background: var(--ok); }
.abas { display: flex; gap: .3rem; margin-bottom: .7rem; }
.abas button { flex: 1; }
.abas button[aria-selected="true"] { background: var(--acento); border-color: var(--acento); color: var(--on-acento); font-weight: 600; }

/* Página inicial */
.heroi { max-width: 980px; margin: 0 auto; padding: 2.2rem 1rem 1rem; }
.heroi h1 { font-family: var(--serif); font-weight: 700; font-size: clamp(1.8rem, 5vw, 2.8rem); margin: .2rem 0; line-height: 1.15; }
.heroi p.lead { font-size: 1.15rem; color: var(--suave); max-width: 60ch; }
.acoes { display: flex; gap: .8rem; flex-wrap: wrap; margin: 1.2rem 0; }
.cartoes { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: .8rem; margin: 1.5rem 0; }
.cartao { background: var(--painel); box-shadow: var(--sombra); border: 1px solid var(--borda); border-radius: var(--raio); padding: 1rem; }
.cartao h2, .cartao h3 { margin: 0 0 .3rem; font-size: 1.05rem; }
.secao { max-width: 980px; margin: 0 auto; padding: 0 1rem 1.2rem; }
.secao h2 { font-family: var(--serif); border-bottom: 1px solid var(--borda); padding-bottom: .3rem; }
.aviso-box { background: var(--aviso-bg); border: 1px solid var(--aviso-borda); border-radius: 8px; padding: .7rem .9rem; margin: .8rem 0; }
.rodape { text-align: center; color: var(--suave); padding: 1.5rem 1rem 2.5rem; font-size: .9rem; }
.creditos table { width: 100%; border-collapse: collapse; font-size: .92rem; }
.creditos th, .creditos td { text-align: left; vertical-align: top; padding: .45rem .5rem; border-bottom: 1px solid var(--borda); }

/* Tema escuro (neutro: carvão e cinza, azul-aço discreto) */
:root[data-tema="escuro"] {
  color-scheme: dark;
  --bg: #17181b; --bg2: #1f2125; --painel: #24262a; --painel2: #31343a; --borda: #43464d;
  --texto: #e7e5df; --suave: #a8a6a0; --acento: #9db9d8; --acento2: #9db9d8; --ok: #62c79b; --erro: #e2905c; --aviso: #7a6724;
  --campo: #1c1e21; --realce: #2d3947; --cena: #121315; --sombra: 0 2px 10px rgba(0, 0, 0, .5);
  --on-acento: #101820; --link: #9dbfe6; --link-h: #cfe1f5; --btn-bg: #2b2d32; --btn-borda: #5a5d65; --btn-h: #6b8fb8;
  --erro-bg: #3b2519; --acerto-bg: #1b3328; --certa-bg: #1d3a2b; --errada-bg: #44281b; --aviso-bg: #3a3218; --aviso-borda: #8a7432; --verif-bg: #d8bd62; --verif-tx: #2a2000;
}
:root[data-tema="escuro"] .barra-cena .btn[aria-pressed="true"] { background: #d9d4c7; color: #1c1d20; }
:root[data-tema="escuro"] .forma { border-color: #c9c7c0; }
:root[data-tema="escuro"] .btn:hover:not(:disabled) { background: #3a3d44; }
:root[data-tema="escuro"] .btn.primario:hover:not(:disabled) { color: #fff; }

/* ===== Celular / tablet ===== */
.so-movel, .abas-mobile { display: none; }
button, .btn, select, input { touch-action: manipulation; }
body { padding-left: env(safe-area-inset-left); padding-right: env(safe-area-inset-right); }

@media (max-width: 900px) {
  /* O app ocupa exatamente a altura da tela: modelo sempre visível em cima, painéis em abas embaixo */
  body.pagina-app { height: 100vh; height: 100dvh; display: flex; flex-direction: column; overflow: hidden; }
  body.pagina-app .app { flex: 1; min-height: 0; height: auto; padding: 6px; gap: 6px; display: flex; flex-direction: column; }
  body.pagina-app .cena-wrap { order: 0; position: relative; flex: 0 0 44vh; flex-basis: 44dvh; height: auto; min-height: 0; top: auto; }
  body.pagina-app .app.amplia .cena-wrap { flex-basis: 70dvh; }
  body.pagina-app .coluna { order: 2; flex: 1 1 0; min-height: 0; overflow: auto; -webkit-overflow-scrolling: touch; overscroll-behavior: contain; padding: .6rem; }
  .abas-mobile { order: 1; display: flex; gap: 4px; }
  .abas-mobile .btn { flex: 1; padding: .3rem .2rem; font-size: .95rem; }
  .abas-mobile .btn[aria-selected="true"] { background: var(--acento); border-color: var(--acento); color: var(--on-acento); font-weight: 700; }
  .so-movel, .barra-cena .so-movel { display: inline-flex; align-items: center; }
  .abas-esq { display: none; }
  .app[data-aba="detalhes"] .col-esq { display: none; }
  .app:not([data-aba="detalhes"]) #coluna-detalhes { display: none; }
  /* cabeçalho compacto */
  .topo { padding: .3rem .6rem; gap: .35rem .5rem; flex-wrap: wrap; }
  .topo nav { order: 5; width: 100%; justify-content: space-between; }
  .topo nav a { flex: 1; text-align: center; }
  .tema-txt { display: none; }
  .marca-txt { display: none; }
  .marca svg { width: 30px; height: 30px; }
  .parte-box { margin-left: 0; flex: 1; min-width: 0; }
  .parte-box label { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
  .parte-box select { width: 100%; min-width: 0; min-height: 40px; }
  .marca { order: 0; } .parte-box { order: 1; } .topo .btn.pequeno { order: 2; }
  .topo nav a { padding: .35rem .5rem; font-size: .95rem; }
  .topo .btn.pequeno { padding: .25rem .7rem; min-height: 40px; font-size: 1rem; white-space: nowrap; }
  /* controles sobre o modelo */
  .barra-cena { left: 6px; right: 6px; top: 6px; flex-wrap: nowrap; overflow-x: auto; padding-bottom: 2px; scrollbar-width: none; }
  .barra-cena::-webkit-scrollbar { display: none; }
  .barra-cena .btn { flex: 0 0 auto; white-space: nowrap; min-height: 40px; }
  .btn-flutuante { top: auto; right: auto; left: 6px; bottom: 44px; min-height: 44px; font-size: .9rem; padding: .4rem .7rem; }
  .pad { bottom: 44px; right: 6px; width: 132px; }
  .pad .btn { min-height: 44px; font-size: 1.1rem; }
  .camada-ativa { top: 52px; bottom: auto; left: 6px; right: auto; max-width: 62%; font-size: .78rem; padding: .2rem .5rem; }
  .legenda { left: 6px; right: 6px; bottom: 6px; justify-content: center; font-size: .78rem; padding: .2rem .5rem; gap: .6rem; }
  /* alvos de toque maiores e campos sem zoom automático no iOS */
  .btn { min-height: 44px; }
  select, input[type="search"], input[type="number"] { font-size: 16px; min-height: 44px; }
  .itens button { padding: .65rem .6rem; }
  details.grupo > summary { padding: .7rem .7rem; }
  input[type="checkbox"], input[type="radio"] { width: 1.3rem; height: 1.3rem; }
  .alternativas button { padding: .85rem .9rem; }
  .pergunta { font-size: 1.1rem; }
  #q-proxima { position: sticky; bottom: 0; z-index: 2; width: 100%; min-height: 48px; box-shadow: 0 -6px 12px var(--painel); }
  .heroi { padding-top: 1.2rem; }
}

/* Telas curtas (ex.: iPhone SE): menos elementos sobre o modelo */
@media (max-width: 900px) and (max-height: 640px) and (orientation: portrait) {
  .legenda { display: none; }
  .pad { bottom: 6px; width: 108px; }
  .pad .btn { min-height: 34px; }
  .btn-flutuante { bottom: 6px; min-height: 38px; }
  body.pagina-app .cena-wrap { flex-basis: 48dvh; }
}

/* Celular na horizontal: modelo à esquerda, painéis à direita */
@media (max-width: 900px) { .topo nav { margin-left: auto; } body.pagina-app .topo nav { margin-left: 0; } }
@media (max-width: 950px) and (orientation: landscape) and (max-height: 520px) {
  body.pagina-app .app { display: grid; grid-template-columns: 58% minmax(0, 1fr); grid-template-rows: auto minmax(0, 1fr); }
  body.pagina-app .cena-wrap { grid-column: 1; grid-row: 1 / span 2; flex: none; height: 100%; }
  .abas-mobile { grid-column: 2; grid-row: 1; }
  body.pagina-app .coluna { grid-column: 2; grid-row: 2; }
  body.pagina-app .app.amplia .cena-wrap { grid-column: 1; }
  body.pagina-app .app.praticar { grid-template-rows: minmax(0, 1fr); }
  body.pagina-app .app.praticar .coluna { grid-row: 1; }
  .topo { flex-wrap: nowrap; }
  .topo nav { order: 0; width: auto; margin-left: auto; }
  .topo nav a { flex: none; padding: .3rem .5rem; }
  .btn-flutuante { bottom: 40px; }
  .pad { bottom: 40px; width: 120px; }
  .pad .btn { min-height: 38px; }
  .camada-ativa { top: 48px; }
}

/* Responsivo */
@media (max-width: 1100px) { .app.explorar { grid-template-columns: 280px minmax(0, 1fr) 320px; } .app.praticar { grid-template-columns: minmax(0, 1fr) 360px; } }
@media (max-width: 900px) { .detalhe-badge { display: none; } }
@media (prefers-reduced-motion: reduce) { * { transition: none !important; animation: none !important; } }
@media (forced-colors: active) { .forma { forced-color-adjust: none; } }