:root { --azul-sub: #176b87; --azul-suave: #e0f4ff; --mesa-clara: #fff2cf; --mesa-borda: #b77a35; --texto-sub: #30434c; --foco-sub: #7b46b3; }
* { box-sizing: border-box; }
[hidden] { display: none !important; }
body { min-height: 100vh; margin: 0; color: var(--texto-sub); background: linear-gradient(145deg, #eefaff, #f4faed); font-family: system-ui, sans-serif; }
.pagina-subtracao { width: min(1180px, calc(100% - 28px)); min-height: 100vh; margin: auto; padding: 8px 0 12px; }
.navegacao-ambiente { position: fixed; z-index: 100; inset-block-start: 12px; inset-inline: 12px; display: flex; justify-content: space-between; gap: 12px; pointer-events: none; }
.navegacao-ambiente .botao { min-width: 112px; min-height: 50px; background: rgb(255 255 255 / 96%); border-color: #bddce9; box-shadow: 0 7px 18px rgb(47 93 113 / 14%); pointer-events: auto; cursor: pointer; }
.cartao-tela { height: calc(100svh - 20px); min-height: 0; border: 3px solid #fff; border-radius: 32px; background: rgb(255 255 255 / 95%); box-shadow: 0 18px 50px rgb(53 102 122 / 14%); }
.escolha-objeto { display: grid; grid-template-rows: auto minmax(0, 1fr); align-items: center; gap: clamp(12px, 2vh, 22px); padding: clamp(22px, 4vh, 42px) clamp(24px, 5vw, 58px); text-align: center; }
.cabecalho-escolha { align-self: end; } .cabecalho-escolha p { margin: 4px 0; } .cabecalho-escolha h1 { margin: .1em 0; font-size: clamp(2rem, 5vw, 3.8rem); }
.opcoes-objetos { display: grid; grid-template-columns: repeat(5, minmax(120px, 1fr)); grid-template-rows: repeat(2, minmax(0, 1fr)); align-self: stretch; gap: clamp(10px, 1.6vw, 18px); max-height: 510px; }
.opcao-objeto { min-width: 0; min-height: 0; display: grid; grid-template-rows: minmax(0, 1fr) auto; place-items: center; gap: 5px; padding: 10px; border: 3px solid #bddce9; border-radius: 22px; color: var(--texto-sub); background: linear-gradient(145deg, #fff, var(--azul-suave)); font: 850 1rem/1.15 system-ui, sans-serif; cursor: pointer; }
.opcao-objeto img { width: min(100%, 112px); height: min(100%, 112px); min-height: 60px; object-fit: contain; }
.atividade { display: grid; grid-template-rows: auto minmax(0, 1fr) auto; gap: clamp(5px, .8vh, 8px); padding: 56px clamp(12px, 2vw, 24px) 8px; }
.orientacao { min-height: 46px; display: grid; justify-items: center; align-content: center; text-align: center; }
.instrucao { margin: 0; font-size: clamp(1.15rem, 2.4vw, 1.65rem); font-weight: 900; } .feedback { min-height: 1.25em; margin: 0; color: #793f22; font-weight: 800; }
.area-concreta { min-height: 0; display: grid; grid-template-columns: minmax(145px, .2fr) minmax(0, 1fr); grid-template-rows: auto minmax(0, 1fr); column-gap: clamp(10px, 1.6vw, 18px); row-gap: 5px; }
.controles-mesa { grid-column: 2; min-height: 46px; display: flex; justify-content: flex-end; align-items: center; gap: 8px; }
.botao-controle-mesa { min-height: 44px; display: inline-grid; grid-template-columns: 1.5rem auto; align-items: center; gap: .4rem; padding: .3rem .72rem; color: var(--texto-sub); background: rgb(255 255 255 / 96%); border: 2px solid #9dcfe3; border-radius: 999rem; box-shadow: 0 .22rem .7rem rgb(38 50 56 / 12%); font: 800 .84rem/1.1 system-ui, sans-serif; cursor: pointer; }
.botao-controle-mesa svg { width: 1.5rem; height: 1.5rem; fill: none; stroke: var(--azul-sub); stroke-linecap: round; stroke-linejoin: round; stroke-width: 4; } .botao-controle-mesa svg path:last-child { fill: var(--azul-sub); stroke: var(--azul-sub); }
.botao-trocar-objeto { grid-template-columns: 2.25rem 1.5rem auto; } .botao-trocar-objeto img { width: 2.25rem; height: 2.25rem; object-fit: contain; }
.area-disponivel { display: grid; place-items: center; min-height: 0; border: 3px dashed #bddce9; border-radius: 24px; background: var(--azul-suave); }
.objeto-disponivel { width: min(84%, 145px); min-height: 140px; display: grid; place-items: center; gap: 2px; padding: 8px; border: 3px solid #78b6cc; border-radius: 22px; color: var(--azul-sub); background: #fff; font: 850 .9rem/1.1 system-ui, sans-serif; cursor: grab; touch-action: manipulation; }
.objeto-disponivel img { width: min(100%, 100px); height: 100px; object-fit: contain; } .objeto-disponivel.arrastando { opacity: .55; cursor: grabbing; }
.operacao-concreta { min-height: 0; display: grid; grid-template-rows: minmax(150px, 1fr) minmax(94px, .58fr); align-items: stretch; gap: 6px; }
.operacao-superior { min-height: 0; display: grid; grid-template-columns: minmax(0, 1.15fr) auto minmax(180px, .85fr); align-items: stretch; gap: clamp(7px, 1vw, 12px); }
.mesa { min-width: 0; display: grid; grid-template-rows: auto minmax(0, 1fr); place-items: center; padding: 6px clamp(9px, 1.4vw, 16px); border: 6px solid var(--mesa-borda); border-radius: 25px 25px 34px 34px; background: linear-gradient(160deg, #fff8df, var(--mesa-clara)); box-shadow: inset 0 -8px 0 rgb(183 122 53 / 12%); }
.mesa h2, .area-retirados h2 { margin: 0; color: #52666e; font-size: .82rem; line-height: 1.1; }
.mesa-restantes { width: 100%; min-height: 94px; border-width: 5px; }
.mesa.recebendo { border-color: var(--foco-sub); background: #f5effb; }
.grupo-objetos { width: max-content; max-width: 100%; display: grid; grid-template-columns: repeat(var(--object-columns, 1), minmax(42px, 66px)); grid-auto-rows: minmax(62px, 1fr); place-content: center; gap: 5px; }
.objeto-na-mesa { min-width: 0; display: grid; place-items: center; padding: 2px; border: 3px solid transparent; border-radius: 15px; background: transparent; cursor: default; }
button.objeto-na-mesa { cursor: pointer; } button.objeto-na-mesa:hover { border-color: #78b6cc; background: #fff; }
.objeto-na-mesa img, .objeto-retirado img { width: min(100%, 62px); height: min(7.2vh, 62px); min-height: 42px; object-fit: contain; }
.sinal-menos { align-self: center; color: var(--azul-sub); font: 950 clamp(3rem, 5vw, 4.5rem)/1 system-ui, sans-serif; }
.area-retirados { min-width: 0; display: grid; grid-template-rows: auto minmax(0, 1fr); place-items: center; padding: 6px; border: 3px dashed #b8c8cf; border-radius: 24px; background: #f3f7f8; }
.objeto-retirado { position: relative; display: grid; place-items: center; opacity: .56; }
.marca-retirado { position: absolute; color: #a42525; font: 950 clamp(2.8rem, 5vw, 4rem)/1 system-ui, sans-serif; text-shadow: 0 0 3px #fff, 0 0 3px #fff; }
.alternativas { display: grid; grid-template-columns: repeat(3, minmax(90px, 145px)); justify-content: center; gap: clamp(14px, 3vw, 26px); }
.alternativa { min-height: 68px; border: 3px solid #78b6cc; border-radius: 20px; color: var(--azul-sub); background: #fff; font: 950 clamp(2rem, 4vw, 3rem)/1 system-ui, sans-serif; cursor: pointer; }
.resultado { display: grid; justify-items: center; align-content: center; gap: 2px; text-align: center; } .expressao { margin: 0; color: var(--azul-sub); font: 950 clamp(2.4rem, 5.5vw, 4.2rem)/1 system-ui, sans-serif; } .resultado-apoio { margin: 0; font-weight: 800; }
.falha { padding: 72px 30px; }
.opcao-objeto:hover, .objeto-disponivel:hover, .alternativa:hover { background: var(--azul-suave); }
.opcao-objeto:focus-visible, .objeto-disponivel:focus-visible, .objeto-na-mesa:focus-visible, .alternativa:focus-visible, .botao:focus-visible, .botao-controle-mesa:focus-visible { outline: 5px solid var(--foco-sub); outline-offset: 3px; }
.objeto-chegando { animation: objeto-chegando .24s ease-out; } .objeto-saindo { animation: objeto-saindo .36s ease-out; }
@keyframes objeto-chegando { from { opacity: .2; transform: translateY(-18px) scale(.75); } to { opacity: 1; transform: none; } }
@keyframes objeto-saindo { from { opacity: 1; transform: translateX(-70px) scale(1.04); } to { opacity: .56; transform: none; } }
@media (prefers-reduced-motion: reduce) { *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; } }