:root {
    --fundo: #fff7e6;
    --cartao: #ffffff;
    --texto: #2d2a32;
    --suave: #6b6570;
    --primaria: #6c5ce7;
    --certo: #22a85a;
    --errado: #e5484d;
    --borda: #eadfcb;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    min-height: 100vh;
    background: var(--fundo);
    color: var(--texto);
    font-family: "Comic Sans MS", "Trebuchet MS", system-ui, sans-serif;
}

.app {
    max-width: 640px;
    margin: 0 auto;
    padding: 16px;
}

.topo { text-align: center; }
.topo h1 { margin: 8px 0 12px; font-size: 2rem; color: var(--primaria); }

.placar {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 8px;
    margin-bottom: 16px;
}
.placar .item {
    background: var(--cartao);
    border: 2px solid var(--borda);
    border-radius: 999px;
    padding: 4px 12px;
    font-weight: bold;
}

.cartao {
    background: var(--cartao);
    border: 3px solid var(--borda);
    border-radius: 24px;
    padding: 20px 16px 24px;
    text-align: center;
    box-shadow: 0 6px 0 var(--borda);
}
.cartao.acertou { border-color: var(--certo); box-shadow: 0 6px 0 var(--certo); animation: pulo .4s; }
.cartao.errou   { border-color: var(--errado); box-shadow: 0 6px 0 var(--errado); animation: treme .4s; }

.tipo { margin: 0; color: var(--suave); text-transform: uppercase; letter-spacing: 1px; font-size: .9rem; }

.conta {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: 12px;
    margin: 12px 0 20px;
    font-size: clamp(2.2rem, 10vw, 3.6rem);
    font-weight: bold;
}
.conta .sinal { color: var(--primaria); }
.conta .resultado {
    min-width: 1.6em;
    padding: 0 .2em;
    border-bottom: 4px dashed var(--primaria);
}

.opcoes {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 12px;
}

button { font: inherit; cursor: pointer; }

.opcao {
    padding: 16px 8px;
    font-size: 1.8rem;
    font-weight: bold;
    color: #fff;
    background: var(--primaria);
    border: none;
    border-radius: 16px;
    box-shadow: 0 5px 0 #4b3fb8;
    transition: transform .1s;
}
.opcao:hover:not(:disabled) { transform: translateY(-2px); }
.opcao:active:not(:disabled) { transform: translateY(3px); box-shadow: 0 2px 0 #4b3fb8; }
.opcao:disabled { cursor: default; }
.opcao.correta   { background: var(--certo);  box-shadow: 0 5px 0 #17773f; }
.opcao.incorreta { background: var(--errado); box-shadow: 0 5px 0 #a8292d; }
.opcao.apagada   { opacity: .35; }

.mensagem { font-size: 1.4rem; font-weight: bold; margin: 20px 0 8px; }
.dica { margin: 0 0 12px; font-size: 1.1rem; }

.proxima, .salvar {
    margin-top: 8px;
    padding: 14px 28px;
    font-size: 1.3rem;
    font-weight: bold;
    color: #fff;
    background: #ff8a00;
    border: none;
    border-radius: 999px;
    box-shadow: 0 5px 0 #c96c00;
}

.config {
    margin-top: 24px;
    background: var(--cartao);
    border: 2px solid var(--borda);
    border-radius: 16px;
    padding: 12px 16px;
}
.config summary { font-weight: bold; font-size: 1.2rem; cursor: pointer; }
.config fieldset { border: none; padding: 0; margin: 12px 0; }
.config legend { font-weight: bold; margin-bottom: 8px; }

.checks { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 8px; }
.check {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 10px;
    border: 2px solid var(--borda);
    border-radius: 12px;
}
.check input { width: 20px; height: 20px; }

.linha { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 12px; }
.linha label { display: flex; flex-direction: column; gap: 4px; font-weight: bold; }
.linha select {
    font: inherit;
    padding: 8px;
    border: 2px solid var(--borda);
    border-radius: 10px;
    background: #fff;
}

.obs { color: var(--suave); font-size: .9rem; }

.zerar {
    margin-top: 12px;
    padding: 8px 16px;
    background: none;
    border: 2px solid var(--errado);
    color: var(--errado);
    border-radius: 999px;
}

@keyframes pulo  { 50% { transform: scale(1.04); } }
@keyframes treme { 25% { transform: translateX(-8px); } 75% { transform: translateX(8px); } }

.instalar {
    margin: 0 0 12px;
    padding: 8px 18px;
    font-weight: bold;
    color: var(--primaria);
    background: var(--cartao);
    border: 2px solid var(--primaria);
    border-radius: 999px;
}
.instalar[hidden], .dica-ios[hidden] { display: none; }
.dica-ios {
    margin: 0 auto 12px;
    max-width: 420px;
    padding: 10px 14px;
    background: var(--cartao);
    border: 2px dashed var(--primaria);
    border-radius: 12px;
}
a.proxima { display: inline-block; text-decoration: none; }

/* ---------- Modo tabuada ---------- */
.progresso {
    display: inline-block;
    margin-left: 6px;
    padding: 2px 10px;
    background: var(--primaria);
    color: #fff;
    border-radius: 999px;
    letter-spacing: 0;
}

/* Mostra só as opções do modo escolhido. */
.config form:has(#modo-tabuada:checked) .so-aleatorio { display: none; }
.config form:not(:has(#modo-tabuada:checked)) .so-tabuada { display: none; }

.numeros {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 8px;
    margin-bottom: 12px;
}
.numero { position: relative; }
.numero input { position: absolute; opacity: 0; inset: 0; cursor: pointer; }
.numero span {
    display: block;
    padding: 10px 0;
    text-align: center;
    font-size: 1.3rem;
    font-weight: bold;
    border: 2px solid var(--borda);
    border-radius: 12px;
}
.numero input:checked + span { background: var(--primaria); border-color: var(--primaria); color: #fff; }
.numero input:focus-visible + span { outline: 3px solid #ff8a00; }

.ordem { display: flex; flex-direction: column; gap: 4px; font-weight: bold; }
.ordem select {
    font: inherit;
    padding: 8px;
    border: 2px solid var(--borda);
    border-radius: 10px;
    background: #fff;
}

.estudo {
    margin-top: 16px;
    background: var(--cartao);
    border: 2px solid var(--borda);
    border-radius: 16px;
    padding: 12px 16px;
}
.estudo summary { font-weight: bold; font-size: 1.1rem; cursor: pointer; }
.tabela {
    list-style: none;
    margin: 12px 0 0;
    padding: 0;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 6px;
    font-size: 1.3rem;
}
.tabela li { padding: 6px 10px; border-radius: 10px; background: var(--fundo); text-align: center; }