* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: Arial, Helvetica, sans-serif;
    background: linear-gradient(135deg, #e7f7ff, #fff2d8);
    color: #243044;
    min-height: 100vh;
}

.topo {
    background: #4f46e5;
    color: #ffffff;
    padding: 24px 8%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    flex-wrap: wrap;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.12);
}

.topo h1 {
    margin: 0 0 6px;
    font-size: 34px;
}

.topo p {
    margin: 0;
    opacity: 0.9;
}

.link-admin {
    background: #ffffff;
    color: #4f46e5;
    text-decoration: none;
    font-weight: bold;
    padding: 12px 18px;
    border-radius: 999px;
}

.container {
    width: min(980px, 92%);
    margin: 36px auto;
}

.card {
    background: #ffffff;
    border-radius: 28px;
    padding: 30px;
    box-shadow: 0 12px 30px rgba(31, 41, 55, 0.12);
    border: 4px solid rgba(79, 70, 229, 0.08);
}

.cadastro-card {
    max-width: 520px;
    margin: 0 auto;
}

.card h2 {
    margin-top: 0;
    color: #4f46e5;
    font-size: 30px;
}

label {
    display: block;
    margin: 18px 0 8px;
    font-weight: bold;
}

input,
select {
    width: 100%;
    padding: 14px 16px;
    border: 2px solid #d8def0;
    border-radius: 16px;
    font-size: 17px;
    outline: none;
}

input:focus,
select:focus {
    border-color: #4f46e5;
}

.botao {
    border: none;
    background: #16a34a;
    color: #ffffff;
    padding: 14px 22px;
    border-radius: 18px;
    font-size: 17px;
    font-weight: bold;
    cursor: pointer;
    transition: transform 0.15s, box-shadow 0.15s;
    box-shadow: 0 8px 18px rgba(22, 163, 74, 0.25);
}

.botao:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 22px rgba(22, 163, 74, 0.35);
}

.botao.grande {
    width: 100%;
    margin-top: 22px;
}

.erro {
    color: #dc2626;
    font-weight: bold;
}

.escondido {
    display: none !important;
}

.painel-aluno {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 14px;
    margin-bottom: 26px;
}

.painel-aluno div {
    background: #f3f4ff;
    border-radius: 18px;
    padding: 16px;
    text-align: center;
}

.painel-aluno span {
    display: block;
    font-size: 13px;
    color: #64748b;
    margin-bottom: 6px;
}

.painel-aluno strong {
    font-size: 18px;
    color: #111827;
}

.atividade {
    background: #fff7ed;
    border: 3px dashed #fb923c;
    border-radius: 24px;
    padding: 28px;
    text-align: center;
}

.tag {
    display: inline-block;
    background: #f97316;
    color: #ffffff;
    font-weight: bold;
    padding: 8px 14px;
    border-radius: 999px;
    margin: 0 0 16px;
}

#pergunta {
    color: #1f2937;
    font-size: 32px;
    line-height: 1.3;
}

.opcoes {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 14px;
    margin: 24px 0;
}

.opcao {
    background: #ffffff;
    color: #1f2937;
    border: 3px solid #fde68a;
    border-radius: 20px;
    padding: 18px;
    font-size: 22px;
    font-weight: bold;
    cursor: pointer;
    min-height: 78px;
}

.opcao:hover {
    background: #fffbeb;
}

.opcao.correta {
    background: #dcfce7;
    border-color: #22c55e;
}

.opcao.errada {
    background: #fee2e2;
    border-color: #ef4444;
}

.feedback {
    min-height: 32px;
    font-size: 22px;
    font-weight: bold;
}

.feedback.ok {
    color: #15803d;
}

.feedback.erro-feedback {
    color: #b91c1c;
}

.final-card {
    max-width: 540px;
    margin: 0 auto;
    text-align: center;
}

.resultado-final {
    font-size: 24px;
}

footer {
    text-align: center;
    padding: 18px;
    color: #64748b;
}

.tabela {
    width: 100%;
    border-collapse: collapse;
    margin-top: 18px;
}

.tabela th,
.tabela td {
    border-bottom: 1px solid #e5e7eb;
    padding: 12px;
    text-align: left;
}

.tabela th {
    background: #eef2ff;
    color: #3730a3;
}

.admin-menu {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    margin-bottom: 20px;
}

.admin-menu a,
.admin-menu button,
.link-botao {
    display: inline-block;
    border: none;
    background: #4f46e5;
    color: #ffffff;
    padding: 10px 14px;
    border-radius: 12px;
    text-decoration: none;
    cursor: pointer;
    font-weight: bold;
}

.cards-resumo {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin: 20px 0;
}

.cards-resumo div {
    background: #eef2ff;
    padding: 18px;
    border-radius: 18px;
}

.cards-resumo span {
    color: #64748b;
    display: block;
}

.cards-resumo strong {
    font-size: 28px;
    color: #4f46e5;
}

@media (max-width: 760px) {
    .painel-aluno,
    .opcoes,
    .cards-resumo {
        grid-template-columns: 1fr;
    }

    .topo h1,
    #pergunta {
        font-size: 26px;
    }
}