body {
    margin: 0;
    font-family: Arial, sans-serif;
    background: radial-gradient(circle at top, #1e293b, #020617);
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

/* Container */
.container {
    perspective: 1000px;
}

/* Tabela */
table {
    width: 650px;
    border-collapse: collapse;
    background: rgba(255,255,255,0.05);
    backdrop-filter: blur(10px);
    border-radius: 16px;
    overflow: hidden;
    transform-style: preserve-3d;
    transition: transform 0.1s ease;
    box-shadow: 0 20px 50px rgba(0,0,0,0.5);
}

/* Cabeçalho */
thead th {
    background: linear-gradient(135deg, #2563eb, #1d4ed8);
    color: white;
    padding: 14px;
}

/* Sub-cabeçalho */
thead tr:nth-child(2) th {
    background: linear-gradient(135deg, #3b82f6, #2563eb);
}

/* Células */
td, th {
    padding: 14px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
    color: #e2e8f0;

    /* 🔥 BLOQUEIA SELEÇÃO */
    user-select: none;
    pointer-events: auto;
}

/* Grupo */
.grupo td {
    background: rgba(255,255,255,0.03);
}

/* Junta Alta/Baixa */
.grupo + .grupo td {
    border-top: none;
}

.titulo {
    font-weight: bold;
    color: #f1f5f9;
}

/* brilho seguindo o mouse */
table::before {
    content: "";
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at var(--x) var(--y), rgba(255,255,255,0.15), transparent 40%);
    pointer-events: none;
}