body {
    font-family: Arial, sans-serif;
    text-align: center;
}

h2 {
    opacity: 0.95;
}

button {
    padding: 12px 20px;
    margin: 10px;
    border-radius: 10px;
    border: none;
    cursor: pointer;
    font-weight: bold;
    background: #ffffff;
    color: #111827;
    transition: 0.2s;
}

button:hover {
    transform: scale(1.03);
}

.grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 10px;
    max-width: 900px;
    margin: auto;
}

.cell {
    min-height: 95px;
    padding: 10px;
    border-radius: 12px;
    background: rgba(255,255,255,0.08);
    cursor: pointer;
    font-size: 13px;
    line-height: 1.2;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: 0.2s;
    box-sizing: border-box;
}

.cell:hover {
    transform: scale(1.03);
    background: rgba(255,255,255,0.14);
}

.cell.selected {
    background: #22c55e;
    color: white;
    font-weight: bold;
}

.center {
    background: #facc15;
    color: black;
    font-weight: bold;
}

.home {
    padding: 80px 20px;
}

.choices {
    margin-top: 30px;
}

.btn {
    display: inline-block;
    padding: 20px;
    margin: 20px;
    border-radius: 12px;
    text-decoration: none;
    font-weight: bold;
    transition: 0.2s;
}

.btn:hover {
    transform: scale(1.04);
}

.irn {
    background: #1e3a8a;
    color: #facc15;
}

.aima {
    background: #6b21a8;
    color: white;
}

@media (max-width: 768px) {
    .grid {
        gap: 6px;
    }

    .cell {
        min-height: 78px;
        font-size: 11px;
        padding: 8px;
    }

    h1 {
        font-size: 34px !important;
    }

    h2 {
        font-size: 22px;
    }

    button {
        width: calc(100% - 20px);
        max-width: 420px;
    }

    .btn {
        display: block;
        max-width: 320px;
        margin: 12px auto;
    }
}