body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f0f2f5;
    color: #333;
    margin: 0;
    padding: 20px;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    min-height: 100vh;
}

#game {
    background: #ffffff;
    padding: 24px;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    display: flex;
    flex-direction: column;
    align-items: center;
    max-width: 100%;
}

h1 {
    margin-top: 0;
    margin-bottom: 20px;
    font-size: 24px;
    color: #1a1a1a;
}

#controls {
    display: flex;
    gap: 12px;
    align-items: center;
    flex-wrap: wrap;
    margin-bottom: 20px;
    justify-content: center;
}

#controls label {
    font-size: 14px;
    font-weight: 500;
    color: #555;
}

#controls input[type="number"] {
    width: 60px;
    padding: 6px 8px;
    border: 1px solid #ccc;
    border-radius: 6px;
    font-size: 14px;
    text-align: center;
}

button {
    padding: 8px 16px;
    font-size: 14px;
    font-weight: 600;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    transition: background 0.2s, transform 0.1s;
}

#start {
    background-color: #2ecc71;
    color: white;
}

#start:hover {
    background-color: #27ae60;
}

#restart {
    background-color: #e74c3c;
    color: white;
}

#restart:hover {
    background-color: #c0392b;
}

button:active {
    transform: scale(0.98);
}

#gameArea {
    margin-top: 10px;
    overflow: auto;
    max-width: 100%;
    max-height: 70vh;
    border: 1px solid #ddd;
    border-radius: 6px;
}

#field {
    border-collapse: collapse;
    table-layout: fixed;
}

#field td {
    width: 25px;
    height: 25px;
    border: 1px solid #dcdcdc;
    padding: 0;
    transition: background-color 0.15s ease;
}

#field td.dead {
    background-color: #ffffff;
}

#field td.alive {
    background-color: #2c3e50; /* Строгий темный графитовый цвет */
    border-color: #1a252f;
}

.hidden {
    display: none !important;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}