* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background: #1a1a2e;
    color: #eee;
    font-family: 'Segoe UI', Arial, sans-serif;
    overflow: hidden;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

#menu-screen {
    text-align: center;
    width: 100%;
    max-width: 500px;
    padding: 20px;
}

h1 {
    font-size: 2.5rem;
    margin-bottom: 30px;
    color: #00d4ff;
    text-shadow: 0 0 10px rgba(0,212,255,0.5);
}

.mode-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 15px;
}

.mode-card {
    background: #16213e;
    border: 2px solid #0f3460;
    border-radius: 12px;
    padding: 20px 10px;
    cursor: pointer;
    transition: 0.2s;
    font-size: 1rem;
    font-weight: bold;
    user-select: none;
}

.mode-card:hover {
    background: #0f3460;
    border-color: #00d4ff;
    transform: scale(1.05);
}

#game-canvas {
    display: none;          /* скрыт пока не выбрана игра */
    background: #000;
    width: 100%;
    height: 100%;
}

/* Адаптив для мобильных */
@media (max-width: 600px) {
    h1 { font-size: 1.8rem; }
    .mode-card { padding: 15px 5px; font-size: 0.9rem; }
}